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Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
Nicolas Kaiser9611c182010-10-06 14:23:22 +02008 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Avi Kivity6aa8b732006-12-10 02:21:36 -08009 *
10 * Authors:
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 *
14 * This work is licensed under the terms of the GNU GPL, version 2. See
15 * the COPYING file in the top-level directory.
16 *
17 */
18
Eddie Dong85f455f2007-07-06 12:20:49 +030019#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080020#include "mmu.h"
Avi Kivitye4956062007-06-28 14:15:57 -040021
Avi Kivityedf88412007-12-16 11:02:48 +020022#include <linux/kvm_host.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080023#include <linux/module.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020024#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080025#include <linux/mm.h>
26#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040027#include <linux/sched.h>
Avi Kivityc7addb92007-09-16 18:58:32 +020028#include <linux/moduleparam.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030029#include <linux/ftrace_event.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
Shane Wangcafd6652010-04-29 12:09:01 -040031#include <linux/tboot.h>
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030032#include "kvm_cache_regs.h"
Avi Kivity35920a32008-07-03 14:50:12 +030033#include "x86.h"
Avi Kivitye4956062007-06-28 14:15:57 -040034
Avi Kivity6aa8b732006-12-10 02:21:36 -080035#include <asm/io.h>
Anthony Liguori3b3be0d2006-12-13 00:33:43 -080036#include <asm/desc.h>
Eduardo Habkost13673a92008-11-17 19:03:13 -020037#include <asm/vmx.h>
Eduardo Habkost6210e372008-11-17 19:03:16 -020038#include <asm/virtext.h>
Andi Kleena0861c02009-06-08 17:37:09 +080039#include <asm/mce.h>
Dexuan Cui2acf9232010-06-10 11:27:12 +080040#include <asm/i387.h>
41#include <asm/xcr.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080042
Marcelo Tosatti229456f2009-06-17 09:22:14 -030043#include "trace.h"
44
Avi Kivity4ecac3f2008-05-13 13:23:38 +030045#define __ex(x) __kvm_handle_fault_on_reboot(x)
Avi Kivity5e520e62011-05-15 10:13:12 -040046#define __ex_clear(x, reg) \
47 ____kvm_handle_fault_on_reboot(x, "xor " reg " , " reg)
Avi Kivity4ecac3f2008-05-13 13:23:38 +030048
Avi Kivity6aa8b732006-12-10 02:21:36 -080049MODULE_AUTHOR("Qumranet");
50MODULE_LICENSE("GPL");
51
Avi Kivity4462d212009-03-23 17:53:37 +020052static int __read_mostly bypass_guest_pf = 1;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020053module_param(bypass_guest_pf, bool, S_IRUGO);
Avi Kivityc7addb92007-09-16 18:58:32 +020054
Avi Kivity4462d212009-03-23 17:53:37 +020055static int __read_mostly enable_vpid = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020056module_param_named(vpid, enable_vpid, bool, 0444);
Sheng Yang2384d2b2008-01-17 15:14:33 +080057
Avi Kivity4462d212009-03-23 17:53:37 +020058static int __read_mostly flexpriority_enabled = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020059module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO);
Avi Kivity4c9fc8e2008-03-24 18:15:14 +020060
Avi Kivity4462d212009-03-23 17:53:37 +020061static int __read_mostly enable_ept = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020062module_param_named(ept, enable_ept, bool, S_IRUGO);
Sheng Yangd56f5462008-04-25 10:13:16 +080063
Nitin A Kamble3a624e22009-06-08 11:34:16 -070064static int __read_mostly enable_unrestricted_guest = 1;
65module_param_named(unrestricted_guest,
66 enable_unrestricted_guest, bool, S_IRUGO);
67
Avi Kivity4462d212009-03-23 17:53:37 +020068static int __read_mostly emulate_invalid_guest_state = 0;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020069module_param(emulate_invalid_guest_state, bool, S_IRUGO);
Mohammed Gamal04fa4d32008-08-17 16:39:48 +030070
Dongxiao Xub923e622010-05-11 18:29:45 +080071static int __read_mostly vmm_exclusive = 1;
72module_param(vmm_exclusive, bool, S_IRUGO);
73
Anthony Liguori443381a2010-12-06 10:53:38 -060074static int __read_mostly yield_on_hlt = 1;
75module_param(yield_on_hlt, bool, S_IRUGO);
76
Nadav Har'El801d3422011-05-25 23:02:23 +030077/*
78 * If nested=1, nested virtualization is supported, i.e., guests may use
79 * VMX and be a hypervisor for its own guests. If nested=0, guests may not
80 * use VMX instructions.
81 */
82static int __read_mostly nested = 0;
83module_param(nested, bool, S_IRUGO);
84
Avi Kivitycdc0e242009-12-06 17:21:14 +020085#define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \
86 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
87#define KVM_GUEST_CR0_MASK \
88 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
89#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \
Avi Kivity81231c62010-01-24 16:26:40 +020090 (X86_CR0_WP | X86_CR0_NE)
Avi Kivitycdc0e242009-12-06 17:21:14 +020091#define KVM_VM_CR0_ALWAYS_ON \
92 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
Avi Kivity4c386092009-12-07 12:26:18 +020093#define KVM_CR4_GUEST_OWNED_BITS \
94 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
95 | X86_CR4_OSXMMEXCPT)
96
Avi Kivitycdc0e242009-12-06 17:21:14 +020097#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
98#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
99
Avi Kivity78ac8b42010-04-08 18:19:35 +0300100#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
101
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800102/*
103 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
104 * ple_gap: upper bound on the amount of time between two successive
105 * executions of PAUSE in a loop. Also indicate if ple enabled.
Rik van Riel00c25bc2011-01-04 09:51:33 -0500106 * According to test, this time is usually smaller than 128 cycles.
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800107 * ple_window: upper bound on the amount of time a guest is allowed to execute
108 * in a PAUSE loop. Tests indicate that most spinlocks are held for
109 * less than 2^12 cycles
110 * Time is measured based on a counter that runs at the same rate as the TSC,
111 * refer SDM volume 3b section 21.6.13 & 22.1.3.
112 */
Rik van Riel00c25bc2011-01-04 09:51:33 -0500113#define KVM_VMX_DEFAULT_PLE_GAP 128
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800114#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
115static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
116module_param(ple_gap, int, S_IRUGO);
117
118static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
119module_param(ple_window, int, S_IRUGO);
120
Avi Kivity61d2ef22010-04-28 16:40:38 +0300121#define NR_AUTOLOAD_MSRS 1
Nadav Har'Elff2f6fe2011-05-25 23:05:27 +0300122#define VMCS02_POOL_SIZE 1
Avi Kivity61d2ef22010-04-28 16:40:38 +0300123
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400124struct vmcs {
125 u32 revision_id;
126 u32 abort;
127 char data[0];
128};
129
Nadav Har'Eld462b812011-05-24 15:26:10 +0300130/*
131 * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also
132 * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs
133 * loaded on this CPU (so we can clear them if the CPU goes down).
134 */
135struct loaded_vmcs {
136 struct vmcs *vmcs;
137 int cpu;
138 int launched;
139 struct list_head loaded_vmcss_on_cpu_link;
140};
141
Avi Kivity26bb0982009-09-07 11:14:12 +0300142struct shared_msr_entry {
143 unsigned index;
144 u64 data;
Avi Kivityd5696722009-12-02 12:28:47 +0200145 u64 mask;
Avi Kivity26bb0982009-09-07 11:14:12 +0300146};
147
Nadav Har'Elec378ae2011-05-25 23:02:54 +0300148/*
Nadav Har'Ela9d30f32011-05-25 23:03:55 +0300149 * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a
150 * single nested guest (L2), hence the name vmcs12. Any VMX implementation has
151 * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is
152 * stored in guest memory specified by VMPTRLD, but is opaque to the guest,
153 * which must access it using VMREAD/VMWRITE/VMCLEAR instructions.
154 * More than one of these structures may exist, if L1 runs multiple L2 guests.
155 * nested_vmx_run() will use the data here to build a vmcs02: a VMCS for the
156 * underlying hardware which will be used to run L2.
157 * This structure is packed to ensure that its layout is identical across
158 * machines (necessary for live migration).
159 * If there are changes in this struct, VMCS12_REVISION must be changed.
160 */
Nadav Har'El22bd0352011-05-25 23:05:57 +0300161typedef u64 natural_width;
Nadav Har'Ela9d30f32011-05-25 23:03:55 +0300162struct __packed vmcs12 {
163 /* According to the Intel spec, a VMCS region must start with the
164 * following two fields. Then follow implementation-specific data.
165 */
166 u32 revision_id;
167 u32 abort;
Nadav Har'El22bd0352011-05-25 23:05:57 +0300168
Nadav Har'El27d6c862011-05-25 23:06:59 +0300169 u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */
170 u32 padding[7]; /* room for future expansion */
171
Nadav Har'El22bd0352011-05-25 23:05:57 +0300172 u64 io_bitmap_a;
173 u64 io_bitmap_b;
174 u64 msr_bitmap;
175 u64 vm_exit_msr_store_addr;
176 u64 vm_exit_msr_load_addr;
177 u64 vm_entry_msr_load_addr;
178 u64 tsc_offset;
179 u64 virtual_apic_page_addr;
180 u64 apic_access_addr;
181 u64 ept_pointer;
182 u64 guest_physical_address;
183 u64 vmcs_link_pointer;
184 u64 guest_ia32_debugctl;
185 u64 guest_ia32_pat;
186 u64 guest_ia32_efer;
187 u64 guest_ia32_perf_global_ctrl;
188 u64 guest_pdptr0;
189 u64 guest_pdptr1;
190 u64 guest_pdptr2;
191 u64 guest_pdptr3;
192 u64 host_ia32_pat;
193 u64 host_ia32_efer;
194 u64 host_ia32_perf_global_ctrl;
195 u64 padding64[8]; /* room for future expansion */
196 /*
197 * To allow migration of L1 (complete with its L2 guests) between
198 * machines of different natural widths (32 or 64 bit), we cannot have
199 * unsigned long fields with no explict size. We use u64 (aliased
200 * natural_width) instead. Luckily, x86 is little-endian.
201 */
202 natural_width cr0_guest_host_mask;
203 natural_width cr4_guest_host_mask;
204 natural_width cr0_read_shadow;
205 natural_width cr4_read_shadow;
206 natural_width cr3_target_value0;
207 natural_width cr3_target_value1;
208 natural_width cr3_target_value2;
209 natural_width cr3_target_value3;
210 natural_width exit_qualification;
211 natural_width guest_linear_address;
212 natural_width guest_cr0;
213 natural_width guest_cr3;
214 natural_width guest_cr4;
215 natural_width guest_es_base;
216 natural_width guest_cs_base;
217 natural_width guest_ss_base;
218 natural_width guest_ds_base;
219 natural_width guest_fs_base;
220 natural_width guest_gs_base;
221 natural_width guest_ldtr_base;
222 natural_width guest_tr_base;
223 natural_width guest_gdtr_base;
224 natural_width guest_idtr_base;
225 natural_width guest_dr7;
226 natural_width guest_rsp;
227 natural_width guest_rip;
228 natural_width guest_rflags;
229 natural_width guest_pending_dbg_exceptions;
230 natural_width guest_sysenter_esp;
231 natural_width guest_sysenter_eip;
232 natural_width host_cr0;
233 natural_width host_cr3;
234 natural_width host_cr4;
235 natural_width host_fs_base;
236 natural_width host_gs_base;
237 natural_width host_tr_base;
238 natural_width host_gdtr_base;
239 natural_width host_idtr_base;
240 natural_width host_ia32_sysenter_esp;
241 natural_width host_ia32_sysenter_eip;
242 natural_width host_rsp;
243 natural_width host_rip;
244 natural_width paddingl[8]; /* room for future expansion */
245 u32 pin_based_vm_exec_control;
246 u32 cpu_based_vm_exec_control;
247 u32 exception_bitmap;
248 u32 page_fault_error_code_mask;
249 u32 page_fault_error_code_match;
250 u32 cr3_target_count;
251 u32 vm_exit_controls;
252 u32 vm_exit_msr_store_count;
253 u32 vm_exit_msr_load_count;
254 u32 vm_entry_controls;
255 u32 vm_entry_msr_load_count;
256 u32 vm_entry_intr_info_field;
257 u32 vm_entry_exception_error_code;
258 u32 vm_entry_instruction_len;
259 u32 tpr_threshold;
260 u32 secondary_vm_exec_control;
261 u32 vm_instruction_error;
262 u32 vm_exit_reason;
263 u32 vm_exit_intr_info;
264 u32 vm_exit_intr_error_code;
265 u32 idt_vectoring_info_field;
266 u32 idt_vectoring_error_code;
267 u32 vm_exit_instruction_len;
268 u32 vmx_instruction_info;
269 u32 guest_es_limit;
270 u32 guest_cs_limit;
271 u32 guest_ss_limit;
272 u32 guest_ds_limit;
273 u32 guest_fs_limit;
274 u32 guest_gs_limit;
275 u32 guest_ldtr_limit;
276 u32 guest_tr_limit;
277 u32 guest_gdtr_limit;
278 u32 guest_idtr_limit;
279 u32 guest_es_ar_bytes;
280 u32 guest_cs_ar_bytes;
281 u32 guest_ss_ar_bytes;
282 u32 guest_ds_ar_bytes;
283 u32 guest_fs_ar_bytes;
284 u32 guest_gs_ar_bytes;
285 u32 guest_ldtr_ar_bytes;
286 u32 guest_tr_ar_bytes;
287 u32 guest_interruptibility_info;
288 u32 guest_activity_state;
289 u32 guest_sysenter_cs;
290 u32 host_ia32_sysenter_cs;
291 u32 padding32[8]; /* room for future expansion */
292 u16 virtual_processor_id;
293 u16 guest_es_selector;
294 u16 guest_cs_selector;
295 u16 guest_ss_selector;
296 u16 guest_ds_selector;
297 u16 guest_fs_selector;
298 u16 guest_gs_selector;
299 u16 guest_ldtr_selector;
300 u16 guest_tr_selector;
301 u16 host_es_selector;
302 u16 host_cs_selector;
303 u16 host_ss_selector;
304 u16 host_ds_selector;
305 u16 host_fs_selector;
306 u16 host_gs_selector;
307 u16 host_tr_selector;
Nadav Har'Ela9d30f32011-05-25 23:03:55 +0300308};
309
310/*
311 * VMCS12_REVISION is an arbitrary id that should be changed if the content or
312 * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and
313 * VMPTRLD verifies that the VMCS region that L1 is loading contains this id.
314 */
315#define VMCS12_REVISION 0x11e57ed0
316
317/*
318 * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region
319 * and any VMCS region. Although only sizeof(struct vmcs12) are used by the
320 * current implementation, 4K are reserved to avoid future complications.
321 */
322#define VMCS12_SIZE 0x1000
323
Nadav Har'Elff2f6fe2011-05-25 23:05:27 +0300324/* Used to remember the last vmcs02 used for some recently used vmcs12s */
325struct vmcs02_list {
326 struct list_head list;
327 gpa_t vmptr;
328 struct loaded_vmcs vmcs02;
329};
330
Nadav Har'Ela9d30f32011-05-25 23:03:55 +0300331/*
Nadav Har'Elec378ae2011-05-25 23:02:54 +0300332 * The nested_vmx structure is part of vcpu_vmx, and holds information we need
333 * for correct emulation of VMX (i.e., nested VMX) on this vcpu.
334 */
335struct nested_vmx {
336 /* Has the level1 guest done vmxon? */
337 bool vmxon;
Nadav Har'Ela9d30f32011-05-25 23:03:55 +0300338
339 /* The guest-physical address of the current VMCS L1 keeps for L2 */
340 gpa_t current_vmptr;
341 /* The host-usable pointer to the above */
342 struct page *current_vmcs12_page;
343 struct vmcs12 *current_vmcs12;
Nadav Har'Elff2f6fe2011-05-25 23:05:27 +0300344
345 /* vmcs02_list cache of VMCSs recently used to run L2 guests */
346 struct list_head vmcs02_pool;
347 int vmcs02_num;
Nadav Har'Elec378ae2011-05-25 23:02:54 +0300348};
349
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400350struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000351 struct kvm_vcpu vcpu;
Avi Kivity313dbd42008-07-17 18:04:30 +0300352 unsigned long host_rsp;
Avi Kivity29bd8a72007-09-10 17:27:03 +0300353 u8 fail;
Avi Kivity69c73022011-03-07 15:26:44 +0200354 u8 cpl;
Avi Kivity9d58b932011-03-07 16:52:07 +0200355 bool nmi_known_unmasked;
Avi Kivity51aa01d2010-07-20 14:31:20 +0300356 u32 exit_intr_info;
Avi Kivity1155f762007-11-22 11:30:47 +0200357 u32 idt_vectoring_info;
Avi Kivity6de12732011-03-07 12:51:22 +0200358 ulong rflags;
Avi Kivity26bb0982009-09-07 11:14:12 +0300359 struct shared_msr_entry *guest_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400360 int nmsrs;
361 int save_nmsrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400362#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300363 u64 msr_host_kernel_gs_base;
364 u64 msr_guest_kernel_gs_base;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400365#endif
Nadav Har'Eld462b812011-05-24 15:26:10 +0300366 /*
367 * loaded_vmcs points to the VMCS currently used in this vcpu. For a
368 * non-nested (L1) guest, it always points to vmcs01. For a nested
369 * guest (L2), it points to a different VMCS.
370 */
371 struct loaded_vmcs vmcs01;
372 struct loaded_vmcs *loaded_vmcs;
373 bool __launched; /* temporary, used in vmx_vcpu_run */
Avi Kivity61d2ef22010-04-28 16:40:38 +0300374 struct msr_autoload {
375 unsigned nr;
376 struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS];
377 struct vmx_msr_entry host[NR_AUTOLOAD_MSRS];
378 } msr_autoload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400379 struct {
380 int loaded;
381 u16 fs_sel, gs_sel, ldt_sel;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200382 int gs_ldt_reload_needed;
383 int fs_reload_needed;
Mike Dayd77c26f2007-10-08 09:02:08 -0400384 } host_state;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200385 struct {
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300386 int vm86_active;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300387 ulong save_rflags;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300388 struct kvm_save_segment {
389 u16 selector;
390 unsigned long base;
391 u32 limit;
392 u32 ar;
393 } tr, es, ds, fs, gs;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200394 } rmode;
Avi Kivity2fb92db2011-04-27 19:42:18 +0300395 struct {
396 u32 bitmask; /* 4 bits per segment (1 bit per field) */
397 struct kvm_save_segment seg[8];
398 } segment_cache;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800399 int vpid;
Mohammed Gamal04fa4d32008-08-17 16:39:48 +0300400 bool emulation_required;
Jan Kiszka3b86cd92008-09-26 09:30:57 +0200401
402 /* Support for vnmi-less CPUs */
403 int soft_vnmi_blocked;
404 ktime_t entry_time;
405 s64 vnmi_blocked_time;
Andi Kleena0861c02009-06-08 17:37:09 +0800406 u32 exit_reason;
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800407
408 bool rdtscp_enabled;
Nadav Har'Elec378ae2011-05-25 23:02:54 +0300409
410 /* Support for a guest hypervisor (nested VMX) */
411 struct nested_vmx nested;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400412};
413
Avi Kivity2fb92db2011-04-27 19:42:18 +0300414enum segment_cache_field {
415 SEG_FIELD_SEL = 0,
416 SEG_FIELD_BASE = 1,
417 SEG_FIELD_LIMIT = 2,
418 SEG_FIELD_AR = 3,
419
420 SEG_FIELD_NR = 4
421};
422
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400423static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
424{
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000425 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400426}
427
Nadav Har'El22bd0352011-05-25 23:05:57 +0300428#define VMCS12_OFFSET(x) offsetof(struct vmcs12, x)
429#define FIELD(number, name) [number] = VMCS12_OFFSET(name)
430#define FIELD64(number, name) [number] = VMCS12_OFFSET(name), \
431 [number##_HIGH] = VMCS12_OFFSET(name)+4
432
433static unsigned short vmcs_field_to_offset_table[] = {
434 FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id),
435 FIELD(GUEST_ES_SELECTOR, guest_es_selector),
436 FIELD(GUEST_CS_SELECTOR, guest_cs_selector),
437 FIELD(GUEST_SS_SELECTOR, guest_ss_selector),
438 FIELD(GUEST_DS_SELECTOR, guest_ds_selector),
439 FIELD(GUEST_FS_SELECTOR, guest_fs_selector),
440 FIELD(GUEST_GS_SELECTOR, guest_gs_selector),
441 FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector),
442 FIELD(GUEST_TR_SELECTOR, guest_tr_selector),
443 FIELD(HOST_ES_SELECTOR, host_es_selector),
444 FIELD(HOST_CS_SELECTOR, host_cs_selector),
445 FIELD(HOST_SS_SELECTOR, host_ss_selector),
446 FIELD(HOST_DS_SELECTOR, host_ds_selector),
447 FIELD(HOST_FS_SELECTOR, host_fs_selector),
448 FIELD(HOST_GS_SELECTOR, host_gs_selector),
449 FIELD(HOST_TR_SELECTOR, host_tr_selector),
450 FIELD64(IO_BITMAP_A, io_bitmap_a),
451 FIELD64(IO_BITMAP_B, io_bitmap_b),
452 FIELD64(MSR_BITMAP, msr_bitmap),
453 FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr),
454 FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr),
455 FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr),
456 FIELD64(TSC_OFFSET, tsc_offset),
457 FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr),
458 FIELD64(APIC_ACCESS_ADDR, apic_access_addr),
459 FIELD64(EPT_POINTER, ept_pointer),
460 FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address),
461 FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer),
462 FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl),
463 FIELD64(GUEST_IA32_PAT, guest_ia32_pat),
464 FIELD64(GUEST_IA32_EFER, guest_ia32_efer),
465 FIELD64(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl),
466 FIELD64(GUEST_PDPTR0, guest_pdptr0),
467 FIELD64(GUEST_PDPTR1, guest_pdptr1),
468 FIELD64(GUEST_PDPTR2, guest_pdptr2),
469 FIELD64(GUEST_PDPTR3, guest_pdptr3),
470 FIELD64(HOST_IA32_PAT, host_ia32_pat),
471 FIELD64(HOST_IA32_EFER, host_ia32_efer),
472 FIELD64(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl),
473 FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control),
474 FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control),
475 FIELD(EXCEPTION_BITMAP, exception_bitmap),
476 FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask),
477 FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match),
478 FIELD(CR3_TARGET_COUNT, cr3_target_count),
479 FIELD(VM_EXIT_CONTROLS, vm_exit_controls),
480 FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count),
481 FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count),
482 FIELD(VM_ENTRY_CONTROLS, vm_entry_controls),
483 FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count),
484 FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field),
485 FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code),
486 FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len),
487 FIELD(TPR_THRESHOLD, tpr_threshold),
488 FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control),
489 FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error),
490 FIELD(VM_EXIT_REASON, vm_exit_reason),
491 FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info),
492 FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code),
493 FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field),
494 FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code),
495 FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len),
496 FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info),
497 FIELD(GUEST_ES_LIMIT, guest_es_limit),
498 FIELD(GUEST_CS_LIMIT, guest_cs_limit),
499 FIELD(GUEST_SS_LIMIT, guest_ss_limit),
500 FIELD(GUEST_DS_LIMIT, guest_ds_limit),
501 FIELD(GUEST_FS_LIMIT, guest_fs_limit),
502 FIELD(GUEST_GS_LIMIT, guest_gs_limit),
503 FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit),
504 FIELD(GUEST_TR_LIMIT, guest_tr_limit),
505 FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit),
506 FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit),
507 FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes),
508 FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes),
509 FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes),
510 FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes),
511 FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes),
512 FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes),
513 FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes),
514 FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes),
515 FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info),
516 FIELD(GUEST_ACTIVITY_STATE, guest_activity_state),
517 FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs),
518 FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs),
519 FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask),
520 FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask),
521 FIELD(CR0_READ_SHADOW, cr0_read_shadow),
522 FIELD(CR4_READ_SHADOW, cr4_read_shadow),
523 FIELD(CR3_TARGET_VALUE0, cr3_target_value0),
524 FIELD(CR3_TARGET_VALUE1, cr3_target_value1),
525 FIELD(CR3_TARGET_VALUE2, cr3_target_value2),
526 FIELD(CR3_TARGET_VALUE3, cr3_target_value3),
527 FIELD(EXIT_QUALIFICATION, exit_qualification),
528 FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address),
529 FIELD(GUEST_CR0, guest_cr0),
530 FIELD(GUEST_CR3, guest_cr3),
531 FIELD(GUEST_CR4, guest_cr4),
532 FIELD(GUEST_ES_BASE, guest_es_base),
533 FIELD(GUEST_CS_BASE, guest_cs_base),
534 FIELD(GUEST_SS_BASE, guest_ss_base),
535 FIELD(GUEST_DS_BASE, guest_ds_base),
536 FIELD(GUEST_FS_BASE, guest_fs_base),
537 FIELD(GUEST_GS_BASE, guest_gs_base),
538 FIELD(GUEST_LDTR_BASE, guest_ldtr_base),
539 FIELD(GUEST_TR_BASE, guest_tr_base),
540 FIELD(GUEST_GDTR_BASE, guest_gdtr_base),
541 FIELD(GUEST_IDTR_BASE, guest_idtr_base),
542 FIELD(GUEST_DR7, guest_dr7),
543 FIELD(GUEST_RSP, guest_rsp),
544 FIELD(GUEST_RIP, guest_rip),
545 FIELD(GUEST_RFLAGS, guest_rflags),
546 FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions),
547 FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp),
548 FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip),
549 FIELD(HOST_CR0, host_cr0),
550 FIELD(HOST_CR3, host_cr3),
551 FIELD(HOST_CR4, host_cr4),
552 FIELD(HOST_FS_BASE, host_fs_base),
553 FIELD(HOST_GS_BASE, host_gs_base),
554 FIELD(HOST_TR_BASE, host_tr_base),
555 FIELD(HOST_GDTR_BASE, host_gdtr_base),
556 FIELD(HOST_IDTR_BASE, host_idtr_base),
557 FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp),
558 FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip),
559 FIELD(HOST_RSP, host_rsp),
560 FIELD(HOST_RIP, host_rip),
561};
562static const int max_vmcs_field = ARRAY_SIZE(vmcs_field_to_offset_table);
563
564static inline short vmcs_field_to_offset(unsigned long field)
565{
566 if (field >= max_vmcs_field || vmcs_field_to_offset_table[field] == 0)
567 return -1;
568 return vmcs_field_to_offset_table[field];
569}
570
Nadav Har'Ela9d30f32011-05-25 23:03:55 +0300571static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu)
572{
573 return to_vmx(vcpu)->nested.current_vmcs12;
574}
575
576static struct page *nested_get_page(struct kvm_vcpu *vcpu, gpa_t addr)
577{
578 struct page *page = gfn_to_page(vcpu->kvm, addr >> PAGE_SHIFT);
579 if (is_error_page(page)) {
580 kvm_release_page_clean(page);
581 return NULL;
582 }
583 return page;
584}
585
586static void nested_release_page(struct page *page)
587{
588 kvm_release_page_dirty(page);
589}
590
591static void nested_release_page_clean(struct page *page)
592{
593 kvm_release_page_clean(page);
594}
595
Sheng Yang4e1096d2008-07-06 19:16:51 +0800596static u64 construct_eptp(unsigned long root_hpa);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800597static void kvm_cpu_vmxon(u64 addr);
598static void kvm_cpu_vmxoff(void);
Avi Kivityaff48ba2010-12-05 18:56:11 +0200599static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
Gleb Natapov776e58e2011-03-13 12:34:27 +0200600static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr);
Avi Kivity75880a02007-06-20 11:20:04 +0300601
Avi Kivity6aa8b732006-12-10 02:21:36 -0800602static DEFINE_PER_CPU(struct vmcs *, vmxarea);
603static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
Nadav Har'Eld462b812011-05-24 15:26:10 +0300604/*
605 * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed
606 * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it.
607 */
608static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu);
Avi Kivity3444d7d2010-07-26 18:32:38 +0300609static DEFINE_PER_CPU(struct desc_ptr, host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800610
Avi Kivity3e7c73e2009-02-24 21:46:19 +0200611static unsigned long *vmx_io_bitmap_a;
612static unsigned long *vmx_io_bitmap_b;
Avi Kivity58972972009-02-24 22:26:47 +0200613static unsigned long *vmx_msr_bitmap_legacy;
614static unsigned long *vmx_msr_bitmap_longmode;
He, Qingfdef3ad2007-04-30 09:45:24 +0300615
Avi Kivity110312c2010-12-21 12:54:20 +0200616static bool cpu_has_load_ia32_efer;
617
Sheng Yang2384d2b2008-01-17 15:14:33 +0800618static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
619static DEFINE_SPINLOCK(vmx_vpid_lock);
620
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300621static struct vmcs_config {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800622 int size;
623 int order;
624 u32 revision_id;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300625 u32 pin_based_exec_ctrl;
626 u32 cpu_based_exec_ctrl;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800627 u32 cpu_based_2nd_exec_ctrl;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300628 u32 vmexit_ctrl;
629 u32 vmentry_ctrl;
630} vmcs_config;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800631
Hannes Ederefff9e52008-11-28 17:02:06 +0100632static struct vmx_capability {
Sheng Yangd56f5462008-04-25 10:13:16 +0800633 u32 ept;
634 u32 vpid;
635} vmx_capability;
636
Avi Kivity6aa8b732006-12-10 02:21:36 -0800637#define VMX_SEGMENT_FIELD(seg) \
638 [VCPU_SREG_##seg] = { \
639 .selector = GUEST_##seg##_SELECTOR, \
640 .base = GUEST_##seg##_BASE, \
641 .limit = GUEST_##seg##_LIMIT, \
642 .ar_bytes = GUEST_##seg##_AR_BYTES, \
643 }
644
645static struct kvm_vmx_segment_field {
646 unsigned selector;
647 unsigned base;
648 unsigned limit;
649 unsigned ar_bytes;
650} kvm_vmx_segment_fields[] = {
651 VMX_SEGMENT_FIELD(CS),
652 VMX_SEGMENT_FIELD(DS),
653 VMX_SEGMENT_FIELD(ES),
654 VMX_SEGMENT_FIELD(FS),
655 VMX_SEGMENT_FIELD(GS),
656 VMX_SEGMENT_FIELD(SS),
657 VMX_SEGMENT_FIELD(TR),
658 VMX_SEGMENT_FIELD(LDTR),
659};
660
Avi Kivity26bb0982009-09-07 11:14:12 +0300661static u64 host_efer;
662
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300663static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
664
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300665/*
Brian Gerst8c065852010-07-17 09:03:26 -0400666 * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300667 * away by decrementing the array size.
668 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800669static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800670#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300671 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800672#endif
Brian Gerst8c065852010-07-17 09:03:26 -0400673 MSR_EFER, MSR_TSC_AUX, MSR_STAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800674};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200675#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800676
Gui Jianfeng31299942010-03-15 17:29:09 +0800677static inline bool is_page_fault(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800678{
679 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
680 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100681 (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800682}
683
Gui Jianfeng31299942010-03-15 17:29:09 +0800684static inline bool is_no_device(u32 intr_info)
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300685{
686 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
687 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100688 (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300689}
690
Gui Jianfeng31299942010-03-15 17:29:09 +0800691static inline bool is_invalid_opcode(u32 intr_info)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500692{
693 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
694 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100695 (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500696}
697
Gui Jianfeng31299942010-03-15 17:29:09 +0800698static inline bool is_external_interrupt(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800699{
700 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
701 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
702}
703
Gui Jianfeng31299942010-03-15 17:29:09 +0800704static inline bool is_machine_check(u32 intr_info)
Andi Kleena0861c02009-06-08 17:37:09 +0800705{
706 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
707 INTR_INFO_VALID_MASK)) ==
708 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
709}
710
Gui Jianfeng31299942010-03-15 17:29:09 +0800711static inline bool cpu_has_vmx_msr_bitmap(void)
Sheng Yang25c5f222008-03-28 13:18:56 +0800712{
Sheng Yang04547152009-04-01 15:52:31 +0800713 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS;
Sheng Yang25c5f222008-03-28 13:18:56 +0800714}
715
Gui Jianfeng31299942010-03-15 17:29:09 +0800716static inline bool cpu_has_vmx_tpr_shadow(void)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800717{
Sheng Yang04547152009-04-01 15:52:31 +0800718 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW;
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800719}
720
Gui Jianfeng31299942010-03-15 17:29:09 +0800721static inline bool vm_need_tpr_shadow(struct kvm *kvm)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800722{
Sheng Yang04547152009-04-01 15:52:31 +0800723 return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm));
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800724}
725
Gui Jianfeng31299942010-03-15 17:29:09 +0800726static inline bool cpu_has_secondary_exec_ctrls(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800727{
Sheng Yang04547152009-04-01 15:52:31 +0800728 return vmcs_config.cpu_based_exec_ctrl &
729 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800730}
731
Avi Kivity774ead32007-12-26 13:57:04 +0200732static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800733{
Sheng Yang04547152009-04-01 15:52:31 +0800734 return vmcs_config.cpu_based_2nd_exec_ctrl &
735 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
736}
737
738static inline bool cpu_has_vmx_flexpriority(void)
739{
740 return cpu_has_vmx_tpr_shadow() &&
741 cpu_has_vmx_virtualize_apic_accesses();
Sheng Yangf78e0e22007-10-29 09:40:42 +0800742}
743
Marcelo Tosattie7997942009-06-11 12:07:40 -0300744static inline bool cpu_has_vmx_ept_execute_only(void)
745{
Gui Jianfeng31299942010-03-15 17:29:09 +0800746 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300747}
748
749static inline bool cpu_has_vmx_eptp_uncacheable(void)
750{
Gui Jianfeng31299942010-03-15 17:29:09 +0800751 return vmx_capability.ept & VMX_EPTP_UC_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300752}
753
754static inline bool cpu_has_vmx_eptp_writeback(void)
755{
Gui Jianfeng31299942010-03-15 17:29:09 +0800756 return vmx_capability.ept & VMX_EPTP_WB_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300757}
758
759static inline bool cpu_has_vmx_ept_2m_page(void)
760{
Gui Jianfeng31299942010-03-15 17:29:09 +0800761 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300762}
763
Sheng Yang878403b2010-01-05 19:02:29 +0800764static inline bool cpu_has_vmx_ept_1g_page(void)
765{
Gui Jianfeng31299942010-03-15 17:29:09 +0800766 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;
Sheng Yang878403b2010-01-05 19:02:29 +0800767}
768
Sheng Yang4bc9b982010-06-02 14:05:24 +0800769static inline bool cpu_has_vmx_ept_4levels(void)
770{
771 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT;
772}
773
Gui Jianfeng31299942010-03-15 17:29:09 +0800774static inline bool cpu_has_vmx_invept_individual_addr(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800775{
Gui Jianfeng31299942010-03-15 17:29:09 +0800776 return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800777}
778
Gui Jianfeng31299942010-03-15 17:29:09 +0800779static inline bool cpu_has_vmx_invept_context(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800780{
Gui Jianfeng31299942010-03-15 17:29:09 +0800781 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800782}
783
Gui Jianfeng31299942010-03-15 17:29:09 +0800784static inline bool cpu_has_vmx_invept_global(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800785{
Gui Jianfeng31299942010-03-15 17:29:09 +0800786 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800787}
788
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800789static inline bool cpu_has_vmx_invvpid_single(void)
790{
791 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
792}
793
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800794static inline bool cpu_has_vmx_invvpid_global(void)
795{
796 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT;
797}
798
Gui Jianfeng31299942010-03-15 17:29:09 +0800799static inline bool cpu_has_vmx_ept(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800800{
Sheng Yang04547152009-04-01 15:52:31 +0800801 return vmcs_config.cpu_based_2nd_exec_ctrl &
802 SECONDARY_EXEC_ENABLE_EPT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800803}
804
Gui Jianfeng31299942010-03-15 17:29:09 +0800805static inline bool cpu_has_vmx_unrestricted_guest(void)
Nitin A Kamble3a624e22009-06-08 11:34:16 -0700806{
807 return vmcs_config.cpu_based_2nd_exec_ctrl &
808 SECONDARY_EXEC_UNRESTRICTED_GUEST;
809}
810
Gui Jianfeng31299942010-03-15 17:29:09 +0800811static inline bool cpu_has_vmx_ple(void)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800812{
813 return vmcs_config.cpu_based_2nd_exec_ctrl &
814 SECONDARY_EXEC_PAUSE_LOOP_EXITING;
815}
816
Gui Jianfeng31299942010-03-15 17:29:09 +0800817static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800818{
Gui Jianfeng6d3e4352010-01-29 15:36:59 +0800819 return flexpriority_enabled && irqchip_in_kernel(kvm);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800820}
821
Gui Jianfeng31299942010-03-15 17:29:09 +0800822static inline bool cpu_has_vmx_vpid(void)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800823{
Sheng Yang04547152009-04-01 15:52:31 +0800824 return vmcs_config.cpu_based_2nd_exec_ctrl &
825 SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800826}
827
Gui Jianfeng31299942010-03-15 17:29:09 +0800828static inline bool cpu_has_vmx_rdtscp(void)
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800829{
830 return vmcs_config.cpu_based_2nd_exec_ctrl &
831 SECONDARY_EXEC_RDTSCP;
832}
833
Gui Jianfeng31299942010-03-15 17:29:09 +0800834static inline bool cpu_has_virtual_nmis(void)
Sheng Yangf08864b2008-05-15 18:23:25 +0800835{
836 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
837}
838
Sheng Yangf5f48ee2010-06-30 12:25:15 +0800839static inline bool cpu_has_vmx_wbinvd_exit(void)
840{
841 return vmcs_config.cpu_based_2nd_exec_ctrl &
842 SECONDARY_EXEC_WBINVD_EXITING;
843}
844
Sheng Yang04547152009-04-01 15:52:31 +0800845static inline bool report_flexpriority(void)
846{
847 return flexpriority_enabled;
848}
849
Rusty Russell8b9cf982007-07-30 16:31:43 +1000850static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800851{
852 int i;
853
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400854 for (i = 0; i < vmx->nmsrs; ++i)
Avi Kivity26bb0982009-09-07 11:14:12 +0300855 if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300856 return i;
857 return -1;
858}
859
Sheng Yang2384d2b2008-01-17 15:14:33 +0800860static inline void __invvpid(int ext, u16 vpid, gva_t gva)
861{
862 struct {
863 u64 vpid : 16;
864 u64 rsvd : 48;
865 u64 gva;
866 } operand = { vpid, 0, gva };
867
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300868 asm volatile (__ex(ASM_VMX_INVVPID)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800869 /* CF==1 or ZF==1 --> rc = -1 */
870 "; ja 1f ; ud2 ; 1:"
871 : : "a"(&operand), "c"(ext) : "cc", "memory");
872}
873
Sheng Yang14394422008-04-28 12:24:45 +0800874static inline void __invept(int ext, u64 eptp, gpa_t gpa)
875{
876 struct {
877 u64 eptp, gpa;
878 } operand = {eptp, gpa};
879
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300880 asm volatile (__ex(ASM_VMX_INVEPT)
Sheng Yang14394422008-04-28 12:24:45 +0800881 /* CF==1 or ZF==1 --> rc = -1 */
882 "; ja 1f ; ud2 ; 1:\n"
883 : : "a" (&operand), "c" (ext) : "cc", "memory");
884}
885
Avi Kivity26bb0982009-09-07 11:14:12 +0300886static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300887{
888 int i;
889
Rusty Russell8b9cf982007-07-30 16:31:43 +1000890 i = __find_msr_index(vmx, msr);
Eddie Donga75beee2007-05-17 18:55:15 +0300891 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400892 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000893 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800894}
895
Avi Kivity6aa8b732006-12-10 02:21:36 -0800896static void vmcs_clear(struct vmcs *vmcs)
897{
898 u64 phys_addr = __pa(vmcs);
899 u8 error;
900
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300901 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
Avi Kivity16d8f722010-12-21 16:51:50 +0200902 : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800903 : "cc", "memory");
904 if (error)
905 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
906 vmcs, phys_addr);
907}
908
Nadav Har'Eld462b812011-05-24 15:26:10 +0300909static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs)
910{
911 vmcs_clear(loaded_vmcs->vmcs);
912 loaded_vmcs->cpu = -1;
913 loaded_vmcs->launched = 0;
914}
915
Dongxiao Xu7725b892010-05-11 18:29:38 +0800916static void vmcs_load(struct vmcs *vmcs)
917{
918 u64 phys_addr = __pa(vmcs);
919 u8 error;
920
921 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
Avi Kivity16d8f722010-12-21 16:51:50 +0200922 : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
Dongxiao Xu7725b892010-05-11 18:29:38 +0800923 : "cc", "memory");
924 if (error)
925 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
926 vmcs, phys_addr);
927}
928
Nadav Har'Eld462b812011-05-24 15:26:10 +0300929static void __loaded_vmcs_clear(void *arg)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800930{
Nadav Har'Eld462b812011-05-24 15:26:10 +0300931 struct loaded_vmcs *loaded_vmcs = arg;
Ingo Molnard3b2c332007-01-05 16:36:23 -0800932 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800933
Nadav Har'Eld462b812011-05-24 15:26:10 +0300934 if (loaded_vmcs->cpu != cpu)
935 return; /* vcpu migration can race with cpu offline */
936 if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800937 per_cpu(current_vmcs, cpu) = NULL;
Nadav Har'Eld462b812011-05-24 15:26:10 +0300938 list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link);
939 loaded_vmcs_init(loaded_vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800940}
941
Nadav Har'Eld462b812011-05-24 15:26:10 +0300942static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs)
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800943{
Nadav Har'Eld462b812011-05-24 15:26:10 +0300944 if (loaded_vmcs->cpu != -1)
945 smp_call_function_single(
946 loaded_vmcs->cpu, __loaded_vmcs_clear, loaded_vmcs, 1);
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800947}
948
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800949static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800950{
951 if (vmx->vpid == 0)
952 return;
953
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800954 if (cpu_has_vmx_invvpid_single())
955 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
Sheng Yang2384d2b2008-01-17 15:14:33 +0800956}
957
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800958static inline void vpid_sync_vcpu_global(void)
959{
960 if (cpu_has_vmx_invvpid_global())
961 __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
962}
963
964static inline void vpid_sync_context(struct vcpu_vmx *vmx)
965{
966 if (cpu_has_vmx_invvpid_single())
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800967 vpid_sync_vcpu_single(vmx);
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800968 else
969 vpid_sync_vcpu_global();
970}
971
Sheng Yang14394422008-04-28 12:24:45 +0800972static inline void ept_sync_global(void)
973{
974 if (cpu_has_vmx_invept_global())
975 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
976}
977
978static inline void ept_sync_context(u64 eptp)
979{
Avi Kivity089d0342009-03-23 18:26:32 +0200980 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800981 if (cpu_has_vmx_invept_context())
982 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
983 else
984 ept_sync_global();
985 }
986}
987
988static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
989{
Avi Kivity089d0342009-03-23 18:26:32 +0200990 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800991 if (cpu_has_vmx_invept_individual_addr())
992 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
993 eptp, gpa);
994 else
995 ept_sync_context(eptp);
996 }
997}
998
Avi Kivity96304212011-05-15 10:13:13 -0400999static __always_inline unsigned long vmcs_readl(unsigned long field)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001000{
Avi Kivity5e520e62011-05-15 10:13:12 -04001001 unsigned long value;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001002
Avi Kivity5e520e62011-05-15 10:13:12 -04001003 asm volatile (__ex_clear(ASM_VMX_VMREAD_RDX_RAX, "%0")
1004 : "=a"(value) : "d"(field) : "cc");
Avi Kivity6aa8b732006-12-10 02:21:36 -08001005 return value;
1006}
1007
Avi Kivity96304212011-05-15 10:13:13 -04001008static __always_inline u16 vmcs_read16(unsigned long field)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001009{
1010 return vmcs_readl(field);
1011}
1012
Avi Kivity96304212011-05-15 10:13:13 -04001013static __always_inline u32 vmcs_read32(unsigned long field)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001014{
1015 return vmcs_readl(field);
1016}
1017
Avi Kivity96304212011-05-15 10:13:13 -04001018static __always_inline u64 vmcs_read64(unsigned long field)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001019{
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001020#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001021 return vmcs_readl(field);
1022#else
1023 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
1024#endif
1025}
1026
Avi Kivitye52de1b2007-01-05 16:36:56 -08001027static noinline void vmwrite_error(unsigned long field, unsigned long value)
1028{
1029 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
1030 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
1031 dump_stack();
1032}
1033
Avi Kivity6aa8b732006-12-10 02:21:36 -08001034static void vmcs_writel(unsigned long field, unsigned long value)
1035{
1036 u8 error;
1037
Avi Kivity4ecac3f2008-05-13 13:23:38 +03001038 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
Mike Dayd77c26f2007-10-08 09:02:08 -04001039 : "=q"(error) : "a"(value), "d"(field) : "cc");
Avi Kivitye52de1b2007-01-05 16:36:56 -08001040 if (unlikely(error))
1041 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001042}
1043
1044static void vmcs_write16(unsigned long field, u16 value)
1045{
1046 vmcs_writel(field, value);
1047}
1048
1049static void vmcs_write32(unsigned long field, u32 value)
1050{
1051 vmcs_writel(field, value);
1052}
1053
1054static void vmcs_write64(unsigned long field, u64 value)
1055{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001056 vmcs_writel(field, value);
Avi Kivity7682f2d2008-05-12 19:25:43 +03001057#ifndef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001058 asm volatile ("");
1059 vmcs_writel(field+1, value >> 32);
1060#endif
1061}
1062
Anthony Liguori2ab455c2007-04-27 09:29:49 +03001063static void vmcs_clear_bits(unsigned long field, u32 mask)
1064{
1065 vmcs_writel(field, vmcs_readl(field) & ~mask);
1066}
1067
1068static void vmcs_set_bits(unsigned long field, u32 mask)
1069{
1070 vmcs_writel(field, vmcs_readl(field) | mask);
1071}
1072
Avi Kivity2fb92db2011-04-27 19:42:18 +03001073static void vmx_segment_cache_clear(struct vcpu_vmx *vmx)
1074{
1075 vmx->segment_cache.bitmask = 0;
1076}
1077
1078static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg,
1079 unsigned field)
1080{
1081 bool ret;
1082 u32 mask = 1 << (seg * SEG_FIELD_NR + field);
1083
1084 if (!(vmx->vcpu.arch.regs_avail & (1 << VCPU_EXREG_SEGMENTS))) {
1085 vmx->vcpu.arch.regs_avail |= (1 << VCPU_EXREG_SEGMENTS);
1086 vmx->segment_cache.bitmask = 0;
1087 }
1088 ret = vmx->segment_cache.bitmask & mask;
1089 vmx->segment_cache.bitmask |= mask;
1090 return ret;
1091}
1092
1093static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg)
1094{
1095 u16 *p = &vmx->segment_cache.seg[seg].selector;
1096
1097 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL))
1098 *p = vmcs_read16(kvm_vmx_segment_fields[seg].selector);
1099 return *p;
1100}
1101
1102static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg)
1103{
1104 ulong *p = &vmx->segment_cache.seg[seg].base;
1105
1106 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE))
1107 *p = vmcs_readl(kvm_vmx_segment_fields[seg].base);
1108 return *p;
1109}
1110
1111static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg)
1112{
1113 u32 *p = &vmx->segment_cache.seg[seg].limit;
1114
1115 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT))
1116 *p = vmcs_read32(kvm_vmx_segment_fields[seg].limit);
1117 return *p;
1118}
1119
1120static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg)
1121{
1122 u32 *p = &vmx->segment_cache.seg[seg].ar;
1123
1124 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR))
1125 *p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes);
1126 return *p;
1127}
1128
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001129static void update_exception_bitmap(struct kvm_vcpu *vcpu)
1130{
1131 u32 eb;
1132
Jan Kiszkafd7373c2010-01-20 18:20:20 +01001133 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
1134 (1u << NM_VECTOR) | (1u << DB_VECTOR);
1135 if ((vcpu->guest_debug &
1136 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
1137 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
1138 eb |= 1u << BP_VECTOR;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001139 if (to_vmx(vcpu)->rmode.vm86_active)
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001140 eb = ~0;
Avi Kivity089d0342009-03-23 18:26:32 +02001141 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08001142 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
Avi Kivity02daab22009-12-30 12:40:26 +02001143 if (vcpu->fpu_active)
1144 eb &= ~(1u << NM_VECTOR);
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001145 vmcs_write32(EXCEPTION_BITMAP, eb);
1146}
1147
Avi Kivity61d2ef22010-04-28 16:40:38 +03001148static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
1149{
1150 unsigned i;
1151 struct msr_autoload *m = &vmx->msr_autoload;
1152
Avi Kivity110312c2010-12-21 12:54:20 +02001153 if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
1154 vmcs_clear_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
1155 vmcs_clear_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
1156 return;
1157 }
1158
Avi Kivity61d2ef22010-04-28 16:40:38 +03001159 for (i = 0; i < m->nr; ++i)
1160 if (m->guest[i].index == msr)
1161 break;
1162
1163 if (i == m->nr)
1164 return;
1165 --m->nr;
1166 m->guest[i] = m->guest[m->nr];
1167 m->host[i] = m->host[m->nr];
1168 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
1169 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
1170}
1171
1172static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
1173 u64 guest_val, u64 host_val)
1174{
1175 unsigned i;
1176 struct msr_autoload *m = &vmx->msr_autoload;
1177
Avi Kivity110312c2010-12-21 12:54:20 +02001178 if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
1179 vmcs_write64(GUEST_IA32_EFER, guest_val);
1180 vmcs_write64(HOST_IA32_EFER, host_val);
1181 vmcs_set_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
1182 vmcs_set_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
1183 return;
1184 }
1185
Avi Kivity61d2ef22010-04-28 16:40:38 +03001186 for (i = 0; i < m->nr; ++i)
1187 if (m->guest[i].index == msr)
1188 break;
1189
1190 if (i == m->nr) {
1191 ++m->nr;
1192 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
1193 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
1194 }
1195
1196 m->guest[i].index = msr;
1197 m->guest[i].value = guest_val;
1198 m->host[i].index = msr;
1199 m->host[i].value = host_val;
1200}
1201
Avi Kivity33ed6322007-05-02 16:54:03 +03001202static void reload_tss(void)
1203{
Avi Kivity33ed6322007-05-02 16:54:03 +03001204 /*
1205 * VT restores TR but not its size. Useless.
1206 */
Avi Kivityd3591922010-07-26 18:32:39 +03001207 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivitya5f61302008-02-20 17:57:21 +02001208 struct desc_struct *descs;
Avi Kivity33ed6322007-05-02 16:54:03 +03001209
Avi Kivityd3591922010-07-26 18:32:39 +03001210 descs = (void *)gdt->address;
Avi Kivity33ed6322007-05-02 16:54:03 +03001211 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
1212 load_TR_desc();
Avi Kivity33ed6322007-05-02 16:54:03 +03001213}
1214
Avi Kivity92c0d902009-10-29 11:00:16 +02001215static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
Eddie Dong2cc51562007-05-21 07:28:09 +03001216{
Roel Kluin3a34a882009-08-04 02:08:45 -07001217 u64 guest_efer;
Avi Kivity51c6cf62007-08-29 03:48:05 +03001218 u64 ignore_bits;
Eddie Dong2cc51562007-05-21 07:28:09 +03001219
Avi Kivityf6801df2010-01-21 15:31:50 +02001220 guest_efer = vmx->vcpu.arch.efer;
Roel Kluin3a34a882009-08-04 02:08:45 -07001221
Avi Kivity51c6cf62007-08-29 03:48:05 +03001222 /*
1223 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
1224 * outside long mode
1225 */
1226 ignore_bits = EFER_NX | EFER_SCE;
1227#ifdef CONFIG_X86_64
1228 ignore_bits |= EFER_LMA | EFER_LME;
1229 /* SCE is meaningful only in long mode on Intel */
1230 if (guest_efer & EFER_LMA)
1231 ignore_bits &= ~(u64)EFER_SCE;
1232#endif
Avi Kivity51c6cf62007-08-29 03:48:05 +03001233 guest_efer &= ~ignore_bits;
1234 guest_efer |= host_efer & ignore_bits;
Avi Kivity26bb0982009-09-07 11:14:12 +03001235 vmx->guest_msrs[efer_offset].data = guest_efer;
Avi Kivityd5696722009-12-02 12:28:47 +02001236 vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
Avi Kivity84ad33e2010-04-28 16:42:29 +03001237
1238 clear_atomic_switch_msr(vmx, MSR_EFER);
1239 /* On ept, can't emulate nx, and must switch nx atomically */
1240 if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) {
1241 guest_efer = vmx->vcpu.arch.efer;
1242 if (!(guest_efer & EFER_LMA))
1243 guest_efer &= ~EFER_LME;
1244 add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer);
1245 return false;
1246 }
1247
Avi Kivity26bb0982009-09-07 11:14:12 +03001248 return true;
Avi Kivity51c6cf62007-08-29 03:48:05 +03001249}
1250
Gleb Natapov2d49ec72010-02-25 12:43:09 +02001251static unsigned long segment_base(u16 selector)
1252{
Avi Kivityd3591922010-07-26 18:32:39 +03001253 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Gleb Natapov2d49ec72010-02-25 12:43:09 +02001254 struct desc_struct *d;
1255 unsigned long table_base;
1256 unsigned long v;
1257
1258 if (!(selector & ~3))
1259 return 0;
1260
Avi Kivityd3591922010-07-26 18:32:39 +03001261 table_base = gdt->address;
Gleb Natapov2d49ec72010-02-25 12:43:09 +02001262
1263 if (selector & 4) { /* from ldt */
1264 u16 ldt_selector = kvm_read_ldt();
1265
1266 if (!(ldt_selector & ~3))
1267 return 0;
1268
1269 table_base = segment_base(ldt_selector);
1270 }
1271 d = (struct desc_struct *)(table_base + (selector & ~7));
1272 v = get_desc_base(d);
1273#ifdef CONFIG_X86_64
1274 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
1275 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
1276#endif
1277 return v;
1278}
1279
1280static inline unsigned long kvm_read_tr_base(void)
1281{
1282 u16 tr;
1283 asm("str %0" : "=g"(tr));
1284 return segment_base(tr);
1285}
1286
Avi Kivity04d2cc72007-09-10 18:10:54 +03001287static void vmx_save_host_state(struct kvm_vcpu *vcpu)
Avi Kivity33ed6322007-05-02 16:54:03 +03001288{
Avi Kivity04d2cc72007-09-10 18:10:54 +03001289 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001290 int i;
Avi Kivity04d2cc72007-09-10 18:10:54 +03001291
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001292 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +03001293 return;
1294
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001295 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +03001296 /*
1297 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
1298 * allow segment selectors with cpl > 0 or ti == 1.
1299 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +03001300 vmx->host_state.ldt_sel = kvm_read_ldt();
Laurent Vivier152d3f22007-08-23 16:33:11 +02001301 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
Avi Kivity9581d442010-10-19 16:46:55 +02001302 savesegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +02001303 if (!(vmx->host_state.fs_sel & 7)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001304 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +02001305 vmx->host_state.fs_reload_needed = 0;
1306 } else {
Avi Kivity33ed6322007-05-02 16:54:03 +03001307 vmcs_write16(HOST_FS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +02001308 vmx->host_state.fs_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +03001309 }
Avi Kivity9581d442010-10-19 16:46:55 +02001310 savesegment(gs, vmx->host_state.gs_sel);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001311 if (!(vmx->host_state.gs_sel & 7))
1312 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +03001313 else {
1314 vmcs_write16(HOST_GS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +02001315 vmx->host_state.gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +03001316 }
1317
1318#ifdef CONFIG_X86_64
1319 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
1320 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
1321#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001322 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
1323 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +03001324#endif
Avi Kivity707c0872007-05-02 17:33:43 +03001325
1326#ifdef CONFIG_X86_64
Avi Kivityc8770e72010-11-11 12:37:26 +02001327 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
1328 if (is_long_mode(&vmx->vcpu))
Avi Kivity44ea2b12009-09-06 15:55:37 +03001329 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
Avi Kivity707c0872007-05-02 17:33:43 +03001330#endif
Avi Kivity26bb0982009-09-07 11:14:12 +03001331 for (i = 0; i < vmx->save_nmsrs; ++i)
1332 kvm_set_shared_msr(vmx->guest_msrs[i].index,
Avi Kivityd5696722009-12-02 12:28:47 +02001333 vmx->guest_msrs[i].data,
1334 vmx->guest_msrs[i].mask);
Avi Kivity33ed6322007-05-02 16:54:03 +03001335}
1336
Avi Kivitya9b21b62008-06-24 11:48:49 +03001337static void __vmx_load_host_state(struct vcpu_vmx *vmx)
Avi Kivity33ed6322007-05-02 16:54:03 +03001338{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001339 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +03001340 return;
1341
Avi Kivitye1beb1d2007-11-18 13:50:24 +02001342 ++vmx->vcpu.stat.host_state_reload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001343 vmx->host_state.loaded = 0;
Avi Kivityc8770e72010-11-11 12:37:26 +02001344#ifdef CONFIG_X86_64
1345 if (is_long_mode(&vmx->vcpu))
1346 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
1347#endif
Laurent Vivier152d3f22007-08-23 16:33:11 +02001348 if (vmx->host_state.gs_ldt_reload_needed) {
Avi Kivityd6e88ae2008-07-10 16:53:33 +03001349 kvm_load_ldt(vmx->host_state.ldt_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +03001350#ifdef CONFIG_X86_64
Avi Kivity9581d442010-10-19 16:46:55 +02001351 load_gs_index(vmx->host_state.gs_sel);
Avi Kivity9581d442010-10-19 16:46:55 +02001352#else
1353 loadsegment(gs, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +03001354#endif
Avi Kivity33ed6322007-05-02 16:54:03 +03001355 }
Avi Kivity0a77fe42010-10-19 18:48:35 +02001356 if (vmx->host_state.fs_reload_needed)
1357 loadsegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +02001358 reload_tss();
Avi Kivity44ea2b12009-09-06 15:55:37 +03001359#ifdef CONFIG_X86_64
Avi Kivityc8770e72010-11-11 12:37:26 +02001360 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
Avi Kivity44ea2b12009-09-06 15:55:37 +03001361#endif
Avi Kivity1c11e712010-05-03 16:05:44 +03001362 if (current_thread_info()->status & TS_USEDFPU)
1363 clts();
Avi Kivity3444d7d2010-07-26 18:32:38 +03001364 load_gdt(&__get_cpu_var(host_gdt));
Avi Kivity33ed6322007-05-02 16:54:03 +03001365}
1366
Avi Kivitya9b21b62008-06-24 11:48:49 +03001367static void vmx_load_host_state(struct vcpu_vmx *vmx)
1368{
1369 preempt_disable();
1370 __vmx_load_host_state(vmx);
1371 preempt_enable();
1372}
1373
Avi Kivity6aa8b732006-12-10 02:21:36 -08001374/*
1375 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
1376 * vcpu mutex is already taken.
1377 */
Avi Kivity15ad7142007-07-11 18:17:21 +03001378static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001379{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001380 struct vcpu_vmx *vmx = to_vmx(vcpu);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001381 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001382
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001383 if (!vmm_exclusive)
1384 kvm_cpu_vmxon(phys_addr);
Nadav Har'Eld462b812011-05-24 15:26:10 +03001385 else if (vmx->loaded_vmcs->cpu != cpu)
1386 loaded_vmcs_clear(vmx->loaded_vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001387
Nadav Har'Eld462b812011-05-24 15:26:10 +03001388 if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) {
1389 per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs;
1390 vmcs_load(vmx->loaded_vmcs->vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001391 }
1392
Nadav Har'Eld462b812011-05-24 15:26:10 +03001393 if (vmx->loaded_vmcs->cpu != cpu) {
Avi Kivityd3591922010-07-26 18:32:39 +03001394 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001395 unsigned long sysenter_esp;
1396
Avi Kivitya8eeb042010-05-10 12:34:53 +03001397 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
Dongxiao Xu92fe13b2010-05-11 18:29:42 +08001398 local_irq_disable();
Nadav Har'Eld462b812011-05-24 15:26:10 +03001399 list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link,
1400 &per_cpu(loaded_vmcss_on_cpu, cpu));
Dongxiao Xu92fe13b2010-05-11 18:29:42 +08001401 local_irq_enable();
1402
Avi Kivity6aa8b732006-12-10 02:21:36 -08001403 /*
1404 * Linux uses per-cpu TSS and GDT, so set these when switching
1405 * processors.
1406 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +03001407 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
Avi Kivityd3591922010-07-26 18:32:39 +03001408 vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001409
1410 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
1411 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
Nadav Har'Eld462b812011-05-24 15:26:10 +03001412 vmx->loaded_vmcs->cpu = cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001413 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001414}
1415
1416static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
1417{
Avi Kivitya9b21b62008-06-24 11:48:49 +03001418 __vmx_load_host_state(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001419 if (!vmm_exclusive) {
Nadav Har'Eld462b812011-05-24 15:26:10 +03001420 __loaded_vmcs_clear(to_vmx(vcpu)->loaded_vmcs);
1421 vcpu->cpu = -1;
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001422 kvm_cpu_vmxoff();
1423 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001424}
1425
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001426static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
1427{
Avi Kivity81231c62010-01-24 16:26:40 +02001428 ulong cr0;
1429
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001430 if (vcpu->fpu_active)
1431 return;
1432 vcpu->fpu_active = 1;
Avi Kivity81231c62010-01-24 16:26:40 +02001433 cr0 = vmcs_readl(GUEST_CR0);
1434 cr0 &= ~(X86_CR0_TS | X86_CR0_MP);
1435 cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP);
1436 vmcs_writel(GUEST_CR0, cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001437 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +02001438 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
1439 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001440}
1441
Avi Kivityedcafe32009-12-30 18:07:40 +02001442static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
1443
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001444static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
1445{
Avi Kivityedcafe32009-12-30 18:07:40 +02001446 vmx_decache_cr0_guest_bits(vcpu);
Avi Kivity81231c62010-01-24 16:26:40 +02001447 vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001448 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +02001449 vcpu->arch.cr0_guest_owned_bits = 0;
1450 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
1451 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +03001452}
1453
Avi Kivity6aa8b732006-12-10 02:21:36 -08001454static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
1455{
Avi Kivity78ac8b42010-04-08 18:19:35 +03001456 unsigned long rflags, save_rflags;
Avi Kivity345dcaa2009-08-12 15:29:37 +03001457
Avi Kivity6de12732011-03-07 12:51:22 +02001458 if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) {
1459 __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);
1460 rflags = vmcs_readl(GUEST_RFLAGS);
1461 if (to_vmx(vcpu)->rmode.vm86_active) {
1462 rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
1463 save_rflags = to_vmx(vcpu)->rmode.save_rflags;
1464 rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
1465 }
1466 to_vmx(vcpu)->rflags = rflags;
Avi Kivity78ac8b42010-04-08 18:19:35 +03001467 }
Avi Kivity6de12732011-03-07 12:51:22 +02001468 return to_vmx(vcpu)->rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001469}
1470
1471static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
1472{
Avi Kivity6de12732011-03-07 12:51:22 +02001473 __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);
Avi Kivity69c73022011-03-07 15:26:44 +02001474 __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
Avi Kivity6de12732011-03-07 12:51:22 +02001475 to_vmx(vcpu)->rflags = rflags;
Avi Kivity78ac8b42010-04-08 18:19:35 +03001476 if (to_vmx(vcpu)->rmode.vm86_active) {
1477 to_vmx(vcpu)->rmode.save_rflags = rflags;
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001478 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity78ac8b42010-04-08 18:19:35 +03001479 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001480 vmcs_writel(GUEST_RFLAGS, rflags);
1481}
1482
Glauber Costa2809f5d2009-05-12 16:21:05 -04001483static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
1484{
1485 u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1486 int ret = 0;
1487
1488 if (interruptibility & GUEST_INTR_STATE_STI)
Jan Kiszka48005f62010-02-19 19:38:07 +01001489 ret |= KVM_X86_SHADOW_INT_STI;
Glauber Costa2809f5d2009-05-12 16:21:05 -04001490 if (interruptibility & GUEST_INTR_STATE_MOV_SS)
Jan Kiszka48005f62010-02-19 19:38:07 +01001491 ret |= KVM_X86_SHADOW_INT_MOV_SS;
Glauber Costa2809f5d2009-05-12 16:21:05 -04001492
1493 return ret & mask;
1494}
1495
1496static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
1497{
1498 u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1499 u32 interruptibility = interruptibility_old;
1500
1501 interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
1502
Jan Kiszka48005f62010-02-19 19:38:07 +01001503 if (mask & KVM_X86_SHADOW_INT_MOV_SS)
Glauber Costa2809f5d2009-05-12 16:21:05 -04001504 interruptibility |= GUEST_INTR_STATE_MOV_SS;
Jan Kiszka48005f62010-02-19 19:38:07 +01001505 else if (mask & KVM_X86_SHADOW_INT_STI)
Glauber Costa2809f5d2009-05-12 16:21:05 -04001506 interruptibility |= GUEST_INTR_STATE_STI;
1507
1508 if ((interruptibility != interruptibility_old))
1509 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
1510}
1511
Avi Kivity6aa8b732006-12-10 02:21:36 -08001512static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
1513{
1514 unsigned long rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001515
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001516 rip = kvm_rip_read(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001517 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001518 kvm_rip_write(vcpu, rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001519
Glauber Costa2809f5d2009-05-12 16:21:05 -04001520 /* skipping an emulated instruction also counts */
1521 vmx_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001522}
1523
Anthony Liguori443381a2010-12-06 10:53:38 -06001524static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
1525{
1526 /* Ensure that we clear the HLT state in the VMCS. We don't need to
1527 * explicitly skip the instruction because if the HLT state is set, then
1528 * the instruction is already executing and RIP has already been
1529 * advanced. */
1530 if (!yield_on_hlt &&
1531 vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT)
1532 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
1533}
1534
Avi Kivity298101d2007-11-25 13:41:11 +02001535static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
Joerg Roedelce7ddec2010-04-22 12:33:13 +02001536 bool has_error_code, u32 error_code,
1537 bool reinject)
Avi Kivity298101d2007-11-25 13:41:11 +02001538{
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001539 struct vcpu_vmx *vmx = to_vmx(vcpu);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001540 u32 intr_info = nr | INTR_INFO_VALID_MASK;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001541
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001542 if (has_error_code) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001543 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001544 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
1545 }
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001546
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001547 if (vmx->rmode.vm86_active) {
Serge E. Hallyn71f98332011-04-13 09:12:54 -05001548 int inc_eip = 0;
1549 if (kvm_exception_is_soft(nr))
1550 inc_eip = vcpu->arch.event_exit_inst_len;
1551 if (kvm_inject_realmode_interrupt(vcpu, nr, inc_eip) != EMULATE_DONE)
Mohammed Gamala92601b2010-09-19 14:34:07 +02001552 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001553 return;
1554 }
1555
Gleb Natapov66fd3f72009-05-11 13:35:50 +03001556 if (kvm_exception_is_soft(nr)) {
1557 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
1558 vmx->vcpu.arch.event_exit_inst_len);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001559 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
1560 } else
1561 intr_info |= INTR_TYPE_HARD_EXCEPTION;
1562
1563 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
Anthony Liguori443381a2010-12-06 10:53:38 -06001564 vmx_clear_hlt(vcpu);
Avi Kivity298101d2007-11-25 13:41:11 +02001565}
1566
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001567static bool vmx_rdtscp_supported(void)
1568{
1569 return cpu_has_vmx_rdtscp();
1570}
1571
Avi Kivity6aa8b732006-12-10 02:21:36 -08001572/*
Eddie Donga75beee2007-05-17 18:55:15 +03001573 * Swap MSR entry in host/guest MSR entry array.
1574 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001575static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
Eddie Donga75beee2007-05-17 18:55:15 +03001576{
Avi Kivity26bb0982009-09-07 11:14:12 +03001577 struct shared_msr_entry tmp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001578
1579 tmp = vmx->guest_msrs[to];
1580 vmx->guest_msrs[to] = vmx->guest_msrs[from];
1581 vmx->guest_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +03001582}
1583
1584/*
Avi Kivitye38aea32007-04-19 13:22:48 +03001585 * Set up the vmcs to automatically save and restore system
1586 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
1587 * mode, as fiddling with msrs is very expensive.
1588 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001589static void setup_msrs(struct vcpu_vmx *vmx)
Avi Kivitye38aea32007-04-19 13:22:48 +03001590{
Avi Kivity26bb0982009-09-07 11:14:12 +03001591 int save_nmsrs, index;
Avi Kivity58972972009-02-24 22:26:47 +02001592 unsigned long *msr_bitmap;
Avi Kivitye38aea32007-04-19 13:22:48 +03001593
Avi Kivity33f9c502008-02-27 16:06:57 +02001594 vmx_load_host_state(vmx);
Eddie Donga75beee2007-05-17 18:55:15 +03001595 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001596#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +10001597 if (is_long_mode(&vmx->vcpu)) {
Rusty Russell8b9cf982007-07-30 16:31:43 +10001598 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
Eddie Donga75beee2007-05-17 18:55:15 +03001599 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001600 move_msr_up(vmx, index, save_nmsrs++);
1601 index = __find_msr_index(vmx, MSR_LSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001602 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001603 move_msr_up(vmx, index, save_nmsrs++);
1604 index = __find_msr_index(vmx, MSR_CSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001605 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001606 move_msr_up(vmx, index, save_nmsrs++);
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001607 index = __find_msr_index(vmx, MSR_TSC_AUX);
1608 if (index >= 0 && vmx->rdtscp_enabled)
1609 move_msr_up(vmx, index, save_nmsrs++);
Eddie Donga75beee2007-05-17 18:55:15 +03001610 /*
Brian Gerst8c065852010-07-17 09:03:26 -04001611 * MSR_STAR is only needed on long mode guests, and only
Eddie Donga75beee2007-05-17 18:55:15 +03001612 * if efer.sce is enabled.
1613 */
Brian Gerst8c065852010-07-17 09:03:26 -04001614 index = __find_msr_index(vmx, MSR_STAR);
Avi Kivityf6801df2010-01-21 15:31:50 +02001615 if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE))
Rusty Russell8b9cf982007-07-30 16:31:43 +10001616 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001617 }
Eddie Donga75beee2007-05-17 18:55:15 +03001618#endif
Avi Kivity92c0d902009-10-29 11:00:16 +02001619 index = __find_msr_index(vmx, MSR_EFER);
1620 if (index >= 0 && update_transition_efer(vmx, index))
Avi Kivity26bb0982009-09-07 11:14:12 +03001621 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001622
Avi Kivity26bb0982009-09-07 11:14:12 +03001623 vmx->save_nmsrs = save_nmsrs;
Avi Kivity58972972009-02-24 22:26:47 +02001624
1625 if (cpu_has_vmx_msr_bitmap()) {
1626 if (is_long_mode(&vmx->vcpu))
1627 msr_bitmap = vmx_msr_bitmap_longmode;
1628 else
1629 msr_bitmap = vmx_msr_bitmap_legacy;
1630
1631 vmcs_write64(MSR_BITMAP, __pa(msr_bitmap));
1632 }
Avi Kivitye38aea32007-04-19 13:22:48 +03001633}
1634
1635/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08001636 * reads and returns guest's timestamp counter "register"
1637 * guest_tsc = host_tsc + tsc_offset -- 21.3
1638 */
1639static u64 guest_read_tsc(void)
1640{
1641 u64 host_tsc, tsc_offset;
1642
1643 rdtscll(host_tsc);
1644 tsc_offset = vmcs_read64(TSC_OFFSET);
1645 return host_tsc + tsc_offset;
1646}
1647
1648/*
Joerg Roedel4051b182011-03-25 09:44:49 +01001649 * Empty call-back. Needs to be implemented when VMX enables the SET_TSC_KHZ
1650 * ioctl. In this case the call-back should update internal vmx state to make
1651 * the changes effective.
1652 */
1653static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz)
1654{
1655 /* Nothing to do here */
1656}
1657
1658/*
Zachary Amsden99e3e302010-08-19 22:07:17 -10001659 * writes 'offset' into guest's timestamp counter offset register
Avi Kivity6aa8b732006-12-10 02:21:36 -08001660 */
Zachary Amsden99e3e302010-08-19 22:07:17 -10001661static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001662{
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001663 vmcs_write64(TSC_OFFSET, offset);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001664}
1665
Zachary Amsdene48672f2010-08-19 22:07:23 -10001666static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
1667{
1668 u64 offset = vmcs_read64(TSC_OFFSET);
1669 vmcs_write64(TSC_OFFSET, offset + adjustment);
1670}
1671
Joerg Roedel857e4092011-03-25 09:44:50 +01001672static u64 vmx_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc)
1673{
1674 return target_tsc - native_read_tsc();
1675}
1676
Nadav Har'El801d3422011-05-25 23:02:23 +03001677static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu)
1678{
1679 struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 1, 0);
1680 return best && (best->ecx & (1 << (X86_FEATURE_VMX & 31)));
1681}
1682
1683/*
1684 * nested_vmx_allowed() checks whether a guest should be allowed to use VMX
1685 * instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for
1686 * all guests if the "nested" module option is off, and can also be disabled
1687 * for a single guest by disabling its VMX cpuid bit.
1688 */
1689static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu)
1690{
1691 return nested && guest_cpuid_has_vmx(vcpu);
1692}
1693
Avi Kivity6aa8b732006-12-10 02:21:36 -08001694/*
Nadav Har'Elb87a51a2011-05-25 23:04:25 +03001695 * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be
1696 * returned for the various VMX controls MSRs when nested VMX is enabled.
1697 * The same values should also be used to verify that vmcs12 control fields are
1698 * valid during nested entry from L1 to L2.
1699 * Each of these control msrs has a low and high 32-bit half: A low bit is on
1700 * if the corresponding bit in the (32-bit) control field *must* be on, and a
1701 * bit in the high half is on if the corresponding bit in the control field
1702 * may be on. See also vmx_control_verify().
1703 * TODO: allow these variables to be modified (downgraded) by module options
1704 * or other means.
1705 */
1706static u32 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high;
1707static u32 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high;
1708static u32 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high;
1709static u32 nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high;
1710static u32 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high;
1711static __init void nested_vmx_setup_ctls_msrs(void)
1712{
1713 /*
1714 * Note that as a general rule, the high half of the MSRs (bits in
1715 * the control fields which may be 1) should be initialized by the
1716 * intersection of the underlying hardware's MSR (i.e., features which
1717 * can be supported) and the list of features we want to expose -
1718 * because they are known to be properly supported in our code.
1719 * Also, usually, the low half of the MSRs (bits which must be 1) can
1720 * be set to 0, meaning that L1 may turn off any of these bits. The
1721 * reason is that if one of these bits is necessary, it will appear
1722 * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control
1723 * fields of vmcs01 and vmcs02, will turn these bits off - and
1724 * nested_vmx_exit_handled() will not pass related exits to L1.
1725 * These rules have exceptions below.
1726 */
1727
1728 /* pin-based controls */
1729 /*
1730 * According to the Intel spec, if bit 55 of VMX_BASIC is off (as it is
1731 * in our case), bits 1, 2 and 4 (i.e., 0x16) must be 1 in this MSR.
1732 */
1733 nested_vmx_pinbased_ctls_low = 0x16 ;
1734 nested_vmx_pinbased_ctls_high = 0x16 |
1735 PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING |
1736 PIN_BASED_VIRTUAL_NMIS;
1737
1738 /* exit controls */
1739 nested_vmx_exit_ctls_low = 0;
1740#ifdef CONFIG_X86_64
1741 nested_vmx_exit_ctls_high = VM_EXIT_HOST_ADDR_SPACE_SIZE;
1742#else
1743 nested_vmx_exit_ctls_high = 0;
1744#endif
1745
1746 /* entry controls */
1747 rdmsr(MSR_IA32_VMX_ENTRY_CTLS,
1748 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high);
1749 nested_vmx_entry_ctls_low = 0;
1750 nested_vmx_entry_ctls_high &=
1751 VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_IA32E_MODE;
1752
1753 /* cpu-based controls */
1754 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
1755 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high);
1756 nested_vmx_procbased_ctls_low = 0;
1757 nested_vmx_procbased_ctls_high &=
1758 CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_USE_TSC_OFFSETING |
1759 CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING |
1760 CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING |
1761 CPU_BASED_CR3_STORE_EXITING |
1762#ifdef CONFIG_X86_64
1763 CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING |
1764#endif
1765 CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING |
1766 CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_EXITING |
1767 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
1768 /*
1769 * We can allow some features even when not supported by the
1770 * hardware. For example, L1 can specify an MSR bitmap - and we
1771 * can use it to avoid exits to L1 - even when L0 runs L2
1772 * without MSR bitmaps.
1773 */
1774 nested_vmx_procbased_ctls_high |= CPU_BASED_USE_MSR_BITMAPS;
1775
1776 /* secondary cpu-based controls */
1777 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
1778 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high);
1779 nested_vmx_secondary_ctls_low = 0;
1780 nested_vmx_secondary_ctls_high &=
1781 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
1782}
1783
1784static inline bool vmx_control_verify(u32 control, u32 low, u32 high)
1785{
1786 /*
1787 * Bits 0 in high must be 0, and bits 1 in low must be 1.
1788 */
1789 return ((control & high) | low) == control;
1790}
1791
1792static inline u64 vmx_control_msr(u32 low, u32 high)
1793{
1794 return low | ((u64)high << 32);
1795}
1796
1797/*
1798 * If we allow our guest to use VMX instructions (i.e., nested VMX), we should
1799 * also let it use VMX-specific MSRs.
1800 * vmx_get_vmx_msr() and vmx_set_vmx_msr() return 1 when we handled a
1801 * VMX-specific MSR, or 0 when we haven't (and the caller should handle it
1802 * like all other MSRs).
1803 */
1804static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1805{
1806 if (!nested_vmx_allowed(vcpu) && msr_index >= MSR_IA32_VMX_BASIC &&
1807 msr_index <= MSR_IA32_VMX_TRUE_ENTRY_CTLS) {
1808 /*
1809 * According to the spec, processors which do not support VMX
1810 * should throw a #GP(0) when VMX capability MSRs are read.
1811 */
1812 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
1813 return 1;
1814 }
1815
1816 switch (msr_index) {
1817 case MSR_IA32_FEATURE_CONTROL:
1818 *pdata = 0;
1819 break;
1820 case MSR_IA32_VMX_BASIC:
1821 /*
1822 * This MSR reports some information about VMX support. We
1823 * should return information about the VMX we emulate for the
1824 * guest, and the VMCS structure we give it - not about the
1825 * VMX support of the underlying hardware.
1826 */
1827 *pdata = VMCS12_REVISION |
1828 ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) |
1829 (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT);
1830 break;
1831 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
1832 case MSR_IA32_VMX_PINBASED_CTLS:
1833 *pdata = vmx_control_msr(nested_vmx_pinbased_ctls_low,
1834 nested_vmx_pinbased_ctls_high);
1835 break;
1836 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
1837 case MSR_IA32_VMX_PROCBASED_CTLS:
1838 *pdata = vmx_control_msr(nested_vmx_procbased_ctls_low,
1839 nested_vmx_procbased_ctls_high);
1840 break;
1841 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
1842 case MSR_IA32_VMX_EXIT_CTLS:
1843 *pdata = vmx_control_msr(nested_vmx_exit_ctls_low,
1844 nested_vmx_exit_ctls_high);
1845 break;
1846 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
1847 case MSR_IA32_VMX_ENTRY_CTLS:
1848 *pdata = vmx_control_msr(nested_vmx_entry_ctls_low,
1849 nested_vmx_entry_ctls_high);
1850 break;
1851 case MSR_IA32_VMX_MISC:
1852 *pdata = 0;
1853 break;
1854 /*
1855 * These MSRs specify bits which the guest must keep fixed (on or off)
1856 * while L1 is in VMXON mode (in L1's root mode, or running an L2).
1857 * We picked the standard core2 setting.
1858 */
1859#define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE)
1860#define VMXON_CR4_ALWAYSON X86_CR4_VMXE
1861 case MSR_IA32_VMX_CR0_FIXED0:
1862 *pdata = VMXON_CR0_ALWAYSON;
1863 break;
1864 case MSR_IA32_VMX_CR0_FIXED1:
1865 *pdata = -1ULL;
1866 break;
1867 case MSR_IA32_VMX_CR4_FIXED0:
1868 *pdata = VMXON_CR4_ALWAYSON;
1869 break;
1870 case MSR_IA32_VMX_CR4_FIXED1:
1871 *pdata = -1ULL;
1872 break;
1873 case MSR_IA32_VMX_VMCS_ENUM:
1874 *pdata = 0x1f;
1875 break;
1876 case MSR_IA32_VMX_PROCBASED_CTLS2:
1877 *pdata = vmx_control_msr(nested_vmx_secondary_ctls_low,
1878 nested_vmx_secondary_ctls_high);
1879 break;
1880 case MSR_IA32_VMX_EPT_VPID_CAP:
1881 /* Currently, no nested ept or nested vpid */
1882 *pdata = 0;
1883 break;
1884 default:
1885 return 0;
1886 }
1887
1888 return 1;
1889}
1890
1891static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1892{
1893 if (!nested_vmx_allowed(vcpu))
1894 return 0;
1895
1896 if (msr_index == MSR_IA32_FEATURE_CONTROL)
1897 /* TODO: the right thing. */
1898 return 1;
1899 /*
1900 * No need to treat VMX capability MSRs specially: If we don't handle
1901 * them, handle_wrmsr will #GP(0), which is correct (they are readonly)
1902 */
1903 return 0;
1904}
1905
1906/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08001907 * Reads an msr value (of 'msr_index') into 'pdata'.
1908 * Returns 0 on success, non-0 otherwise.
1909 * Assumes vcpu_load() was already called.
1910 */
1911static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1912{
1913 u64 data;
Avi Kivity26bb0982009-09-07 11:14:12 +03001914 struct shared_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001915
1916 if (!pdata) {
1917 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
1918 return -EINVAL;
1919 }
1920
1921 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001922#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001923 case MSR_FS_BASE:
1924 data = vmcs_readl(GUEST_FS_BASE);
1925 break;
1926 case MSR_GS_BASE:
1927 data = vmcs_readl(GUEST_GS_BASE);
1928 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001929 case MSR_KERNEL_GS_BASE:
1930 vmx_load_host_state(to_vmx(vcpu));
1931 data = to_vmx(vcpu)->msr_guest_kernel_gs_base;
1932 break;
Avi Kivity26bb0982009-09-07 11:14:12 +03001933#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001934 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -08001935 return kvm_get_msr_common(vcpu, msr_index, pdata);
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301936 case MSR_IA32_TSC:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001937 data = guest_read_tsc();
1938 break;
1939 case MSR_IA32_SYSENTER_CS:
1940 data = vmcs_read32(GUEST_SYSENTER_CS);
1941 break;
1942 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001943 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001944 break;
1945 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001946 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001947 break;
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001948 case MSR_TSC_AUX:
1949 if (!to_vmx(vcpu)->rdtscp_enabled)
1950 return 1;
1951 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001952 default:
Avi Kivity26bb0982009-09-07 11:14:12 +03001953 vmx_load_host_state(to_vmx(vcpu));
Nadav Har'Elb87a51a2011-05-25 23:04:25 +03001954 if (vmx_get_vmx_msr(vcpu, msr_index, pdata))
1955 return 0;
Rusty Russell8b9cf982007-07-30 16:31:43 +10001956 msr = find_msr_entry(to_vmx(vcpu), msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001957 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001958 vmx_load_host_state(to_vmx(vcpu));
Avi Kivity3bab1f52006-12-29 16:49:48 -08001959 data = msr->data;
1960 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001961 }
Avi Kivity3bab1f52006-12-29 16:49:48 -08001962 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001963 }
1964
1965 *pdata = data;
1966 return 0;
1967}
1968
1969/*
1970 * Writes msr value into into the appropriate "register".
1971 * Returns 0 on success, non-0 otherwise.
1972 * Assumes vcpu_load() was already called.
1973 */
1974static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1975{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001976 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001977 struct shared_msr_entry *msr;
Eddie Dong2cc51562007-05-21 07:28:09 +03001978 int ret = 0;
1979
Avi Kivity6aa8b732006-12-10 02:21:36 -08001980 switch (msr_index) {
Avi Kivity3bab1f52006-12-29 16:49:48 -08001981 case MSR_EFER:
Avi Kivitya9b21b62008-06-24 11:48:49 +03001982 vmx_load_host_state(vmx);
Eddie Dong2cc51562007-05-21 07:28:09 +03001983 ret = kvm_set_msr_common(vcpu, msr_index, data);
Eddie Dong2cc51562007-05-21 07:28:09 +03001984 break;
Avi Kivity16175a72009-03-23 22:13:44 +02001985#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001986 case MSR_FS_BASE:
Avi Kivity2fb92db2011-04-27 19:42:18 +03001987 vmx_segment_cache_clear(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001988 vmcs_writel(GUEST_FS_BASE, data);
1989 break;
1990 case MSR_GS_BASE:
Avi Kivity2fb92db2011-04-27 19:42:18 +03001991 vmx_segment_cache_clear(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001992 vmcs_writel(GUEST_GS_BASE, data);
1993 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001994 case MSR_KERNEL_GS_BASE:
1995 vmx_load_host_state(vmx);
1996 vmx->msr_guest_kernel_gs_base = data;
1997 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001998#endif
1999 case MSR_IA32_SYSENTER_CS:
2000 vmcs_write32(GUEST_SYSENTER_CS, data);
2001 break;
2002 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02002003 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002004 break;
2005 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02002006 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002007 break;
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05302008 case MSR_IA32_TSC:
Zachary Amsden99e3e302010-08-19 22:07:17 -10002009 kvm_write_tsc(vcpu, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002010 break;
Sheng Yang468d4722008-10-09 16:01:55 +08002011 case MSR_IA32_CR_PAT:
2012 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2013 vmcs_write64(GUEST_IA32_PAT, data);
2014 vcpu->arch.pat = data;
2015 break;
2016 }
Sheng Yang4e47c7a2009-12-18 16:48:47 +08002017 ret = kvm_set_msr_common(vcpu, msr_index, data);
2018 break;
2019 case MSR_TSC_AUX:
2020 if (!vmx->rdtscp_enabled)
2021 return 1;
2022 /* Check reserved bit, higher 32 bits should be zero */
2023 if ((data >> 32) != 0)
2024 return 1;
2025 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002026 default:
Nadav Har'Elb87a51a2011-05-25 23:04:25 +03002027 if (vmx_set_vmx_msr(vcpu, msr_index, data))
2028 break;
Rusty Russell8b9cf982007-07-30 16:31:43 +10002029 msr = find_msr_entry(vmx, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08002030 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03002031 vmx_load_host_state(vmx);
Avi Kivity3bab1f52006-12-29 16:49:48 -08002032 msr->data = data;
2033 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002034 }
Eddie Dong2cc51562007-05-21 07:28:09 +03002035 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002036 }
2037
Eddie Dong2cc51562007-05-21 07:28:09 +03002038 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002039}
2040
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002041static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002042{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002043 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
2044 switch (reg) {
2045 case VCPU_REGS_RSP:
2046 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
2047 break;
2048 case VCPU_REGS_RIP:
2049 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
2050 break;
Avi Kivity6de4f3a2009-05-31 22:58:47 +03002051 case VCPU_EXREG_PDPTR:
2052 if (enable_ept)
2053 ept_save_pdptrs(vcpu);
2054 break;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002055 default:
2056 break;
2057 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002058}
2059
Jan Kiszka355be0b2009-10-03 00:31:21 +02002060static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002061{
Jan Kiszkaae675ef2008-12-15 13:52:10 +01002062 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
2063 vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]);
2064 else
2065 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
2066
Avi Kivityabd3f2d2007-05-02 17:57:40 +03002067 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002068}
2069
2070static __init int cpu_has_kvm_support(void)
2071{
Eduardo Habkost6210e372008-11-17 19:03:16 -02002072 return cpu_has_vmx();
Avi Kivity6aa8b732006-12-10 02:21:36 -08002073}
2074
2075static __init int vmx_disabled_by_bios(void)
2076{
2077 u64 msr;
2078
2079 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Shane Wangcafd6652010-04-29 12:09:01 -04002080 if (msr & FEATURE_CONTROL_LOCKED) {
Joseph Cihula23f3e992011-02-08 11:45:56 -08002081 /* launched w/ TXT and VMX disabled */
Shane Wangcafd6652010-04-29 12:09:01 -04002082 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
2083 && tboot_enabled())
2084 return 1;
Joseph Cihula23f3e992011-02-08 11:45:56 -08002085 /* launched w/o TXT and VMX only enabled w/ TXT */
Shane Wangcafd6652010-04-29 12:09:01 -04002086 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
Joseph Cihula23f3e992011-02-08 11:45:56 -08002087 && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
Shane Wangf9335af2010-11-17 11:40:17 +08002088 && !tboot_enabled()) {
2089 printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
Joseph Cihula23f3e992011-02-08 11:45:56 -08002090 "activate TXT before enabling KVM\n");
Shane Wangcafd6652010-04-29 12:09:01 -04002091 return 1;
Shane Wangf9335af2010-11-17 11:40:17 +08002092 }
Joseph Cihula23f3e992011-02-08 11:45:56 -08002093 /* launched w/o TXT and VMX disabled */
2094 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
2095 && !tboot_enabled())
2096 return 1;
Shane Wangcafd6652010-04-29 12:09:01 -04002097 }
2098
2099 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002100}
2101
Dongxiao Xu7725b892010-05-11 18:29:38 +08002102static void kvm_cpu_vmxon(u64 addr)
2103{
2104 asm volatile (ASM_VMX_VMXON_RAX
2105 : : "a"(&addr), "m"(addr)
2106 : "memory", "cc");
2107}
2108
Alexander Graf10474ae2009-09-15 11:37:46 +02002109static int hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002110{
2111 int cpu = raw_smp_processor_id();
2112 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Shane Wangcafd6652010-04-29 12:09:01 -04002113 u64 old, test_bits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002114
Alexander Graf10474ae2009-09-15 11:37:46 +02002115 if (read_cr4() & X86_CR4_VMXE)
2116 return -EBUSY;
2117
Nadav Har'Eld462b812011-05-24 15:26:10 +03002118 INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002119 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Shane Wangcafd6652010-04-29 12:09:01 -04002120
2121 test_bits = FEATURE_CONTROL_LOCKED;
2122 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
2123 if (tboot_enabled())
2124 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX;
2125
2126 if ((old & test_bits) != test_bits) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002127 /* enable and lock */
Shane Wangcafd6652010-04-29 12:09:01 -04002128 wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits);
2129 }
Rusty Russell66aee912007-07-17 23:34:16 +10002130 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Alexander Graf10474ae2009-09-15 11:37:46 +02002131
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08002132 if (vmm_exclusive) {
2133 kvm_cpu_vmxon(phys_addr);
2134 ept_sync_global();
2135 }
Alexander Graf10474ae2009-09-15 11:37:46 +02002136
Avi Kivity3444d7d2010-07-26 18:32:38 +03002137 store_gdt(&__get_cpu_var(host_gdt));
2138
Alexander Graf10474ae2009-09-15 11:37:46 +02002139 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002140}
2141
Nadav Har'Eld462b812011-05-24 15:26:10 +03002142static void vmclear_local_loaded_vmcss(void)
Avi Kivity543e4242008-05-13 16:22:47 +03002143{
2144 int cpu = raw_smp_processor_id();
Nadav Har'Eld462b812011-05-24 15:26:10 +03002145 struct loaded_vmcs *v, *n;
Avi Kivity543e4242008-05-13 16:22:47 +03002146
Nadav Har'Eld462b812011-05-24 15:26:10 +03002147 list_for_each_entry_safe(v, n, &per_cpu(loaded_vmcss_on_cpu, cpu),
2148 loaded_vmcss_on_cpu_link)
2149 __loaded_vmcs_clear(v);
Avi Kivity543e4242008-05-13 16:22:47 +03002150}
2151
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02002152
2153/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
2154 * tricks.
2155 */
2156static void kvm_cpu_vmxoff(void)
2157{
2158 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02002159}
2160
Avi Kivity6aa8b732006-12-10 02:21:36 -08002161static void hardware_disable(void *garbage)
2162{
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08002163 if (vmm_exclusive) {
Nadav Har'Eld462b812011-05-24 15:26:10 +03002164 vmclear_local_loaded_vmcss();
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08002165 kvm_cpu_vmxoff();
2166 }
Dongxiao Xu7725b892010-05-11 18:29:38 +08002167 write_cr4(read_cr4() & ~X86_CR4_VMXE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002168}
2169
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002170static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
Mike Dayd77c26f2007-10-08 09:02:08 -04002171 u32 msr, u32 *result)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002172{
2173 u32 vmx_msr_low, vmx_msr_high;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002174 u32 ctl = ctl_min | ctl_opt;
2175
2176 rdmsr(msr, vmx_msr_low, vmx_msr_high);
2177
2178 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
2179 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
2180
2181 /* Ensure minimum (required) set of control bits are supported. */
2182 if (ctl_min & ~ctl)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002183 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002184
2185 *result = ctl;
2186 return 0;
2187}
2188
Avi Kivity110312c2010-12-21 12:54:20 +02002189static __init bool allow_1_setting(u32 msr, u32 ctl)
2190{
2191 u32 vmx_msr_low, vmx_msr_high;
2192
2193 rdmsr(msr, vmx_msr_low, vmx_msr_high);
2194 return vmx_msr_high & ctl;
2195}
2196
Yang, Sheng002c7f72007-07-31 14:23:01 +03002197static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002198{
2199 u32 vmx_msr_low, vmx_msr_high;
Sheng Yangd56f5462008-04-25 10:13:16 +08002200 u32 min, opt, min2, opt2;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002201 u32 _pin_based_exec_control = 0;
2202 u32 _cpu_based_exec_control = 0;
Sheng Yangf78e0e22007-10-29 09:40:42 +08002203 u32 _cpu_based_2nd_exec_control = 0;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002204 u32 _vmexit_control = 0;
2205 u32 _vmentry_control = 0;
2206
2207 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
Sheng Yangf08864b2008-05-15 18:23:25 +08002208 opt = PIN_BASED_VIRTUAL_NMIS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002209 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
2210 &_pin_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002211 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002212
Anthony Liguori443381a2010-12-06 10:53:38 -06002213 min =
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002214#ifdef CONFIG_X86_64
2215 CPU_BASED_CR8_LOAD_EXITING |
2216 CPU_BASED_CR8_STORE_EXITING |
2217#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08002218 CPU_BASED_CR3_LOAD_EXITING |
2219 CPU_BASED_CR3_STORE_EXITING |
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002220 CPU_BASED_USE_IO_BITMAPS |
2221 CPU_BASED_MOV_DR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03002222 CPU_BASED_USE_TSC_OFFSETING |
Sheng Yang59708672009-12-15 13:29:54 +08002223 CPU_BASED_MWAIT_EXITING |
2224 CPU_BASED_MONITOR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03002225 CPU_BASED_INVLPG_EXITING;
Anthony Liguori443381a2010-12-06 10:53:38 -06002226
2227 if (yield_on_hlt)
2228 min |= CPU_BASED_HLT_EXITING;
2229
Sheng Yangf78e0e22007-10-29 09:40:42 +08002230 opt = CPU_BASED_TPR_SHADOW |
Sheng Yang25c5f222008-03-28 13:18:56 +08002231 CPU_BASED_USE_MSR_BITMAPS |
Sheng Yangf78e0e22007-10-29 09:40:42 +08002232 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002233 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
2234 &_cpu_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002235 return -EIO;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002236#ifdef CONFIG_X86_64
2237 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
2238 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
2239 ~CPU_BASED_CR8_STORE_EXITING;
2240#endif
Sheng Yangf78e0e22007-10-29 09:40:42 +08002241 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
Sheng Yangd56f5462008-04-25 10:13:16 +08002242 min2 = 0;
2243 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
Sheng Yang2384d2b2008-01-17 15:14:33 +08002244 SECONDARY_EXEC_WBINVD_EXITING |
Sheng Yangd56f5462008-04-25 10:13:16 +08002245 SECONDARY_EXEC_ENABLE_VPID |
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002246 SECONDARY_EXEC_ENABLE_EPT |
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002247 SECONDARY_EXEC_UNRESTRICTED_GUEST |
Sheng Yang4e47c7a2009-12-18 16:48:47 +08002248 SECONDARY_EXEC_PAUSE_LOOP_EXITING |
2249 SECONDARY_EXEC_RDTSCP;
Sheng Yangd56f5462008-04-25 10:13:16 +08002250 if (adjust_vmx_controls(min2, opt2,
2251 MSR_IA32_VMX_PROCBASED_CTLS2,
Sheng Yangf78e0e22007-10-29 09:40:42 +08002252 &_cpu_based_2nd_exec_control) < 0)
2253 return -EIO;
2254 }
2255#ifndef CONFIG_X86_64
2256 if (!(_cpu_based_2nd_exec_control &
2257 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
2258 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
2259#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08002260 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
Marcelo Tosattia7052892008-09-23 13:18:35 -03002261 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
2262 enabled */
Gleb Natapov5fff7d22009-08-27 18:41:30 +03002263 _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING |
2264 CPU_BASED_CR3_STORE_EXITING |
2265 CPU_BASED_INVLPG_EXITING);
Sheng Yangd56f5462008-04-25 10:13:16 +08002266 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
2267 vmx_capability.ept, vmx_capability.vpid);
2268 }
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002269
2270 min = 0;
2271#ifdef CONFIG_X86_64
2272 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
2273#endif
Sheng Yang468d4722008-10-09 16:01:55 +08002274 opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002275 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
2276 &_vmexit_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002277 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002278
Sheng Yang468d4722008-10-09 16:01:55 +08002279 min = 0;
2280 opt = VM_ENTRY_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002281 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
2282 &_vmentry_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002283 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002284
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08002285 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002286
2287 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
2288 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002289 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002290
2291#ifdef CONFIG_X86_64
2292 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
2293 if (vmx_msr_high & (1u<<16))
Yang, Sheng002c7f72007-07-31 14:23:01 +03002294 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002295#endif
2296
2297 /* Require Write-Back (WB) memory type for VMCS accesses. */
2298 if (((vmx_msr_high >> 18) & 15) != 6)
Yang, Sheng002c7f72007-07-31 14:23:01 +03002299 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002300
Yang, Sheng002c7f72007-07-31 14:23:01 +03002301 vmcs_conf->size = vmx_msr_high & 0x1fff;
2302 vmcs_conf->order = get_order(vmcs_config.size);
2303 vmcs_conf->revision_id = vmx_msr_low;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002304
Yang, Sheng002c7f72007-07-31 14:23:01 +03002305 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
2306 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
Sheng Yangf78e0e22007-10-29 09:40:42 +08002307 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Yang, Sheng002c7f72007-07-31 14:23:01 +03002308 vmcs_conf->vmexit_ctrl = _vmexit_control;
2309 vmcs_conf->vmentry_ctrl = _vmentry_control;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002310
Avi Kivity110312c2010-12-21 12:54:20 +02002311 cpu_has_load_ia32_efer =
2312 allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
2313 VM_ENTRY_LOAD_IA32_EFER)
2314 && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS,
2315 VM_EXIT_LOAD_IA32_EFER);
2316
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002317 return 0;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08002318}
Avi Kivity6aa8b732006-12-10 02:21:36 -08002319
2320static struct vmcs *alloc_vmcs_cpu(int cpu)
2321{
2322 int node = cpu_to_node(cpu);
2323 struct page *pages;
2324 struct vmcs *vmcs;
2325
Mel Gorman6484eb32009-06-16 15:31:54 -07002326 pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002327 if (!pages)
2328 return NULL;
2329 vmcs = page_address(pages);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002330 memset(vmcs, 0, vmcs_config.size);
2331 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002332 return vmcs;
2333}
2334
2335static struct vmcs *alloc_vmcs(void)
2336{
Ingo Molnard3b2c332007-01-05 16:36:23 -08002337 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -08002338}
2339
2340static void free_vmcs(struct vmcs *vmcs)
2341{
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002342 free_pages((unsigned long)vmcs, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002343}
2344
Nadav Har'Eld462b812011-05-24 15:26:10 +03002345/*
2346 * Free a VMCS, but before that VMCLEAR it on the CPU where it was last loaded
2347 */
2348static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs)
2349{
2350 if (!loaded_vmcs->vmcs)
2351 return;
2352 loaded_vmcs_clear(loaded_vmcs);
2353 free_vmcs(loaded_vmcs->vmcs);
2354 loaded_vmcs->vmcs = NULL;
2355}
2356
Sam Ravnborg39959582007-06-01 00:47:13 -07002357static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002358{
2359 int cpu;
2360
Zachary Amsden3230bb42009-09-29 11:38:37 -10002361 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002362 free_vmcs(per_cpu(vmxarea, cpu));
Zachary Amsden3230bb42009-09-29 11:38:37 -10002363 per_cpu(vmxarea, cpu) = NULL;
2364 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002365}
2366
Avi Kivity6aa8b732006-12-10 02:21:36 -08002367static __init int alloc_kvm_area(void)
2368{
2369 int cpu;
2370
Zachary Amsden3230bb42009-09-29 11:38:37 -10002371 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002372 struct vmcs *vmcs;
2373
2374 vmcs = alloc_vmcs_cpu(cpu);
2375 if (!vmcs) {
2376 free_kvm_area();
2377 return -ENOMEM;
2378 }
2379
2380 per_cpu(vmxarea, cpu) = vmcs;
2381 }
2382 return 0;
2383}
2384
2385static __init int hardware_setup(void)
2386{
Yang, Sheng002c7f72007-07-31 14:23:01 +03002387 if (setup_vmcs_config(&vmcs_config) < 0)
2388 return -EIO;
Joerg Roedel50a37eb2008-01-31 14:57:38 +01002389
2390 if (boot_cpu_has(X86_FEATURE_NX))
2391 kvm_enable_efer_bits(EFER_NX);
2392
Sheng Yang93ba03c2009-04-01 15:52:32 +08002393 if (!cpu_has_vmx_vpid())
2394 enable_vpid = 0;
2395
Sheng Yang4bc9b982010-06-02 14:05:24 +08002396 if (!cpu_has_vmx_ept() ||
2397 !cpu_has_vmx_ept_4levels()) {
Sheng Yang93ba03c2009-04-01 15:52:32 +08002398 enable_ept = 0;
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002399 enable_unrestricted_guest = 0;
2400 }
2401
2402 if (!cpu_has_vmx_unrestricted_guest())
2403 enable_unrestricted_guest = 0;
Sheng Yang93ba03c2009-04-01 15:52:32 +08002404
2405 if (!cpu_has_vmx_flexpriority())
2406 flexpriority_enabled = 0;
2407
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002408 if (!cpu_has_vmx_tpr_shadow())
2409 kvm_x86_ops->update_cr8_intercept = NULL;
2410
Marcelo Tosatti54dee992009-06-11 12:07:44 -03002411 if (enable_ept && !cpu_has_vmx_ept_2m_page())
2412 kvm_disable_largepages();
2413
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002414 if (!cpu_has_vmx_ple())
2415 ple_gap = 0;
2416
Nadav Har'Elb87a51a2011-05-25 23:04:25 +03002417 if (nested)
2418 nested_vmx_setup_ctls_msrs();
2419
Avi Kivity6aa8b732006-12-10 02:21:36 -08002420 return alloc_kvm_area();
2421}
2422
2423static __exit void hardware_unsetup(void)
2424{
2425 free_kvm_area();
2426}
2427
Avi Kivity6aa8b732006-12-10 02:21:36 -08002428static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
2429{
2430 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2431
Avi Kivity6af11b92007-03-19 13:18:10 +02002432 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08002433 vmcs_write16(sf->selector, save->selector);
2434 vmcs_writel(sf->base, save->base);
2435 vmcs_write32(sf->limit, save->limit);
2436 vmcs_write32(sf->ar_bytes, save->ar);
2437 } else {
2438 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
2439 << AR_DPL_SHIFT;
2440 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
2441 }
2442}
2443
2444static void enter_pmode(struct kvm_vcpu *vcpu)
2445{
2446 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002447 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002448
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002449 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002450 vmx->rmode.vm86_active = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002451
Avi Kivity2fb92db2011-04-27 19:42:18 +03002452 vmx_segment_cache_clear(vmx);
2453
Avi Kivityd0ba64f2011-01-03 14:28:51 +02002454 vmcs_write16(GUEST_TR_SELECTOR, vmx->rmode.tr.selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002455 vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base);
2456 vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit);
2457 vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002458
2459 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03002460 flags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
2461 flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002462 vmcs_writel(GUEST_RFLAGS, flags);
2463
Rusty Russell66aee912007-07-17 23:34:16 +10002464 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
2465 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002466
2467 update_exception_bitmap(vcpu);
2468
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002469 if (emulate_invalid_guest_state)
2470 return;
2471
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002472 fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es);
2473 fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds);
2474 fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs);
2475 fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002476
Avi Kivity2fb92db2011-04-27 19:42:18 +03002477 vmx_segment_cache_clear(vmx);
2478
Avi Kivity6aa8b732006-12-10 02:21:36 -08002479 vmcs_write16(GUEST_SS_SELECTOR, 0);
2480 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
2481
2482 vmcs_write16(GUEST_CS_SELECTOR,
2483 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
2484 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
2485}
2486
Mike Dayd77c26f2007-10-08 09:02:08 -04002487static gva_t rmode_tss_base(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002488{
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002489 if (!kvm->arch.tss_addr) {
Marcelo Tosattibc6678a2009-12-23 14:35:21 -02002490 struct kvm_memslots *slots;
2491 gfn_t base_gfn;
2492
Lai Jiangshan90d83dc2010-04-19 17:41:23 +08002493 slots = kvm_memslots(kvm);
Avi Kivityf495c6e2010-06-10 17:21:29 +03002494 base_gfn = slots->memslots[0].base_gfn +
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -02002495 kvm->memslots->memslots[0].npages - 3;
Izik Eiduscbc94022007-10-25 00:29:55 +02002496 return base_gfn << PAGE_SHIFT;
2497 }
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002498 return kvm->arch.tss_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002499}
2500
2501static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
2502{
2503 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2504
2505 save->selector = vmcs_read16(sf->selector);
2506 save->base = vmcs_readl(sf->base);
2507 save->limit = vmcs_read32(sf->limit);
2508 save->ar = vmcs_read32(sf->ar_bytes);
Jan Kiszka15b00f32007-11-19 10:21:45 +01002509 vmcs_write16(sf->selector, save->base >> 4);
Gleb Natapov444e8632010-12-27 17:25:04 +02002510 vmcs_write32(sf->base, save->base & 0xffff0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002511 vmcs_write32(sf->limit, 0xffff);
2512 vmcs_write32(sf->ar_bytes, 0xf3);
Gleb Natapov444e8632010-12-27 17:25:04 +02002513 if (save->base & 0xf)
2514 printk_once(KERN_WARNING "kvm: segment base is not paragraph"
2515 " aligned when entering protected mode (seg=%d)",
2516 seg);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002517}
2518
2519static void enter_rmode(struct kvm_vcpu *vcpu)
2520{
2521 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002522 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002523
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002524 if (enable_unrestricted_guest)
2525 return;
2526
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002527 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002528 vmx->rmode.vm86_active = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002529
Gleb Natapov776e58e2011-03-13 12:34:27 +02002530 /*
2531 * Very old userspace does not call KVM_SET_TSS_ADDR before entering
2532 * vcpu. Call it here with phys address pointing 16M below 4G.
2533 */
2534 if (!vcpu->kvm->arch.tss_addr) {
2535 printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be "
2536 "called before entering vcpu\n");
2537 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
2538 vmx_set_tss_addr(vcpu->kvm, 0xfeffd000);
2539 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2540 }
2541
Avi Kivity2fb92db2011-04-27 19:42:18 +03002542 vmx_segment_cache_clear(vmx);
2543
Avi Kivityd0ba64f2011-01-03 14:28:51 +02002544 vmx->rmode.tr.selector = vmcs_read16(GUEST_TR_SELECTOR);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002545 vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002546 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
2547
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002548 vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002549 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
2550
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002551 vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002552 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2553
2554 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03002555 vmx->rmode.save_rflags = flags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002556
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01002557 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002558
2559 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10002560 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002561 update_exception_bitmap(vcpu);
2562
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002563 if (emulate_invalid_guest_state)
2564 goto continue_rmode;
2565
Avi Kivity6aa8b732006-12-10 02:21:36 -08002566 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
2567 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
2568 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
2569
2570 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08002571 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02002572 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
2573 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002574 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
2575
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002576 fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es);
2577 fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds);
2578 fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs);
2579 fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03002580
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002581continue_rmode:
Eddie Dong8668a3c2007-10-10 14:26:45 +08002582 kvm_mmu_reset_context(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002583}
2584
Amit Shah401d10d2009-02-20 22:53:37 +05302585static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
2586{
2587 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03002588 struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
2589
2590 if (!msr)
2591 return;
Amit Shah401d10d2009-02-20 22:53:37 +05302592
Avi Kivity44ea2b12009-09-06 15:55:37 +03002593 /*
2594 * Force kernel_gs_base reloading before EFER changes, as control
2595 * of this msr depends on is_long_mode().
2596 */
2597 vmx_load_host_state(to_vmx(vcpu));
Avi Kivityf6801df2010-01-21 15:31:50 +02002598 vcpu->arch.efer = efer;
Amit Shah401d10d2009-02-20 22:53:37 +05302599 if (efer & EFER_LMA) {
2600 vmcs_write32(VM_ENTRY_CONTROLS,
2601 vmcs_read32(VM_ENTRY_CONTROLS) |
2602 VM_ENTRY_IA32E_MODE);
2603 msr->data = efer;
2604 } else {
2605 vmcs_write32(VM_ENTRY_CONTROLS,
2606 vmcs_read32(VM_ENTRY_CONTROLS) &
2607 ~VM_ENTRY_IA32E_MODE);
2608
2609 msr->data = efer & ~EFER_LME;
2610 }
2611 setup_msrs(vmx);
2612}
2613
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002614#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002615
2616static void enter_lmode(struct kvm_vcpu *vcpu)
2617{
2618 u32 guest_tr_ar;
2619
Avi Kivity2fb92db2011-04-27 19:42:18 +03002620 vmx_segment_cache_clear(to_vmx(vcpu));
2621
Avi Kivity6aa8b732006-12-10 02:21:36 -08002622 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
2623 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
2624 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08002625 __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002626 vmcs_write32(GUEST_TR_AR_BYTES,
2627 (guest_tr_ar & ~AR_TYPE_MASK)
2628 | AR_TYPE_BUSY_64_TSS);
2629 }
Avi Kivityda38f432010-07-06 11:30:49 +03002630 vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002631}
2632
2633static void exit_lmode(struct kvm_vcpu *vcpu)
2634{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002635 vmcs_write32(VM_ENTRY_CONTROLS,
2636 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03002637 & ~VM_ENTRY_IA32E_MODE);
Avi Kivityda38f432010-07-06 11:30:49 +03002638 vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002639}
2640
2641#endif
2642
Sheng Yang2384d2b2008-01-17 15:14:33 +08002643static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
2644{
Gui Jianfengb9d762f2010-06-07 10:32:29 +08002645 vpid_sync_context(to_vmx(vcpu));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08002646 if (enable_ept) {
2647 if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
2648 return;
Sheng Yang4e1096d2008-07-06 19:16:51 +08002649 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08002650 }
Sheng Yang2384d2b2008-01-17 15:14:33 +08002651}
2652
Avi Kivitye8467fd2009-12-29 18:43:06 +02002653static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
2654{
2655 ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
2656
2657 vcpu->arch.cr0 &= ~cr0_guest_owned_bits;
2658 vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
2659}
2660
Avi Kivityaff48ba2010-12-05 18:56:11 +02002661static void vmx_decache_cr3(struct kvm_vcpu *vcpu)
2662{
2663 if (enable_ept && is_paging(vcpu))
2664 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
2665 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
2666}
2667
Anthony Liguori25c4c272007-04-27 09:29:21 +03002668static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08002669{
Avi Kivityfc78f512009-12-07 12:16:48 +02002670 ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
2671
2672 vcpu->arch.cr4 &= ~cr4_guest_owned_bits;
2673 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits;
Avi Kivity399badf2007-01-05 16:36:38 -08002674}
2675
Sheng Yang14394422008-04-28 12:24:45 +08002676static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
2677{
Avi Kivity6de4f3a2009-05-31 22:58:47 +03002678 if (!test_bit(VCPU_EXREG_PDPTR,
2679 (unsigned long *)&vcpu->arch.regs_dirty))
2680 return;
2681
Sheng Yang14394422008-04-28 12:24:45 +08002682 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02002683 vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]);
2684 vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]);
2685 vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]);
2686 vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]);
Sheng Yang14394422008-04-28 12:24:45 +08002687 }
2688}
2689
Avi Kivity8f5d5492009-05-31 18:41:29 +03002690static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
2691{
2692 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02002693 vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0);
2694 vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1);
2695 vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2);
2696 vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3);
Avi Kivity8f5d5492009-05-31 18:41:29 +03002697 }
Avi Kivity6de4f3a2009-05-31 22:58:47 +03002698
2699 __set_bit(VCPU_EXREG_PDPTR,
2700 (unsigned long *)&vcpu->arch.regs_avail);
2701 __set_bit(VCPU_EXREG_PDPTR,
2702 (unsigned long *)&vcpu->arch.regs_dirty);
Avi Kivity8f5d5492009-05-31 18:41:29 +03002703}
2704
Nadav Har'El5e1746d2011-05-25 23:03:24 +03002705static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
Sheng Yang14394422008-04-28 12:24:45 +08002706
2707static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
2708 unsigned long cr0,
2709 struct kvm_vcpu *vcpu)
2710{
Marcelo Tosatti5233dd52011-06-06 14:27:47 -03002711 if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
2712 vmx_decache_cr3(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08002713 if (!(cr0 & X86_CR0_PG)) {
2714 /* From paging/starting to nonpaging */
2715 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08002716 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
Sheng Yang14394422008-04-28 12:24:45 +08002717 (CPU_BASED_CR3_LOAD_EXITING |
2718 CPU_BASED_CR3_STORE_EXITING));
2719 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02002720 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08002721 } else if (!is_paging(vcpu)) {
2722 /* From nonpaging to paging */
2723 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08002724 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
Sheng Yang14394422008-04-28 12:24:45 +08002725 ~(CPU_BASED_CR3_LOAD_EXITING |
2726 CPU_BASED_CR3_STORE_EXITING));
2727 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02002728 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08002729 }
Sheng Yang95eb84a2009-08-19 09:52:18 +08002730
2731 if (!(cr0 & X86_CR0_WP))
2732 *hw_cr0 &= ~X86_CR0_WP;
Sheng Yang14394422008-04-28 12:24:45 +08002733}
2734
Avi Kivity6aa8b732006-12-10 02:21:36 -08002735static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
2736{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002737 struct vcpu_vmx *vmx = to_vmx(vcpu);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002738 unsigned long hw_cr0;
2739
2740 if (enable_unrestricted_guest)
2741 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST)
2742 | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST;
2743 else
2744 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON;
Sheng Yang14394422008-04-28 12:24:45 +08002745
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002746 if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002747 enter_pmode(vcpu);
2748
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002749 if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002750 enter_rmode(vcpu);
2751
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002752#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02002753 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92f2007-07-17 23:19:08 +10002754 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002755 enter_lmode(vcpu);
Rusty Russell707d92f2007-07-17 23:19:08 +10002756 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08002757 exit_lmode(vcpu);
2758 }
2759#endif
2760
Avi Kivity089d0342009-03-23 18:26:32 +02002761 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08002762 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
2763
Avi Kivity02daab22009-12-30 12:40:26 +02002764 if (!vcpu->fpu_active)
Avi Kivity81231c62010-01-24 16:26:40 +02002765 hw_cr0 |= X86_CR0_TS | X86_CR0_MP;
Avi Kivity02daab22009-12-30 12:40:26 +02002766
Avi Kivity6aa8b732006-12-10 02:21:36 -08002767 vmcs_writel(CR0_READ_SHADOW, cr0);
Sheng Yang14394422008-04-28 12:24:45 +08002768 vmcs_writel(GUEST_CR0, hw_cr0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002769 vcpu->arch.cr0 = cr0;
Avi Kivity69c73022011-03-07 15:26:44 +02002770 __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002771}
2772
Sheng Yang14394422008-04-28 12:24:45 +08002773static u64 construct_eptp(unsigned long root_hpa)
2774{
2775 u64 eptp;
2776
2777 /* TODO write the value reading from MSR */
2778 eptp = VMX_EPT_DEFAULT_MT |
2779 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
2780 eptp |= (root_hpa & PAGE_MASK);
2781
2782 return eptp;
2783}
2784
Avi Kivity6aa8b732006-12-10 02:21:36 -08002785static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
2786{
Sheng Yang14394422008-04-28 12:24:45 +08002787 unsigned long guest_cr3;
2788 u64 eptp;
2789
2790 guest_cr3 = cr3;
Avi Kivity089d0342009-03-23 18:26:32 +02002791 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08002792 eptp = construct_eptp(cr3);
2793 vmcs_write64(EPT_POINTER, eptp);
Avi Kivity9f8fe502010-12-05 17:30:00 +02002794 guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) :
Sheng Yangb927a3c2009-07-21 10:42:48 +08002795 vcpu->kvm->arch.ept_identity_map_addr;
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02002796 ept_load_pdptrs(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08002797 }
2798
Sheng Yang2384d2b2008-01-17 15:14:33 +08002799 vmx_flush_tlb(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08002800 vmcs_writel(GUEST_CR3, guest_cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002801}
2802
Nadav Har'El5e1746d2011-05-25 23:03:24 +03002803static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002804{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002805 unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ?
Sheng Yang14394422008-04-28 12:24:45 +08002806 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
2807
Nadav Har'El5e1746d2011-05-25 23:03:24 +03002808 if (cr4 & X86_CR4_VMXE) {
2809 /*
2810 * To use VMXON (and later other VMX instructions), a guest
2811 * must first be able to turn on cr4.VMXE (see handle_vmon()).
2812 * So basically the check on whether to allow nested VMX
2813 * is here.
2814 */
2815 if (!nested_vmx_allowed(vcpu))
2816 return 1;
2817 } else if (to_vmx(vcpu)->nested.vmxon)
2818 return 1;
2819
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002820 vcpu->arch.cr4 = cr4;
Avi Kivitybc230082009-12-08 12:14:42 +02002821 if (enable_ept) {
2822 if (!is_paging(vcpu)) {
2823 hw_cr4 &= ~X86_CR4_PAE;
2824 hw_cr4 |= X86_CR4_PSE;
2825 } else if (!(cr4 & X86_CR4_PAE)) {
2826 hw_cr4 &= ~X86_CR4_PAE;
2827 }
2828 }
Sheng Yang14394422008-04-28 12:24:45 +08002829
2830 vmcs_writel(CR4_READ_SHADOW, cr4);
2831 vmcs_writel(GUEST_CR4, hw_cr4);
Nadav Har'El5e1746d2011-05-25 23:03:24 +03002832 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002833}
2834
Avi Kivity6aa8b732006-12-10 02:21:36 -08002835static void vmx_get_segment(struct kvm_vcpu *vcpu,
2836 struct kvm_segment *var, int seg)
2837{
Avi Kivitya9179492011-01-03 14:28:52 +02002838 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivitya9179492011-01-03 14:28:52 +02002839 struct kvm_save_segment *save;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002840 u32 ar;
2841
Avi Kivitya9179492011-01-03 14:28:52 +02002842 if (vmx->rmode.vm86_active
2843 && (seg == VCPU_SREG_TR || seg == VCPU_SREG_ES
2844 || seg == VCPU_SREG_DS || seg == VCPU_SREG_FS
2845 || seg == VCPU_SREG_GS)
2846 && !emulate_invalid_guest_state) {
2847 switch (seg) {
2848 case VCPU_SREG_TR: save = &vmx->rmode.tr; break;
2849 case VCPU_SREG_ES: save = &vmx->rmode.es; break;
2850 case VCPU_SREG_DS: save = &vmx->rmode.ds; break;
2851 case VCPU_SREG_FS: save = &vmx->rmode.fs; break;
2852 case VCPU_SREG_GS: save = &vmx->rmode.gs; break;
2853 default: BUG();
2854 }
2855 var->selector = save->selector;
2856 var->base = save->base;
2857 var->limit = save->limit;
2858 ar = save->ar;
2859 if (seg == VCPU_SREG_TR
Avi Kivity2fb92db2011-04-27 19:42:18 +03002860 || var->selector == vmx_read_guest_seg_selector(vmx, seg))
Avi Kivitya9179492011-01-03 14:28:52 +02002861 goto use_saved_rmode_seg;
2862 }
Avi Kivity2fb92db2011-04-27 19:42:18 +03002863 var->base = vmx_read_guest_seg_base(vmx, seg);
2864 var->limit = vmx_read_guest_seg_limit(vmx, seg);
2865 var->selector = vmx_read_guest_seg_selector(vmx, seg);
2866 ar = vmx_read_guest_seg_ar(vmx, seg);
Avi Kivitya9179492011-01-03 14:28:52 +02002867use_saved_rmode_seg:
Avi Kivity9fd4a3b2009-01-04 23:43:42 +02002868 if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002869 ar = 0;
2870 var->type = ar & 15;
2871 var->s = (ar >> 4) & 1;
2872 var->dpl = (ar >> 5) & 3;
2873 var->present = (ar >> 7) & 1;
2874 var->avl = (ar >> 12) & 1;
2875 var->l = (ar >> 13) & 1;
2876 var->db = (ar >> 14) & 1;
2877 var->g = (ar >> 15) & 1;
2878 var->unusable = (ar >> 16) & 1;
2879}
2880
Avi Kivitya9179492011-01-03 14:28:52 +02002881static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
2882{
Avi Kivitya9179492011-01-03 14:28:52 +02002883 struct kvm_segment s;
2884
2885 if (to_vmx(vcpu)->rmode.vm86_active) {
2886 vmx_get_segment(vcpu, &s, seg);
2887 return s.base;
2888 }
Avi Kivity2fb92db2011-04-27 19:42:18 +03002889 return vmx_read_guest_seg_base(to_vmx(vcpu), seg);
Avi Kivitya9179492011-01-03 14:28:52 +02002890}
2891
Avi Kivity69c73022011-03-07 15:26:44 +02002892static int __vmx_get_cpl(struct kvm_vcpu *vcpu)
Izik Eidus2e4d2652008-03-24 19:38:34 +02002893{
Avi Kivity3eeb3282010-01-21 15:31:48 +02002894 if (!is_protmode(vcpu))
Izik Eidus2e4d2652008-03-24 19:38:34 +02002895 return 0;
2896
Avi Kivityf4c63e52011-03-07 14:54:28 +02002897 if (!is_long_mode(vcpu)
2898 && (kvm_get_rflags(vcpu) & X86_EFLAGS_VM)) /* if virtual 8086 */
Izik Eidus2e4d2652008-03-24 19:38:34 +02002899 return 3;
2900
Avi Kivity2fb92db2011-04-27 19:42:18 +03002901 return vmx_read_guest_seg_selector(to_vmx(vcpu), VCPU_SREG_CS) & 3;
Izik Eidus2e4d2652008-03-24 19:38:34 +02002902}
2903
Avi Kivity69c73022011-03-07 15:26:44 +02002904static int vmx_get_cpl(struct kvm_vcpu *vcpu)
2905{
2906 if (!test_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail)) {
2907 __set_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
2908 to_vmx(vcpu)->cpl = __vmx_get_cpl(vcpu);
2909 }
2910 return to_vmx(vcpu)->cpl;
2911}
2912
2913
Avi Kivity653e3102007-05-07 10:55:37 +03002914static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002915{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002916 u32 ar;
2917
Avi Kivity653e3102007-05-07 10:55:37 +03002918 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002919 ar = 1 << 16;
2920 else {
2921 ar = var->type & 15;
2922 ar |= (var->s & 1) << 4;
2923 ar |= (var->dpl & 3) << 5;
2924 ar |= (var->present & 1) << 7;
2925 ar |= (var->avl & 1) << 12;
2926 ar |= (var->l & 1) << 13;
2927 ar |= (var->db & 1) << 14;
2928 ar |= (var->g & 1) << 15;
2929 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08002930 if (ar == 0) /* a 0 value means unusable */
2931 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03002932
2933 return ar;
2934}
2935
2936static void vmx_set_segment(struct kvm_vcpu *vcpu,
2937 struct kvm_segment *var, int seg)
2938{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002939 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity653e3102007-05-07 10:55:37 +03002940 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2941 u32 ar;
2942
Avi Kivity2fb92db2011-04-27 19:42:18 +03002943 vmx_segment_cache_clear(vmx);
2944
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002945 if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) {
Gleb Natapova8ba6c22011-02-21 12:07:58 +02002946 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002947 vmx->rmode.tr.selector = var->selector;
2948 vmx->rmode.tr.base = var->base;
2949 vmx->rmode.tr.limit = var->limit;
2950 vmx->rmode.tr.ar = vmx_segment_access_rights(var);
Avi Kivity653e3102007-05-07 10:55:37 +03002951 return;
2952 }
2953 vmcs_writel(sf->base, var->base);
2954 vmcs_write32(sf->limit, var->limit);
2955 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002956 if (vmx->rmode.vm86_active && var->s) {
Avi Kivity653e3102007-05-07 10:55:37 +03002957 /*
2958 * Hack real-mode segments into vm86 compatibility.
2959 */
2960 if (var->base == 0xffff0000 && var->selector == 0xf000)
2961 vmcs_writel(sf->base, 0xf0000);
2962 ar = 0xf3;
2963 } else
2964 ar = vmx_segment_access_rights(var);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002965
2966 /*
2967 * Fix the "Accessed" bit in AR field of segment registers for older
2968 * qemu binaries.
2969 * IA32 arch specifies that at the time of processor reset the
2970 * "Accessed" bit in the AR field of segment registers is 1. And qemu
2971 * is setting it to 0 in the usedland code. This causes invalid guest
2972 * state vmexit when "unrestricted guest" mode is turned on.
2973 * Fix for this setup issue in cpu_reset is being pushed in the qemu
2974 * tree. Newer qemu binaries with that qemu fix would not need this
2975 * kvm hack.
2976 */
2977 if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR))
2978 ar |= 0x1; /* Accessed */
2979
Avi Kivity6aa8b732006-12-10 02:21:36 -08002980 vmcs_write32(sf->ar_bytes, ar);
Avi Kivity69c73022011-03-07 15:26:44 +02002981 __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002982}
2983
Avi Kivity6aa8b732006-12-10 02:21:36 -08002984static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2985{
Avi Kivity2fb92db2011-04-27 19:42:18 +03002986 u32 ar = vmx_read_guest_seg_ar(to_vmx(vcpu), VCPU_SREG_CS);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002987
2988 *db = (ar >> 14) & 1;
2989 *l = (ar >> 13) & 1;
2990}
2991
Gleb Natapov89a27f42010-02-16 10:51:48 +02002992static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002993{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002994 dt->size = vmcs_read32(GUEST_IDTR_LIMIT);
2995 dt->address = vmcs_readl(GUEST_IDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002996}
2997
Gleb Natapov89a27f42010-02-16 10:51:48 +02002998static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002999{
Gleb Natapov89a27f42010-02-16 10:51:48 +02003000 vmcs_write32(GUEST_IDTR_LIMIT, dt->size);
3001 vmcs_writel(GUEST_IDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003002}
3003
Gleb Natapov89a27f42010-02-16 10:51:48 +02003004static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003005{
Gleb Natapov89a27f42010-02-16 10:51:48 +02003006 dt->size = vmcs_read32(GUEST_GDTR_LIMIT);
3007 dt->address = vmcs_readl(GUEST_GDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003008}
3009
Gleb Natapov89a27f42010-02-16 10:51:48 +02003010static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003011{
Gleb Natapov89a27f42010-02-16 10:51:48 +02003012 vmcs_write32(GUEST_GDTR_LIMIT, dt->size);
3013 vmcs_writel(GUEST_GDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003014}
3015
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003016static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
3017{
3018 struct kvm_segment var;
3019 u32 ar;
3020
3021 vmx_get_segment(vcpu, &var, seg);
3022 ar = vmx_segment_access_rights(&var);
3023
3024 if (var.base != (var.selector << 4))
3025 return false;
3026 if (var.limit != 0xffff)
3027 return false;
3028 if (ar != 0xf3)
3029 return false;
3030
3031 return true;
3032}
3033
3034static bool code_segment_valid(struct kvm_vcpu *vcpu)
3035{
3036 struct kvm_segment cs;
3037 unsigned int cs_rpl;
3038
3039 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
3040 cs_rpl = cs.selector & SELECTOR_RPL_MASK;
3041
Avi Kivity1872a3f2009-01-04 23:26:52 +02003042 if (cs.unusable)
3043 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003044 if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
3045 return false;
3046 if (!cs.s)
3047 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02003048 if (cs.type & AR_TYPE_WRITEABLE_MASK) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003049 if (cs.dpl > cs_rpl)
3050 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02003051 } else {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003052 if (cs.dpl != cs_rpl)
3053 return false;
3054 }
3055 if (!cs.present)
3056 return false;
3057
3058 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
3059 return true;
3060}
3061
3062static bool stack_segment_valid(struct kvm_vcpu *vcpu)
3063{
3064 struct kvm_segment ss;
3065 unsigned int ss_rpl;
3066
3067 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
3068 ss_rpl = ss.selector & SELECTOR_RPL_MASK;
3069
Avi Kivity1872a3f2009-01-04 23:26:52 +02003070 if (ss.unusable)
3071 return true;
3072 if (ss.type != 3 && ss.type != 7)
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003073 return false;
3074 if (!ss.s)
3075 return false;
3076 if (ss.dpl != ss_rpl) /* DPL != RPL */
3077 return false;
3078 if (!ss.present)
3079 return false;
3080
3081 return true;
3082}
3083
3084static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
3085{
3086 struct kvm_segment var;
3087 unsigned int rpl;
3088
3089 vmx_get_segment(vcpu, &var, seg);
3090 rpl = var.selector & SELECTOR_RPL_MASK;
3091
Avi Kivity1872a3f2009-01-04 23:26:52 +02003092 if (var.unusable)
3093 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003094 if (!var.s)
3095 return false;
3096 if (!var.present)
3097 return false;
3098 if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
3099 if (var.dpl < rpl) /* DPL < RPL */
3100 return false;
3101 }
3102
3103 /* TODO: Add other members to kvm_segment_field to allow checking for other access
3104 * rights flags
3105 */
3106 return true;
3107}
3108
3109static bool tr_valid(struct kvm_vcpu *vcpu)
3110{
3111 struct kvm_segment tr;
3112
3113 vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);
3114
Avi Kivity1872a3f2009-01-04 23:26:52 +02003115 if (tr.unusable)
3116 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003117 if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */
3118 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02003119 if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003120 return false;
3121 if (!tr.present)
3122 return false;
3123
3124 return true;
3125}
3126
3127static bool ldtr_valid(struct kvm_vcpu *vcpu)
3128{
3129 struct kvm_segment ldtr;
3130
3131 vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);
3132
Avi Kivity1872a3f2009-01-04 23:26:52 +02003133 if (ldtr.unusable)
3134 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003135 if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */
3136 return false;
3137 if (ldtr.type != 2)
3138 return false;
3139 if (!ldtr.present)
3140 return false;
3141
3142 return true;
3143}
3144
3145static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
3146{
3147 struct kvm_segment cs, ss;
3148
3149 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
3150 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
3151
3152 return ((cs.selector & SELECTOR_RPL_MASK) ==
3153 (ss.selector & SELECTOR_RPL_MASK));
3154}
3155
3156/*
3157 * Check if guest state is valid. Returns true if valid, false if
3158 * not.
3159 * We assume that registers are always usable
3160 */
3161static bool guest_state_valid(struct kvm_vcpu *vcpu)
3162{
3163 /* real mode guest state checks */
Avi Kivity3eeb3282010-01-21 15:31:48 +02003164 if (!is_protmode(vcpu)) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03003165 if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
3166 return false;
3167 if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
3168 return false;
3169 if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
3170 return false;
3171 if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
3172 return false;
3173 if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
3174 return false;
3175 if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
3176 return false;
3177 } else {
3178 /* protected mode guest state checks */
3179 if (!cs_ss_rpl_check(vcpu))
3180 return false;
3181 if (!code_segment_valid(vcpu))
3182 return false;
3183 if (!stack_segment_valid(vcpu))
3184 return false;
3185 if (!data_segment_valid(vcpu, VCPU_SREG_DS))
3186 return false;
3187 if (!data_segment_valid(vcpu, VCPU_SREG_ES))
3188 return false;
3189 if (!data_segment_valid(vcpu, VCPU_SREG_FS))
3190 return false;
3191 if (!data_segment_valid(vcpu, VCPU_SREG_GS))
3192 return false;
3193 if (!tr_valid(vcpu))
3194 return false;
3195 if (!ldtr_valid(vcpu))
3196 return false;
3197 }
3198 /* TODO:
3199 * - Add checks on RIP
3200 * - Add checks on RFLAGS
3201 */
3202
3203 return true;
3204}
3205
Mike Dayd77c26f2007-10-08 09:02:08 -04003206static int init_rmode_tss(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003207{
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003208 gfn_t fn;
Izik Eidus195aefd2007-10-01 22:14:18 +02003209 u16 data = 0;
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003210 int r, idx, ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003211
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003212 idx = srcu_read_lock(&kvm->srcu);
3213 fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
Izik Eidus195aefd2007-10-01 22:14:18 +02003214 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
3215 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003216 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02003217 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
Sheng Yang464d17c2008-08-13 14:10:33 +08003218 r = kvm_write_guest_page(kvm, fn++, &data,
3219 TSS_IOPB_BASE_OFFSET, sizeof(u16));
Izik Eidus195aefd2007-10-01 22:14:18 +02003220 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003221 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02003222 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
3223 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003224 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02003225 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
3226 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003227 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02003228 data = ~0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003229 r = kvm_write_guest_page(kvm, fn, &data,
3230 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
3231 sizeof(u8));
Izik Eidus195aefd2007-10-01 22:14:18 +02003232 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003233 goto out;
3234
3235 ret = 1;
3236out:
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003237 srcu_read_unlock(&kvm->srcu, idx);
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003238 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003239}
3240
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003241static int init_rmode_identity_map(struct kvm *kvm)
3242{
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003243 int i, idx, r, ret;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003244 pfn_t identity_map_pfn;
3245 u32 tmp;
3246
Avi Kivity089d0342009-03-23 18:26:32 +02003247 if (!enable_ept)
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003248 return 1;
3249 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
3250 printk(KERN_ERR "EPT: identity-mapping pagetable "
3251 "haven't been allocated!\n");
3252 return 0;
3253 }
3254 if (likely(kvm->arch.ept_identity_pagetable_done))
3255 return 1;
3256 ret = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08003257 identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003258 idx = srcu_read_lock(&kvm->srcu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003259 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
3260 if (r < 0)
3261 goto out;
3262 /* Set up identity-mapping pagetable for EPT in real mode */
3263 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
3264 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
3265 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
3266 r = kvm_write_guest_page(kvm, identity_map_pfn,
3267 &tmp, i * sizeof(tmp), sizeof(tmp));
3268 if (r < 0)
3269 goto out;
3270 }
3271 kvm->arch.ept_identity_pagetable_done = true;
3272 ret = 1;
3273out:
Xiao Guangrong40dcaa92011-03-09 15:41:04 +08003274 srcu_read_unlock(&kvm->srcu, idx);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003275 return ret;
3276}
3277
Avi Kivity6aa8b732006-12-10 02:21:36 -08003278static void seg_setup(int seg)
3279{
3280 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
Nitin A Kamble3a624e22009-06-08 11:34:16 -07003281 unsigned int ar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003282
3283 vmcs_write16(sf->selector, 0);
3284 vmcs_writel(sf->base, 0);
3285 vmcs_write32(sf->limit, 0xffff);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07003286 if (enable_unrestricted_guest) {
3287 ar = 0x93;
3288 if (seg == VCPU_SREG_CS)
3289 ar |= 0x08; /* code segment */
3290 } else
3291 ar = 0xf3;
3292
3293 vmcs_write32(sf->ar_bytes, ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003294}
3295
Sheng Yangf78e0e22007-10-29 09:40:42 +08003296static int alloc_apic_access_page(struct kvm *kvm)
3297{
3298 struct kvm_userspace_memory_region kvm_userspace_mem;
3299 int r = 0;
3300
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003301 mutex_lock(&kvm->slots_lock);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08003302 if (kvm->arch.apic_access_page)
Sheng Yangf78e0e22007-10-29 09:40:42 +08003303 goto out;
3304 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
3305 kvm_userspace_mem.flags = 0;
3306 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
3307 kvm_userspace_mem.memory_size = PAGE_SIZE;
3308 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
3309 if (r)
3310 goto out;
Izik Eidus72dc67a2008-02-10 18:04:15 +02003311
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08003312 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
Sheng Yangf78e0e22007-10-29 09:40:42 +08003313out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003314 mutex_unlock(&kvm->slots_lock);
Sheng Yangf78e0e22007-10-29 09:40:42 +08003315 return r;
3316}
3317
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003318static int alloc_identity_pagetable(struct kvm *kvm)
3319{
3320 struct kvm_userspace_memory_region kvm_userspace_mem;
3321 int r = 0;
3322
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003323 mutex_lock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003324 if (kvm->arch.ept_identity_pagetable)
3325 goto out;
3326 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
3327 kvm_userspace_mem.flags = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08003328 kvm_userspace_mem.guest_phys_addr =
3329 kvm->arch.ept_identity_map_addr;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003330 kvm_userspace_mem.memory_size = PAGE_SIZE;
3331 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
3332 if (r)
3333 goto out;
3334
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003335 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
Sheng Yangb927a3c2009-07-21 10:42:48 +08003336 kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003337out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003338 mutex_unlock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003339 return r;
3340}
3341
Sheng Yang2384d2b2008-01-17 15:14:33 +08003342static void allocate_vpid(struct vcpu_vmx *vmx)
3343{
3344 int vpid;
3345
3346 vmx->vpid = 0;
Avi Kivity919818a2009-03-23 18:01:29 +02003347 if (!enable_vpid)
Sheng Yang2384d2b2008-01-17 15:14:33 +08003348 return;
3349 spin_lock(&vmx_vpid_lock);
3350 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
3351 if (vpid < VMX_NR_VPIDS) {
3352 vmx->vpid = vpid;
3353 __set_bit(vpid, vmx_vpid_bitmap);
3354 }
3355 spin_unlock(&vmx_vpid_lock);
3356}
3357
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08003358static void free_vpid(struct vcpu_vmx *vmx)
3359{
3360 if (!enable_vpid)
3361 return;
3362 spin_lock(&vmx_vpid_lock);
3363 if (vmx->vpid != 0)
3364 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
3365 spin_unlock(&vmx_vpid_lock);
3366}
3367
Avi Kivity58972972009-02-24 22:26:47 +02003368static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr)
Sheng Yang25c5f222008-03-28 13:18:56 +08003369{
Avi Kivity3e7c73e2009-02-24 21:46:19 +02003370 int f = sizeof(unsigned long);
Sheng Yang25c5f222008-03-28 13:18:56 +08003371
3372 if (!cpu_has_vmx_msr_bitmap())
3373 return;
3374
3375 /*
3376 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
3377 * have the write-low and read-high bitmap offsets the wrong way round.
3378 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
3379 */
Sheng Yang25c5f222008-03-28 13:18:56 +08003380 if (msr <= 0x1fff) {
Avi Kivity3e7c73e2009-02-24 21:46:19 +02003381 __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */
3382 __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */
Sheng Yang25c5f222008-03-28 13:18:56 +08003383 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
3384 msr &= 0x1fff;
Avi Kivity3e7c73e2009-02-24 21:46:19 +02003385 __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */
3386 __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */
Sheng Yang25c5f222008-03-28 13:18:56 +08003387 }
Sheng Yang25c5f222008-03-28 13:18:56 +08003388}
3389
Avi Kivity58972972009-02-24 22:26:47 +02003390static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only)
3391{
3392 if (!longmode_only)
3393 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr);
3394 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr);
3395}
3396
Avi Kivity6aa8b732006-12-10 02:21:36 -08003397/*
3398 * Sets up the vmcs for emulated real mode.
3399 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10003400static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003401{
Sheng Yang468d4722008-10-09 16:01:55 +08003402 u32 host_sysenter_cs, msr_low, msr_high;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003403 u32 junk;
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10003404 u64 host_pat;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003405 unsigned long a;
Gleb Natapov89a27f42010-02-16 10:51:48 +02003406 struct desc_ptr dt;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003407 int i;
Avi Kivitycd2276a2007-05-14 20:41:13 +03003408 unsigned long kvm_vmx_return;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003409 u32 exec_control;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003410
Avi Kivity6aa8b732006-12-10 02:21:36 -08003411 /* I/O */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02003412 vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a));
3413 vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08003414
Sheng Yang25c5f222008-03-28 13:18:56 +08003415 if (cpu_has_vmx_msr_bitmap())
Avi Kivity58972972009-02-24 22:26:47 +02003416 vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy));
Sheng Yang25c5f222008-03-28 13:18:56 +08003417
Avi Kivity6aa8b732006-12-10 02:21:36 -08003418 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
3419
Avi Kivity6aa8b732006-12-10 02:21:36 -08003420 /* Control */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03003421 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
3422 vmcs_config.pin_based_exec_ctrl);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003423
3424 exec_control = vmcs_config.cpu_based_exec_ctrl;
3425 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
3426 exec_control &= ~CPU_BASED_TPR_SHADOW;
3427#ifdef CONFIG_X86_64
3428 exec_control |= CPU_BASED_CR8_STORE_EXITING |
3429 CPU_BASED_CR8_LOAD_EXITING;
3430#endif
3431 }
Avi Kivity089d0342009-03-23 18:26:32 +02003432 if (!enable_ept)
Sheng Yangd56f5462008-04-25 10:13:16 +08003433 exec_control |= CPU_BASED_CR3_STORE_EXITING |
Marcelo Tosatti83dbc832008-10-07 17:01:27 -03003434 CPU_BASED_CR3_LOAD_EXITING |
3435 CPU_BASED_INVLPG_EXITING;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003436 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003437
Sheng Yang83ff3b92007-11-21 14:33:25 +08003438 if (cpu_has_secondary_exec_ctrls()) {
3439 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
3440 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
3441 exec_control &=
3442 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
Sheng Yang2384d2b2008-01-17 15:14:33 +08003443 if (vmx->vpid == 0)
3444 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang046d8712009-11-27 16:46:26 +08003445 if (!enable_ept) {
Sheng Yangd56f5462008-04-25 10:13:16 +08003446 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
Sheng Yang046d8712009-11-27 16:46:26 +08003447 enable_unrestricted_guest = 0;
3448 }
Nitin A Kamble3a624e22009-06-08 11:34:16 -07003449 if (!enable_unrestricted_guest)
3450 exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003451 if (!ple_gap)
3452 exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
Sheng Yang83ff3b92007-11-21 14:33:25 +08003453 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
3454 }
Sheng Yangf78e0e22007-10-29 09:40:42 +08003455
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003456 if (ple_gap) {
3457 vmcs_write32(PLE_GAP, ple_gap);
3458 vmcs_write32(PLE_WINDOW, ple_window);
3459 }
3460
Avi Kivityc7addb92007-09-16 18:58:32 +02003461 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
3462 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003463 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
3464
Avi Kivity1c11e712010-05-03 16:05:44 +03003465 vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08003466 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
3467 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
3468
3469 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
3470 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
3471 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity9581d442010-10-19 16:46:55 +02003472 vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */
3473 vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08003474 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003475#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08003476 rdmsrl(MSR_FS_BASE, a);
3477 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
3478 rdmsrl(MSR_GS_BASE, a);
3479 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
3480#else
3481 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
3482 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
3483#endif
3484
3485 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
3486
Wei Yongjunec687982010-03-05 12:11:48 +08003487 native_store_idt(&dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02003488 vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08003489
Mike Dayd77c26f2007-10-08 09:02:08 -04003490 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
Avi Kivitycd2276a2007-05-14 20:41:13 +03003491 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03003492 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
3493 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03003494 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host));
Eddie Dong2cc51562007-05-21 07:28:09 +03003495 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03003496 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest));
Avi Kivity6aa8b732006-12-10 02:21:36 -08003497
3498 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
3499 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
3500 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
3501 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
3502 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
3503 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
3504
Sheng Yang468d4722008-10-09 16:01:55 +08003505 if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
3506 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
3507 host_pat = msr_low | ((u64) msr_high << 32);
3508 vmcs_write64(HOST_IA32_PAT, host_pat);
3509 }
3510 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
3511 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
3512 host_pat = msr_low | ((u64) msr_high << 32);
3513 /* Write the default value follow host pat */
3514 vmcs_write64(GUEST_IA32_PAT, host_pat);
3515 /* Keep arch.pat sync with GUEST_IA32_PAT */
3516 vmx->vcpu.arch.pat = host_pat;
3517 }
3518
Avi Kivity6aa8b732006-12-10 02:21:36 -08003519 for (i = 0; i < NR_VMX_MSR; ++i) {
3520 u32 index = vmx_msr_index[i];
3521 u32 data_low, data_high;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003522 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003523
3524 if (rdmsr_safe(index, &data_low, &data_high) < 0)
3525 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08003526 if (wrmsr_safe(index, data_low, data_high) < 0)
3527 continue;
Avi Kivity26bb0982009-09-07 11:14:12 +03003528 vmx->guest_msrs[j].index = i;
3529 vmx->guest_msrs[j].data = 0;
Avi Kivityd5696722009-12-02 12:28:47 +02003530 vmx->guest_msrs[j].mask = -1ull;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003531 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003532 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003533
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03003534 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003535
3536 /* 22.2.1, 20.8.1 */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03003537 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
3538
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003539 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
Avi Kivity4c386092009-12-07 12:26:18 +02003540 vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS;
Avi Kivityce03e4f2009-12-07 12:29:14 +02003541 if (enable_ept)
3542 vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE;
Avi Kivity4c386092009-12-07 12:26:18 +02003543 vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003544
Zachary Amsden99e3e302010-08-19 22:07:17 -10003545 kvm_write_tsc(&vmx->vcpu, 0);
Sheng Yangf78e0e22007-10-29 09:40:42 +08003546
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003547 return 0;
3548}
3549
3550static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
3551{
3552 struct vcpu_vmx *vmx = to_vmx(vcpu);
3553 u64 msr;
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08003554 int ret;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003555
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003556 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003557
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003558 vmx->rmode.vm86_active = 0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003559
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003560 vmx->soft_vnmi_blocked = 0;
3561
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003562 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02003563 kvm_set_cr8(&vmx->vcpu, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003564 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03003565 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003566 msr |= MSR_IA32_APICBASE_BSP;
3567 kvm_set_apic_base(&vmx->vcpu, msr);
3568
Jan Kiszka10ab25c2010-05-25 16:01:50 +02003569 ret = fx_init(&vmx->vcpu);
3570 if (ret != 0)
3571 goto out;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003572
Avi Kivity2fb92db2011-04-27 19:42:18 +03003573 vmx_segment_cache_clear(vmx);
3574
Avi Kivity5706be02008-08-20 15:07:31 +03003575 seg_setup(VCPU_SREG_CS);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003576 /*
3577 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
3578 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
3579 */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03003580 if (kvm_vcpu_is_bsp(&vmx->vcpu)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003581 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
3582 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
3583 } else {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003584 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
3585 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003586 }
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003587
3588 seg_setup(VCPU_SREG_DS);
3589 seg_setup(VCPU_SREG_ES);
3590 seg_setup(VCPU_SREG_FS);
3591 seg_setup(VCPU_SREG_GS);
3592 seg_setup(VCPU_SREG_SS);
3593
3594 vmcs_write16(GUEST_TR_SELECTOR, 0);
3595 vmcs_writel(GUEST_TR_BASE, 0);
3596 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
3597 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
3598
3599 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
3600 vmcs_writel(GUEST_LDTR_BASE, 0);
3601 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
3602 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
3603
3604 vmcs_write32(GUEST_SYSENTER_CS, 0);
3605 vmcs_writel(GUEST_SYSENTER_ESP, 0);
3606 vmcs_writel(GUEST_SYSENTER_EIP, 0);
3607
3608 vmcs_writel(GUEST_RFLAGS, 0x02);
Gleb Natapovc5af89b2009-06-09 15:56:26 +03003609 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003610 kvm_rip_write(vcpu, 0xfff0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003611 else
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003612 kvm_rip_write(vcpu, 0);
3613 kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003614
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003615 vmcs_writel(GUEST_DR7, 0x400);
3616
3617 vmcs_writel(GUEST_GDTR_BASE, 0);
3618 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
3619
3620 vmcs_writel(GUEST_IDTR_BASE, 0);
3621 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
3622
Anthony Liguori443381a2010-12-06 10:53:38 -06003623 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003624 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
3625 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
3626
Avi Kivitye00c8cf2007-10-21 11:00:39 +02003627 /* Special registers */
3628 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
3629
3630 setup_msrs(vmx);
3631
Avi Kivity6aa8b732006-12-10 02:21:36 -08003632 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
3633
Sheng Yangf78e0e22007-10-29 09:40:42 +08003634 if (cpu_has_vmx_tpr_shadow()) {
3635 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
3636 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
3637 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
Takuya Yoshikawaafc20182011-03-05 12:40:20 +09003638 __pa(vmx->vcpu.arch.apic->regs));
Sheng Yangf78e0e22007-10-29 09:40:42 +08003639 vmcs_write32(TPR_THRESHOLD, 0);
3640 }
3641
3642 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
3643 vmcs_write64(APIC_ACCESS_ADDR,
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08003644 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
Avi Kivity6aa8b732006-12-10 02:21:36 -08003645
Sheng Yang2384d2b2008-01-17 15:14:33 +08003646 if (vmx->vpid != 0)
3647 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
3648
Eduardo Habkostfa400522009-10-24 02:49:58 -02003649 vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
Avi Kivity4d4ec082009-12-29 18:07:30 +02003650 vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
Rusty Russell8b9cf982007-07-30 16:31:43 +10003651 vmx_set_cr4(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10003652 vmx_set_efer(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10003653 vmx_fpu_activate(&vmx->vcpu);
3654 update_exception_bitmap(&vmx->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003655
Gui Jianfengb9d762f2010-06-07 10:32:29 +08003656 vpid_sync_context(vmx);
Sheng Yang2384d2b2008-01-17 15:14:33 +08003657
Marcelo Tosatti3200f402008-03-29 20:17:59 -03003658 ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003659
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03003660 /* HACK: Don't enable emulation on guest boot/reset */
3661 vmx->emulation_required = 0;
3662
Avi Kivity6aa8b732006-12-10 02:21:36 -08003663out:
3664 return ret;
3665}
3666
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003667static void enable_irq_window(struct kvm_vcpu *vcpu)
3668{
3669 u32 cpu_based_vm_exec_control;
3670
3671 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3672 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
3673 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
3674}
3675
3676static void enable_nmi_window(struct kvm_vcpu *vcpu)
3677{
3678 u32 cpu_based_vm_exec_control;
3679
3680 if (!cpu_has_virtual_nmis()) {
3681 enable_irq_window(vcpu);
3682 return;
3683 }
3684
Avi Kivity30bd0c42010-11-01 23:20:48 +02003685 if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) {
3686 enable_irq_window(vcpu);
3687 return;
3688 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003689 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3690 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
3691 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
3692}
3693
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003694static void vmx_inject_irq(struct kvm_vcpu *vcpu)
Eddie Dong85f455f2007-07-06 12:20:49 +03003695{
Avi Kivity9c8cba32007-11-22 11:42:59 +02003696 struct vcpu_vmx *vmx = to_vmx(vcpu);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003697 uint32_t intr;
3698 int irq = vcpu->arch.interrupt.nr;
Avi Kivity9c8cba32007-11-22 11:42:59 +02003699
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003700 trace_kvm_inj_virq(irq);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003701
Avi Kivityfa89a812008-09-01 15:57:51 +03003702 ++vcpu->stat.irq_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003703 if (vmx->rmode.vm86_active) {
Serge E. Hallyn71f98332011-04-13 09:12:54 -05003704 int inc_eip = 0;
3705 if (vcpu->arch.interrupt.soft)
3706 inc_eip = vcpu->arch.event_exit_inst_len;
3707 if (kvm_inject_realmode_interrupt(vcpu, irq, inc_eip) != EMULATE_DONE)
Mohammed Gamala92601b2010-09-19 14:34:07 +02003708 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03003709 return;
3710 }
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003711 intr = irq | INTR_INFO_VALID_MASK;
3712 if (vcpu->arch.interrupt.soft) {
3713 intr |= INTR_TYPE_SOFT_INTR;
3714 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
3715 vmx->vcpu.arch.event_exit_inst_len);
3716 } else
3717 intr |= INTR_TYPE_EXT_INTR;
3718 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
Anthony Liguori443381a2010-12-06 10:53:38 -06003719 vmx_clear_hlt(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03003720}
3721
Sheng Yangf08864b2008-05-15 18:23:25 +08003722static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
3723{
Jan Kiszka66a5a342008-09-26 09:30:51 +02003724 struct vcpu_vmx *vmx = to_vmx(vcpu);
3725
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003726 if (!cpu_has_virtual_nmis()) {
3727 /*
3728 * Tracking the NMI-blocked state in software is built upon
3729 * finding the next open IRQ window. This, in turn, depends on
3730 * well-behaving guests: They have to keep IRQs disabled at
3731 * least as long as the NMI handler runs. Otherwise we may
3732 * cause NMI nesting, maybe breaking the guest. But as this is
3733 * highly unlikely, we can live with the residual risk.
3734 */
3735 vmx->soft_vnmi_blocked = 1;
3736 vmx->vnmi_blocked_time = 0;
3737 }
3738
Jan Kiszka487b3912008-09-26 09:30:56 +02003739 ++vcpu->stat.nmi_injections;
Avi Kivity9d58b932011-03-07 16:52:07 +02003740 vmx->nmi_known_unmasked = false;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003741 if (vmx->rmode.vm86_active) {
Serge E. Hallyn71f98332011-04-13 09:12:54 -05003742 if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE)
Mohammed Gamala92601b2010-09-19 14:34:07 +02003743 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka66a5a342008-09-26 09:30:51 +02003744 return;
3745 }
Sheng Yangf08864b2008-05-15 18:23:25 +08003746 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
3747 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
Anthony Liguori443381a2010-12-06 10:53:38 -06003748 vmx_clear_hlt(vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08003749}
3750
Gleb Natapovc4282df2009-04-21 17:45:07 +03003751static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
Jan Kiszka33f089c2008-09-26 09:30:49 +02003752{
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003753 if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
Gleb Natapovc4282df2009-04-21 17:45:07 +03003754 return 0;
Jan Kiszka33f089c2008-09-26 09:30:49 +02003755
Gleb Natapovc4282df2009-04-21 17:45:07 +03003756 return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
Avi Kivity30bd0c42010-11-01 23:20:48 +02003757 (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI
3758 | GUEST_INTR_STATE_NMI));
Jan Kiszka33f089c2008-09-26 09:30:49 +02003759}
3760
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003761static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
3762{
3763 if (!cpu_has_virtual_nmis())
3764 return to_vmx(vcpu)->soft_vnmi_blocked;
Avi Kivity9d58b932011-03-07 16:52:07 +02003765 if (to_vmx(vcpu)->nmi_known_unmasked)
3766 return false;
Avi Kivityc332c832010-05-04 12:24:12 +03003767 return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003768}
3769
3770static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
3771{
3772 struct vcpu_vmx *vmx = to_vmx(vcpu);
3773
3774 if (!cpu_has_virtual_nmis()) {
3775 if (vmx->soft_vnmi_blocked != masked) {
3776 vmx->soft_vnmi_blocked = masked;
3777 vmx->vnmi_blocked_time = 0;
3778 }
3779 } else {
Avi Kivity9d58b932011-03-07 16:52:07 +02003780 vmx->nmi_known_unmasked = !masked;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003781 if (masked)
3782 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3783 GUEST_INTR_STATE_NMI);
3784 else
3785 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
3786 GUEST_INTR_STATE_NMI);
3787 }
3788}
3789
Gleb Natapov78646122009-03-23 12:12:11 +02003790static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
3791{
Gleb Natapovc4282df2009-04-21 17:45:07 +03003792 return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
3793 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
3794 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
Gleb Natapov78646122009-03-23 12:12:11 +02003795}
3796
Izik Eiduscbc94022007-10-25 00:29:55 +02003797static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
3798{
3799 int ret;
3800 struct kvm_userspace_memory_region tss_mem = {
Sheng Yang6fe63972008-10-16 17:30:58 +08003801 .slot = TSS_PRIVATE_MEMSLOT,
Izik Eiduscbc94022007-10-25 00:29:55 +02003802 .guest_phys_addr = addr,
3803 .memory_size = PAGE_SIZE * 3,
3804 .flags = 0,
3805 };
3806
3807 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
3808 if (ret)
3809 return ret;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08003810 kvm->arch.tss_addr = addr;
Gleb Natapov93ea5382011-02-21 12:07:59 +02003811 if (!init_rmode_tss(kvm))
3812 return -ENOMEM;
3813
Izik Eiduscbc94022007-10-25 00:29:55 +02003814 return 0;
3815}
3816
Avi Kivity6aa8b732006-12-10 02:21:36 -08003817static int handle_rmode_exception(struct kvm_vcpu *vcpu,
3818 int vec, u32 err_code)
3819{
Nitin A Kambleb3f37702007-05-17 15:50:34 +03003820 /*
3821 * Instruction with address size override prefix opcode 0x67
3822 * Cause the #SS fault with 0 error code in VM86 mode.
3823 */
3824 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Andre Przywara51d8b662010-12-21 11:12:02 +01003825 if (emulate_instruction(vcpu, 0) == EMULATE_DONE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003826 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003827 /*
3828 * Forward all other exceptions that are valid in real mode.
3829 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
3830 * the required debugging infrastructure rework.
3831 */
3832 switch (vec) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003833 case DB_VECTOR:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003834 if (vcpu->guest_debug &
3835 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
3836 return 0;
3837 kvm_queue_exception(vcpu, vec);
3838 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003839 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01003840 /*
3841 * Update instruction length as we may reinject the exception
3842 * from user space while in guest debugging mode.
3843 */
3844 to_vmx(vcpu)->vcpu.arch.event_exit_inst_len =
3845 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003846 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
3847 return 0;
3848 /* fall through */
3849 case DE_VECTOR:
Jan Kiszka77ab6db2008-07-14 12:28:51 +02003850 case OF_VECTOR:
3851 case BR_VECTOR:
3852 case UD_VECTOR:
3853 case DF_VECTOR:
3854 case SS_VECTOR:
3855 case GP_VECTOR:
3856 case MF_VECTOR:
3857 kvm_queue_exception(vcpu, vec);
3858 return 1;
3859 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003860 return 0;
3861}
3862
Andi Kleena0861c02009-06-08 17:37:09 +08003863/*
3864 * Trigger machine check on the host. We assume all the MSRs are already set up
3865 * by the CPU and that we still run on the same CPU as the MCE occurred on.
3866 * We pass a fake environment to the machine check handler because we want
3867 * the guest to be always treated like user space, no matter what context
3868 * it used internally.
3869 */
3870static void kvm_machine_check(void)
3871{
3872#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
3873 struct pt_regs regs = {
3874 .cs = 3, /* Fake ring 3 no matter what the guest ran on */
3875 .flags = X86_EFLAGS_IF,
3876 };
3877
3878 do_machine_check(&regs, 0);
3879#endif
3880}
3881
Avi Kivity851ba692009-08-24 11:10:17 +03003882static int handle_machine_check(struct kvm_vcpu *vcpu)
Andi Kleena0861c02009-06-08 17:37:09 +08003883{
3884 /* already handled by vcpu_run */
3885 return 1;
3886}
3887
Avi Kivity851ba692009-08-24 11:10:17 +03003888static int handle_exception(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003889{
Avi Kivity1155f762007-11-22 11:30:47 +02003890 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03003891 struct kvm_run *kvm_run = vcpu->run;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003892 u32 intr_info, ex_no, error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003893 unsigned long cr2, rip, dr6;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003894 u32 vect_info;
3895 enum emulation_result er;
3896
Avi Kivity1155f762007-11-22 11:30:47 +02003897 vect_info = vmx->idt_vectoring_info;
Avi Kivity88786472011-03-07 17:39:45 +02003898 intr_info = vmx->exit_intr_info;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003899
Andi Kleena0861c02009-06-08 17:37:09 +08003900 if (is_machine_check(intr_info))
Avi Kivity851ba692009-08-24 11:10:17 +03003901 return handle_machine_check(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003902
Avi Kivity6aa8b732006-12-10 02:21:36 -08003903 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
Avi Kivity65ac7262009-11-04 11:59:01 +02003904 !is_page_fault(intr_info)) {
3905 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3906 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX;
3907 vcpu->run->internal.ndata = 2;
3908 vcpu->run->internal.data[0] = vect_info;
3909 vcpu->run->internal.data[1] = intr_info;
3910 return 0;
3911 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003912
Jan Kiszkae4a41882008-09-26 09:30:46 +02003913 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
Avi Kivity1b6269d2007-10-09 12:12:19 +02003914 return 1; /* already handled by vmx_vcpu_run() */
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003915
3916 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03003917 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003918 return 1;
3919 }
3920
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003921 if (is_invalid_opcode(intr_info)) {
Andre Przywara51d8b662010-12-21 11:12:02 +01003922 er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003923 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02003924 kvm_queue_exception(vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003925 return 1;
3926 }
3927
Avi Kivity6aa8b732006-12-10 02:21:36 -08003928 error_code = 0;
Ryan Harper2e113842008-02-11 10:26:38 -06003929 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003930 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
3931 if (is_page_fault(intr_info)) {
Sheng Yang14394422008-04-28 12:24:45 +08003932 /* EPT won't cause page fault directly */
Avi Kivity089d0342009-03-23 18:26:32 +02003933 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08003934 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -08003935 cr2 = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003936 trace_kvm_page_fault(cr2, error_code);
3937
Gleb Natapov3298b752009-05-11 13:35:46 +03003938 if (kvm_event_needs_reinjection(vcpu))
Avi Kivity577bdc42008-07-19 08:57:05 +03003939 kvm_mmu_unprotect_page_virt(vcpu, cr2);
Andre Przywaradc25e892010-12-21 11:12:07 +01003940 return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003941 }
3942
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003943 if (vmx->rmode.vm86_active &&
Avi Kivity6aa8b732006-12-10 02:21:36 -08003944 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003945 error_code)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003946 if (vcpu->arch.halt_request) {
3947 vcpu->arch.halt_request = 0;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003948 return kvm_emulate_halt(vcpu);
3949 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003950 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003951 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003952
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003953 ex_no = intr_info & INTR_INFO_VECTOR_MASK;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003954 switch (ex_no) {
3955 case DB_VECTOR:
3956 dr6 = vmcs_readl(EXIT_QUALIFICATION);
3957 if (!(vcpu->guest_debug &
3958 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
3959 vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
3960 kvm_queue_exception(vcpu, DB_VECTOR);
3961 return 1;
3962 }
3963 kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
3964 kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
3965 /* fall through */
3966 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01003967 /*
3968 * Update instruction length as we may reinject #BP from
3969 * user space while in guest debugging mode. Reading it for
3970 * #DB as well causes no harm, it is not used in that case.
3971 */
3972 vmx->vcpu.arch.event_exit_inst_len =
3973 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003974 kvm_run->exit_reason = KVM_EXIT_DEBUG;
Avi Kivity0a434bb2011-04-28 15:59:33 +03003975 rip = kvm_rip_read(vcpu);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003976 kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
3977 kvm_run->debug.arch.exception = ex_no;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003978 break;
3979 default:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003980 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
3981 kvm_run->ex.exception = ex_no;
3982 kvm_run->ex.error_code = error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003983 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003984 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003985 return 0;
3986}
3987
Avi Kivity851ba692009-08-24 11:10:17 +03003988static int handle_external_interrupt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003989{
Avi Kivity1165f5f2007-04-19 17:27:43 +03003990 ++vcpu->stat.irq_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003991 return 1;
3992}
3993
Avi Kivity851ba692009-08-24 11:10:17 +03003994static int handle_triple_fault(struct kvm_vcpu *vcpu)
Avi Kivity988ad742007-02-12 00:54:36 -08003995{
Avi Kivity851ba692009-08-24 11:10:17 +03003996 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Avi Kivity988ad742007-02-12 00:54:36 -08003997 return 0;
3998}
Avi Kivity6aa8b732006-12-10 02:21:36 -08003999
Avi Kivity851ba692009-08-24 11:10:17 +03004000static int handle_io(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004001{
He, Qingbfdaab02007-09-12 14:18:28 +08004002 unsigned long exit_qualification;
Jan Kiszka34c33d12009-02-08 13:28:15 +01004003 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02004004 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004005
He, Qingbfdaab02007-09-12 14:18:28 +08004006 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02004007 string = (exit_qualification & 16) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03004008 in = (exit_qualification & 8) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03004009
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004010 ++vcpu->stat.io_exits;
4011
4012 if (string || in)
Andre Przywara51d8b662010-12-21 11:12:02 +01004013 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004014
4015 port = exit_qualification >> 16;
4016 size = (exit_qualification & 7) + 1;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01004017 skip_emulated_instruction(vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004018
4019 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004020}
4021
Ingo Molnar102d8322007-02-19 14:37:47 +02004022static void
4023vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
4024{
4025 /*
4026 * Patch in the VMCALL instruction:
4027 */
4028 hypercall[0] = 0x0f;
4029 hypercall[1] = 0x01;
4030 hypercall[2] = 0xc1;
Ingo Molnar102d8322007-02-19 14:37:47 +02004031}
4032
Avi Kivity851ba692009-08-24 11:10:17 +03004033static int handle_cr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004034{
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004035 unsigned long exit_qualification, val;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004036 int cr;
4037 int reg;
Avi Kivity49a9b072010-06-10 17:02:14 +03004038 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004039
He, Qingbfdaab02007-09-12 14:18:28 +08004040 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004041 cr = exit_qualification & 15;
4042 reg = (exit_qualification >> 8) & 15;
4043 switch ((exit_qualification >> 4) & 3) {
4044 case 0: /* mov to cr */
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004045 val = kvm_register_read(vcpu, reg);
4046 trace_kvm_cr_write(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004047 switch (cr) {
4048 case 0:
Avi Kivity49a9b072010-06-10 17:02:14 +03004049 err = kvm_set_cr0(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01004050 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004051 return 1;
4052 case 3:
Avi Kivity23902182010-06-10 17:02:16 +03004053 err = kvm_set_cr3(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01004054 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004055 return 1;
4056 case 4:
Avi Kivitya83b29c2010-06-10 17:02:15 +03004057 err = kvm_set_cr4(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01004058 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004059 return 1;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03004060 case 8: {
4061 u8 cr8_prev = kvm_get_cr8(vcpu);
4062 u8 cr8 = kvm_register_read(vcpu, reg);
Andre Przywaraeea1cff2010-12-21 11:12:00 +01004063 err = kvm_set_cr8(vcpu, cr8);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01004064 kvm_complete_insn_gp(vcpu, err);
Gleb Natapov0a5fff192009-04-21 17:45:06 +03004065 if (irqchip_in_kernel(vcpu->kvm))
4066 return 1;
4067 if (cr8_prev <= cr8)
4068 return 1;
Avi Kivity851ba692009-08-24 11:10:17 +03004069 vcpu->run->exit_reason = KVM_EXIT_SET_TPR;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03004070 return 0;
4071 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08004072 };
4073 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03004074 case 2: /* clts */
Avi Kivityedcafe32009-12-30 18:07:40 +02004075 vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
Avi Kivity4d4ec082009-12-29 18:07:30 +02004076 trace_kvm_cr_write(0, kvm_read_cr0(vcpu));
Anthony Liguori25c4c272007-04-27 09:29:21 +03004077 skip_emulated_instruction(vcpu);
Avi Kivity6b52d182010-01-21 15:31:47 +02004078 vmx_fpu_activate(vcpu);
Anthony Liguori25c4c272007-04-27 09:29:21 +03004079 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004080 case 1: /*mov from cr*/
4081 switch (cr) {
4082 case 3:
Avi Kivity9f8fe502010-12-05 17:30:00 +02004083 val = kvm_read_cr3(vcpu);
4084 kvm_register_write(vcpu, reg, val);
4085 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004086 skip_emulated_instruction(vcpu);
4087 return 1;
4088 case 8:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004089 val = kvm_get_cr8(vcpu);
4090 kvm_register_write(vcpu, reg, val);
4091 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004092 skip_emulated_instruction(vcpu);
4093 return 1;
4094 }
4095 break;
4096 case 3: /* lmsw */
Avi Kivitya1f83a72009-12-29 17:33:58 +02004097 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
Avi Kivity4d4ec082009-12-29 18:07:30 +02004098 trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val);
Avi Kivitya1f83a72009-12-29 17:33:58 +02004099 kvm_lmsw(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004100
4101 skip_emulated_instruction(vcpu);
4102 return 1;
4103 default:
4104 break;
4105 }
Avi Kivity851ba692009-08-24 11:10:17 +03004106 vcpu->run->exit_reason = 0;
Rusty Russellf0242472007-08-01 10:48:02 +10004107 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -08004108 (int)(exit_qualification >> 4) & 3, cr);
4109 return 0;
4110}
4111
Avi Kivity851ba692009-08-24 11:10:17 +03004112static int handle_dr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004113{
He, Qingbfdaab02007-09-12 14:18:28 +08004114 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004115 int dr, reg;
4116
Jan Kiszkaf2483412010-01-20 18:20:20 +01004117 /* Do not handle if the CPL > 0, will trigger GP on re-entry */
Avi Kivity0a79b002009-09-01 12:03:25 +03004118 if (!kvm_require_cpl(vcpu, 0))
4119 return 1;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01004120 dr = vmcs_readl(GUEST_DR7);
4121 if (dr & DR7_GD) {
4122 /*
4123 * As the vm-exit takes precedence over the debug trap, we
4124 * need to emulate the latter, either for the host or the
4125 * guest debugging itself.
4126 */
4127 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Avi Kivity851ba692009-08-24 11:10:17 +03004128 vcpu->run->debug.arch.dr6 = vcpu->arch.dr6;
4129 vcpu->run->debug.arch.dr7 = dr;
4130 vcpu->run->debug.arch.pc =
Jan Kiszka42dbaa52008-12-15 13:52:10 +01004131 vmcs_readl(GUEST_CS_BASE) +
4132 vmcs_readl(GUEST_RIP);
Avi Kivity851ba692009-08-24 11:10:17 +03004133 vcpu->run->debug.arch.exception = DB_VECTOR;
4134 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01004135 return 0;
4136 } else {
4137 vcpu->arch.dr7 &= ~DR7_GD;
4138 vcpu->arch.dr6 |= DR6_BD;
4139 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
4140 kvm_queue_exception(vcpu, DB_VECTOR);
4141 return 1;
4142 }
4143 }
4144
He, Qingbfdaab02007-09-12 14:18:28 +08004145 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01004146 dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
4147 reg = DEBUG_REG_ACCESS_REG(exit_qualification);
4148 if (exit_qualification & TYPE_MOV_FROM_DR) {
Gleb Natapov020df072010-04-13 10:05:23 +03004149 unsigned long val;
4150 if (!kvm_get_dr(vcpu, dr, &val))
4151 kvm_register_write(vcpu, reg, val);
4152 } else
4153 kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004154 skip_emulated_instruction(vcpu);
4155 return 1;
4156}
4157
Gleb Natapov020df072010-04-13 10:05:23 +03004158static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
4159{
4160 vmcs_writel(GUEST_DR7, val);
4161}
4162
Avi Kivity851ba692009-08-24 11:10:17 +03004163static int handle_cpuid(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004164{
Avi Kivity06465c52007-02-28 20:46:53 +02004165 kvm_emulate_cpuid(vcpu);
4166 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004167}
4168
Avi Kivity851ba692009-08-24 11:10:17 +03004169static int handle_rdmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004170{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004171 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08004172 u64 data;
4173
4174 if (vmx_get_msr(vcpu, ecx, &data)) {
Avi Kivity59200272010-01-25 19:47:02 +02004175 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02004176 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004177 return 1;
4178 }
4179
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004180 trace_kvm_msr_read(ecx, data);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04004181
Avi Kivity6aa8b732006-12-10 02:21:36 -08004182 /* FIXME: handling of bits 32:63 of rax, rdx */
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004183 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
4184 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004185 skip_emulated_instruction(vcpu);
4186 return 1;
4187}
4188
Avi Kivity851ba692009-08-24 11:10:17 +03004189static int handle_wrmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004190{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004191 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
4192 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
4193 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004194
4195 if (vmx_set_msr(vcpu, ecx, data) != 0) {
Avi Kivity59200272010-01-25 19:47:02 +02004196 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02004197 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004198 return 1;
4199 }
4200
Avi Kivity59200272010-01-25 19:47:02 +02004201 trace_kvm_msr_write(ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004202 skip_emulated_instruction(vcpu);
4203 return 1;
4204}
4205
Avi Kivity851ba692009-08-24 11:10:17 +03004206static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08004207{
Avi Kivity3842d132010-07-27 12:30:24 +03004208 kvm_make_request(KVM_REQ_EVENT, vcpu);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08004209 return 1;
4210}
4211
Avi Kivity851ba692009-08-24 11:10:17 +03004212static int handle_interrupt_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004213{
Eddie Dong85f455f2007-07-06 12:20:49 +03004214 u32 cpu_based_vm_exec_control;
4215
4216 /* clear pending irq */
4217 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
4218 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
4219 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04004220
Avi Kivity3842d132010-07-27 12:30:24 +03004221 kvm_make_request(KVM_REQ_EVENT, vcpu);
4222
Jan Kiszkaa26bf122008-09-26 09:30:45 +02004223 ++vcpu->stat.irq_window_exits;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04004224
Dor Laorc1150d82007-01-05 16:36:24 -08004225 /*
4226 * If the user space waits to inject interrupts, exit as soon as
4227 * possible
4228 */
Gleb Natapov80618232009-04-21 17:44:56 +03004229 if (!irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03004230 vcpu->run->request_interrupt_window &&
Gleb Natapov80618232009-04-21 17:44:56 +03004231 !kvm_cpu_has_interrupt(vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03004232 vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Dor Laorc1150d82007-01-05 16:36:24 -08004233 return 0;
4234 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08004235 return 1;
4236}
4237
Avi Kivity851ba692009-08-24 11:10:17 +03004238static int handle_halt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004239{
4240 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03004241 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004242}
4243
Avi Kivity851ba692009-08-24 11:10:17 +03004244static int handle_vmcall(struct kvm_vcpu *vcpu)
Ingo Molnarc21415e2007-02-19 14:37:47 +02004245{
Dor Laor510043d2007-02-19 18:25:43 +02004246 skip_emulated_instruction(vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05004247 kvm_emulate_hypercall(vcpu);
4248 return 1;
Ingo Molnarc21415e2007-02-19 14:37:47 +02004249}
4250
Avi Kivity851ba692009-08-24 11:10:17 +03004251static int handle_vmx_insn(struct kvm_vcpu *vcpu)
Avi Kivitye3c7cb62009-06-16 14:19:52 +03004252{
4253 kvm_queue_exception(vcpu, UD_VECTOR);
4254 return 1;
4255}
4256
Gleb Natapovec25d5e2010-11-01 15:35:01 +02004257static int handle_invd(struct kvm_vcpu *vcpu)
4258{
Andre Przywara51d8b662010-12-21 11:12:02 +01004259 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovec25d5e2010-11-01 15:35:01 +02004260}
4261
Avi Kivity851ba692009-08-24 11:10:17 +03004262static int handle_invlpg(struct kvm_vcpu *vcpu)
Marcelo Tosattia7052892008-09-23 13:18:35 -03004263{
Sheng Yangf9c617f2009-03-25 10:08:52 +08004264 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosattia7052892008-09-23 13:18:35 -03004265
4266 kvm_mmu_invlpg(vcpu, exit_qualification);
4267 skip_emulated_instruction(vcpu);
4268 return 1;
4269}
4270
Avi Kivity851ba692009-08-24 11:10:17 +03004271static int handle_wbinvd(struct kvm_vcpu *vcpu)
Eddie Donge5edaa02007-11-11 12:28:35 +02004272{
4273 skip_emulated_instruction(vcpu);
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004274 kvm_emulate_wbinvd(vcpu);
Eddie Donge5edaa02007-11-11 12:28:35 +02004275 return 1;
4276}
4277
Dexuan Cui2acf9232010-06-10 11:27:12 +08004278static int handle_xsetbv(struct kvm_vcpu *vcpu)
4279{
4280 u64 new_bv = kvm_read_edx_eax(vcpu);
4281 u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
4282
4283 if (kvm_set_xcr(vcpu, index, new_bv) == 0)
4284 skip_emulated_instruction(vcpu);
4285 return 1;
4286}
4287
Avi Kivity851ba692009-08-24 11:10:17 +03004288static int handle_apic_access(struct kvm_vcpu *vcpu)
Sheng Yangf78e0e22007-10-29 09:40:42 +08004289{
Andre Przywara51d8b662010-12-21 11:12:02 +01004290 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Sheng Yangf78e0e22007-10-29 09:40:42 +08004291}
4292
Avi Kivity851ba692009-08-24 11:10:17 +03004293static int handle_task_switch(struct kvm_vcpu *vcpu)
Izik Eidus37817f22008-03-24 23:14:53 +02004294{
Jan Kiszka60637aa2008-09-26 09:30:47 +02004295 struct vcpu_vmx *vmx = to_vmx(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02004296 unsigned long exit_qualification;
Jan Kiszkae269fb22010-04-14 15:51:09 +02004297 bool has_error_code = false;
4298 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02004299 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03004300 int reason, type, idt_v;
4301
4302 idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
4303 type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
Izik Eidus37817f22008-03-24 23:14:53 +02004304
4305 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4306
4307 reason = (u32)exit_qualification >> 30;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03004308 if (reason == TASK_SWITCH_GATE && idt_v) {
4309 switch (type) {
4310 case INTR_TYPE_NMI_INTR:
4311 vcpu->arch.nmi_injected = false;
Avi Kivity654f06f2011-03-23 15:02:47 +02004312 vmx_set_nmi_mask(vcpu, true);
Gleb Natapov64a7ec02009-03-30 16:03:29 +03004313 break;
4314 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03004315 case INTR_TYPE_SOFT_INTR:
Gleb Natapov64a7ec02009-03-30 16:03:29 +03004316 kvm_clear_interrupt_queue(vcpu);
4317 break;
4318 case INTR_TYPE_HARD_EXCEPTION:
Jan Kiszkae269fb22010-04-14 15:51:09 +02004319 if (vmx->idt_vectoring_info &
4320 VECTORING_INFO_DELIVER_CODE_MASK) {
4321 has_error_code = true;
4322 error_code =
4323 vmcs_read32(IDT_VECTORING_ERROR_CODE);
4324 }
4325 /* fall through */
Gleb Natapov64a7ec02009-03-30 16:03:29 +03004326 case INTR_TYPE_SOFT_EXCEPTION:
4327 kvm_clear_exception_queue(vcpu);
4328 break;
4329 default:
4330 break;
4331 }
Jan Kiszka60637aa2008-09-26 09:30:47 +02004332 }
Izik Eidus37817f22008-03-24 23:14:53 +02004333 tss_selector = exit_qualification;
4334
Gleb Natapov64a7ec02009-03-30 16:03:29 +03004335 if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION &&
4336 type != INTR_TYPE_EXT_INTR &&
4337 type != INTR_TYPE_NMI_INTR))
4338 skip_emulated_instruction(vcpu);
4339
Gleb Natapovacb54512010-04-15 21:03:50 +03004340 if (kvm_task_switch(vcpu, tss_selector, reason,
4341 has_error_code, error_code) == EMULATE_FAIL) {
4342 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4343 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
4344 vcpu->run->internal.ndata = 0;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01004345 return 0;
Gleb Natapovacb54512010-04-15 21:03:50 +03004346 }
Jan Kiszka42dbaa52008-12-15 13:52:10 +01004347
4348 /* clear all local breakpoint enable flags */
4349 vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
4350
4351 /*
4352 * TODO: What about debug traps on tss switch?
4353 * Are we supposed to inject them and update dr6?
4354 */
4355
4356 return 1;
Izik Eidus37817f22008-03-24 23:14:53 +02004357}
4358
Avi Kivity851ba692009-08-24 11:10:17 +03004359static int handle_ept_violation(struct kvm_vcpu *vcpu)
Sheng Yang14394422008-04-28 12:24:45 +08004360{
Sheng Yangf9c617f2009-03-25 10:08:52 +08004361 unsigned long exit_qualification;
Sheng Yang14394422008-04-28 12:24:45 +08004362 gpa_t gpa;
Sheng Yang14394422008-04-28 12:24:45 +08004363 int gla_validity;
Sheng Yang14394422008-04-28 12:24:45 +08004364
Sheng Yangf9c617f2009-03-25 10:08:52 +08004365 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Sheng Yang14394422008-04-28 12:24:45 +08004366
4367 if (exit_qualification & (1 << 6)) {
4368 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
Jan Kiszka7f582ab2009-07-22 23:53:01 +02004369 return -EINVAL;
Sheng Yang14394422008-04-28 12:24:45 +08004370 }
4371
4372 gla_validity = (exit_qualification >> 7) & 0x3;
4373 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
4374 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
4375 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
4376 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
Sheng Yangf9c617f2009-03-25 10:08:52 +08004377 vmcs_readl(GUEST_LINEAR_ADDRESS));
Sheng Yang14394422008-04-28 12:24:45 +08004378 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
4379 (long unsigned int)exit_qualification);
Avi Kivity851ba692009-08-24 11:10:17 +03004380 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
4381 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION;
Avi Kivity596ae892009-06-03 14:12:10 +03004382 return 0;
Sheng Yang14394422008-04-28 12:24:45 +08004383 }
4384
4385 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004386 trace_kvm_page_fault(gpa, exit_qualification);
Andre Przywaradc25e892010-12-21 11:12:07 +01004387 return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0);
Sheng Yang14394422008-04-28 12:24:45 +08004388}
4389
Marcelo Tosatti68f89402009-06-11 12:07:43 -03004390static u64 ept_rsvd_mask(u64 spte, int level)
4391{
4392 int i;
4393 u64 mask = 0;
4394
4395 for (i = 51; i > boot_cpu_data.x86_phys_bits; i--)
4396 mask |= (1ULL << i);
4397
4398 if (level > 2)
4399 /* bits 7:3 reserved */
4400 mask |= 0xf8;
4401 else if (level == 2) {
4402 if (spte & (1ULL << 7))
4403 /* 2MB ref, bits 20:12 reserved */
4404 mask |= 0x1ff000;
4405 else
4406 /* bits 6:3 reserved */
4407 mask |= 0x78;
4408 }
4409
4410 return mask;
4411}
4412
4413static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte,
4414 int level)
4415{
4416 printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level);
4417
4418 /* 010b (write-only) */
4419 WARN_ON((spte & 0x7) == 0x2);
4420
4421 /* 110b (write/execute) */
4422 WARN_ON((spte & 0x7) == 0x6);
4423
4424 /* 100b (execute-only) and value not supported by logical processor */
4425 if (!cpu_has_vmx_ept_execute_only())
4426 WARN_ON((spte & 0x7) == 0x4);
4427
4428 /* not 000b */
4429 if ((spte & 0x7)) {
4430 u64 rsvd_bits = spte & ept_rsvd_mask(spte, level);
4431
4432 if (rsvd_bits != 0) {
4433 printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n",
4434 __func__, rsvd_bits);
4435 WARN_ON(1);
4436 }
4437
4438 if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) {
4439 u64 ept_mem_type = (spte & 0x38) >> 3;
4440
4441 if (ept_mem_type == 2 || ept_mem_type == 3 ||
4442 ept_mem_type == 7) {
4443 printk(KERN_ERR "%s: ept_mem_type=0x%llx\n",
4444 __func__, ept_mem_type);
4445 WARN_ON(1);
4446 }
4447 }
4448 }
4449}
4450
Avi Kivity851ba692009-08-24 11:10:17 +03004451static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
Marcelo Tosatti68f89402009-06-11 12:07:43 -03004452{
4453 u64 sptes[4];
4454 int nr_sptes, i;
4455 gpa_t gpa;
4456
4457 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
4458
4459 printk(KERN_ERR "EPT: Misconfiguration.\n");
4460 printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa);
4461
4462 nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes);
4463
4464 for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i)
4465 ept_misconfig_inspect_spte(vcpu, sptes[i-1], i);
4466
Avi Kivity851ba692009-08-24 11:10:17 +03004467 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
4468 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
Marcelo Tosatti68f89402009-06-11 12:07:43 -03004469
4470 return 0;
4471}
4472
Avi Kivity851ba692009-08-24 11:10:17 +03004473static int handle_nmi_window(struct kvm_vcpu *vcpu)
Sheng Yangf08864b2008-05-15 18:23:25 +08004474{
4475 u32 cpu_based_vm_exec_control;
4476
4477 /* clear pending NMI */
4478 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
4479 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
4480 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
4481 ++vcpu->stat.nmi_window_exits;
Avi Kivity3842d132010-07-27 12:30:24 +03004482 kvm_make_request(KVM_REQ_EVENT, vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08004483
4484 return 1;
4485}
4486
Mohammed Gamal80ced182009-09-01 12:48:18 +02004487static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
Mohammed Gamalea953ef2008-08-17 16:47:05 +03004488{
Avi Kivity8b3079a2009-01-05 12:10:54 +02004489 struct vcpu_vmx *vmx = to_vmx(vcpu);
4490 enum emulation_result err = EMULATE_DONE;
Mohammed Gamal80ced182009-09-01 12:48:18 +02004491 int ret = 1;
Avi Kivity49e9d552010-09-19 14:34:08 +02004492 u32 cpu_exec_ctrl;
4493 bool intr_window_requested;
4494
4495 cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
4496 intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03004497
4498 while (!guest_state_valid(vcpu)) {
Avi Kivity49e9d552010-09-19 14:34:08 +02004499 if (intr_window_requested
4500 && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF))
4501 return handle_interrupt_window(&vmx->vcpu);
4502
Andre Przywara51d8b662010-12-21 11:12:02 +01004503 err = emulate_instruction(vcpu, 0);
Mohammed Gamalea953ef2008-08-17 16:47:05 +03004504
Mohammed Gamal80ced182009-09-01 12:48:18 +02004505 if (err == EMULATE_DO_MMIO) {
4506 ret = 0;
4507 goto out;
4508 }
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01004509
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004510 if (err != EMULATE_DONE)
4511 return 0;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03004512
4513 if (signal_pending(current))
Mohammed Gamal80ced182009-09-01 12:48:18 +02004514 goto out;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03004515 if (need_resched())
4516 schedule();
4517 }
4518
Mohammed Gamal80ced182009-09-01 12:48:18 +02004519 vmx->emulation_required = 0;
4520out:
4521 return ret;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03004522}
4523
Avi Kivity6aa8b732006-12-10 02:21:36 -08004524/*
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08004525 * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE
4526 * exiting, so only get here on cpu with PAUSE-Loop-Exiting.
4527 */
Marcelo Tosatti9fb41ba2009-10-12 19:37:31 -03004528static int handle_pause(struct kvm_vcpu *vcpu)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08004529{
4530 skip_emulated_instruction(vcpu);
4531 kvm_vcpu_on_spin(vcpu);
4532
4533 return 1;
4534}
4535
Sheng Yang59708672009-12-15 13:29:54 +08004536static int handle_invalid_op(struct kvm_vcpu *vcpu)
4537{
4538 kvm_queue_exception(vcpu, UD_VECTOR);
4539 return 1;
4540}
4541
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08004542/*
Nadav Har'Elff2f6fe2011-05-25 23:05:27 +03004543 * To run an L2 guest, we need a vmcs02 based on the L1-specified vmcs12.
4544 * We could reuse a single VMCS for all the L2 guests, but we also want the
4545 * option to allocate a separate vmcs02 for each separate loaded vmcs12 - this
4546 * allows keeping them loaded on the processor, and in the future will allow
4547 * optimizations where prepare_vmcs02 doesn't need to set all the fields on
4548 * every entry if they never change.
4549 * So we keep, in vmx->nested.vmcs02_pool, a cache of size VMCS02_POOL_SIZE
4550 * (>=0) with a vmcs02 for each recently loaded vmcs12s, most recent first.
4551 *
4552 * The following functions allocate and free a vmcs02 in this pool.
4553 */
4554
4555/* Get a VMCS from the pool to use as vmcs02 for the current vmcs12. */
4556static struct loaded_vmcs *nested_get_current_vmcs02(struct vcpu_vmx *vmx)
4557{
4558 struct vmcs02_list *item;
4559 list_for_each_entry(item, &vmx->nested.vmcs02_pool, list)
4560 if (item->vmptr == vmx->nested.current_vmptr) {
4561 list_move(&item->list, &vmx->nested.vmcs02_pool);
4562 return &item->vmcs02;
4563 }
4564
4565 if (vmx->nested.vmcs02_num >= max(VMCS02_POOL_SIZE, 1)) {
4566 /* Recycle the least recently used VMCS. */
4567 item = list_entry(vmx->nested.vmcs02_pool.prev,
4568 struct vmcs02_list, list);
4569 item->vmptr = vmx->nested.current_vmptr;
4570 list_move(&item->list, &vmx->nested.vmcs02_pool);
4571 return &item->vmcs02;
4572 }
4573
4574 /* Create a new VMCS */
4575 item = (struct vmcs02_list *)
4576 kmalloc(sizeof(struct vmcs02_list), GFP_KERNEL);
4577 if (!item)
4578 return NULL;
4579 item->vmcs02.vmcs = alloc_vmcs();
4580 if (!item->vmcs02.vmcs) {
4581 kfree(item);
4582 return NULL;
4583 }
4584 loaded_vmcs_init(&item->vmcs02);
4585 item->vmptr = vmx->nested.current_vmptr;
4586 list_add(&(item->list), &(vmx->nested.vmcs02_pool));
4587 vmx->nested.vmcs02_num++;
4588 return &item->vmcs02;
4589}
4590
4591/* Free and remove from pool a vmcs02 saved for a vmcs12 (if there is one) */
4592static void nested_free_vmcs02(struct vcpu_vmx *vmx, gpa_t vmptr)
4593{
4594 struct vmcs02_list *item;
4595 list_for_each_entry(item, &vmx->nested.vmcs02_pool, list)
4596 if (item->vmptr == vmptr) {
4597 free_loaded_vmcs(&item->vmcs02);
4598 list_del(&item->list);
4599 kfree(item);
4600 vmx->nested.vmcs02_num--;
4601 return;
4602 }
4603}
4604
4605/*
4606 * Free all VMCSs saved for this vcpu, except the one pointed by
4607 * vmx->loaded_vmcs. These include the VMCSs in vmcs02_pool (except the one
4608 * currently used, if running L2), and vmcs01 when running L2.
4609 */
4610static void nested_free_all_saved_vmcss(struct vcpu_vmx *vmx)
4611{
4612 struct vmcs02_list *item, *n;
4613 list_for_each_entry_safe(item, n, &vmx->nested.vmcs02_pool, list) {
4614 if (vmx->loaded_vmcs != &item->vmcs02)
4615 free_loaded_vmcs(&item->vmcs02);
4616 list_del(&item->list);
4617 kfree(item);
4618 }
4619 vmx->nested.vmcs02_num = 0;
4620
4621 if (vmx->loaded_vmcs != &vmx->vmcs01)
4622 free_loaded_vmcs(&vmx->vmcs01);
4623}
4624
4625/*
Nadav Har'Elec378ae2011-05-25 23:02:54 +03004626 * Emulate the VMXON instruction.
4627 * Currently, we just remember that VMX is active, and do not save or even
4628 * inspect the argument to VMXON (the so-called "VMXON pointer") because we
4629 * do not currently need to store anything in that guest-allocated memory
4630 * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their
4631 * argument is different from the VMXON pointer (which the spec says they do).
4632 */
4633static int handle_vmon(struct kvm_vcpu *vcpu)
4634{
4635 struct kvm_segment cs;
4636 struct vcpu_vmx *vmx = to_vmx(vcpu);
4637
4638 /* The Intel VMX Instruction Reference lists a bunch of bits that
4639 * are prerequisite to running VMXON, most notably cr4.VMXE must be
4640 * set to 1 (see vmx_set_cr4() for when we allow the guest to set this).
4641 * Otherwise, we should fail with #UD. We test these now:
4642 */
4643 if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE) ||
4644 !kvm_read_cr0_bits(vcpu, X86_CR0_PE) ||
4645 (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) {
4646 kvm_queue_exception(vcpu, UD_VECTOR);
4647 return 1;
4648 }
4649
4650 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
4651 if (is_long_mode(vcpu) && !cs.l) {
4652 kvm_queue_exception(vcpu, UD_VECTOR);
4653 return 1;
4654 }
4655
4656 if (vmx_get_cpl(vcpu)) {
4657 kvm_inject_gp(vcpu, 0);
4658 return 1;
4659 }
4660
Nadav Har'Elff2f6fe2011-05-25 23:05:27 +03004661 INIT_LIST_HEAD(&(vmx->nested.vmcs02_pool));
4662 vmx->nested.vmcs02_num = 0;
4663
Nadav Har'Elec378ae2011-05-25 23:02:54 +03004664 vmx->nested.vmxon = true;
4665
4666 skip_emulated_instruction(vcpu);
4667 return 1;
4668}
4669
4670/*
4671 * Intel's VMX Instruction Reference specifies a common set of prerequisites
4672 * for running VMX instructions (except VMXON, whose prerequisites are
4673 * slightly different). It also specifies what exception to inject otherwise.
4674 */
4675static int nested_vmx_check_permission(struct kvm_vcpu *vcpu)
4676{
4677 struct kvm_segment cs;
4678 struct vcpu_vmx *vmx = to_vmx(vcpu);
4679
4680 if (!vmx->nested.vmxon) {
4681 kvm_queue_exception(vcpu, UD_VECTOR);
4682 return 0;
4683 }
4684
4685 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
4686 if ((vmx_get_rflags(vcpu) & X86_EFLAGS_VM) ||
4687 (is_long_mode(vcpu) && !cs.l)) {
4688 kvm_queue_exception(vcpu, UD_VECTOR);
4689 return 0;
4690 }
4691
4692 if (vmx_get_cpl(vcpu)) {
4693 kvm_inject_gp(vcpu, 0);
4694 return 0;
4695 }
4696
4697 return 1;
4698}
4699
4700/*
4701 * Free whatever needs to be freed from vmx->nested when L1 goes down, or
4702 * just stops using VMX.
4703 */
4704static void free_nested(struct vcpu_vmx *vmx)
4705{
4706 if (!vmx->nested.vmxon)
4707 return;
4708 vmx->nested.vmxon = false;
Nadav Har'Ela9d30f32011-05-25 23:03:55 +03004709 if (vmx->nested.current_vmptr != -1ull) {
4710 kunmap(vmx->nested.current_vmcs12_page);
4711 nested_release_page(vmx->nested.current_vmcs12_page);
4712 vmx->nested.current_vmptr = -1ull;
4713 vmx->nested.current_vmcs12 = NULL;
4714 }
Nadav Har'Elff2f6fe2011-05-25 23:05:27 +03004715
4716 nested_free_all_saved_vmcss(vmx);
Nadav Har'Elec378ae2011-05-25 23:02:54 +03004717}
4718
4719/* Emulate the VMXOFF instruction */
4720static int handle_vmoff(struct kvm_vcpu *vcpu)
4721{
4722 if (!nested_vmx_check_permission(vcpu))
4723 return 1;
4724 free_nested(to_vmx(vcpu));
4725 skip_emulated_instruction(vcpu);
4726 return 1;
4727}
4728
4729/*
Nadav Har'El064aea72011-05-25 23:04:56 +03004730 * Decode the memory-address operand of a vmx instruction, as recorded on an
4731 * exit caused by such an instruction (run by a guest hypervisor).
4732 * On success, returns 0. When the operand is invalid, returns 1 and throws
4733 * #UD or #GP.
4734 */
4735static int get_vmx_mem_address(struct kvm_vcpu *vcpu,
4736 unsigned long exit_qualification,
4737 u32 vmx_instruction_info, gva_t *ret)
4738{
4739 /*
4740 * According to Vol. 3B, "Information for VM Exits Due to Instruction
4741 * Execution", on an exit, vmx_instruction_info holds most of the
4742 * addressing components of the operand. Only the displacement part
4743 * is put in exit_qualification (see 3B, "Basic VM-Exit Information").
4744 * For how an actual address is calculated from all these components,
4745 * refer to Vol. 1, "Operand Addressing".
4746 */
4747 int scaling = vmx_instruction_info & 3;
4748 int addr_size = (vmx_instruction_info >> 7) & 7;
4749 bool is_reg = vmx_instruction_info & (1u << 10);
4750 int seg_reg = (vmx_instruction_info >> 15) & 7;
4751 int index_reg = (vmx_instruction_info >> 18) & 0xf;
4752 bool index_is_valid = !(vmx_instruction_info & (1u << 22));
4753 int base_reg = (vmx_instruction_info >> 23) & 0xf;
4754 bool base_is_valid = !(vmx_instruction_info & (1u << 27));
4755
4756 if (is_reg) {
4757 kvm_queue_exception(vcpu, UD_VECTOR);
4758 return 1;
4759 }
4760
4761 /* Addr = segment_base + offset */
4762 /* offset = base + [index * scale] + displacement */
4763 *ret = vmx_get_segment_base(vcpu, seg_reg);
4764 if (base_is_valid)
4765 *ret += kvm_register_read(vcpu, base_reg);
4766 if (index_is_valid)
4767 *ret += kvm_register_read(vcpu, index_reg)<<scaling;
4768 *ret += exit_qualification; /* holds the displacement */
4769
4770 if (addr_size == 1) /* 32 bit */
4771 *ret &= 0xffffffff;
4772
4773 /*
4774 * TODO: throw #GP (and return 1) in various cases that the VM*
4775 * instructions require it - e.g., offset beyond segment limit,
4776 * unusable or unreadable/unwritable segment, non-canonical 64-bit
4777 * address, and so on. Currently these are not checked.
4778 */
4779 return 0;
4780}
4781
4782/*
Nadav Har'El0140cae2011-05-25 23:06:28 +03004783 * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(),
4784 * set the success or error code of an emulated VMX instruction, as specified
4785 * by Vol 2B, VMX Instruction Reference, "Conventions".
4786 */
4787static void nested_vmx_succeed(struct kvm_vcpu *vcpu)
4788{
4789 vmx_set_rflags(vcpu, vmx_get_rflags(vcpu)
4790 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
4791 X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF));
4792}
4793
4794static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu)
4795{
4796 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
4797 & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF |
4798 X86_EFLAGS_SF | X86_EFLAGS_OF))
4799 | X86_EFLAGS_CF);
4800}
4801
4802static void nested_vmx_failValid(struct kvm_vcpu *vcpu,
4803 u32 vm_instruction_error)
4804{
4805 if (to_vmx(vcpu)->nested.current_vmptr == -1ull) {
4806 /*
4807 * failValid writes the error number to the current VMCS, which
4808 * can't be done there isn't a current VMCS.
4809 */
4810 nested_vmx_failInvalid(vcpu);
4811 return;
4812 }
4813 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
4814 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
4815 X86_EFLAGS_SF | X86_EFLAGS_OF))
4816 | X86_EFLAGS_ZF);
4817 get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
4818}
4819
Nadav Har'El27d6c862011-05-25 23:06:59 +03004820/* Emulate the VMCLEAR instruction */
4821static int handle_vmclear(struct kvm_vcpu *vcpu)
4822{
4823 struct vcpu_vmx *vmx = to_vmx(vcpu);
4824 gva_t gva;
4825 gpa_t vmptr;
4826 struct vmcs12 *vmcs12;
4827 struct page *page;
4828 struct x86_exception e;
4829
4830 if (!nested_vmx_check_permission(vcpu))
4831 return 1;
4832
4833 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4834 vmcs_read32(VMX_INSTRUCTION_INFO), &gva))
4835 return 1;
4836
4837 if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr,
4838 sizeof(vmptr), &e)) {
4839 kvm_inject_page_fault(vcpu, &e);
4840 return 1;
4841 }
4842
4843 if (!IS_ALIGNED(vmptr, PAGE_SIZE)) {
4844 nested_vmx_failValid(vcpu, VMXERR_VMCLEAR_INVALID_ADDRESS);
4845 skip_emulated_instruction(vcpu);
4846 return 1;
4847 }
4848
4849 if (vmptr == vmx->nested.current_vmptr) {
4850 kunmap(vmx->nested.current_vmcs12_page);
4851 nested_release_page(vmx->nested.current_vmcs12_page);
4852 vmx->nested.current_vmptr = -1ull;
4853 vmx->nested.current_vmcs12 = NULL;
4854 }
4855
4856 page = nested_get_page(vcpu, vmptr);
4857 if (page == NULL) {
4858 /*
4859 * For accurate processor emulation, VMCLEAR beyond available
4860 * physical memory should do nothing at all. However, it is
4861 * possible that a nested vmx bug, not a guest hypervisor bug,
4862 * resulted in this case, so let's shut down before doing any
4863 * more damage:
4864 */
4865 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
4866 return 1;
4867 }
4868 vmcs12 = kmap(page);
4869 vmcs12->launch_state = 0;
4870 kunmap(page);
4871 nested_release_page(page);
4872
4873 nested_free_vmcs02(vmx, vmptr);
4874
4875 skip_emulated_instruction(vcpu);
4876 nested_vmx_succeed(vcpu);
4877 return 1;
4878}
4879
Nadav Har'El63846662011-05-25 23:07:29 +03004880/* Emulate the VMPTRLD instruction */
4881static int handle_vmptrld(struct kvm_vcpu *vcpu)
4882{
4883 struct vcpu_vmx *vmx = to_vmx(vcpu);
4884 gva_t gva;
4885 gpa_t vmptr;
4886 struct x86_exception e;
4887
4888 if (!nested_vmx_check_permission(vcpu))
4889 return 1;
4890
4891 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
4892 vmcs_read32(VMX_INSTRUCTION_INFO), &gva))
4893 return 1;
4894
4895 if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr,
4896 sizeof(vmptr), &e)) {
4897 kvm_inject_page_fault(vcpu, &e);
4898 return 1;
4899 }
4900
4901 if (!IS_ALIGNED(vmptr, PAGE_SIZE)) {
4902 nested_vmx_failValid(vcpu, VMXERR_VMPTRLD_INVALID_ADDRESS);
4903 skip_emulated_instruction(vcpu);
4904 return 1;
4905 }
4906
4907 if (vmx->nested.current_vmptr != vmptr) {
4908 struct vmcs12 *new_vmcs12;
4909 struct page *page;
4910 page = nested_get_page(vcpu, vmptr);
4911 if (page == NULL) {
4912 nested_vmx_failInvalid(vcpu);
4913 skip_emulated_instruction(vcpu);
4914 return 1;
4915 }
4916 new_vmcs12 = kmap(page);
4917 if (new_vmcs12->revision_id != VMCS12_REVISION) {
4918 kunmap(page);
4919 nested_release_page_clean(page);
4920 nested_vmx_failValid(vcpu,
4921 VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
4922 skip_emulated_instruction(vcpu);
4923 return 1;
4924 }
4925 if (vmx->nested.current_vmptr != -1ull) {
4926 kunmap(vmx->nested.current_vmcs12_page);
4927 nested_release_page(vmx->nested.current_vmcs12_page);
4928 }
4929
4930 vmx->nested.current_vmptr = vmptr;
4931 vmx->nested.current_vmcs12 = new_vmcs12;
4932 vmx->nested.current_vmcs12_page = page;
4933 }
4934
4935 nested_vmx_succeed(vcpu);
4936 skip_emulated_instruction(vcpu);
4937 return 1;
4938}
4939
Nadav Har'El6a4d7552011-05-25 23:08:00 +03004940/* Emulate the VMPTRST instruction */
4941static int handle_vmptrst(struct kvm_vcpu *vcpu)
4942{
4943 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4944 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
4945 gva_t vmcs_gva;
4946 struct x86_exception e;
4947
4948 if (!nested_vmx_check_permission(vcpu))
4949 return 1;
4950
4951 if (get_vmx_mem_address(vcpu, exit_qualification,
4952 vmx_instruction_info, &vmcs_gva))
4953 return 1;
4954 /* ok to use *_system, as nested_vmx_check_permission verified cpl=0 */
4955 if (kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, vmcs_gva,
4956 (void *)&to_vmx(vcpu)->nested.current_vmptr,
4957 sizeof(u64), &e)) {
4958 kvm_inject_page_fault(vcpu, &e);
4959 return 1;
4960 }
4961 nested_vmx_succeed(vcpu);
4962 skip_emulated_instruction(vcpu);
4963 return 1;
4964}
4965
Nadav Har'El0140cae2011-05-25 23:06:28 +03004966/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08004967 * The exit handlers return 1 if the exit was handled fully and guest execution
4968 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
4969 * to be done to userspace and return 0.
4970 */
Avi Kivity851ba692009-08-24 11:10:17 +03004971static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004972 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
4973 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08004974 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Sheng Yangf08864b2008-05-15 18:23:25 +08004975 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004976 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004977 [EXIT_REASON_CR_ACCESS] = handle_cr,
4978 [EXIT_REASON_DR_ACCESS] = handle_dr,
4979 [EXIT_REASON_CPUID] = handle_cpuid,
4980 [EXIT_REASON_MSR_READ] = handle_rdmsr,
4981 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
4982 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
4983 [EXIT_REASON_HLT] = handle_halt,
Gleb Natapovec25d5e2010-11-01 15:35:01 +02004984 [EXIT_REASON_INVD] = handle_invd,
Marcelo Tosattia7052892008-09-23 13:18:35 -03004985 [EXIT_REASON_INVLPG] = handle_invlpg,
Ingo Molnarc21415e2007-02-19 14:37:47 +02004986 [EXIT_REASON_VMCALL] = handle_vmcall,
Nadav Har'El27d6c862011-05-25 23:06:59 +03004987 [EXIT_REASON_VMCLEAR] = handle_vmclear,
Avi Kivitye3c7cb62009-06-16 14:19:52 +03004988 [EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
Nadav Har'El63846662011-05-25 23:07:29 +03004989 [EXIT_REASON_VMPTRLD] = handle_vmptrld,
Nadav Har'El6a4d7552011-05-25 23:08:00 +03004990 [EXIT_REASON_VMPTRST] = handle_vmptrst,
Avi Kivitye3c7cb62009-06-16 14:19:52 +03004991 [EXIT_REASON_VMREAD] = handle_vmx_insn,
4992 [EXIT_REASON_VMRESUME] = handle_vmx_insn,
4993 [EXIT_REASON_VMWRITE] = handle_vmx_insn,
Nadav Har'Elec378ae2011-05-25 23:02:54 +03004994 [EXIT_REASON_VMOFF] = handle_vmoff,
4995 [EXIT_REASON_VMON] = handle_vmon,
Sheng Yangf78e0e22007-10-29 09:40:42 +08004996 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
4997 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
Eddie Donge5edaa02007-11-11 12:28:35 +02004998 [EXIT_REASON_WBINVD] = handle_wbinvd,
Dexuan Cui2acf9232010-06-10 11:27:12 +08004999 [EXIT_REASON_XSETBV] = handle_xsetbv,
Izik Eidus37817f22008-03-24 23:14:53 +02005000 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
Andi Kleena0861c02009-06-08 17:37:09 +08005001 [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check,
Marcelo Tosatti68f89402009-06-11 12:07:43 -03005002 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
5003 [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig,
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08005004 [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause,
Sheng Yang59708672009-12-15 13:29:54 +08005005 [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op,
5006 [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005007};
5008
5009static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04005010 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08005011
Avi Kivity586f9602010-11-18 13:09:54 +02005012static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
5013{
5014 *info1 = vmcs_readl(EXIT_QUALIFICATION);
5015 *info2 = vmcs_read32(VM_EXIT_INTR_INFO);
5016}
5017
Avi Kivity6aa8b732006-12-10 02:21:36 -08005018/*
5019 * The guest has exited. See if we can fix it or if we need userspace
5020 * assistance.
5021 */
Avi Kivity851ba692009-08-24 11:10:17 +03005022static int vmx_handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08005023{
Avi Kivity29bd8a72007-09-10 17:27:03 +03005024 struct vcpu_vmx *vmx = to_vmx(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08005025 u32 exit_reason = vmx->exit_reason;
Avi Kivity1155f762007-11-22 11:30:47 +02005026 u32 vectoring_info = vmx->idt_vectoring_info;
Avi Kivity29bd8a72007-09-10 17:27:03 +03005027
Avi Kivityaa179112010-11-17 18:44:19 +02005028 trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04005029
Mohammed Gamal80ced182009-09-01 12:48:18 +02005030 /* If guest state is invalid, start emulating */
5031 if (vmx->emulation_required && emulate_invalid_guest_state)
5032 return handle_invalid_guest_state(vcpu);
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01005033
Mohammed Gamal51207022010-05-31 22:40:54 +03005034 if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) {
5035 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
5036 vcpu->run->fail_entry.hardware_entry_failure_reason
5037 = exit_reason;
5038 return 0;
5039 }
5040
Avi Kivity29bd8a72007-09-10 17:27:03 +03005041 if (unlikely(vmx->fail)) {
Avi Kivity851ba692009-08-24 11:10:17 +03005042 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
5043 vcpu->run->fail_entry.hardware_entry_failure_reason
Avi Kivity29bd8a72007-09-10 17:27:03 +03005044 = vmcs_read32(VM_INSTRUCTION_ERROR);
5045 return 0;
5046 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08005047
Mike Dayd77c26f2007-10-08 09:02:08 -04005048 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
Sheng Yang14394422008-04-28 12:24:45 +08005049 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
Jan Kiszka60637aa2008-09-26 09:30:47 +02005050 exit_reason != EXIT_REASON_EPT_VIOLATION &&
5051 exit_reason != EXIT_REASON_TASK_SWITCH))
5052 printk(KERN_WARNING "%s: unexpected, valid vectoring info "
5053 "(0x%x) and exit reason is 0x%x\n",
5054 __func__, vectoring_info, exit_reason);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005055
5056 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) {
Gleb Natapovc4282df2009-04-21 17:45:07 +03005057 if (vmx_interrupt_allowed(vcpu)) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005058 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005059 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
Jan Kiszka45312202008-12-11 16:54:54 +01005060 vcpu->arch.nmi_pending) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005061 /*
5062 * This CPU don't support us in finding the end of an
5063 * NMI-blocked window if the guest runs with IRQs
5064 * disabled. So we pull the trigger after 1 s of
5065 * futile waiting, but inform the user about this.
5066 */
5067 printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
5068 "state on VCPU %d after 1 s timeout\n",
5069 __func__, vcpu->vcpu_id);
5070 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005071 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005072 }
5073
Avi Kivity6aa8b732006-12-10 02:21:36 -08005074 if (exit_reason < kvm_vmx_max_exit_handlers
5075 && kvm_vmx_exit_handlers[exit_reason])
Avi Kivity851ba692009-08-24 11:10:17 +03005076 return kvm_vmx_exit_handlers[exit_reason](vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08005077 else {
Avi Kivity851ba692009-08-24 11:10:17 +03005078 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
5079 vcpu->run->hw.hardware_exit_reason = exit_reason;
Avi Kivity6aa8b732006-12-10 02:21:36 -08005080 }
5081 return 0;
5082}
5083
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005084static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08005085{
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005086 if (irr == -1 || tpr < irr) {
Yang, Sheng6e5d8652007-09-12 18:03:11 +08005087 vmcs_write32(TPR_THRESHOLD, 0);
5088 return;
5089 }
5090
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005091 vmcs_write32(TPR_THRESHOLD, irr);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08005092}
5093
Avi Kivity51aa01d2010-07-20 14:31:20 +03005094static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
Avi Kivitycf393f72008-07-01 16:20:21 +03005095{
Avi Kivity00eba012011-03-07 17:24:54 +02005096 u32 exit_intr_info;
5097
5098 if (!(vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY
5099 || vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI))
5100 return;
5101
Avi Kivityc5ca8e52011-03-07 17:37:37 +02005102 vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
Avi Kivity00eba012011-03-07 17:24:54 +02005103 exit_intr_info = vmx->exit_intr_info;
Andi Kleena0861c02009-06-08 17:37:09 +08005104
5105 /* Handle machine checks before interrupts are enabled */
Avi Kivity00eba012011-03-07 17:24:54 +02005106 if (is_machine_check(exit_intr_info))
Andi Kleena0861c02009-06-08 17:37:09 +08005107 kvm_machine_check();
5108
Gleb Natapov20f65982009-05-11 13:35:55 +03005109 /* We need to handle NMIs before interrupts are enabled */
Avi Kivity00eba012011-03-07 17:24:54 +02005110 if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005111 (exit_intr_info & INTR_INFO_VALID_MASK)) {
5112 kvm_before_handle_nmi(&vmx->vcpu);
Gleb Natapov20f65982009-05-11 13:35:55 +03005113 asm("int $2");
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08005114 kvm_after_handle_nmi(&vmx->vcpu);
5115 }
Avi Kivity51aa01d2010-07-20 14:31:20 +03005116}
Gleb Natapov20f65982009-05-11 13:35:55 +03005117
Avi Kivity51aa01d2010-07-20 14:31:20 +03005118static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx)
5119{
Avi Kivityc5ca8e52011-03-07 17:37:37 +02005120 u32 exit_intr_info;
Avi Kivity51aa01d2010-07-20 14:31:20 +03005121 bool unblock_nmi;
5122 u8 vector;
5123 bool idtv_info_valid;
5124
5125 idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Gleb Natapov20f65982009-05-11 13:35:55 +03005126
Avi Kivitycf393f72008-07-01 16:20:21 +03005127 if (cpu_has_virtual_nmis()) {
Avi Kivity9d58b932011-03-07 16:52:07 +02005128 if (vmx->nmi_known_unmasked)
5129 return;
Avi Kivityc5ca8e52011-03-07 17:37:37 +02005130 /*
5131 * Can't use vmx->exit_intr_info since we're not sure what
5132 * the exit reason is.
5133 */
5134 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
Avi Kivitycf393f72008-07-01 16:20:21 +03005135 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
5136 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
5137 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03005138 * SDM 3: 27.7.1.2 (September 2008)
Avi Kivitycf393f72008-07-01 16:20:21 +03005139 * Re-set bit "block by NMI" before VM entry if vmexit caused by
5140 * a guest IRET fault.
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03005141 * SDM 3: 23.2.2 (September 2008)
5142 * Bit 12 is undefined in any of the following cases:
5143 * If the VM exit sets the valid bit in the IDT-vectoring
5144 * information field.
5145 * If the VM exit is due to a double fault.
Avi Kivitycf393f72008-07-01 16:20:21 +03005146 */
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03005147 if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi &&
5148 vector != DF_VECTOR && !idtv_info_valid)
Avi Kivitycf393f72008-07-01 16:20:21 +03005149 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
5150 GUEST_INTR_STATE_NMI);
Avi Kivity9d58b932011-03-07 16:52:07 +02005151 else
5152 vmx->nmi_known_unmasked =
5153 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO)
5154 & GUEST_INTR_STATE_NMI);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02005155 } else if (unlikely(vmx->soft_vnmi_blocked))
5156 vmx->vnmi_blocked_time +=
5157 ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
Avi Kivity51aa01d2010-07-20 14:31:20 +03005158}
5159
Avi Kivity83422e12010-07-20 14:43:23 +03005160static void __vmx_complete_interrupts(struct vcpu_vmx *vmx,
5161 u32 idt_vectoring_info,
5162 int instr_len_field,
5163 int error_code_field)
Avi Kivity51aa01d2010-07-20 14:31:20 +03005164{
Avi Kivity51aa01d2010-07-20 14:31:20 +03005165 u8 vector;
5166 int type;
5167 bool idtv_info_valid;
5168
5169 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Avi Kivity668f6122008-07-02 09:28:55 +03005170
Gleb Natapov37b96e92009-03-30 16:03:13 +03005171 vmx->vcpu.arch.nmi_injected = false;
5172 kvm_clear_exception_queue(&vmx->vcpu);
5173 kvm_clear_interrupt_queue(&vmx->vcpu);
5174
5175 if (!idtv_info_valid)
5176 return;
5177
Avi Kivity3842d132010-07-27 12:30:24 +03005178 kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu);
5179
Avi Kivity668f6122008-07-02 09:28:55 +03005180 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
5181 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
Gleb Natapov37b96e92009-03-30 16:03:13 +03005182
Gleb Natapov64a7ec02009-03-30 16:03:29 +03005183 switch (type) {
Gleb Natapov37b96e92009-03-30 16:03:13 +03005184 case INTR_TYPE_NMI_INTR:
5185 vmx->vcpu.arch.nmi_injected = true;
Avi Kivity668f6122008-07-02 09:28:55 +03005186 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03005187 * SDM 3: 27.7.1.2 (September 2008)
Gleb Natapov37b96e92009-03-30 16:03:13 +03005188 * Clear bit "block by NMI" before VM entry if a NMI
5189 * delivery faulted.
Avi Kivity668f6122008-07-02 09:28:55 +03005190 */
Avi Kivity654f06f2011-03-23 15:02:47 +02005191 vmx_set_nmi_mask(&vmx->vcpu, false);
Gleb Natapov37b96e92009-03-30 16:03:13 +03005192 break;
Gleb Natapov37b96e92009-03-30 16:03:13 +03005193 case INTR_TYPE_SOFT_EXCEPTION:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005194 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03005195 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005196 /* fall through */
5197 case INTR_TYPE_HARD_EXCEPTION:
Avi Kivity35920a32008-07-03 14:50:12 +03005198 if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
Avi Kivity83422e12010-07-20 14:43:23 +03005199 u32 err = vmcs_read32(error_code_field);
Gleb Natapov37b96e92009-03-30 16:03:13 +03005200 kvm_queue_exception_e(&vmx->vcpu, vector, err);
Avi Kivity35920a32008-07-03 14:50:12 +03005201 } else
5202 kvm_queue_exception(&vmx->vcpu, vector);
Gleb Natapov37b96e92009-03-30 16:03:13 +03005203 break;
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005204 case INTR_TYPE_SOFT_INTR:
5205 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03005206 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005207 /* fall through */
Gleb Natapov37b96e92009-03-30 16:03:13 +03005208 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005209 kvm_queue_interrupt(&vmx->vcpu, vector,
5210 type == INTR_TYPE_SOFT_INTR);
Gleb Natapov37b96e92009-03-30 16:03:13 +03005211 break;
5212 default:
5213 break;
Avi Kivityf7d92382008-07-03 16:14:28 +03005214 }
Avi Kivitycf393f72008-07-01 16:20:21 +03005215}
5216
Avi Kivity83422e12010-07-20 14:43:23 +03005217static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
5218{
5219 __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info,
5220 VM_EXIT_INSTRUCTION_LEN,
5221 IDT_VECTORING_ERROR_CODE);
5222}
5223
Avi Kivityb463a6f2010-07-20 15:06:17 +03005224static void vmx_cancel_injection(struct kvm_vcpu *vcpu)
5225{
5226 __vmx_complete_interrupts(to_vmx(vcpu),
5227 vmcs_read32(VM_ENTRY_INTR_INFO_FIELD),
5228 VM_ENTRY_INSTRUCTION_LEN,
5229 VM_ENTRY_EXCEPTION_ERROR_CODE);
5230
5231 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
5232}
5233
Avi Kivityc8019492008-07-14 14:44:59 +03005234#ifdef CONFIG_X86_64
5235#define R "r"
5236#define Q "q"
5237#else
5238#define R "e"
5239#define Q "l"
5240#endif
5241
Lai Jiangshana3b5ba42011-02-11 14:29:40 +08005242static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08005243{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04005244 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity104f2262010-11-18 13:12:52 +02005245
5246 /* Record the guest's net vcpu time for enforced NMI injections. */
5247 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
5248 vmx->entry_time = ktime_get();
5249
5250 /* Don't enter VMX if guest state is invalid, let the exit handler
5251 start emulation until we arrive back to a valid state */
5252 if (vmx->emulation_required && emulate_invalid_guest_state)
5253 return;
5254
5255 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
5256 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
5257 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
5258 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
5259
5260 /* When single-stepping over STI and MOV SS, we must clear the
5261 * corresponding interruptibility bits in the guest state. Otherwise
5262 * vmentry fails as it then expects bit 14 (BS) in pending debug
5263 * exceptions being set, but that's not correct for the guest debugging
5264 * case. */
5265 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5266 vmx_set_interrupt_shadow(vcpu, 0);
5267
Nadav Har'Eld462b812011-05-24 15:26:10 +03005268 vmx->__launched = vmx->loaded_vmcs->launched;
Avi Kivity104f2262010-11-18 13:12:52 +02005269 asm(
Avi Kivity6aa8b732006-12-10 02:21:36 -08005270 /* Store host registers */
Avi Kivityc8019492008-07-14 14:44:59 +03005271 "push %%"R"dx; push %%"R"bp;"
Avi Kivity40712fa2011-01-06 18:09:12 +02005272 "push %%"R"cx \n\t" /* placeholder for guest rcx */
Avi Kivityc8019492008-07-14 14:44:59 +03005273 "push %%"R"cx \n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03005274 "cmp %%"R"sp, %c[host_rsp](%0) \n\t"
5275 "je 1f \n\t"
5276 "mov %%"R"sp, %c[host_rsp](%0) \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03005277 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03005278 "1: \n\t"
Avi Kivityd3edefc2009-06-16 12:33:56 +03005279 /* Reload cr2 if changed */
5280 "mov %c[cr2](%0), %%"R"ax \n\t"
5281 "mov %%cr2, %%"R"dx \n\t"
5282 "cmp %%"R"ax, %%"R"dx \n\t"
5283 "je 2f \n\t"
5284 "mov %%"R"ax, %%cr2 \n\t"
5285 "2: \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08005286 /* Check if vmlaunch of vmresume is needed */
Avi Kivitye08aa782007-11-15 18:06:18 +02005287 "cmpl $0, %c[launched](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08005288 /* Load guest registers. Don't clobber flags. */
Avi Kivityc8019492008-07-14 14:44:59 +03005289 "mov %c[rax](%0), %%"R"ax \n\t"
5290 "mov %c[rbx](%0), %%"R"bx \n\t"
5291 "mov %c[rdx](%0), %%"R"dx \n\t"
5292 "mov %c[rsi](%0), %%"R"si \n\t"
5293 "mov %c[rdi](%0), %%"R"di \n\t"
5294 "mov %c[rbp](%0), %%"R"bp \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08005295#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02005296 "mov %c[r8](%0), %%r8 \n\t"
5297 "mov %c[r9](%0), %%r9 \n\t"
5298 "mov %c[r10](%0), %%r10 \n\t"
5299 "mov %c[r11](%0), %%r11 \n\t"
5300 "mov %c[r12](%0), %%r12 \n\t"
5301 "mov %c[r13](%0), %%r13 \n\t"
5302 "mov %c[r14](%0), %%r14 \n\t"
5303 "mov %c[r15](%0), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08005304#endif
Avi Kivityc8019492008-07-14 14:44:59 +03005305 "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
5306
Avi Kivity6aa8b732006-12-10 02:21:36 -08005307 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03005308 "jne .Llaunched \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03005309 __ex(ASM_VMX_VMLAUNCH) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03005310 "jmp .Lkvm_vmx_return \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03005311 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03005312 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08005313 /* Save guest registers, load host registers, keep flags */
Avi Kivity40712fa2011-01-06 18:09:12 +02005314 "mov %0, %c[wordsize](%%"R"sp) \n\t"
5315 "pop %0 \n\t"
Avi Kivityc8019492008-07-14 14:44:59 +03005316 "mov %%"R"ax, %c[rax](%0) \n\t"
5317 "mov %%"R"bx, %c[rbx](%0) \n\t"
Avi Kivity1c696d02011-01-06 18:09:11 +02005318 "pop"Q" %c[rcx](%0) \n\t"
Avi Kivityc8019492008-07-14 14:44:59 +03005319 "mov %%"R"dx, %c[rdx](%0) \n\t"
5320 "mov %%"R"si, %c[rsi](%0) \n\t"
5321 "mov %%"R"di, %c[rdi](%0) \n\t"
5322 "mov %%"R"bp, %c[rbp](%0) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08005323#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02005324 "mov %%r8, %c[r8](%0) \n\t"
5325 "mov %%r9, %c[r9](%0) \n\t"
5326 "mov %%r10, %c[r10](%0) \n\t"
5327 "mov %%r11, %c[r11](%0) \n\t"
5328 "mov %%r12, %c[r12](%0) \n\t"
5329 "mov %%r13, %c[r13](%0) \n\t"
5330 "mov %%r14, %c[r14](%0) \n\t"
5331 "mov %%r15, %c[r15](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08005332#endif
Avi Kivityc8019492008-07-14 14:44:59 +03005333 "mov %%cr2, %%"R"ax \n\t"
5334 "mov %%"R"ax, %c[cr2](%0) \n\t"
5335
Avi Kivity1c696d02011-01-06 18:09:11 +02005336 "pop %%"R"bp; pop %%"R"dx \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02005337 "setbe %c[fail](%0) \n\t"
5338 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
Nadav Har'Eld462b812011-05-24 15:26:10 +03005339 [launched]"i"(offsetof(struct vcpu_vmx, __launched)),
Avi Kivitye08aa782007-11-15 18:06:18 +02005340 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
Avi Kivity313dbd42008-07-17 18:04:30 +03005341 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005342 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
5343 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
5344 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
5345 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
5346 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
5347 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
5348 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08005349#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005350 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
5351 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
5352 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
5353 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
5354 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
5355 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
5356 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
5357 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
Avi Kivity6aa8b732006-12-10 02:21:36 -08005358#endif
Avi Kivity40712fa2011-01-06 18:09:12 +02005359 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)),
5360 [wordsize]"i"(sizeof(ulong))
Laurent Vivierc2036302007-10-25 14:18:52 +02005361 : "cc", "memory"
Jan Kiszka07d6f552010-09-28 16:37:42 +02005362 , R"ax", R"bx", R"di", R"si"
Laurent Vivierc2036302007-10-25 14:18:52 +02005363#ifdef CONFIG_X86_64
Laurent Vivierc2036302007-10-25 14:18:52 +02005364 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
5365#endif
5366 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08005367
Avi Kivity6de4f3a2009-05-31 22:58:47 +03005368 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
Avi Kivity6de12732011-03-07 12:51:22 +02005369 | (1 << VCPU_EXREG_RFLAGS)
Avi Kivity69c73022011-03-07 15:26:44 +02005370 | (1 << VCPU_EXREG_CPL)
Avi Kivityaff48ba2010-12-05 18:56:11 +02005371 | (1 << VCPU_EXREG_PDPTR)
Avi Kivity2fb92db2011-04-27 19:42:18 +03005372 | (1 << VCPU_EXREG_SEGMENTS)
Avi Kivityaff48ba2010-12-05 18:56:11 +02005373 | (1 << VCPU_EXREG_CR3));
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005374 vcpu->arch.regs_dirty = 0;
5375
Avi Kivity1155f762007-11-22 11:30:47 +02005376 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
5377
Mike Dayd77c26f2007-10-08 09:02:08 -04005378 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Nadav Har'Eld462b812011-05-24 15:26:10 +03005379 vmx->loaded_vmcs->launched = 1;
Avi Kivity1b6269d2007-10-09 12:12:19 +02005380
Avi Kivity51aa01d2010-07-20 14:31:20 +03005381 vmx->exit_reason = vmcs_read32(VM_EXIT_REASON);
Avi Kivity51aa01d2010-07-20 14:31:20 +03005382
5383 vmx_complete_atomic_exit(vmx);
5384 vmx_recover_nmi_blocking(vmx);
Avi Kivitycf393f72008-07-01 16:20:21 +03005385 vmx_complete_interrupts(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08005386}
5387
Avi Kivityc8019492008-07-14 14:44:59 +03005388#undef R
5389#undef Q
5390
Avi Kivity6aa8b732006-12-10 02:21:36 -08005391static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
5392{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005393 struct vcpu_vmx *vmx = to_vmx(vcpu);
5394
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08005395 free_vpid(vmx);
Nadav Har'Elec378ae2011-05-25 23:02:54 +03005396 free_nested(vmx);
Nadav Har'Eld462b812011-05-24 15:26:10 +03005397 free_loaded_vmcs(vmx->loaded_vmcs);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005398 kfree(vmx->guest_msrs);
5399 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10005400 kmem_cache_free(kvm_vcpu_cache, vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08005401}
5402
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005403static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08005404{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005405 int err;
Rusty Russellc16f8622007-07-30 21:12:19 +10005406 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Avi Kivity15ad7142007-07-11 18:17:21 +03005407 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08005408
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04005409 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005410 return ERR_PTR(-ENOMEM);
5411
Sheng Yang2384d2b2008-01-17 15:14:33 +08005412 allocate_vpid(vmx);
5413
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005414 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
5415 if (err)
5416 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08005417
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04005418 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Jan Kiszkabe6d05c2011-04-13 01:27:55 +02005419 err = -ENOMEM;
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005420 if (!vmx->guest_msrs) {
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005421 goto uninit_vcpu;
5422 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08005423
Nadav Har'Eld462b812011-05-24 15:26:10 +03005424 vmx->loaded_vmcs = &vmx->vmcs01;
5425 vmx->loaded_vmcs->vmcs = alloc_vmcs();
5426 if (!vmx->loaded_vmcs->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005427 goto free_msrs;
Nadav Har'Eld462b812011-05-24 15:26:10 +03005428 if (!vmm_exclusive)
5429 kvm_cpu_vmxon(__pa(per_cpu(vmxarea, raw_smp_processor_id())));
5430 loaded_vmcs_init(vmx->loaded_vmcs);
5431 if (!vmm_exclusive)
5432 kvm_cpu_vmxoff();
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04005433
Avi Kivity15ad7142007-07-11 18:17:21 +03005434 cpu = get_cpu();
5435 vmx_vcpu_load(&vmx->vcpu, cpu);
Zachary Amsdene48672f2010-08-19 22:07:23 -10005436 vmx->vcpu.cpu = cpu;
Rusty Russell8b9cf982007-07-30 16:31:43 +10005437 err = vmx_vcpu_setup(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005438 vmx_vcpu_put(&vmx->vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03005439 put_cpu();
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005440 if (err)
5441 goto free_vmcs;
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02005442 if (vm_need_virtualize_apic_accesses(kvm))
Jan Kiszkabe6d05c2011-04-13 01:27:55 +02005443 err = alloc_apic_access_page(kvm);
5444 if (err)
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02005445 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08005446
Sheng Yangb927a3c2009-07-21 10:42:48 +08005447 if (enable_ept) {
5448 if (!kvm->arch.ept_identity_map_addr)
5449 kvm->arch.ept_identity_map_addr =
5450 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
Gleb Natapov93ea5382011-02-21 12:07:59 +02005451 err = -ENOMEM;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08005452 if (alloc_identity_pagetable(kvm) != 0)
5453 goto free_vmcs;
Gleb Natapov93ea5382011-02-21 12:07:59 +02005454 if (!init_rmode_identity_map(kvm))
5455 goto free_vmcs;
Sheng Yangb927a3c2009-07-21 10:42:48 +08005456 }
Sheng Yangb7ebfb02008-04-25 21:44:52 +08005457
Nadav Har'Ela9d30f32011-05-25 23:03:55 +03005458 vmx->nested.current_vmptr = -1ull;
5459 vmx->nested.current_vmcs12 = NULL;
5460
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005461 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08005462
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005463free_vmcs:
Nadav Har'Eld462b812011-05-24 15:26:10 +03005464 free_vmcs(vmx->loaded_vmcs->vmcs);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005465free_msrs:
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005466 kfree(vmx->guest_msrs);
5467uninit_vcpu:
5468 kvm_vcpu_uninit(&vmx->vcpu);
5469free_vcpu:
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08005470 free_vpid(vmx);
Rusty Russella4770342007-08-01 14:46:11 +10005471 kmem_cache_free(kvm_vcpu_cache, vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10005472 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08005473}
5474
Yang, Sheng002c7f72007-07-31 14:23:01 +03005475static void __init vmx_check_processor_compat(void *rtn)
5476{
5477 struct vmcs_config vmcs_conf;
5478
5479 *(int *)rtn = 0;
5480 if (setup_vmcs_config(&vmcs_conf) < 0)
5481 *(int *)rtn = -EIO;
5482 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
5483 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
5484 smp_processor_id());
5485 *(int *)rtn = -EIO;
5486 }
5487}
5488
Sheng Yang67253af2008-04-25 10:20:22 +08005489static int get_ept_level(void)
5490{
5491 return VMX_EPT_DEFAULT_GAW + 1;
5492}
5493
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005494static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08005495{
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005496 u64 ret;
5497
Sheng Yang522c68c2009-04-27 20:35:43 +08005498 /* For VT-d and EPT combination
5499 * 1. MMIO: always map as UC
5500 * 2. EPT with VT-d:
5501 * a. VT-d without snooping control feature: can't guarantee the
5502 * result, try to trust guest.
5503 * b. VT-d with snooping control feature: snooping control feature of
5504 * VT-d engine can guarantee the cache correctness. Just set it
5505 * to WB to keep consistent with host. So the same as item 3.
Sheng Yanga19a6d12010-02-09 16:41:53 +08005506 * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep
Sheng Yang522c68c2009-04-27 20:35:43 +08005507 * consistent with host MTRR
5508 */
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005509 if (is_mmio)
5510 ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang522c68c2009-04-27 20:35:43 +08005511 else if (vcpu->kvm->arch.iommu_domain &&
5512 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
5513 ret = kvm_get_guest_memory_type(vcpu, gfn) <<
5514 VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005515 else
Sheng Yang522c68c2009-04-27 20:35:43 +08005516 ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
Sheng Yanga19a6d12010-02-09 16:41:53 +08005517 | VMX_EPT_IPAT_BIT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005518
5519 return ret;
Sheng Yang64d4d522008-10-09 16:01:57 +08005520}
5521
Avi Kivityf4c9e872009-12-28 16:06:35 +02005522#define _ER(x) { EXIT_REASON_##x, #x }
5523
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005524static const struct trace_print_flags vmx_exit_reasons_str[] = {
Avi Kivityf4c9e872009-12-28 16:06:35 +02005525 _ER(EXCEPTION_NMI),
5526 _ER(EXTERNAL_INTERRUPT),
5527 _ER(TRIPLE_FAULT),
5528 _ER(PENDING_INTERRUPT),
5529 _ER(NMI_WINDOW),
5530 _ER(TASK_SWITCH),
5531 _ER(CPUID),
5532 _ER(HLT),
5533 _ER(INVLPG),
5534 _ER(RDPMC),
5535 _ER(RDTSC),
5536 _ER(VMCALL),
5537 _ER(VMCLEAR),
5538 _ER(VMLAUNCH),
5539 _ER(VMPTRLD),
5540 _ER(VMPTRST),
5541 _ER(VMREAD),
5542 _ER(VMRESUME),
5543 _ER(VMWRITE),
5544 _ER(VMOFF),
5545 _ER(VMON),
5546 _ER(CR_ACCESS),
5547 _ER(DR_ACCESS),
5548 _ER(IO_INSTRUCTION),
5549 _ER(MSR_READ),
5550 _ER(MSR_WRITE),
5551 _ER(MWAIT_INSTRUCTION),
5552 _ER(MONITOR_INSTRUCTION),
5553 _ER(PAUSE_INSTRUCTION),
5554 _ER(MCE_DURING_VMENTRY),
5555 _ER(TPR_BELOW_THRESHOLD),
5556 _ER(APIC_ACCESS),
5557 _ER(EPT_VIOLATION),
5558 _ER(EPT_MISCONFIG),
5559 _ER(WBINVD),
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005560 { -1, NULL }
5561};
5562
Avi Kivityf4c9e872009-12-28 16:06:35 +02005563#undef _ER
5564
Sheng Yang17cc3932010-01-05 19:02:27 +08005565static int vmx_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02005566{
Sheng Yang878403b2010-01-05 19:02:29 +08005567 if (enable_ept && !cpu_has_vmx_ept_1g_page())
5568 return PT_DIRECTORY_LEVEL;
5569 else
5570 /* For shadow and EPT supported 1GB page */
5571 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02005572}
5573
Sheng Yang0e851882009-12-18 16:48:46 +08005574static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
5575{
Sheng Yang4e47c7a2009-12-18 16:48:47 +08005576 struct kvm_cpuid_entry2 *best;
5577 struct vcpu_vmx *vmx = to_vmx(vcpu);
5578 u32 exec_control;
5579
5580 vmx->rdtscp_enabled = false;
5581 if (vmx_rdtscp_supported()) {
5582 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
5583 if (exec_control & SECONDARY_EXEC_RDTSCP) {
5584 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
5585 if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
5586 vmx->rdtscp_enabled = true;
5587 else {
5588 exec_control &= ~SECONDARY_EXEC_RDTSCP;
5589 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
5590 exec_control);
5591 }
5592 }
5593 }
Sheng Yang0e851882009-12-18 16:48:46 +08005594}
5595
Joerg Roedeld4330ef2010-04-22 12:33:11 +02005596static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
5597{
5598}
5599
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02005600static int vmx_check_intercept(struct kvm_vcpu *vcpu,
5601 struct x86_instruction_info *info,
5602 enum x86_intercept_stage stage)
5603{
5604 return X86EMUL_CONTINUE;
5605}
5606
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03005607static struct kvm_x86_ops vmx_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08005608 .cpu_has_kvm_support = cpu_has_kvm_support,
5609 .disabled_by_bios = vmx_disabled_by_bios,
5610 .hardware_setup = hardware_setup,
5611 .hardware_unsetup = hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03005612 .check_processor_compatibility = vmx_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005613 .hardware_enable = hardware_enable,
5614 .hardware_disable = hardware_disable,
Sheng Yang04547152009-04-01 15:52:31 +08005615 .cpu_has_accelerated_tpr = report_flexpriority,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005616
5617 .vcpu_create = vmx_create_vcpu,
5618 .vcpu_free = vmx_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03005619 .vcpu_reset = vmx_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005620
Avi Kivity04d2cc72007-09-10 18:10:54 +03005621 .prepare_guest_switch = vmx_save_host_state,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005622 .vcpu_load = vmx_vcpu_load,
5623 .vcpu_put = vmx_vcpu_put,
5624
5625 .set_guest_debug = set_guest_debug,
5626 .get_msr = vmx_get_msr,
5627 .set_msr = vmx_set_msr,
5628 .get_segment_base = vmx_get_segment_base,
5629 .get_segment = vmx_get_segment,
5630 .set_segment = vmx_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02005631 .get_cpl = vmx_get_cpl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005632 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02005633 .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
Avi Kivityaff48ba2010-12-05 18:56:11 +02005634 .decache_cr3 = vmx_decache_cr3,
Anthony Liguori25c4c272007-04-27 09:29:21 +03005635 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005636 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005637 .set_cr3 = vmx_set_cr3,
5638 .set_cr4 = vmx_set_cr4,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005639 .set_efer = vmx_set_efer,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005640 .get_idt = vmx_get_idt,
5641 .set_idt = vmx_set_idt,
5642 .get_gdt = vmx_get_gdt,
5643 .set_gdt = vmx_set_gdt,
Gleb Natapov020df072010-04-13 10:05:23 +03005644 .set_dr7 = vmx_set_dr7,
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005645 .cache_reg = vmx_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005646 .get_rflags = vmx_get_rflags,
5647 .set_rflags = vmx_set_rflags,
Avi Kivityebcbab42010-02-07 11:56:52 +02005648 .fpu_activate = vmx_fpu_activate,
Avi Kivity02daab22009-12-30 12:40:26 +02005649 .fpu_deactivate = vmx_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005650
5651 .tlb_flush = vmx_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005652
Avi Kivity6aa8b732006-12-10 02:21:36 -08005653 .run = vmx_vcpu_run,
Avi Kivity6062d012009-03-23 17:35:17 +02005654 .handle_exit = vmx_handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005655 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04005656 .set_interrupt_shadow = vmx_set_interrupt_shadow,
5657 .get_interrupt_shadow = vmx_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02005658 .patch_hypercall = vmx_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03005659 .set_irq = vmx_inject_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005660 .set_nmi = vmx_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02005661 .queue_exception = vmx_queue_exception,
Avi Kivityb463a6f2010-07-20 15:06:17 +03005662 .cancel_injection = vmx_cancel_injection,
Gleb Natapov78646122009-03-23 12:12:11 +02005663 .interrupt_allowed = vmx_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005664 .nmi_allowed = vmx_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01005665 .get_nmi_mask = vmx_get_nmi_mask,
5666 .set_nmi_mask = vmx_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005667 .enable_nmi_window = enable_nmi_window,
5668 .enable_irq_window = enable_irq_window,
5669 .update_cr8_intercept = update_cr8_intercept,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005670
Izik Eiduscbc94022007-10-25 00:29:55 +02005671 .set_tss_addr = vmx_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08005672 .get_tdp_level = get_ept_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005673 .get_mt_mask = vmx_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005674
Avi Kivity586f9602010-11-18 13:09:54 +02005675 .get_exit_info = vmx_get_exit_info,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005676 .exit_reasons_str = vmx_exit_reasons_str,
Avi Kivity586f9602010-11-18 13:09:54 +02005677
Sheng Yang17cc3932010-01-05 19:02:27 +08005678 .get_lpage_level = vmx_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08005679
5680 .cpuid_update = vmx_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08005681
5682 .rdtscp_supported = vmx_rdtscp_supported,
Joerg Roedeld4330ef2010-04-22 12:33:11 +02005683
5684 .set_supported_cpuid = vmx_set_supported_cpuid,
Sheng Yangf5f48ee2010-06-30 12:25:15 +08005685
5686 .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
Zachary Amsden99e3e302010-08-19 22:07:17 -10005687
Joerg Roedel4051b182011-03-25 09:44:49 +01005688 .set_tsc_khz = vmx_set_tsc_khz,
Zachary Amsden99e3e302010-08-19 22:07:17 -10005689 .write_tsc_offset = vmx_write_tsc_offset,
Zachary Amsdene48672f2010-08-19 22:07:23 -10005690 .adjust_tsc_offset = vmx_adjust_tsc_offset,
Joerg Roedel857e4092011-03-25 09:44:50 +01005691 .compute_tsc_offset = vmx_compute_tsc_offset,
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02005692
5693 .set_tdp_cr3 = vmx_set_cr3,
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02005694
5695 .check_intercept = vmx_check_intercept,
Avi Kivity6aa8b732006-12-10 02:21:36 -08005696};
5697
5698static int __init vmx_init(void)
5699{
Avi Kivity26bb0982009-09-07 11:14:12 +03005700 int r, i;
5701
5702 rdmsrl_safe(MSR_EFER, &host_efer);
5703
5704 for (i = 0; i < NR_VMX_MSR; ++i)
5705 kvm_define_shared_msr(i, vmx_msr_index[i]);
He, Qingfdef3ad2007-04-30 09:45:24 +03005706
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005707 vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03005708 if (!vmx_io_bitmap_a)
5709 return -ENOMEM;
5710
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005711 vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03005712 if (!vmx_io_bitmap_b) {
5713 r = -ENOMEM;
5714 goto out;
5715 }
5716
Avi Kivity58972972009-02-24 22:26:47 +02005717 vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
5718 if (!vmx_msr_bitmap_legacy) {
Sheng Yang25c5f222008-03-28 13:18:56 +08005719 r = -ENOMEM;
5720 goto out1;
5721 }
5722
Avi Kivity58972972009-02-24 22:26:47 +02005723 vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
5724 if (!vmx_msr_bitmap_longmode) {
5725 r = -ENOMEM;
5726 goto out2;
5727 }
5728
He, Qingfdef3ad2007-04-30 09:45:24 +03005729 /*
5730 * Allow direct access to the PC debug port (it is often used for I/O
5731 * delays, but the vmexits simply slow things down).
5732 */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005733 memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
5734 clear_bit(0x80, vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03005735
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005736 memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
He, Qingfdef3ad2007-04-30 09:45:24 +03005737
Avi Kivity58972972009-02-24 22:26:47 +02005738 memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
5739 memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
Sheng Yang25c5f222008-03-28 13:18:56 +08005740
Sheng Yang2384d2b2008-01-17 15:14:33 +08005741 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
5742
Avi Kivity0ee75be2010-04-28 15:39:01 +03005743 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
5744 __alignof__(struct vcpu_vmx), THIS_MODULE);
He, Qingfdef3ad2007-04-30 09:45:24 +03005745 if (r)
Avi Kivity58972972009-02-24 22:26:47 +02005746 goto out3;
Sheng Yang25c5f222008-03-28 13:18:56 +08005747
Avi Kivity58972972009-02-24 22:26:47 +02005748 vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
5749 vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
5750 vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
5751 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
5752 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
5753 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
He, Qingfdef3ad2007-04-30 09:45:24 +03005754
Avi Kivity089d0342009-03-23 18:26:32 +02005755 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08005756 bypass_guest_pf = 0;
Sheng Yang534e38b2008-09-08 15:12:30 +08005757 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08005758 VMX_EPT_EXECUTABLE_MASK);
Sheng Yang5fdbcb92008-07-16 09:25:40 +08005759 kvm_enable_tdp();
5760 } else
5761 kvm_disable_tdp();
Sheng Yang14394422008-04-28 12:24:45 +08005762
Avi Kivityc7addb92007-09-16 18:58:32 +02005763 if (bypass_guest_pf)
5764 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
5765
He, Qingfdef3ad2007-04-30 09:45:24 +03005766 return 0;
5767
Avi Kivity58972972009-02-24 22:26:47 +02005768out3:
5769 free_page((unsigned long)vmx_msr_bitmap_longmode);
Sheng Yang25c5f222008-03-28 13:18:56 +08005770out2:
Avi Kivity58972972009-02-24 22:26:47 +02005771 free_page((unsigned long)vmx_msr_bitmap_legacy);
He, Qingfdef3ad2007-04-30 09:45:24 +03005772out1:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005773 free_page((unsigned long)vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03005774out:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005775 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03005776 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08005777}
5778
5779static void __exit vmx_exit(void)
5780{
Avi Kivity58972972009-02-24 22:26:47 +02005781 free_page((unsigned long)vmx_msr_bitmap_legacy);
5782 free_page((unsigned long)vmx_msr_bitmap_longmode);
Avi Kivity3e7c73e2009-02-24 21:46:19 +02005783 free_page((unsigned long)vmx_io_bitmap_b);
5784 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03005785
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08005786 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08005787}
5788
5789module_init(vmx_init)
5790module_exit(vmx_exit)