blob: a713c69bfceeafd2ea4c1d4374f83e0282dc8614 [file] [log] [blame]
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)
46
Avi Kivity6aa8b732006-12-10 02:21:36 -080047MODULE_AUTHOR("Qumranet");
48MODULE_LICENSE("GPL");
49
Avi Kivity4462d212009-03-23 17:53:37 +020050static int __read_mostly bypass_guest_pf = 1;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020051module_param(bypass_guest_pf, bool, S_IRUGO);
Avi Kivityc7addb92007-09-16 18:58:32 +020052
Avi Kivity4462d212009-03-23 17:53:37 +020053static int __read_mostly enable_vpid = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020054module_param_named(vpid, enable_vpid, bool, 0444);
Sheng Yang2384d2b2008-01-17 15:14:33 +080055
Avi Kivity4462d212009-03-23 17:53:37 +020056static int __read_mostly flexpriority_enabled = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020057module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO);
Avi Kivity4c9fc8e2008-03-24 18:15:14 +020058
Avi Kivity4462d212009-03-23 17:53:37 +020059static int __read_mostly enable_ept = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020060module_param_named(ept, enable_ept, bool, S_IRUGO);
Sheng Yangd56f5462008-04-25 10:13:16 +080061
Nitin A Kamble3a624e22009-06-08 11:34:16 -070062static int __read_mostly enable_unrestricted_guest = 1;
63module_param_named(unrestricted_guest,
64 enable_unrestricted_guest, bool, S_IRUGO);
65
Avi Kivity4462d212009-03-23 17:53:37 +020066static int __read_mostly emulate_invalid_guest_state = 0;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020067module_param(emulate_invalid_guest_state, bool, S_IRUGO);
Mohammed Gamal04fa4d32008-08-17 16:39:48 +030068
Dongxiao Xub923e622010-05-11 18:29:45 +080069static int __read_mostly vmm_exclusive = 1;
70module_param(vmm_exclusive, bool, S_IRUGO);
71
Anthony Liguori443381a2010-12-06 10:53:38 -060072static int __read_mostly yield_on_hlt = 1;
73module_param(yield_on_hlt, bool, S_IRUGO);
74
Avi Kivitycdc0e242009-12-06 17:21:14 +020075#define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \
76 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
77#define KVM_GUEST_CR0_MASK \
78 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
79#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \
Avi Kivity81231c62010-01-24 16:26:40 +020080 (X86_CR0_WP | X86_CR0_NE)
Avi Kivitycdc0e242009-12-06 17:21:14 +020081#define KVM_VM_CR0_ALWAYS_ON \
82 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
Avi Kivity4c386092009-12-07 12:26:18 +020083#define KVM_CR4_GUEST_OWNED_BITS \
84 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
85 | X86_CR4_OSXMMEXCPT)
86
Avi Kivitycdc0e242009-12-06 17:21:14 +020087#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
88#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
89
Avi Kivity78ac8b42010-04-08 18:19:35 +030090#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
91
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +080092/*
93 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
94 * ple_gap: upper bound on the amount of time between two successive
95 * executions of PAUSE in a loop. Also indicate if ple enabled.
96 * According to test, this time is usually small than 41 cycles.
97 * ple_window: upper bound on the amount of time a guest is allowed to execute
98 * in a PAUSE loop. Tests indicate that most spinlocks are held for
99 * less than 2^12 cycles
100 * Time is measured based on a counter that runs at the same rate as the TSC,
101 * refer SDM volume 3b section 21.6.13 & 22.1.3.
102 */
103#define KVM_VMX_DEFAULT_PLE_GAP 41
104#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
105static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
106module_param(ple_gap, int, S_IRUGO);
107
108static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
109module_param(ple_window, int, S_IRUGO);
110
Avi Kivity61d2ef22010-04-28 16:40:38 +0300111#define NR_AUTOLOAD_MSRS 1
112
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400113struct vmcs {
114 u32 revision_id;
115 u32 abort;
116 char data[0];
117};
118
Avi Kivity26bb0982009-09-07 11:14:12 +0300119struct shared_msr_entry {
120 unsigned index;
121 u64 data;
Avi Kivityd5696722009-12-02 12:28:47 +0200122 u64 mask;
Avi Kivity26bb0982009-09-07 11:14:12 +0300123};
124
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400125struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000126 struct kvm_vcpu vcpu;
Avi Kivity543e4242008-05-13 16:22:47 +0300127 struct list_head local_vcpus_link;
Avi Kivity313dbd42008-07-17 18:04:30 +0300128 unsigned long host_rsp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400129 int launched;
Avi Kivity29bd8a72007-09-10 17:27:03 +0300130 u8 fail;
Avi Kivity51aa01d2010-07-20 14:31:20 +0300131 u32 exit_intr_info;
Avi Kivity1155f762007-11-22 11:30:47 +0200132 u32 idt_vectoring_info;
Avi Kivity26bb0982009-09-07 11:14:12 +0300133 struct shared_msr_entry *guest_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400134 int nmsrs;
135 int save_nmsrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400136#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300137 u64 msr_host_kernel_gs_base;
138 u64 msr_guest_kernel_gs_base;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400139#endif
140 struct vmcs *vmcs;
Avi Kivity61d2ef22010-04-28 16:40:38 +0300141 struct msr_autoload {
142 unsigned nr;
143 struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS];
144 struct vmx_msr_entry host[NR_AUTOLOAD_MSRS];
145 } msr_autoload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400146 struct {
147 int loaded;
148 u16 fs_sel, gs_sel, ldt_sel;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200149 int gs_ldt_reload_needed;
150 int fs_reload_needed;
Mike Dayd77c26f2007-10-08 09:02:08 -0400151 } host_state;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200152 struct {
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300153 int vm86_active;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300154 ulong save_rflags;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300155 struct kvm_save_segment {
156 u16 selector;
157 unsigned long base;
158 u32 limit;
159 u32 ar;
160 } tr, es, ds, fs, gs;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200161 } rmode;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800162 int vpid;
Mohammed Gamal04fa4d32008-08-17 16:39:48 +0300163 bool emulation_required;
Jan Kiszka3b86cd92008-09-26 09:30:57 +0200164
165 /* Support for vnmi-less CPUs */
166 int soft_vnmi_blocked;
167 ktime_t entry_time;
168 s64 vnmi_blocked_time;
Andi Kleena0861c02009-06-08 17:37:09 +0800169 u32 exit_reason;
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800170
171 bool rdtscp_enabled;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400172};
173
174static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
175{
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000176 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400177}
178
Sheng Yangb7ebfb02008-04-25 21:44:52 +0800179static int init_rmode(struct kvm *kvm);
Sheng Yang4e1096d2008-07-06 19:16:51 +0800180static u64 construct_eptp(unsigned long root_hpa);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800181static void kvm_cpu_vmxon(u64 addr);
182static void kvm_cpu_vmxoff(void);
Avi Kivity75880a02007-06-20 11:20:04 +0300183
Avi Kivity6aa8b732006-12-10 02:21:36 -0800184static DEFINE_PER_CPU(struct vmcs *, vmxarea);
185static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
Avi Kivity543e4242008-05-13 16:22:47 +0300186static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
Avi Kivity3444d7d2010-07-26 18:32:38 +0300187static DEFINE_PER_CPU(struct desc_ptr, host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800188
Avi Kivity3e7c73e2009-02-24 21:46:19 +0200189static unsigned long *vmx_io_bitmap_a;
190static unsigned long *vmx_io_bitmap_b;
Avi Kivity58972972009-02-24 22:26:47 +0200191static unsigned long *vmx_msr_bitmap_legacy;
192static unsigned long *vmx_msr_bitmap_longmode;
He, Qingfdef3ad2007-04-30 09:45:24 +0300193
Avi Kivity110312c2010-12-21 12:54:20 +0200194static bool cpu_has_load_ia32_efer;
195
Sheng Yang2384d2b2008-01-17 15:14:33 +0800196static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
197static DEFINE_SPINLOCK(vmx_vpid_lock);
198
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300199static struct vmcs_config {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800200 int size;
201 int order;
202 u32 revision_id;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300203 u32 pin_based_exec_ctrl;
204 u32 cpu_based_exec_ctrl;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800205 u32 cpu_based_2nd_exec_ctrl;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300206 u32 vmexit_ctrl;
207 u32 vmentry_ctrl;
208} vmcs_config;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800209
Hannes Ederefff9e52008-11-28 17:02:06 +0100210static struct vmx_capability {
Sheng Yangd56f5462008-04-25 10:13:16 +0800211 u32 ept;
212 u32 vpid;
213} vmx_capability;
214
Avi Kivity6aa8b732006-12-10 02:21:36 -0800215#define VMX_SEGMENT_FIELD(seg) \
216 [VCPU_SREG_##seg] = { \
217 .selector = GUEST_##seg##_SELECTOR, \
218 .base = GUEST_##seg##_BASE, \
219 .limit = GUEST_##seg##_LIMIT, \
220 .ar_bytes = GUEST_##seg##_AR_BYTES, \
221 }
222
223static struct kvm_vmx_segment_field {
224 unsigned selector;
225 unsigned base;
226 unsigned limit;
227 unsigned ar_bytes;
228} kvm_vmx_segment_fields[] = {
229 VMX_SEGMENT_FIELD(CS),
230 VMX_SEGMENT_FIELD(DS),
231 VMX_SEGMENT_FIELD(ES),
232 VMX_SEGMENT_FIELD(FS),
233 VMX_SEGMENT_FIELD(GS),
234 VMX_SEGMENT_FIELD(SS),
235 VMX_SEGMENT_FIELD(TR),
236 VMX_SEGMENT_FIELD(LDTR),
237};
238
Avi Kivity26bb0982009-09-07 11:14:12 +0300239static u64 host_efer;
240
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300241static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
242
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300243/*
Brian Gerst8c065852010-07-17 09:03:26 -0400244 * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300245 * away by decrementing the array size.
246 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800247static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800248#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300249 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800250#endif
Brian Gerst8c065852010-07-17 09:03:26 -0400251 MSR_EFER, MSR_TSC_AUX, MSR_STAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800252};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200253#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800254
Gui Jianfeng31299942010-03-15 17:29:09 +0800255static inline bool is_page_fault(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800256{
257 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
258 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100259 (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800260}
261
Gui Jianfeng31299942010-03-15 17:29:09 +0800262static inline bool is_no_device(u32 intr_info)
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300263{
264 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
265 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100266 (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300267}
268
Gui Jianfeng31299942010-03-15 17:29:09 +0800269static inline bool is_invalid_opcode(u32 intr_info)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500270{
271 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
272 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100273 (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500274}
275
Gui Jianfeng31299942010-03-15 17:29:09 +0800276static inline bool is_external_interrupt(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800277{
278 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
279 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
280}
281
Gui Jianfeng31299942010-03-15 17:29:09 +0800282static inline bool is_machine_check(u32 intr_info)
Andi Kleena0861c02009-06-08 17:37:09 +0800283{
284 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
285 INTR_INFO_VALID_MASK)) ==
286 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
287}
288
Gui Jianfeng31299942010-03-15 17:29:09 +0800289static inline bool cpu_has_vmx_msr_bitmap(void)
Sheng Yang25c5f222008-03-28 13:18:56 +0800290{
Sheng Yang04547152009-04-01 15:52:31 +0800291 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS;
Sheng Yang25c5f222008-03-28 13:18:56 +0800292}
293
Gui Jianfeng31299942010-03-15 17:29:09 +0800294static inline bool cpu_has_vmx_tpr_shadow(void)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800295{
Sheng Yang04547152009-04-01 15:52:31 +0800296 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW;
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800297}
298
Gui Jianfeng31299942010-03-15 17:29:09 +0800299static inline bool vm_need_tpr_shadow(struct kvm *kvm)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800300{
Sheng Yang04547152009-04-01 15:52:31 +0800301 return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm));
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800302}
303
Gui Jianfeng31299942010-03-15 17:29:09 +0800304static inline bool cpu_has_secondary_exec_ctrls(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800305{
Sheng Yang04547152009-04-01 15:52:31 +0800306 return vmcs_config.cpu_based_exec_ctrl &
307 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800308}
309
Avi Kivity774ead32007-12-26 13:57:04 +0200310static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800311{
Sheng Yang04547152009-04-01 15:52:31 +0800312 return vmcs_config.cpu_based_2nd_exec_ctrl &
313 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
314}
315
316static inline bool cpu_has_vmx_flexpriority(void)
317{
318 return cpu_has_vmx_tpr_shadow() &&
319 cpu_has_vmx_virtualize_apic_accesses();
Sheng Yangf78e0e22007-10-29 09:40:42 +0800320}
321
Marcelo Tosattie7997942009-06-11 12:07:40 -0300322static inline bool cpu_has_vmx_ept_execute_only(void)
323{
Gui Jianfeng31299942010-03-15 17:29:09 +0800324 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300325}
326
327static inline bool cpu_has_vmx_eptp_uncacheable(void)
328{
Gui Jianfeng31299942010-03-15 17:29:09 +0800329 return vmx_capability.ept & VMX_EPTP_UC_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300330}
331
332static inline bool cpu_has_vmx_eptp_writeback(void)
333{
Gui Jianfeng31299942010-03-15 17:29:09 +0800334 return vmx_capability.ept & VMX_EPTP_WB_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300335}
336
337static inline bool cpu_has_vmx_ept_2m_page(void)
338{
Gui Jianfeng31299942010-03-15 17:29:09 +0800339 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300340}
341
Sheng Yang878403b2010-01-05 19:02:29 +0800342static inline bool cpu_has_vmx_ept_1g_page(void)
343{
Gui Jianfeng31299942010-03-15 17:29:09 +0800344 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;
Sheng Yang878403b2010-01-05 19:02:29 +0800345}
346
Sheng Yang4bc9b982010-06-02 14:05:24 +0800347static inline bool cpu_has_vmx_ept_4levels(void)
348{
349 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT;
350}
351
Gui Jianfeng31299942010-03-15 17:29:09 +0800352static inline bool cpu_has_vmx_invept_individual_addr(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800353{
Gui Jianfeng31299942010-03-15 17:29:09 +0800354 return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800355}
356
Gui Jianfeng31299942010-03-15 17:29:09 +0800357static inline bool cpu_has_vmx_invept_context(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800358{
Gui Jianfeng31299942010-03-15 17:29:09 +0800359 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800360}
361
Gui Jianfeng31299942010-03-15 17:29:09 +0800362static inline bool cpu_has_vmx_invept_global(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800363{
Gui Jianfeng31299942010-03-15 17:29:09 +0800364 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800365}
366
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800367static inline bool cpu_has_vmx_invvpid_single(void)
368{
369 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
370}
371
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800372static inline bool cpu_has_vmx_invvpid_global(void)
373{
374 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT;
375}
376
Gui Jianfeng31299942010-03-15 17:29:09 +0800377static inline bool cpu_has_vmx_ept(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800378{
Sheng Yang04547152009-04-01 15:52:31 +0800379 return vmcs_config.cpu_based_2nd_exec_ctrl &
380 SECONDARY_EXEC_ENABLE_EPT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800381}
382
Gui Jianfeng31299942010-03-15 17:29:09 +0800383static inline bool cpu_has_vmx_unrestricted_guest(void)
Nitin A Kamble3a624e22009-06-08 11:34:16 -0700384{
385 return vmcs_config.cpu_based_2nd_exec_ctrl &
386 SECONDARY_EXEC_UNRESTRICTED_GUEST;
387}
388
Gui Jianfeng31299942010-03-15 17:29:09 +0800389static inline bool cpu_has_vmx_ple(void)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800390{
391 return vmcs_config.cpu_based_2nd_exec_ctrl &
392 SECONDARY_EXEC_PAUSE_LOOP_EXITING;
393}
394
Gui Jianfeng31299942010-03-15 17:29:09 +0800395static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800396{
Gui Jianfeng6d3e4352010-01-29 15:36:59 +0800397 return flexpriority_enabled && irqchip_in_kernel(kvm);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800398}
399
Gui Jianfeng31299942010-03-15 17:29:09 +0800400static inline bool cpu_has_vmx_vpid(void)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800401{
Sheng Yang04547152009-04-01 15:52:31 +0800402 return vmcs_config.cpu_based_2nd_exec_ctrl &
403 SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800404}
405
Gui Jianfeng31299942010-03-15 17:29:09 +0800406static inline bool cpu_has_vmx_rdtscp(void)
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800407{
408 return vmcs_config.cpu_based_2nd_exec_ctrl &
409 SECONDARY_EXEC_RDTSCP;
410}
411
Gui Jianfeng31299942010-03-15 17:29:09 +0800412static inline bool cpu_has_virtual_nmis(void)
Sheng Yangf08864b2008-05-15 18:23:25 +0800413{
414 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
415}
416
Sheng Yangf5f48ee2010-06-30 12:25:15 +0800417static inline bool cpu_has_vmx_wbinvd_exit(void)
418{
419 return vmcs_config.cpu_based_2nd_exec_ctrl &
420 SECONDARY_EXEC_WBINVD_EXITING;
421}
422
Sheng Yang04547152009-04-01 15:52:31 +0800423static inline bool report_flexpriority(void)
424{
425 return flexpriority_enabled;
426}
427
Rusty Russell8b9cf982007-07-30 16:31:43 +1000428static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800429{
430 int i;
431
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400432 for (i = 0; i < vmx->nmsrs; ++i)
Avi Kivity26bb0982009-09-07 11:14:12 +0300433 if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300434 return i;
435 return -1;
436}
437
Sheng Yang2384d2b2008-01-17 15:14:33 +0800438static inline void __invvpid(int ext, u16 vpid, gva_t gva)
439{
440 struct {
441 u64 vpid : 16;
442 u64 rsvd : 48;
443 u64 gva;
444 } operand = { vpid, 0, gva };
445
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300446 asm volatile (__ex(ASM_VMX_INVVPID)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800447 /* CF==1 or ZF==1 --> rc = -1 */
448 "; ja 1f ; ud2 ; 1:"
449 : : "a"(&operand), "c"(ext) : "cc", "memory");
450}
451
Sheng Yang14394422008-04-28 12:24:45 +0800452static inline void __invept(int ext, u64 eptp, gpa_t gpa)
453{
454 struct {
455 u64 eptp, gpa;
456 } operand = {eptp, gpa};
457
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300458 asm volatile (__ex(ASM_VMX_INVEPT)
Sheng Yang14394422008-04-28 12:24:45 +0800459 /* CF==1 or ZF==1 --> rc = -1 */
460 "; ja 1f ; ud2 ; 1:\n"
461 : : "a" (&operand), "c" (ext) : "cc", "memory");
462}
463
Avi Kivity26bb0982009-09-07 11:14:12 +0300464static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300465{
466 int i;
467
Rusty Russell8b9cf982007-07-30 16:31:43 +1000468 i = __find_msr_index(vmx, msr);
Eddie Donga75beee2007-05-17 18:55:15 +0300469 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400470 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000471 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800472}
473
Avi Kivity6aa8b732006-12-10 02:21:36 -0800474static void vmcs_clear(struct vmcs *vmcs)
475{
476 u64 phys_addr = __pa(vmcs);
477 u8 error;
478
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300479 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
Avi Kivity6aa8b732006-12-10 02:21:36 -0800480 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
481 : "cc", "memory");
482 if (error)
483 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
484 vmcs, phys_addr);
485}
486
Dongxiao Xu7725b892010-05-11 18:29:38 +0800487static void vmcs_load(struct vmcs *vmcs)
488{
489 u64 phys_addr = __pa(vmcs);
490 u8 error;
491
492 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
493 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
494 : "cc", "memory");
495 if (error)
496 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
497 vmcs, phys_addr);
498}
499
Avi Kivity6aa8b732006-12-10 02:21:36 -0800500static void __vcpu_clear(void *arg)
501{
Rusty Russell8b9cf982007-07-30 16:31:43 +1000502 struct vcpu_vmx *vmx = arg;
Ingo Molnard3b2c332007-01-05 16:36:23 -0800503 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800504
Rusty Russell8b9cf982007-07-30 16:31:43 +1000505 if (vmx->vcpu.cpu == cpu)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400506 vmcs_clear(vmx->vmcs);
507 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800508 per_cpu(current_vmcs, cpu) = NULL;
Avi Kivity543e4242008-05-13 16:22:47 +0300509 list_del(&vmx->local_vcpus_link);
510 vmx->vcpu.cpu = -1;
511 vmx->launched = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800512}
513
Rusty Russell8b9cf982007-07-30 16:31:43 +1000514static void vcpu_clear(struct vcpu_vmx *vmx)
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800515{
Avi Kivityeae5ecb2007-09-30 10:50:12 +0200516 if (vmx->vcpu.cpu == -1)
517 return;
Jens Axboe8691e5a2008-06-06 11:18:06 +0200518 smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800519}
520
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800521static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800522{
523 if (vmx->vpid == 0)
524 return;
525
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800526 if (cpu_has_vmx_invvpid_single())
527 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
Sheng Yang2384d2b2008-01-17 15:14:33 +0800528}
529
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800530static inline void vpid_sync_vcpu_global(void)
531{
532 if (cpu_has_vmx_invvpid_global())
533 __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
534}
535
536static inline void vpid_sync_context(struct vcpu_vmx *vmx)
537{
538 if (cpu_has_vmx_invvpid_single())
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800539 vpid_sync_vcpu_single(vmx);
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800540 else
541 vpid_sync_vcpu_global();
542}
543
Sheng Yang14394422008-04-28 12:24:45 +0800544static inline void ept_sync_global(void)
545{
546 if (cpu_has_vmx_invept_global())
547 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
548}
549
550static inline void ept_sync_context(u64 eptp)
551{
Avi Kivity089d0342009-03-23 18:26:32 +0200552 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800553 if (cpu_has_vmx_invept_context())
554 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
555 else
556 ept_sync_global();
557 }
558}
559
560static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
561{
Avi Kivity089d0342009-03-23 18:26:32 +0200562 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800563 if (cpu_has_vmx_invept_individual_addr())
564 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
565 eptp, gpa);
566 else
567 ept_sync_context(eptp);
568 }
569}
570
Avi Kivity6aa8b732006-12-10 02:21:36 -0800571static unsigned long vmcs_readl(unsigned long field)
572{
Avi Kivitya2956732010-12-02 17:55:23 +0200573 unsigned long value = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800574
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300575 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
Avi Kivitya2956732010-12-02 17:55:23 +0200576 : "+a"(value) : "d"(field) : "cc");
Avi Kivity6aa8b732006-12-10 02:21:36 -0800577 return value;
578}
579
580static u16 vmcs_read16(unsigned long field)
581{
582 return vmcs_readl(field);
583}
584
585static u32 vmcs_read32(unsigned long field)
586{
587 return vmcs_readl(field);
588}
589
590static u64 vmcs_read64(unsigned long field)
591{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800592#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800593 return vmcs_readl(field);
594#else
595 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
596#endif
597}
598
Avi Kivitye52de1b2007-01-05 16:36:56 -0800599static noinline void vmwrite_error(unsigned long field, unsigned long value)
600{
601 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
602 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
603 dump_stack();
604}
605
Avi Kivity6aa8b732006-12-10 02:21:36 -0800606static void vmcs_writel(unsigned long field, unsigned long value)
607{
608 u8 error;
609
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300610 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
Mike Dayd77c26f2007-10-08 09:02:08 -0400611 : "=q"(error) : "a"(value), "d"(field) : "cc");
Avi Kivitye52de1b2007-01-05 16:36:56 -0800612 if (unlikely(error))
613 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800614}
615
616static void vmcs_write16(unsigned long field, u16 value)
617{
618 vmcs_writel(field, value);
619}
620
621static void vmcs_write32(unsigned long field, u32 value)
622{
623 vmcs_writel(field, value);
624}
625
626static void vmcs_write64(unsigned long field, u64 value)
627{
Avi Kivity6aa8b732006-12-10 02:21:36 -0800628 vmcs_writel(field, value);
Avi Kivity7682f2d2008-05-12 19:25:43 +0300629#ifndef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800630 asm volatile ("");
631 vmcs_writel(field+1, value >> 32);
632#endif
633}
634
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300635static void vmcs_clear_bits(unsigned long field, u32 mask)
636{
637 vmcs_writel(field, vmcs_readl(field) & ~mask);
638}
639
640static void vmcs_set_bits(unsigned long field, u32 mask)
641{
642 vmcs_writel(field, vmcs_readl(field) | mask);
643}
644
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300645static void update_exception_bitmap(struct kvm_vcpu *vcpu)
646{
647 u32 eb;
648
Jan Kiszkafd7373c2010-01-20 18:20:20 +0100649 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
650 (1u << NM_VECTOR) | (1u << DB_VECTOR);
651 if ((vcpu->guest_debug &
652 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
653 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
654 eb |= 1u << BP_VECTOR;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300655 if (to_vmx(vcpu)->rmode.vm86_active)
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300656 eb = ~0;
Avi Kivity089d0342009-03-23 18:26:32 +0200657 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +0800658 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
Avi Kivity02daab22009-12-30 12:40:26 +0200659 if (vcpu->fpu_active)
660 eb &= ~(1u << NM_VECTOR);
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300661 vmcs_write32(EXCEPTION_BITMAP, eb);
662}
663
Avi Kivity61d2ef22010-04-28 16:40:38 +0300664static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
665{
666 unsigned i;
667 struct msr_autoload *m = &vmx->msr_autoload;
668
Avi Kivity110312c2010-12-21 12:54:20 +0200669 if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
670 vmcs_clear_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
671 vmcs_clear_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
672 return;
673 }
674
Avi Kivity61d2ef22010-04-28 16:40:38 +0300675 for (i = 0; i < m->nr; ++i)
676 if (m->guest[i].index == msr)
677 break;
678
679 if (i == m->nr)
680 return;
681 --m->nr;
682 m->guest[i] = m->guest[m->nr];
683 m->host[i] = m->host[m->nr];
684 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
685 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
686}
687
688static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
689 u64 guest_val, u64 host_val)
690{
691 unsigned i;
692 struct msr_autoload *m = &vmx->msr_autoload;
693
Avi Kivity110312c2010-12-21 12:54:20 +0200694 if (msr == MSR_EFER && cpu_has_load_ia32_efer) {
695 vmcs_write64(GUEST_IA32_EFER, guest_val);
696 vmcs_write64(HOST_IA32_EFER, host_val);
697 vmcs_set_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER);
698 vmcs_set_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER);
699 return;
700 }
701
Avi Kivity61d2ef22010-04-28 16:40:38 +0300702 for (i = 0; i < m->nr; ++i)
703 if (m->guest[i].index == msr)
704 break;
705
706 if (i == m->nr) {
707 ++m->nr;
708 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
709 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
710 }
711
712 m->guest[i].index = msr;
713 m->guest[i].value = guest_val;
714 m->host[i].index = msr;
715 m->host[i].value = host_val;
716}
717
Avi Kivity33ed6322007-05-02 16:54:03 +0300718static void reload_tss(void)
719{
Avi Kivity33ed6322007-05-02 16:54:03 +0300720 /*
721 * VT restores TR but not its size. Useless.
722 */
Avi Kivityd3591922010-07-26 18:32:39 +0300723 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivitya5f61302008-02-20 17:57:21 +0200724 struct desc_struct *descs;
Avi Kivity33ed6322007-05-02 16:54:03 +0300725
Avi Kivityd3591922010-07-26 18:32:39 +0300726 descs = (void *)gdt->address;
Avi Kivity33ed6322007-05-02 16:54:03 +0300727 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
728 load_TR_desc();
Avi Kivity33ed6322007-05-02 16:54:03 +0300729}
730
Avi Kivity92c0d902009-10-29 11:00:16 +0200731static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
Eddie Dong2cc51562007-05-21 07:28:09 +0300732{
Roel Kluin3a34a882009-08-04 02:08:45 -0700733 u64 guest_efer;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300734 u64 ignore_bits;
Eddie Dong2cc51562007-05-21 07:28:09 +0300735
Avi Kivityf6801df2010-01-21 15:31:50 +0200736 guest_efer = vmx->vcpu.arch.efer;
Roel Kluin3a34a882009-08-04 02:08:45 -0700737
Avi Kivity51c6cf62007-08-29 03:48:05 +0300738 /*
739 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
740 * outside long mode
741 */
742 ignore_bits = EFER_NX | EFER_SCE;
743#ifdef CONFIG_X86_64
744 ignore_bits |= EFER_LMA | EFER_LME;
745 /* SCE is meaningful only in long mode on Intel */
746 if (guest_efer & EFER_LMA)
747 ignore_bits &= ~(u64)EFER_SCE;
748#endif
Avi Kivity51c6cf62007-08-29 03:48:05 +0300749 guest_efer &= ~ignore_bits;
750 guest_efer |= host_efer & ignore_bits;
Avi Kivity26bb0982009-09-07 11:14:12 +0300751 vmx->guest_msrs[efer_offset].data = guest_efer;
Avi Kivityd5696722009-12-02 12:28:47 +0200752 vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
Avi Kivity84ad33e2010-04-28 16:42:29 +0300753
754 clear_atomic_switch_msr(vmx, MSR_EFER);
755 /* On ept, can't emulate nx, and must switch nx atomically */
756 if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) {
757 guest_efer = vmx->vcpu.arch.efer;
758 if (!(guest_efer & EFER_LMA))
759 guest_efer &= ~EFER_LME;
760 add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer);
761 return false;
762 }
763
Avi Kivity26bb0982009-09-07 11:14:12 +0300764 return true;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300765}
766
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200767static unsigned long segment_base(u16 selector)
768{
Avi Kivityd3591922010-07-26 18:32:39 +0300769 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200770 struct desc_struct *d;
771 unsigned long table_base;
772 unsigned long v;
773
774 if (!(selector & ~3))
775 return 0;
776
Avi Kivityd3591922010-07-26 18:32:39 +0300777 table_base = gdt->address;
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200778
779 if (selector & 4) { /* from ldt */
780 u16 ldt_selector = kvm_read_ldt();
781
782 if (!(ldt_selector & ~3))
783 return 0;
784
785 table_base = segment_base(ldt_selector);
786 }
787 d = (struct desc_struct *)(table_base + (selector & ~7));
788 v = get_desc_base(d);
789#ifdef CONFIG_X86_64
790 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
791 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
792#endif
793 return v;
794}
795
796static inline unsigned long kvm_read_tr_base(void)
797{
798 u16 tr;
799 asm("str %0" : "=g"(tr));
800 return segment_base(tr);
801}
802
Avi Kivity04d2cc72007-09-10 18:10:54 +0300803static void vmx_save_host_state(struct kvm_vcpu *vcpu)
Avi Kivity33ed6322007-05-02 16:54:03 +0300804{
Avi Kivity04d2cc72007-09-10 18:10:54 +0300805 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +0300806 int i;
Avi Kivity04d2cc72007-09-10 18:10:54 +0300807
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400808 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300809 return;
810
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400811 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300812 /*
813 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
814 * allow segment selectors with cpl > 0 or ti == 1.
815 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300816 vmx->host_state.ldt_sel = kvm_read_ldt();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200817 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
Avi Kivity9581d442010-10-19 16:46:55 +0200818 savesegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200819 if (!(vmx->host_state.fs_sel & 7)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400820 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200821 vmx->host_state.fs_reload_needed = 0;
822 } else {
Avi Kivity33ed6322007-05-02 16:54:03 +0300823 vmcs_write16(HOST_FS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200824 vmx->host_state.fs_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300825 }
Avi Kivity9581d442010-10-19 16:46:55 +0200826 savesegment(gs, vmx->host_state.gs_sel);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400827 if (!(vmx->host_state.gs_sel & 7))
828 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300829 else {
830 vmcs_write16(HOST_GS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200831 vmx->host_state.gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300832 }
833
834#ifdef CONFIG_X86_64
835 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
836 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
837#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400838 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
839 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +0300840#endif
Avi Kivity707c0872007-05-02 17:33:43 +0300841
842#ifdef CONFIG_X86_64
Avi Kivityc8770e72010-11-11 12:37:26 +0200843 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
844 if (is_long_mode(&vmx->vcpu))
Avi Kivity44ea2b12009-09-06 15:55:37 +0300845 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
Avi Kivity707c0872007-05-02 17:33:43 +0300846#endif
Avi Kivity26bb0982009-09-07 11:14:12 +0300847 for (i = 0; i < vmx->save_nmsrs; ++i)
848 kvm_set_shared_msr(vmx->guest_msrs[i].index,
Avi Kivityd5696722009-12-02 12:28:47 +0200849 vmx->guest_msrs[i].data,
850 vmx->guest_msrs[i].mask);
Avi Kivity33ed6322007-05-02 16:54:03 +0300851}
852
Avi Kivitya9b21b62008-06-24 11:48:49 +0300853static void __vmx_load_host_state(struct vcpu_vmx *vmx)
Avi Kivity33ed6322007-05-02 16:54:03 +0300854{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400855 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300856 return;
857
Avi Kivitye1beb1d2007-11-18 13:50:24 +0200858 ++vmx->vcpu.stat.host_state_reload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400859 vmx->host_state.loaded = 0;
Avi Kivityc8770e72010-11-11 12:37:26 +0200860#ifdef CONFIG_X86_64
861 if (is_long_mode(&vmx->vcpu))
862 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
863#endif
Laurent Vivier152d3f22007-08-23 16:33:11 +0200864 if (vmx->host_state.gs_ldt_reload_needed) {
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300865 kvm_load_ldt(vmx->host_state.ldt_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300866#ifdef CONFIG_X86_64
Avi Kivity9581d442010-10-19 16:46:55 +0200867 load_gs_index(vmx->host_state.gs_sel);
Avi Kivity9581d442010-10-19 16:46:55 +0200868#else
869 loadsegment(gs, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300870#endif
Avi Kivity33ed6322007-05-02 16:54:03 +0300871 }
Avi Kivity0a77fe42010-10-19 18:48:35 +0200872 if (vmx->host_state.fs_reload_needed)
873 loadsegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200874 reload_tss();
Avi Kivity44ea2b12009-09-06 15:55:37 +0300875#ifdef CONFIG_X86_64
Avi Kivityc8770e72010-11-11 12:37:26 +0200876 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
Avi Kivity44ea2b12009-09-06 15:55:37 +0300877#endif
Avi Kivity1c11e712010-05-03 16:05:44 +0300878 if (current_thread_info()->status & TS_USEDFPU)
879 clts();
Avi Kivity3444d7d2010-07-26 18:32:38 +0300880 load_gdt(&__get_cpu_var(host_gdt));
Avi Kivity33ed6322007-05-02 16:54:03 +0300881}
882
Avi Kivitya9b21b62008-06-24 11:48:49 +0300883static void vmx_load_host_state(struct vcpu_vmx *vmx)
884{
885 preempt_disable();
886 __vmx_load_host_state(vmx);
887 preempt_enable();
888}
889
Avi Kivity6aa8b732006-12-10 02:21:36 -0800890/*
891 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
892 * vcpu mutex is already taken.
893 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300894static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800895{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400896 struct vcpu_vmx *vmx = to_vmx(vcpu);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800897 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800898
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800899 if (!vmm_exclusive)
900 kvm_cpu_vmxon(phys_addr);
901 else if (vcpu->cpu != cpu)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000902 vcpu_clear(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800903
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400904 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400905 per_cpu(current_vmcs, cpu) = vmx->vmcs;
Dongxiao Xu7725b892010-05-11 18:29:38 +0800906 vmcs_load(vmx->vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800907 }
908
909 if (vcpu->cpu != cpu) {
Avi Kivityd3591922010-07-26 18:32:39 +0300910 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800911 unsigned long sysenter_esp;
912
Avi Kivitya8eeb042010-05-10 12:34:53 +0300913 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
Dongxiao Xu92fe13b2010-05-11 18:29:42 +0800914 local_irq_disable();
915 list_add(&vmx->local_vcpus_link,
916 &per_cpu(vcpus_on_cpu, cpu));
917 local_irq_enable();
918
Avi Kivity6aa8b732006-12-10 02:21:36 -0800919 /*
920 * Linux uses per-cpu TSS and GDT, so set these when switching
921 * processors.
922 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300923 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
Avi Kivityd3591922010-07-26 18:32:39 +0300924 vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800925
926 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
927 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
928 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800929}
930
931static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
932{
Avi Kivitya9b21b62008-06-24 11:48:49 +0300933 __vmx_load_host_state(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800934 if (!vmm_exclusive) {
Dongxiao Xub923e622010-05-11 18:29:45 +0800935 __vcpu_clear(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800936 kvm_cpu_vmxoff();
937 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800938}
939
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300940static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
941{
Avi Kivity81231c62010-01-24 16:26:40 +0200942 ulong cr0;
943
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300944 if (vcpu->fpu_active)
945 return;
946 vcpu->fpu_active = 1;
Avi Kivity81231c62010-01-24 16:26:40 +0200947 cr0 = vmcs_readl(GUEST_CR0);
948 cr0 &= ~(X86_CR0_TS | X86_CR0_MP);
949 cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP);
950 vmcs_writel(GUEST_CR0, cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300951 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200952 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
953 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300954}
955
Avi Kivityedcafe32009-12-30 18:07:40 +0200956static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
957
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300958static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
959{
Avi Kivityedcafe32009-12-30 18:07:40 +0200960 vmx_decache_cr0_guest_bits(vcpu);
Avi Kivity81231c62010-01-24 16:26:40 +0200961 vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300962 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200963 vcpu->arch.cr0_guest_owned_bits = 0;
964 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
965 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300966}
967
Avi Kivity6aa8b732006-12-10 02:21:36 -0800968static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
969{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300970 unsigned long rflags, save_rflags;
Avi Kivity345dcaa2009-08-12 15:29:37 +0300971
972 rflags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +0300973 if (to_vmx(vcpu)->rmode.vm86_active) {
974 rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
975 save_rflags = to_vmx(vcpu)->rmode.save_rflags;
976 rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
977 }
Avi Kivity345dcaa2009-08-12 15:29:37 +0300978 return rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800979}
980
981static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
982{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300983 if (to_vmx(vcpu)->rmode.vm86_active) {
984 to_vmx(vcpu)->rmode.save_rflags = rflags;
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +0100985 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300986 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800987 vmcs_writel(GUEST_RFLAGS, rflags);
988}
989
Glauber Costa2809f5d2009-05-12 16:21:05 -0400990static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
991{
992 u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
993 int ret = 0;
994
995 if (interruptibility & GUEST_INTR_STATE_STI)
Jan Kiszka48005f62010-02-19 19:38:07 +0100996 ret |= KVM_X86_SHADOW_INT_STI;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400997 if (interruptibility & GUEST_INTR_STATE_MOV_SS)
Jan Kiszka48005f62010-02-19 19:38:07 +0100998 ret |= KVM_X86_SHADOW_INT_MOV_SS;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400999
1000 return ret & mask;
1001}
1002
1003static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
1004{
1005 u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1006 u32 interruptibility = interruptibility_old;
1007
1008 interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
1009
Jan Kiszka48005f62010-02-19 19:38:07 +01001010 if (mask & KVM_X86_SHADOW_INT_MOV_SS)
Glauber Costa2809f5d2009-05-12 16:21:05 -04001011 interruptibility |= GUEST_INTR_STATE_MOV_SS;
Jan Kiszka48005f62010-02-19 19:38:07 +01001012 else if (mask & KVM_X86_SHADOW_INT_STI)
Glauber Costa2809f5d2009-05-12 16:21:05 -04001013 interruptibility |= GUEST_INTR_STATE_STI;
1014
1015 if ((interruptibility != interruptibility_old))
1016 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
1017}
1018
Avi Kivity6aa8b732006-12-10 02:21:36 -08001019static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
1020{
1021 unsigned long rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001022
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001023 rip = kvm_rip_read(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001024 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001025 kvm_rip_write(vcpu, rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001026
Glauber Costa2809f5d2009-05-12 16:21:05 -04001027 /* skipping an emulated instruction also counts */
1028 vmx_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001029}
1030
Anthony Liguori443381a2010-12-06 10:53:38 -06001031static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
1032{
1033 /* Ensure that we clear the HLT state in the VMCS. We don't need to
1034 * explicitly skip the instruction because if the HLT state is set, then
1035 * the instruction is already executing and RIP has already been
1036 * advanced. */
1037 if (!yield_on_hlt &&
1038 vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT)
1039 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
1040}
1041
Avi Kivity298101d2007-11-25 13:41:11 +02001042static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
Joerg Roedelce7ddec2010-04-22 12:33:13 +02001043 bool has_error_code, u32 error_code,
1044 bool reinject)
Avi Kivity298101d2007-11-25 13:41:11 +02001045{
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001046 struct vcpu_vmx *vmx = to_vmx(vcpu);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001047 u32 intr_info = nr | INTR_INFO_VALID_MASK;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001048
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001049 if (has_error_code) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001050 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001051 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
1052 }
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001053
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001054 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02001055 if (kvm_inject_realmode_interrupt(vcpu, nr) != EMULATE_DONE)
1056 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001057 return;
1058 }
1059
Gleb Natapov66fd3f72009-05-11 13:35:50 +03001060 if (kvm_exception_is_soft(nr)) {
1061 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
1062 vmx->vcpu.arch.event_exit_inst_len);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001063 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
1064 } else
1065 intr_info |= INTR_TYPE_HARD_EXCEPTION;
1066
1067 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
Anthony Liguori443381a2010-12-06 10:53:38 -06001068 vmx_clear_hlt(vcpu);
Avi Kivity298101d2007-11-25 13:41:11 +02001069}
1070
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001071static bool vmx_rdtscp_supported(void)
1072{
1073 return cpu_has_vmx_rdtscp();
1074}
1075
Avi Kivity6aa8b732006-12-10 02:21:36 -08001076/*
Eddie Donga75beee2007-05-17 18:55:15 +03001077 * Swap MSR entry in host/guest MSR entry array.
1078 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001079static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
Eddie Donga75beee2007-05-17 18:55:15 +03001080{
Avi Kivity26bb0982009-09-07 11:14:12 +03001081 struct shared_msr_entry tmp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001082
1083 tmp = vmx->guest_msrs[to];
1084 vmx->guest_msrs[to] = vmx->guest_msrs[from];
1085 vmx->guest_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +03001086}
1087
1088/*
Avi Kivitye38aea32007-04-19 13:22:48 +03001089 * Set up the vmcs to automatically save and restore system
1090 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
1091 * mode, as fiddling with msrs is very expensive.
1092 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001093static void setup_msrs(struct vcpu_vmx *vmx)
Avi Kivitye38aea32007-04-19 13:22:48 +03001094{
Avi Kivity26bb0982009-09-07 11:14:12 +03001095 int save_nmsrs, index;
Avi Kivity58972972009-02-24 22:26:47 +02001096 unsigned long *msr_bitmap;
Avi Kivitye38aea32007-04-19 13:22:48 +03001097
Avi Kivity33f9c502008-02-27 16:06:57 +02001098 vmx_load_host_state(vmx);
Eddie Donga75beee2007-05-17 18:55:15 +03001099 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001100#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +10001101 if (is_long_mode(&vmx->vcpu)) {
Rusty Russell8b9cf982007-07-30 16:31:43 +10001102 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
Eddie Donga75beee2007-05-17 18:55:15 +03001103 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001104 move_msr_up(vmx, index, save_nmsrs++);
1105 index = __find_msr_index(vmx, MSR_LSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001106 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001107 move_msr_up(vmx, index, save_nmsrs++);
1108 index = __find_msr_index(vmx, MSR_CSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001109 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001110 move_msr_up(vmx, index, save_nmsrs++);
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001111 index = __find_msr_index(vmx, MSR_TSC_AUX);
1112 if (index >= 0 && vmx->rdtscp_enabled)
1113 move_msr_up(vmx, index, save_nmsrs++);
Eddie Donga75beee2007-05-17 18:55:15 +03001114 /*
Brian Gerst8c065852010-07-17 09:03:26 -04001115 * MSR_STAR is only needed on long mode guests, and only
Eddie Donga75beee2007-05-17 18:55:15 +03001116 * if efer.sce is enabled.
1117 */
Brian Gerst8c065852010-07-17 09:03:26 -04001118 index = __find_msr_index(vmx, MSR_STAR);
Avi Kivityf6801df2010-01-21 15:31:50 +02001119 if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE))
Rusty Russell8b9cf982007-07-30 16:31:43 +10001120 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001121 }
Eddie Donga75beee2007-05-17 18:55:15 +03001122#endif
Avi Kivity92c0d902009-10-29 11:00:16 +02001123 index = __find_msr_index(vmx, MSR_EFER);
1124 if (index >= 0 && update_transition_efer(vmx, index))
Avi Kivity26bb0982009-09-07 11:14:12 +03001125 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001126
Avi Kivity26bb0982009-09-07 11:14:12 +03001127 vmx->save_nmsrs = save_nmsrs;
Avi Kivity58972972009-02-24 22:26:47 +02001128
1129 if (cpu_has_vmx_msr_bitmap()) {
1130 if (is_long_mode(&vmx->vcpu))
1131 msr_bitmap = vmx_msr_bitmap_longmode;
1132 else
1133 msr_bitmap = vmx_msr_bitmap_legacy;
1134
1135 vmcs_write64(MSR_BITMAP, __pa(msr_bitmap));
1136 }
Avi Kivitye38aea32007-04-19 13:22:48 +03001137}
1138
1139/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08001140 * reads and returns guest's timestamp counter "register"
1141 * guest_tsc = host_tsc + tsc_offset -- 21.3
1142 */
1143static u64 guest_read_tsc(void)
1144{
1145 u64 host_tsc, tsc_offset;
1146
1147 rdtscll(host_tsc);
1148 tsc_offset = vmcs_read64(TSC_OFFSET);
1149 return host_tsc + tsc_offset;
1150}
1151
1152/*
Zachary Amsden99e3e302010-08-19 22:07:17 -10001153 * writes 'offset' into guest's timestamp counter offset register
Avi Kivity6aa8b732006-12-10 02:21:36 -08001154 */
Zachary Amsden99e3e302010-08-19 22:07:17 -10001155static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001156{
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001157 vmcs_write64(TSC_OFFSET, offset);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001158}
1159
Zachary Amsdene48672f2010-08-19 22:07:23 -10001160static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
1161{
1162 u64 offset = vmcs_read64(TSC_OFFSET);
1163 vmcs_write64(TSC_OFFSET, offset + adjustment);
1164}
1165
Avi Kivity6aa8b732006-12-10 02:21:36 -08001166/*
1167 * Reads an msr value (of 'msr_index') into 'pdata'.
1168 * Returns 0 on success, non-0 otherwise.
1169 * Assumes vcpu_load() was already called.
1170 */
1171static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1172{
1173 u64 data;
Avi Kivity26bb0982009-09-07 11:14:12 +03001174 struct shared_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001175
1176 if (!pdata) {
1177 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
1178 return -EINVAL;
1179 }
1180
1181 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001182#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001183 case MSR_FS_BASE:
1184 data = vmcs_readl(GUEST_FS_BASE);
1185 break;
1186 case MSR_GS_BASE:
1187 data = vmcs_readl(GUEST_GS_BASE);
1188 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001189 case MSR_KERNEL_GS_BASE:
1190 vmx_load_host_state(to_vmx(vcpu));
1191 data = to_vmx(vcpu)->msr_guest_kernel_gs_base;
1192 break;
Avi Kivity26bb0982009-09-07 11:14:12 +03001193#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001194 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -08001195 return kvm_get_msr_common(vcpu, msr_index, pdata);
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301196 case MSR_IA32_TSC:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001197 data = guest_read_tsc();
1198 break;
1199 case MSR_IA32_SYSENTER_CS:
1200 data = vmcs_read32(GUEST_SYSENTER_CS);
1201 break;
1202 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001203 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001204 break;
1205 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001206 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001207 break;
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001208 case MSR_TSC_AUX:
1209 if (!to_vmx(vcpu)->rdtscp_enabled)
1210 return 1;
1211 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001212 default:
Avi Kivity26bb0982009-09-07 11:14:12 +03001213 vmx_load_host_state(to_vmx(vcpu));
Rusty Russell8b9cf982007-07-30 16:31:43 +10001214 msr = find_msr_entry(to_vmx(vcpu), msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001215 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001216 vmx_load_host_state(to_vmx(vcpu));
Avi Kivity3bab1f52006-12-29 16:49:48 -08001217 data = msr->data;
1218 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001219 }
Avi Kivity3bab1f52006-12-29 16:49:48 -08001220 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001221 }
1222
1223 *pdata = data;
1224 return 0;
1225}
1226
1227/*
1228 * Writes msr value into into the appropriate "register".
1229 * Returns 0 on success, non-0 otherwise.
1230 * Assumes vcpu_load() was already called.
1231 */
1232static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1233{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001234 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001235 struct shared_msr_entry *msr;
Eddie Dong2cc51562007-05-21 07:28:09 +03001236 int ret = 0;
1237
Avi Kivity6aa8b732006-12-10 02:21:36 -08001238 switch (msr_index) {
Avi Kivity3bab1f52006-12-29 16:49:48 -08001239 case MSR_EFER:
Avi Kivitya9b21b62008-06-24 11:48:49 +03001240 vmx_load_host_state(vmx);
Eddie Dong2cc51562007-05-21 07:28:09 +03001241 ret = kvm_set_msr_common(vcpu, msr_index, data);
Eddie Dong2cc51562007-05-21 07:28:09 +03001242 break;
Avi Kivity16175a72009-03-23 22:13:44 +02001243#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001244 case MSR_FS_BASE:
1245 vmcs_writel(GUEST_FS_BASE, data);
1246 break;
1247 case MSR_GS_BASE:
1248 vmcs_writel(GUEST_GS_BASE, data);
1249 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001250 case MSR_KERNEL_GS_BASE:
1251 vmx_load_host_state(vmx);
1252 vmx->msr_guest_kernel_gs_base = data;
1253 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001254#endif
1255 case MSR_IA32_SYSENTER_CS:
1256 vmcs_write32(GUEST_SYSENTER_CS, data);
1257 break;
1258 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001259 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001260 break;
1261 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001262 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001263 break;
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301264 case MSR_IA32_TSC:
Zachary Amsden99e3e302010-08-19 22:07:17 -10001265 kvm_write_tsc(vcpu, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001266 break;
Sheng Yang468d4722008-10-09 16:01:55 +08001267 case MSR_IA32_CR_PAT:
1268 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
1269 vmcs_write64(GUEST_IA32_PAT, data);
1270 vcpu->arch.pat = data;
1271 break;
1272 }
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001273 ret = kvm_set_msr_common(vcpu, msr_index, data);
1274 break;
1275 case MSR_TSC_AUX:
1276 if (!vmx->rdtscp_enabled)
1277 return 1;
1278 /* Check reserved bit, higher 32 bits should be zero */
1279 if ((data >> 32) != 0)
1280 return 1;
1281 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001282 default:
Rusty Russell8b9cf982007-07-30 16:31:43 +10001283 msr = find_msr_entry(vmx, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001284 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001285 vmx_load_host_state(vmx);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001286 msr->data = data;
1287 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001288 }
Eddie Dong2cc51562007-05-21 07:28:09 +03001289 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001290 }
1291
Eddie Dong2cc51562007-05-21 07:28:09 +03001292 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001293}
1294
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001295static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001296{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001297 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
1298 switch (reg) {
1299 case VCPU_REGS_RSP:
1300 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
1301 break;
1302 case VCPU_REGS_RIP:
1303 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
1304 break;
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001305 case VCPU_EXREG_PDPTR:
1306 if (enable_ept)
1307 ept_save_pdptrs(vcpu);
1308 break;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001309 default:
1310 break;
1311 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001312}
1313
Jan Kiszka355be0b2009-10-03 00:31:21 +02001314static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001315{
Jan Kiszkaae675ef2008-12-15 13:52:10 +01001316 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1317 vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]);
1318 else
1319 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
1320
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001321 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001322}
1323
1324static __init int cpu_has_kvm_support(void)
1325{
Eduardo Habkost6210e372008-11-17 19:03:16 -02001326 return cpu_has_vmx();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001327}
1328
1329static __init int vmx_disabled_by_bios(void)
1330{
1331 u64 msr;
1332
1333 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Shane Wangcafd6652010-04-29 12:09:01 -04001334 if (msr & FEATURE_CONTROL_LOCKED) {
1335 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
1336 && tboot_enabled())
1337 return 1;
1338 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
Shane Wangf9335af2010-11-17 11:40:17 +08001339 && !tboot_enabled()) {
1340 printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
1341 " activate TXT before enabling KVM\n");
Shane Wangcafd6652010-04-29 12:09:01 -04001342 return 1;
Shane Wangf9335af2010-11-17 11:40:17 +08001343 }
Shane Wangcafd6652010-04-29 12:09:01 -04001344 }
1345
1346 return 0;
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001347 /* locked but not enabled */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001348}
1349
Dongxiao Xu7725b892010-05-11 18:29:38 +08001350static void kvm_cpu_vmxon(u64 addr)
1351{
1352 asm volatile (ASM_VMX_VMXON_RAX
1353 : : "a"(&addr), "m"(addr)
1354 : "memory", "cc");
1355}
1356
Alexander Graf10474ae2009-09-15 11:37:46 +02001357static int hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001358{
1359 int cpu = raw_smp_processor_id();
1360 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Shane Wangcafd6652010-04-29 12:09:01 -04001361 u64 old, test_bits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001362
Alexander Graf10474ae2009-09-15 11:37:46 +02001363 if (read_cr4() & X86_CR4_VMXE)
1364 return -EBUSY;
1365
Avi Kivity543e4242008-05-13 16:22:47 +03001366 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001367 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Shane Wangcafd6652010-04-29 12:09:01 -04001368
1369 test_bits = FEATURE_CONTROL_LOCKED;
1370 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
1371 if (tboot_enabled())
1372 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX;
1373
1374 if ((old & test_bits) != test_bits) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001375 /* enable and lock */
Shane Wangcafd6652010-04-29 12:09:01 -04001376 wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits);
1377 }
Rusty Russell66aee912007-07-17 23:34:16 +10001378 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Alexander Graf10474ae2009-09-15 11:37:46 +02001379
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001380 if (vmm_exclusive) {
1381 kvm_cpu_vmxon(phys_addr);
1382 ept_sync_global();
1383 }
Alexander Graf10474ae2009-09-15 11:37:46 +02001384
Avi Kivity3444d7d2010-07-26 18:32:38 +03001385 store_gdt(&__get_cpu_var(host_gdt));
1386
Alexander Graf10474ae2009-09-15 11:37:46 +02001387 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001388}
1389
Avi Kivity543e4242008-05-13 16:22:47 +03001390static void vmclear_local_vcpus(void)
1391{
1392 int cpu = raw_smp_processor_id();
1393 struct vcpu_vmx *vmx, *n;
1394
1395 list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
1396 local_vcpus_link)
1397 __vcpu_clear(vmx);
1398}
1399
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001400
1401/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
1402 * tricks.
1403 */
1404static void kvm_cpu_vmxoff(void)
1405{
1406 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001407}
1408
Avi Kivity6aa8b732006-12-10 02:21:36 -08001409static void hardware_disable(void *garbage)
1410{
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001411 if (vmm_exclusive) {
1412 vmclear_local_vcpus();
1413 kvm_cpu_vmxoff();
1414 }
Dongxiao Xu7725b892010-05-11 18:29:38 +08001415 write_cr4(read_cr4() & ~X86_CR4_VMXE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001416}
1417
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001418static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
Mike Dayd77c26f2007-10-08 09:02:08 -04001419 u32 msr, u32 *result)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001420{
1421 u32 vmx_msr_low, vmx_msr_high;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001422 u32 ctl = ctl_min | ctl_opt;
1423
1424 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1425
1426 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
1427 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
1428
1429 /* Ensure minimum (required) set of control bits are supported. */
1430 if (ctl_min & ~ctl)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001431 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001432
1433 *result = ctl;
1434 return 0;
1435}
1436
Avi Kivity110312c2010-12-21 12:54:20 +02001437static __init bool allow_1_setting(u32 msr, u32 ctl)
1438{
1439 u32 vmx_msr_low, vmx_msr_high;
1440
1441 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1442 return vmx_msr_high & ctl;
1443}
1444
Yang, Sheng002c7f72007-07-31 14:23:01 +03001445static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001446{
1447 u32 vmx_msr_low, vmx_msr_high;
Sheng Yangd56f5462008-04-25 10:13:16 +08001448 u32 min, opt, min2, opt2;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001449 u32 _pin_based_exec_control = 0;
1450 u32 _cpu_based_exec_control = 0;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001451 u32 _cpu_based_2nd_exec_control = 0;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001452 u32 _vmexit_control = 0;
1453 u32 _vmentry_control = 0;
1454
1455 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
Sheng Yangf08864b2008-05-15 18:23:25 +08001456 opt = PIN_BASED_VIRTUAL_NMIS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001457 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
1458 &_pin_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001459 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001460
Anthony Liguori443381a2010-12-06 10:53:38 -06001461 min =
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001462#ifdef CONFIG_X86_64
1463 CPU_BASED_CR8_LOAD_EXITING |
1464 CPU_BASED_CR8_STORE_EXITING |
1465#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001466 CPU_BASED_CR3_LOAD_EXITING |
1467 CPU_BASED_CR3_STORE_EXITING |
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001468 CPU_BASED_USE_IO_BITMAPS |
1469 CPU_BASED_MOV_DR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001470 CPU_BASED_USE_TSC_OFFSETING |
Sheng Yang59708672009-12-15 13:29:54 +08001471 CPU_BASED_MWAIT_EXITING |
1472 CPU_BASED_MONITOR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001473 CPU_BASED_INVLPG_EXITING;
Anthony Liguori443381a2010-12-06 10:53:38 -06001474
1475 if (yield_on_hlt)
1476 min |= CPU_BASED_HLT_EXITING;
1477
Sheng Yangf78e0e22007-10-29 09:40:42 +08001478 opt = CPU_BASED_TPR_SHADOW |
Sheng Yang25c5f222008-03-28 13:18:56 +08001479 CPU_BASED_USE_MSR_BITMAPS |
Sheng Yangf78e0e22007-10-29 09:40:42 +08001480 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001481 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1482 &_cpu_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001483 return -EIO;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001484#ifdef CONFIG_X86_64
1485 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
1486 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
1487 ~CPU_BASED_CR8_STORE_EXITING;
1488#endif
Sheng Yangf78e0e22007-10-29 09:40:42 +08001489 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
Sheng Yangd56f5462008-04-25 10:13:16 +08001490 min2 = 0;
1491 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
Sheng Yang2384d2b2008-01-17 15:14:33 +08001492 SECONDARY_EXEC_WBINVD_EXITING |
Sheng Yangd56f5462008-04-25 10:13:16 +08001493 SECONDARY_EXEC_ENABLE_VPID |
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001494 SECONDARY_EXEC_ENABLE_EPT |
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001495 SECONDARY_EXEC_UNRESTRICTED_GUEST |
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001496 SECONDARY_EXEC_PAUSE_LOOP_EXITING |
1497 SECONDARY_EXEC_RDTSCP;
Sheng Yangd56f5462008-04-25 10:13:16 +08001498 if (adjust_vmx_controls(min2, opt2,
1499 MSR_IA32_VMX_PROCBASED_CTLS2,
Sheng Yangf78e0e22007-10-29 09:40:42 +08001500 &_cpu_based_2nd_exec_control) < 0)
1501 return -EIO;
1502 }
1503#ifndef CONFIG_X86_64
1504 if (!(_cpu_based_2nd_exec_control &
1505 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
1506 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
1507#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001508 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
Marcelo Tosattia7052892008-09-23 13:18:35 -03001509 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
1510 enabled */
Gleb Natapov5fff7d22009-08-27 18:41:30 +03001511 _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING |
1512 CPU_BASED_CR3_STORE_EXITING |
1513 CPU_BASED_INVLPG_EXITING);
Sheng Yangd56f5462008-04-25 10:13:16 +08001514 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
1515 vmx_capability.ept, vmx_capability.vpid);
1516 }
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001517
1518 min = 0;
1519#ifdef CONFIG_X86_64
1520 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
1521#endif
Sheng Yang468d4722008-10-09 16:01:55 +08001522 opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001523 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
1524 &_vmexit_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001525 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001526
Sheng Yang468d4722008-10-09 16:01:55 +08001527 min = 0;
1528 opt = VM_ENTRY_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001529 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
1530 &_vmentry_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001531 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001532
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001533 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001534
1535 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1536 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001537 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001538
1539#ifdef CONFIG_X86_64
1540 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1541 if (vmx_msr_high & (1u<<16))
Yang, Sheng002c7f72007-07-31 14:23:01 +03001542 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001543#endif
1544
1545 /* Require Write-Back (WB) memory type for VMCS accesses. */
1546 if (((vmx_msr_high >> 18) & 15) != 6)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001547 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001548
Yang, Sheng002c7f72007-07-31 14:23:01 +03001549 vmcs_conf->size = vmx_msr_high & 0x1fff;
1550 vmcs_conf->order = get_order(vmcs_config.size);
1551 vmcs_conf->revision_id = vmx_msr_low;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001552
Yang, Sheng002c7f72007-07-31 14:23:01 +03001553 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
1554 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001555 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001556 vmcs_conf->vmexit_ctrl = _vmexit_control;
1557 vmcs_conf->vmentry_ctrl = _vmentry_control;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001558
Avi Kivity110312c2010-12-21 12:54:20 +02001559 cpu_has_load_ia32_efer =
1560 allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
1561 VM_ENTRY_LOAD_IA32_EFER)
1562 && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS,
1563 VM_EXIT_LOAD_IA32_EFER);
1564
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001565 return 0;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001566}
Avi Kivity6aa8b732006-12-10 02:21:36 -08001567
1568static struct vmcs *alloc_vmcs_cpu(int cpu)
1569{
1570 int node = cpu_to_node(cpu);
1571 struct page *pages;
1572 struct vmcs *vmcs;
1573
Mel Gorman6484eb32009-06-16 15:31:54 -07001574 pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001575 if (!pages)
1576 return NULL;
1577 vmcs = page_address(pages);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001578 memset(vmcs, 0, vmcs_config.size);
1579 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001580 return vmcs;
1581}
1582
1583static struct vmcs *alloc_vmcs(void)
1584{
Ingo Molnard3b2c332007-01-05 16:36:23 -08001585 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -08001586}
1587
1588static void free_vmcs(struct vmcs *vmcs)
1589{
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001590 free_pages((unsigned long)vmcs, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001591}
1592
Sam Ravnborg39959582007-06-01 00:47:13 -07001593static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001594{
1595 int cpu;
1596
Zachary Amsden3230bb42009-09-29 11:38:37 -10001597 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001598 free_vmcs(per_cpu(vmxarea, cpu));
Zachary Amsden3230bb42009-09-29 11:38:37 -10001599 per_cpu(vmxarea, cpu) = NULL;
1600 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001601}
1602
Avi Kivity6aa8b732006-12-10 02:21:36 -08001603static __init int alloc_kvm_area(void)
1604{
1605 int cpu;
1606
Zachary Amsden3230bb42009-09-29 11:38:37 -10001607 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001608 struct vmcs *vmcs;
1609
1610 vmcs = alloc_vmcs_cpu(cpu);
1611 if (!vmcs) {
1612 free_kvm_area();
1613 return -ENOMEM;
1614 }
1615
1616 per_cpu(vmxarea, cpu) = vmcs;
1617 }
1618 return 0;
1619}
1620
1621static __init int hardware_setup(void)
1622{
Yang, Sheng002c7f72007-07-31 14:23:01 +03001623 if (setup_vmcs_config(&vmcs_config) < 0)
1624 return -EIO;
Joerg Roedel50a37eb2008-01-31 14:57:38 +01001625
1626 if (boot_cpu_has(X86_FEATURE_NX))
1627 kvm_enable_efer_bits(EFER_NX);
1628
Sheng Yang93ba03c2009-04-01 15:52:32 +08001629 if (!cpu_has_vmx_vpid())
1630 enable_vpid = 0;
1631
Sheng Yang4bc9b982010-06-02 14:05:24 +08001632 if (!cpu_has_vmx_ept() ||
1633 !cpu_has_vmx_ept_4levels()) {
Sheng Yang93ba03c2009-04-01 15:52:32 +08001634 enable_ept = 0;
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001635 enable_unrestricted_guest = 0;
1636 }
1637
1638 if (!cpu_has_vmx_unrestricted_guest())
1639 enable_unrestricted_guest = 0;
Sheng Yang93ba03c2009-04-01 15:52:32 +08001640
1641 if (!cpu_has_vmx_flexpriority())
1642 flexpriority_enabled = 0;
1643
Gleb Natapov95ba8273132009-04-21 17:45:08 +03001644 if (!cpu_has_vmx_tpr_shadow())
1645 kvm_x86_ops->update_cr8_intercept = NULL;
1646
Marcelo Tosatti54dee992009-06-11 12:07:44 -03001647 if (enable_ept && !cpu_has_vmx_ept_2m_page())
1648 kvm_disable_largepages();
1649
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001650 if (!cpu_has_vmx_ple())
1651 ple_gap = 0;
1652
Avi Kivity6aa8b732006-12-10 02:21:36 -08001653 return alloc_kvm_area();
1654}
1655
1656static __exit void hardware_unsetup(void)
1657{
1658 free_kvm_area();
1659}
1660
Avi Kivity6aa8b732006-12-10 02:21:36 -08001661static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
1662{
1663 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1664
Avi Kivity6af11b92007-03-19 13:18:10 +02001665 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001666 vmcs_write16(sf->selector, save->selector);
1667 vmcs_writel(sf->base, save->base);
1668 vmcs_write32(sf->limit, save->limit);
1669 vmcs_write32(sf->ar_bytes, save->ar);
1670 } else {
1671 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
1672 << AR_DPL_SHIFT;
1673 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
1674 }
1675}
1676
1677static void enter_pmode(struct kvm_vcpu *vcpu)
1678{
1679 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001680 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001681
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001682 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001683 vmx->rmode.vm86_active = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001684
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001685 vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base);
1686 vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit);
1687 vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001688
1689 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001690 flags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
1691 flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001692 vmcs_writel(GUEST_RFLAGS, flags);
1693
Rusty Russell66aee912007-07-17 23:34:16 +10001694 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
1695 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001696
1697 update_exception_bitmap(vcpu);
1698
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001699 if (emulate_invalid_guest_state)
1700 return;
1701
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001702 fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es);
1703 fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds);
1704 fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs);
1705 fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001706
1707 vmcs_write16(GUEST_SS_SELECTOR, 0);
1708 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
1709
1710 vmcs_write16(GUEST_CS_SELECTOR,
1711 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
1712 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1713}
1714
Mike Dayd77c26f2007-10-08 09:02:08 -04001715static gva_t rmode_tss_base(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001716{
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001717 if (!kvm->arch.tss_addr) {
Marcelo Tosattibc6678a2009-12-23 14:35:21 -02001718 struct kvm_memslots *slots;
1719 gfn_t base_gfn;
1720
Lai Jiangshan90d83dc2010-04-19 17:41:23 +08001721 slots = kvm_memslots(kvm);
Avi Kivityf495c6e2010-06-10 17:21:29 +03001722 base_gfn = slots->memslots[0].base_gfn +
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -02001723 kvm->memslots->memslots[0].npages - 3;
Izik Eiduscbc94022007-10-25 00:29:55 +02001724 return base_gfn << PAGE_SHIFT;
1725 }
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001726 return kvm->arch.tss_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001727}
1728
1729static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
1730{
1731 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1732
1733 save->selector = vmcs_read16(sf->selector);
1734 save->base = vmcs_readl(sf->base);
1735 save->limit = vmcs_read32(sf->limit);
1736 save->ar = vmcs_read32(sf->ar_bytes);
Jan Kiszka15b00f32007-11-19 10:21:45 +01001737 vmcs_write16(sf->selector, save->base >> 4);
1738 vmcs_write32(sf->base, save->base & 0xfffff);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001739 vmcs_write32(sf->limit, 0xffff);
1740 vmcs_write32(sf->ar_bytes, 0xf3);
1741}
1742
1743static void enter_rmode(struct kvm_vcpu *vcpu)
1744{
1745 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001746 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001747
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001748 if (enable_unrestricted_guest)
1749 return;
1750
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001751 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001752 vmx->rmode.vm86_active = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001753
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001754 vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001755 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
1756
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001757 vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001758 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
1759
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001760 vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001761 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1762
1763 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001764 vmx->rmode.save_rflags = flags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001765
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001766 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001767
1768 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10001769 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001770 update_exception_bitmap(vcpu);
1771
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001772 if (emulate_invalid_guest_state)
1773 goto continue_rmode;
1774
Avi Kivity6aa8b732006-12-10 02:21:36 -08001775 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1776 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1777 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1778
1779 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08001780 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02001781 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1782 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001783 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1784
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001785 fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es);
1786 fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds);
1787 fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs);
1788 fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03001789
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001790continue_rmode:
Eddie Dong8668a3c2007-10-10 14:26:45 +08001791 kvm_mmu_reset_context(vcpu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08001792 init_rmode(vcpu->kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001793}
1794
Amit Shah401d10d2009-02-20 22:53:37 +05301795static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1796{
1797 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001798 struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
1799
1800 if (!msr)
1801 return;
Amit Shah401d10d2009-02-20 22:53:37 +05301802
Avi Kivity44ea2b12009-09-06 15:55:37 +03001803 /*
1804 * Force kernel_gs_base reloading before EFER changes, as control
1805 * of this msr depends on is_long_mode().
1806 */
1807 vmx_load_host_state(to_vmx(vcpu));
Avi Kivityf6801df2010-01-21 15:31:50 +02001808 vcpu->arch.efer = efer;
Amit Shah401d10d2009-02-20 22:53:37 +05301809 if (efer & EFER_LMA) {
1810 vmcs_write32(VM_ENTRY_CONTROLS,
1811 vmcs_read32(VM_ENTRY_CONTROLS) |
1812 VM_ENTRY_IA32E_MODE);
1813 msr->data = efer;
1814 } else {
1815 vmcs_write32(VM_ENTRY_CONTROLS,
1816 vmcs_read32(VM_ENTRY_CONTROLS) &
1817 ~VM_ENTRY_IA32E_MODE);
1818
1819 msr->data = efer & ~EFER_LME;
1820 }
1821 setup_msrs(vmx);
1822}
1823
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001824#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001825
1826static void enter_lmode(struct kvm_vcpu *vcpu)
1827{
1828 u32 guest_tr_ar;
1829
1830 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1831 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1832 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001833 __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001834 vmcs_write32(GUEST_TR_AR_BYTES,
1835 (guest_tr_ar & ~AR_TYPE_MASK)
1836 | AR_TYPE_BUSY_64_TSS);
1837 }
Avi Kivityda38f432010-07-06 11:30:49 +03001838 vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001839}
1840
1841static void exit_lmode(struct kvm_vcpu *vcpu)
1842{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001843 vmcs_write32(VM_ENTRY_CONTROLS,
1844 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001845 & ~VM_ENTRY_IA32E_MODE);
Avi Kivityda38f432010-07-06 11:30:49 +03001846 vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001847}
1848
1849#endif
1850
Sheng Yang2384d2b2008-01-17 15:14:33 +08001851static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
1852{
Gui Jianfengb9d762f2010-06-07 10:32:29 +08001853 vpid_sync_context(to_vmx(vcpu));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08001854 if (enable_ept) {
1855 if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
1856 return;
Sheng Yang4e1096d2008-07-06 19:16:51 +08001857 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08001858 }
Sheng Yang2384d2b2008-01-17 15:14:33 +08001859}
1860
Avi Kivitye8467fd2009-12-29 18:43:06 +02001861static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1862{
1863 ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
1864
1865 vcpu->arch.cr0 &= ~cr0_guest_owned_bits;
1866 vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
1867}
1868
Anthony Liguori25c4c272007-04-27 09:29:21 +03001869static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001870{
Avi Kivityfc78f512009-12-07 12:16:48 +02001871 ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
1872
1873 vcpu->arch.cr4 &= ~cr4_guest_owned_bits;
1874 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits;
Avi Kivity399badf2007-01-05 16:36:38 -08001875}
1876
Sheng Yang14394422008-04-28 12:24:45 +08001877static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
1878{
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001879 if (!test_bit(VCPU_EXREG_PDPTR,
1880 (unsigned long *)&vcpu->arch.regs_dirty))
1881 return;
1882
Sheng Yang14394422008-04-28 12:24:45 +08001883 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02001884 vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]);
1885 vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]);
1886 vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]);
1887 vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]);
Sheng Yang14394422008-04-28 12:24:45 +08001888 }
1889}
1890
Avi Kivity8f5d5492009-05-31 18:41:29 +03001891static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
1892{
1893 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02001894 vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0);
1895 vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1);
1896 vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2);
1897 vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001898 }
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001899
1900 __set_bit(VCPU_EXREG_PDPTR,
1901 (unsigned long *)&vcpu->arch.regs_avail);
1902 __set_bit(VCPU_EXREG_PDPTR,
1903 (unsigned long *)&vcpu->arch.regs_dirty);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001904}
1905
Sheng Yang14394422008-04-28 12:24:45 +08001906static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1907
1908static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
1909 unsigned long cr0,
1910 struct kvm_vcpu *vcpu)
1911{
1912 if (!(cr0 & X86_CR0_PG)) {
1913 /* From paging/starting to nonpaging */
1914 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001915 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
Sheng Yang14394422008-04-28 12:24:45 +08001916 (CPU_BASED_CR3_LOAD_EXITING |
1917 CPU_BASED_CR3_STORE_EXITING));
1918 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001919 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001920 } else if (!is_paging(vcpu)) {
1921 /* From nonpaging to paging */
1922 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001923 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
Sheng Yang14394422008-04-28 12:24:45 +08001924 ~(CPU_BASED_CR3_LOAD_EXITING |
1925 CPU_BASED_CR3_STORE_EXITING));
1926 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001927 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001928 }
Sheng Yang95eb84a2009-08-19 09:52:18 +08001929
1930 if (!(cr0 & X86_CR0_WP))
1931 *hw_cr0 &= ~X86_CR0_WP;
Sheng Yang14394422008-04-28 12:24:45 +08001932}
1933
Avi Kivity6aa8b732006-12-10 02:21:36 -08001934static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1935{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001936 struct vcpu_vmx *vmx = to_vmx(vcpu);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001937 unsigned long hw_cr0;
1938
1939 if (enable_unrestricted_guest)
1940 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST)
1941 | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST;
1942 else
1943 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON;
Sheng Yang14394422008-04-28 12:24:45 +08001944
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001945 if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001946 enter_pmode(vcpu);
1947
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001948 if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001949 enter_rmode(vcpu);
1950
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001951#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02001952 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92f2007-07-17 23:19:08 +10001953 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001954 enter_lmode(vcpu);
Rusty Russell707d92f2007-07-17 23:19:08 +10001955 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001956 exit_lmode(vcpu);
1957 }
1958#endif
1959
Avi Kivity089d0342009-03-23 18:26:32 +02001960 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08001961 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
1962
Avi Kivity02daab22009-12-30 12:40:26 +02001963 if (!vcpu->fpu_active)
Avi Kivity81231c62010-01-24 16:26:40 +02001964 hw_cr0 |= X86_CR0_TS | X86_CR0_MP;
Avi Kivity02daab22009-12-30 12:40:26 +02001965
Avi Kivity6aa8b732006-12-10 02:21:36 -08001966 vmcs_writel(CR0_READ_SHADOW, cr0);
Sheng Yang14394422008-04-28 12:24:45 +08001967 vmcs_writel(GUEST_CR0, hw_cr0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001968 vcpu->arch.cr0 = cr0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001969}
1970
Sheng Yang14394422008-04-28 12:24:45 +08001971static u64 construct_eptp(unsigned long root_hpa)
1972{
1973 u64 eptp;
1974
1975 /* TODO write the value reading from MSR */
1976 eptp = VMX_EPT_DEFAULT_MT |
1977 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
1978 eptp |= (root_hpa & PAGE_MASK);
1979
1980 return eptp;
1981}
1982
Avi Kivity6aa8b732006-12-10 02:21:36 -08001983static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
1984{
Sheng Yang14394422008-04-28 12:24:45 +08001985 unsigned long guest_cr3;
1986 u64 eptp;
1987
1988 guest_cr3 = cr3;
Avi Kivity089d0342009-03-23 18:26:32 +02001989 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08001990 eptp = construct_eptp(cr3);
1991 vmcs_write64(EPT_POINTER, eptp);
Sheng Yang14394422008-04-28 12:24:45 +08001992 guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
Sheng Yangb927a3c2009-07-21 10:42:48 +08001993 vcpu->kvm->arch.ept_identity_map_addr;
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02001994 ept_load_pdptrs(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001995 }
1996
Sheng Yang2384d2b2008-01-17 15:14:33 +08001997 vmx_flush_tlb(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001998 vmcs_writel(GUEST_CR3, guest_cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001999}
2000
2001static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
2002{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002003 unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ?
Sheng Yang14394422008-04-28 12:24:45 +08002004 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
2005
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002006 vcpu->arch.cr4 = cr4;
Avi Kivitybc230082009-12-08 12:14:42 +02002007 if (enable_ept) {
2008 if (!is_paging(vcpu)) {
2009 hw_cr4 &= ~X86_CR4_PAE;
2010 hw_cr4 |= X86_CR4_PSE;
2011 } else if (!(cr4 & X86_CR4_PAE)) {
2012 hw_cr4 &= ~X86_CR4_PAE;
2013 }
2014 }
Sheng Yang14394422008-04-28 12:24:45 +08002015
2016 vmcs_writel(CR4_READ_SHADOW, cr4);
2017 vmcs_writel(GUEST_CR4, hw_cr4);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002018}
2019
Avi Kivity6aa8b732006-12-10 02:21:36 -08002020static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
2021{
2022 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2023
2024 return vmcs_readl(sf->base);
2025}
2026
2027static void vmx_get_segment(struct kvm_vcpu *vcpu,
2028 struct kvm_segment *var, int seg)
2029{
2030 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2031 u32 ar;
2032
2033 var->base = vmcs_readl(sf->base);
2034 var->limit = vmcs_read32(sf->limit);
2035 var->selector = vmcs_read16(sf->selector);
2036 ar = vmcs_read32(sf->ar_bytes);
Avi Kivity9fd4a3b2009-01-04 23:43:42 +02002037 if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002038 ar = 0;
2039 var->type = ar & 15;
2040 var->s = (ar >> 4) & 1;
2041 var->dpl = (ar >> 5) & 3;
2042 var->present = (ar >> 7) & 1;
2043 var->avl = (ar >> 12) & 1;
2044 var->l = (ar >> 13) & 1;
2045 var->db = (ar >> 14) & 1;
2046 var->g = (ar >> 15) & 1;
2047 var->unusable = (ar >> 16) & 1;
2048}
2049
Izik Eidus2e4d2652008-03-24 19:38:34 +02002050static int vmx_get_cpl(struct kvm_vcpu *vcpu)
2051{
Avi Kivity3eeb3282010-01-21 15:31:48 +02002052 if (!is_protmode(vcpu))
Izik Eidus2e4d2652008-03-24 19:38:34 +02002053 return 0;
2054
2055 if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */
2056 return 3;
2057
Avi Kivityeab4b8a2009-08-04 15:02:54 +03002058 return vmcs_read16(GUEST_CS_SELECTOR) & 3;
Izik Eidus2e4d2652008-03-24 19:38:34 +02002059}
2060
Avi Kivity653e3102007-05-07 10:55:37 +03002061static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002062{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002063 u32 ar;
2064
Avi Kivity653e3102007-05-07 10:55:37 +03002065 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002066 ar = 1 << 16;
2067 else {
2068 ar = var->type & 15;
2069 ar |= (var->s & 1) << 4;
2070 ar |= (var->dpl & 3) << 5;
2071 ar |= (var->present & 1) << 7;
2072 ar |= (var->avl & 1) << 12;
2073 ar |= (var->l & 1) << 13;
2074 ar |= (var->db & 1) << 14;
2075 ar |= (var->g & 1) << 15;
2076 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08002077 if (ar == 0) /* a 0 value means unusable */
2078 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03002079
2080 return ar;
2081}
2082
2083static void vmx_set_segment(struct kvm_vcpu *vcpu,
2084 struct kvm_segment *var, int seg)
2085{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002086 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity653e3102007-05-07 10:55:37 +03002087 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2088 u32 ar;
2089
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002090 if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) {
2091 vmx->rmode.tr.selector = var->selector;
2092 vmx->rmode.tr.base = var->base;
2093 vmx->rmode.tr.limit = var->limit;
2094 vmx->rmode.tr.ar = vmx_segment_access_rights(var);
Avi Kivity653e3102007-05-07 10:55:37 +03002095 return;
2096 }
2097 vmcs_writel(sf->base, var->base);
2098 vmcs_write32(sf->limit, var->limit);
2099 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002100 if (vmx->rmode.vm86_active && var->s) {
Avi Kivity653e3102007-05-07 10:55:37 +03002101 /*
2102 * Hack real-mode segments into vm86 compatibility.
2103 */
2104 if (var->base == 0xffff0000 && var->selector == 0xf000)
2105 vmcs_writel(sf->base, 0xf0000);
2106 ar = 0xf3;
2107 } else
2108 ar = vmx_segment_access_rights(var);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002109
2110 /*
2111 * Fix the "Accessed" bit in AR field of segment registers for older
2112 * qemu binaries.
2113 * IA32 arch specifies that at the time of processor reset the
2114 * "Accessed" bit in the AR field of segment registers is 1. And qemu
2115 * is setting it to 0 in the usedland code. This causes invalid guest
2116 * state vmexit when "unrestricted guest" mode is turned on.
2117 * Fix for this setup issue in cpu_reset is being pushed in the qemu
2118 * tree. Newer qemu binaries with that qemu fix would not need this
2119 * kvm hack.
2120 */
2121 if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR))
2122 ar |= 0x1; /* Accessed */
2123
Avi Kivity6aa8b732006-12-10 02:21:36 -08002124 vmcs_write32(sf->ar_bytes, ar);
2125}
2126
Avi Kivity6aa8b732006-12-10 02:21:36 -08002127static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2128{
2129 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
2130
2131 *db = (ar >> 14) & 1;
2132 *l = (ar >> 13) & 1;
2133}
2134
Gleb Natapov89a27f42010-02-16 10:51:48 +02002135static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002136{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002137 dt->size = vmcs_read32(GUEST_IDTR_LIMIT);
2138 dt->address = vmcs_readl(GUEST_IDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002139}
2140
Gleb Natapov89a27f42010-02-16 10:51:48 +02002141static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002142{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002143 vmcs_write32(GUEST_IDTR_LIMIT, dt->size);
2144 vmcs_writel(GUEST_IDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002145}
2146
Gleb Natapov89a27f42010-02-16 10:51:48 +02002147static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002148{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002149 dt->size = vmcs_read32(GUEST_GDTR_LIMIT);
2150 dt->address = vmcs_readl(GUEST_GDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002151}
2152
Gleb Natapov89a27f42010-02-16 10:51:48 +02002153static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002154{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002155 vmcs_write32(GUEST_GDTR_LIMIT, dt->size);
2156 vmcs_writel(GUEST_GDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002157}
2158
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002159static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
2160{
2161 struct kvm_segment var;
2162 u32 ar;
2163
2164 vmx_get_segment(vcpu, &var, seg);
2165 ar = vmx_segment_access_rights(&var);
2166
2167 if (var.base != (var.selector << 4))
2168 return false;
2169 if (var.limit != 0xffff)
2170 return false;
2171 if (ar != 0xf3)
2172 return false;
2173
2174 return true;
2175}
2176
2177static bool code_segment_valid(struct kvm_vcpu *vcpu)
2178{
2179 struct kvm_segment cs;
2180 unsigned int cs_rpl;
2181
2182 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2183 cs_rpl = cs.selector & SELECTOR_RPL_MASK;
2184
Avi Kivity1872a3f2009-01-04 23:26:52 +02002185 if (cs.unusable)
2186 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002187 if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
2188 return false;
2189 if (!cs.s)
2190 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002191 if (cs.type & AR_TYPE_WRITEABLE_MASK) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002192 if (cs.dpl > cs_rpl)
2193 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002194 } else {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002195 if (cs.dpl != cs_rpl)
2196 return false;
2197 }
2198 if (!cs.present)
2199 return false;
2200
2201 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
2202 return true;
2203}
2204
2205static bool stack_segment_valid(struct kvm_vcpu *vcpu)
2206{
2207 struct kvm_segment ss;
2208 unsigned int ss_rpl;
2209
2210 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2211 ss_rpl = ss.selector & SELECTOR_RPL_MASK;
2212
Avi Kivity1872a3f2009-01-04 23:26:52 +02002213 if (ss.unusable)
2214 return true;
2215 if (ss.type != 3 && ss.type != 7)
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002216 return false;
2217 if (!ss.s)
2218 return false;
2219 if (ss.dpl != ss_rpl) /* DPL != RPL */
2220 return false;
2221 if (!ss.present)
2222 return false;
2223
2224 return true;
2225}
2226
2227static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
2228{
2229 struct kvm_segment var;
2230 unsigned int rpl;
2231
2232 vmx_get_segment(vcpu, &var, seg);
2233 rpl = var.selector & SELECTOR_RPL_MASK;
2234
Avi Kivity1872a3f2009-01-04 23:26:52 +02002235 if (var.unusable)
2236 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002237 if (!var.s)
2238 return false;
2239 if (!var.present)
2240 return false;
2241 if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
2242 if (var.dpl < rpl) /* DPL < RPL */
2243 return false;
2244 }
2245
2246 /* TODO: Add other members to kvm_segment_field to allow checking for other access
2247 * rights flags
2248 */
2249 return true;
2250}
2251
2252static bool tr_valid(struct kvm_vcpu *vcpu)
2253{
2254 struct kvm_segment tr;
2255
2256 vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);
2257
Avi Kivity1872a3f2009-01-04 23:26:52 +02002258 if (tr.unusable)
2259 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002260 if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2261 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002262 if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002263 return false;
2264 if (!tr.present)
2265 return false;
2266
2267 return true;
2268}
2269
2270static bool ldtr_valid(struct kvm_vcpu *vcpu)
2271{
2272 struct kvm_segment ldtr;
2273
2274 vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);
2275
Avi Kivity1872a3f2009-01-04 23:26:52 +02002276 if (ldtr.unusable)
2277 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002278 if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2279 return false;
2280 if (ldtr.type != 2)
2281 return false;
2282 if (!ldtr.present)
2283 return false;
2284
2285 return true;
2286}
2287
2288static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
2289{
2290 struct kvm_segment cs, ss;
2291
2292 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2293 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2294
2295 return ((cs.selector & SELECTOR_RPL_MASK) ==
2296 (ss.selector & SELECTOR_RPL_MASK));
2297}
2298
2299/*
2300 * Check if guest state is valid. Returns true if valid, false if
2301 * not.
2302 * We assume that registers are always usable
2303 */
2304static bool guest_state_valid(struct kvm_vcpu *vcpu)
2305{
2306 /* real mode guest state checks */
Avi Kivity3eeb3282010-01-21 15:31:48 +02002307 if (!is_protmode(vcpu)) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002308 if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
2309 return false;
2310 if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
2311 return false;
2312 if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
2313 return false;
2314 if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
2315 return false;
2316 if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
2317 return false;
2318 if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
2319 return false;
2320 } else {
2321 /* protected mode guest state checks */
2322 if (!cs_ss_rpl_check(vcpu))
2323 return false;
2324 if (!code_segment_valid(vcpu))
2325 return false;
2326 if (!stack_segment_valid(vcpu))
2327 return false;
2328 if (!data_segment_valid(vcpu, VCPU_SREG_DS))
2329 return false;
2330 if (!data_segment_valid(vcpu, VCPU_SREG_ES))
2331 return false;
2332 if (!data_segment_valid(vcpu, VCPU_SREG_FS))
2333 return false;
2334 if (!data_segment_valid(vcpu, VCPU_SREG_GS))
2335 return false;
2336 if (!tr_valid(vcpu))
2337 return false;
2338 if (!ldtr_valid(vcpu))
2339 return false;
2340 }
2341 /* TODO:
2342 * - Add checks on RIP
2343 * - Add checks on RFLAGS
2344 */
2345
2346 return true;
2347}
2348
Mike Dayd77c26f2007-10-08 09:02:08 -04002349static int init_rmode_tss(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002350{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002351 gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
Izik Eidus195aefd2007-10-01 22:14:18 +02002352 u16 data = 0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002353 int ret = 0;
Izik Eidus195aefd2007-10-01 22:14:18 +02002354 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002355
Izik Eidus195aefd2007-10-01 22:14:18 +02002356 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2357 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002358 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002359 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
Sheng Yang464d17c2008-08-13 14:10:33 +08002360 r = kvm_write_guest_page(kvm, fn++, &data,
2361 TSS_IOPB_BASE_OFFSET, sizeof(u16));
Izik Eidus195aefd2007-10-01 22:14:18 +02002362 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002363 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002364 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
2365 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002366 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002367 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2368 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002369 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002370 data = ~0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002371 r = kvm_write_guest_page(kvm, fn, &data,
2372 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
2373 sizeof(u8));
Izik Eidus195aefd2007-10-01 22:14:18 +02002374 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002375 goto out;
2376
2377 ret = 1;
2378out:
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002379 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002380}
2381
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002382static int init_rmode_identity_map(struct kvm *kvm)
2383{
2384 int i, r, ret;
2385 pfn_t identity_map_pfn;
2386 u32 tmp;
2387
Avi Kivity089d0342009-03-23 18:26:32 +02002388 if (!enable_ept)
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002389 return 1;
2390 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
2391 printk(KERN_ERR "EPT: identity-mapping pagetable "
2392 "haven't been allocated!\n");
2393 return 0;
2394 }
2395 if (likely(kvm->arch.ept_identity_pagetable_done))
2396 return 1;
2397 ret = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002398 identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002399 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
2400 if (r < 0)
2401 goto out;
2402 /* Set up identity-mapping pagetable for EPT in real mode */
2403 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
2404 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
2405 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
2406 r = kvm_write_guest_page(kvm, identity_map_pfn,
2407 &tmp, i * sizeof(tmp), sizeof(tmp));
2408 if (r < 0)
2409 goto out;
2410 }
2411 kvm->arch.ept_identity_pagetable_done = true;
2412 ret = 1;
2413out:
2414 return ret;
2415}
2416
Avi Kivity6aa8b732006-12-10 02:21:36 -08002417static void seg_setup(int seg)
2418{
2419 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002420 unsigned int ar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002421
2422 vmcs_write16(sf->selector, 0);
2423 vmcs_writel(sf->base, 0);
2424 vmcs_write32(sf->limit, 0xffff);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002425 if (enable_unrestricted_guest) {
2426 ar = 0x93;
2427 if (seg == VCPU_SREG_CS)
2428 ar |= 0x08; /* code segment */
2429 } else
2430 ar = 0xf3;
2431
2432 vmcs_write32(sf->ar_bytes, ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002433}
2434
Sheng Yangf78e0e22007-10-29 09:40:42 +08002435static int alloc_apic_access_page(struct kvm *kvm)
2436{
2437 struct kvm_userspace_memory_region kvm_userspace_mem;
2438 int r = 0;
2439
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002440 mutex_lock(&kvm->slots_lock);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002441 if (kvm->arch.apic_access_page)
Sheng Yangf78e0e22007-10-29 09:40:42 +08002442 goto out;
2443 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
2444 kvm_userspace_mem.flags = 0;
2445 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
2446 kvm_userspace_mem.memory_size = PAGE_SIZE;
2447 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2448 if (r)
2449 goto out;
Izik Eidus72dc67a2008-02-10 18:04:15 +02002450
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002451 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002452out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002453 mutex_unlock(&kvm->slots_lock);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002454 return r;
2455}
2456
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002457static int alloc_identity_pagetable(struct kvm *kvm)
2458{
2459 struct kvm_userspace_memory_region kvm_userspace_mem;
2460 int r = 0;
2461
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002462 mutex_lock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002463 if (kvm->arch.ept_identity_pagetable)
2464 goto out;
2465 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
2466 kvm_userspace_mem.flags = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002467 kvm_userspace_mem.guest_phys_addr =
2468 kvm->arch.ept_identity_map_addr;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002469 kvm_userspace_mem.memory_size = PAGE_SIZE;
2470 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2471 if (r)
2472 goto out;
2473
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002474 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
Sheng Yangb927a3c2009-07-21 10:42:48 +08002475 kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002476out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002477 mutex_unlock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002478 return r;
2479}
2480
Sheng Yang2384d2b2008-01-17 15:14:33 +08002481static void allocate_vpid(struct vcpu_vmx *vmx)
2482{
2483 int vpid;
2484
2485 vmx->vpid = 0;
Avi Kivity919818a2009-03-23 18:01:29 +02002486 if (!enable_vpid)
Sheng Yang2384d2b2008-01-17 15:14:33 +08002487 return;
2488 spin_lock(&vmx_vpid_lock);
2489 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
2490 if (vpid < VMX_NR_VPIDS) {
2491 vmx->vpid = vpid;
2492 __set_bit(vpid, vmx_vpid_bitmap);
2493 }
2494 spin_unlock(&vmx_vpid_lock);
2495}
2496
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08002497static void free_vpid(struct vcpu_vmx *vmx)
2498{
2499 if (!enable_vpid)
2500 return;
2501 spin_lock(&vmx_vpid_lock);
2502 if (vmx->vpid != 0)
2503 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
2504 spin_unlock(&vmx_vpid_lock);
2505}
2506
Avi Kivity58972972009-02-24 22:26:47 +02002507static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr)
Sheng Yang25c5f222008-03-28 13:18:56 +08002508{
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002509 int f = sizeof(unsigned long);
Sheng Yang25c5f222008-03-28 13:18:56 +08002510
2511 if (!cpu_has_vmx_msr_bitmap())
2512 return;
2513
2514 /*
2515 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
2516 * have the write-low and read-high bitmap offsets the wrong way round.
2517 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
2518 */
Sheng Yang25c5f222008-03-28 13:18:56 +08002519 if (msr <= 0x1fff) {
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002520 __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */
2521 __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */
Sheng Yang25c5f222008-03-28 13:18:56 +08002522 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
2523 msr &= 0x1fff;
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002524 __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */
2525 __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */
Sheng Yang25c5f222008-03-28 13:18:56 +08002526 }
Sheng Yang25c5f222008-03-28 13:18:56 +08002527}
2528
Avi Kivity58972972009-02-24 22:26:47 +02002529static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only)
2530{
2531 if (!longmode_only)
2532 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr);
2533 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr);
2534}
2535
Avi Kivity6aa8b732006-12-10 02:21:36 -08002536/*
2537 * Sets up the vmcs for emulated real mode.
2538 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002539static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002540{
Sheng Yang468d4722008-10-09 16:01:55 +08002541 u32 host_sysenter_cs, msr_low, msr_high;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002542 u32 junk;
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10002543 u64 host_pat;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002544 unsigned long a;
Gleb Natapov89a27f42010-02-16 10:51:48 +02002545 struct desc_ptr dt;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002546 int i;
Avi Kivitycd2276a2007-05-14 20:41:13 +03002547 unsigned long kvm_vmx_return;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002548 u32 exec_control;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002549
Avi Kivity6aa8b732006-12-10 02:21:36 -08002550 /* I/O */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002551 vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a));
2552 vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002553
Sheng Yang25c5f222008-03-28 13:18:56 +08002554 if (cpu_has_vmx_msr_bitmap())
Avi Kivity58972972009-02-24 22:26:47 +02002555 vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy));
Sheng Yang25c5f222008-03-28 13:18:56 +08002556
Avi Kivity6aa8b732006-12-10 02:21:36 -08002557 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
2558
Avi Kivity6aa8b732006-12-10 02:21:36 -08002559 /* Control */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002560 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
2561 vmcs_config.pin_based_exec_ctrl);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002562
2563 exec_control = vmcs_config.cpu_based_exec_ctrl;
2564 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
2565 exec_control &= ~CPU_BASED_TPR_SHADOW;
2566#ifdef CONFIG_X86_64
2567 exec_control |= CPU_BASED_CR8_STORE_EXITING |
2568 CPU_BASED_CR8_LOAD_EXITING;
2569#endif
2570 }
Avi Kivity089d0342009-03-23 18:26:32 +02002571 if (!enable_ept)
Sheng Yangd56f5462008-04-25 10:13:16 +08002572 exec_control |= CPU_BASED_CR3_STORE_EXITING |
Marcelo Tosatti83dbc832008-10-07 17:01:27 -03002573 CPU_BASED_CR3_LOAD_EXITING |
2574 CPU_BASED_INVLPG_EXITING;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002575 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002576
Sheng Yang83ff3b92007-11-21 14:33:25 +08002577 if (cpu_has_secondary_exec_ctrls()) {
2578 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
2579 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2580 exec_control &=
2581 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
Sheng Yang2384d2b2008-01-17 15:14:33 +08002582 if (vmx->vpid == 0)
2583 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang046d8712009-11-27 16:46:26 +08002584 if (!enable_ept) {
Sheng Yangd56f5462008-04-25 10:13:16 +08002585 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
Sheng Yang046d8712009-11-27 16:46:26 +08002586 enable_unrestricted_guest = 0;
2587 }
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002588 if (!enable_unrestricted_guest)
2589 exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002590 if (!ple_gap)
2591 exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
Sheng Yang83ff3b92007-11-21 14:33:25 +08002592 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
2593 }
Sheng Yangf78e0e22007-10-29 09:40:42 +08002594
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002595 if (ple_gap) {
2596 vmcs_write32(PLE_GAP, ple_gap);
2597 vmcs_write32(PLE_WINDOW, ple_window);
2598 }
2599
Avi Kivityc7addb92007-09-16 18:58:32 +02002600 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
2601 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002602 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
2603
Avi Kivity1c11e712010-05-03 16:05:44 +03002604 vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002605 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
2606 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
2607
2608 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
2609 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
2610 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity9581d442010-10-19 16:46:55 +02002611 vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */
2612 vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002613 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002614#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002615 rdmsrl(MSR_FS_BASE, a);
2616 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
2617 rdmsrl(MSR_GS_BASE, a);
2618 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
2619#else
2620 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
2621 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
2622#endif
2623
2624 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
2625
Wei Yongjunec687982010-03-05 12:11:48 +08002626 native_store_idt(&dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02002627 vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002628
Mike Dayd77c26f2007-10-08 09:02:08 -04002629 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
Avi Kivitycd2276a2007-05-14 20:41:13 +03002630 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03002631 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
2632 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03002633 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host));
Eddie Dong2cc51562007-05-21 07:28:09 +03002634 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03002635 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002636
2637 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
2638 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
2639 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
2640 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
2641 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
2642 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
2643
Sheng Yang468d4722008-10-09 16:01:55 +08002644 if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
2645 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2646 host_pat = msr_low | ((u64) msr_high << 32);
2647 vmcs_write64(HOST_IA32_PAT, host_pat);
2648 }
2649 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2650 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2651 host_pat = msr_low | ((u64) msr_high << 32);
2652 /* Write the default value follow host pat */
2653 vmcs_write64(GUEST_IA32_PAT, host_pat);
2654 /* Keep arch.pat sync with GUEST_IA32_PAT */
2655 vmx->vcpu.arch.pat = host_pat;
2656 }
2657
Avi Kivity6aa8b732006-12-10 02:21:36 -08002658 for (i = 0; i < NR_VMX_MSR; ++i) {
2659 u32 index = vmx_msr_index[i];
2660 u32 data_low, data_high;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002661 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002662
2663 if (rdmsr_safe(index, &data_low, &data_high) < 0)
2664 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08002665 if (wrmsr_safe(index, data_low, data_high) < 0)
2666 continue;
Avi Kivity26bb0982009-09-07 11:14:12 +03002667 vmx->guest_msrs[j].index = i;
2668 vmx->guest_msrs[j].data = 0;
Avi Kivityd5696722009-12-02 12:28:47 +02002669 vmx->guest_msrs[j].mask = -1ull;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002670 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002671 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002672
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002673 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002674
2675 /* 22.2.1, 20.8.1 */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002676 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
2677
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002678 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
Avi Kivity4c386092009-12-07 12:26:18 +02002679 vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS;
Avi Kivityce03e4f2009-12-07 12:29:14 +02002680 if (enable_ept)
2681 vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE;
Avi Kivity4c386092009-12-07 12:26:18 +02002682 vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002683
Zachary Amsden99e3e302010-08-19 22:07:17 -10002684 kvm_write_tsc(&vmx->vcpu, 0);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002685
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002686 return 0;
2687}
2688
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002689static int init_rmode(struct kvm *kvm)
2690{
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002691 int idx, ret = 0;
2692
2693 idx = srcu_read_lock(&kvm->srcu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002694 if (!init_rmode_tss(kvm))
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002695 goto exit;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002696 if (!init_rmode_identity_map(kvm))
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002697 goto exit;
2698
2699 ret = 1;
2700exit:
2701 srcu_read_unlock(&kvm->srcu, idx);
2702 return ret;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002703}
2704
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002705static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
2706{
2707 struct vcpu_vmx *vmx = to_vmx(vcpu);
2708 u64 msr;
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002709 int ret;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002710
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002711 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002712 if (!init_rmode(vmx->vcpu.kvm)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002713 ret = -ENOMEM;
2714 goto out;
2715 }
2716
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002717 vmx->rmode.vm86_active = 0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002718
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002719 vmx->soft_vnmi_blocked = 0;
2720
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002721 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002722 kvm_set_cr8(&vmx->vcpu, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002723 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002724 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002725 msr |= MSR_IA32_APICBASE_BSP;
2726 kvm_set_apic_base(&vmx->vcpu, msr);
2727
Jan Kiszka10ab25c2010-05-25 16:01:50 +02002728 ret = fx_init(&vmx->vcpu);
2729 if (ret != 0)
2730 goto out;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002731
Avi Kivity5706be02008-08-20 15:07:31 +03002732 seg_setup(VCPU_SREG_CS);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002733 /*
2734 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2735 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2736 */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002737 if (kvm_vcpu_is_bsp(&vmx->vcpu)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002738 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
2739 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
2740 } else {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002741 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
2742 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002743 }
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002744
2745 seg_setup(VCPU_SREG_DS);
2746 seg_setup(VCPU_SREG_ES);
2747 seg_setup(VCPU_SREG_FS);
2748 seg_setup(VCPU_SREG_GS);
2749 seg_setup(VCPU_SREG_SS);
2750
2751 vmcs_write16(GUEST_TR_SELECTOR, 0);
2752 vmcs_writel(GUEST_TR_BASE, 0);
2753 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
2754 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2755
2756 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
2757 vmcs_writel(GUEST_LDTR_BASE, 0);
2758 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
2759 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
2760
2761 vmcs_write32(GUEST_SYSENTER_CS, 0);
2762 vmcs_writel(GUEST_SYSENTER_ESP, 0);
2763 vmcs_writel(GUEST_SYSENTER_EIP, 0);
2764
2765 vmcs_writel(GUEST_RFLAGS, 0x02);
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002766 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002767 kvm_rip_write(vcpu, 0xfff0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002768 else
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002769 kvm_rip_write(vcpu, 0);
2770 kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002771
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002772 vmcs_writel(GUEST_DR7, 0x400);
2773
2774 vmcs_writel(GUEST_GDTR_BASE, 0);
2775 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
2776
2777 vmcs_writel(GUEST_IDTR_BASE, 0);
2778 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
2779
Anthony Liguori443381a2010-12-06 10:53:38 -06002780 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002781 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
2782 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
2783
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002784 /* Special registers */
2785 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
2786
2787 setup_msrs(vmx);
2788
Avi Kivity6aa8b732006-12-10 02:21:36 -08002789 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
2790
Sheng Yangf78e0e22007-10-29 09:40:42 +08002791 if (cpu_has_vmx_tpr_shadow()) {
2792 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
2793 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
2794 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002795 page_to_phys(vmx->vcpu.arch.apic->regs_page));
Sheng Yangf78e0e22007-10-29 09:40:42 +08002796 vmcs_write32(TPR_THRESHOLD, 0);
2797 }
2798
2799 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2800 vmcs_write64(APIC_ACCESS_ADDR,
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002801 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002802
Sheng Yang2384d2b2008-01-17 15:14:33 +08002803 if (vmx->vpid != 0)
2804 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2805
Eduardo Habkostfa400522009-10-24 02:49:58 -02002806 vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
Avi Kivity4d4ec082009-12-29 18:07:30 +02002807 vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002808 vmx_set_cr4(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002809 vmx_set_efer(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002810 vmx_fpu_activate(&vmx->vcpu);
2811 update_exception_bitmap(&vmx->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002812
Gui Jianfengb9d762f2010-06-07 10:32:29 +08002813 vpid_sync_context(vmx);
Sheng Yang2384d2b2008-01-17 15:14:33 +08002814
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002815 ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002816
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002817 /* HACK: Don't enable emulation on guest boot/reset */
2818 vmx->emulation_required = 0;
2819
Avi Kivity6aa8b732006-12-10 02:21:36 -08002820out:
2821 return ret;
2822}
2823
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002824static void enable_irq_window(struct kvm_vcpu *vcpu)
2825{
2826 u32 cpu_based_vm_exec_control;
2827
2828 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2829 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2830 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2831}
2832
2833static void enable_nmi_window(struct kvm_vcpu *vcpu)
2834{
2835 u32 cpu_based_vm_exec_control;
2836
2837 if (!cpu_has_virtual_nmis()) {
2838 enable_irq_window(vcpu);
2839 return;
2840 }
2841
Avi Kivity30bd0c42010-11-01 23:20:48 +02002842 if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) {
2843 enable_irq_window(vcpu);
2844 return;
2845 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002846 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2847 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
2848 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2849}
2850
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002851static void vmx_inject_irq(struct kvm_vcpu *vcpu)
Eddie Dong85f455f2007-07-06 12:20:49 +03002852{
Avi Kivity9c8cba32007-11-22 11:42:59 +02002853 struct vcpu_vmx *vmx = to_vmx(vcpu);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002854 uint32_t intr;
2855 int irq = vcpu->arch.interrupt.nr;
Avi Kivity9c8cba32007-11-22 11:42:59 +02002856
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002857 trace_kvm_inj_virq(irq);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002858
Avi Kivityfa89a812008-09-01 15:57:51 +03002859 ++vcpu->stat.irq_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002860 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02002861 if (kvm_inject_realmode_interrupt(vcpu, irq) != EMULATE_DONE)
2862 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002863 return;
2864 }
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002865 intr = irq | INTR_INFO_VALID_MASK;
2866 if (vcpu->arch.interrupt.soft) {
2867 intr |= INTR_TYPE_SOFT_INTR;
2868 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2869 vmx->vcpu.arch.event_exit_inst_len);
2870 } else
2871 intr |= INTR_TYPE_EXT_INTR;
2872 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
Anthony Liguori443381a2010-12-06 10:53:38 -06002873 vmx_clear_hlt(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002874}
2875
Sheng Yangf08864b2008-05-15 18:23:25 +08002876static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
2877{
Jan Kiszka66a5a342008-09-26 09:30:51 +02002878 struct vcpu_vmx *vmx = to_vmx(vcpu);
2879
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002880 if (!cpu_has_virtual_nmis()) {
2881 /*
2882 * Tracking the NMI-blocked state in software is built upon
2883 * finding the next open IRQ window. This, in turn, depends on
2884 * well-behaving guests: They have to keep IRQs disabled at
2885 * least as long as the NMI handler runs. Otherwise we may
2886 * cause NMI nesting, maybe breaking the guest. But as this is
2887 * highly unlikely, we can live with the residual risk.
2888 */
2889 vmx->soft_vnmi_blocked = 1;
2890 vmx->vnmi_blocked_time = 0;
2891 }
2892
Jan Kiszka487b3912008-09-26 09:30:56 +02002893 ++vcpu->stat.nmi_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002894 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02002895 if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR) != EMULATE_DONE)
2896 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka66a5a342008-09-26 09:30:51 +02002897 return;
2898 }
Sheng Yangf08864b2008-05-15 18:23:25 +08002899 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2900 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
Anthony Liguori443381a2010-12-06 10:53:38 -06002901 vmx_clear_hlt(vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08002902}
2903
Gleb Natapovc4282df2009-04-21 17:45:07 +03002904static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
Jan Kiszka33f089c2008-09-26 09:30:49 +02002905{
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002906 if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
Gleb Natapovc4282df2009-04-21 17:45:07 +03002907 return 0;
Jan Kiszka33f089c2008-09-26 09:30:49 +02002908
Gleb Natapovc4282df2009-04-21 17:45:07 +03002909 return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
Avi Kivity30bd0c42010-11-01 23:20:48 +02002910 (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI
2911 | GUEST_INTR_STATE_NMI));
Jan Kiszka33f089c2008-09-26 09:30:49 +02002912}
2913
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002914static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
2915{
2916 if (!cpu_has_virtual_nmis())
2917 return to_vmx(vcpu)->soft_vnmi_blocked;
Avi Kivityc332c832010-05-04 12:24:12 +03002918 return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002919}
2920
2921static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
2922{
2923 struct vcpu_vmx *vmx = to_vmx(vcpu);
2924
2925 if (!cpu_has_virtual_nmis()) {
2926 if (vmx->soft_vnmi_blocked != masked) {
2927 vmx->soft_vnmi_blocked = masked;
2928 vmx->vnmi_blocked_time = 0;
2929 }
2930 } else {
2931 if (masked)
2932 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
2933 GUEST_INTR_STATE_NMI);
2934 else
2935 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
2936 GUEST_INTR_STATE_NMI);
2937 }
2938}
2939
Gleb Natapov78646122009-03-23 12:12:11 +02002940static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
2941{
Gleb Natapovc4282df2009-04-21 17:45:07 +03002942 return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
2943 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2944 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
Gleb Natapov78646122009-03-23 12:12:11 +02002945}
2946
Izik Eiduscbc94022007-10-25 00:29:55 +02002947static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
2948{
2949 int ret;
2950 struct kvm_userspace_memory_region tss_mem = {
Sheng Yang6fe63972008-10-16 17:30:58 +08002951 .slot = TSS_PRIVATE_MEMSLOT,
Izik Eiduscbc94022007-10-25 00:29:55 +02002952 .guest_phys_addr = addr,
2953 .memory_size = PAGE_SIZE * 3,
2954 .flags = 0,
2955 };
2956
2957 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
2958 if (ret)
2959 return ret;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002960 kvm->arch.tss_addr = addr;
Izik Eiduscbc94022007-10-25 00:29:55 +02002961 return 0;
2962}
2963
Avi Kivity6aa8b732006-12-10 02:21:36 -08002964static int handle_rmode_exception(struct kvm_vcpu *vcpu,
2965 int vec, u32 err_code)
2966{
Nitin A Kambleb3f37702007-05-17 15:50:34 +03002967 /*
2968 * Instruction with address size override prefix opcode 0x67
2969 * Cause the #SS fault with 0 error code in VM86 mode.
2970 */
2971 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Andre Przywara51d8b662010-12-21 11:12:02 +01002972 if (emulate_instruction(vcpu, 0) == EMULATE_DONE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002973 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002974 /*
2975 * Forward all other exceptions that are valid in real mode.
2976 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
2977 * the required debugging infrastructure rework.
2978 */
2979 switch (vec) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002980 case DB_VECTOR:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002981 if (vcpu->guest_debug &
2982 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
2983 return 0;
2984 kvm_queue_exception(vcpu, vec);
2985 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002986 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01002987 /*
2988 * Update instruction length as we may reinject the exception
2989 * from user space while in guest debugging mode.
2990 */
2991 to_vmx(vcpu)->vcpu.arch.event_exit_inst_len =
2992 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002993 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2994 return 0;
2995 /* fall through */
2996 case DE_VECTOR:
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002997 case OF_VECTOR:
2998 case BR_VECTOR:
2999 case UD_VECTOR:
3000 case DF_VECTOR:
3001 case SS_VECTOR:
3002 case GP_VECTOR:
3003 case MF_VECTOR:
3004 kvm_queue_exception(vcpu, vec);
3005 return 1;
3006 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003007 return 0;
3008}
3009
Andi Kleena0861c02009-06-08 17:37:09 +08003010/*
3011 * Trigger machine check on the host. We assume all the MSRs are already set up
3012 * by the CPU and that we still run on the same CPU as the MCE occurred on.
3013 * We pass a fake environment to the machine check handler because we want
3014 * the guest to be always treated like user space, no matter what context
3015 * it used internally.
3016 */
3017static void kvm_machine_check(void)
3018{
3019#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
3020 struct pt_regs regs = {
3021 .cs = 3, /* Fake ring 3 no matter what the guest ran on */
3022 .flags = X86_EFLAGS_IF,
3023 };
3024
3025 do_machine_check(&regs, 0);
3026#endif
3027}
3028
Avi Kivity851ba692009-08-24 11:10:17 +03003029static int handle_machine_check(struct kvm_vcpu *vcpu)
Andi Kleena0861c02009-06-08 17:37:09 +08003030{
3031 /* already handled by vcpu_run */
3032 return 1;
3033}
3034
Avi Kivity851ba692009-08-24 11:10:17 +03003035static int handle_exception(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003036{
Avi Kivity1155f762007-11-22 11:30:47 +02003037 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03003038 struct kvm_run *kvm_run = vcpu->run;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003039 u32 intr_info, ex_no, error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003040 unsigned long cr2, rip, dr6;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003041 u32 vect_info;
3042 enum emulation_result er;
3043
Avi Kivity1155f762007-11-22 11:30:47 +02003044 vect_info = vmx->idt_vectoring_info;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003045 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
3046
Andi Kleena0861c02009-06-08 17:37:09 +08003047 if (is_machine_check(intr_info))
Avi Kivity851ba692009-08-24 11:10:17 +03003048 return handle_machine_check(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003049
Avi Kivity6aa8b732006-12-10 02:21:36 -08003050 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
Avi Kivity65ac7262009-11-04 11:59:01 +02003051 !is_page_fault(intr_info)) {
3052 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3053 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX;
3054 vcpu->run->internal.ndata = 2;
3055 vcpu->run->internal.data[0] = vect_info;
3056 vcpu->run->internal.data[1] = intr_info;
3057 return 0;
3058 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003059
Jan Kiszkae4a41882008-09-26 09:30:46 +02003060 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
Avi Kivity1b6269d2007-10-09 12:12:19 +02003061 return 1; /* already handled by vmx_vcpu_run() */
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003062
3063 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03003064 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003065 return 1;
3066 }
3067
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003068 if (is_invalid_opcode(intr_info)) {
Andre Przywara51d8b662010-12-21 11:12:02 +01003069 er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003070 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02003071 kvm_queue_exception(vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003072 return 1;
3073 }
3074
Avi Kivity6aa8b732006-12-10 02:21:36 -08003075 error_code = 0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003076 rip = kvm_rip_read(vcpu);
Ryan Harper2e113842008-02-11 10:26:38 -06003077 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003078 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
3079 if (is_page_fault(intr_info)) {
Sheng Yang14394422008-04-28 12:24:45 +08003080 /* EPT won't cause page fault directly */
Avi Kivity089d0342009-03-23 18:26:32 +02003081 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08003082 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -08003083 cr2 = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003084 trace_kvm_page_fault(cr2, error_code);
3085
Gleb Natapov3298b752009-05-11 13:35:46 +03003086 if (kvm_event_needs_reinjection(vcpu))
Avi Kivity577bdc42008-07-19 08:57:05 +03003087 kvm_mmu_unprotect_page_virt(vcpu, cr2);
Andre Przywaradc25e892010-12-21 11:12:07 +01003088 return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003089 }
3090
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003091 if (vmx->rmode.vm86_active &&
Avi Kivity6aa8b732006-12-10 02:21:36 -08003092 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003093 error_code)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003094 if (vcpu->arch.halt_request) {
3095 vcpu->arch.halt_request = 0;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003096 return kvm_emulate_halt(vcpu);
3097 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003098 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003099 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003100
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003101 ex_no = intr_info & INTR_INFO_VECTOR_MASK;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003102 switch (ex_no) {
3103 case DB_VECTOR:
3104 dr6 = vmcs_readl(EXIT_QUALIFICATION);
3105 if (!(vcpu->guest_debug &
3106 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
3107 vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
3108 kvm_queue_exception(vcpu, DB_VECTOR);
3109 return 1;
3110 }
3111 kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
3112 kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
3113 /* fall through */
3114 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01003115 /*
3116 * Update instruction length as we may reinject #BP from
3117 * user space while in guest debugging mode. Reading it for
3118 * #DB as well causes no harm, it is not used in that case.
3119 */
3120 vmx->vcpu.arch.event_exit_inst_len =
3121 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003122 kvm_run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003123 kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
3124 kvm_run->debug.arch.exception = ex_no;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003125 break;
3126 default:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003127 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
3128 kvm_run->ex.exception = ex_no;
3129 kvm_run->ex.error_code = error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003130 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003131 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003132 return 0;
3133}
3134
Avi Kivity851ba692009-08-24 11:10:17 +03003135static int handle_external_interrupt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003136{
Avi Kivity1165f5f2007-04-19 17:27:43 +03003137 ++vcpu->stat.irq_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003138 return 1;
3139}
3140
Avi Kivity851ba692009-08-24 11:10:17 +03003141static int handle_triple_fault(struct kvm_vcpu *vcpu)
Avi Kivity988ad742007-02-12 00:54:36 -08003142{
Avi Kivity851ba692009-08-24 11:10:17 +03003143 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Avi Kivity988ad742007-02-12 00:54:36 -08003144 return 0;
3145}
Avi Kivity6aa8b732006-12-10 02:21:36 -08003146
Avi Kivity851ba692009-08-24 11:10:17 +03003147static int handle_io(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003148{
He, Qingbfdaab02007-09-12 14:18:28 +08003149 unsigned long exit_qualification;
Jan Kiszka34c33d12009-02-08 13:28:15 +01003150 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02003151 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003152
He, Qingbfdaab02007-09-12 14:18:28 +08003153 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02003154 string = (exit_qualification & 16) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03003155 in = (exit_qualification & 8) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03003156
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003157 ++vcpu->stat.io_exits;
3158
3159 if (string || in)
Andre Przywara51d8b662010-12-21 11:12:02 +01003160 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003161
3162 port = exit_qualification >> 16;
3163 size = (exit_qualification & 7) + 1;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01003164 skip_emulated_instruction(vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003165
3166 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003167}
3168
Ingo Molnar102d8322007-02-19 14:37:47 +02003169static void
3170vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3171{
3172 /*
3173 * Patch in the VMCALL instruction:
3174 */
3175 hypercall[0] = 0x0f;
3176 hypercall[1] = 0x01;
3177 hypercall[2] = 0xc1;
Ingo Molnar102d8322007-02-19 14:37:47 +02003178}
3179
Avi Kivity851ba692009-08-24 11:10:17 +03003180static int handle_cr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003181{
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003182 unsigned long exit_qualification, val;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003183 int cr;
3184 int reg;
Avi Kivity49a9b072010-06-10 17:02:14 +03003185 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003186
He, Qingbfdaab02007-09-12 14:18:28 +08003187 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003188 cr = exit_qualification & 15;
3189 reg = (exit_qualification >> 8) & 15;
3190 switch ((exit_qualification >> 4) & 3) {
3191 case 0: /* mov to cr */
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003192 val = kvm_register_read(vcpu, reg);
3193 trace_kvm_cr_write(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003194 switch (cr) {
3195 case 0:
Avi Kivity49a9b072010-06-10 17:02:14 +03003196 err = kvm_set_cr0(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003197 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003198 return 1;
3199 case 3:
Avi Kivity23902182010-06-10 17:02:16 +03003200 err = kvm_set_cr3(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003201 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003202 return 1;
3203 case 4:
Avi Kivitya83b29c2010-06-10 17:02:15 +03003204 err = kvm_set_cr4(vcpu, val);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003205 kvm_complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003206 return 1;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003207 case 8: {
3208 u8 cr8_prev = kvm_get_cr8(vcpu);
3209 u8 cr8 = kvm_register_read(vcpu, reg);
Andre Przywaraeea1cff2010-12-21 11:12:00 +01003210 err = kvm_set_cr8(vcpu, cr8);
Andre Przywaradb8fcef2010-12-21 11:12:01 +01003211 kvm_complete_insn_gp(vcpu, err);
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003212 if (irqchip_in_kernel(vcpu->kvm))
3213 return 1;
3214 if (cr8_prev <= cr8)
3215 return 1;
Avi Kivity851ba692009-08-24 11:10:17 +03003216 vcpu->run->exit_reason = KVM_EXIT_SET_TPR;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003217 return 0;
3218 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003219 };
3220 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03003221 case 2: /* clts */
Avi Kivityedcafe32009-12-30 18:07:40 +02003222 vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
Avi Kivity4d4ec082009-12-29 18:07:30 +02003223 trace_kvm_cr_write(0, kvm_read_cr0(vcpu));
Anthony Liguori25c4c272007-04-27 09:29:21 +03003224 skip_emulated_instruction(vcpu);
Avi Kivity6b52d182010-01-21 15:31:47 +02003225 vmx_fpu_activate(vcpu);
Anthony Liguori25c4c272007-04-27 09:29:21 +03003226 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003227 case 1: /*mov from cr*/
3228 switch (cr) {
3229 case 3:
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003230 kvm_register_write(vcpu, reg, vcpu->arch.cr3);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003231 trace_kvm_cr_read(cr, vcpu->arch.cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003232 skip_emulated_instruction(vcpu);
3233 return 1;
3234 case 8:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003235 val = kvm_get_cr8(vcpu);
3236 kvm_register_write(vcpu, reg, val);
3237 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003238 skip_emulated_instruction(vcpu);
3239 return 1;
3240 }
3241 break;
3242 case 3: /* lmsw */
Avi Kivitya1f83a72009-12-29 17:33:58 +02003243 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
Avi Kivity4d4ec082009-12-29 18:07:30 +02003244 trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val);
Avi Kivitya1f83a72009-12-29 17:33:58 +02003245 kvm_lmsw(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003246
3247 skip_emulated_instruction(vcpu);
3248 return 1;
3249 default:
3250 break;
3251 }
Avi Kivity851ba692009-08-24 11:10:17 +03003252 vcpu->run->exit_reason = 0;
Rusty Russellf0242472007-08-01 10:48:02 +10003253 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -08003254 (int)(exit_qualification >> 4) & 3, cr);
3255 return 0;
3256}
3257
Avi Kivity851ba692009-08-24 11:10:17 +03003258static int handle_dr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003259{
He, Qingbfdaab02007-09-12 14:18:28 +08003260 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003261 int dr, reg;
3262
Jan Kiszkaf2483412010-01-20 18:20:20 +01003263 /* Do not handle if the CPL > 0, will trigger GP on re-entry */
Avi Kivity0a79b002009-09-01 12:03:25 +03003264 if (!kvm_require_cpl(vcpu, 0))
3265 return 1;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003266 dr = vmcs_readl(GUEST_DR7);
3267 if (dr & DR7_GD) {
3268 /*
3269 * As the vm-exit takes precedence over the debug trap, we
3270 * need to emulate the latter, either for the host or the
3271 * guest debugging itself.
3272 */
3273 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Avi Kivity851ba692009-08-24 11:10:17 +03003274 vcpu->run->debug.arch.dr6 = vcpu->arch.dr6;
3275 vcpu->run->debug.arch.dr7 = dr;
3276 vcpu->run->debug.arch.pc =
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003277 vmcs_readl(GUEST_CS_BASE) +
3278 vmcs_readl(GUEST_RIP);
Avi Kivity851ba692009-08-24 11:10:17 +03003279 vcpu->run->debug.arch.exception = DB_VECTOR;
3280 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003281 return 0;
3282 } else {
3283 vcpu->arch.dr7 &= ~DR7_GD;
3284 vcpu->arch.dr6 |= DR6_BD;
3285 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
3286 kvm_queue_exception(vcpu, DB_VECTOR);
3287 return 1;
3288 }
3289 }
3290
He, Qingbfdaab02007-09-12 14:18:28 +08003291 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003292 dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
3293 reg = DEBUG_REG_ACCESS_REG(exit_qualification);
3294 if (exit_qualification & TYPE_MOV_FROM_DR) {
Gleb Natapov020df072010-04-13 10:05:23 +03003295 unsigned long val;
3296 if (!kvm_get_dr(vcpu, dr, &val))
3297 kvm_register_write(vcpu, reg, val);
3298 } else
3299 kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003300 skip_emulated_instruction(vcpu);
3301 return 1;
3302}
3303
Gleb Natapov020df072010-04-13 10:05:23 +03003304static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
3305{
3306 vmcs_writel(GUEST_DR7, val);
3307}
3308
Avi Kivity851ba692009-08-24 11:10:17 +03003309static int handle_cpuid(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003310{
Avi Kivity06465c52007-02-28 20:46:53 +02003311 kvm_emulate_cpuid(vcpu);
3312 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003313}
3314
Avi Kivity851ba692009-08-24 11:10:17 +03003315static int handle_rdmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003316{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003317 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08003318 u64 data;
3319
3320 if (vmx_get_msr(vcpu, ecx, &data)) {
Avi Kivity59200272010-01-25 19:47:02 +02003321 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003322 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003323 return 1;
3324 }
3325
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003326 trace_kvm_msr_read(ecx, data);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003327
Avi Kivity6aa8b732006-12-10 02:21:36 -08003328 /* FIXME: handling of bits 32:63 of rax, rdx */
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003329 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
3330 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003331 skip_emulated_instruction(vcpu);
3332 return 1;
3333}
3334
Avi Kivity851ba692009-08-24 11:10:17 +03003335static int handle_wrmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003336{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003337 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
3338 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
3339 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003340
3341 if (vmx_set_msr(vcpu, ecx, data) != 0) {
Avi Kivity59200272010-01-25 19:47:02 +02003342 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003343 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003344 return 1;
3345 }
3346
Avi Kivity59200272010-01-25 19:47:02 +02003347 trace_kvm_msr_write(ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003348 skip_emulated_instruction(vcpu);
3349 return 1;
3350}
3351
Avi Kivity851ba692009-08-24 11:10:17 +03003352static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003353{
Avi Kivity3842d132010-07-27 12:30:24 +03003354 kvm_make_request(KVM_REQ_EVENT, vcpu);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003355 return 1;
3356}
3357
Avi Kivity851ba692009-08-24 11:10:17 +03003358static int handle_interrupt_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003359{
Eddie Dong85f455f2007-07-06 12:20:49 +03003360 u32 cpu_based_vm_exec_control;
3361
3362 /* clear pending irq */
3363 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3364 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
3365 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003366
Avi Kivity3842d132010-07-27 12:30:24 +03003367 kvm_make_request(KVM_REQ_EVENT, vcpu);
3368
Jan Kiszkaa26bf122008-09-26 09:30:45 +02003369 ++vcpu->stat.irq_window_exits;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003370
Dor Laorc1150d82007-01-05 16:36:24 -08003371 /*
3372 * If the user space waits to inject interrupts, exit as soon as
3373 * possible
3374 */
Gleb Natapov80618232009-04-21 17:44:56 +03003375 if (!irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03003376 vcpu->run->request_interrupt_window &&
Gleb Natapov80618232009-04-21 17:44:56 +03003377 !kvm_cpu_has_interrupt(vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003378 vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Dor Laorc1150d82007-01-05 16:36:24 -08003379 return 0;
3380 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003381 return 1;
3382}
3383
Avi Kivity851ba692009-08-24 11:10:17 +03003384static int handle_halt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003385{
3386 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03003387 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003388}
3389
Avi Kivity851ba692009-08-24 11:10:17 +03003390static int handle_vmcall(struct kvm_vcpu *vcpu)
Ingo Molnarc21415e2007-02-19 14:37:47 +02003391{
Dor Laor510043d2007-02-19 18:25:43 +02003392 skip_emulated_instruction(vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003393 kvm_emulate_hypercall(vcpu);
3394 return 1;
Ingo Molnarc21415e2007-02-19 14:37:47 +02003395}
3396
Avi Kivity851ba692009-08-24 11:10:17 +03003397static int handle_vmx_insn(struct kvm_vcpu *vcpu)
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003398{
3399 kvm_queue_exception(vcpu, UD_VECTOR);
3400 return 1;
3401}
3402
Gleb Natapovec25d5e2010-11-01 15:35:01 +02003403static int handle_invd(struct kvm_vcpu *vcpu)
3404{
Andre Przywara51d8b662010-12-21 11:12:02 +01003405 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovec25d5e2010-11-01 15:35:01 +02003406}
3407
Avi Kivity851ba692009-08-24 11:10:17 +03003408static int handle_invlpg(struct kvm_vcpu *vcpu)
Marcelo Tosattia7052892008-09-23 13:18:35 -03003409{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003410 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosattia7052892008-09-23 13:18:35 -03003411
3412 kvm_mmu_invlpg(vcpu, exit_qualification);
3413 skip_emulated_instruction(vcpu);
3414 return 1;
3415}
3416
Avi Kivity851ba692009-08-24 11:10:17 +03003417static int handle_wbinvd(struct kvm_vcpu *vcpu)
Eddie Donge5edaa02007-11-11 12:28:35 +02003418{
3419 skip_emulated_instruction(vcpu);
Sheng Yangf5f48ee2010-06-30 12:25:15 +08003420 kvm_emulate_wbinvd(vcpu);
Eddie Donge5edaa02007-11-11 12:28:35 +02003421 return 1;
3422}
3423
Dexuan Cui2acf9232010-06-10 11:27:12 +08003424static int handle_xsetbv(struct kvm_vcpu *vcpu)
3425{
3426 u64 new_bv = kvm_read_edx_eax(vcpu);
3427 u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
3428
3429 if (kvm_set_xcr(vcpu, index, new_bv) == 0)
3430 skip_emulated_instruction(vcpu);
3431 return 1;
3432}
3433
Avi Kivity851ba692009-08-24 11:10:17 +03003434static int handle_apic_access(struct kvm_vcpu *vcpu)
Sheng Yangf78e0e22007-10-29 09:40:42 +08003435{
Andre Przywara51d8b662010-12-21 11:12:02 +01003436 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Sheng Yangf78e0e22007-10-29 09:40:42 +08003437}
3438
Avi Kivity851ba692009-08-24 11:10:17 +03003439static int handle_task_switch(struct kvm_vcpu *vcpu)
Izik Eidus37817f22008-03-24 23:14:53 +02003440{
Jan Kiszka60637aa2008-09-26 09:30:47 +02003441 struct vcpu_vmx *vmx = to_vmx(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02003442 unsigned long exit_qualification;
Jan Kiszkae269fb22010-04-14 15:51:09 +02003443 bool has_error_code = false;
3444 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02003445 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003446 int reason, type, idt_v;
3447
3448 idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
3449 type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
Izik Eidus37817f22008-03-24 23:14:53 +02003450
3451 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
3452
3453 reason = (u32)exit_qualification >> 30;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003454 if (reason == TASK_SWITCH_GATE && idt_v) {
3455 switch (type) {
3456 case INTR_TYPE_NMI_INTR:
3457 vcpu->arch.nmi_injected = false;
3458 if (cpu_has_virtual_nmis())
3459 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3460 GUEST_INTR_STATE_NMI);
3461 break;
3462 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003463 case INTR_TYPE_SOFT_INTR:
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003464 kvm_clear_interrupt_queue(vcpu);
3465 break;
3466 case INTR_TYPE_HARD_EXCEPTION:
Jan Kiszkae269fb22010-04-14 15:51:09 +02003467 if (vmx->idt_vectoring_info &
3468 VECTORING_INFO_DELIVER_CODE_MASK) {
3469 has_error_code = true;
3470 error_code =
3471 vmcs_read32(IDT_VECTORING_ERROR_CODE);
3472 }
3473 /* fall through */
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003474 case INTR_TYPE_SOFT_EXCEPTION:
3475 kvm_clear_exception_queue(vcpu);
3476 break;
3477 default:
3478 break;
3479 }
Jan Kiszka60637aa2008-09-26 09:30:47 +02003480 }
Izik Eidus37817f22008-03-24 23:14:53 +02003481 tss_selector = exit_qualification;
3482
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003483 if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION &&
3484 type != INTR_TYPE_EXT_INTR &&
3485 type != INTR_TYPE_NMI_INTR))
3486 skip_emulated_instruction(vcpu);
3487
Gleb Natapovacb54512010-04-15 21:03:50 +03003488 if (kvm_task_switch(vcpu, tss_selector, reason,
3489 has_error_code, error_code) == EMULATE_FAIL) {
3490 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3491 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
3492 vcpu->run->internal.ndata = 0;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003493 return 0;
Gleb Natapovacb54512010-04-15 21:03:50 +03003494 }
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003495
3496 /* clear all local breakpoint enable flags */
3497 vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
3498
3499 /*
3500 * TODO: What about debug traps on tss switch?
3501 * Are we supposed to inject them and update dr6?
3502 */
3503
3504 return 1;
Izik Eidus37817f22008-03-24 23:14:53 +02003505}
3506
Avi Kivity851ba692009-08-24 11:10:17 +03003507static int handle_ept_violation(struct kvm_vcpu *vcpu)
Sheng Yang14394422008-04-28 12:24:45 +08003508{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003509 unsigned long exit_qualification;
Sheng Yang14394422008-04-28 12:24:45 +08003510 gpa_t gpa;
Sheng Yang14394422008-04-28 12:24:45 +08003511 int gla_validity;
Sheng Yang14394422008-04-28 12:24:45 +08003512
Sheng Yangf9c617f2009-03-25 10:08:52 +08003513 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Sheng Yang14394422008-04-28 12:24:45 +08003514
3515 if (exit_qualification & (1 << 6)) {
3516 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
Jan Kiszka7f582ab2009-07-22 23:53:01 +02003517 return -EINVAL;
Sheng Yang14394422008-04-28 12:24:45 +08003518 }
3519
3520 gla_validity = (exit_qualification >> 7) & 0x3;
3521 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
3522 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
3523 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
3524 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
Sheng Yangf9c617f2009-03-25 10:08:52 +08003525 vmcs_readl(GUEST_LINEAR_ADDRESS));
Sheng Yang14394422008-04-28 12:24:45 +08003526 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
3527 (long unsigned int)exit_qualification);
Avi Kivity851ba692009-08-24 11:10:17 +03003528 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3529 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION;
Avi Kivity596ae892009-06-03 14:12:10 +03003530 return 0;
Sheng Yang14394422008-04-28 12:24:45 +08003531 }
3532
3533 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003534 trace_kvm_page_fault(gpa, exit_qualification);
Andre Przywaradc25e892010-12-21 11:12:07 +01003535 return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0);
Sheng Yang14394422008-04-28 12:24:45 +08003536}
3537
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003538static u64 ept_rsvd_mask(u64 spte, int level)
3539{
3540 int i;
3541 u64 mask = 0;
3542
3543 for (i = 51; i > boot_cpu_data.x86_phys_bits; i--)
3544 mask |= (1ULL << i);
3545
3546 if (level > 2)
3547 /* bits 7:3 reserved */
3548 mask |= 0xf8;
3549 else if (level == 2) {
3550 if (spte & (1ULL << 7))
3551 /* 2MB ref, bits 20:12 reserved */
3552 mask |= 0x1ff000;
3553 else
3554 /* bits 6:3 reserved */
3555 mask |= 0x78;
3556 }
3557
3558 return mask;
3559}
3560
3561static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte,
3562 int level)
3563{
3564 printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level);
3565
3566 /* 010b (write-only) */
3567 WARN_ON((spte & 0x7) == 0x2);
3568
3569 /* 110b (write/execute) */
3570 WARN_ON((spte & 0x7) == 0x6);
3571
3572 /* 100b (execute-only) and value not supported by logical processor */
3573 if (!cpu_has_vmx_ept_execute_only())
3574 WARN_ON((spte & 0x7) == 0x4);
3575
3576 /* not 000b */
3577 if ((spte & 0x7)) {
3578 u64 rsvd_bits = spte & ept_rsvd_mask(spte, level);
3579
3580 if (rsvd_bits != 0) {
3581 printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n",
3582 __func__, rsvd_bits);
3583 WARN_ON(1);
3584 }
3585
3586 if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) {
3587 u64 ept_mem_type = (spte & 0x38) >> 3;
3588
3589 if (ept_mem_type == 2 || ept_mem_type == 3 ||
3590 ept_mem_type == 7) {
3591 printk(KERN_ERR "%s: ept_mem_type=0x%llx\n",
3592 __func__, ept_mem_type);
3593 WARN_ON(1);
3594 }
3595 }
3596 }
3597}
3598
Avi Kivity851ba692009-08-24 11:10:17 +03003599static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003600{
3601 u64 sptes[4];
3602 int nr_sptes, i;
3603 gpa_t gpa;
3604
3605 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
3606
3607 printk(KERN_ERR "EPT: Misconfiguration.\n");
3608 printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa);
3609
3610 nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes);
3611
3612 for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i)
3613 ept_misconfig_inspect_spte(vcpu, sptes[i-1], i);
3614
Avi Kivity851ba692009-08-24 11:10:17 +03003615 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3616 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003617
3618 return 0;
3619}
3620
Avi Kivity851ba692009-08-24 11:10:17 +03003621static int handle_nmi_window(struct kvm_vcpu *vcpu)
Sheng Yangf08864b2008-05-15 18:23:25 +08003622{
3623 u32 cpu_based_vm_exec_control;
3624
3625 /* clear pending NMI */
3626 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3627 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
3628 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
3629 ++vcpu->stat.nmi_window_exits;
Avi Kivity3842d132010-07-27 12:30:24 +03003630 kvm_make_request(KVM_REQ_EVENT, vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08003631
3632 return 1;
3633}
3634
Mohammed Gamal80ced182009-09-01 12:48:18 +02003635static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003636{
Avi Kivity8b3079a2009-01-05 12:10:54 +02003637 struct vcpu_vmx *vmx = to_vmx(vcpu);
3638 enum emulation_result err = EMULATE_DONE;
Mohammed Gamal80ced182009-09-01 12:48:18 +02003639 int ret = 1;
Avi Kivity49e9d552010-09-19 14:34:08 +02003640 u32 cpu_exec_ctrl;
3641 bool intr_window_requested;
3642
3643 cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3644 intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003645
3646 while (!guest_state_valid(vcpu)) {
Avi Kivity49e9d552010-09-19 14:34:08 +02003647 if (intr_window_requested
3648 && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF))
3649 return handle_interrupt_window(&vmx->vcpu);
3650
Andre Przywara51d8b662010-12-21 11:12:02 +01003651 err = emulate_instruction(vcpu, 0);
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003652
Mohammed Gamal80ced182009-09-01 12:48:18 +02003653 if (err == EMULATE_DO_MMIO) {
3654 ret = 0;
3655 goto out;
3656 }
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003657
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03003658 if (err != EMULATE_DONE)
3659 return 0;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003660
3661 if (signal_pending(current))
Mohammed Gamal80ced182009-09-01 12:48:18 +02003662 goto out;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003663 if (need_resched())
3664 schedule();
3665 }
3666
Mohammed Gamal80ced182009-09-01 12:48:18 +02003667 vmx->emulation_required = 0;
3668out:
3669 return ret;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003670}
3671
Avi Kivity6aa8b732006-12-10 02:21:36 -08003672/*
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003673 * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE
3674 * exiting, so only get here on cpu with PAUSE-Loop-Exiting.
3675 */
Marcelo Tosatti9fb41ba2009-10-12 19:37:31 -03003676static int handle_pause(struct kvm_vcpu *vcpu)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003677{
3678 skip_emulated_instruction(vcpu);
3679 kvm_vcpu_on_spin(vcpu);
3680
3681 return 1;
3682}
3683
Sheng Yang59708672009-12-15 13:29:54 +08003684static int handle_invalid_op(struct kvm_vcpu *vcpu)
3685{
3686 kvm_queue_exception(vcpu, UD_VECTOR);
3687 return 1;
3688}
3689
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003690/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08003691 * The exit handlers return 1 if the exit was handled fully and guest execution
3692 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
3693 * to be done to userspace and return 0.
3694 */
Avi Kivity851ba692009-08-24 11:10:17 +03003695static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08003696 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
3697 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08003698 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Sheng Yangf08864b2008-05-15 18:23:25 +08003699 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003700 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003701 [EXIT_REASON_CR_ACCESS] = handle_cr,
3702 [EXIT_REASON_DR_ACCESS] = handle_dr,
3703 [EXIT_REASON_CPUID] = handle_cpuid,
3704 [EXIT_REASON_MSR_READ] = handle_rdmsr,
3705 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
3706 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
3707 [EXIT_REASON_HLT] = handle_halt,
Gleb Natapovec25d5e2010-11-01 15:35:01 +02003708 [EXIT_REASON_INVD] = handle_invd,
Marcelo Tosattia7052892008-09-23 13:18:35 -03003709 [EXIT_REASON_INVLPG] = handle_invlpg,
Ingo Molnarc21415e2007-02-19 14:37:47 +02003710 [EXIT_REASON_VMCALL] = handle_vmcall,
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003711 [EXIT_REASON_VMCLEAR] = handle_vmx_insn,
3712 [EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
3713 [EXIT_REASON_VMPTRLD] = handle_vmx_insn,
3714 [EXIT_REASON_VMPTRST] = handle_vmx_insn,
3715 [EXIT_REASON_VMREAD] = handle_vmx_insn,
3716 [EXIT_REASON_VMRESUME] = handle_vmx_insn,
3717 [EXIT_REASON_VMWRITE] = handle_vmx_insn,
3718 [EXIT_REASON_VMOFF] = handle_vmx_insn,
3719 [EXIT_REASON_VMON] = handle_vmx_insn,
Sheng Yangf78e0e22007-10-29 09:40:42 +08003720 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
3721 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
Eddie Donge5edaa02007-11-11 12:28:35 +02003722 [EXIT_REASON_WBINVD] = handle_wbinvd,
Dexuan Cui2acf9232010-06-10 11:27:12 +08003723 [EXIT_REASON_XSETBV] = handle_xsetbv,
Izik Eidus37817f22008-03-24 23:14:53 +02003724 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
Andi Kleena0861c02009-06-08 17:37:09 +08003725 [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check,
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003726 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
3727 [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig,
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003728 [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause,
Sheng Yang59708672009-12-15 13:29:54 +08003729 [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op,
3730 [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003731};
3732
3733static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04003734 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003735
Avi Kivity586f9602010-11-18 13:09:54 +02003736static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
3737{
3738 *info1 = vmcs_readl(EXIT_QUALIFICATION);
3739 *info2 = vmcs_read32(VM_EXIT_INTR_INFO);
3740}
3741
Avi Kivity6aa8b732006-12-10 02:21:36 -08003742/*
3743 * The guest has exited. See if we can fix it or if we need userspace
3744 * assistance.
3745 */
Avi Kivity851ba692009-08-24 11:10:17 +03003746static int vmx_handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003747{
Avi Kivity29bd8a72007-09-10 17:27:03 +03003748 struct vcpu_vmx *vmx = to_vmx(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003749 u32 exit_reason = vmx->exit_reason;
Avi Kivity1155f762007-11-22 11:30:47 +02003750 u32 vectoring_info = vmx->idt_vectoring_info;
Avi Kivity29bd8a72007-09-10 17:27:03 +03003751
Avi Kivityaa179112010-11-17 18:44:19 +02003752 trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003753
Mohammed Gamal80ced182009-09-01 12:48:18 +02003754 /* If guest state is invalid, start emulating */
3755 if (vmx->emulation_required && emulate_invalid_guest_state)
3756 return handle_invalid_guest_state(vcpu);
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003757
Sheng Yang14394422008-04-28 12:24:45 +08003758 /* Access CR3 don't cause VMExit in paging mode, so we need
3759 * to sync with guest real CR3. */
Avi Kivity6de4f3a2009-05-31 22:58:47 +03003760 if (enable_ept && is_paging(vcpu))
Sheng Yang14394422008-04-28 12:24:45 +08003761 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
Sheng Yang14394422008-04-28 12:24:45 +08003762
Mohammed Gamal51207022010-05-31 22:40:54 +03003763 if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) {
3764 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3765 vcpu->run->fail_entry.hardware_entry_failure_reason
3766 = exit_reason;
3767 return 0;
3768 }
3769
Avi Kivity29bd8a72007-09-10 17:27:03 +03003770 if (unlikely(vmx->fail)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003771 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3772 vcpu->run->fail_entry.hardware_entry_failure_reason
Avi Kivity29bd8a72007-09-10 17:27:03 +03003773 = vmcs_read32(VM_INSTRUCTION_ERROR);
3774 return 0;
3775 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003776
Mike Dayd77c26f2007-10-08 09:02:08 -04003777 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
Sheng Yang14394422008-04-28 12:24:45 +08003778 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
Jan Kiszka60637aa2008-09-26 09:30:47 +02003779 exit_reason != EXIT_REASON_EPT_VIOLATION &&
3780 exit_reason != EXIT_REASON_TASK_SWITCH))
3781 printk(KERN_WARNING "%s: unexpected, valid vectoring info "
3782 "(0x%x) and exit reason is 0x%x\n",
3783 __func__, vectoring_info, exit_reason);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003784
3785 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) {
Gleb Natapovc4282df2009-04-21 17:45:07 +03003786 if (vmx_interrupt_allowed(vcpu)) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003787 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003788 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
Jan Kiszka45312202008-12-11 16:54:54 +01003789 vcpu->arch.nmi_pending) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003790 /*
3791 * This CPU don't support us in finding the end of an
3792 * NMI-blocked window if the guest runs with IRQs
3793 * disabled. So we pull the trigger after 1 s of
3794 * futile waiting, but inform the user about this.
3795 */
3796 printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
3797 "state on VCPU %d after 1 s timeout\n",
3798 __func__, vcpu->vcpu_id);
3799 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003800 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003801 }
3802
Avi Kivity6aa8b732006-12-10 02:21:36 -08003803 if (exit_reason < kvm_vmx_max_exit_handlers
3804 && kvm_vmx_exit_handlers[exit_reason])
Avi Kivity851ba692009-08-24 11:10:17 +03003805 return kvm_vmx_exit_handlers[exit_reason](vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003806 else {
Avi Kivity851ba692009-08-24 11:10:17 +03003807 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3808 vcpu->run->hw.hardware_exit_reason = exit_reason;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003809 }
3810 return 0;
3811}
3812
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003813static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003814{
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003815 if (irr == -1 || tpr < irr) {
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003816 vmcs_write32(TPR_THRESHOLD, 0);
3817 return;
3818 }
3819
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003820 vmcs_write32(TPR_THRESHOLD, irr);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003821}
3822
Avi Kivity51aa01d2010-07-20 14:31:20 +03003823static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
Avi Kivitycf393f72008-07-01 16:20:21 +03003824{
Avi Kivity51aa01d2010-07-20 14:31:20 +03003825 u32 exit_intr_info = vmx->exit_intr_info;
Andi Kleena0861c02009-06-08 17:37:09 +08003826
3827 /* Handle machine checks before interrupts are enabled */
3828 if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY)
3829 || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI
3830 && is_machine_check(exit_intr_info)))
3831 kvm_machine_check();
3832
Gleb Natapov20f65982009-05-11 13:35:55 +03003833 /* We need to handle NMIs before interrupts are enabled */
3834 if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003835 (exit_intr_info & INTR_INFO_VALID_MASK)) {
3836 kvm_before_handle_nmi(&vmx->vcpu);
Gleb Natapov20f65982009-05-11 13:35:55 +03003837 asm("int $2");
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003838 kvm_after_handle_nmi(&vmx->vcpu);
3839 }
Avi Kivity51aa01d2010-07-20 14:31:20 +03003840}
Gleb Natapov20f65982009-05-11 13:35:55 +03003841
Avi Kivity51aa01d2010-07-20 14:31:20 +03003842static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx)
3843{
3844 u32 exit_intr_info = vmx->exit_intr_info;
3845 bool unblock_nmi;
3846 u8 vector;
3847 bool idtv_info_valid;
3848
3849 idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Gleb Natapov20f65982009-05-11 13:35:55 +03003850
Avi Kivitycf393f72008-07-01 16:20:21 +03003851 if (cpu_has_virtual_nmis()) {
3852 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
3853 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
3854 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003855 * SDM 3: 27.7.1.2 (September 2008)
Avi Kivitycf393f72008-07-01 16:20:21 +03003856 * Re-set bit "block by NMI" before VM entry if vmexit caused by
3857 * a guest IRET fault.
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003858 * SDM 3: 23.2.2 (September 2008)
3859 * Bit 12 is undefined in any of the following cases:
3860 * If the VM exit sets the valid bit in the IDT-vectoring
3861 * information field.
3862 * If the VM exit is due to a double fault.
Avi Kivitycf393f72008-07-01 16:20:21 +03003863 */
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003864 if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi &&
3865 vector != DF_VECTOR && !idtv_info_valid)
Avi Kivitycf393f72008-07-01 16:20:21 +03003866 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3867 GUEST_INTR_STATE_NMI);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003868 } else if (unlikely(vmx->soft_vnmi_blocked))
3869 vmx->vnmi_blocked_time +=
3870 ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
Avi Kivity51aa01d2010-07-20 14:31:20 +03003871}
3872
Avi Kivity83422e12010-07-20 14:43:23 +03003873static void __vmx_complete_interrupts(struct vcpu_vmx *vmx,
3874 u32 idt_vectoring_info,
3875 int instr_len_field,
3876 int error_code_field)
Avi Kivity51aa01d2010-07-20 14:31:20 +03003877{
Avi Kivity51aa01d2010-07-20 14:31:20 +03003878 u8 vector;
3879 int type;
3880 bool idtv_info_valid;
3881
3882 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Avi Kivity668f6122008-07-02 09:28:55 +03003883
Gleb Natapov37b96e92009-03-30 16:03:13 +03003884 vmx->vcpu.arch.nmi_injected = false;
3885 kvm_clear_exception_queue(&vmx->vcpu);
3886 kvm_clear_interrupt_queue(&vmx->vcpu);
3887
3888 if (!idtv_info_valid)
3889 return;
3890
Avi Kivity3842d132010-07-27 12:30:24 +03003891 kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu);
3892
Avi Kivity668f6122008-07-02 09:28:55 +03003893 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
3894 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003895
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003896 switch (type) {
Gleb Natapov37b96e92009-03-30 16:03:13 +03003897 case INTR_TYPE_NMI_INTR:
3898 vmx->vcpu.arch.nmi_injected = true;
Avi Kivity668f6122008-07-02 09:28:55 +03003899 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003900 * SDM 3: 27.7.1.2 (September 2008)
Gleb Natapov37b96e92009-03-30 16:03:13 +03003901 * Clear bit "block by NMI" before VM entry if a NMI
3902 * delivery faulted.
Avi Kivity668f6122008-07-02 09:28:55 +03003903 */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003904 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
3905 GUEST_INTR_STATE_NMI);
3906 break;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003907 case INTR_TYPE_SOFT_EXCEPTION:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003908 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03003909 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003910 /* fall through */
3911 case INTR_TYPE_HARD_EXCEPTION:
Avi Kivity35920a32008-07-03 14:50:12 +03003912 if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
Avi Kivity83422e12010-07-20 14:43:23 +03003913 u32 err = vmcs_read32(error_code_field);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003914 kvm_queue_exception_e(&vmx->vcpu, vector, err);
Avi Kivity35920a32008-07-03 14:50:12 +03003915 } else
3916 kvm_queue_exception(&vmx->vcpu, vector);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003917 break;
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003918 case INTR_TYPE_SOFT_INTR:
3919 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03003920 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003921 /* fall through */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003922 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003923 kvm_queue_interrupt(&vmx->vcpu, vector,
3924 type == INTR_TYPE_SOFT_INTR);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003925 break;
3926 default:
3927 break;
Avi Kivityf7d92382008-07-03 16:14:28 +03003928 }
Avi Kivitycf393f72008-07-01 16:20:21 +03003929}
3930
Avi Kivity83422e12010-07-20 14:43:23 +03003931static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
3932{
3933 __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info,
3934 VM_EXIT_INSTRUCTION_LEN,
3935 IDT_VECTORING_ERROR_CODE);
3936}
3937
Avi Kivityb463a6f2010-07-20 15:06:17 +03003938static void vmx_cancel_injection(struct kvm_vcpu *vcpu)
3939{
3940 __vmx_complete_interrupts(to_vmx(vcpu),
3941 vmcs_read32(VM_ENTRY_INTR_INFO_FIELD),
3942 VM_ENTRY_INSTRUCTION_LEN,
3943 VM_ENTRY_EXCEPTION_ERROR_CODE);
3944
3945 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
3946}
3947
Avi Kivityc8019492008-07-14 14:44:59 +03003948#ifdef CONFIG_X86_64
3949#define R "r"
3950#define Q "q"
3951#else
3952#define R "e"
3953#define Q "l"
3954#endif
3955
Avi Kivity104f2262010-11-18 13:12:52 +02003956static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003957{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003958 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity104f2262010-11-18 13:12:52 +02003959
3960 /* Record the guest's net vcpu time for enforced NMI injections. */
3961 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
3962 vmx->entry_time = ktime_get();
3963
3964 /* Don't enter VMX if guest state is invalid, let the exit handler
3965 start emulation until we arrive back to a valid state */
3966 if (vmx->emulation_required && emulate_invalid_guest_state)
3967 return;
3968
3969 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
3970 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
3971 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
3972 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
3973
3974 /* When single-stepping over STI and MOV SS, we must clear the
3975 * corresponding interruptibility bits in the guest state. Otherwise
3976 * vmentry fails as it then expects bit 14 (BS) in pending debug
3977 * exceptions being set, but that's not correct for the guest debugging
3978 * case. */
3979 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
3980 vmx_set_interrupt_shadow(vcpu, 0);
3981
3982 asm(
Avi Kivity6aa8b732006-12-10 02:21:36 -08003983 /* Store host registers */
Avi Kivityc8019492008-07-14 14:44:59 +03003984 "push %%"R"dx; push %%"R"bp;"
3985 "push %%"R"cx \n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03003986 "cmp %%"R"sp, %c[host_rsp](%0) \n\t"
3987 "je 1f \n\t"
3988 "mov %%"R"sp, %c[host_rsp](%0) \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003989 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03003990 "1: \n\t"
Avi Kivityd3edefc2009-06-16 12:33:56 +03003991 /* Reload cr2 if changed */
3992 "mov %c[cr2](%0), %%"R"ax \n\t"
3993 "mov %%cr2, %%"R"dx \n\t"
3994 "cmp %%"R"ax, %%"R"dx \n\t"
3995 "je 2f \n\t"
3996 "mov %%"R"ax, %%cr2 \n\t"
3997 "2: \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003998 /* Check if vmlaunch of vmresume is needed */
Avi Kivitye08aa782007-11-15 18:06:18 +02003999 "cmpl $0, %c[launched](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004000 /* Load guest registers. Don't clobber flags. */
Avi Kivityc8019492008-07-14 14:44:59 +03004001 "mov %c[rax](%0), %%"R"ax \n\t"
4002 "mov %c[rbx](%0), %%"R"bx \n\t"
4003 "mov %c[rdx](%0), %%"R"dx \n\t"
4004 "mov %c[rsi](%0), %%"R"si \n\t"
4005 "mov %c[rdi](%0), %%"R"di \n\t"
4006 "mov %c[rbp](%0), %%"R"bp \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08004007#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02004008 "mov %c[r8](%0), %%r8 \n\t"
4009 "mov %c[r9](%0), %%r9 \n\t"
4010 "mov %c[r10](%0), %%r10 \n\t"
4011 "mov %c[r11](%0), %%r11 \n\t"
4012 "mov %c[r12](%0), %%r12 \n\t"
4013 "mov %c[r13](%0), %%r13 \n\t"
4014 "mov %c[r14](%0), %%r14 \n\t"
4015 "mov %c[r15](%0), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004016#endif
Avi Kivityc8019492008-07-14 14:44:59 +03004017 "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
4018
Avi Kivity6aa8b732006-12-10 02:21:36 -08004019 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03004020 "jne .Llaunched \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03004021 __ex(ASM_VMX_VMLAUNCH) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03004022 "jmp .Lkvm_vmx_return \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03004023 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03004024 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08004025 /* Save guest registers, load host registers, keep flags */
Avi Kivityc8019492008-07-14 14:44:59 +03004026 "xchg %0, (%%"R"sp) \n\t"
4027 "mov %%"R"ax, %c[rax](%0) \n\t"
4028 "mov %%"R"bx, %c[rbx](%0) \n\t"
4029 "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
4030 "mov %%"R"dx, %c[rdx](%0) \n\t"
4031 "mov %%"R"si, %c[rsi](%0) \n\t"
4032 "mov %%"R"di, %c[rdi](%0) \n\t"
4033 "mov %%"R"bp, %c[rbp](%0) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08004034#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02004035 "mov %%r8, %c[r8](%0) \n\t"
4036 "mov %%r9, %c[r9](%0) \n\t"
4037 "mov %%r10, %c[r10](%0) \n\t"
4038 "mov %%r11, %c[r11](%0) \n\t"
4039 "mov %%r12, %c[r12](%0) \n\t"
4040 "mov %%r13, %c[r13](%0) \n\t"
4041 "mov %%r14, %c[r14](%0) \n\t"
4042 "mov %%r15, %c[r15](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08004043#endif
Avi Kivityc8019492008-07-14 14:44:59 +03004044 "mov %%cr2, %%"R"ax \n\t"
4045 "mov %%"R"ax, %c[cr2](%0) \n\t"
4046
4047 "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02004048 "setbe %c[fail](%0) \n\t"
4049 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
4050 [launched]"i"(offsetof(struct vcpu_vmx, launched)),
4051 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
Avi Kivity313dbd42008-07-17 18:04:30 +03004052 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004053 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
4054 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
4055 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
4056 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
4057 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
4058 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
4059 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08004060#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004061 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
4062 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
4063 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
4064 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
4065 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
4066 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
4067 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
4068 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
Avi Kivity6aa8b732006-12-10 02:21:36 -08004069#endif
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004070 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
Laurent Vivierc2036302007-10-25 14:18:52 +02004071 : "cc", "memory"
Jan Kiszka07d6f552010-09-28 16:37:42 +02004072 , R"ax", R"bx", R"di", R"si"
Laurent Vivierc2036302007-10-25 14:18:52 +02004073#ifdef CONFIG_X86_64
Laurent Vivierc2036302007-10-25 14:18:52 +02004074 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
4075#endif
4076 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08004077
Avi Kivity6de4f3a2009-05-31 22:58:47 +03004078 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
4079 | (1 << VCPU_EXREG_PDPTR));
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004080 vcpu->arch.regs_dirty = 0;
4081
Avi Kivity1155f762007-11-22 11:30:47 +02004082 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
4083
Mike Dayd77c26f2007-10-08 09:02:08 -04004084 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Avi Kivity15ad7142007-07-11 18:17:21 +03004085 vmx->launched = 1;
Avi Kivity1b6269d2007-10-09 12:12:19 +02004086
Avi Kivity51aa01d2010-07-20 14:31:20 +03004087 vmx->exit_reason = vmcs_read32(VM_EXIT_REASON);
4088 vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
4089
4090 vmx_complete_atomic_exit(vmx);
4091 vmx_recover_nmi_blocking(vmx);
Avi Kivitycf393f72008-07-01 16:20:21 +03004092 vmx_complete_interrupts(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004093}
4094
Avi Kivityc8019492008-07-14 14:44:59 +03004095#undef R
4096#undef Q
4097
Avi Kivity6aa8b732006-12-10 02:21:36 -08004098static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
4099{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004100 struct vcpu_vmx *vmx = to_vmx(vcpu);
4101
4102 if (vmx->vmcs) {
Avi Kivity543e4242008-05-13 16:22:47 +03004103 vcpu_clear(vmx);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004104 free_vmcs(vmx->vmcs);
4105 vmx->vmcs = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004106 }
4107}
4108
4109static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
4110{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004111 struct vcpu_vmx *vmx = to_vmx(vcpu);
4112
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08004113 free_vpid(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004114 vmx_free_vmcs(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004115 kfree(vmx->guest_msrs);
4116 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10004117 kmem_cache_free(kvm_vcpu_cache, vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004118}
4119
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08004120static inline void vmcs_init(struct vmcs *vmcs)
4121{
4122 u64 phys_addr = __pa(per_cpu(vmxarea, raw_smp_processor_id()));
4123
4124 if (!vmm_exclusive)
4125 kvm_cpu_vmxon(phys_addr);
4126
4127 vmcs_clear(vmcs);
4128
4129 if (!vmm_exclusive)
4130 kvm_cpu_vmxoff();
4131}
4132
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004133static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004134{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004135 int err;
Rusty Russellc16f8622007-07-30 21:12:19 +10004136 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Avi Kivity15ad7142007-07-11 18:17:21 +03004137 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004138
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004139 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004140 return ERR_PTR(-ENOMEM);
4141
Sheng Yang2384d2b2008-01-17 15:14:33 +08004142 allocate_vpid(vmx);
4143
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004144 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
4145 if (err)
4146 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004147
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004148 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004149 if (!vmx->guest_msrs) {
4150 err = -ENOMEM;
4151 goto uninit_vcpu;
4152 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08004153
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004154 vmx->vmcs = alloc_vmcs();
4155 if (!vmx->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004156 goto free_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004157
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08004158 vmcs_init(vmx->vmcs);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004159
Avi Kivity15ad7142007-07-11 18:17:21 +03004160 cpu = get_cpu();
4161 vmx_vcpu_load(&vmx->vcpu, cpu);
Zachary Amsdene48672f2010-08-19 22:07:23 -10004162 vmx->vcpu.cpu = cpu;
Rusty Russell8b9cf982007-07-30 16:31:43 +10004163 err = vmx_vcpu_setup(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004164 vmx_vcpu_put(&vmx->vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03004165 put_cpu();
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004166 if (err)
4167 goto free_vmcs;
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02004168 if (vm_need_virtualize_apic_accesses(kvm))
4169 if (alloc_apic_access_page(kvm) != 0)
4170 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004171
Sheng Yangb927a3c2009-07-21 10:42:48 +08004172 if (enable_ept) {
4173 if (!kvm->arch.ept_identity_map_addr)
4174 kvm->arch.ept_identity_map_addr =
4175 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08004176 if (alloc_identity_pagetable(kvm) != 0)
4177 goto free_vmcs;
Sheng Yangb927a3c2009-07-21 10:42:48 +08004178 }
Sheng Yangb7ebfb02008-04-25 21:44:52 +08004179
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004180 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004181
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004182free_vmcs:
4183 free_vmcs(vmx->vmcs);
4184free_msrs:
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004185 kfree(vmx->guest_msrs);
4186uninit_vcpu:
4187 kvm_vcpu_uninit(&vmx->vcpu);
4188free_vcpu:
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08004189 free_vpid(vmx);
Rusty Russella4770342007-08-01 14:46:11 +10004190 kmem_cache_free(kvm_vcpu_cache, vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004191 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004192}
4193
Yang, Sheng002c7f72007-07-31 14:23:01 +03004194static void __init vmx_check_processor_compat(void *rtn)
4195{
4196 struct vmcs_config vmcs_conf;
4197
4198 *(int *)rtn = 0;
4199 if (setup_vmcs_config(&vmcs_conf) < 0)
4200 *(int *)rtn = -EIO;
4201 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
4202 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
4203 smp_processor_id());
4204 *(int *)rtn = -EIO;
4205 }
4206}
4207
Sheng Yang67253af2008-04-25 10:20:22 +08004208static int get_ept_level(void)
4209{
4210 return VMX_EPT_DEFAULT_GAW + 1;
4211}
4212
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004213static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08004214{
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004215 u64 ret;
4216
Sheng Yang522c68c2009-04-27 20:35:43 +08004217 /* For VT-d and EPT combination
4218 * 1. MMIO: always map as UC
4219 * 2. EPT with VT-d:
4220 * a. VT-d without snooping control feature: can't guarantee the
4221 * result, try to trust guest.
4222 * b. VT-d with snooping control feature: snooping control feature of
4223 * VT-d engine can guarantee the cache correctness. Just set it
4224 * to WB to keep consistent with host. So the same as item 3.
Sheng Yanga19a6d12010-02-09 16:41:53 +08004225 * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep
Sheng Yang522c68c2009-04-27 20:35:43 +08004226 * consistent with host MTRR
4227 */
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004228 if (is_mmio)
4229 ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang522c68c2009-04-27 20:35:43 +08004230 else if (vcpu->kvm->arch.iommu_domain &&
4231 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
4232 ret = kvm_get_guest_memory_type(vcpu, gfn) <<
4233 VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004234 else
Sheng Yang522c68c2009-04-27 20:35:43 +08004235 ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
Sheng Yanga19a6d12010-02-09 16:41:53 +08004236 | VMX_EPT_IPAT_BIT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004237
4238 return ret;
Sheng Yang64d4d522008-10-09 16:01:57 +08004239}
4240
Avi Kivityf4c9e872009-12-28 16:06:35 +02004241#define _ER(x) { EXIT_REASON_##x, #x }
4242
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004243static const struct trace_print_flags vmx_exit_reasons_str[] = {
Avi Kivityf4c9e872009-12-28 16:06:35 +02004244 _ER(EXCEPTION_NMI),
4245 _ER(EXTERNAL_INTERRUPT),
4246 _ER(TRIPLE_FAULT),
4247 _ER(PENDING_INTERRUPT),
4248 _ER(NMI_WINDOW),
4249 _ER(TASK_SWITCH),
4250 _ER(CPUID),
4251 _ER(HLT),
4252 _ER(INVLPG),
4253 _ER(RDPMC),
4254 _ER(RDTSC),
4255 _ER(VMCALL),
4256 _ER(VMCLEAR),
4257 _ER(VMLAUNCH),
4258 _ER(VMPTRLD),
4259 _ER(VMPTRST),
4260 _ER(VMREAD),
4261 _ER(VMRESUME),
4262 _ER(VMWRITE),
4263 _ER(VMOFF),
4264 _ER(VMON),
4265 _ER(CR_ACCESS),
4266 _ER(DR_ACCESS),
4267 _ER(IO_INSTRUCTION),
4268 _ER(MSR_READ),
4269 _ER(MSR_WRITE),
4270 _ER(MWAIT_INSTRUCTION),
4271 _ER(MONITOR_INSTRUCTION),
4272 _ER(PAUSE_INSTRUCTION),
4273 _ER(MCE_DURING_VMENTRY),
4274 _ER(TPR_BELOW_THRESHOLD),
4275 _ER(APIC_ACCESS),
4276 _ER(EPT_VIOLATION),
4277 _ER(EPT_MISCONFIG),
4278 _ER(WBINVD),
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004279 { -1, NULL }
4280};
4281
Avi Kivityf4c9e872009-12-28 16:06:35 +02004282#undef _ER
4283
Sheng Yang17cc3932010-01-05 19:02:27 +08004284static int vmx_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02004285{
Sheng Yang878403b2010-01-05 19:02:29 +08004286 if (enable_ept && !cpu_has_vmx_ept_1g_page())
4287 return PT_DIRECTORY_LEVEL;
4288 else
4289 /* For shadow and EPT supported 1GB page */
4290 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02004291}
4292
Sheng Yang0e851882009-12-18 16:48:46 +08004293static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
4294{
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004295 struct kvm_cpuid_entry2 *best;
4296 struct vcpu_vmx *vmx = to_vmx(vcpu);
4297 u32 exec_control;
4298
4299 vmx->rdtscp_enabled = false;
4300 if (vmx_rdtscp_supported()) {
4301 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
4302 if (exec_control & SECONDARY_EXEC_RDTSCP) {
4303 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
4304 if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
4305 vmx->rdtscp_enabled = true;
4306 else {
4307 exec_control &= ~SECONDARY_EXEC_RDTSCP;
4308 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
4309 exec_control);
4310 }
4311 }
4312 }
Sheng Yang0e851882009-12-18 16:48:46 +08004313}
4314
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004315static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
4316{
4317}
4318
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03004319static struct kvm_x86_ops vmx_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004320 .cpu_has_kvm_support = cpu_has_kvm_support,
4321 .disabled_by_bios = vmx_disabled_by_bios,
4322 .hardware_setup = hardware_setup,
4323 .hardware_unsetup = hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03004324 .check_processor_compatibility = vmx_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004325 .hardware_enable = hardware_enable,
4326 .hardware_disable = hardware_disable,
Sheng Yang04547152009-04-01 15:52:31 +08004327 .cpu_has_accelerated_tpr = report_flexpriority,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004328
4329 .vcpu_create = vmx_create_vcpu,
4330 .vcpu_free = vmx_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004331 .vcpu_reset = vmx_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004332
Avi Kivity04d2cc72007-09-10 18:10:54 +03004333 .prepare_guest_switch = vmx_save_host_state,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004334 .vcpu_load = vmx_vcpu_load,
4335 .vcpu_put = vmx_vcpu_put,
4336
4337 .set_guest_debug = set_guest_debug,
4338 .get_msr = vmx_get_msr,
4339 .set_msr = vmx_set_msr,
4340 .get_segment_base = vmx_get_segment_base,
4341 .get_segment = vmx_get_segment,
4342 .set_segment = vmx_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02004343 .get_cpl = vmx_get_cpl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004344 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02004345 .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
Anthony Liguori25c4c272007-04-27 09:29:21 +03004346 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004347 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004348 .set_cr3 = vmx_set_cr3,
4349 .set_cr4 = vmx_set_cr4,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004350 .set_efer = vmx_set_efer,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004351 .get_idt = vmx_get_idt,
4352 .set_idt = vmx_set_idt,
4353 .get_gdt = vmx_get_gdt,
4354 .set_gdt = vmx_set_gdt,
Gleb Natapov020df072010-04-13 10:05:23 +03004355 .set_dr7 = vmx_set_dr7,
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004356 .cache_reg = vmx_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004357 .get_rflags = vmx_get_rflags,
4358 .set_rflags = vmx_set_rflags,
Avi Kivityebcbab42010-02-07 11:56:52 +02004359 .fpu_activate = vmx_fpu_activate,
Avi Kivity02daab22009-12-30 12:40:26 +02004360 .fpu_deactivate = vmx_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004361
4362 .tlb_flush = vmx_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004363
Avi Kivity6aa8b732006-12-10 02:21:36 -08004364 .run = vmx_vcpu_run,
Avi Kivity6062d012009-03-23 17:35:17 +02004365 .handle_exit = vmx_handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004366 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04004367 .set_interrupt_shadow = vmx_set_interrupt_shadow,
4368 .get_interrupt_shadow = vmx_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02004369 .patch_hypercall = vmx_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03004370 .set_irq = vmx_inject_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004371 .set_nmi = vmx_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02004372 .queue_exception = vmx_queue_exception,
Avi Kivityb463a6f2010-07-20 15:06:17 +03004373 .cancel_injection = vmx_cancel_injection,
Gleb Natapov78646122009-03-23 12:12:11 +02004374 .interrupt_allowed = vmx_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004375 .nmi_allowed = vmx_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01004376 .get_nmi_mask = vmx_get_nmi_mask,
4377 .set_nmi_mask = vmx_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004378 .enable_nmi_window = enable_nmi_window,
4379 .enable_irq_window = enable_irq_window,
4380 .update_cr8_intercept = update_cr8_intercept,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004381
Izik Eiduscbc94022007-10-25 00:29:55 +02004382 .set_tss_addr = vmx_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08004383 .get_tdp_level = get_ept_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004384 .get_mt_mask = vmx_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004385
Avi Kivity586f9602010-11-18 13:09:54 +02004386 .get_exit_info = vmx_get_exit_info,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004387 .exit_reasons_str = vmx_exit_reasons_str,
Avi Kivity586f9602010-11-18 13:09:54 +02004388
Sheng Yang17cc3932010-01-05 19:02:27 +08004389 .get_lpage_level = vmx_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08004390
4391 .cpuid_update = vmx_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004392
4393 .rdtscp_supported = vmx_rdtscp_supported,
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004394
4395 .set_supported_cpuid = vmx_set_supported_cpuid,
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004396
4397 .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004398
4399 .write_tsc_offset = vmx_write_tsc_offset,
Zachary Amsdene48672f2010-08-19 22:07:23 -10004400 .adjust_tsc_offset = vmx_adjust_tsc_offset,
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004401
4402 .set_tdp_cr3 = vmx_set_cr3,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004403};
4404
4405static int __init vmx_init(void)
4406{
Avi Kivity26bb0982009-09-07 11:14:12 +03004407 int r, i;
4408
4409 rdmsrl_safe(MSR_EFER, &host_efer);
4410
4411 for (i = 0; i < NR_VMX_MSR; ++i)
4412 kvm_define_shared_msr(i, vmx_msr_index[i]);
He, Qingfdef3ad2007-04-30 09:45:24 +03004413
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004414 vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004415 if (!vmx_io_bitmap_a)
4416 return -ENOMEM;
4417
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004418 vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004419 if (!vmx_io_bitmap_b) {
4420 r = -ENOMEM;
4421 goto out;
4422 }
4423
Avi Kivity58972972009-02-24 22:26:47 +02004424 vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
4425 if (!vmx_msr_bitmap_legacy) {
Sheng Yang25c5f222008-03-28 13:18:56 +08004426 r = -ENOMEM;
4427 goto out1;
4428 }
4429
Avi Kivity58972972009-02-24 22:26:47 +02004430 vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
4431 if (!vmx_msr_bitmap_longmode) {
4432 r = -ENOMEM;
4433 goto out2;
4434 }
4435
He, Qingfdef3ad2007-04-30 09:45:24 +03004436 /*
4437 * Allow direct access to the PC debug port (it is often used for I/O
4438 * delays, but the vmexits simply slow things down).
4439 */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004440 memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
4441 clear_bit(0x80, vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004442
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004443 memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004444
Avi Kivity58972972009-02-24 22:26:47 +02004445 memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
4446 memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
Sheng Yang25c5f222008-03-28 13:18:56 +08004447
Sheng Yang2384d2b2008-01-17 15:14:33 +08004448 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
4449
Avi Kivity0ee75be2010-04-28 15:39:01 +03004450 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
4451 __alignof__(struct vcpu_vmx), THIS_MODULE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004452 if (r)
Avi Kivity58972972009-02-24 22:26:47 +02004453 goto out3;
Sheng Yang25c5f222008-03-28 13:18:56 +08004454
Avi Kivity58972972009-02-24 22:26:47 +02004455 vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
4456 vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
4457 vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
4458 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
4459 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
4460 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
He, Qingfdef3ad2007-04-30 09:45:24 +03004461
Avi Kivity089d0342009-03-23 18:26:32 +02004462 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08004463 bypass_guest_pf = 0;
Sheng Yang534e38b2008-09-08 15:12:30 +08004464 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004465 VMX_EPT_EXECUTABLE_MASK);
Sheng Yang5fdbcb92008-07-16 09:25:40 +08004466 kvm_enable_tdp();
4467 } else
4468 kvm_disable_tdp();
Sheng Yang14394422008-04-28 12:24:45 +08004469
Avi Kivityc7addb92007-09-16 18:58:32 +02004470 if (bypass_guest_pf)
4471 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
4472
He, Qingfdef3ad2007-04-30 09:45:24 +03004473 return 0;
4474
Avi Kivity58972972009-02-24 22:26:47 +02004475out3:
4476 free_page((unsigned long)vmx_msr_bitmap_longmode);
Sheng Yang25c5f222008-03-28 13:18:56 +08004477out2:
Avi Kivity58972972009-02-24 22:26:47 +02004478 free_page((unsigned long)vmx_msr_bitmap_legacy);
He, Qingfdef3ad2007-04-30 09:45:24 +03004479out1:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004480 free_page((unsigned long)vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03004481out:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004482 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004483 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004484}
4485
4486static void __exit vmx_exit(void)
4487{
Avi Kivity58972972009-02-24 22:26:47 +02004488 free_page((unsigned long)vmx_msr_bitmap_legacy);
4489 free_page((unsigned long)vmx_msr_bitmap_longmode);
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004490 free_page((unsigned long)vmx_io_bitmap_b);
4491 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004492
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004493 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08004494}
4495
4496module_init(vmx_init)
4497module_exit(vmx_exit)