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Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
Nicolas Kaiser9611c182010-10-06 14:23:22 +02008 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Avi Kivity6aa8b732006-12-10 02:21:36 -08009 *
10 * Authors:
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 *
14 * This work is licensed under the terms of the GNU GPL, version 2. See
15 * the COPYING file in the top-level directory.
16 *
17 */
18
Eddie Dong85f455f2007-07-06 12:20:49 +030019#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080020#include "mmu.h"
Avi Kivitye4956062007-06-28 14:15:57 -040021
Avi Kivityedf88412007-12-16 11:02:48 +020022#include <linux/kvm_host.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080023#include <linux/module.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020024#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080025#include <linux/mm.h>
26#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040027#include <linux/sched.h>
Avi Kivityc7addb92007-09-16 18:58:32 +020028#include <linux/moduleparam.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030029#include <linux/ftrace_event.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090030#include <linux/slab.h>
Shane Wangcafd6652010-04-29 12:09:01 -040031#include <linux/tboot.h>
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030032#include "kvm_cache_regs.h"
Avi Kivity35920a32008-07-03 14:50:12 +030033#include "x86.h"
Avi Kivitye4956062007-06-28 14:15:57 -040034
Avi Kivity6aa8b732006-12-10 02:21:36 -080035#include <asm/io.h>
Anthony Liguori3b3be0d2006-12-13 00:33:43 -080036#include <asm/desc.h>
Eduardo Habkost13673a92008-11-17 19:03:13 -020037#include <asm/vmx.h>
Eduardo Habkost6210e372008-11-17 19:03:16 -020038#include <asm/virtext.h>
Andi Kleena0861c02009-06-08 17:37:09 +080039#include <asm/mce.h>
Dexuan Cui2acf9232010-06-10 11:27:12 +080040#include <asm/i387.h>
41#include <asm/xcr.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080042
Marcelo Tosatti229456f2009-06-17 09:22:14 -030043#include "trace.h"
44
Avi Kivity4ecac3f2008-05-13 13:23:38 +030045#define __ex(x) __kvm_handle_fault_on_reboot(x)
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
Avi Kivitycdc0e242009-12-06 17:21:14 +020072#define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \
73 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
74#define KVM_GUEST_CR0_MASK \
75 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
76#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \
Avi Kivity81231c62010-01-24 16:26:40 +020077 (X86_CR0_WP | X86_CR0_NE)
Avi Kivitycdc0e242009-12-06 17:21:14 +020078#define KVM_VM_CR0_ALWAYS_ON \
79 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
Avi Kivity4c386092009-12-07 12:26:18 +020080#define KVM_CR4_GUEST_OWNED_BITS \
81 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
82 | X86_CR4_OSXMMEXCPT)
83
Avi Kivitycdc0e242009-12-06 17:21:14 +020084#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
85#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
86
Avi Kivity78ac8b42010-04-08 18:19:35 +030087#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
88
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +080089/*
90 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
91 * ple_gap: upper bound on the amount of time between two successive
92 * executions of PAUSE in a loop. Also indicate if ple enabled.
93 * According to test, this time is usually small than 41 cycles.
94 * ple_window: upper bound on the amount of time a guest is allowed to execute
95 * in a PAUSE loop. Tests indicate that most spinlocks are held for
96 * less than 2^12 cycles
97 * Time is measured based on a counter that runs at the same rate as the TSC,
98 * refer SDM volume 3b section 21.6.13 & 22.1.3.
99 */
100#define KVM_VMX_DEFAULT_PLE_GAP 41
101#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
102static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
103module_param(ple_gap, int, S_IRUGO);
104
105static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
106module_param(ple_window, int, S_IRUGO);
107
Avi Kivity61d2ef22010-04-28 16:40:38 +0300108#define NR_AUTOLOAD_MSRS 1
109
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400110struct vmcs {
111 u32 revision_id;
112 u32 abort;
113 char data[0];
114};
115
Avi Kivity26bb0982009-09-07 11:14:12 +0300116struct shared_msr_entry {
117 unsigned index;
118 u64 data;
Avi Kivityd5696722009-12-02 12:28:47 +0200119 u64 mask;
Avi Kivity26bb0982009-09-07 11:14:12 +0300120};
121
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400122struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000123 struct kvm_vcpu vcpu;
Avi Kivity543e4242008-05-13 16:22:47 +0300124 struct list_head local_vcpus_link;
Avi Kivity313dbd42008-07-17 18:04:30 +0300125 unsigned long host_rsp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400126 int launched;
Avi Kivity29bd8a72007-09-10 17:27:03 +0300127 u8 fail;
Avi Kivity51aa01d2010-07-20 14:31:20 +0300128 u32 exit_intr_info;
Avi Kivity1155f762007-11-22 11:30:47 +0200129 u32 idt_vectoring_info;
Avi Kivity26bb0982009-09-07 11:14:12 +0300130 struct shared_msr_entry *guest_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400131 int nmsrs;
132 int save_nmsrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400133#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300134 u64 msr_host_kernel_gs_base;
135 u64 msr_guest_kernel_gs_base;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400136#endif
137 struct vmcs *vmcs;
Avi Kivity61d2ef22010-04-28 16:40:38 +0300138 struct msr_autoload {
139 unsigned nr;
140 struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS];
141 struct vmx_msr_entry host[NR_AUTOLOAD_MSRS];
142 } msr_autoload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400143 struct {
144 int loaded;
145 u16 fs_sel, gs_sel, ldt_sel;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200146 int gs_ldt_reload_needed;
147 int fs_reload_needed;
Mike Dayd77c26f2007-10-08 09:02:08 -0400148 } host_state;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200149 struct {
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300150 int vm86_active;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300151 ulong save_rflags;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300152 struct kvm_save_segment {
153 u16 selector;
154 unsigned long base;
155 u32 limit;
156 u32 ar;
157 } tr, es, ds, fs, gs;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200158 } rmode;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800159 int vpid;
Mohammed Gamal04fa4d32008-08-17 16:39:48 +0300160 bool emulation_required;
Jan Kiszka3b86cd92008-09-26 09:30:57 +0200161
162 /* Support for vnmi-less CPUs */
163 int soft_vnmi_blocked;
164 ktime_t entry_time;
165 s64 vnmi_blocked_time;
Andi Kleena0861c02009-06-08 17:37:09 +0800166 u32 exit_reason;
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800167
168 bool rdtscp_enabled;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400169};
170
171static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
172{
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000173 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400174}
175
Sheng Yangb7ebfb02008-04-25 21:44:52 +0800176static int init_rmode(struct kvm *kvm);
Sheng Yang4e1096d2008-07-06 19:16:51 +0800177static u64 construct_eptp(unsigned long root_hpa);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800178static void kvm_cpu_vmxon(u64 addr);
179static void kvm_cpu_vmxoff(void);
Avi Kivity75880a02007-06-20 11:20:04 +0300180
Avi Kivity6aa8b732006-12-10 02:21:36 -0800181static DEFINE_PER_CPU(struct vmcs *, vmxarea);
182static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
Avi Kivity543e4242008-05-13 16:22:47 +0300183static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
Avi Kivity3444d7d2010-07-26 18:32:38 +0300184static DEFINE_PER_CPU(struct desc_ptr, host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800185
Avi Kivity3e7c73e2009-02-24 21:46:19 +0200186static unsigned long *vmx_io_bitmap_a;
187static unsigned long *vmx_io_bitmap_b;
Avi Kivity58972972009-02-24 22:26:47 +0200188static unsigned long *vmx_msr_bitmap_legacy;
189static unsigned long *vmx_msr_bitmap_longmode;
He, Qingfdef3ad2007-04-30 09:45:24 +0300190
Sheng Yang2384d2b2008-01-17 15:14:33 +0800191static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
192static DEFINE_SPINLOCK(vmx_vpid_lock);
193
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300194static struct vmcs_config {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800195 int size;
196 int order;
197 u32 revision_id;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300198 u32 pin_based_exec_ctrl;
199 u32 cpu_based_exec_ctrl;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800200 u32 cpu_based_2nd_exec_ctrl;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300201 u32 vmexit_ctrl;
202 u32 vmentry_ctrl;
203} vmcs_config;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800204
Hannes Ederefff9e52008-11-28 17:02:06 +0100205static struct vmx_capability {
Sheng Yangd56f5462008-04-25 10:13:16 +0800206 u32 ept;
207 u32 vpid;
208} vmx_capability;
209
Avi Kivity6aa8b732006-12-10 02:21:36 -0800210#define VMX_SEGMENT_FIELD(seg) \
211 [VCPU_SREG_##seg] = { \
212 .selector = GUEST_##seg##_SELECTOR, \
213 .base = GUEST_##seg##_BASE, \
214 .limit = GUEST_##seg##_LIMIT, \
215 .ar_bytes = GUEST_##seg##_AR_BYTES, \
216 }
217
218static struct kvm_vmx_segment_field {
219 unsigned selector;
220 unsigned base;
221 unsigned limit;
222 unsigned ar_bytes;
223} kvm_vmx_segment_fields[] = {
224 VMX_SEGMENT_FIELD(CS),
225 VMX_SEGMENT_FIELD(DS),
226 VMX_SEGMENT_FIELD(ES),
227 VMX_SEGMENT_FIELD(FS),
228 VMX_SEGMENT_FIELD(GS),
229 VMX_SEGMENT_FIELD(SS),
230 VMX_SEGMENT_FIELD(TR),
231 VMX_SEGMENT_FIELD(LDTR),
232};
233
Avi Kivity26bb0982009-09-07 11:14:12 +0300234static u64 host_efer;
235
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300236static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
237
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300238/*
Brian Gerst8c065852010-07-17 09:03:26 -0400239 * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300240 * away by decrementing the array size.
241 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800242static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800243#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300244 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800245#endif
Brian Gerst8c065852010-07-17 09:03:26 -0400246 MSR_EFER, MSR_TSC_AUX, MSR_STAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800247};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200248#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800249
Gui Jianfeng31299942010-03-15 17:29:09 +0800250static inline bool is_page_fault(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800251{
252 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
253 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100254 (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800255}
256
Gui Jianfeng31299942010-03-15 17:29:09 +0800257static inline bool is_no_device(u32 intr_info)
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300258{
259 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
260 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100261 (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300262}
263
Gui Jianfeng31299942010-03-15 17:29:09 +0800264static inline bool is_invalid_opcode(u32 intr_info)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500265{
266 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
267 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100268 (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500269}
270
Gui Jianfeng31299942010-03-15 17:29:09 +0800271static inline bool is_external_interrupt(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800272{
273 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
274 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
275}
276
Gui Jianfeng31299942010-03-15 17:29:09 +0800277static inline bool is_machine_check(u32 intr_info)
Andi Kleena0861c02009-06-08 17:37:09 +0800278{
279 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
280 INTR_INFO_VALID_MASK)) ==
281 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
282}
283
Gui Jianfeng31299942010-03-15 17:29:09 +0800284static inline bool cpu_has_vmx_msr_bitmap(void)
Sheng Yang25c5f222008-03-28 13:18:56 +0800285{
Sheng Yang04547152009-04-01 15:52:31 +0800286 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS;
Sheng Yang25c5f222008-03-28 13:18:56 +0800287}
288
Gui Jianfeng31299942010-03-15 17:29:09 +0800289static inline bool cpu_has_vmx_tpr_shadow(void)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800290{
Sheng Yang04547152009-04-01 15:52:31 +0800291 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW;
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800292}
293
Gui Jianfeng31299942010-03-15 17:29:09 +0800294static inline bool vm_need_tpr_shadow(struct kvm *kvm)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800295{
Sheng Yang04547152009-04-01 15:52:31 +0800296 return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm));
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800297}
298
Gui Jianfeng31299942010-03-15 17:29:09 +0800299static inline bool cpu_has_secondary_exec_ctrls(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800300{
Sheng Yang04547152009-04-01 15:52:31 +0800301 return vmcs_config.cpu_based_exec_ctrl &
302 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800303}
304
Avi Kivity774ead32007-12-26 13:57:04 +0200305static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800306{
Sheng Yang04547152009-04-01 15:52:31 +0800307 return vmcs_config.cpu_based_2nd_exec_ctrl &
308 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
309}
310
311static inline bool cpu_has_vmx_flexpriority(void)
312{
313 return cpu_has_vmx_tpr_shadow() &&
314 cpu_has_vmx_virtualize_apic_accesses();
Sheng Yangf78e0e22007-10-29 09:40:42 +0800315}
316
Marcelo Tosattie7997942009-06-11 12:07:40 -0300317static inline bool cpu_has_vmx_ept_execute_only(void)
318{
Gui Jianfeng31299942010-03-15 17:29:09 +0800319 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300320}
321
322static inline bool cpu_has_vmx_eptp_uncacheable(void)
323{
Gui Jianfeng31299942010-03-15 17:29:09 +0800324 return vmx_capability.ept & VMX_EPTP_UC_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300325}
326
327static inline bool cpu_has_vmx_eptp_writeback(void)
328{
Gui Jianfeng31299942010-03-15 17:29:09 +0800329 return vmx_capability.ept & VMX_EPTP_WB_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300330}
331
332static inline bool cpu_has_vmx_ept_2m_page(void)
333{
Gui Jianfeng31299942010-03-15 17:29:09 +0800334 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300335}
336
Sheng Yang878403b2010-01-05 19:02:29 +0800337static inline bool cpu_has_vmx_ept_1g_page(void)
338{
Gui Jianfeng31299942010-03-15 17:29:09 +0800339 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;
Sheng Yang878403b2010-01-05 19:02:29 +0800340}
341
Sheng Yang4bc9b982010-06-02 14:05:24 +0800342static inline bool cpu_has_vmx_ept_4levels(void)
343{
344 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT;
345}
346
Gui Jianfeng31299942010-03-15 17:29:09 +0800347static inline bool cpu_has_vmx_invept_individual_addr(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800348{
Gui Jianfeng31299942010-03-15 17:29:09 +0800349 return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800350}
351
Gui Jianfeng31299942010-03-15 17:29:09 +0800352static inline bool cpu_has_vmx_invept_context(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800353{
Gui Jianfeng31299942010-03-15 17:29:09 +0800354 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800355}
356
Gui Jianfeng31299942010-03-15 17:29:09 +0800357static inline bool cpu_has_vmx_invept_global(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800358{
Gui Jianfeng31299942010-03-15 17:29:09 +0800359 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800360}
361
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800362static inline bool cpu_has_vmx_invvpid_single(void)
363{
364 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
365}
366
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800367static inline bool cpu_has_vmx_invvpid_global(void)
368{
369 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT;
370}
371
Gui Jianfeng31299942010-03-15 17:29:09 +0800372static inline bool cpu_has_vmx_ept(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800373{
Sheng Yang04547152009-04-01 15:52:31 +0800374 return vmcs_config.cpu_based_2nd_exec_ctrl &
375 SECONDARY_EXEC_ENABLE_EPT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800376}
377
Gui Jianfeng31299942010-03-15 17:29:09 +0800378static inline bool cpu_has_vmx_unrestricted_guest(void)
Nitin A Kamble3a624e22009-06-08 11:34:16 -0700379{
380 return vmcs_config.cpu_based_2nd_exec_ctrl &
381 SECONDARY_EXEC_UNRESTRICTED_GUEST;
382}
383
Gui Jianfeng31299942010-03-15 17:29:09 +0800384static inline bool cpu_has_vmx_ple(void)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800385{
386 return vmcs_config.cpu_based_2nd_exec_ctrl &
387 SECONDARY_EXEC_PAUSE_LOOP_EXITING;
388}
389
Gui Jianfeng31299942010-03-15 17:29:09 +0800390static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800391{
Gui Jianfeng6d3e4352010-01-29 15:36:59 +0800392 return flexpriority_enabled && irqchip_in_kernel(kvm);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800393}
394
Gui Jianfeng31299942010-03-15 17:29:09 +0800395static inline bool cpu_has_vmx_vpid(void)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800396{
Sheng Yang04547152009-04-01 15:52:31 +0800397 return vmcs_config.cpu_based_2nd_exec_ctrl &
398 SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800399}
400
Gui Jianfeng31299942010-03-15 17:29:09 +0800401static inline bool cpu_has_vmx_rdtscp(void)
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800402{
403 return vmcs_config.cpu_based_2nd_exec_ctrl &
404 SECONDARY_EXEC_RDTSCP;
405}
406
Gui Jianfeng31299942010-03-15 17:29:09 +0800407static inline bool cpu_has_virtual_nmis(void)
Sheng Yangf08864b2008-05-15 18:23:25 +0800408{
409 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
410}
411
Sheng Yangf5f48ee2010-06-30 12:25:15 +0800412static inline bool cpu_has_vmx_wbinvd_exit(void)
413{
414 return vmcs_config.cpu_based_2nd_exec_ctrl &
415 SECONDARY_EXEC_WBINVD_EXITING;
416}
417
Sheng Yang04547152009-04-01 15:52:31 +0800418static inline bool report_flexpriority(void)
419{
420 return flexpriority_enabled;
421}
422
Rusty Russell8b9cf982007-07-30 16:31:43 +1000423static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800424{
425 int i;
426
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400427 for (i = 0; i < vmx->nmsrs; ++i)
Avi Kivity26bb0982009-09-07 11:14:12 +0300428 if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300429 return i;
430 return -1;
431}
432
Sheng Yang2384d2b2008-01-17 15:14:33 +0800433static inline void __invvpid(int ext, u16 vpid, gva_t gva)
434{
435 struct {
436 u64 vpid : 16;
437 u64 rsvd : 48;
438 u64 gva;
439 } operand = { vpid, 0, gva };
440
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300441 asm volatile (__ex(ASM_VMX_INVVPID)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800442 /* CF==1 or ZF==1 --> rc = -1 */
443 "; ja 1f ; ud2 ; 1:"
444 : : "a"(&operand), "c"(ext) : "cc", "memory");
445}
446
Sheng Yang14394422008-04-28 12:24:45 +0800447static inline void __invept(int ext, u64 eptp, gpa_t gpa)
448{
449 struct {
450 u64 eptp, gpa;
451 } operand = {eptp, gpa};
452
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300453 asm volatile (__ex(ASM_VMX_INVEPT)
Sheng Yang14394422008-04-28 12:24:45 +0800454 /* CF==1 or ZF==1 --> rc = -1 */
455 "; ja 1f ; ud2 ; 1:\n"
456 : : "a" (&operand), "c" (ext) : "cc", "memory");
457}
458
Avi Kivity26bb0982009-09-07 11:14:12 +0300459static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300460{
461 int i;
462
Rusty Russell8b9cf982007-07-30 16:31:43 +1000463 i = __find_msr_index(vmx, msr);
Eddie Donga75beee2007-05-17 18:55:15 +0300464 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400465 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000466 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800467}
468
Avi Kivity6aa8b732006-12-10 02:21:36 -0800469static void vmcs_clear(struct vmcs *vmcs)
470{
471 u64 phys_addr = __pa(vmcs);
472 u8 error;
473
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300474 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
Avi Kivity6aa8b732006-12-10 02:21:36 -0800475 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
476 : "cc", "memory");
477 if (error)
478 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
479 vmcs, phys_addr);
480}
481
Dongxiao Xu7725b892010-05-11 18:29:38 +0800482static void vmcs_load(struct vmcs *vmcs)
483{
484 u64 phys_addr = __pa(vmcs);
485 u8 error;
486
487 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
488 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
489 : "cc", "memory");
490 if (error)
491 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
492 vmcs, phys_addr);
493}
494
Avi Kivity6aa8b732006-12-10 02:21:36 -0800495static void __vcpu_clear(void *arg)
496{
Rusty Russell8b9cf982007-07-30 16:31:43 +1000497 struct vcpu_vmx *vmx = arg;
Ingo Molnard3b2c332007-01-05 16:36:23 -0800498 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800499
Rusty Russell8b9cf982007-07-30 16:31:43 +1000500 if (vmx->vcpu.cpu == cpu)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400501 vmcs_clear(vmx->vmcs);
502 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800503 per_cpu(current_vmcs, cpu) = NULL;
Avi Kivity543e4242008-05-13 16:22:47 +0300504 list_del(&vmx->local_vcpus_link);
505 vmx->vcpu.cpu = -1;
506 vmx->launched = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800507}
508
Rusty Russell8b9cf982007-07-30 16:31:43 +1000509static void vcpu_clear(struct vcpu_vmx *vmx)
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800510{
Avi Kivityeae5ecb2007-09-30 10:50:12 +0200511 if (vmx->vcpu.cpu == -1)
512 return;
Jens Axboe8691e5a2008-06-06 11:18:06 +0200513 smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800514}
515
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800516static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800517{
518 if (vmx->vpid == 0)
519 return;
520
Gui Jianfeng518c8ae2010-06-04 08:51:39 +0800521 if (cpu_has_vmx_invvpid_single())
522 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
Sheng Yang2384d2b2008-01-17 15:14:33 +0800523}
524
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800525static inline void vpid_sync_vcpu_global(void)
526{
527 if (cpu_has_vmx_invvpid_global())
528 __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
529}
530
531static inline void vpid_sync_context(struct vcpu_vmx *vmx)
532{
533 if (cpu_has_vmx_invvpid_single())
Gui Jianfeng1760dd42010-06-07 10:33:27 +0800534 vpid_sync_vcpu_single(vmx);
Gui Jianfengb9d762f2010-06-07 10:32:29 +0800535 else
536 vpid_sync_vcpu_global();
537}
538
Sheng Yang14394422008-04-28 12:24:45 +0800539static inline void ept_sync_global(void)
540{
541 if (cpu_has_vmx_invept_global())
542 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
543}
544
545static inline void ept_sync_context(u64 eptp)
546{
Avi Kivity089d0342009-03-23 18:26:32 +0200547 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800548 if (cpu_has_vmx_invept_context())
549 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
550 else
551 ept_sync_global();
552 }
553}
554
555static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
556{
Avi Kivity089d0342009-03-23 18:26:32 +0200557 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800558 if (cpu_has_vmx_invept_individual_addr())
559 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
560 eptp, gpa);
561 else
562 ept_sync_context(eptp);
563 }
564}
565
Avi Kivity6aa8b732006-12-10 02:21:36 -0800566static unsigned long vmcs_readl(unsigned long field)
567{
568 unsigned long value;
569
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300570 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800571 : "=a"(value) : "d"(field) : "cc");
572 return value;
573}
574
575static u16 vmcs_read16(unsigned long field)
576{
577 return vmcs_readl(field);
578}
579
580static u32 vmcs_read32(unsigned long field)
581{
582 return vmcs_readl(field);
583}
584
585static u64 vmcs_read64(unsigned long field)
586{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800587#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800588 return vmcs_readl(field);
589#else
590 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
591#endif
592}
593
Avi Kivitye52de1b2007-01-05 16:36:56 -0800594static noinline void vmwrite_error(unsigned long field, unsigned long value)
595{
596 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
597 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
598 dump_stack();
599}
600
Avi Kivity6aa8b732006-12-10 02:21:36 -0800601static void vmcs_writel(unsigned long field, unsigned long value)
602{
603 u8 error;
604
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300605 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
Mike Dayd77c26f2007-10-08 09:02:08 -0400606 : "=q"(error) : "a"(value), "d"(field) : "cc");
Avi Kivitye52de1b2007-01-05 16:36:56 -0800607 if (unlikely(error))
608 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800609}
610
611static void vmcs_write16(unsigned long field, u16 value)
612{
613 vmcs_writel(field, value);
614}
615
616static void vmcs_write32(unsigned long field, u32 value)
617{
618 vmcs_writel(field, value);
619}
620
621static void vmcs_write64(unsigned long field, u64 value)
622{
Avi Kivity6aa8b732006-12-10 02:21:36 -0800623 vmcs_writel(field, value);
Avi Kivity7682f2d2008-05-12 19:25:43 +0300624#ifndef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800625 asm volatile ("");
626 vmcs_writel(field+1, value >> 32);
627#endif
628}
629
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300630static void vmcs_clear_bits(unsigned long field, u32 mask)
631{
632 vmcs_writel(field, vmcs_readl(field) & ~mask);
633}
634
635static void vmcs_set_bits(unsigned long field, u32 mask)
636{
637 vmcs_writel(field, vmcs_readl(field) | mask);
638}
639
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300640static void update_exception_bitmap(struct kvm_vcpu *vcpu)
641{
642 u32 eb;
643
Jan Kiszkafd7373c2010-01-20 18:20:20 +0100644 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
645 (1u << NM_VECTOR) | (1u << DB_VECTOR);
646 if ((vcpu->guest_debug &
647 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
648 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
649 eb |= 1u << BP_VECTOR;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300650 if (to_vmx(vcpu)->rmode.vm86_active)
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300651 eb = ~0;
Avi Kivity089d0342009-03-23 18:26:32 +0200652 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +0800653 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
Avi Kivity02daab22009-12-30 12:40:26 +0200654 if (vcpu->fpu_active)
655 eb &= ~(1u << NM_VECTOR);
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300656 vmcs_write32(EXCEPTION_BITMAP, eb);
657}
658
Avi Kivity61d2ef22010-04-28 16:40:38 +0300659static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
660{
661 unsigned i;
662 struct msr_autoload *m = &vmx->msr_autoload;
663
664 for (i = 0; i < m->nr; ++i)
665 if (m->guest[i].index == msr)
666 break;
667
668 if (i == m->nr)
669 return;
670 --m->nr;
671 m->guest[i] = m->guest[m->nr];
672 m->host[i] = m->host[m->nr];
673 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
674 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
675}
676
677static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
678 u64 guest_val, u64 host_val)
679{
680 unsigned i;
681 struct msr_autoload *m = &vmx->msr_autoload;
682
683 for (i = 0; i < m->nr; ++i)
684 if (m->guest[i].index == msr)
685 break;
686
687 if (i == m->nr) {
688 ++m->nr;
689 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
690 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
691 }
692
693 m->guest[i].index = msr;
694 m->guest[i].value = guest_val;
695 m->host[i].index = msr;
696 m->host[i].value = host_val;
697}
698
Avi Kivity33ed6322007-05-02 16:54:03 +0300699static void reload_tss(void)
700{
Avi Kivity33ed6322007-05-02 16:54:03 +0300701 /*
702 * VT restores TR but not its size. Useless.
703 */
Avi Kivityd3591922010-07-26 18:32:39 +0300704 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivitya5f61302008-02-20 17:57:21 +0200705 struct desc_struct *descs;
Avi Kivity33ed6322007-05-02 16:54:03 +0300706
Avi Kivityd3591922010-07-26 18:32:39 +0300707 descs = (void *)gdt->address;
Avi Kivity33ed6322007-05-02 16:54:03 +0300708 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
709 load_TR_desc();
Avi Kivity33ed6322007-05-02 16:54:03 +0300710}
711
Avi Kivity92c0d902009-10-29 11:00:16 +0200712static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
Eddie Dong2cc51562007-05-21 07:28:09 +0300713{
Roel Kluin3a34a882009-08-04 02:08:45 -0700714 u64 guest_efer;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300715 u64 ignore_bits;
Eddie Dong2cc51562007-05-21 07:28:09 +0300716
Avi Kivityf6801df2010-01-21 15:31:50 +0200717 guest_efer = vmx->vcpu.arch.efer;
Roel Kluin3a34a882009-08-04 02:08:45 -0700718
Avi Kivity51c6cf62007-08-29 03:48:05 +0300719 /*
720 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
721 * outside long mode
722 */
723 ignore_bits = EFER_NX | EFER_SCE;
724#ifdef CONFIG_X86_64
725 ignore_bits |= EFER_LMA | EFER_LME;
726 /* SCE is meaningful only in long mode on Intel */
727 if (guest_efer & EFER_LMA)
728 ignore_bits &= ~(u64)EFER_SCE;
729#endif
Avi Kivity51c6cf62007-08-29 03:48:05 +0300730 guest_efer &= ~ignore_bits;
731 guest_efer |= host_efer & ignore_bits;
Avi Kivity26bb0982009-09-07 11:14:12 +0300732 vmx->guest_msrs[efer_offset].data = guest_efer;
Avi Kivityd5696722009-12-02 12:28:47 +0200733 vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
Avi Kivity84ad33e2010-04-28 16:42:29 +0300734
735 clear_atomic_switch_msr(vmx, MSR_EFER);
736 /* On ept, can't emulate nx, and must switch nx atomically */
737 if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) {
738 guest_efer = vmx->vcpu.arch.efer;
739 if (!(guest_efer & EFER_LMA))
740 guest_efer &= ~EFER_LME;
741 add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer);
742 return false;
743 }
744
Avi Kivity26bb0982009-09-07 11:14:12 +0300745 return true;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300746}
747
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200748static unsigned long segment_base(u16 selector)
749{
Avi Kivityd3591922010-07-26 18:32:39 +0300750 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200751 struct desc_struct *d;
752 unsigned long table_base;
753 unsigned long v;
754
755 if (!(selector & ~3))
756 return 0;
757
Avi Kivityd3591922010-07-26 18:32:39 +0300758 table_base = gdt->address;
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200759
760 if (selector & 4) { /* from ldt */
761 u16 ldt_selector = kvm_read_ldt();
762
763 if (!(ldt_selector & ~3))
764 return 0;
765
766 table_base = segment_base(ldt_selector);
767 }
768 d = (struct desc_struct *)(table_base + (selector & ~7));
769 v = get_desc_base(d);
770#ifdef CONFIG_X86_64
771 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
772 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
773#endif
774 return v;
775}
776
777static inline unsigned long kvm_read_tr_base(void)
778{
779 u16 tr;
780 asm("str %0" : "=g"(tr));
781 return segment_base(tr);
782}
783
Avi Kivity04d2cc72007-09-10 18:10:54 +0300784static void vmx_save_host_state(struct kvm_vcpu *vcpu)
Avi Kivity33ed6322007-05-02 16:54:03 +0300785{
Avi Kivity04d2cc72007-09-10 18:10:54 +0300786 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +0300787 int i;
Avi Kivity04d2cc72007-09-10 18:10:54 +0300788
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400789 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300790 return;
791
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400792 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300793 /*
794 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
795 * allow segment selectors with cpl > 0 or ti == 1.
796 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300797 vmx->host_state.ldt_sel = kvm_read_ldt();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200798 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
Avi Kivity9581d442010-10-19 16:46:55 +0200799 savesegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200800 if (!(vmx->host_state.fs_sel & 7)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400801 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200802 vmx->host_state.fs_reload_needed = 0;
803 } else {
Avi Kivity33ed6322007-05-02 16:54:03 +0300804 vmcs_write16(HOST_FS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200805 vmx->host_state.fs_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300806 }
Avi Kivity9581d442010-10-19 16:46:55 +0200807 savesegment(gs, vmx->host_state.gs_sel);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400808 if (!(vmx->host_state.gs_sel & 7))
809 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300810 else {
811 vmcs_write16(HOST_GS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200812 vmx->host_state.gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300813 }
814
815#ifdef CONFIG_X86_64
816 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
817 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
818#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400819 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
820 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +0300821#endif
Avi Kivity707c0872007-05-02 17:33:43 +0300822
823#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300824 if (is_long_mode(&vmx->vcpu)) {
825 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
826 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
827 }
Avi Kivity707c0872007-05-02 17:33:43 +0300828#endif
Avi Kivity26bb0982009-09-07 11:14:12 +0300829 for (i = 0; i < vmx->save_nmsrs; ++i)
830 kvm_set_shared_msr(vmx->guest_msrs[i].index,
Avi Kivityd5696722009-12-02 12:28:47 +0200831 vmx->guest_msrs[i].data,
832 vmx->guest_msrs[i].mask);
Avi Kivity33ed6322007-05-02 16:54:03 +0300833}
834
Avi Kivitya9b21b62008-06-24 11:48:49 +0300835static void __vmx_load_host_state(struct vcpu_vmx *vmx)
Avi Kivity33ed6322007-05-02 16:54:03 +0300836{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400837 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300838 return;
839
Avi Kivitye1beb1d2007-11-18 13:50:24 +0200840 ++vmx->vcpu.stat.host_state_reload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400841 vmx->host_state.loaded = 0;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200842 if (vmx->host_state.gs_ldt_reload_needed) {
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300843 kvm_load_ldt(vmx->host_state.ldt_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300844#ifdef CONFIG_X86_64
Avi Kivity9581d442010-10-19 16:46:55 +0200845 load_gs_index(vmx->host_state.gs_sel);
846 wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
847#else
848 loadsegment(gs, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300849#endif
Avi Kivity33ed6322007-05-02 16:54:03 +0300850 }
Avi Kivity0a77fe42010-10-19 18:48:35 +0200851 if (vmx->host_state.fs_reload_needed)
852 loadsegment(fs, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200853 reload_tss();
Avi Kivity44ea2b12009-09-06 15:55:37 +0300854#ifdef CONFIG_X86_64
855 if (is_long_mode(&vmx->vcpu)) {
856 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
857 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
858 }
859#endif
Avi Kivity1c11e712010-05-03 16:05:44 +0300860 if (current_thread_info()->status & TS_USEDFPU)
861 clts();
Avi Kivity3444d7d2010-07-26 18:32:38 +0300862 load_gdt(&__get_cpu_var(host_gdt));
Avi Kivity33ed6322007-05-02 16:54:03 +0300863}
864
Avi Kivitya9b21b62008-06-24 11:48:49 +0300865static void vmx_load_host_state(struct vcpu_vmx *vmx)
866{
867 preempt_disable();
868 __vmx_load_host_state(vmx);
869 preempt_enable();
870}
871
Avi Kivity6aa8b732006-12-10 02:21:36 -0800872/*
873 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
874 * vcpu mutex is already taken.
875 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300876static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800877{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400878 struct vcpu_vmx *vmx = to_vmx(vcpu);
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800879 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800880
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800881 if (!vmm_exclusive)
882 kvm_cpu_vmxon(phys_addr);
883 else if (vcpu->cpu != cpu)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000884 vcpu_clear(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800885
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400886 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400887 per_cpu(current_vmcs, cpu) = vmx->vmcs;
Dongxiao Xu7725b892010-05-11 18:29:38 +0800888 vmcs_load(vmx->vmcs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800889 }
890
891 if (vcpu->cpu != cpu) {
Avi Kivityd3591922010-07-26 18:32:39 +0300892 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800893 unsigned long sysenter_esp;
894
Avi Kivitya8eeb042010-05-10 12:34:53 +0300895 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
Dongxiao Xu92fe13b2010-05-11 18:29:42 +0800896 local_irq_disable();
897 list_add(&vmx->local_vcpus_link,
898 &per_cpu(vcpus_on_cpu, cpu));
899 local_irq_enable();
900
Avi Kivity6aa8b732006-12-10 02:21:36 -0800901 /*
902 * Linux uses per-cpu TSS and GDT, so set these when switching
903 * processors.
904 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300905 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
Avi Kivityd3591922010-07-26 18:32:39 +0300906 vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800907
908 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
909 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
910 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800911}
912
913static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
914{
Avi Kivitya9b21b62008-06-24 11:48:49 +0300915 __vmx_load_host_state(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800916 if (!vmm_exclusive) {
Dongxiao Xub923e622010-05-11 18:29:45 +0800917 __vcpu_clear(to_vmx(vcpu));
Dongxiao Xu4610c9c2010-05-11 18:29:48 +0800918 kvm_cpu_vmxoff();
919 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800920}
921
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300922static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
923{
Avi Kivity81231c62010-01-24 16:26:40 +0200924 ulong cr0;
925
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300926 if (vcpu->fpu_active)
927 return;
928 vcpu->fpu_active = 1;
Avi Kivity81231c62010-01-24 16:26:40 +0200929 cr0 = vmcs_readl(GUEST_CR0);
930 cr0 &= ~(X86_CR0_TS | X86_CR0_MP);
931 cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP);
932 vmcs_writel(GUEST_CR0, cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300933 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200934 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
935 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300936}
937
Avi Kivityedcafe32009-12-30 18:07:40 +0200938static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
939
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300940static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
941{
Avi Kivityedcafe32009-12-30 18:07:40 +0200942 vmx_decache_cr0_guest_bits(vcpu);
Avi Kivity81231c62010-01-24 16:26:40 +0200943 vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300944 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200945 vcpu->arch.cr0_guest_owned_bits = 0;
946 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
947 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300948}
949
Avi Kivity6aa8b732006-12-10 02:21:36 -0800950static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
951{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300952 unsigned long rflags, save_rflags;
Avi Kivity345dcaa2009-08-12 15:29:37 +0300953
954 rflags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +0300955 if (to_vmx(vcpu)->rmode.vm86_active) {
956 rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
957 save_rflags = to_vmx(vcpu)->rmode.save_rflags;
958 rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
959 }
Avi Kivity345dcaa2009-08-12 15:29:37 +0300960 return rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800961}
962
963static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
964{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300965 if (to_vmx(vcpu)->rmode.vm86_active) {
966 to_vmx(vcpu)->rmode.save_rflags = rflags;
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +0100967 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300968 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800969 vmcs_writel(GUEST_RFLAGS, rflags);
970}
971
Glauber Costa2809f5d2009-05-12 16:21:05 -0400972static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
973{
974 u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
975 int ret = 0;
976
977 if (interruptibility & GUEST_INTR_STATE_STI)
Jan Kiszka48005f62010-02-19 19:38:07 +0100978 ret |= KVM_X86_SHADOW_INT_STI;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400979 if (interruptibility & GUEST_INTR_STATE_MOV_SS)
Jan Kiszka48005f62010-02-19 19:38:07 +0100980 ret |= KVM_X86_SHADOW_INT_MOV_SS;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400981
982 return ret & mask;
983}
984
985static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
986{
987 u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
988 u32 interruptibility = interruptibility_old;
989
990 interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
991
Jan Kiszka48005f62010-02-19 19:38:07 +0100992 if (mask & KVM_X86_SHADOW_INT_MOV_SS)
Glauber Costa2809f5d2009-05-12 16:21:05 -0400993 interruptibility |= GUEST_INTR_STATE_MOV_SS;
Jan Kiszka48005f62010-02-19 19:38:07 +0100994 else if (mask & KVM_X86_SHADOW_INT_STI)
Glauber Costa2809f5d2009-05-12 16:21:05 -0400995 interruptibility |= GUEST_INTR_STATE_STI;
996
997 if ((interruptibility != interruptibility_old))
998 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
999}
1000
Avi Kivity6aa8b732006-12-10 02:21:36 -08001001static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
1002{
1003 unsigned long rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001004
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001005 rip = kvm_rip_read(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001006 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001007 kvm_rip_write(vcpu, rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001008
Glauber Costa2809f5d2009-05-12 16:21:05 -04001009 /* skipping an emulated instruction also counts */
1010 vmx_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001011}
1012
Avi Kivity298101d2007-11-25 13:41:11 +02001013static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
Joerg Roedelce7ddec2010-04-22 12:33:13 +02001014 bool has_error_code, u32 error_code,
1015 bool reinject)
Avi Kivity298101d2007-11-25 13:41:11 +02001016{
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001017 struct vcpu_vmx *vmx = to_vmx(vcpu);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001018 u32 intr_info = nr | INTR_INFO_VALID_MASK;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001019
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001020 if (has_error_code) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001021 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001022 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
1023 }
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001024
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001025 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02001026 if (kvm_inject_realmode_interrupt(vcpu, nr) != EMULATE_DONE)
1027 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka77ab6db2008-07-14 12:28:51 +02001028 return;
1029 }
1030
Gleb Natapov66fd3f72009-05-11 13:35:50 +03001031 if (kvm_exception_is_soft(nr)) {
1032 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
1033 vmx->vcpu.arch.event_exit_inst_len);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +01001034 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
1035 } else
1036 intr_info |= INTR_TYPE_HARD_EXCEPTION;
1037
1038 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
Avi Kivity298101d2007-11-25 13:41:11 +02001039}
1040
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001041static bool vmx_rdtscp_supported(void)
1042{
1043 return cpu_has_vmx_rdtscp();
1044}
1045
Avi Kivity6aa8b732006-12-10 02:21:36 -08001046/*
Eddie Donga75beee2007-05-17 18:55:15 +03001047 * Swap MSR entry in host/guest MSR entry array.
1048 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001049static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
Eddie Donga75beee2007-05-17 18:55:15 +03001050{
Avi Kivity26bb0982009-09-07 11:14:12 +03001051 struct shared_msr_entry tmp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001052
1053 tmp = vmx->guest_msrs[to];
1054 vmx->guest_msrs[to] = vmx->guest_msrs[from];
1055 vmx->guest_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +03001056}
1057
1058/*
Avi Kivitye38aea32007-04-19 13:22:48 +03001059 * Set up the vmcs to automatically save and restore system
1060 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
1061 * mode, as fiddling with msrs is very expensive.
1062 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001063static void setup_msrs(struct vcpu_vmx *vmx)
Avi Kivitye38aea32007-04-19 13:22:48 +03001064{
Avi Kivity26bb0982009-09-07 11:14:12 +03001065 int save_nmsrs, index;
Avi Kivity58972972009-02-24 22:26:47 +02001066 unsigned long *msr_bitmap;
Avi Kivitye38aea32007-04-19 13:22:48 +03001067
Avi Kivity33f9c502008-02-27 16:06:57 +02001068 vmx_load_host_state(vmx);
Eddie Donga75beee2007-05-17 18:55:15 +03001069 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001070#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +10001071 if (is_long_mode(&vmx->vcpu)) {
Rusty Russell8b9cf982007-07-30 16:31:43 +10001072 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
Eddie Donga75beee2007-05-17 18:55:15 +03001073 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001074 move_msr_up(vmx, index, save_nmsrs++);
1075 index = __find_msr_index(vmx, MSR_LSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001076 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001077 move_msr_up(vmx, index, save_nmsrs++);
1078 index = __find_msr_index(vmx, MSR_CSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +03001079 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +10001080 move_msr_up(vmx, index, save_nmsrs++);
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001081 index = __find_msr_index(vmx, MSR_TSC_AUX);
1082 if (index >= 0 && vmx->rdtscp_enabled)
1083 move_msr_up(vmx, index, save_nmsrs++);
Eddie Donga75beee2007-05-17 18:55:15 +03001084 /*
Brian Gerst8c065852010-07-17 09:03:26 -04001085 * MSR_STAR is only needed on long mode guests, and only
Eddie Donga75beee2007-05-17 18:55:15 +03001086 * if efer.sce is enabled.
1087 */
Brian Gerst8c065852010-07-17 09:03:26 -04001088 index = __find_msr_index(vmx, MSR_STAR);
Avi Kivityf6801df2010-01-21 15:31:50 +02001089 if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE))
Rusty Russell8b9cf982007-07-30 16:31:43 +10001090 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001091 }
Eddie Donga75beee2007-05-17 18:55:15 +03001092#endif
Avi Kivity92c0d902009-10-29 11:00:16 +02001093 index = __find_msr_index(vmx, MSR_EFER);
1094 if (index >= 0 && update_transition_efer(vmx, index))
Avi Kivity26bb0982009-09-07 11:14:12 +03001095 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001096
Avi Kivity26bb0982009-09-07 11:14:12 +03001097 vmx->save_nmsrs = save_nmsrs;
Avi Kivity58972972009-02-24 22:26:47 +02001098
1099 if (cpu_has_vmx_msr_bitmap()) {
1100 if (is_long_mode(&vmx->vcpu))
1101 msr_bitmap = vmx_msr_bitmap_longmode;
1102 else
1103 msr_bitmap = vmx_msr_bitmap_legacy;
1104
1105 vmcs_write64(MSR_BITMAP, __pa(msr_bitmap));
1106 }
Avi Kivitye38aea32007-04-19 13:22:48 +03001107}
1108
1109/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08001110 * reads and returns guest's timestamp counter "register"
1111 * guest_tsc = host_tsc + tsc_offset -- 21.3
1112 */
1113static u64 guest_read_tsc(void)
1114{
1115 u64 host_tsc, tsc_offset;
1116
1117 rdtscll(host_tsc);
1118 tsc_offset = vmcs_read64(TSC_OFFSET);
1119 return host_tsc + tsc_offset;
1120}
1121
1122/*
Zachary Amsden99e3e302010-08-19 22:07:17 -10001123 * writes 'offset' into guest's timestamp counter offset register
Avi Kivity6aa8b732006-12-10 02:21:36 -08001124 */
Zachary Amsden99e3e302010-08-19 22:07:17 -10001125static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001126{
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001127 vmcs_write64(TSC_OFFSET, offset);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001128}
1129
Zachary Amsdene48672f2010-08-19 22:07:23 -10001130static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
1131{
1132 u64 offset = vmcs_read64(TSC_OFFSET);
1133 vmcs_write64(TSC_OFFSET, offset + adjustment);
1134}
1135
Avi Kivity6aa8b732006-12-10 02:21:36 -08001136/*
1137 * Reads an msr value (of 'msr_index') into 'pdata'.
1138 * Returns 0 on success, non-0 otherwise.
1139 * Assumes vcpu_load() was already called.
1140 */
1141static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1142{
1143 u64 data;
Avi Kivity26bb0982009-09-07 11:14:12 +03001144 struct shared_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001145
1146 if (!pdata) {
1147 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
1148 return -EINVAL;
1149 }
1150
1151 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001152#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001153 case MSR_FS_BASE:
1154 data = vmcs_readl(GUEST_FS_BASE);
1155 break;
1156 case MSR_GS_BASE:
1157 data = vmcs_readl(GUEST_GS_BASE);
1158 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001159 case MSR_KERNEL_GS_BASE:
1160 vmx_load_host_state(to_vmx(vcpu));
1161 data = to_vmx(vcpu)->msr_guest_kernel_gs_base;
1162 break;
Avi Kivity26bb0982009-09-07 11:14:12 +03001163#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001164 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -08001165 return kvm_get_msr_common(vcpu, msr_index, pdata);
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301166 case MSR_IA32_TSC:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001167 data = guest_read_tsc();
1168 break;
1169 case MSR_IA32_SYSENTER_CS:
1170 data = vmcs_read32(GUEST_SYSENTER_CS);
1171 break;
1172 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001173 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001174 break;
1175 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001176 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001177 break;
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001178 case MSR_TSC_AUX:
1179 if (!to_vmx(vcpu)->rdtscp_enabled)
1180 return 1;
1181 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001182 default:
Avi Kivity26bb0982009-09-07 11:14:12 +03001183 vmx_load_host_state(to_vmx(vcpu));
Rusty Russell8b9cf982007-07-30 16:31:43 +10001184 msr = find_msr_entry(to_vmx(vcpu), msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001185 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001186 vmx_load_host_state(to_vmx(vcpu));
Avi Kivity3bab1f52006-12-29 16:49:48 -08001187 data = msr->data;
1188 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001189 }
Avi Kivity3bab1f52006-12-29 16:49:48 -08001190 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001191 }
1192
1193 *pdata = data;
1194 return 0;
1195}
1196
1197/*
1198 * Writes msr value into into the appropriate "register".
1199 * Returns 0 on success, non-0 otherwise.
1200 * Assumes vcpu_load() was already called.
1201 */
1202static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1203{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001204 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001205 struct shared_msr_entry *msr;
Eddie Dong2cc51562007-05-21 07:28:09 +03001206 int ret = 0;
1207
Avi Kivity6aa8b732006-12-10 02:21:36 -08001208 switch (msr_index) {
Avi Kivity3bab1f52006-12-29 16:49:48 -08001209 case MSR_EFER:
Avi Kivitya9b21b62008-06-24 11:48:49 +03001210 vmx_load_host_state(vmx);
Eddie Dong2cc51562007-05-21 07:28:09 +03001211 ret = kvm_set_msr_common(vcpu, msr_index, data);
Eddie Dong2cc51562007-05-21 07:28:09 +03001212 break;
Avi Kivity16175a72009-03-23 22:13:44 +02001213#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001214 case MSR_FS_BASE:
1215 vmcs_writel(GUEST_FS_BASE, data);
1216 break;
1217 case MSR_GS_BASE:
1218 vmcs_writel(GUEST_GS_BASE, data);
1219 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001220 case MSR_KERNEL_GS_BASE:
1221 vmx_load_host_state(vmx);
1222 vmx->msr_guest_kernel_gs_base = data;
1223 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001224#endif
1225 case MSR_IA32_SYSENTER_CS:
1226 vmcs_write32(GUEST_SYSENTER_CS, data);
1227 break;
1228 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001229 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001230 break;
1231 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001232 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001233 break;
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301234 case MSR_IA32_TSC:
Zachary Amsden99e3e302010-08-19 22:07:17 -10001235 kvm_write_tsc(vcpu, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001236 break;
Sheng Yang468d4722008-10-09 16:01:55 +08001237 case MSR_IA32_CR_PAT:
1238 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
1239 vmcs_write64(GUEST_IA32_PAT, data);
1240 vcpu->arch.pat = data;
1241 break;
1242 }
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001243 ret = kvm_set_msr_common(vcpu, msr_index, data);
1244 break;
1245 case MSR_TSC_AUX:
1246 if (!vmx->rdtscp_enabled)
1247 return 1;
1248 /* Check reserved bit, higher 32 bits should be zero */
1249 if ((data >> 32) != 0)
1250 return 1;
1251 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001252 default:
Rusty Russell8b9cf982007-07-30 16:31:43 +10001253 msr = find_msr_entry(vmx, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001254 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001255 vmx_load_host_state(vmx);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001256 msr->data = data;
1257 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001258 }
Eddie Dong2cc51562007-05-21 07:28:09 +03001259 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001260 }
1261
Eddie Dong2cc51562007-05-21 07:28:09 +03001262 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001263}
1264
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001265static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001266{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001267 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
1268 switch (reg) {
1269 case VCPU_REGS_RSP:
1270 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
1271 break;
1272 case VCPU_REGS_RIP:
1273 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
1274 break;
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001275 case VCPU_EXREG_PDPTR:
1276 if (enable_ept)
1277 ept_save_pdptrs(vcpu);
1278 break;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001279 default:
1280 break;
1281 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001282}
1283
Jan Kiszka355be0b2009-10-03 00:31:21 +02001284static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001285{
Jan Kiszkaae675ef2008-12-15 13:52:10 +01001286 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1287 vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]);
1288 else
1289 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
1290
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001291 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001292}
1293
1294static __init int cpu_has_kvm_support(void)
1295{
Eduardo Habkost6210e372008-11-17 19:03:16 -02001296 return cpu_has_vmx();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001297}
1298
1299static __init int vmx_disabled_by_bios(void)
1300{
1301 u64 msr;
1302
1303 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Shane Wangcafd6652010-04-29 12:09:01 -04001304 if (msr & FEATURE_CONTROL_LOCKED) {
1305 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
1306 && tboot_enabled())
1307 return 1;
1308 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
1309 && !tboot_enabled())
1310 return 1;
1311 }
1312
1313 return 0;
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001314 /* locked but not enabled */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001315}
1316
Dongxiao Xu7725b892010-05-11 18:29:38 +08001317static void kvm_cpu_vmxon(u64 addr)
1318{
1319 asm volatile (ASM_VMX_VMXON_RAX
1320 : : "a"(&addr), "m"(addr)
1321 : "memory", "cc");
1322}
1323
Alexander Graf10474ae2009-09-15 11:37:46 +02001324static int hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001325{
1326 int cpu = raw_smp_processor_id();
1327 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
Shane Wangcafd6652010-04-29 12:09:01 -04001328 u64 old, test_bits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001329
Alexander Graf10474ae2009-09-15 11:37:46 +02001330 if (read_cr4() & X86_CR4_VMXE)
1331 return -EBUSY;
1332
Avi Kivity543e4242008-05-13 16:22:47 +03001333 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001334 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Shane Wangcafd6652010-04-29 12:09:01 -04001335
1336 test_bits = FEATURE_CONTROL_LOCKED;
1337 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
1338 if (tboot_enabled())
1339 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX;
1340
1341 if ((old & test_bits) != test_bits) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001342 /* enable and lock */
Shane Wangcafd6652010-04-29 12:09:01 -04001343 wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits);
1344 }
Rusty Russell66aee912007-07-17 23:34:16 +10001345 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Alexander Graf10474ae2009-09-15 11:37:46 +02001346
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001347 if (vmm_exclusive) {
1348 kvm_cpu_vmxon(phys_addr);
1349 ept_sync_global();
1350 }
Alexander Graf10474ae2009-09-15 11:37:46 +02001351
Avi Kivity3444d7d2010-07-26 18:32:38 +03001352 store_gdt(&__get_cpu_var(host_gdt));
1353
Alexander Graf10474ae2009-09-15 11:37:46 +02001354 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001355}
1356
Avi Kivity543e4242008-05-13 16:22:47 +03001357static void vmclear_local_vcpus(void)
1358{
1359 int cpu = raw_smp_processor_id();
1360 struct vcpu_vmx *vmx, *n;
1361
1362 list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
1363 local_vcpus_link)
1364 __vcpu_clear(vmx);
1365}
1366
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001367
1368/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
1369 * tricks.
1370 */
1371static void kvm_cpu_vmxoff(void)
1372{
1373 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001374}
1375
Avi Kivity6aa8b732006-12-10 02:21:36 -08001376static void hardware_disable(void *garbage)
1377{
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08001378 if (vmm_exclusive) {
1379 vmclear_local_vcpus();
1380 kvm_cpu_vmxoff();
1381 }
Dongxiao Xu7725b892010-05-11 18:29:38 +08001382 write_cr4(read_cr4() & ~X86_CR4_VMXE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001383}
1384
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001385static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
Mike Dayd77c26f2007-10-08 09:02:08 -04001386 u32 msr, u32 *result)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001387{
1388 u32 vmx_msr_low, vmx_msr_high;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001389 u32 ctl = ctl_min | ctl_opt;
1390
1391 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1392
1393 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
1394 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
1395
1396 /* Ensure minimum (required) set of control bits are supported. */
1397 if (ctl_min & ~ctl)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001398 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001399
1400 *result = ctl;
1401 return 0;
1402}
1403
Yang, Sheng002c7f72007-07-31 14:23:01 +03001404static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001405{
1406 u32 vmx_msr_low, vmx_msr_high;
Sheng Yangd56f5462008-04-25 10:13:16 +08001407 u32 min, opt, min2, opt2;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001408 u32 _pin_based_exec_control = 0;
1409 u32 _cpu_based_exec_control = 0;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001410 u32 _cpu_based_2nd_exec_control = 0;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001411 u32 _vmexit_control = 0;
1412 u32 _vmentry_control = 0;
1413
1414 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
Sheng Yangf08864b2008-05-15 18:23:25 +08001415 opt = PIN_BASED_VIRTUAL_NMIS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001416 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
1417 &_pin_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001418 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001419
1420 min = CPU_BASED_HLT_EXITING |
1421#ifdef CONFIG_X86_64
1422 CPU_BASED_CR8_LOAD_EXITING |
1423 CPU_BASED_CR8_STORE_EXITING |
1424#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001425 CPU_BASED_CR3_LOAD_EXITING |
1426 CPU_BASED_CR3_STORE_EXITING |
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001427 CPU_BASED_USE_IO_BITMAPS |
1428 CPU_BASED_MOV_DR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001429 CPU_BASED_USE_TSC_OFFSETING |
Sheng Yang59708672009-12-15 13:29:54 +08001430 CPU_BASED_MWAIT_EXITING |
1431 CPU_BASED_MONITOR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001432 CPU_BASED_INVLPG_EXITING;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001433 opt = CPU_BASED_TPR_SHADOW |
Sheng Yang25c5f222008-03-28 13:18:56 +08001434 CPU_BASED_USE_MSR_BITMAPS |
Sheng Yangf78e0e22007-10-29 09:40:42 +08001435 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001436 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1437 &_cpu_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001438 return -EIO;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001439#ifdef CONFIG_X86_64
1440 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
1441 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
1442 ~CPU_BASED_CR8_STORE_EXITING;
1443#endif
Sheng Yangf78e0e22007-10-29 09:40:42 +08001444 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
Sheng Yangd56f5462008-04-25 10:13:16 +08001445 min2 = 0;
1446 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
Sheng Yang2384d2b2008-01-17 15:14:33 +08001447 SECONDARY_EXEC_WBINVD_EXITING |
Sheng Yangd56f5462008-04-25 10:13:16 +08001448 SECONDARY_EXEC_ENABLE_VPID |
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001449 SECONDARY_EXEC_ENABLE_EPT |
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001450 SECONDARY_EXEC_UNRESTRICTED_GUEST |
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001451 SECONDARY_EXEC_PAUSE_LOOP_EXITING |
1452 SECONDARY_EXEC_RDTSCP;
Sheng Yangd56f5462008-04-25 10:13:16 +08001453 if (adjust_vmx_controls(min2, opt2,
1454 MSR_IA32_VMX_PROCBASED_CTLS2,
Sheng Yangf78e0e22007-10-29 09:40:42 +08001455 &_cpu_based_2nd_exec_control) < 0)
1456 return -EIO;
1457 }
1458#ifndef CONFIG_X86_64
1459 if (!(_cpu_based_2nd_exec_control &
1460 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
1461 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
1462#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001463 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
Marcelo Tosattia7052892008-09-23 13:18:35 -03001464 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
1465 enabled */
Gleb Natapov5fff7d22009-08-27 18:41:30 +03001466 _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING |
1467 CPU_BASED_CR3_STORE_EXITING |
1468 CPU_BASED_INVLPG_EXITING);
Sheng Yangd56f5462008-04-25 10:13:16 +08001469 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
1470 vmx_capability.ept, vmx_capability.vpid);
1471 }
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001472
1473 min = 0;
1474#ifdef CONFIG_X86_64
1475 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
1476#endif
Sheng Yang468d4722008-10-09 16:01:55 +08001477 opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001478 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
1479 &_vmexit_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001480 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001481
Sheng Yang468d4722008-10-09 16:01:55 +08001482 min = 0;
1483 opt = VM_ENTRY_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001484 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
1485 &_vmentry_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001486 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001487
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001488 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001489
1490 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1491 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001492 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001493
1494#ifdef CONFIG_X86_64
1495 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1496 if (vmx_msr_high & (1u<<16))
Yang, Sheng002c7f72007-07-31 14:23:01 +03001497 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001498#endif
1499
1500 /* Require Write-Back (WB) memory type for VMCS accesses. */
1501 if (((vmx_msr_high >> 18) & 15) != 6)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001502 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001503
Yang, Sheng002c7f72007-07-31 14:23:01 +03001504 vmcs_conf->size = vmx_msr_high & 0x1fff;
1505 vmcs_conf->order = get_order(vmcs_config.size);
1506 vmcs_conf->revision_id = vmx_msr_low;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001507
Yang, Sheng002c7f72007-07-31 14:23:01 +03001508 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
1509 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001510 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001511 vmcs_conf->vmexit_ctrl = _vmexit_control;
1512 vmcs_conf->vmentry_ctrl = _vmentry_control;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001513
1514 return 0;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001515}
Avi Kivity6aa8b732006-12-10 02:21:36 -08001516
1517static struct vmcs *alloc_vmcs_cpu(int cpu)
1518{
1519 int node = cpu_to_node(cpu);
1520 struct page *pages;
1521 struct vmcs *vmcs;
1522
Mel Gorman6484eb32009-06-16 15:31:54 -07001523 pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001524 if (!pages)
1525 return NULL;
1526 vmcs = page_address(pages);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001527 memset(vmcs, 0, vmcs_config.size);
1528 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001529 return vmcs;
1530}
1531
1532static struct vmcs *alloc_vmcs(void)
1533{
Ingo Molnard3b2c332007-01-05 16:36:23 -08001534 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -08001535}
1536
1537static void free_vmcs(struct vmcs *vmcs)
1538{
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001539 free_pages((unsigned long)vmcs, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001540}
1541
Sam Ravnborg39959582007-06-01 00:47:13 -07001542static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001543{
1544 int cpu;
1545
Zachary Amsden3230bb42009-09-29 11:38:37 -10001546 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001547 free_vmcs(per_cpu(vmxarea, cpu));
Zachary Amsden3230bb42009-09-29 11:38:37 -10001548 per_cpu(vmxarea, cpu) = NULL;
1549 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001550}
1551
Avi Kivity6aa8b732006-12-10 02:21:36 -08001552static __init int alloc_kvm_area(void)
1553{
1554 int cpu;
1555
Zachary Amsden3230bb42009-09-29 11:38:37 -10001556 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001557 struct vmcs *vmcs;
1558
1559 vmcs = alloc_vmcs_cpu(cpu);
1560 if (!vmcs) {
1561 free_kvm_area();
1562 return -ENOMEM;
1563 }
1564
1565 per_cpu(vmxarea, cpu) = vmcs;
1566 }
1567 return 0;
1568}
1569
1570static __init int hardware_setup(void)
1571{
Yang, Sheng002c7f72007-07-31 14:23:01 +03001572 if (setup_vmcs_config(&vmcs_config) < 0)
1573 return -EIO;
Joerg Roedel50a37eb2008-01-31 14:57:38 +01001574
1575 if (boot_cpu_has(X86_FEATURE_NX))
1576 kvm_enable_efer_bits(EFER_NX);
1577
Sheng Yang93ba03c2009-04-01 15:52:32 +08001578 if (!cpu_has_vmx_vpid())
1579 enable_vpid = 0;
1580
Sheng Yang4bc9b982010-06-02 14:05:24 +08001581 if (!cpu_has_vmx_ept() ||
1582 !cpu_has_vmx_ept_4levels()) {
Sheng Yang93ba03c2009-04-01 15:52:32 +08001583 enable_ept = 0;
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001584 enable_unrestricted_guest = 0;
1585 }
1586
1587 if (!cpu_has_vmx_unrestricted_guest())
1588 enable_unrestricted_guest = 0;
Sheng Yang93ba03c2009-04-01 15:52:32 +08001589
1590 if (!cpu_has_vmx_flexpriority())
1591 flexpriority_enabled = 0;
1592
Gleb Natapov95ba8273132009-04-21 17:45:08 +03001593 if (!cpu_has_vmx_tpr_shadow())
1594 kvm_x86_ops->update_cr8_intercept = NULL;
1595
Marcelo Tosatti54dee992009-06-11 12:07:44 -03001596 if (enable_ept && !cpu_has_vmx_ept_2m_page())
1597 kvm_disable_largepages();
1598
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001599 if (!cpu_has_vmx_ple())
1600 ple_gap = 0;
1601
Avi Kivity6aa8b732006-12-10 02:21:36 -08001602 return alloc_kvm_area();
1603}
1604
1605static __exit void hardware_unsetup(void)
1606{
1607 free_kvm_area();
1608}
1609
Avi Kivity6aa8b732006-12-10 02:21:36 -08001610static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
1611{
1612 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1613
Avi Kivity6af11b92007-03-19 13:18:10 +02001614 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001615 vmcs_write16(sf->selector, save->selector);
1616 vmcs_writel(sf->base, save->base);
1617 vmcs_write32(sf->limit, save->limit);
1618 vmcs_write32(sf->ar_bytes, save->ar);
1619 } else {
1620 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
1621 << AR_DPL_SHIFT;
1622 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
1623 }
1624}
1625
1626static void enter_pmode(struct kvm_vcpu *vcpu)
1627{
1628 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001629 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001630
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001631 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001632 vmx->rmode.vm86_active = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001633
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001634 vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base);
1635 vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit);
1636 vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001637
1638 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001639 flags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
1640 flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001641 vmcs_writel(GUEST_RFLAGS, flags);
1642
Rusty Russell66aee912007-07-17 23:34:16 +10001643 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
1644 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001645
1646 update_exception_bitmap(vcpu);
1647
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001648 if (emulate_invalid_guest_state)
1649 return;
1650
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001651 fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es);
1652 fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds);
1653 fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs);
1654 fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001655
1656 vmcs_write16(GUEST_SS_SELECTOR, 0);
1657 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
1658
1659 vmcs_write16(GUEST_CS_SELECTOR,
1660 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
1661 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1662}
1663
Mike Dayd77c26f2007-10-08 09:02:08 -04001664static gva_t rmode_tss_base(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001665{
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001666 if (!kvm->arch.tss_addr) {
Marcelo Tosattibc6678a2009-12-23 14:35:21 -02001667 struct kvm_memslots *slots;
1668 gfn_t base_gfn;
1669
Lai Jiangshan90d83dc2010-04-19 17:41:23 +08001670 slots = kvm_memslots(kvm);
Avi Kivityf495c6e2010-06-10 17:21:29 +03001671 base_gfn = slots->memslots[0].base_gfn +
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -02001672 kvm->memslots->memslots[0].npages - 3;
Izik Eiduscbc94022007-10-25 00:29:55 +02001673 return base_gfn << PAGE_SHIFT;
1674 }
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001675 return kvm->arch.tss_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001676}
1677
1678static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
1679{
1680 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1681
1682 save->selector = vmcs_read16(sf->selector);
1683 save->base = vmcs_readl(sf->base);
1684 save->limit = vmcs_read32(sf->limit);
1685 save->ar = vmcs_read32(sf->ar_bytes);
Jan Kiszka15b00f32007-11-19 10:21:45 +01001686 vmcs_write16(sf->selector, save->base >> 4);
1687 vmcs_write32(sf->base, save->base & 0xfffff);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001688 vmcs_write32(sf->limit, 0xffff);
1689 vmcs_write32(sf->ar_bytes, 0xf3);
1690}
1691
1692static void enter_rmode(struct kvm_vcpu *vcpu)
1693{
1694 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001695 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001696
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001697 if (enable_unrestricted_guest)
1698 return;
1699
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001700 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001701 vmx->rmode.vm86_active = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001702
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001703 vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001704 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
1705
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001706 vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001707 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
1708
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001709 vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001710 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1711
1712 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001713 vmx->rmode.save_rflags = flags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001714
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001715 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001716
1717 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10001718 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001719 update_exception_bitmap(vcpu);
1720
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001721 if (emulate_invalid_guest_state)
1722 goto continue_rmode;
1723
Avi Kivity6aa8b732006-12-10 02:21:36 -08001724 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1725 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1726 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1727
1728 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08001729 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02001730 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1731 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001732 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1733
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001734 fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es);
1735 fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds);
1736 fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs);
1737 fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03001738
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001739continue_rmode:
Eddie Dong8668a3c2007-10-10 14:26:45 +08001740 kvm_mmu_reset_context(vcpu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08001741 init_rmode(vcpu->kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001742}
1743
Amit Shah401d10d2009-02-20 22:53:37 +05301744static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1745{
1746 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001747 struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
1748
1749 if (!msr)
1750 return;
Amit Shah401d10d2009-02-20 22:53:37 +05301751
Avi Kivity44ea2b12009-09-06 15:55:37 +03001752 /*
1753 * Force kernel_gs_base reloading before EFER changes, as control
1754 * of this msr depends on is_long_mode().
1755 */
1756 vmx_load_host_state(to_vmx(vcpu));
Avi Kivityf6801df2010-01-21 15:31:50 +02001757 vcpu->arch.efer = efer;
Amit Shah401d10d2009-02-20 22:53:37 +05301758 if (efer & EFER_LMA) {
1759 vmcs_write32(VM_ENTRY_CONTROLS,
1760 vmcs_read32(VM_ENTRY_CONTROLS) |
1761 VM_ENTRY_IA32E_MODE);
1762 msr->data = efer;
1763 } else {
1764 vmcs_write32(VM_ENTRY_CONTROLS,
1765 vmcs_read32(VM_ENTRY_CONTROLS) &
1766 ~VM_ENTRY_IA32E_MODE);
1767
1768 msr->data = efer & ~EFER_LME;
1769 }
1770 setup_msrs(vmx);
1771}
1772
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001773#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001774
1775static void enter_lmode(struct kvm_vcpu *vcpu)
1776{
1777 u32 guest_tr_ar;
1778
1779 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1780 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1781 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001782 __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001783 vmcs_write32(GUEST_TR_AR_BYTES,
1784 (guest_tr_ar & ~AR_TYPE_MASK)
1785 | AR_TYPE_BUSY_64_TSS);
1786 }
Avi Kivityda38f432010-07-06 11:30:49 +03001787 vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001788}
1789
1790static void exit_lmode(struct kvm_vcpu *vcpu)
1791{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001792 vmcs_write32(VM_ENTRY_CONTROLS,
1793 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001794 & ~VM_ENTRY_IA32E_MODE);
Avi Kivityda38f432010-07-06 11:30:49 +03001795 vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001796}
1797
1798#endif
1799
Sheng Yang2384d2b2008-01-17 15:14:33 +08001800static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
1801{
Gui Jianfengb9d762f2010-06-07 10:32:29 +08001802 vpid_sync_context(to_vmx(vcpu));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08001803 if (enable_ept) {
1804 if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
1805 return;
Sheng Yang4e1096d2008-07-06 19:16:51 +08001806 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
Xiao Guangrongdd180b32010-07-03 16:02:42 +08001807 }
Sheng Yang2384d2b2008-01-17 15:14:33 +08001808}
1809
Avi Kivitye8467fd2009-12-29 18:43:06 +02001810static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1811{
1812 ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
1813
1814 vcpu->arch.cr0 &= ~cr0_guest_owned_bits;
1815 vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
1816}
1817
Anthony Liguori25c4c272007-04-27 09:29:21 +03001818static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001819{
Avi Kivityfc78f512009-12-07 12:16:48 +02001820 ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
1821
1822 vcpu->arch.cr4 &= ~cr4_guest_owned_bits;
1823 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits;
Avi Kivity399badf2007-01-05 16:36:38 -08001824}
1825
Sheng Yang14394422008-04-28 12:24:45 +08001826static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
1827{
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001828 if (!test_bit(VCPU_EXREG_PDPTR,
1829 (unsigned long *)&vcpu->arch.regs_dirty))
1830 return;
1831
Sheng Yang14394422008-04-28 12:24:45 +08001832 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02001833 vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]);
1834 vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]);
1835 vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]);
1836 vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]);
Sheng Yang14394422008-04-28 12:24:45 +08001837 }
1838}
1839
Avi Kivity8f5d5492009-05-31 18:41:29 +03001840static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
1841{
1842 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Joerg Roedelff03a072010-09-10 17:30:57 +02001843 vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0);
1844 vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1);
1845 vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2);
1846 vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001847 }
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001848
1849 __set_bit(VCPU_EXREG_PDPTR,
1850 (unsigned long *)&vcpu->arch.regs_avail);
1851 __set_bit(VCPU_EXREG_PDPTR,
1852 (unsigned long *)&vcpu->arch.regs_dirty);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001853}
1854
Sheng Yang14394422008-04-28 12:24:45 +08001855static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1856
1857static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
1858 unsigned long cr0,
1859 struct kvm_vcpu *vcpu)
1860{
1861 if (!(cr0 & X86_CR0_PG)) {
1862 /* From paging/starting to nonpaging */
1863 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001864 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
Sheng Yang14394422008-04-28 12:24:45 +08001865 (CPU_BASED_CR3_LOAD_EXITING |
1866 CPU_BASED_CR3_STORE_EXITING));
1867 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001868 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001869 } else if (!is_paging(vcpu)) {
1870 /* From nonpaging to paging */
1871 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001872 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
Sheng Yang14394422008-04-28 12:24:45 +08001873 ~(CPU_BASED_CR3_LOAD_EXITING |
1874 CPU_BASED_CR3_STORE_EXITING));
1875 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001876 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001877 }
Sheng Yang95eb84a2009-08-19 09:52:18 +08001878
1879 if (!(cr0 & X86_CR0_WP))
1880 *hw_cr0 &= ~X86_CR0_WP;
Sheng Yang14394422008-04-28 12:24:45 +08001881}
1882
Avi Kivity6aa8b732006-12-10 02:21:36 -08001883static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1884{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001885 struct vcpu_vmx *vmx = to_vmx(vcpu);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001886 unsigned long hw_cr0;
1887
1888 if (enable_unrestricted_guest)
1889 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST)
1890 | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST;
1891 else
1892 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON;
Sheng Yang14394422008-04-28 12:24:45 +08001893
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001894 if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001895 enter_pmode(vcpu);
1896
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001897 if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001898 enter_rmode(vcpu);
1899
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001900#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02001901 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92f2007-07-17 23:19:08 +10001902 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001903 enter_lmode(vcpu);
Rusty Russell707d92f2007-07-17 23:19:08 +10001904 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001905 exit_lmode(vcpu);
1906 }
1907#endif
1908
Avi Kivity089d0342009-03-23 18:26:32 +02001909 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08001910 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
1911
Avi Kivity02daab22009-12-30 12:40:26 +02001912 if (!vcpu->fpu_active)
Avi Kivity81231c62010-01-24 16:26:40 +02001913 hw_cr0 |= X86_CR0_TS | X86_CR0_MP;
Avi Kivity02daab22009-12-30 12:40:26 +02001914
Avi Kivity6aa8b732006-12-10 02:21:36 -08001915 vmcs_writel(CR0_READ_SHADOW, cr0);
Sheng Yang14394422008-04-28 12:24:45 +08001916 vmcs_writel(GUEST_CR0, hw_cr0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001917 vcpu->arch.cr0 = cr0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001918}
1919
Sheng Yang14394422008-04-28 12:24:45 +08001920static u64 construct_eptp(unsigned long root_hpa)
1921{
1922 u64 eptp;
1923
1924 /* TODO write the value reading from MSR */
1925 eptp = VMX_EPT_DEFAULT_MT |
1926 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
1927 eptp |= (root_hpa & PAGE_MASK);
1928
1929 return eptp;
1930}
1931
Avi Kivity6aa8b732006-12-10 02:21:36 -08001932static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
1933{
Sheng Yang14394422008-04-28 12:24:45 +08001934 unsigned long guest_cr3;
1935 u64 eptp;
1936
1937 guest_cr3 = cr3;
Avi Kivity089d0342009-03-23 18:26:32 +02001938 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08001939 eptp = construct_eptp(cr3);
1940 vmcs_write64(EPT_POINTER, eptp);
Sheng Yang14394422008-04-28 12:24:45 +08001941 guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
Sheng Yangb927a3c2009-07-21 10:42:48 +08001942 vcpu->kvm->arch.ept_identity_map_addr;
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02001943 ept_load_pdptrs(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001944 }
1945
Sheng Yang2384d2b2008-01-17 15:14:33 +08001946 vmx_flush_tlb(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001947 vmcs_writel(GUEST_CR3, guest_cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001948}
1949
1950static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1951{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001952 unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ?
Sheng Yang14394422008-04-28 12:24:45 +08001953 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
1954
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001955 vcpu->arch.cr4 = cr4;
Avi Kivitybc230082009-12-08 12:14:42 +02001956 if (enable_ept) {
1957 if (!is_paging(vcpu)) {
1958 hw_cr4 &= ~X86_CR4_PAE;
1959 hw_cr4 |= X86_CR4_PSE;
1960 } else if (!(cr4 & X86_CR4_PAE)) {
1961 hw_cr4 &= ~X86_CR4_PAE;
1962 }
1963 }
Sheng Yang14394422008-04-28 12:24:45 +08001964
1965 vmcs_writel(CR4_READ_SHADOW, cr4);
1966 vmcs_writel(GUEST_CR4, hw_cr4);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001967}
1968
Avi Kivity6aa8b732006-12-10 02:21:36 -08001969static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1970{
1971 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1972
1973 return vmcs_readl(sf->base);
1974}
1975
1976static void vmx_get_segment(struct kvm_vcpu *vcpu,
1977 struct kvm_segment *var, int seg)
1978{
1979 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1980 u32 ar;
1981
1982 var->base = vmcs_readl(sf->base);
1983 var->limit = vmcs_read32(sf->limit);
1984 var->selector = vmcs_read16(sf->selector);
1985 ar = vmcs_read32(sf->ar_bytes);
Avi Kivity9fd4a3b2009-01-04 23:43:42 +02001986 if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001987 ar = 0;
1988 var->type = ar & 15;
1989 var->s = (ar >> 4) & 1;
1990 var->dpl = (ar >> 5) & 3;
1991 var->present = (ar >> 7) & 1;
1992 var->avl = (ar >> 12) & 1;
1993 var->l = (ar >> 13) & 1;
1994 var->db = (ar >> 14) & 1;
1995 var->g = (ar >> 15) & 1;
1996 var->unusable = (ar >> 16) & 1;
1997}
1998
Izik Eidus2e4d2652008-03-24 19:38:34 +02001999static int vmx_get_cpl(struct kvm_vcpu *vcpu)
2000{
Avi Kivity3eeb3282010-01-21 15:31:48 +02002001 if (!is_protmode(vcpu))
Izik Eidus2e4d2652008-03-24 19:38:34 +02002002 return 0;
2003
2004 if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */
2005 return 3;
2006
Avi Kivityeab4b8a2009-08-04 15:02:54 +03002007 return vmcs_read16(GUEST_CS_SELECTOR) & 3;
Izik Eidus2e4d2652008-03-24 19:38:34 +02002008}
2009
Avi Kivity653e3102007-05-07 10:55:37 +03002010static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002011{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002012 u32 ar;
2013
Avi Kivity653e3102007-05-07 10:55:37 +03002014 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002015 ar = 1 << 16;
2016 else {
2017 ar = var->type & 15;
2018 ar |= (var->s & 1) << 4;
2019 ar |= (var->dpl & 3) << 5;
2020 ar |= (var->present & 1) << 7;
2021 ar |= (var->avl & 1) << 12;
2022 ar |= (var->l & 1) << 13;
2023 ar |= (var->db & 1) << 14;
2024 ar |= (var->g & 1) << 15;
2025 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08002026 if (ar == 0) /* a 0 value means unusable */
2027 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03002028
2029 return ar;
2030}
2031
2032static void vmx_set_segment(struct kvm_vcpu *vcpu,
2033 struct kvm_segment *var, int seg)
2034{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002035 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity653e3102007-05-07 10:55:37 +03002036 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
2037 u32 ar;
2038
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002039 if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) {
2040 vmx->rmode.tr.selector = var->selector;
2041 vmx->rmode.tr.base = var->base;
2042 vmx->rmode.tr.limit = var->limit;
2043 vmx->rmode.tr.ar = vmx_segment_access_rights(var);
Avi Kivity653e3102007-05-07 10:55:37 +03002044 return;
2045 }
2046 vmcs_writel(sf->base, var->base);
2047 vmcs_write32(sf->limit, var->limit);
2048 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002049 if (vmx->rmode.vm86_active && var->s) {
Avi Kivity653e3102007-05-07 10:55:37 +03002050 /*
2051 * Hack real-mode segments into vm86 compatibility.
2052 */
2053 if (var->base == 0xffff0000 && var->selector == 0xf000)
2054 vmcs_writel(sf->base, 0xf0000);
2055 ar = 0xf3;
2056 } else
2057 ar = vmx_segment_access_rights(var);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002058
2059 /*
2060 * Fix the "Accessed" bit in AR field of segment registers for older
2061 * qemu binaries.
2062 * IA32 arch specifies that at the time of processor reset the
2063 * "Accessed" bit in the AR field of segment registers is 1. And qemu
2064 * is setting it to 0 in the usedland code. This causes invalid guest
2065 * state vmexit when "unrestricted guest" mode is turned on.
2066 * Fix for this setup issue in cpu_reset is being pushed in the qemu
2067 * tree. Newer qemu binaries with that qemu fix would not need this
2068 * kvm hack.
2069 */
2070 if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR))
2071 ar |= 0x1; /* Accessed */
2072
Avi Kivity6aa8b732006-12-10 02:21:36 -08002073 vmcs_write32(sf->ar_bytes, ar);
2074}
2075
Avi Kivity6aa8b732006-12-10 02:21:36 -08002076static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2077{
2078 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
2079
2080 *db = (ar >> 14) & 1;
2081 *l = (ar >> 13) & 1;
2082}
2083
Gleb Natapov89a27f42010-02-16 10:51:48 +02002084static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002085{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002086 dt->size = vmcs_read32(GUEST_IDTR_LIMIT);
2087 dt->address = vmcs_readl(GUEST_IDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002088}
2089
Gleb Natapov89a27f42010-02-16 10:51:48 +02002090static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002091{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002092 vmcs_write32(GUEST_IDTR_LIMIT, dt->size);
2093 vmcs_writel(GUEST_IDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002094}
2095
Gleb Natapov89a27f42010-02-16 10:51:48 +02002096static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002097{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002098 dt->size = vmcs_read32(GUEST_GDTR_LIMIT);
2099 dt->address = vmcs_readl(GUEST_GDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002100}
2101
Gleb Natapov89a27f42010-02-16 10:51:48 +02002102static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002103{
Gleb Natapov89a27f42010-02-16 10:51:48 +02002104 vmcs_write32(GUEST_GDTR_LIMIT, dt->size);
2105 vmcs_writel(GUEST_GDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002106}
2107
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002108static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
2109{
2110 struct kvm_segment var;
2111 u32 ar;
2112
2113 vmx_get_segment(vcpu, &var, seg);
2114 ar = vmx_segment_access_rights(&var);
2115
2116 if (var.base != (var.selector << 4))
2117 return false;
2118 if (var.limit != 0xffff)
2119 return false;
2120 if (ar != 0xf3)
2121 return false;
2122
2123 return true;
2124}
2125
2126static bool code_segment_valid(struct kvm_vcpu *vcpu)
2127{
2128 struct kvm_segment cs;
2129 unsigned int cs_rpl;
2130
2131 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2132 cs_rpl = cs.selector & SELECTOR_RPL_MASK;
2133
Avi Kivity1872a3f2009-01-04 23:26:52 +02002134 if (cs.unusable)
2135 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002136 if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
2137 return false;
2138 if (!cs.s)
2139 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002140 if (cs.type & AR_TYPE_WRITEABLE_MASK) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002141 if (cs.dpl > cs_rpl)
2142 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002143 } else {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002144 if (cs.dpl != cs_rpl)
2145 return false;
2146 }
2147 if (!cs.present)
2148 return false;
2149
2150 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
2151 return true;
2152}
2153
2154static bool stack_segment_valid(struct kvm_vcpu *vcpu)
2155{
2156 struct kvm_segment ss;
2157 unsigned int ss_rpl;
2158
2159 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2160 ss_rpl = ss.selector & SELECTOR_RPL_MASK;
2161
Avi Kivity1872a3f2009-01-04 23:26:52 +02002162 if (ss.unusable)
2163 return true;
2164 if (ss.type != 3 && ss.type != 7)
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002165 return false;
2166 if (!ss.s)
2167 return false;
2168 if (ss.dpl != ss_rpl) /* DPL != RPL */
2169 return false;
2170 if (!ss.present)
2171 return false;
2172
2173 return true;
2174}
2175
2176static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
2177{
2178 struct kvm_segment var;
2179 unsigned int rpl;
2180
2181 vmx_get_segment(vcpu, &var, seg);
2182 rpl = var.selector & SELECTOR_RPL_MASK;
2183
Avi Kivity1872a3f2009-01-04 23:26:52 +02002184 if (var.unusable)
2185 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002186 if (!var.s)
2187 return false;
2188 if (!var.present)
2189 return false;
2190 if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
2191 if (var.dpl < rpl) /* DPL < RPL */
2192 return false;
2193 }
2194
2195 /* TODO: Add other members to kvm_segment_field to allow checking for other access
2196 * rights flags
2197 */
2198 return true;
2199}
2200
2201static bool tr_valid(struct kvm_vcpu *vcpu)
2202{
2203 struct kvm_segment tr;
2204
2205 vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);
2206
Avi Kivity1872a3f2009-01-04 23:26:52 +02002207 if (tr.unusable)
2208 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002209 if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2210 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002211 if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002212 return false;
2213 if (!tr.present)
2214 return false;
2215
2216 return true;
2217}
2218
2219static bool ldtr_valid(struct kvm_vcpu *vcpu)
2220{
2221 struct kvm_segment ldtr;
2222
2223 vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);
2224
Avi Kivity1872a3f2009-01-04 23:26:52 +02002225 if (ldtr.unusable)
2226 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002227 if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2228 return false;
2229 if (ldtr.type != 2)
2230 return false;
2231 if (!ldtr.present)
2232 return false;
2233
2234 return true;
2235}
2236
2237static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
2238{
2239 struct kvm_segment cs, ss;
2240
2241 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2242 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2243
2244 return ((cs.selector & SELECTOR_RPL_MASK) ==
2245 (ss.selector & SELECTOR_RPL_MASK));
2246}
2247
2248/*
2249 * Check if guest state is valid. Returns true if valid, false if
2250 * not.
2251 * We assume that registers are always usable
2252 */
2253static bool guest_state_valid(struct kvm_vcpu *vcpu)
2254{
2255 /* real mode guest state checks */
Avi Kivity3eeb3282010-01-21 15:31:48 +02002256 if (!is_protmode(vcpu)) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002257 if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
2258 return false;
2259 if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
2260 return false;
2261 if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
2262 return false;
2263 if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
2264 return false;
2265 if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
2266 return false;
2267 if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
2268 return false;
2269 } else {
2270 /* protected mode guest state checks */
2271 if (!cs_ss_rpl_check(vcpu))
2272 return false;
2273 if (!code_segment_valid(vcpu))
2274 return false;
2275 if (!stack_segment_valid(vcpu))
2276 return false;
2277 if (!data_segment_valid(vcpu, VCPU_SREG_DS))
2278 return false;
2279 if (!data_segment_valid(vcpu, VCPU_SREG_ES))
2280 return false;
2281 if (!data_segment_valid(vcpu, VCPU_SREG_FS))
2282 return false;
2283 if (!data_segment_valid(vcpu, VCPU_SREG_GS))
2284 return false;
2285 if (!tr_valid(vcpu))
2286 return false;
2287 if (!ldtr_valid(vcpu))
2288 return false;
2289 }
2290 /* TODO:
2291 * - Add checks on RIP
2292 * - Add checks on RFLAGS
2293 */
2294
2295 return true;
2296}
2297
Mike Dayd77c26f2007-10-08 09:02:08 -04002298static int init_rmode_tss(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002299{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002300 gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
Izik Eidus195aefd2007-10-01 22:14:18 +02002301 u16 data = 0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002302 int ret = 0;
Izik Eidus195aefd2007-10-01 22:14:18 +02002303 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002304
Izik Eidus195aefd2007-10-01 22:14:18 +02002305 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2306 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002307 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002308 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
Sheng Yang464d17c2008-08-13 14:10:33 +08002309 r = kvm_write_guest_page(kvm, fn++, &data,
2310 TSS_IOPB_BASE_OFFSET, sizeof(u16));
Izik Eidus195aefd2007-10-01 22:14:18 +02002311 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002312 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002313 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
2314 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002315 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002316 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2317 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002318 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002319 data = ~0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002320 r = kvm_write_guest_page(kvm, fn, &data,
2321 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
2322 sizeof(u8));
Izik Eidus195aefd2007-10-01 22:14:18 +02002323 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002324 goto out;
2325
2326 ret = 1;
2327out:
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002328 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002329}
2330
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002331static int init_rmode_identity_map(struct kvm *kvm)
2332{
2333 int i, r, ret;
2334 pfn_t identity_map_pfn;
2335 u32 tmp;
2336
Avi Kivity089d0342009-03-23 18:26:32 +02002337 if (!enable_ept)
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002338 return 1;
2339 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
2340 printk(KERN_ERR "EPT: identity-mapping pagetable "
2341 "haven't been allocated!\n");
2342 return 0;
2343 }
2344 if (likely(kvm->arch.ept_identity_pagetable_done))
2345 return 1;
2346 ret = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002347 identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002348 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
2349 if (r < 0)
2350 goto out;
2351 /* Set up identity-mapping pagetable for EPT in real mode */
2352 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
2353 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
2354 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
2355 r = kvm_write_guest_page(kvm, identity_map_pfn,
2356 &tmp, i * sizeof(tmp), sizeof(tmp));
2357 if (r < 0)
2358 goto out;
2359 }
2360 kvm->arch.ept_identity_pagetable_done = true;
2361 ret = 1;
2362out:
2363 return ret;
2364}
2365
Avi Kivity6aa8b732006-12-10 02:21:36 -08002366static void seg_setup(int seg)
2367{
2368 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002369 unsigned int ar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002370
2371 vmcs_write16(sf->selector, 0);
2372 vmcs_writel(sf->base, 0);
2373 vmcs_write32(sf->limit, 0xffff);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002374 if (enable_unrestricted_guest) {
2375 ar = 0x93;
2376 if (seg == VCPU_SREG_CS)
2377 ar |= 0x08; /* code segment */
2378 } else
2379 ar = 0xf3;
2380
2381 vmcs_write32(sf->ar_bytes, ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002382}
2383
Sheng Yangf78e0e22007-10-29 09:40:42 +08002384static int alloc_apic_access_page(struct kvm *kvm)
2385{
2386 struct kvm_userspace_memory_region kvm_userspace_mem;
2387 int r = 0;
2388
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002389 mutex_lock(&kvm->slots_lock);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002390 if (kvm->arch.apic_access_page)
Sheng Yangf78e0e22007-10-29 09:40:42 +08002391 goto out;
2392 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
2393 kvm_userspace_mem.flags = 0;
2394 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
2395 kvm_userspace_mem.memory_size = PAGE_SIZE;
2396 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2397 if (r)
2398 goto out;
Izik Eidus72dc67a2008-02-10 18:04:15 +02002399
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002400 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002401out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002402 mutex_unlock(&kvm->slots_lock);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002403 return r;
2404}
2405
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002406static int alloc_identity_pagetable(struct kvm *kvm)
2407{
2408 struct kvm_userspace_memory_region kvm_userspace_mem;
2409 int r = 0;
2410
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002411 mutex_lock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002412 if (kvm->arch.ept_identity_pagetable)
2413 goto out;
2414 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
2415 kvm_userspace_mem.flags = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002416 kvm_userspace_mem.guest_phys_addr =
2417 kvm->arch.ept_identity_map_addr;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002418 kvm_userspace_mem.memory_size = PAGE_SIZE;
2419 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2420 if (r)
2421 goto out;
2422
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002423 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
Sheng Yangb927a3c2009-07-21 10:42:48 +08002424 kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002425out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002426 mutex_unlock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002427 return r;
2428}
2429
Sheng Yang2384d2b2008-01-17 15:14:33 +08002430static void allocate_vpid(struct vcpu_vmx *vmx)
2431{
2432 int vpid;
2433
2434 vmx->vpid = 0;
Avi Kivity919818a2009-03-23 18:01:29 +02002435 if (!enable_vpid)
Sheng Yang2384d2b2008-01-17 15:14:33 +08002436 return;
2437 spin_lock(&vmx_vpid_lock);
2438 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
2439 if (vpid < VMX_NR_VPIDS) {
2440 vmx->vpid = vpid;
2441 __set_bit(vpid, vmx_vpid_bitmap);
2442 }
2443 spin_unlock(&vmx_vpid_lock);
2444}
2445
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08002446static void free_vpid(struct vcpu_vmx *vmx)
2447{
2448 if (!enable_vpid)
2449 return;
2450 spin_lock(&vmx_vpid_lock);
2451 if (vmx->vpid != 0)
2452 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
2453 spin_unlock(&vmx_vpid_lock);
2454}
2455
Avi Kivity58972972009-02-24 22:26:47 +02002456static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr)
Sheng Yang25c5f222008-03-28 13:18:56 +08002457{
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002458 int f = sizeof(unsigned long);
Sheng Yang25c5f222008-03-28 13:18:56 +08002459
2460 if (!cpu_has_vmx_msr_bitmap())
2461 return;
2462
2463 /*
2464 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
2465 * have the write-low and read-high bitmap offsets the wrong way round.
2466 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
2467 */
Sheng Yang25c5f222008-03-28 13:18:56 +08002468 if (msr <= 0x1fff) {
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002469 __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */
2470 __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */
Sheng Yang25c5f222008-03-28 13:18:56 +08002471 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
2472 msr &= 0x1fff;
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002473 __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */
2474 __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */
Sheng Yang25c5f222008-03-28 13:18:56 +08002475 }
Sheng Yang25c5f222008-03-28 13:18:56 +08002476}
2477
Avi Kivity58972972009-02-24 22:26:47 +02002478static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only)
2479{
2480 if (!longmode_only)
2481 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr);
2482 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr);
2483}
2484
Avi Kivity6aa8b732006-12-10 02:21:36 -08002485/*
2486 * Sets up the vmcs for emulated real mode.
2487 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002488static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002489{
Sheng Yang468d4722008-10-09 16:01:55 +08002490 u32 host_sysenter_cs, msr_low, msr_high;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002491 u32 junk;
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10002492 u64 host_pat;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002493 unsigned long a;
Gleb Natapov89a27f42010-02-16 10:51:48 +02002494 struct desc_ptr dt;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002495 int i;
Avi Kivitycd2276a2007-05-14 20:41:13 +03002496 unsigned long kvm_vmx_return;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002497 u32 exec_control;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002498
Avi Kivity6aa8b732006-12-10 02:21:36 -08002499 /* I/O */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002500 vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a));
2501 vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002502
Sheng Yang25c5f222008-03-28 13:18:56 +08002503 if (cpu_has_vmx_msr_bitmap())
Avi Kivity58972972009-02-24 22:26:47 +02002504 vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy));
Sheng Yang25c5f222008-03-28 13:18:56 +08002505
Avi Kivity6aa8b732006-12-10 02:21:36 -08002506 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
2507
Avi Kivity6aa8b732006-12-10 02:21:36 -08002508 /* Control */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002509 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
2510 vmcs_config.pin_based_exec_ctrl);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002511
2512 exec_control = vmcs_config.cpu_based_exec_ctrl;
2513 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
2514 exec_control &= ~CPU_BASED_TPR_SHADOW;
2515#ifdef CONFIG_X86_64
2516 exec_control |= CPU_BASED_CR8_STORE_EXITING |
2517 CPU_BASED_CR8_LOAD_EXITING;
2518#endif
2519 }
Avi Kivity089d0342009-03-23 18:26:32 +02002520 if (!enable_ept)
Sheng Yangd56f5462008-04-25 10:13:16 +08002521 exec_control |= CPU_BASED_CR3_STORE_EXITING |
Marcelo Tosatti83dbc832008-10-07 17:01:27 -03002522 CPU_BASED_CR3_LOAD_EXITING |
2523 CPU_BASED_INVLPG_EXITING;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002524 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002525
Sheng Yang83ff3b92007-11-21 14:33:25 +08002526 if (cpu_has_secondary_exec_ctrls()) {
2527 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
2528 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2529 exec_control &=
2530 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
Sheng Yang2384d2b2008-01-17 15:14:33 +08002531 if (vmx->vpid == 0)
2532 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang046d8712009-11-27 16:46:26 +08002533 if (!enable_ept) {
Sheng Yangd56f5462008-04-25 10:13:16 +08002534 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
Sheng Yang046d8712009-11-27 16:46:26 +08002535 enable_unrestricted_guest = 0;
2536 }
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002537 if (!enable_unrestricted_guest)
2538 exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002539 if (!ple_gap)
2540 exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
Sheng Yang83ff3b92007-11-21 14:33:25 +08002541 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
2542 }
Sheng Yangf78e0e22007-10-29 09:40:42 +08002543
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002544 if (ple_gap) {
2545 vmcs_write32(PLE_GAP, ple_gap);
2546 vmcs_write32(PLE_WINDOW, ple_window);
2547 }
2548
Avi Kivityc7addb92007-09-16 18:58:32 +02002549 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
2550 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002551 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
2552
Avi Kivity1c11e712010-05-03 16:05:44 +03002553 vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002554 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
2555 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
2556
2557 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
2558 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
2559 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity9581d442010-10-19 16:46:55 +02002560 vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */
2561 vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002562 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002563#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002564 rdmsrl(MSR_FS_BASE, a);
2565 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
2566 rdmsrl(MSR_GS_BASE, a);
2567 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
2568#else
2569 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
2570 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
2571#endif
2572
2573 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
2574
Wei Yongjunec687982010-03-05 12:11:48 +08002575 native_store_idt(&dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02002576 vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002577
Mike Dayd77c26f2007-10-08 09:02:08 -04002578 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
Avi Kivitycd2276a2007-05-14 20:41:13 +03002579 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03002580 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
2581 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03002582 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host));
Eddie Dong2cc51562007-05-21 07:28:09 +03002583 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity61d2ef22010-04-28 16:40:38 +03002584 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002585
2586 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
2587 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
2588 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
2589 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
2590 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
2591 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
2592
Sheng Yang468d4722008-10-09 16:01:55 +08002593 if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
2594 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2595 host_pat = msr_low | ((u64) msr_high << 32);
2596 vmcs_write64(HOST_IA32_PAT, host_pat);
2597 }
2598 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2599 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2600 host_pat = msr_low | ((u64) msr_high << 32);
2601 /* Write the default value follow host pat */
2602 vmcs_write64(GUEST_IA32_PAT, host_pat);
2603 /* Keep arch.pat sync with GUEST_IA32_PAT */
2604 vmx->vcpu.arch.pat = host_pat;
2605 }
2606
Avi Kivity6aa8b732006-12-10 02:21:36 -08002607 for (i = 0; i < NR_VMX_MSR; ++i) {
2608 u32 index = vmx_msr_index[i];
2609 u32 data_low, data_high;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002610 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002611
2612 if (rdmsr_safe(index, &data_low, &data_high) < 0)
2613 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08002614 if (wrmsr_safe(index, data_low, data_high) < 0)
2615 continue;
Avi Kivity26bb0982009-09-07 11:14:12 +03002616 vmx->guest_msrs[j].index = i;
2617 vmx->guest_msrs[j].data = 0;
Avi Kivityd5696722009-12-02 12:28:47 +02002618 vmx->guest_msrs[j].mask = -1ull;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002619 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002620 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002621
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002622 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002623
2624 /* 22.2.1, 20.8.1 */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002625 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
2626
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002627 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
Avi Kivity4c386092009-12-07 12:26:18 +02002628 vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS;
Avi Kivityce03e4f2009-12-07 12:29:14 +02002629 if (enable_ept)
2630 vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE;
Avi Kivity4c386092009-12-07 12:26:18 +02002631 vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002632
Zachary Amsden99e3e302010-08-19 22:07:17 -10002633 kvm_write_tsc(&vmx->vcpu, 0);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002634
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002635 return 0;
2636}
2637
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002638static int init_rmode(struct kvm *kvm)
2639{
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002640 int idx, ret = 0;
2641
2642 idx = srcu_read_lock(&kvm->srcu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002643 if (!init_rmode_tss(kvm))
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002644 goto exit;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002645 if (!init_rmode_identity_map(kvm))
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002646 goto exit;
2647
2648 ret = 1;
2649exit:
2650 srcu_read_unlock(&kvm->srcu, idx);
2651 return ret;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002652}
2653
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002654static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
2655{
2656 struct vcpu_vmx *vmx = to_vmx(vcpu);
2657 u64 msr;
Xiao Guangrong4b9d3a02010-06-08 10:15:51 +08002658 int ret;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002659
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002660 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002661 if (!init_rmode(vmx->vcpu.kvm)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002662 ret = -ENOMEM;
2663 goto out;
2664 }
2665
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002666 vmx->rmode.vm86_active = 0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002667
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002668 vmx->soft_vnmi_blocked = 0;
2669
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002670 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002671 kvm_set_cr8(&vmx->vcpu, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002672 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002673 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002674 msr |= MSR_IA32_APICBASE_BSP;
2675 kvm_set_apic_base(&vmx->vcpu, msr);
2676
Jan Kiszka10ab25c2010-05-25 16:01:50 +02002677 ret = fx_init(&vmx->vcpu);
2678 if (ret != 0)
2679 goto out;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002680
Avi Kivity5706be02008-08-20 15:07:31 +03002681 seg_setup(VCPU_SREG_CS);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002682 /*
2683 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2684 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2685 */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002686 if (kvm_vcpu_is_bsp(&vmx->vcpu)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002687 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
2688 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
2689 } else {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002690 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
2691 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002692 }
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002693
2694 seg_setup(VCPU_SREG_DS);
2695 seg_setup(VCPU_SREG_ES);
2696 seg_setup(VCPU_SREG_FS);
2697 seg_setup(VCPU_SREG_GS);
2698 seg_setup(VCPU_SREG_SS);
2699
2700 vmcs_write16(GUEST_TR_SELECTOR, 0);
2701 vmcs_writel(GUEST_TR_BASE, 0);
2702 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
2703 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2704
2705 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
2706 vmcs_writel(GUEST_LDTR_BASE, 0);
2707 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
2708 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
2709
2710 vmcs_write32(GUEST_SYSENTER_CS, 0);
2711 vmcs_writel(GUEST_SYSENTER_ESP, 0);
2712 vmcs_writel(GUEST_SYSENTER_EIP, 0);
2713
2714 vmcs_writel(GUEST_RFLAGS, 0x02);
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002715 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002716 kvm_rip_write(vcpu, 0xfff0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002717 else
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002718 kvm_rip_write(vcpu, 0);
2719 kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002720
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002721 vmcs_writel(GUEST_DR7, 0x400);
2722
2723 vmcs_writel(GUEST_GDTR_BASE, 0);
2724 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
2725
2726 vmcs_writel(GUEST_IDTR_BASE, 0);
2727 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
2728
2729 vmcs_write32(GUEST_ACTIVITY_STATE, 0);
2730 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
2731 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
2732
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002733 /* Special registers */
2734 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
2735
2736 setup_msrs(vmx);
2737
Avi Kivity6aa8b732006-12-10 02:21:36 -08002738 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
2739
Sheng Yangf78e0e22007-10-29 09:40:42 +08002740 if (cpu_has_vmx_tpr_shadow()) {
2741 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
2742 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
2743 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002744 page_to_phys(vmx->vcpu.arch.apic->regs_page));
Sheng Yangf78e0e22007-10-29 09:40:42 +08002745 vmcs_write32(TPR_THRESHOLD, 0);
2746 }
2747
2748 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2749 vmcs_write64(APIC_ACCESS_ADDR,
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002750 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002751
Sheng Yang2384d2b2008-01-17 15:14:33 +08002752 if (vmx->vpid != 0)
2753 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2754
Eduardo Habkostfa400522009-10-24 02:49:58 -02002755 vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
Avi Kivity4d4ec082009-12-29 18:07:30 +02002756 vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002757 vmx_set_cr4(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002758 vmx_set_efer(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002759 vmx_fpu_activate(&vmx->vcpu);
2760 update_exception_bitmap(&vmx->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002761
Gui Jianfengb9d762f2010-06-07 10:32:29 +08002762 vpid_sync_context(vmx);
Sheng Yang2384d2b2008-01-17 15:14:33 +08002763
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002764 ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002765
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002766 /* HACK: Don't enable emulation on guest boot/reset */
2767 vmx->emulation_required = 0;
2768
Avi Kivity6aa8b732006-12-10 02:21:36 -08002769out:
2770 return ret;
2771}
2772
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002773static void enable_irq_window(struct kvm_vcpu *vcpu)
2774{
2775 u32 cpu_based_vm_exec_control;
2776
2777 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2778 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2779 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2780}
2781
2782static void enable_nmi_window(struct kvm_vcpu *vcpu)
2783{
2784 u32 cpu_based_vm_exec_control;
2785
2786 if (!cpu_has_virtual_nmis()) {
2787 enable_irq_window(vcpu);
2788 return;
2789 }
2790
2791 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2792 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
2793 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2794}
2795
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002796static void vmx_inject_irq(struct kvm_vcpu *vcpu)
Eddie Dong85f455f2007-07-06 12:20:49 +03002797{
Avi Kivity9c8cba32007-11-22 11:42:59 +02002798 struct vcpu_vmx *vmx = to_vmx(vcpu);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002799 uint32_t intr;
2800 int irq = vcpu->arch.interrupt.nr;
Avi Kivity9c8cba32007-11-22 11:42:59 +02002801
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002802 trace_kvm_inj_virq(irq);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002803
Avi Kivityfa89a812008-09-01 15:57:51 +03002804 ++vcpu->stat.irq_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002805 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02002806 if (kvm_inject_realmode_interrupt(vcpu, irq) != EMULATE_DONE)
2807 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03002808 return;
2809 }
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002810 intr = irq | INTR_INFO_VALID_MASK;
2811 if (vcpu->arch.interrupt.soft) {
2812 intr |= INTR_TYPE_SOFT_INTR;
2813 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2814 vmx->vcpu.arch.event_exit_inst_len);
2815 } else
2816 intr |= INTR_TYPE_EXT_INTR;
2817 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
Eddie Dong85f455f2007-07-06 12:20:49 +03002818}
2819
Sheng Yangf08864b2008-05-15 18:23:25 +08002820static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
2821{
Jan Kiszka66a5a342008-09-26 09:30:51 +02002822 struct vcpu_vmx *vmx = to_vmx(vcpu);
2823
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002824 if (!cpu_has_virtual_nmis()) {
2825 /*
2826 * Tracking the NMI-blocked state in software is built upon
2827 * finding the next open IRQ window. This, in turn, depends on
2828 * well-behaving guests: They have to keep IRQs disabled at
2829 * least as long as the NMI handler runs. Otherwise we may
2830 * cause NMI nesting, maybe breaking the guest. But as this is
2831 * highly unlikely, we can live with the residual risk.
2832 */
2833 vmx->soft_vnmi_blocked = 1;
2834 vmx->vnmi_blocked_time = 0;
2835 }
2836
Jan Kiszka487b3912008-09-26 09:30:56 +02002837 ++vcpu->stat.nmi_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002838 if (vmx->rmode.vm86_active) {
Mohammed Gamala92601b2010-09-19 14:34:07 +02002839 if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR) != EMULATE_DONE)
2840 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Jan Kiszka66a5a342008-09-26 09:30:51 +02002841 return;
2842 }
Sheng Yangf08864b2008-05-15 18:23:25 +08002843 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2844 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
Sheng Yangf08864b2008-05-15 18:23:25 +08002845}
2846
Gleb Natapovc4282df2009-04-21 17:45:07 +03002847static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
Jan Kiszka33f089c2008-09-26 09:30:49 +02002848{
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002849 if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
Gleb Natapovc4282df2009-04-21 17:45:07 +03002850 return 0;
Jan Kiszka33f089c2008-09-26 09:30:49 +02002851
Gleb Natapovc4282df2009-04-21 17:45:07 +03002852 return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
Jan Kiszkaf8c5fae2010-05-11 15:16:46 +02002853 (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_NMI));
Jan Kiszka33f089c2008-09-26 09:30:49 +02002854}
2855
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002856static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
2857{
2858 if (!cpu_has_virtual_nmis())
2859 return to_vmx(vcpu)->soft_vnmi_blocked;
Avi Kivityc332c832010-05-04 12:24:12 +03002860 return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002861}
2862
2863static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
2864{
2865 struct vcpu_vmx *vmx = to_vmx(vcpu);
2866
2867 if (!cpu_has_virtual_nmis()) {
2868 if (vmx->soft_vnmi_blocked != masked) {
2869 vmx->soft_vnmi_blocked = masked;
2870 vmx->vnmi_blocked_time = 0;
2871 }
2872 } else {
2873 if (masked)
2874 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
2875 GUEST_INTR_STATE_NMI);
2876 else
2877 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
2878 GUEST_INTR_STATE_NMI);
2879 }
2880}
2881
Gleb Natapov78646122009-03-23 12:12:11 +02002882static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
2883{
Gleb Natapovc4282df2009-04-21 17:45:07 +03002884 return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
2885 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2886 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
Gleb Natapov78646122009-03-23 12:12:11 +02002887}
2888
Izik Eiduscbc94022007-10-25 00:29:55 +02002889static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
2890{
2891 int ret;
2892 struct kvm_userspace_memory_region tss_mem = {
Sheng Yang6fe63972008-10-16 17:30:58 +08002893 .slot = TSS_PRIVATE_MEMSLOT,
Izik Eiduscbc94022007-10-25 00:29:55 +02002894 .guest_phys_addr = addr,
2895 .memory_size = PAGE_SIZE * 3,
2896 .flags = 0,
2897 };
2898
2899 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
2900 if (ret)
2901 return ret;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002902 kvm->arch.tss_addr = addr;
Izik Eiduscbc94022007-10-25 00:29:55 +02002903 return 0;
2904}
2905
Avi Kivity6aa8b732006-12-10 02:21:36 -08002906static int handle_rmode_exception(struct kvm_vcpu *vcpu,
2907 int vec, u32 err_code)
2908{
Nitin A Kambleb3f37702007-05-17 15:50:34 +03002909 /*
2910 * Instruction with address size override prefix opcode 0x67
2911 * Cause the #SS fault with 0 error code in VM86 mode.
2912 */
2913 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Avi Kivity851ba692009-08-24 11:10:17 +03002914 if (emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002915 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002916 /*
2917 * Forward all other exceptions that are valid in real mode.
2918 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
2919 * the required debugging infrastructure rework.
2920 */
2921 switch (vec) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002922 case DB_VECTOR:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002923 if (vcpu->guest_debug &
2924 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
2925 return 0;
2926 kvm_queue_exception(vcpu, vec);
2927 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002928 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01002929 /*
2930 * Update instruction length as we may reinject the exception
2931 * from user space while in guest debugging mode.
2932 */
2933 to_vmx(vcpu)->vcpu.arch.event_exit_inst_len =
2934 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002935 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2936 return 0;
2937 /* fall through */
2938 case DE_VECTOR:
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002939 case OF_VECTOR:
2940 case BR_VECTOR:
2941 case UD_VECTOR:
2942 case DF_VECTOR:
2943 case SS_VECTOR:
2944 case GP_VECTOR:
2945 case MF_VECTOR:
2946 kvm_queue_exception(vcpu, vec);
2947 return 1;
2948 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002949 return 0;
2950}
2951
Andi Kleena0861c02009-06-08 17:37:09 +08002952/*
2953 * Trigger machine check on the host. We assume all the MSRs are already set up
2954 * by the CPU and that we still run on the same CPU as the MCE occurred on.
2955 * We pass a fake environment to the machine check handler because we want
2956 * the guest to be always treated like user space, no matter what context
2957 * it used internally.
2958 */
2959static void kvm_machine_check(void)
2960{
2961#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
2962 struct pt_regs regs = {
2963 .cs = 3, /* Fake ring 3 no matter what the guest ran on */
2964 .flags = X86_EFLAGS_IF,
2965 };
2966
2967 do_machine_check(&regs, 0);
2968#endif
2969}
2970
Avi Kivity851ba692009-08-24 11:10:17 +03002971static int handle_machine_check(struct kvm_vcpu *vcpu)
Andi Kleena0861c02009-06-08 17:37:09 +08002972{
2973 /* already handled by vcpu_run */
2974 return 1;
2975}
2976
Avi Kivity851ba692009-08-24 11:10:17 +03002977static int handle_exception(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002978{
Avi Kivity1155f762007-11-22 11:30:47 +02002979 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03002980 struct kvm_run *kvm_run = vcpu->run;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002981 u32 intr_info, ex_no, error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01002982 unsigned long cr2, rip, dr6;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002983 u32 vect_info;
2984 enum emulation_result er;
2985
Avi Kivity1155f762007-11-22 11:30:47 +02002986 vect_info = vmx->idt_vectoring_info;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002987 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
2988
Andi Kleena0861c02009-06-08 17:37:09 +08002989 if (is_machine_check(intr_info))
Avi Kivity851ba692009-08-24 11:10:17 +03002990 return handle_machine_check(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08002991
Avi Kivity6aa8b732006-12-10 02:21:36 -08002992 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
Avi Kivity65ac7262009-11-04 11:59:01 +02002993 !is_page_fault(intr_info)) {
2994 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2995 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX;
2996 vcpu->run->internal.ndata = 2;
2997 vcpu->run->internal.data[0] = vect_info;
2998 vcpu->run->internal.data[1] = intr_info;
2999 return 0;
3000 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003001
Jan Kiszkae4a41882008-09-26 09:30:46 +02003002 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
Avi Kivity1b6269d2007-10-09 12:12:19 +02003003 return 1; /* already handled by vmx_vcpu_run() */
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003004
3005 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03003006 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03003007 return 1;
3008 }
3009
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003010 if (is_invalid_opcode(intr_info)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003011 er = emulate_instruction(vcpu, 0, 0, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003012 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02003013 kvm_queue_exception(vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003014 return 1;
3015 }
3016
Avi Kivity6aa8b732006-12-10 02:21:36 -08003017 error_code = 0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003018 rip = kvm_rip_read(vcpu);
Ryan Harper2e113842008-02-11 10:26:38 -06003019 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003020 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
3021 if (is_page_fault(intr_info)) {
Sheng Yang14394422008-04-28 12:24:45 +08003022 /* EPT won't cause page fault directly */
Avi Kivity089d0342009-03-23 18:26:32 +02003023 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08003024 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -08003025 cr2 = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003026 trace_kvm_page_fault(cr2, error_code);
3027
Gleb Natapov3298b752009-05-11 13:35:46 +03003028 if (kvm_event_needs_reinjection(vcpu))
Avi Kivity577bdc42008-07-19 08:57:05 +03003029 kvm_mmu_unprotect_page_virt(vcpu, cr2);
Avi Kivity30677142007-10-28 18:48:59 +02003030 return kvm_mmu_page_fault(vcpu, cr2, error_code);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003031 }
3032
Avi Kivity7ffd92c2009-06-09 14:10:45 +03003033 if (vmx->rmode.vm86_active &&
Avi Kivity6aa8b732006-12-10 02:21:36 -08003034 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003035 error_code)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003036 if (vcpu->arch.halt_request) {
3037 vcpu->arch.halt_request = 0;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003038 return kvm_emulate_halt(vcpu);
3039 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003040 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03003041 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003042
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003043 ex_no = intr_info & INTR_INFO_VECTOR_MASK;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003044 switch (ex_no) {
3045 case DB_VECTOR:
3046 dr6 = vmcs_readl(EXIT_QUALIFICATION);
3047 if (!(vcpu->guest_debug &
3048 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
3049 vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
3050 kvm_queue_exception(vcpu, DB_VECTOR);
3051 return 1;
3052 }
3053 kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
3054 kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
3055 /* fall through */
3056 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01003057 /*
3058 * Update instruction length as we may reinject #BP from
3059 * user space while in guest debugging mode. Reading it for
3060 * #DB as well causes no harm, it is not used in that case.
3061 */
3062 vmx->vcpu.arch.event_exit_inst_len =
3063 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003064 kvm_run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003065 kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
3066 kvm_run->debug.arch.exception = ex_no;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003067 break;
3068 default:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003069 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
3070 kvm_run->ex.exception = ex_no;
3071 kvm_run->ex.error_code = error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003072 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003073 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003074 return 0;
3075}
3076
Avi Kivity851ba692009-08-24 11:10:17 +03003077static int handle_external_interrupt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003078{
Avi Kivity1165f5f2007-04-19 17:27:43 +03003079 ++vcpu->stat.irq_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003080 return 1;
3081}
3082
Avi Kivity851ba692009-08-24 11:10:17 +03003083static int handle_triple_fault(struct kvm_vcpu *vcpu)
Avi Kivity988ad742007-02-12 00:54:36 -08003084{
Avi Kivity851ba692009-08-24 11:10:17 +03003085 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Avi Kivity988ad742007-02-12 00:54:36 -08003086 return 0;
3087}
Avi Kivity6aa8b732006-12-10 02:21:36 -08003088
Avi Kivity851ba692009-08-24 11:10:17 +03003089static int handle_io(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003090{
He, Qingbfdaab02007-09-12 14:18:28 +08003091 unsigned long exit_qualification;
Jan Kiszka34c33d12009-02-08 13:28:15 +01003092 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02003093 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003094
He, Qingbfdaab02007-09-12 14:18:28 +08003095 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02003096 string = (exit_qualification & 16) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03003097 in = (exit_qualification & 8) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03003098
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003099 ++vcpu->stat.io_exits;
3100
3101 if (string || in)
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03003102 return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003103
3104 port = exit_qualification >> 16;
3105 size = (exit_qualification & 7) + 1;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01003106 skip_emulated_instruction(vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003107
3108 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003109}
3110
Ingo Molnar102d8322007-02-19 14:37:47 +02003111static void
3112vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3113{
3114 /*
3115 * Patch in the VMCALL instruction:
3116 */
3117 hypercall[0] = 0x0f;
3118 hypercall[1] = 0x01;
3119 hypercall[2] = 0xc1;
Ingo Molnar102d8322007-02-19 14:37:47 +02003120}
3121
Avi Kivity49a9b072010-06-10 17:02:14 +03003122static void complete_insn_gp(struct kvm_vcpu *vcpu, int err)
3123{
3124 if (err)
3125 kvm_inject_gp(vcpu, 0);
3126 else
3127 skip_emulated_instruction(vcpu);
3128}
3129
Avi Kivity851ba692009-08-24 11:10:17 +03003130static int handle_cr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003131{
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003132 unsigned long exit_qualification, val;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003133 int cr;
3134 int reg;
Avi Kivity49a9b072010-06-10 17:02:14 +03003135 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003136
He, Qingbfdaab02007-09-12 14:18:28 +08003137 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003138 cr = exit_qualification & 15;
3139 reg = (exit_qualification >> 8) & 15;
3140 switch ((exit_qualification >> 4) & 3) {
3141 case 0: /* mov to cr */
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003142 val = kvm_register_read(vcpu, reg);
3143 trace_kvm_cr_write(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003144 switch (cr) {
3145 case 0:
Avi Kivity49a9b072010-06-10 17:02:14 +03003146 err = kvm_set_cr0(vcpu, val);
3147 complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003148 return 1;
3149 case 3:
Avi Kivity23902182010-06-10 17:02:16 +03003150 err = kvm_set_cr3(vcpu, val);
3151 complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003152 return 1;
3153 case 4:
Avi Kivitya83b29c2010-06-10 17:02:15 +03003154 err = kvm_set_cr4(vcpu, val);
3155 complete_insn_gp(vcpu, err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003156 return 1;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003157 case 8: {
3158 u8 cr8_prev = kvm_get_cr8(vcpu);
3159 u8 cr8 = kvm_register_read(vcpu, reg);
3160 kvm_set_cr8(vcpu, cr8);
3161 skip_emulated_instruction(vcpu);
3162 if (irqchip_in_kernel(vcpu->kvm))
3163 return 1;
3164 if (cr8_prev <= cr8)
3165 return 1;
Avi Kivity851ba692009-08-24 11:10:17 +03003166 vcpu->run->exit_reason = KVM_EXIT_SET_TPR;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003167 return 0;
3168 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003169 };
3170 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03003171 case 2: /* clts */
Avi Kivityedcafe32009-12-30 18:07:40 +02003172 vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
Avi Kivity4d4ec082009-12-29 18:07:30 +02003173 trace_kvm_cr_write(0, kvm_read_cr0(vcpu));
Anthony Liguori25c4c272007-04-27 09:29:21 +03003174 skip_emulated_instruction(vcpu);
Avi Kivity6b52d182010-01-21 15:31:47 +02003175 vmx_fpu_activate(vcpu);
Anthony Liguori25c4c272007-04-27 09:29:21 +03003176 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003177 case 1: /*mov from cr*/
3178 switch (cr) {
3179 case 3:
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003180 kvm_register_write(vcpu, reg, vcpu->arch.cr3);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003181 trace_kvm_cr_read(cr, vcpu->arch.cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003182 skip_emulated_instruction(vcpu);
3183 return 1;
3184 case 8:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003185 val = kvm_get_cr8(vcpu);
3186 kvm_register_write(vcpu, reg, val);
3187 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003188 skip_emulated_instruction(vcpu);
3189 return 1;
3190 }
3191 break;
3192 case 3: /* lmsw */
Avi Kivitya1f83a72009-12-29 17:33:58 +02003193 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
Avi Kivity4d4ec082009-12-29 18:07:30 +02003194 trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val);
Avi Kivitya1f83a72009-12-29 17:33:58 +02003195 kvm_lmsw(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003196
3197 skip_emulated_instruction(vcpu);
3198 return 1;
3199 default:
3200 break;
3201 }
Avi Kivity851ba692009-08-24 11:10:17 +03003202 vcpu->run->exit_reason = 0;
Rusty Russellf0242472007-08-01 10:48:02 +10003203 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -08003204 (int)(exit_qualification >> 4) & 3, cr);
3205 return 0;
3206}
3207
Avi Kivity851ba692009-08-24 11:10:17 +03003208static int handle_dr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003209{
He, Qingbfdaab02007-09-12 14:18:28 +08003210 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003211 int dr, reg;
3212
Jan Kiszkaf2483412010-01-20 18:20:20 +01003213 /* Do not handle if the CPL > 0, will trigger GP on re-entry */
Avi Kivity0a79b002009-09-01 12:03:25 +03003214 if (!kvm_require_cpl(vcpu, 0))
3215 return 1;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003216 dr = vmcs_readl(GUEST_DR7);
3217 if (dr & DR7_GD) {
3218 /*
3219 * As the vm-exit takes precedence over the debug trap, we
3220 * need to emulate the latter, either for the host or the
3221 * guest debugging itself.
3222 */
3223 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Avi Kivity851ba692009-08-24 11:10:17 +03003224 vcpu->run->debug.arch.dr6 = vcpu->arch.dr6;
3225 vcpu->run->debug.arch.dr7 = dr;
3226 vcpu->run->debug.arch.pc =
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003227 vmcs_readl(GUEST_CS_BASE) +
3228 vmcs_readl(GUEST_RIP);
Avi Kivity851ba692009-08-24 11:10:17 +03003229 vcpu->run->debug.arch.exception = DB_VECTOR;
3230 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003231 return 0;
3232 } else {
3233 vcpu->arch.dr7 &= ~DR7_GD;
3234 vcpu->arch.dr6 |= DR6_BD;
3235 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
3236 kvm_queue_exception(vcpu, DB_VECTOR);
3237 return 1;
3238 }
3239 }
3240
He, Qingbfdaab02007-09-12 14:18:28 +08003241 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003242 dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
3243 reg = DEBUG_REG_ACCESS_REG(exit_qualification);
3244 if (exit_qualification & TYPE_MOV_FROM_DR) {
Gleb Natapov020df072010-04-13 10:05:23 +03003245 unsigned long val;
3246 if (!kvm_get_dr(vcpu, dr, &val))
3247 kvm_register_write(vcpu, reg, val);
3248 } else
3249 kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003250 skip_emulated_instruction(vcpu);
3251 return 1;
3252}
3253
Gleb Natapov020df072010-04-13 10:05:23 +03003254static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
3255{
3256 vmcs_writel(GUEST_DR7, val);
3257}
3258
Avi Kivity851ba692009-08-24 11:10:17 +03003259static int handle_cpuid(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003260{
Avi Kivity06465c52007-02-28 20:46:53 +02003261 kvm_emulate_cpuid(vcpu);
3262 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003263}
3264
Avi Kivity851ba692009-08-24 11:10:17 +03003265static int handle_rdmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003266{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003267 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08003268 u64 data;
3269
3270 if (vmx_get_msr(vcpu, ecx, &data)) {
Avi Kivity59200272010-01-25 19:47:02 +02003271 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003272 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003273 return 1;
3274 }
3275
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003276 trace_kvm_msr_read(ecx, data);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003277
Avi Kivity6aa8b732006-12-10 02:21:36 -08003278 /* FIXME: handling of bits 32:63 of rax, rdx */
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003279 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
3280 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003281 skip_emulated_instruction(vcpu);
3282 return 1;
3283}
3284
Avi Kivity851ba692009-08-24 11:10:17 +03003285static int handle_wrmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003286{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003287 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
3288 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
3289 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003290
3291 if (vmx_set_msr(vcpu, ecx, data) != 0) {
Avi Kivity59200272010-01-25 19:47:02 +02003292 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003293 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003294 return 1;
3295 }
3296
Avi Kivity59200272010-01-25 19:47:02 +02003297 trace_kvm_msr_write(ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003298 skip_emulated_instruction(vcpu);
3299 return 1;
3300}
3301
Avi Kivity851ba692009-08-24 11:10:17 +03003302static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003303{
Avi Kivity3842d132010-07-27 12:30:24 +03003304 kvm_make_request(KVM_REQ_EVENT, vcpu);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003305 return 1;
3306}
3307
Avi Kivity851ba692009-08-24 11:10:17 +03003308static int handle_interrupt_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003309{
Eddie Dong85f455f2007-07-06 12:20:49 +03003310 u32 cpu_based_vm_exec_control;
3311
3312 /* clear pending irq */
3313 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3314 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
3315 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003316
Avi Kivity3842d132010-07-27 12:30:24 +03003317 kvm_make_request(KVM_REQ_EVENT, vcpu);
3318
Jan Kiszkaa26bf122008-09-26 09:30:45 +02003319 ++vcpu->stat.irq_window_exits;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003320
Dor Laorc1150d82007-01-05 16:36:24 -08003321 /*
3322 * If the user space waits to inject interrupts, exit as soon as
3323 * possible
3324 */
Gleb Natapov80618232009-04-21 17:44:56 +03003325 if (!irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03003326 vcpu->run->request_interrupt_window &&
Gleb Natapov80618232009-04-21 17:44:56 +03003327 !kvm_cpu_has_interrupt(vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003328 vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Dor Laorc1150d82007-01-05 16:36:24 -08003329 return 0;
3330 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003331 return 1;
3332}
3333
Avi Kivity851ba692009-08-24 11:10:17 +03003334static int handle_halt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003335{
3336 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03003337 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003338}
3339
Avi Kivity851ba692009-08-24 11:10:17 +03003340static int handle_vmcall(struct kvm_vcpu *vcpu)
Ingo Molnarc21415e2007-02-19 14:37:47 +02003341{
Dor Laor510043d2007-02-19 18:25:43 +02003342 skip_emulated_instruction(vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003343 kvm_emulate_hypercall(vcpu);
3344 return 1;
Ingo Molnarc21415e2007-02-19 14:37:47 +02003345}
3346
Avi Kivity851ba692009-08-24 11:10:17 +03003347static int handle_vmx_insn(struct kvm_vcpu *vcpu)
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003348{
3349 kvm_queue_exception(vcpu, UD_VECTOR);
3350 return 1;
3351}
3352
Avi Kivity851ba692009-08-24 11:10:17 +03003353static int handle_invlpg(struct kvm_vcpu *vcpu)
Marcelo Tosattia7052892008-09-23 13:18:35 -03003354{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003355 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosattia7052892008-09-23 13:18:35 -03003356
3357 kvm_mmu_invlpg(vcpu, exit_qualification);
3358 skip_emulated_instruction(vcpu);
3359 return 1;
3360}
3361
Avi Kivity851ba692009-08-24 11:10:17 +03003362static int handle_wbinvd(struct kvm_vcpu *vcpu)
Eddie Donge5edaa02007-11-11 12:28:35 +02003363{
3364 skip_emulated_instruction(vcpu);
Sheng Yangf5f48ee2010-06-30 12:25:15 +08003365 kvm_emulate_wbinvd(vcpu);
Eddie Donge5edaa02007-11-11 12:28:35 +02003366 return 1;
3367}
3368
Dexuan Cui2acf9232010-06-10 11:27:12 +08003369static int handle_xsetbv(struct kvm_vcpu *vcpu)
3370{
3371 u64 new_bv = kvm_read_edx_eax(vcpu);
3372 u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
3373
3374 if (kvm_set_xcr(vcpu, index, new_bv) == 0)
3375 skip_emulated_instruction(vcpu);
3376 return 1;
3377}
3378
Avi Kivity851ba692009-08-24 11:10:17 +03003379static int handle_apic_access(struct kvm_vcpu *vcpu)
Sheng Yangf78e0e22007-10-29 09:40:42 +08003380{
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03003381 return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE;
Sheng Yangf78e0e22007-10-29 09:40:42 +08003382}
3383
Avi Kivity851ba692009-08-24 11:10:17 +03003384static int handle_task_switch(struct kvm_vcpu *vcpu)
Izik Eidus37817f22008-03-24 23:14:53 +02003385{
Jan Kiszka60637aa2008-09-26 09:30:47 +02003386 struct vcpu_vmx *vmx = to_vmx(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02003387 unsigned long exit_qualification;
Jan Kiszkae269fb22010-04-14 15:51:09 +02003388 bool has_error_code = false;
3389 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02003390 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003391 int reason, type, idt_v;
3392
3393 idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
3394 type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
Izik Eidus37817f22008-03-24 23:14:53 +02003395
3396 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
3397
3398 reason = (u32)exit_qualification >> 30;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003399 if (reason == TASK_SWITCH_GATE && idt_v) {
3400 switch (type) {
3401 case INTR_TYPE_NMI_INTR:
3402 vcpu->arch.nmi_injected = false;
3403 if (cpu_has_virtual_nmis())
3404 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3405 GUEST_INTR_STATE_NMI);
3406 break;
3407 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003408 case INTR_TYPE_SOFT_INTR:
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003409 kvm_clear_interrupt_queue(vcpu);
3410 break;
3411 case INTR_TYPE_HARD_EXCEPTION:
Jan Kiszkae269fb22010-04-14 15:51:09 +02003412 if (vmx->idt_vectoring_info &
3413 VECTORING_INFO_DELIVER_CODE_MASK) {
3414 has_error_code = true;
3415 error_code =
3416 vmcs_read32(IDT_VECTORING_ERROR_CODE);
3417 }
3418 /* fall through */
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003419 case INTR_TYPE_SOFT_EXCEPTION:
3420 kvm_clear_exception_queue(vcpu);
3421 break;
3422 default:
3423 break;
3424 }
Jan Kiszka60637aa2008-09-26 09:30:47 +02003425 }
Izik Eidus37817f22008-03-24 23:14:53 +02003426 tss_selector = exit_qualification;
3427
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003428 if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION &&
3429 type != INTR_TYPE_EXT_INTR &&
3430 type != INTR_TYPE_NMI_INTR))
3431 skip_emulated_instruction(vcpu);
3432
Gleb Natapovacb54512010-04-15 21:03:50 +03003433 if (kvm_task_switch(vcpu, tss_selector, reason,
3434 has_error_code, error_code) == EMULATE_FAIL) {
3435 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3436 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
3437 vcpu->run->internal.ndata = 0;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003438 return 0;
Gleb Natapovacb54512010-04-15 21:03:50 +03003439 }
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003440
3441 /* clear all local breakpoint enable flags */
3442 vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
3443
3444 /*
3445 * TODO: What about debug traps on tss switch?
3446 * Are we supposed to inject them and update dr6?
3447 */
3448
3449 return 1;
Izik Eidus37817f22008-03-24 23:14:53 +02003450}
3451
Avi Kivity851ba692009-08-24 11:10:17 +03003452static int handle_ept_violation(struct kvm_vcpu *vcpu)
Sheng Yang14394422008-04-28 12:24:45 +08003453{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003454 unsigned long exit_qualification;
Sheng Yang14394422008-04-28 12:24:45 +08003455 gpa_t gpa;
Sheng Yang14394422008-04-28 12:24:45 +08003456 int gla_validity;
Sheng Yang14394422008-04-28 12:24:45 +08003457
Sheng Yangf9c617f2009-03-25 10:08:52 +08003458 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Sheng Yang14394422008-04-28 12:24:45 +08003459
3460 if (exit_qualification & (1 << 6)) {
3461 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
Jan Kiszka7f582ab2009-07-22 23:53:01 +02003462 return -EINVAL;
Sheng Yang14394422008-04-28 12:24:45 +08003463 }
3464
3465 gla_validity = (exit_qualification >> 7) & 0x3;
3466 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
3467 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
3468 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
3469 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
Sheng Yangf9c617f2009-03-25 10:08:52 +08003470 vmcs_readl(GUEST_LINEAR_ADDRESS));
Sheng Yang14394422008-04-28 12:24:45 +08003471 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
3472 (long unsigned int)exit_qualification);
Avi Kivity851ba692009-08-24 11:10:17 +03003473 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3474 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION;
Avi Kivity596ae892009-06-03 14:12:10 +03003475 return 0;
Sheng Yang14394422008-04-28 12:24:45 +08003476 }
3477
3478 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003479 trace_kvm_page_fault(gpa, exit_qualification);
Sheng Yang49cd7d22009-02-11 13:50:40 +08003480 return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
Sheng Yang14394422008-04-28 12:24:45 +08003481}
3482
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003483static u64 ept_rsvd_mask(u64 spte, int level)
3484{
3485 int i;
3486 u64 mask = 0;
3487
3488 for (i = 51; i > boot_cpu_data.x86_phys_bits; i--)
3489 mask |= (1ULL << i);
3490
3491 if (level > 2)
3492 /* bits 7:3 reserved */
3493 mask |= 0xf8;
3494 else if (level == 2) {
3495 if (spte & (1ULL << 7))
3496 /* 2MB ref, bits 20:12 reserved */
3497 mask |= 0x1ff000;
3498 else
3499 /* bits 6:3 reserved */
3500 mask |= 0x78;
3501 }
3502
3503 return mask;
3504}
3505
3506static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte,
3507 int level)
3508{
3509 printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level);
3510
3511 /* 010b (write-only) */
3512 WARN_ON((spte & 0x7) == 0x2);
3513
3514 /* 110b (write/execute) */
3515 WARN_ON((spte & 0x7) == 0x6);
3516
3517 /* 100b (execute-only) and value not supported by logical processor */
3518 if (!cpu_has_vmx_ept_execute_only())
3519 WARN_ON((spte & 0x7) == 0x4);
3520
3521 /* not 000b */
3522 if ((spte & 0x7)) {
3523 u64 rsvd_bits = spte & ept_rsvd_mask(spte, level);
3524
3525 if (rsvd_bits != 0) {
3526 printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n",
3527 __func__, rsvd_bits);
3528 WARN_ON(1);
3529 }
3530
3531 if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) {
3532 u64 ept_mem_type = (spte & 0x38) >> 3;
3533
3534 if (ept_mem_type == 2 || ept_mem_type == 3 ||
3535 ept_mem_type == 7) {
3536 printk(KERN_ERR "%s: ept_mem_type=0x%llx\n",
3537 __func__, ept_mem_type);
3538 WARN_ON(1);
3539 }
3540 }
3541 }
3542}
3543
Avi Kivity851ba692009-08-24 11:10:17 +03003544static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003545{
3546 u64 sptes[4];
3547 int nr_sptes, i;
3548 gpa_t gpa;
3549
3550 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
3551
3552 printk(KERN_ERR "EPT: Misconfiguration.\n");
3553 printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa);
3554
3555 nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes);
3556
3557 for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i)
3558 ept_misconfig_inspect_spte(vcpu, sptes[i-1], i);
3559
Avi Kivity851ba692009-08-24 11:10:17 +03003560 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3561 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003562
3563 return 0;
3564}
3565
Avi Kivity851ba692009-08-24 11:10:17 +03003566static int handle_nmi_window(struct kvm_vcpu *vcpu)
Sheng Yangf08864b2008-05-15 18:23:25 +08003567{
3568 u32 cpu_based_vm_exec_control;
3569
3570 /* clear pending NMI */
3571 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3572 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
3573 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
3574 ++vcpu->stat.nmi_window_exits;
Avi Kivity3842d132010-07-27 12:30:24 +03003575 kvm_make_request(KVM_REQ_EVENT, vcpu);
Sheng Yangf08864b2008-05-15 18:23:25 +08003576
3577 return 1;
3578}
3579
Mohammed Gamal80ced182009-09-01 12:48:18 +02003580static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003581{
Avi Kivity8b3079a2009-01-05 12:10:54 +02003582 struct vcpu_vmx *vmx = to_vmx(vcpu);
3583 enum emulation_result err = EMULATE_DONE;
Mohammed Gamal80ced182009-09-01 12:48:18 +02003584 int ret = 1;
Avi Kivity49e9d552010-09-19 14:34:08 +02003585 u32 cpu_exec_ctrl;
3586 bool intr_window_requested;
3587
3588 cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3589 intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003590
3591 while (!guest_state_valid(vcpu)) {
Avi Kivity49e9d552010-09-19 14:34:08 +02003592 if (intr_window_requested
3593 && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF))
3594 return handle_interrupt_window(&vmx->vcpu);
3595
Avi Kivity851ba692009-08-24 11:10:17 +03003596 err = emulate_instruction(vcpu, 0, 0, 0);
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003597
Mohammed Gamal80ced182009-09-01 12:48:18 +02003598 if (err == EMULATE_DO_MMIO) {
3599 ret = 0;
3600 goto out;
3601 }
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003602
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03003603 if (err != EMULATE_DONE)
3604 return 0;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003605
3606 if (signal_pending(current))
Mohammed Gamal80ced182009-09-01 12:48:18 +02003607 goto out;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003608 if (need_resched())
3609 schedule();
3610 }
3611
Mohammed Gamal80ced182009-09-01 12:48:18 +02003612 vmx->emulation_required = 0;
3613out:
3614 return ret;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003615}
3616
Avi Kivity6aa8b732006-12-10 02:21:36 -08003617/*
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003618 * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE
3619 * exiting, so only get here on cpu with PAUSE-Loop-Exiting.
3620 */
Marcelo Tosatti9fb41ba2009-10-12 19:37:31 -03003621static int handle_pause(struct kvm_vcpu *vcpu)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003622{
3623 skip_emulated_instruction(vcpu);
3624 kvm_vcpu_on_spin(vcpu);
3625
3626 return 1;
3627}
3628
Sheng Yang59708672009-12-15 13:29:54 +08003629static int handle_invalid_op(struct kvm_vcpu *vcpu)
3630{
3631 kvm_queue_exception(vcpu, UD_VECTOR);
3632 return 1;
3633}
3634
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003635/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08003636 * The exit handlers return 1 if the exit was handled fully and guest execution
3637 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
3638 * to be done to userspace and return 0.
3639 */
Avi Kivity851ba692009-08-24 11:10:17 +03003640static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08003641 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
3642 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08003643 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Sheng Yangf08864b2008-05-15 18:23:25 +08003644 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003645 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003646 [EXIT_REASON_CR_ACCESS] = handle_cr,
3647 [EXIT_REASON_DR_ACCESS] = handle_dr,
3648 [EXIT_REASON_CPUID] = handle_cpuid,
3649 [EXIT_REASON_MSR_READ] = handle_rdmsr,
3650 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
3651 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
3652 [EXIT_REASON_HLT] = handle_halt,
Marcelo Tosattia7052892008-09-23 13:18:35 -03003653 [EXIT_REASON_INVLPG] = handle_invlpg,
Ingo Molnarc21415e2007-02-19 14:37:47 +02003654 [EXIT_REASON_VMCALL] = handle_vmcall,
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003655 [EXIT_REASON_VMCLEAR] = handle_vmx_insn,
3656 [EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
3657 [EXIT_REASON_VMPTRLD] = handle_vmx_insn,
3658 [EXIT_REASON_VMPTRST] = handle_vmx_insn,
3659 [EXIT_REASON_VMREAD] = handle_vmx_insn,
3660 [EXIT_REASON_VMRESUME] = handle_vmx_insn,
3661 [EXIT_REASON_VMWRITE] = handle_vmx_insn,
3662 [EXIT_REASON_VMOFF] = handle_vmx_insn,
3663 [EXIT_REASON_VMON] = handle_vmx_insn,
Sheng Yangf78e0e22007-10-29 09:40:42 +08003664 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
3665 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
Eddie Donge5edaa02007-11-11 12:28:35 +02003666 [EXIT_REASON_WBINVD] = handle_wbinvd,
Dexuan Cui2acf9232010-06-10 11:27:12 +08003667 [EXIT_REASON_XSETBV] = handle_xsetbv,
Izik Eidus37817f22008-03-24 23:14:53 +02003668 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
Andi Kleena0861c02009-06-08 17:37:09 +08003669 [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check,
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003670 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
3671 [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig,
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003672 [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause,
Sheng Yang59708672009-12-15 13:29:54 +08003673 [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op,
3674 [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003675};
3676
3677static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04003678 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003679
3680/*
3681 * The guest has exited. See if we can fix it or if we need userspace
3682 * assistance.
3683 */
Avi Kivity851ba692009-08-24 11:10:17 +03003684static int vmx_handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003685{
Avi Kivity29bd8a72007-09-10 17:27:03 +03003686 struct vcpu_vmx *vmx = to_vmx(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003687 u32 exit_reason = vmx->exit_reason;
Avi Kivity1155f762007-11-22 11:30:47 +02003688 u32 vectoring_info = vmx->idt_vectoring_info;
Avi Kivity29bd8a72007-09-10 17:27:03 +03003689
Avi Kivity5bfd8b52010-03-11 10:50:44 +02003690 trace_kvm_exit(exit_reason, vcpu);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003691
Mohammed Gamal80ced182009-09-01 12:48:18 +02003692 /* If guest state is invalid, start emulating */
3693 if (vmx->emulation_required && emulate_invalid_guest_state)
3694 return handle_invalid_guest_state(vcpu);
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003695
Sheng Yang14394422008-04-28 12:24:45 +08003696 /* Access CR3 don't cause VMExit in paging mode, so we need
3697 * to sync with guest real CR3. */
Avi Kivity6de4f3a2009-05-31 22:58:47 +03003698 if (enable_ept && is_paging(vcpu))
Sheng Yang14394422008-04-28 12:24:45 +08003699 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
Sheng Yang14394422008-04-28 12:24:45 +08003700
Mohammed Gamal51207022010-05-31 22:40:54 +03003701 if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) {
3702 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3703 vcpu->run->fail_entry.hardware_entry_failure_reason
3704 = exit_reason;
3705 return 0;
3706 }
3707
Avi Kivity29bd8a72007-09-10 17:27:03 +03003708 if (unlikely(vmx->fail)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003709 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3710 vcpu->run->fail_entry.hardware_entry_failure_reason
Avi Kivity29bd8a72007-09-10 17:27:03 +03003711 = vmcs_read32(VM_INSTRUCTION_ERROR);
3712 return 0;
3713 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003714
Mike Dayd77c26f2007-10-08 09:02:08 -04003715 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
Sheng Yang14394422008-04-28 12:24:45 +08003716 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
Jan Kiszka60637aa2008-09-26 09:30:47 +02003717 exit_reason != EXIT_REASON_EPT_VIOLATION &&
3718 exit_reason != EXIT_REASON_TASK_SWITCH))
3719 printk(KERN_WARNING "%s: unexpected, valid vectoring info "
3720 "(0x%x) and exit reason is 0x%x\n",
3721 __func__, vectoring_info, exit_reason);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003722
3723 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) {
Gleb Natapovc4282df2009-04-21 17:45:07 +03003724 if (vmx_interrupt_allowed(vcpu)) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003725 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003726 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
Jan Kiszka45312202008-12-11 16:54:54 +01003727 vcpu->arch.nmi_pending) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003728 /*
3729 * This CPU don't support us in finding the end of an
3730 * NMI-blocked window if the guest runs with IRQs
3731 * disabled. So we pull the trigger after 1 s of
3732 * futile waiting, but inform the user about this.
3733 */
3734 printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
3735 "state on VCPU %d after 1 s timeout\n",
3736 __func__, vcpu->vcpu_id);
3737 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003738 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003739 }
3740
Avi Kivity6aa8b732006-12-10 02:21:36 -08003741 if (exit_reason < kvm_vmx_max_exit_handlers
3742 && kvm_vmx_exit_handlers[exit_reason])
Avi Kivity851ba692009-08-24 11:10:17 +03003743 return kvm_vmx_exit_handlers[exit_reason](vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003744 else {
Avi Kivity851ba692009-08-24 11:10:17 +03003745 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3746 vcpu->run->hw.hardware_exit_reason = exit_reason;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003747 }
3748 return 0;
3749}
3750
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003751static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003752{
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003753 if (irr == -1 || tpr < irr) {
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003754 vmcs_write32(TPR_THRESHOLD, 0);
3755 return;
3756 }
3757
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003758 vmcs_write32(TPR_THRESHOLD, irr);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003759}
3760
Avi Kivity51aa01d2010-07-20 14:31:20 +03003761static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
Avi Kivitycf393f72008-07-01 16:20:21 +03003762{
Avi Kivity51aa01d2010-07-20 14:31:20 +03003763 u32 exit_intr_info = vmx->exit_intr_info;
Andi Kleena0861c02009-06-08 17:37:09 +08003764
3765 /* Handle machine checks before interrupts are enabled */
3766 if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY)
3767 || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI
3768 && is_machine_check(exit_intr_info)))
3769 kvm_machine_check();
3770
Gleb Natapov20f65982009-05-11 13:35:55 +03003771 /* We need to handle NMIs before interrupts are enabled */
3772 if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003773 (exit_intr_info & INTR_INFO_VALID_MASK)) {
3774 kvm_before_handle_nmi(&vmx->vcpu);
Gleb Natapov20f65982009-05-11 13:35:55 +03003775 asm("int $2");
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003776 kvm_after_handle_nmi(&vmx->vcpu);
3777 }
Avi Kivity51aa01d2010-07-20 14:31:20 +03003778}
Gleb Natapov20f65982009-05-11 13:35:55 +03003779
Avi Kivity51aa01d2010-07-20 14:31:20 +03003780static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx)
3781{
3782 u32 exit_intr_info = vmx->exit_intr_info;
3783 bool unblock_nmi;
3784 u8 vector;
3785 bool idtv_info_valid;
3786
3787 idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Gleb Natapov20f65982009-05-11 13:35:55 +03003788
Avi Kivitycf393f72008-07-01 16:20:21 +03003789 if (cpu_has_virtual_nmis()) {
3790 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
3791 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
3792 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003793 * SDM 3: 27.7.1.2 (September 2008)
Avi Kivitycf393f72008-07-01 16:20:21 +03003794 * Re-set bit "block by NMI" before VM entry if vmexit caused by
3795 * a guest IRET fault.
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003796 * SDM 3: 23.2.2 (September 2008)
3797 * Bit 12 is undefined in any of the following cases:
3798 * If the VM exit sets the valid bit in the IDT-vectoring
3799 * information field.
3800 * If the VM exit is due to a double fault.
Avi Kivitycf393f72008-07-01 16:20:21 +03003801 */
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003802 if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi &&
3803 vector != DF_VECTOR && !idtv_info_valid)
Avi Kivitycf393f72008-07-01 16:20:21 +03003804 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3805 GUEST_INTR_STATE_NMI);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003806 } else if (unlikely(vmx->soft_vnmi_blocked))
3807 vmx->vnmi_blocked_time +=
3808 ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
Avi Kivity51aa01d2010-07-20 14:31:20 +03003809}
3810
Avi Kivity83422e12010-07-20 14:43:23 +03003811static void __vmx_complete_interrupts(struct vcpu_vmx *vmx,
3812 u32 idt_vectoring_info,
3813 int instr_len_field,
3814 int error_code_field)
Avi Kivity51aa01d2010-07-20 14:31:20 +03003815{
Avi Kivity51aa01d2010-07-20 14:31:20 +03003816 u8 vector;
3817 int type;
3818 bool idtv_info_valid;
3819
3820 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
Avi Kivity668f6122008-07-02 09:28:55 +03003821
Gleb Natapov37b96e92009-03-30 16:03:13 +03003822 vmx->vcpu.arch.nmi_injected = false;
3823 kvm_clear_exception_queue(&vmx->vcpu);
3824 kvm_clear_interrupt_queue(&vmx->vcpu);
3825
3826 if (!idtv_info_valid)
3827 return;
3828
Avi Kivity3842d132010-07-27 12:30:24 +03003829 kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu);
3830
Avi Kivity668f6122008-07-02 09:28:55 +03003831 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
3832 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003833
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003834 switch (type) {
Gleb Natapov37b96e92009-03-30 16:03:13 +03003835 case INTR_TYPE_NMI_INTR:
3836 vmx->vcpu.arch.nmi_injected = true;
Avi Kivity668f6122008-07-02 09:28:55 +03003837 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003838 * SDM 3: 27.7.1.2 (September 2008)
Gleb Natapov37b96e92009-03-30 16:03:13 +03003839 * Clear bit "block by NMI" before VM entry if a NMI
3840 * delivery faulted.
Avi Kivity668f6122008-07-02 09:28:55 +03003841 */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003842 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
3843 GUEST_INTR_STATE_NMI);
3844 break;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003845 case INTR_TYPE_SOFT_EXCEPTION:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003846 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03003847 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003848 /* fall through */
3849 case INTR_TYPE_HARD_EXCEPTION:
Avi Kivity35920a32008-07-03 14:50:12 +03003850 if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
Avi Kivity83422e12010-07-20 14:43:23 +03003851 u32 err = vmcs_read32(error_code_field);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003852 kvm_queue_exception_e(&vmx->vcpu, vector, err);
Avi Kivity35920a32008-07-03 14:50:12 +03003853 } else
3854 kvm_queue_exception(&vmx->vcpu, vector);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003855 break;
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003856 case INTR_TYPE_SOFT_INTR:
3857 vmx->vcpu.arch.event_exit_inst_len =
Avi Kivity83422e12010-07-20 14:43:23 +03003858 vmcs_read32(instr_len_field);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003859 /* fall through */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003860 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003861 kvm_queue_interrupt(&vmx->vcpu, vector,
3862 type == INTR_TYPE_SOFT_INTR);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003863 break;
3864 default:
3865 break;
Avi Kivityf7d92382008-07-03 16:14:28 +03003866 }
Avi Kivitycf393f72008-07-01 16:20:21 +03003867}
3868
Avi Kivity83422e12010-07-20 14:43:23 +03003869static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
3870{
3871 __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info,
3872 VM_EXIT_INSTRUCTION_LEN,
3873 IDT_VECTORING_ERROR_CODE);
3874}
3875
Avi Kivityb463a6f2010-07-20 15:06:17 +03003876static void vmx_cancel_injection(struct kvm_vcpu *vcpu)
3877{
3878 __vmx_complete_interrupts(to_vmx(vcpu),
3879 vmcs_read32(VM_ENTRY_INTR_INFO_FIELD),
3880 VM_ENTRY_INSTRUCTION_LEN,
3881 VM_ENTRY_EXCEPTION_ERROR_CODE);
3882
3883 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
3884}
3885
Avi Kivityc8019492008-07-14 14:44:59 +03003886#ifdef CONFIG_X86_64
3887#define R "r"
3888#define Q "q"
3889#else
3890#define R "e"
3891#define Q "l"
3892#endif
3893
Avi Kivity851ba692009-08-24 11:10:17 +03003894static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003895{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003896 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivitye6adf282007-04-30 16:07:54 +03003897
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003898 /* Record the guest's net vcpu time for enforced NMI injections. */
3899 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
3900 vmx->entry_time = ktime_get();
3901
Mohammed Gamal80ced182009-09-01 12:48:18 +02003902 /* Don't enter VMX if guest state is invalid, let the exit handler
3903 start emulation until we arrive back to a valid state */
3904 if (vmx->emulation_required && emulate_invalid_guest_state)
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03003905 return;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03003906
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003907 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
3908 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
3909 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
3910 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
3911
Gleb Natapov787ff732009-05-18 11:44:06 +03003912 /* When single-stepping over STI and MOV SS, we must clear the
3913 * corresponding interruptibility bits in the guest state. Otherwise
3914 * vmentry fails as it then expects bit 14 (BS) in pending debug
3915 * exceptions being set, but that's not correct for the guest debugging
3916 * case. */
3917 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
3918 vmx_set_interrupt_shadow(vcpu, 0);
3919
Mike Dayd77c26f2007-10-08 09:02:08 -04003920 asm(
Avi Kivity6aa8b732006-12-10 02:21:36 -08003921 /* Store host registers */
Avi Kivityc8019492008-07-14 14:44:59 +03003922 "push %%"R"dx; push %%"R"bp;"
3923 "push %%"R"cx \n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03003924 "cmp %%"R"sp, %c[host_rsp](%0) \n\t"
3925 "je 1f \n\t"
3926 "mov %%"R"sp, %c[host_rsp](%0) \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003927 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03003928 "1: \n\t"
Avi Kivityd3edefc2009-06-16 12:33:56 +03003929 /* Reload cr2 if changed */
3930 "mov %c[cr2](%0), %%"R"ax \n\t"
3931 "mov %%cr2, %%"R"dx \n\t"
3932 "cmp %%"R"ax, %%"R"dx \n\t"
3933 "je 2f \n\t"
3934 "mov %%"R"ax, %%cr2 \n\t"
3935 "2: \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003936 /* Check if vmlaunch of vmresume is needed */
Avi Kivitye08aa782007-11-15 18:06:18 +02003937 "cmpl $0, %c[launched](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003938 /* Load guest registers. Don't clobber flags. */
Avi Kivityc8019492008-07-14 14:44:59 +03003939 "mov %c[rax](%0), %%"R"ax \n\t"
3940 "mov %c[rbx](%0), %%"R"bx \n\t"
3941 "mov %c[rdx](%0), %%"R"dx \n\t"
3942 "mov %c[rsi](%0), %%"R"si \n\t"
3943 "mov %c[rdi](%0), %%"R"di \n\t"
3944 "mov %c[rbp](%0), %%"R"bp \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003945#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02003946 "mov %c[r8](%0), %%r8 \n\t"
3947 "mov %c[r9](%0), %%r9 \n\t"
3948 "mov %c[r10](%0), %%r10 \n\t"
3949 "mov %c[r11](%0), %%r11 \n\t"
3950 "mov %c[r12](%0), %%r12 \n\t"
3951 "mov %c[r13](%0), %%r13 \n\t"
3952 "mov %c[r14](%0), %%r14 \n\t"
3953 "mov %c[r15](%0), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003954#endif
Avi Kivityc8019492008-07-14 14:44:59 +03003955 "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
3956
Avi Kivity6aa8b732006-12-10 02:21:36 -08003957 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03003958 "jne .Llaunched \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003959 __ex(ASM_VMX_VMLAUNCH) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03003960 "jmp .Lkvm_vmx_return \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003961 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03003962 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08003963 /* Save guest registers, load host registers, keep flags */
Avi Kivityc8019492008-07-14 14:44:59 +03003964 "xchg %0, (%%"R"sp) \n\t"
3965 "mov %%"R"ax, %c[rax](%0) \n\t"
3966 "mov %%"R"bx, %c[rbx](%0) \n\t"
3967 "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
3968 "mov %%"R"dx, %c[rdx](%0) \n\t"
3969 "mov %%"R"si, %c[rsi](%0) \n\t"
3970 "mov %%"R"di, %c[rdi](%0) \n\t"
3971 "mov %%"R"bp, %c[rbp](%0) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003972#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02003973 "mov %%r8, %c[r8](%0) \n\t"
3974 "mov %%r9, %c[r9](%0) \n\t"
3975 "mov %%r10, %c[r10](%0) \n\t"
3976 "mov %%r11, %c[r11](%0) \n\t"
3977 "mov %%r12, %c[r12](%0) \n\t"
3978 "mov %%r13, %c[r13](%0) \n\t"
3979 "mov %%r14, %c[r14](%0) \n\t"
3980 "mov %%r15, %c[r15](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003981#endif
Avi Kivityc8019492008-07-14 14:44:59 +03003982 "mov %%cr2, %%"R"ax \n\t"
3983 "mov %%"R"ax, %c[cr2](%0) \n\t"
3984
3985 "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02003986 "setbe %c[fail](%0) \n\t"
3987 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
3988 [launched]"i"(offsetof(struct vcpu_vmx, launched)),
3989 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
Avi Kivity313dbd42008-07-17 18:04:30 +03003990 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003991 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
3992 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
3993 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
3994 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
3995 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
3996 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
3997 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003998#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003999 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
4000 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
4001 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
4002 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
4003 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
4004 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
4005 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
4006 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
Avi Kivity6aa8b732006-12-10 02:21:36 -08004007#endif
Zhang Xiantaoad312c72007-12-13 23:50:52 +08004008 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
Laurent Vivierc2036302007-10-25 14:18:52 +02004009 : "cc", "memory"
Jan Kiszka07d6f552010-09-28 16:37:42 +02004010 , R"ax", R"bx", R"di", R"si"
Laurent Vivierc2036302007-10-25 14:18:52 +02004011#ifdef CONFIG_X86_64
Laurent Vivierc2036302007-10-25 14:18:52 +02004012 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
4013#endif
4014 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08004015
Avi Kivity6de4f3a2009-05-31 22:58:47 +03004016 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
4017 | (1 << VCPU_EXREG_PDPTR));
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004018 vcpu->arch.regs_dirty = 0;
4019
Avi Kivity1155f762007-11-22 11:30:47 +02004020 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
4021
Mike Dayd77c26f2007-10-08 09:02:08 -04004022 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Avi Kivity15ad7142007-07-11 18:17:21 +03004023 vmx->launched = 1;
Avi Kivity1b6269d2007-10-09 12:12:19 +02004024
Avi Kivity51aa01d2010-07-20 14:31:20 +03004025 vmx->exit_reason = vmcs_read32(VM_EXIT_REASON);
4026 vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
4027
4028 vmx_complete_atomic_exit(vmx);
4029 vmx_recover_nmi_blocking(vmx);
Avi Kivitycf393f72008-07-01 16:20:21 +03004030 vmx_complete_interrupts(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004031}
4032
Avi Kivityc8019492008-07-14 14:44:59 +03004033#undef R
4034#undef Q
4035
Avi Kivity6aa8b732006-12-10 02:21:36 -08004036static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
4037{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004038 struct vcpu_vmx *vmx = to_vmx(vcpu);
4039
4040 if (vmx->vmcs) {
Avi Kivity543e4242008-05-13 16:22:47 +03004041 vcpu_clear(vmx);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004042 free_vmcs(vmx->vmcs);
4043 vmx->vmcs = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004044 }
4045}
4046
4047static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
4048{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004049 struct vcpu_vmx *vmx = to_vmx(vcpu);
4050
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08004051 free_vpid(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004052 vmx_free_vmcs(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004053 kfree(vmx->guest_msrs);
4054 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10004055 kmem_cache_free(kvm_vcpu_cache, vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004056}
4057
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08004058static inline void vmcs_init(struct vmcs *vmcs)
4059{
4060 u64 phys_addr = __pa(per_cpu(vmxarea, raw_smp_processor_id()));
4061
4062 if (!vmm_exclusive)
4063 kvm_cpu_vmxon(phys_addr);
4064
4065 vmcs_clear(vmcs);
4066
4067 if (!vmm_exclusive)
4068 kvm_cpu_vmxoff();
4069}
4070
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004071static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08004072{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004073 int err;
Rusty Russellc16f8622007-07-30 21:12:19 +10004074 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Avi Kivity15ad7142007-07-11 18:17:21 +03004075 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004076
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004077 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004078 return ERR_PTR(-ENOMEM);
4079
Sheng Yang2384d2b2008-01-17 15:14:33 +08004080 allocate_vpid(vmx);
4081
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004082 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
4083 if (err)
4084 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004085
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004086 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004087 if (!vmx->guest_msrs) {
4088 err = -ENOMEM;
4089 goto uninit_vcpu;
4090 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08004091
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004092 vmx->vmcs = alloc_vmcs();
4093 if (!vmx->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004094 goto free_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004095
Dongxiao Xu4610c9c2010-05-11 18:29:48 +08004096 vmcs_init(vmx->vmcs);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004097
Avi Kivity15ad7142007-07-11 18:17:21 +03004098 cpu = get_cpu();
4099 vmx_vcpu_load(&vmx->vcpu, cpu);
Zachary Amsdene48672f2010-08-19 22:07:23 -10004100 vmx->vcpu.cpu = cpu;
Rusty Russell8b9cf982007-07-30 16:31:43 +10004101 err = vmx_vcpu_setup(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004102 vmx_vcpu_put(&vmx->vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03004103 put_cpu();
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004104 if (err)
4105 goto free_vmcs;
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02004106 if (vm_need_virtualize_apic_accesses(kvm))
4107 if (alloc_apic_access_page(kvm) != 0)
4108 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004109
Sheng Yangb927a3c2009-07-21 10:42:48 +08004110 if (enable_ept) {
4111 if (!kvm->arch.ept_identity_map_addr)
4112 kvm->arch.ept_identity_map_addr =
4113 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08004114 if (alloc_identity_pagetable(kvm) != 0)
4115 goto free_vmcs;
Sheng Yangb927a3c2009-07-21 10:42:48 +08004116 }
Sheng Yangb7ebfb02008-04-25 21:44:52 +08004117
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004118 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08004119
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004120free_vmcs:
4121 free_vmcs(vmx->vmcs);
4122free_msrs:
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004123 kfree(vmx->guest_msrs);
4124uninit_vcpu:
4125 kvm_vcpu_uninit(&vmx->vcpu);
4126free_vcpu:
Lai Jiangshancdbecfc2010-04-17 16:41:47 +08004127 free_vpid(vmx);
Rusty Russella4770342007-08-01 14:46:11 +10004128 kmem_cache_free(kvm_vcpu_cache, vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10004129 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004130}
4131
Yang, Sheng002c7f72007-07-31 14:23:01 +03004132static void __init vmx_check_processor_compat(void *rtn)
4133{
4134 struct vmcs_config vmcs_conf;
4135
4136 *(int *)rtn = 0;
4137 if (setup_vmcs_config(&vmcs_conf) < 0)
4138 *(int *)rtn = -EIO;
4139 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
4140 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
4141 smp_processor_id());
4142 *(int *)rtn = -EIO;
4143 }
4144}
4145
Sheng Yang67253af2008-04-25 10:20:22 +08004146static int get_ept_level(void)
4147{
4148 return VMX_EPT_DEFAULT_GAW + 1;
4149}
4150
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004151static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08004152{
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004153 u64 ret;
4154
Sheng Yang522c68c2009-04-27 20:35:43 +08004155 /* For VT-d and EPT combination
4156 * 1. MMIO: always map as UC
4157 * 2. EPT with VT-d:
4158 * a. VT-d without snooping control feature: can't guarantee the
4159 * result, try to trust guest.
4160 * b. VT-d with snooping control feature: snooping control feature of
4161 * VT-d engine can guarantee the cache correctness. Just set it
4162 * to WB to keep consistent with host. So the same as item 3.
Sheng Yanga19a6d12010-02-09 16:41:53 +08004163 * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep
Sheng Yang522c68c2009-04-27 20:35:43 +08004164 * consistent with host MTRR
4165 */
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004166 if (is_mmio)
4167 ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang522c68c2009-04-27 20:35:43 +08004168 else if (vcpu->kvm->arch.iommu_domain &&
4169 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
4170 ret = kvm_get_guest_memory_type(vcpu, gfn) <<
4171 VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004172 else
Sheng Yang522c68c2009-04-27 20:35:43 +08004173 ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
Sheng Yanga19a6d12010-02-09 16:41:53 +08004174 | VMX_EPT_IPAT_BIT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004175
4176 return ret;
Sheng Yang64d4d522008-10-09 16:01:57 +08004177}
4178
Avi Kivityf4c9e872009-12-28 16:06:35 +02004179#define _ER(x) { EXIT_REASON_##x, #x }
4180
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004181static const struct trace_print_flags vmx_exit_reasons_str[] = {
Avi Kivityf4c9e872009-12-28 16:06:35 +02004182 _ER(EXCEPTION_NMI),
4183 _ER(EXTERNAL_INTERRUPT),
4184 _ER(TRIPLE_FAULT),
4185 _ER(PENDING_INTERRUPT),
4186 _ER(NMI_WINDOW),
4187 _ER(TASK_SWITCH),
4188 _ER(CPUID),
4189 _ER(HLT),
4190 _ER(INVLPG),
4191 _ER(RDPMC),
4192 _ER(RDTSC),
4193 _ER(VMCALL),
4194 _ER(VMCLEAR),
4195 _ER(VMLAUNCH),
4196 _ER(VMPTRLD),
4197 _ER(VMPTRST),
4198 _ER(VMREAD),
4199 _ER(VMRESUME),
4200 _ER(VMWRITE),
4201 _ER(VMOFF),
4202 _ER(VMON),
4203 _ER(CR_ACCESS),
4204 _ER(DR_ACCESS),
4205 _ER(IO_INSTRUCTION),
4206 _ER(MSR_READ),
4207 _ER(MSR_WRITE),
4208 _ER(MWAIT_INSTRUCTION),
4209 _ER(MONITOR_INSTRUCTION),
4210 _ER(PAUSE_INSTRUCTION),
4211 _ER(MCE_DURING_VMENTRY),
4212 _ER(TPR_BELOW_THRESHOLD),
4213 _ER(APIC_ACCESS),
4214 _ER(EPT_VIOLATION),
4215 _ER(EPT_MISCONFIG),
4216 _ER(WBINVD),
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004217 { -1, NULL }
4218};
4219
Avi Kivityf4c9e872009-12-28 16:06:35 +02004220#undef _ER
4221
Sheng Yang17cc3932010-01-05 19:02:27 +08004222static int vmx_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02004223{
Sheng Yang878403b2010-01-05 19:02:29 +08004224 if (enable_ept && !cpu_has_vmx_ept_1g_page())
4225 return PT_DIRECTORY_LEVEL;
4226 else
4227 /* For shadow and EPT supported 1GB page */
4228 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02004229}
4230
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004231static inline u32 bit(int bitno)
4232{
4233 return 1 << (bitno & 31);
4234}
4235
Sheng Yang0e851882009-12-18 16:48:46 +08004236static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
4237{
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004238 struct kvm_cpuid_entry2 *best;
4239 struct vcpu_vmx *vmx = to_vmx(vcpu);
4240 u32 exec_control;
4241
4242 vmx->rdtscp_enabled = false;
4243 if (vmx_rdtscp_supported()) {
4244 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
4245 if (exec_control & SECONDARY_EXEC_RDTSCP) {
4246 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
4247 if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
4248 vmx->rdtscp_enabled = true;
4249 else {
4250 exec_control &= ~SECONDARY_EXEC_RDTSCP;
4251 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
4252 exec_control);
4253 }
4254 }
4255 }
Sheng Yang0e851882009-12-18 16:48:46 +08004256}
4257
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004258static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
4259{
4260}
4261
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03004262static struct kvm_x86_ops vmx_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004263 .cpu_has_kvm_support = cpu_has_kvm_support,
4264 .disabled_by_bios = vmx_disabled_by_bios,
4265 .hardware_setup = hardware_setup,
4266 .hardware_unsetup = hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03004267 .check_processor_compatibility = vmx_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004268 .hardware_enable = hardware_enable,
4269 .hardware_disable = hardware_disable,
Sheng Yang04547152009-04-01 15:52:31 +08004270 .cpu_has_accelerated_tpr = report_flexpriority,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004271
4272 .vcpu_create = vmx_create_vcpu,
4273 .vcpu_free = vmx_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004274 .vcpu_reset = vmx_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004275
Avi Kivity04d2cc72007-09-10 18:10:54 +03004276 .prepare_guest_switch = vmx_save_host_state,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004277 .vcpu_load = vmx_vcpu_load,
4278 .vcpu_put = vmx_vcpu_put,
4279
4280 .set_guest_debug = set_guest_debug,
4281 .get_msr = vmx_get_msr,
4282 .set_msr = vmx_set_msr,
4283 .get_segment_base = vmx_get_segment_base,
4284 .get_segment = vmx_get_segment,
4285 .set_segment = vmx_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02004286 .get_cpl = vmx_get_cpl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004287 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02004288 .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
Anthony Liguori25c4c272007-04-27 09:29:21 +03004289 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004290 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004291 .set_cr3 = vmx_set_cr3,
4292 .set_cr4 = vmx_set_cr4,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004293 .set_efer = vmx_set_efer,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004294 .get_idt = vmx_get_idt,
4295 .set_idt = vmx_set_idt,
4296 .get_gdt = vmx_get_gdt,
4297 .set_gdt = vmx_set_gdt,
Gleb Natapov020df072010-04-13 10:05:23 +03004298 .set_dr7 = vmx_set_dr7,
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004299 .cache_reg = vmx_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004300 .get_rflags = vmx_get_rflags,
4301 .set_rflags = vmx_set_rflags,
Avi Kivityebcbab42010-02-07 11:56:52 +02004302 .fpu_activate = vmx_fpu_activate,
Avi Kivity02daab22009-12-30 12:40:26 +02004303 .fpu_deactivate = vmx_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004304
4305 .tlb_flush = vmx_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004306
Avi Kivity6aa8b732006-12-10 02:21:36 -08004307 .run = vmx_vcpu_run,
Avi Kivity6062d012009-03-23 17:35:17 +02004308 .handle_exit = vmx_handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004309 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04004310 .set_interrupt_shadow = vmx_set_interrupt_shadow,
4311 .get_interrupt_shadow = vmx_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02004312 .patch_hypercall = vmx_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03004313 .set_irq = vmx_inject_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004314 .set_nmi = vmx_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02004315 .queue_exception = vmx_queue_exception,
Avi Kivityb463a6f2010-07-20 15:06:17 +03004316 .cancel_injection = vmx_cancel_injection,
Gleb Natapov78646122009-03-23 12:12:11 +02004317 .interrupt_allowed = vmx_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004318 .nmi_allowed = vmx_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01004319 .get_nmi_mask = vmx_get_nmi_mask,
4320 .set_nmi_mask = vmx_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004321 .enable_nmi_window = enable_nmi_window,
4322 .enable_irq_window = enable_irq_window,
4323 .update_cr8_intercept = update_cr8_intercept,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004324
Izik Eiduscbc94022007-10-25 00:29:55 +02004325 .set_tss_addr = vmx_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08004326 .get_tdp_level = get_ept_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004327 .get_mt_mask = vmx_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004328
4329 .exit_reasons_str = vmx_exit_reasons_str,
Sheng Yang17cc3932010-01-05 19:02:27 +08004330 .get_lpage_level = vmx_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08004331
4332 .cpuid_update = vmx_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004333
4334 .rdtscp_supported = vmx_rdtscp_supported,
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004335
4336 .set_supported_cpuid = vmx_set_supported_cpuid,
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004337
4338 .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004339
4340 .write_tsc_offset = vmx_write_tsc_offset,
Zachary Amsdene48672f2010-08-19 22:07:23 -10004341 .adjust_tsc_offset = vmx_adjust_tsc_offset,
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004342
4343 .set_tdp_cr3 = vmx_set_cr3,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004344};
4345
4346static int __init vmx_init(void)
4347{
Avi Kivity26bb0982009-09-07 11:14:12 +03004348 int r, i;
4349
4350 rdmsrl_safe(MSR_EFER, &host_efer);
4351
4352 for (i = 0; i < NR_VMX_MSR; ++i)
4353 kvm_define_shared_msr(i, vmx_msr_index[i]);
He, Qingfdef3ad2007-04-30 09:45:24 +03004354
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004355 vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004356 if (!vmx_io_bitmap_a)
4357 return -ENOMEM;
4358
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004359 vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004360 if (!vmx_io_bitmap_b) {
4361 r = -ENOMEM;
4362 goto out;
4363 }
4364
Avi Kivity58972972009-02-24 22:26:47 +02004365 vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
4366 if (!vmx_msr_bitmap_legacy) {
Sheng Yang25c5f222008-03-28 13:18:56 +08004367 r = -ENOMEM;
4368 goto out1;
4369 }
4370
Avi Kivity58972972009-02-24 22:26:47 +02004371 vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
4372 if (!vmx_msr_bitmap_longmode) {
4373 r = -ENOMEM;
4374 goto out2;
4375 }
4376
He, Qingfdef3ad2007-04-30 09:45:24 +03004377 /*
4378 * Allow direct access to the PC debug port (it is often used for I/O
4379 * delays, but the vmexits simply slow things down).
4380 */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004381 memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
4382 clear_bit(0x80, vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004383
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004384 memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004385
Avi Kivity58972972009-02-24 22:26:47 +02004386 memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
4387 memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
Sheng Yang25c5f222008-03-28 13:18:56 +08004388
Sheng Yang2384d2b2008-01-17 15:14:33 +08004389 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
4390
Avi Kivity0ee75be2010-04-28 15:39:01 +03004391 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
4392 __alignof__(struct vcpu_vmx), THIS_MODULE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004393 if (r)
Avi Kivity58972972009-02-24 22:26:47 +02004394 goto out3;
Sheng Yang25c5f222008-03-28 13:18:56 +08004395
Avi Kivity58972972009-02-24 22:26:47 +02004396 vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
4397 vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
4398 vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
4399 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
4400 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
4401 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
He, Qingfdef3ad2007-04-30 09:45:24 +03004402
Avi Kivity089d0342009-03-23 18:26:32 +02004403 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08004404 bypass_guest_pf = 0;
Sheng Yang5fdbcb92008-07-16 09:25:40 +08004405 kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
Sheng Yang2aaf69d2009-01-21 16:52:16 +08004406 VMX_EPT_WRITABLE_MASK);
Sheng Yang534e38b2008-09-08 15:12:30 +08004407 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004408 VMX_EPT_EXECUTABLE_MASK);
Sheng Yang5fdbcb92008-07-16 09:25:40 +08004409 kvm_enable_tdp();
4410 } else
4411 kvm_disable_tdp();
Sheng Yang14394422008-04-28 12:24:45 +08004412
Avi Kivityc7addb92007-09-16 18:58:32 +02004413 if (bypass_guest_pf)
4414 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
4415
He, Qingfdef3ad2007-04-30 09:45:24 +03004416 return 0;
4417
Avi Kivity58972972009-02-24 22:26:47 +02004418out3:
4419 free_page((unsigned long)vmx_msr_bitmap_longmode);
Sheng Yang25c5f222008-03-28 13:18:56 +08004420out2:
Avi Kivity58972972009-02-24 22:26:47 +02004421 free_page((unsigned long)vmx_msr_bitmap_legacy);
He, Qingfdef3ad2007-04-30 09:45:24 +03004422out1:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004423 free_page((unsigned long)vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03004424out:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004425 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004426 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004427}
4428
4429static void __exit vmx_exit(void)
4430{
Avi Kivity58972972009-02-24 22:26:47 +02004431 free_page((unsigned long)vmx_msr_bitmap_legacy);
4432 free_page((unsigned long)vmx_msr_bitmap_longmode);
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004433 free_page((unsigned long)vmx_io_bitmap_b);
4434 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004435
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004436 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08004437}
4438
4439module_init(vmx_init)
4440module_exit(vmx_exit)