blob: d0a10b5612e90ab3c97280385d4c791cb3464d7b [file] [log] [blame]
Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 *
9 * Authors:
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
12 *
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
15 *
16 */
17
Eddie Dong85f455f2007-07-06 12:20:49 +030018#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080019#include "mmu.h"
Avi Kivitye4956062007-06-28 14:15:57 -040020
Avi Kivityedf88412007-12-16 11:02:48 +020021#include <linux/kvm_host.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080022#include <linux/module.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020023#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080024#include <linux/mm.h>
25#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040026#include <linux/sched.h>
Avi Kivityc7addb92007-09-16 18:58:32 +020027#include <linux/moduleparam.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030028#include <linux/ftrace_event.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030030#include "kvm_cache_regs.h"
Avi Kivity35920a32008-07-03 14:50:12 +030031#include "x86.h"
Avi Kivitye4956062007-06-28 14:15:57 -040032
Avi Kivity6aa8b732006-12-10 02:21:36 -080033#include <asm/io.h>
Anthony Liguori3b3be0d2006-12-13 00:33:43 -080034#include <asm/desc.h>
Eduardo Habkost13673a92008-11-17 19:03:13 -020035#include <asm/vmx.h>
Eduardo Habkost6210e372008-11-17 19:03:16 -020036#include <asm/virtext.h>
Andi Kleena0861c02009-06-08 17:37:09 +080037#include <asm/mce.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080038
Marcelo Tosatti229456f2009-06-17 09:22:14 -030039#include "trace.h"
40
Avi Kivity4ecac3f2008-05-13 13:23:38 +030041#define __ex(x) __kvm_handle_fault_on_reboot(x)
42
Avi Kivity6aa8b732006-12-10 02:21:36 -080043MODULE_AUTHOR("Qumranet");
44MODULE_LICENSE("GPL");
45
Avi Kivity4462d212009-03-23 17:53:37 +020046static int __read_mostly bypass_guest_pf = 1;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020047module_param(bypass_guest_pf, bool, S_IRUGO);
Avi Kivityc7addb92007-09-16 18:58:32 +020048
Avi Kivity4462d212009-03-23 17:53:37 +020049static int __read_mostly enable_vpid = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020050module_param_named(vpid, enable_vpid, bool, 0444);
Sheng Yang2384d2b2008-01-17 15:14:33 +080051
Avi Kivity4462d212009-03-23 17:53:37 +020052static int __read_mostly flexpriority_enabled = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020053module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO);
Avi Kivity4c9fc8e2008-03-24 18:15:14 +020054
Avi Kivity4462d212009-03-23 17:53:37 +020055static int __read_mostly enable_ept = 1;
Avi Kivity736caef2009-03-23 17:39:48 +020056module_param_named(ept, enable_ept, bool, S_IRUGO);
Sheng Yangd56f5462008-04-25 10:13:16 +080057
Nitin A Kamble3a624e22009-06-08 11:34:16 -070058static int __read_mostly enable_unrestricted_guest = 1;
59module_param_named(unrestricted_guest,
60 enable_unrestricted_guest, bool, S_IRUGO);
61
Avi Kivity4462d212009-03-23 17:53:37 +020062static int __read_mostly emulate_invalid_guest_state = 0;
Avi Kivityc1f8bc02009-03-23 15:41:17 +020063module_param(emulate_invalid_guest_state, bool, S_IRUGO);
Mohammed Gamal04fa4d32008-08-17 16:39:48 +030064
Avi Kivitycdc0e242009-12-06 17:21:14 +020065#define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \
66 (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
67#define KVM_GUEST_CR0_MASK \
68 (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
69#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \
Avi Kivity81231c62010-01-24 16:26:40 +020070 (X86_CR0_WP | X86_CR0_NE)
Avi Kivitycdc0e242009-12-06 17:21:14 +020071#define KVM_VM_CR0_ALWAYS_ON \
72 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
Avi Kivity4c386092009-12-07 12:26:18 +020073#define KVM_CR4_GUEST_OWNED_BITS \
74 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
75 | X86_CR4_OSXMMEXCPT)
76
Avi Kivitycdc0e242009-12-06 17:21:14 +020077#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
78#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
79
Avi Kivity78ac8b42010-04-08 18:19:35 +030080#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
81
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +080082/*
83 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
84 * ple_gap: upper bound on the amount of time between two successive
85 * executions of PAUSE in a loop. Also indicate if ple enabled.
86 * According to test, this time is usually small than 41 cycles.
87 * ple_window: upper bound on the amount of time a guest is allowed to execute
88 * in a PAUSE loop. Tests indicate that most spinlocks are held for
89 * less than 2^12 cycles
90 * Time is measured based on a counter that runs at the same rate as the TSC,
91 * refer SDM volume 3b section 21.6.13 & 22.1.3.
92 */
93#define KVM_VMX_DEFAULT_PLE_GAP 41
94#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
95static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
96module_param(ple_gap, int, S_IRUGO);
97
98static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
99module_param(ple_window, int, S_IRUGO);
100
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400101struct vmcs {
102 u32 revision_id;
103 u32 abort;
104 char data[0];
105};
106
Avi Kivity26bb0982009-09-07 11:14:12 +0300107struct shared_msr_entry {
108 unsigned index;
109 u64 data;
Avi Kivityd5696722009-12-02 12:28:47 +0200110 u64 mask;
Avi Kivity26bb0982009-09-07 11:14:12 +0300111};
112
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400113struct vcpu_vmx {
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000114 struct kvm_vcpu vcpu;
Avi Kivity543e4242008-05-13 16:22:47 +0300115 struct list_head local_vcpus_link;
Avi Kivity313dbd42008-07-17 18:04:30 +0300116 unsigned long host_rsp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400117 int launched;
Avi Kivity29bd8a72007-09-10 17:27:03 +0300118 u8 fail;
Avi Kivity1155f762007-11-22 11:30:47 +0200119 u32 idt_vectoring_info;
Avi Kivity26bb0982009-09-07 11:14:12 +0300120 struct shared_msr_entry *guest_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400121 int nmsrs;
122 int save_nmsrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400123#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300124 u64 msr_host_kernel_gs_base;
125 u64 msr_guest_kernel_gs_base;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400126#endif
127 struct vmcs *vmcs;
128 struct {
129 int loaded;
130 u16 fs_sel, gs_sel, ldt_sel;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200131 int gs_ldt_reload_needed;
132 int fs_reload_needed;
Mike Dayd77c26f2007-10-08 09:02:08 -0400133 } host_state;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200134 struct {
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300135 int vm86_active;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300136 ulong save_rflags;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300137 struct kvm_save_segment {
138 u16 selector;
139 unsigned long base;
140 u32 limit;
141 u32 ar;
142 } tr, es, ds, fs, gs;
Avi Kivity9c8cba32007-11-22 11:42:59 +0200143 struct {
144 bool pending;
145 u8 vector;
146 unsigned rip;
147 } irq;
148 } rmode;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800149 int vpid;
Mohammed Gamal04fa4d32008-08-17 16:39:48 +0300150 bool emulation_required;
Jan Kiszka3b86cd92008-09-26 09:30:57 +0200151
152 /* Support for vnmi-less CPUs */
153 int soft_vnmi_blocked;
154 ktime_t entry_time;
155 s64 vnmi_blocked_time;
Andi Kleena0861c02009-06-08 17:37:09 +0800156 u32 exit_reason;
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800157
158 bool rdtscp_enabled;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400159};
160
161static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
162{
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000163 return container_of(vcpu, struct vcpu_vmx, vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400164}
165
Sheng Yangb7ebfb02008-04-25 21:44:52 +0800166static int init_rmode(struct kvm *kvm);
Sheng Yang4e1096d2008-07-06 19:16:51 +0800167static u64 construct_eptp(unsigned long root_hpa);
Avi Kivity75880a02007-06-20 11:20:04 +0300168
Avi Kivity6aa8b732006-12-10 02:21:36 -0800169static DEFINE_PER_CPU(struct vmcs *, vmxarea);
170static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
Avi Kivity543e4242008-05-13 16:22:47 +0300171static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800172
Avi Kivity3e7c73e2009-02-24 21:46:19 +0200173static unsigned long *vmx_io_bitmap_a;
174static unsigned long *vmx_io_bitmap_b;
Avi Kivity58972972009-02-24 22:26:47 +0200175static unsigned long *vmx_msr_bitmap_legacy;
176static unsigned long *vmx_msr_bitmap_longmode;
He, Qingfdef3ad2007-04-30 09:45:24 +0300177
Sheng Yang2384d2b2008-01-17 15:14:33 +0800178static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
179static DEFINE_SPINLOCK(vmx_vpid_lock);
180
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300181static struct vmcs_config {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800182 int size;
183 int order;
184 u32 revision_id;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300185 u32 pin_based_exec_ctrl;
186 u32 cpu_based_exec_ctrl;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800187 u32 cpu_based_2nd_exec_ctrl;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +0300188 u32 vmexit_ctrl;
189 u32 vmentry_ctrl;
190} vmcs_config;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800191
Hannes Ederefff9e52008-11-28 17:02:06 +0100192static struct vmx_capability {
Sheng Yangd56f5462008-04-25 10:13:16 +0800193 u32 ept;
194 u32 vpid;
195} vmx_capability;
196
Avi Kivity6aa8b732006-12-10 02:21:36 -0800197#define VMX_SEGMENT_FIELD(seg) \
198 [VCPU_SREG_##seg] = { \
199 .selector = GUEST_##seg##_SELECTOR, \
200 .base = GUEST_##seg##_BASE, \
201 .limit = GUEST_##seg##_LIMIT, \
202 .ar_bytes = GUEST_##seg##_AR_BYTES, \
203 }
204
205static struct kvm_vmx_segment_field {
206 unsigned selector;
207 unsigned base;
208 unsigned limit;
209 unsigned ar_bytes;
210} kvm_vmx_segment_fields[] = {
211 VMX_SEGMENT_FIELD(CS),
212 VMX_SEGMENT_FIELD(DS),
213 VMX_SEGMENT_FIELD(ES),
214 VMX_SEGMENT_FIELD(FS),
215 VMX_SEGMENT_FIELD(GS),
216 VMX_SEGMENT_FIELD(SS),
217 VMX_SEGMENT_FIELD(TR),
218 VMX_SEGMENT_FIELD(LDTR),
219};
220
Avi Kivity26bb0982009-09-07 11:14:12 +0300221static u64 host_efer;
222
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300223static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
224
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300225/*
226 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
227 * away by decrementing the array size.
228 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800229static const u32 vmx_msr_index[] = {
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800230#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300231 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800232#endif
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800233 MSR_EFER, MSR_TSC_AUX, MSR_K6_STAR,
Avi Kivity6aa8b732006-12-10 02:21:36 -0800234};
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200235#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800236
Gui Jianfeng31299942010-03-15 17:29:09 +0800237static inline bool is_page_fault(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800238{
239 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
240 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100241 (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800242}
243
Gui Jianfeng31299942010-03-15 17:29:09 +0800244static inline bool is_no_device(u32 intr_info)
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300245{
246 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
247 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100248 (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300249}
250
Gui Jianfeng31299942010-03-15 17:29:09 +0800251static inline bool is_invalid_opcode(u32 intr_info)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500252{
253 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
254 INTR_INFO_VALID_MASK)) ==
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100255 (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -0500256}
257
Gui Jianfeng31299942010-03-15 17:29:09 +0800258static inline bool is_external_interrupt(u32 intr_info)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800259{
260 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
261 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
262}
263
Gui Jianfeng31299942010-03-15 17:29:09 +0800264static inline bool is_machine_check(u32 intr_info)
Andi Kleena0861c02009-06-08 17:37:09 +0800265{
266 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
267 INTR_INFO_VALID_MASK)) ==
268 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
269}
270
Gui Jianfeng31299942010-03-15 17:29:09 +0800271static inline bool cpu_has_vmx_msr_bitmap(void)
Sheng Yang25c5f222008-03-28 13:18:56 +0800272{
Sheng Yang04547152009-04-01 15:52:31 +0800273 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS;
Sheng Yang25c5f222008-03-28 13:18:56 +0800274}
275
Gui Jianfeng31299942010-03-15 17:29:09 +0800276static inline bool cpu_has_vmx_tpr_shadow(void)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800277{
Sheng Yang04547152009-04-01 15:52:31 +0800278 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW;
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800279}
280
Gui Jianfeng31299942010-03-15 17:29:09 +0800281static inline bool vm_need_tpr_shadow(struct kvm *kvm)
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800282{
Sheng Yang04547152009-04-01 15:52:31 +0800283 return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm));
Yang, Sheng6e5d8652007-09-12 18:03:11 +0800284}
285
Gui Jianfeng31299942010-03-15 17:29:09 +0800286static inline bool cpu_has_secondary_exec_ctrls(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800287{
Sheng Yang04547152009-04-01 15:52:31 +0800288 return vmcs_config.cpu_based_exec_ctrl &
289 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Sheng Yangf78e0e22007-10-29 09:40:42 +0800290}
291
Avi Kivity774ead32007-12-26 13:57:04 +0200292static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800293{
Sheng Yang04547152009-04-01 15:52:31 +0800294 return vmcs_config.cpu_based_2nd_exec_ctrl &
295 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
296}
297
298static inline bool cpu_has_vmx_flexpriority(void)
299{
300 return cpu_has_vmx_tpr_shadow() &&
301 cpu_has_vmx_virtualize_apic_accesses();
Sheng Yangf78e0e22007-10-29 09:40:42 +0800302}
303
Marcelo Tosattie7997942009-06-11 12:07:40 -0300304static inline bool cpu_has_vmx_ept_execute_only(void)
305{
Gui Jianfeng31299942010-03-15 17:29:09 +0800306 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300307}
308
309static inline bool cpu_has_vmx_eptp_uncacheable(void)
310{
Gui Jianfeng31299942010-03-15 17:29:09 +0800311 return vmx_capability.ept & VMX_EPTP_UC_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300312}
313
314static inline bool cpu_has_vmx_eptp_writeback(void)
315{
Gui Jianfeng31299942010-03-15 17:29:09 +0800316 return vmx_capability.ept & VMX_EPTP_WB_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300317}
318
319static inline bool cpu_has_vmx_ept_2m_page(void)
320{
Gui Jianfeng31299942010-03-15 17:29:09 +0800321 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT;
Marcelo Tosattie7997942009-06-11 12:07:40 -0300322}
323
Sheng Yang878403b2010-01-05 19:02:29 +0800324static inline bool cpu_has_vmx_ept_1g_page(void)
325{
Gui Jianfeng31299942010-03-15 17:29:09 +0800326 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;
Sheng Yang878403b2010-01-05 19:02:29 +0800327}
328
Gui Jianfeng31299942010-03-15 17:29:09 +0800329static inline bool cpu_has_vmx_invept_individual_addr(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800330{
Gui Jianfeng31299942010-03-15 17:29:09 +0800331 return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800332}
333
Gui Jianfeng31299942010-03-15 17:29:09 +0800334static inline bool cpu_has_vmx_invept_context(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800335{
Gui Jianfeng31299942010-03-15 17:29:09 +0800336 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800337}
338
Gui Jianfeng31299942010-03-15 17:29:09 +0800339static inline bool cpu_has_vmx_invept_global(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800340{
Gui Jianfeng31299942010-03-15 17:29:09 +0800341 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800342}
343
Gui Jianfeng31299942010-03-15 17:29:09 +0800344static inline bool cpu_has_vmx_ept(void)
Sheng Yangd56f5462008-04-25 10:13:16 +0800345{
Sheng Yang04547152009-04-01 15:52:31 +0800346 return vmcs_config.cpu_based_2nd_exec_ctrl &
347 SECONDARY_EXEC_ENABLE_EPT;
Sheng Yangd56f5462008-04-25 10:13:16 +0800348}
349
Gui Jianfeng31299942010-03-15 17:29:09 +0800350static inline bool cpu_has_vmx_unrestricted_guest(void)
Nitin A Kamble3a624e22009-06-08 11:34:16 -0700351{
352 return vmcs_config.cpu_based_2nd_exec_ctrl &
353 SECONDARY_EXEC_UNRESTRICTED_GUEST;
354}
355
Gui Jianfeng31299942010-03-15 17:29:09 +0800356static inline bool cpu_has_vmx_ple(void)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +0800357{
358 return vmcs_config.cpu_based_2nd_exec_ctrl &
359 SECONDARY_EXEC_PAUSE_LOOP_EXITING;
360}
361
Gui Jianfeng31299942010-03-15 17:29:09 +0800362static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800363{
Gui Jianfeng6d3e4352010-01-29 15:36:59 +0800364 return flexpriority_enabled && irqchip_in_kernel(kvm);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800365}
366
Gui Jianfeng31299942010-03-15 17:29:09 +0800367static inline bool cpu_has_vmx_vpid(void)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800368{
Sheng Yang04547152009-04-01 15:52:31 +0800369 return vmcs_config.cpu_based_2nd_exec_ctrl &
370 SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang2384d2b2008-01-17 15:14:33 +0800371}
372
Gui Jianfeng31299942010-03-15 17:29:09 +0800373static inline bool cpu_has_vmx_rdtscp(void)
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800374{
375 return vmcs_config.cpu_based_2nd_exec_ctrl &
376 SECONDARY_EXEC_RDTSCP;
377}
378
Gui Jianfeng31299942010-03-15 17:29:09 +0800379static inline bool cpu_has_virtual_nmis(void)
Sheng Yangf08864b2008-05-15 18:23:25 +0800380{
381 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
382}
383
Sheng Yang04547152009-04-01 15:52:31 +0800384static inline bool report_flexpriority(void)
385{
386 return flexpriority_enabled;
387}
388
Rusty Russell8b9cf982007-07-30 16:31:43 +1000389static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
Avi Kivity7725f0b2006-12-13 00:34:01 -0800390{
391 int i;
392
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400393 for (i = 0; i < vmx->nmsrs; ++i)
Avi Kivity26bb0982009-09-07 11:14:12 +0300394 if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300395 return i;
396 return -1;
397}
398
Sheng Yang2384d2b2008-01-17 15:14:33 +0800399static inline void __invvpid(int ext, u16 vpid, gva_t gva)
400{
401 struct {
402 u64 vpid : 16;
403 u64 rsvd : 48;
404 u64 gva;
405 } operand = { vpid, 0, gva };
406
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300407 asm volatile (__ex(ASM_VMX_INVVPID)
Sheng Yang2384d2b2008-01-17 15:14:33 +0800408 /* CF==1 or ZF==1 --> rc = -1 */
409 "; ja 1f ; ud2 ; 1:"
410 : : "a"(&operand), "c"(ext) : "cc", "memory");
411}
412
Sheng Yang14394422008-04-28 12:24:45 +0800413static inline void __invept(int ext, u64 eptp, gpa_t gpa)
414{
415 struct {
416 u64 eptp, gpa;
417 } operand = {eptp, gpa};
418
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300419 asm volatile (__ex(ASM_VMX_INVEPT)
Sheng Yang14394422008-04-28 12:24:45 +0800420 /* CF==1 or ZF==1 --> rc = -1 */
421 "; ja 1f ; ud2 ; 1:\n"
422 : : "a" (&operand), "c" (ext) : "cc", "memory");
423}
424
Avi Kivity26bb0982009-09-07 11:14:12 +0300425static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
Eddie Donga75beee2007-05-17 18:55:15 +0300426{
427 int i;
428
Rusty Russell8b9cf982007-07-30 16:31:43 +1000429 i = __find_msr_index(vmx, msr);
Eddie Donga75beee2007-05-17 18:55:15 +0300430 if (i >= 0)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400431 return &vmx->guest_msrs[i];
Al Viro8b6d44c2007-02-09 16:38:40 +0000432 return NULL;
Avi Kivity7725f0b2006-12-13 00:34:01 -0800433}
434
Avi Kivity6aa8b732006-12-10 02:21:36 -0800435static void vmcs_clear(struct vmcs *vmcs)
436{
437 u64 phys_addr = __pa(vmcs);
438 u8 error;
439
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300440 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
Avi Kivity6aa8b732006-12-10 02:21:36 -0800441 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
442 : "cc", "memory");
443 if (error)
444 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
445 vmcs, phys_addr);
446}
447
448static void __vcpu_clear(void *arg)
449{
Rusty Russell8b9cf982007-07-30 16:31:43 +1000450 struct vcpu_vmx *vmx = arg;
Ingo Molnard3b2c332007-01-05 16:36:23 -0800451 int cpu = raw_smp_processor_id();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800452
Rusty Russell8b9cf982007-07-30 16:31:43 +1000453 if (vmx->vcpu.cpu == cpu)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400454 vmcs_clear(vmx->vmcs);
455 if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800456 per_cpu(current_vmcs, cpu) = NULL;
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800457 rdtscll(vmx->vcpu.arch.host_tsc);
Avi Kivity543e4242008-05-13 16:22:47 +0300458 list_del(&vmx->local_vcpus_link);
459 vmx->vcpu.cpu = -1;
460 vmx->launched = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800461}
462
Rusty Russell8b9cf982007-07-30 16:31:43 +1000463static void vcpu_clear(struct vcpu_vmx *vmx)
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800464{
Avi Kivityeae5ecb2007-09-30 10:50:12 +0200465 if (vmx->vcpu.cpu == -1)
466 return;
Jens Axboe8691e5a2008-06-06 11:18:06 +0200467 smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
Avi Kivity8d0be2b2007-02-12 00:54:46 -0800468}
469
Sheng Yang2384d2b2008-01-17 15:14:33 +0800470static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx)
471{
472 if (vmx->vpid == 0)
473 return;
474
475 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
476}
477
Sheng Yang14394422008-04-28 12:24:45 +0800478static inline void ept_sync_global(void)
479{
480 if (cpu_has_vmx_invept_global())
481 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
482}
483
484static inline void ept_sync_context(u64 eptp)
485{
Avi Kivity089d0342009-03-23 18:26:32 +0200486 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800487 if (cpu_has_vmx_invept_context())
488 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
489 else
490 ept_sync_global();
491 }
492}
493
494static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
495{
Avi Kivity089d0342009-03-23 18:26:32 +0200496 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +0800497 if (cpu_has_vmx_invept_individual_addr())
498 __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
499 eptp, gpa);
500 else
501 ept_sync_context(eptp);
502 }
503}
504
Avi Kivity6aa8b732006-12-10 02:21:36 -0800505static unsigned long vmcs_readl(unsigned long field)
506{
507 unsigned long value;
508
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300509 asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800510 : "=a"(value) : "d"(field) : "cc");
511 return value;
512}
513
514static u16 vmcs_read16(unsigned long field)
515{
516 return vmcs_readl(field);
517}
518
519static u32 vmcs_read32(unsigned long field)
520{
521 return vmcs_readl(field);
522}
523
524static u64 vmcs_read64(unsigned long field)
525{
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800526#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800527 return vmcs_readl(field);
528#else
529 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
530#endif
531}
532
Avi Kivitye52de1b2007-01-05 16:36:56 -0800533static noinline void vmwrite_error(unsigned long field, unsigned long value)
534{
535 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
536 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
537 dump_stack();
538}
539
Avi Kivity6aa8b732006-12-10 02:21:36 -0800540static void vmcs_writel(unsigned long field, unsigned long value)
541{
542 u8 error;
543
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300544 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
Mike Dayd77c26f2007-10-08 09:02:08 -0400545 : "=q"(error) : "a"(value), "d"(field) : "cc");
Avi Kivitye52de1b2007-01-05 16:36:56 -0800546 if (unlikely(error))
547 vmwrite_error(field, value);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800548}
549
550static void vmcs_write16(unsigned long field, u16 value)
551{
552 vmcs_writel(field, value);
553}
554
555static void vmcs_write32(unsigned long field, u32 value)
556{
557 vmcs_writel(field, value);
558}
559
560static void vmcs_write64(unsigned long field, u64 value)
561{
Avi Kivity6aa8b732006-12-10 02:21:36 -0800562 vmcs_writel(field, value);
Avi Kivity7682f2d2008-05-12 19:25:43 +0300563#ifndef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800564 asm volatile ("");
565 vmcs_writel(field+1, value >> 32);
566#endif
567}
568
Anthony Liguori2ab455c2007-04-27 09:29:49 +0300569static void vmcs_clear_bits(unsigned long field, u32 mask)
570{
571 vmcs_writel(field, vmcs_readl(field) & ~mask);
572}
573
574static void vmcs_set_bits(unsigned long field, u32 mask)
575{
576 vmcs_writel(field, vmcs_readl(field) | mask);
577}
578
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300579static void update_exception_bitmap(struct kvm_vcpu *vcpu)
580{
581 u32 eb;
582
Jan Kiszkafd7373c2010-01-20 18:20:20 +0100583 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
584 (1u << NM_VECTOR) | (1u << DB_VECTOR);
585 if ((vcpu->guest_debug &
586 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
587 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
588 eb |= 1u << BP_VECTOR;
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300589 if (to_vmx(vcpu)->rmode.vm86_active)
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300590 eb = ~0;
Avi Kivity089d0342009-03-23 18:26:32 +0200591 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +0800592 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
Avi Kivity02daab22009-12-30 12:40:26 +0200593 if (vcpu->fpu_active)
594 eb &= ~(1u << NM_VECTOR);
Avi Kivityabd3f2d2007-05-02 17:57:40 +0300595 vmcs_write32(EXCEPTION_BITMAP, eb);
596}
597
Avi Kivity33ed6322007-05-02 16:54:03 +0300598static void reload_tss(void)
599{
Avi Kivity33ed6322007-05-02 16:54:03 +0300600 /*
601 * VT restores TR but not its size. Useless.
602 */
Gleb Natapov89a27f42010-02-16 10:51:48 +0200603 struct desc_ptr gdt;
Avi Kivitya5f61302008-02-20 17:57:21 +0200604 struct desc_struct *descs;
Avi Kivity33ed6322007-05-02 16:54:03 +0300605
Gleb Natapovd6ab1ed2010-02-25 12:43:07 +0200606 native_store_gdt(&gdt);
Gleb Natapov89a27f42010-02-16 10:51:48 +0200607 descs = (void *)gdt.address;
Avi Kivity33ed6322007-05-02 16:54:03 +0300608 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
609 load_TR_desc();
Avi Kivity33ed6322007-05-02 16:54:03 +0300610}
611
Avi Kivity92c0d902009-10-29 11:00:16 +0200612static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
Eddie Dong2cc51562007-05-21 07:28:09 +0300613{
Roel Kluin3a34a882009-08-04 02:08:45 -0700614 u64 guest_efer;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300615 u64 ignore_bits;
Eddie Dong2cc51562007-05-21 07:28:09 +0300616
Avi Kivityf6801df2010-01-21 15:31:50 +0200617 guest_efer = vmx->vcpu.arch.efer;
Roel Kluin3a34a882009-08-04 02:08:45 -0700618
Avi Kivity51c6cf62007-08-29 03:48:05 +0300619 /*
620 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
621 * outside long mode
622 */
623 ignore_bits = EFER_NX | EFER_SCE;
624#ifdef CONFIG_X86_64
625 ignore_bits |= EFER_LMA | EFER_LME;
626 /* SCE is meaningful only in long mode on Intel */
627 if (guest_efer & EFER_LMA)
628 ignore_bits &= ~(u64)EFER_SCE;
629#endif
Avi Kivity51c6cf62007-08-29 03:48:05 +0300630 guest_efer &= ~ignore_bits;
631 guest_efer |= host_efer & ignore_bits;
Avi Kivity26bb0982009-09-07 11:14:12 +0300632 vmx->guest_msrs[efer_offset].data = guest_efer;
Avi Kivityd5696722009-12-02 12:28:47 +0200633 vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
Avi Kivity26bb0982009-09-07 11:14:12 +0300634 return true;
Avi Kivity51c6cf62007-08-29 03:48:05 +0300635}
636
Gleb Natapov2d49ec72010-02-25 12:43:09 +0200637static unsigned long segment_base(u16 selector)
638{
639 struct desc_ptr gdt;
640 struct desc_struct *d;
641 unsigned long table_base;
642 unsigned long v;
643
644 if (!(selector & ~3))
645 return 0;
646
647 native_store_gdt(&gdt);
648 table_base = gdt.address;
649
650 if (selector & 4) { /* from ldt */
651 u16 ldt_selector = kvm_read_ldt();
652
653 if (!(ldt_selector & ~3))
654 return 0;
655
656 table_base = segment_base(ldt_selector);
657 }
658 d = (struct desc_struct *)(table_base + (selector & ~7));
659 v = get_desc_base(d);
660#ifdef CONFIG_X86_64
661 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
662 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
663#endif
664 return v;
665}
666
667static inline unsigned long kvm_read_tr_base(void)
668{
669 u16 tr;
670 asm("str %0" : "=g"(tr));
671 return segment_base(tr);
672}
673
Avi Kivity04d2cc72007-09-10 18:10:54 +0300674static void vmx_save_host_state(struct kvm_vcpu *vcpu)
Avi Kivity33ed6322007-05-02 16:54:03 +0300675{
Avi Kivity04d2cc72007-09-10 18:10:54 +0300676 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +0300677 int i;
Avi Kivity04d2cc72007-09-10 18:10:54 +0300678
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400679 if (vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300680 return;
681
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400682 vmx->host_state.loaded = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300683 /*
684 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
685 * allow segment selectors with cpl > 0 or ti == 1.
686 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300687 vmx->host_state.ldt_sel = kvm_read_ldt();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200688 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300689 vmx->host_state.fs_sel = kvm_read_fs();
Laurent Vivier152d3f22007-08-23 16:33:11 +0200690 if (!(vmx->host_state.fs_sel & 7)) {
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400691 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200692 vmx->host_state.fs_reload_needed = 0;
693 } else {
Avi Kivity33ed6322007-05-02 16:54:03 +0300694 vmcs_write16(HOST_FS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200695 vmx->host_state.fs_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300696 }
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300697 vmx->host_state.gs_sel = kvm_read_gs();
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400698 if (!(vmx->host_state.gs_sel & 7))
699 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300700 else {
701 vmcs_write16(HOST_GS_SELECTOR, 0);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200702 vmx->host_state.gs_ldt_reload_needed = 1;
Avi Kivity33ed6322007-05-02 16:54:03 +0300703 }
704
705#ifdef CONFIG_X86_64
706 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
707 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
708#else
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400709 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
710 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
Avi Kivity33ed6322007-05-02 16:54:03 +0300711#endif
Avi Kivity707c0872007-05-02 17:33:43 +0300712
713#ifdef CONFIG_X86_64
Avi Kivity44ea2b12009-09-06 15:55:37 +0300714 if (is_long_mode(&vmx->vcpu)) {
715 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
716 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
717 }
Avi Kivity707c0872007-05-02 17:33:43 +0300718#endif
Avi Kivity26bb0982009-09-07 11:14:12 +0300719 for (i = 0; i < vmx->save_nmsrs; ++i)
720 kvm_set_shared_msr(vmx->guest_msrs[i].index,
Avi Kivityd5696722009-12-02 12:28:47 +0200721 vmx->guest_msrs[i].data,
722 vmx->guest_msrs[i].mask);
Avi Kivity33ed6322007-05-02 16:54:03 +0300723}
724
Avi Kivitya9b21b62008-06-24 11:48:49 +0300725static void __vmx_load_host_state(struct vcpu_vmx *vmx)
Avi Kivity33ed6322007-05-02 16:54:03 +0300726{
Avi Kivity15ad7142007-07-11 18:17:21 +0300727 unsigned long flags;
Avi Kivity33ed6322007-05-02 16:54:03 +0300728
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400729 if (!vmx->host_state.loaded)
Avi Kivity33ed6322007-05-02 16:54:03 +0300730 return;
731
Avi Kivitye1beb1d2007-11-18 13:50:24 +0200732 ++vmx->vcpu.stat.host_state_reload;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400733 vmx->host_state.loaded = 0;
Laurent Vivier152d3f22007-08-23 16:33:11 +0200734 if (vmx->host_state.fs_reload_needed)
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300735 kvm_load_fs(vmx->host_state.fs_sel);
Laurent Vivier152d3f22007-08-23 16:33:11 +0200736 if (vmx->host_state.gs_ldt_reload_needed) {
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300737 kvm_load_ldt(vmx->host_state.ldt_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300738 /*
739 * If we have to reload gs, we must take care to
740 * preserve our gs base.
741 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300742 local_irq_save(flags);
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300743 kvm_load_gs(vmx->host_state.gs_sel);
Avi Kivity33ed6322007-05-02 16:54:03 +0300744#ifdef CONFIG_X86_64
745 wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
746#endif
Avi Kivity15ad7142007-07-11 18:17:21 +0300747 local_irq_restore(flags);
Avi Kivity33ed6322007-05-02 16:54:03 +0300748 }
Laurent Vivier152d3f22007-08-23 16:33:11 +0200749 reload_tss();
Avi Kivity44ea2b12009-09-06 15:55:37 +0300750#ifdef CONFIG_X86_64
751 if (is_long_mode(&vmx->vcpu)) {
752 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
753 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
754 }
755#endif
Avi Kivity33ed6322007-05-02 16:54:03 +0300756}
757
Avi Kivitya9b21b62008-06-24 11:48:49 +0300758static void vmx_load_host_state(struct vcpu_vmx *vmx)
759{
760 preempt_disable();
761 __vmx_load_host_state(vmx);
762 preempt_enable();
763}
764
Avi Kivity6aa8b732006-12-10 02:21:36 -0800765/*
766 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
767 * vcpu mutex is already taken.
768 */
Avi Kivity15ad7142007-07-11 18:17:21 +0300769static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800770{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400771 struct vcpu_vmx *vmx = to_vmx(vcpu);
772 u64 phys_addr = __pa(vmx->vmcs);
Avi Kivity019960a2008-03-04 10:44:51 +0200773 u64 tsc_this, delta, new_offset;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800774
Eddie Donga3d7f852007-09-03 16:15:12 +0300775 if (vcpu->cpu != cpu) {
Rusty Russell8b9cf982007-07-30 16:31:43 +1000776 vcpu_clear(vmx);
Marcelo Tosatti2f599712008-05-27 12:10:20 -0300777 kvm_migrate_timers(vcpu);
Marcelo Tosattieb5109e2009-10-01 19:16:58 -0300778 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
Avi Kivity543e4242008-05-13 16:22:47 +0300779 local_irq_disable();
780 list_add(&vmx->local_vcpus_link,
781 &per_cpu(vcpus_on_cpu, cpu));
782 local_irq_enable();
Eddie Donga3d7f852007-09-03 16:15:12 +0300783 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800784
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400785 if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800786 u8 error;
787
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400788 per_cpu(current_vmcs, cpu) = vmx->vmcs;
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300789 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
Avi Kivity6aa8b732006-12-10 02:21:36 -0800790 : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
791 : "cc");
792 if (error)
793 printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400794 vmx->vmcs, phys_addr);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800795 }
796
797 if (vcpu->cpu != cpu) {
Gleb Natapov89a27f42010-02-16 10:51:48 +0200798 struct desc_ptr dt;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800799 unsigned long sysenter_esp;
800
801 vcpu->cpu = cpu;
802 /*
803 * Linux uses per-cpu TSS and GDT, so set these when switching
804 * processors.
805 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300806 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
Gleb Natapovd6ab1ed2010-02-25 12:43:07 +0200807 native_store_gdt(&dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +0200808 vmcs_writel(HOST_GDTR_BASE, dt.address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800809
810 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
811 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
Avi Kivity77002702007-06-13 19:55:28 +0300812
813 /*
814 * Make sure the time stamp counter is monotonous.
815 */
816 rdtscll(tsc_this);
Avi Kivity019960a2008-03-04 10:44:51 +0200817 if (tsc_this < vcpu->arch.host_tsc) {
818 delta = vcpu->arch.host_tsc - tsc_this;
819 new_offset = vmcs_read64(TSC_OFFSET) + delta;
820 vmcs_write64(TSC_OFFSET, new_offset);
821 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800822 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800823}
824
825static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
826{
Avi Kivitya9b21b62008-06-24 11:48:49 +0300827 __vmx_load_host_state(to_vmx(vcpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800828}
829
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300830static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
831{
Avi Kivity81231c62010-01-24 16:26:40 +0200832 ulong cr0;
833
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300834 if (vcpu->fpu_active)
835 return;
836 vcpu->fpu_active = 1;
Avi Kivity81231c62010-01-24 16:26:40 +0200837 cr0 = vmcs_readl(GUEST_CR0);
838 cr0 &= ~(X86_CR0_TS | X86_CR0_MP);
839 cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP);
840 vmcs_writel(GUEST_CR0, cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300841 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200842 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
843 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300844}
845
Avi Kivityedcafe32009-12-30 18:07:40 +0200846static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
847
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300848static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
849{
Avi Kivityedcafe32009-12-30 18:07:40 +0200850 vmx_decache_cr0_guest_bits(vcpu);
Avi Kivity81231c62010-01-24 16:26:40 +0200851 vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300852 update_exception_bitmap(vcpu);
Avi Kivityedcafe32009-12-30 18:07:40 +0200853 vcpu->arch.cr0_guest_owned_bits = 0;
854 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
855 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
Avi Kivity5fd86fc2007-05-02 20:40:00 +0300856}
857
Avi Kivity6aa8b732006-12-10 02:21:36 -0800858static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
859{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300860 unsigned long rflags, save_rflags;
Avi Kivity345dcaa2009-08-12 15:29:37 +0300861
862 rflags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +0300863 if (to_vmx(vcpu)->rmode.vm86_active) {
864 rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
865 save_rflags = to_vmx(vcpu)->rmode.save_rflags;
866 rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
867 }
Avi Kivity345dcaa2009-08-12 15:29:37 +0300868 return rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800869}
870
871static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
872{
Avi Kivity78ac8b42010-04-08 18:19:35 +0300873 if (to_vmx(vcpu)->rmode.vm86_active) {
874 to_vmx(vcpu)->rmode.save_rflags = rflags;
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +0100875 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity78ac8b42010-04-08 18:19:35 +0300876 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800877 vmcs_writel(GUEST_RFLAGS, rflags);
878}
879
Glauber Costa2809f5d2009-05-12 16:21:05 -0400880static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
881{
882 u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
883 int ret = 0;
884
885 if (interruptibility & GUEST_INTR_STATE_STI)
Jan Kiszka48005f62010-02-19 19:38:07 +0100886 ret |= KVM_X86_SHADOW_INT_STI;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400887 if (interruptibility & GUEST_INTR_STATE_MOV_SS)
Jan Kiszka48005f62010-02-19 19:38:07 +0100888 ret |= KVM_X86_SHADOW_INT_MOV_SS;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400889
890 return ret & mask;
891}
892
893static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
894{
895 u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
896 u32 interruptibility = interruptibility_old;
897
898 interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
899
Jan Kiszka48005f62010-02-19 19:38:07 +0100900 if (mask & KVM_X86_SHADOW_INT_MOV_SS)
Glauber Costa2809f5d2009-05-12 16:21:05 -0400901 interruptibility |= GUEST_INTR_STATE_MOV_SS;
Jan Kiszka48005f62010-02-19 19:38:07 +0100902 else if (mask & KVM_X86_SHADOW_INT_STI)
Glauber Costa2809f5d2009-05-12 16:21:05 -0400903 interruptibility |= GUEST_INTR_STATE_STI;
904
905 if ((interruptibility != interruptibility_old))
906 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
907}
908
Avi Kivity6aa8b732006-12-10 02:21:36 -0800909static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
910{
911 unsigned long rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800912
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300913 rip = kvm_rip_read(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800914 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300915 kvm_rip_write(vcpu, rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800916
Glauber Costa2809f5d2009-05-12 16:21:05 -0400917 /* skipping an emulated instruction also counts */
918 vmx_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800919}
920
Avi Kivity298101d2007-11-25 13:41:11 +0200921static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
922 bool has_error_code, u32 error_code)
923{
Jan Kiszka77ab6db2008-07-14 12:28:51 +0200924 struct vcpu_vmx *vmx = to_vmx(vcpu);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100925 u32 intr_info = nr | INTR_INFO_VALID_MASK;
Jan Kiszka77ab6db2008-07-14 12:28:51 +0200926
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100927 if (has_error_code) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +0200928 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100929 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
930 }
Jan Kiszka77ab6db2008-07-14 12:28:51 +0200931
Avi Kivity7ffd92c2009-06-09 14:10:45 +0300932 if (vmx->rmode.vm86_active) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +0200933 vmx->rmode.irq.pending = true;
934 vmx->rmode.irq.vector = nr;
935 vmx->rmode.irq.rip = kvm_rip_read(vcpu);
Gleb Natapovae0bb3e2009-05-19 11:07:10 +0300936 if (kvm_exception_is_soft(nr))
937 vmx->rmode.irq.rip +=
938 vmx->vcpu.arch.event_exit_inst_len;
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100939 intr_info |= INTR_TYPE_SOFT_INTR;
940 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
Jan Kiszka77ab6db2008-07-14 12:28:51 +0200941 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
942 kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
943 return;
944 }
945
Gleb Natapov66fd3f72009-05-11 13:35:50 +0300946 if (kvm_exception_is_soft(nr)) {
947 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
948 vmx->vcpu.arch.event_exit_inst_len);
Jan Kiszka8ab2d2e2008-12-15 13:52:10 +0100949 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
950 } else
951 intr_info |= INTR_TYPE_HARD_EXCEPTION;
952
953 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
Avi Kivity298101d2007-11-25 13:41:11 +0200954}
955
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800956static bool vmx_rdtscp_supported(void)
957{
958 return cpu_has_vmx_rdtscp();
959}
960
Avi Kivity6aa8b732006-12-10 02:21:36 -0800961/*
Eddie Donga75beee2007-05-17 18:55:15 +0300962 * Swap MSR entry in host/guest MSR entry array.
963 */
Rusty Russell8b9cf982007-07-30 16:31:43 +1000964static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
Eddie Donga75beee2007-05-17 18:55:15 +0300965{
Avi Kivity26bb0982009-09-07 11:14:12 +0300966 struct shared_msr_entry tmp;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400967
968 tmp = vmx->guest_msrs[to];
969 vmx->guest_msrs[to] = vmx->guest_msrs[from];
970 vmx->guest_msrs[from] = tmp;
Eddie Donga75beee2007-05-17 18:55:15 +0300971}
972
973/*
Avi Kivitye38aea32007-04-19 13:22:48 +0300974 * Set up the vmcs to automatically save and restore system
975 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
976 * mode, as fiddling with msrs is very expensive.
977 */
Rusty Russell8b9cf982007-07-30 16:31:43 +1000978static void setup_msrs(struct vcpu_vmx *vmx)
Avi Kivitye38aea32007-04-19 13:22:48 +0300979{
Avi Kivity26bb0982009-09-07 11:14:12 +0300980 int save_nmsrs, index;
Avi Kivity58972972009-02-24 22:26:47 +0200981 unsigned long *msr_bitmap;
Avi Kivitye38aea32007-04-19 13:22:48 +0300982
Avi Kivity33f9c502008-02-27 16:06:57 +0200983 vmx_load_host_state(vmx);
Eddie Donga75beee2007-05-17 18:55:15 +0300984 save_nmsrs = 0;
Avi Kivity4d56c8a2007-04-19 14:28:44 +0300985#ifdef CONFIG_X86_64
Rusty Russell8b9cf982007-07-30 16:31:43 +1000986 if (is_long_mode(&vmx->vcpu)) {
Rusty Russell8b9cf982007-07-30 16:31:43 +1000987 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
Eddie Donga75beee2007-05-17 18:55:15 +0300988 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000989 move_msr_up(vmx, index, save_nmsrs++);
990 index = __find_msr_index(vmx, MSR_LSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +0300991 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000992 move_msr_up(vmx, index, save_nmsrs++);
993 index = __find_msr_index(vmx, MSR_CSTAR);
Eddie Donga75beee2007-05-17 18:55:15 +0300994 if (index >= 0)
Rusty Russell8b9cf982007-07-30 16:31:43 +1000995 move_msr_up(vmx, index, save_nmsrs++);
Sheng Yang4e47c7a2009-12-18 16:48:47 +0800996 index = __find_msr_index(vmx, MSR_TSC_AUX);
997 if (index >= 0 && vmx->rdtscp_enabled)
998 move_msr_up(vmx, index, save_nmsrs++);
Eddie Donga75beee2007-05-17 18:55:15 +0300999 /*
1000 * MSR_K6_STAR is only needed on long mode guests, and only
1001 * if efer.sce is enabled.
1002 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10001003 index = __find_msr_index(vmx, MSR_K6_STAR);
Avi Kivityf6801df2010-01-21 15:31:50 +02001004 if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE))
Rusty Russell8b9cf982007-07-30 16:31:43 +10001005 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001006 }
Eddie Donga75beee2007-05-17 18:55:15 +03001007#endif
Avi Kivity92c0d902009-10-29 11:00:16 +02001008 index = __find_msr_index(vmx, MSR_EFER);
1009 if (index >= 0 && update_transition_efer(vmx, index))
Avi Kivity26bb0982009-09-07 11:14:12 +03001010 move_msr_up(vmx, index, save_nmsrs++);
Avi Kivity4d56c8a2007-04-19 14:28:44 +03001011
Avi Kivity26bb0982009-09-07 11:14:12 +03001012 vmx->save_nmsrs = save_nmsrs;
Avi Kivity58972972009-02-24 22:26:47 +02001013
1014 if (cpu_has_vmx_msr_bitmap()) {
1015 if (is_long_mode(&vmx->vcpu))
1016 msr_bitmap = vmx_msr_bitmap_longmode;
1017 else
1018 msr_bitmap = vmx_msr_bitmap_legacy;
1019
1020 vmcs_write64(MSR_BITMAP, __pa(msr_bitmap));
1021 }
Avi Kivitye38aea32007-04-19 13:22:48 +03001022}
1023
1024/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08001025 * reads and returns guest's timestamp counter "register"
1026 * guest_tsc = host_tsc + tsc_offset -- 21.3
1027 */
1028static u64 guest_read_tsc(void)
1029{
1030 u64 host_tsc, tsc_offset;
1031
1032 rdtscll(host_tsc);
1033 tsc_offset = vmcs_read64(TSC_OFFSET);
1034 return host_tsc + tsc_offset;
1035}
1036
1037/*
1038 * writes 'guest_tsc' into guest's timestamp counter "register"
1039 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
1040 */
Marcelo Tosatti53f658b2008-12-11 20:45:05 +01001041static void guest_write_tsc(u64 guest_tsc, u64 host_tsc)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001042{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001043 vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc);
1044}
1045
Avi Kivity6aa8b732006-12-10 02:21:36 -08001046/*
1047 * Reads an msr value (of 'msr_index') into 'pdata'.
1048 * Returns 0 on success, non-0 otherwise.
1049 * Assumes vcpu_load() was already called.
1050 */
1051static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1052{
1053 u64 data;
Avi Kivity26bb0982009-09-07 11:14:12 +03001054 struct shared_msr_entry *msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001055
1056 if (!pdata) {
1057 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
1058 return -EINVAL;
1059 }
1060
1061 switch (msr_index) {
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001062#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001063 case MSR_FS_BASE:
1064 data = vmcs_readl(GUEST_FS_BASE);
1065 break;
1066 case MSR_GS_BASE:
1067 data = vmcs_readl(GUEST_GS_BASE);
1068 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001069 case MSR_KERNEL_GS_BASE:
1070 vmx_load_host_state(to_vmx(vcpu));
1071 data = to_vmx(vcpu)->msr_guest_kernel_gs_base;
1072 break;
Avi Kivity26bb0982009-09-07 11:14:12 +03001073#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08001074 case MSR_EFER:
Avi Kivity3bab1f52006-12-29 16:49:48 -08001075 return kvm_get_msr_common(vcpu, msr_index, pdata);
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301076 case MSR_IA32_TSC:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001077 data = guest_read_tsc();
1078 break;
1079 case MSR_IA32_SYSENTER_CS:
1080 data = vmcs_read32(GUEST_SYSENTER_CS);
1081 break;
1082 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001083 data = vmcs_readl(GUEST_SYSENTER_EIP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001084 break;
1085 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001086 data = vmcs_readl(GUEST_SYSENTER_ESP);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001087 break;
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001088 case MSR_TSC_AUX:
1089 if (!to_vmx(vcpu)->rdtscp_enabled)
1090 return 1;
1091 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001092 default:
Avi Kivity26bb0982009-09-07 11:14:12 +03001093 vmx_load_host_state(to_vmx(vcpu));
Rusty Russell8b9cf982007-07-30 16:31:43 +10001094 msr = find_msr_entry(to_vmx(vcpu), msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001095 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001096 vmx_load_host_state(to_vmx(vcpu));
Avi Kivity3bab1f52006-12-29 16:49:48 -08001097 data = msr->data;
1098 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001099 }
Avi Kivity3bab1f52006-12-29 16:49:48 -08001100 return kvm_get_msr_common(vcpu, msr_index, pdata);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001101 }
1102
1103 *pdata = data;
1104 return 0;
1105}
1106
1107/*
1108 * Writes msr value into into the appropriate "register".
1109 * Returns 0 on success, non-0 otherwise.
1110 * Assumes vcpu_load() was already called.
1111 */
1112static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1113{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001114 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001115 struct shared_msr_entry *msr;
Marcelo Tosatti53f658b2008-12-11 20:45:05 +01001116 u64 host_tsc;
Eddie Dong2cc51562007-05-21 07:28:09 +03001117 int ret = 0;
1118
Avi Kivity6aa8b732006-12-10 02:21:36 -08001119 switch (msr_index) {
Avi Kivity3bab1f52006-12-29 16:49:48 -08001120 case MSR_EFER:
Avi Kivitya9b21b62008-06-24 11:48:49 +03001121 vmx_load_host_state(vmx);
Eddie Dong2cc51562007-05-21 07:28:09 +03001122 ret = kvm_set_msr_common(vcpu, msr_index, data);
Eddie Dong2cc51562007-05-21 07:28:09 +03001123 break;
Avi Kivity16175a72009-03-23 22:13:44 +02001124#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001125 case MSR_FS_BASE:
1126 vmcs_writel(GUEST_FS_BASE, data);
1127 break;
1128 case MSR_GS_BASE:
1129 vmcs_writel(GUEST_GS_BASE, data);
1130 break;
Avi Kivity44ea2b12009-09-06 15:55:37 +03001131 case MSR_KERNEL_GS_BASE:
1132 vmx_load_host_state(vmx);
1133 vmx->msr_guest_kernel_gs_base = data;
1134 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001135#endif
1136 case MSR_IA32_SYSENTER_CS:
1137 vmcs_write32(GUEST_SYSENTER_CS, data);
1138 break;
1139 case MSR_IA32_SYSENTER_EIP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001140 vmcs_writel(GUEST_SYSENTER_EIP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001141 break;
1142 case MSR_IA32_SYSENTER_ESP:
Avi Kivityf5b42c32007-03-06 12:05:53 +02001143 vmcs_writel(GUEST_SYSENTER_ESP, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001144 break;
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05301145 case MSR_IA32_TSC:
Marcelo Tosatti53f658b2008-12-11 20:45:05 +01001146 rdtscll(host_tsc);
1147 guest_write_tsc(data, host_tsc);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001148 break;
Sheng Yang468d4722008-10-09 16:01:55 +08001149 case MSR_IA32_CR_PAT:
1150 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
1151 vmcs_write64(GUEST_IA32_PAT, data);
1152 vcpu->arch.pat = data;
1153 break;
1154 }
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001155 ret = kvm_set_msr_common(vcpu, msr_index, data);
1156 break;
1157 case MSR_TSC_AUX:
1158 if (!vmx->rdtscp_enabled)
1159 return 1;
1160 /* Check reserved bit, higher 32 bits should be zero */
1161 if ((data >> 32) != 0)
1162 return 1;
1163 /* Otherwise falls through */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001164 default:
Rusty Russell8b9cf982007-07-30 16:31:43 +10001165 msr = find_msr_entry(vmx, msr_index);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001166 if (msr) {
Gleb Natapov542423b2009-08-27 15:07:30 +03001167 vmx_load_host_state(vmx);
Avi Kivity3bab1f52006-12-29 16:49:48 -08001168 msr->data = data;
1169 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001170 }
Eddie Dong2cc51562007-05-21 07:28:09 +03001171 ret = kvm_set_msr_common(vcpu, msr_index, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001172 }
1173
Eddie Dong2cc51562007-05-21 07:28:09 +03001174 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001175}
1176
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001177static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001178{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001179 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
1180 switch (reg) {
1181 case VCPU_REGS_RSP:
1182 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
1183 break;
1184 case VCPU_REGS_RIP:
1185 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
1186 break;
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001187 case VCPU_EXREG_PDPTR:
1188 if (enable_ept)
1189 ept_save_pdptrs(vcpu);
1190 break;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001191 default:
1192 break;
1193 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001194}
1195
Jan Kiszka355be0b2009-10-03 00:31:21 +02001196static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001197{
Jan Kiszkaae675ef2008-12-15 13:52:10 +01001198 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
1199 vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]);
1200 else
1201 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
1202
Avi Kivityabd3f2d2007-05-02 17:57:40 +03001203 update_exception_bitmap(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001204}
1205
1206static __init int cpu_has_kvm_support(void)
1207{
Eduardo Habkost6210e372008-11-17 19:03:16 -02001208 return cpu_has_vmx();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001209}
1210
1211static __init int vmx_disabled_by_bios(void)
1212{
1213 u64 msr;
1214
1215 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
Sheng Yang9ea542f2008-09-11 15:27:49 +08001216 return (msr & (FEATURE_CONTROL_LOCKED |
1217 FEATURE_CONTROL_VMXON_ENABLED))
1218 == FEATURE_CONTROL_LOCKED;
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001219 /* locked but not enabled */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001220}
1221
Alexander Graf10474ae2009-09-15 11:37:46 +02001222static int hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001223{
1224 int cpu = raw_smp_processor_id();
1225 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
1226 u64 old;
1227
Alexander Graf10474ae2009-09-15 11:37:46 +02001228 if (read_cr4() & X86_CR4_VMXE)
1229 return -EBUSY;
1230
Avi Kivity543e4242008-05-13 16:22:47 +03001231 INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001232 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
Sheng Yang9ea542f2008-09-11 15:27:49 +08001233 if ((old & (FEATURE_CONTROL_LOCKED |
1234 FEATURE_CONTROL_VMXON_ENABLED))
1235 != (FEATURE_CONTROL_LOCKED |
1236 FEATURE_CONTROL_VMXON_ENABLED))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001237 /* enable and lock */
Yang, Sheng62b3ffb2007-07-25 12:17:06 +03001238 wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
Sheng Yang9ea542f2008-09-11 15:27:49 +08001239 FEATURE_CONTROL_LOCKED |
1240 FEATURE_CONTROL_VMXON_ENABLED);
Rusty Russell66aee912007-07-17 23:34:16 +10001241 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
Avi Kivity4ecac3f2008-05-13 13:23:38 +03001242 asm volatile (ASM_VMX_VMXON_RAX
1243 : : "a"(&phys_addr), "m"(phys_addr)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001244 : "memory", "cc");
Alexander Graf10474ae2009-09-15 11:37:46 +02001245
1246 ept_sync_global();
1247
1248 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001249}
1250
Avi Kivity543e4242008-05-13 16:22:47 +03001251static void vmclear_local_vcpus(void)
1252{
1253 int cpu = raw_smp_processor_id();
1254 struct vcpu_vmx *vmx, *n;
1255
1256 list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
1257 local_vcpus_link)
1258 __vcpu_clear(vmx);
1259}
1260
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001261
1262/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
1263 * tricks.
1264 */
1265static void kvm_cpu_vmxoff(void)
1266{
1267 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
1268 write_cr4(read_cr4() & ~X86_CR4_VMXE);
1269}
1270
Avi Kivity6aa8b732006-12-10 02:21:36 -08001271static void hardware_disable(void *garbage)
1272{
Avi Kivity543e4242008-05-13 16:22:47 +03001273 vmclear_local_vcpus();
Eduardo Habkost710ff4a2008-11-17 19:03:18 -02001274 kvm_cpu_vmxoff();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001275}
1276
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001277static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
Mike Dayd77c26f2007-10-08 09:02:08 -04001278 u32 msr, u32 *result)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001279{
1280 u32 vmx_msr_low, vmx_msr_high;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001281 u32 ctl = ctl_min | ctl_opt;
1282
1283 rdmsr(msr, vmx_msr_low, vmx_msr_high);
1284
1285 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
1286 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
1287
1288 /* Ensure minimum (required) set of control bits are supported. */
1289 if (ctl_min & ~ctl)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001290 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001291
1292 *result = ctl;
1293 return 0;
1294}
1295
Yang, Sheng002c7f72007-07-31 14:23:01 +03001296static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001297{
1298 u32 vmx_msr_low, vmx_msr_high;
Sheng Yangd56f5462008-04-25 10:13:16 +08001299 u32 min, opt, min2, opt2;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001300 u32 _pin_based_exec_control = 0;
1301 u32 _cpu_based_exec_control = 0;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001302 u32 _cpu_based_2nd_exec_control = 0;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001303 u32 _vmexit_control = 0;
1304 u32 _vmentry_control = 0;
1305
1306 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
Sheng Yangf08864b2008-05-15 18:23:25 +08001307 opt = PIN_BASED_VIRTUAL_NMIS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001308 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
1309 &_pin_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001310 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001311
1312 min = CPU_BASED_HLT_EXITING |
1313#ifdef CONFIG_X86_64
1314 CPU_BASED_CR8_LOAD_EXITING |
1315 CPU_BASED_CR8_STORE_EXITING |
1316#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001317 CPU_BASED_CR3_LOAD_EXITING |
1318 CPU_BASED_CR3_STORE_EXITING |
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001319 CPU_BASED_USE_IO_BITMAPS |
1320 CPU_BASED_MOV_DR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001321 CPU_BASED_USE_TSC_OFFSETING |
Sheng Yang59708672009-12-15 13:29:54 +08001322 CPU_BASED_MWAIT_EXITING |
1323 CPU_BASED_MONITOR_EXITING |
Marcelo Tosattia7052892008-09-23 13:18:35 -03001324 CPU_BASED_INVLPG_EXITING;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001325 opt = CPU_BASED_TPR_SHADOW |
Sheng Yang25c5f222008-03-28 13:18:56 +08001326 CPU_BASED_USE_MSR_BITMAPS |
Sheng Yangf78e0e22007-10-29 09:40:42 +08001327 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001328 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
1329 &_cpu_based_exec_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001330 return -EIO;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08001331#ifdef CONFIG_X86_64
1332 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
1333 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
1334 ~CPU_BASED_CR8_STORE_EXITING;
1335#endif
Sheng Yangf78e0e22007-10-29 09:40:42 +08001336 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
Sheng Yangd56f5462008-04-25 10:13:16 +08001337 min2 = 0;
1338 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
Sheng Yang2384d2b2008-01-17 15:14:33 +08001339 SECONDARY_EXEC_WBINVD_EXITING |
Sheng Yangd56f5462008-04-25 10:13:16 +08001340 SECONDARY_EXEC_ENABLE_VPID |
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001341 SECONDARY_EXEC_ENABLE_EPT |
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001342 SECONDARY_EXEC_UNRESTRICTED_GUEST |
Sheng Yang4e47c7a2009-12-18 16:48:47 +08001343 SECONDARY_EXEC_PAUSE_LOOP_EXITING |
1344 SECONDARY_EXEC_RDTSCP;
Sheng Yangd56f5462008-04-25 10:13:16 +08001345 if (adjust_vmx_controls(min2, opt2,
1346 MSR_IA32_VMX_PROCBASED_CTLS2,
Sheng Yangf78e0e22007-10-29 09:40:42 +08001347 &_cpu_based_2nd_exec_control) < 0)
1348 return -EIO;
1349 }
1350#ifndef CONFIG_X86_64
1351 if (!(_cpu_based_2nd_exec_control &
1352 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
1353 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
1354#endif
Sheng Yangd56f5462008-04-25 10:13:16 +08001355 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
Marcelo Tosattia7052892008-09-23 13:18:35 -03001356 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
1357 enabled */
Gleb Natapov5fff7d22009-08-27 18:41:30 +03001358 _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING |
1359 CPU_BASED_CR3_STORE_EXITING |
1360 CPU_BASED_INVLPG_EXITING);
Sheng Yangd56f5462008-04-25 10:13:16 +08001361 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
1362 vmx_capability.ept, vmx_capability.vpid);
1363 }
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001364
1365 min = 0;
1366#ifdef CONFIG_X86_64
1367 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
1368#endif
Sheng Yang468d4722008-10-09 16:01:55 +08001369 opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001370 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
1371 &_vmexit_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001372 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001373
Sheng Yang468d4722008-10-09 16:01:55 +08001374 min = 0;
1375 opt = VM_ENTRY_LOAD_IA32_PAT;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001376 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
1377 &_vmentry_control) < 0)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001378 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001379
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001380 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001381
1382 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
1383 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001384 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001385
1386#ifdef CONFIG_X86_64
1387 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
1388 if (vmx_msr_high & (1u<<16))
Yang, Sheng002c7f72007-07-31 14:23:01 +03001389 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001390#endif
1391
1392 /* Require Write-Back (WB) memory type for VMCS accesses. */
1393 if (((vmx_msr_high >> 18) & 15) != 6)
Yang, Sheng002c7f72007-07-31 14:23:01 +03001394 return -EIO;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001395
Yang, Sheng002c7f72007-07-31 14:23:01 +03001396 vmcs_conf->size = vmx_msr_high & 0x1fff;
1397 vmcs_conf->order = get_order(vmcs_config.size);
1398 vmcs_conf->revision_id = vmx_msr_low;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001399
Yang, Sheng002c7f72007-07-31 14:23:01 +03001400 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
1401 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
Sheng Yangf78e0e22007-10-29 09:40:42 +08001402 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001403 vmcs_conf->vmexit_ctrl = _vmexit_control;
1404 vmcs_conf->vmentry_ctrl = _vmentry_control;
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001405
1406 return 0;
Nguyen Anh Quynhc68876f2006-12-29 16:49:54 -08001407}
Avi Kivity6aa8b732006-12-10 02:21:36 -08001408
1409static struct vmcs *alloc_vmcs_cpu(int cpu)
1410{
1411 int node = cpu_to_node(cpu);
1412 struct page *pages;
1413 struct vmcs *vmcs;
1414
Mel Gorman6484eb32009-06-16 15:31:54 -07001415 pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001416 if (!pages)
1417 return NULL;
1418 vmcs = page_address(pages);
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001419 memset(vmcs, 0, vmcs_config.size);
1420 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
Avi Kivity6aa8b732006-12-10 02:21:36 -08001421 return vmcs;
1422}
1423
1424static struct vmcs *alloc_vmcs(void)
1425{
Ingo Molnard3b2c332007-01-05 16:36:23 -08001426 return alloc_vmcs_cpu(raw_smp_processor_id());
Avi Kivity6aa8b732006-12-10 02:21:36 -08001427}
1428
1429static void free_vmcs(struct vmcs *vmcs)
1430{
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03001431 free_pages((unsigned long)vmcs, vmcs_config.order);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001432}
1433
Sam Ravnborg39959582007-06-01 00:47:13 -07001434static void free_kvm_area(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001435{
1436 int cpu;
1437
Zachary Amsden3230bb42009-09-29 11:38:37 -10001438 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001439 free_vmcs(per_cpu(vmxarea, cpu));
Zachary Amsden3230bb42009-09-29 11:38:37 -10001440 per_cpu(vmxarea, cpu) = NULL;
1441 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001442}
1443
Avi Kivity6aa8b732006-12-10 02:21:36 -08001444static __init int alloc_kvm_area(void)
1445{
1446 int cpu;
1447
Zachary Amsden3230bb42009-09-29 11:38:37 -10001448 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001449 struct vmcs *vmcs;
1450
1451 vmcs = alloc_vmcs_cpu(cpu);
1452 if (!vmcs) {
1453 free_kvm_area();
1454 return -ENOMEM;
1455 }
1456
1457 per_cpu(vmxarea, cpu) = vmcs;
1458 }
1459 return 0;
1460}
1461
1462static __init int hardware_setup(void)
1463{
Yang, Sheng002c7f72007-07-31 14:23:01 +03001464 if (setup_vmcs_config(&vmcs_config) < 0)
1465 return -EIO;
Joerg Roedel50a37eb2008-01-31 14:57:38 +01001466
1467 if (boot_cpu_has(X86_FEATURE_NX))
1468 kvm_enable_efer_bits(EFER_NX);
1469
Sheng Yang93ba03c2009-04-01 15:52:32 +08001470 if (!cpu_has_vmx_vpid())
1471 enable_vpid = 0;
1472
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001473 if (!cpu_has_vmx_ept()) {
Sheng Yang93ba03c2009-04-01 15:52:32 +08001474 enable_ept = 0;
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001475 enable_unrestricted_guest = 0;
1476 }
1477
1478 if (!cpu_has_vmx_unrestricted_guest())
1479 enable_unrestricted_guest = 0;
Sheng Yang93ba03c2009-04-01 15:52:32 +08001480
1481 if (!cpu_has_vmx_flexpriority())
1482 flexpriority_enabled = 0;
1483
Gleb Natapov95ba8273132009-04-21 17:45:08 +03001484 if (!cpu_has_vmx_tpr_shadow())
1485 kvm_x86_ops->update_cr8_intercept = NULL;
1486
Marcelo Tosatti54dee992009-06-11 12:07:44 -03001487 if (enable_ept && !cpu_has_vmx_ept_2m_page())
1488 kvm_disable_largepages();
1489
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08001490 if (!cpu_has_vmx_ple())
1491 ple_gap = 0;
1492
Avi Kivity6aa8b732006-12-10 02:21:36 -08001493 return alloc_kvm_area();
1494}
1495
1496static __exit void hardware_unsetup(void)
1497{
1498 free_kvm_area();
1499}
1500
Avi Kivity6aa8b732006-12-10 02:21:36 -08001501static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
1502{
1503 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1504
Avi Kivity6af11b92007-03-19 13:18:10 +02001505 if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001506 vmcs_write16(sf->selector, save->selector);
1507 vmcs_writel(sf->base, save->base);
1508 vmcs_write32(sf->limit, save->limit);
1509 vmcs_write32(sf->ar_bytes, save->ar);
1510 } else {
1511 u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
1512 << AR_DPL_SHIFT;
1513 vmcs_write32(sf->ar_bytes, 0x93 | dpl);
1514 }
1515}
1516
1517static void enter_pmode(struct kvm_vcpu *vcpu)
1518{
1519 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001520 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001521
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001522 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001523 vmx->rmode.vm86_active = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001524
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001525 vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base);
1526 vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit);
1527 vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001528
1529 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001530 flags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
1531 flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001532 vmcs_writel(GUEST_RFLAGS, flags);
1533
Rusty Russell66aee912007-07-17 23:34:16 +10001534 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
1535 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
Avi Kivity6aa8b732006-12-10 02:21:36 -08001536
1537 update_exception_bitmap(vcpu);
1538
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001539 if (emulate_invalid_guest_state)
1540 return;
1541
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001542 fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es);
1543 fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds);
1544 fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs);
1545 fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001546
1547 vmcs_write16(GUEST_SS_SELECTOR, 0);
1548 vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
1549
1550 vmcs_write16(GUEST_CS_SELECTOR,
1551 vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
1552 vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
1553}
1554
Mike Dayd77c26f2007-10-08 09:02:08 -04001555static gva_t rmode_tss_base(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001556{
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001557 if (!kvm->arch.tss_addr) {
Marcelo Tosattibc6678a2009-12-23 14:35:21 -02001558 struct kvm_memslots *slots;
1559 gfn_t base_gfn;
1560
Lai Jiangshan90d83dc2010-04-19 17:41:23 +08001561 slots = kvm_memslots(kvm);
Marcelo Tosattibc6678a2009-12-23 14:35:21 -02001562 base_gfn = kvm->memslots->memslots[0].base_gfn +
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -02001563 kvm->memslots->memslots[0].npages - 3;
Izik Eiduscbc94022007-10-25 00:29:55 +02001564 return base_gfn << PAGE_SHIFT;
1565 }
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08001566 return kvm->arch.tss_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001567}
1568
1569static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
1570{
1571 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1572
1573 save->selector = vmcs_read16(sf->selector);
1574 save->base = vmcs_readl(sf->base);
1575 save->limit = vmcs_read32(sf->limit);
1576 save->ar = vmcs_read32(sf->ar_bytes);
Jan Kiszka15b00f32007-11-19 10:21:45 +01001577 vmcs_write16(sf->selector, save->base >> 4);
1578 vmcs_write32(sf->base, save->base & 0xfffff);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001579 vmcs_write32(sf->limit, 0xffff);
1580 vmcs_write32(sf->ar_bytes, 0xf3);
1581}
1582
1583static void enter_rmode(struct kvm_vcpu *vcpu)
1584{
1585 unsigned long flags;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001586 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001587
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001588 if (enable_unrestricted_guest)
1589 return;
1590
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001591 vmx->emulation_required = 1;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001592 vmx->rmode.vm86_active = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001593
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001594 vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001595 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
1596
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001597 vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001598 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
1599
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001600 vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001601 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
1602
1603 flags = vmcs_readl(GUEST_RFLAGS);
Avi Kivity78ac8b42010-04-08 18:19:35 +03001604 vmx->rmode.save_rflags = flags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001605
Glauber de Oliveira Costa053de042008-01-30 13:31:27 +01001606 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001607
1608 vmcs_writel(GUEST_RFLAGS, flags);
Rusty Russell66aee912007-07-17 23:34:16 +10001609 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001610 update_exception_bitmap(vcpu);
1611
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001612 if (emulate_invalid_guest_state)
1613 goto continue_rmode;
1614
Avi Kivity6aa8b732006-12-10 02:21:36 -08001615 vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
1616 vmcs_write32(GUEST_SS_LIMIT, 0xffff);
1617 vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
1618
1619 vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
Michael Riepeabacf8d2006-12-22 01:05:45 -08001620 vmcs_write32(GUEST_CS_LIMIT, 0xffff);
Avi Kivity8cb5b032007-03-20 18:40:40 +02001621 if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
1622 vmcs_writel(GUEST_CS_BASE, 0xf0000);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001623 vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
1624
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001625 fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es);
1626 fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds);
1627 fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs);
1628 fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs);
Avi Kivity75880a02007-06-20 11:20:04 +03001629
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03001630continue_rmode:
Eddie Dong8668a3c2007-10-10 14:26:45 +08001631 kvm_mmu_reset_context(vcpu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08001632 init_rmode(vcpu->kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001633}
1634
Amit Shah401d10d2009-02-20 22:53:37 +05301635static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
1636{
1637 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity26bb0982009-09-07 11:14:12 +03001638 struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
1639
1640 if (!msr)
1641 return;
Amit Shah401d10d2009-02-20 22:53:37 +05301642
Avi Kivity44ea2b12009-09-06 15:55:37 +03001643 /*
1644 * Force kernel_gs_base reloading before EFER changes, as control
1645 * of this msr depends on is_long_mode().
1646 */
1647 vmx_load_host_state(to_vmx(vcpu));
Avi Kivityf6801df2010-01-21 15:31:50 +02001648 vcpu->arch.efer = efer;
Amit Shah401d10d2009-02-20 22:53:37 +05301649 if (efer & EFER_LMA) {
1650 vmcs_write32(VM_ENTRY_CONTROLS,
1651 vmcs_read32(VM_ENTRY_CONTROLS) |
1652 VM_ENTRY_IA32E_MODE);
1653 msr->data = efer;
1654 } else {
1655 vmcs_write32(VM_ENTRY_CONTROLS,
1656 vmcs_read32(VM_ENTRY_CONTROLS) &
1657 ~VM_ENTRY_IA32E_MODE);
1658
1659 msr->data = efer & ~EFER_LME;
1660 }
1661 setup_msrs(vmx);
1662}
1663
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001664#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08001665
1666static void enter_lmode(struct kvm_vcpu *vcpu)
1667{
1668 u32 guest_tr_ar;
1669
1670 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
1671 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
1672 printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08001673 __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001674 vmcs_write32(GUEST_TR_AR_BYTES,
1675 (guest_tr_ar & ~AR_TYPE_MASK)
1676 | AR_TYPE_BUSY_64_TSS);
1677 }
Avi Kivityf6801df2010-01-21 15:31:50 +02001678 vcpu->arch.efer |= EFER_LMA;
1679 vmx_set_efer(vcpu, vcpu->arch.efer);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001680}
1681
1682static void exit_lmode(struct kvm_vcpu *vcpu)
1683{
Avi Kivityf6801df2010-01-21 15:31:50 +02001684 vcpu->arch.efer &= ~EFER_LMA;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001685
1686 vmcs_write32(VM_ENTRY_CONTROLS,
1687 vmcs_read32(VM_ENTRY_CONTROLS)
Li, Xin B1e4e6e02007-08-01 21:49:10 +03001688 & ~VM_ENTRY_IA32E_MODE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001689}
1690
1691#endif
1692
Sheng Yang2384d2b2008-01-17 15:14:33 +08001693static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
1694{
1695 vpid_sync_vcpu_all(to_vmx(vcpu));
Avi Kivity089d0342009-03-23 18:26:32 +02001696 if (enable_ept)
Sheng Yang4e1096d2008-07-06 19:16:51 +08001697 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
Sheng Yang2384d2b2008-01-17 15:14:33 +08001698}
1699
Avi Kivitye8467fd2009-12-29 18:43:06 +02001700static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1701{
1702 ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
1703
1704 vcpu->arch.cr0 &= ~cr0_guest_owned_bits;
1705 vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
1706}
1707
Anthony Liguori25c4c272007-04-27 09:29:21 +03001708static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001709{
Avi Kivityfc78f512009-12-07 12:16:48 +02001710 ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
1711
1712 vcpu->arch.cr4 &= ~cr4_guest_owned_bits;
1713 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits;
Avi Kivity399badf2007-01-05 16:36:38 -08001714}
1715
Sheng Yang14394422008-04-28 12:24:45 +08001716static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
1717{
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001718 if (!test_bit(VCPU_EXREG_PDPTR,
1719 (unsigned long *)&vcpu->arch.regs_dirty))
1720 return;
1721
Sheng Yang14394422008-04-28 12:24:45 +08001722 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
Sheng Yang14394422008-04-28 12:24:45 +08001723 vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]);
1724 vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]);
1725 vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]);
1726 vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]);
1727 }
1728}
1729
Avi Kivity8f5d5492009-05-31 18:41:29 +03001730static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
1731{
1732 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
1733 vcpu->arch.pdptrs[0] = vmcs_read64(GUEST_PDPTR0);
1734 vcpu->arch.pdptrs[1] = vmcs_read64(GUEST_PDPTR1);
1735 vcpu->arch.pdptrs[2] = vmcs_read64(GUEST_PDPTR2);
1736 vcpu->arch.pdptrs[3] = vmcs_read64(GUEST_PDPTR3);
1737 }
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001738
1739 __set_bit(VCPU_EXREG_PDPTR,
1740 (unsigned long *)&vcpu->arch.regs_avail);
1741 __set_bit(VCPU_EXREG_PDPTR,
1742 (unsigned long *)&vcpu->arch.regs_dirty);
Avi Kivity8f5d5492009-05-31 18:41:29 +03001743}
1744
Sheng Yang14394422008-04-28 12:24:45 +08001745static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1746
1747static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
1748 unsigned long cr0,
1749 struct kvm_vcpu *vcpu)
1750{
1751 if (!(cr0 & X86_CR0_PG)) {
1752 /* From paging/starting to nonpaging */
1753 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001754 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
Sheng Yang14394422008-04-28 12:24:45 +08001755 (CPU_BASED_CR3_LOAD_EXITING |
1756 CPU_BASED_CR3_STORE_EXITING));
1757 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001758 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001759 } else if (!is_paging(vcpu)) {
1760 /* From nonpaging to paging */
1761 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
Sheng Yang65267ea2008-06-18 14:43:38 +08001762 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
Sheng Yang14394422008-04-28 12:24:45 +08001763 ~(CPU_BASED_CR3_LOAD_EXITING |
1764 CPU_BASED_CR3_STORE_EXITING));
1765 vcpu->arch.cr0 = cr0;
Avi Kivityfc78f512009-12-07 12:16:48 +02001766 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
Sheng Yang14394422008-04-28 12:24:45 +08001767 }
Sheng Yang95eb84a2009-08-19 09:52:18 +08001768
1769 if (!(cr0 & X86_CR0_WP))
1770 *hw_cr0 &= ~X86_CR0_WP;
Sheng Yang14394422008-04-28 12:24:45 +08001771}
1772
Avi Kivity6aa8b732006-12-10 02:21:36 -08001773static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1774{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001775 struct vcpu_vmx *vmx = to_vmx(vcpu);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001776 unsigned long hw_cr0;
1777
1778 if (enable_unrestricted_guest)
1779 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST)
1780 | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST;
1781 else
1782 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON;
Sheng Yang14394422008-04-28 12:24:45 +08001783
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001784 if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001785 enter_pmode(vcpu);
1786
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001787 if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001788 enter_rmode(vcpu);
1789
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001790#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02001791 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92f2007-07-17 23:19:08 +10001792 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001793 enter_lmode(vcpu);
Rusty Russell707d92f2007-07-17 23:19:08 +10001794 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001795 exit_lmode(vcpu);
1796 }
1797#endif
1798
Avi Kivity089d0342009-03-23 18:26:32 +02001799 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08001800 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
1801
Avi Kivity02daab22009-12-30 12:40:26 +02001802 if (!vcpu->fpu_active)
Avi Kivity81231c62010-01-24 16:26:40 +02001803 hw_cr0 |= X86_CR0_TS | X86_CR0_MP;
Avi Kivity02daab22009-12-30 12:40:26 +02001804
Avi Kivity6aa8b732006-12-10 02:21:36 -08001805 vmcs_writel(CR0_READ_SHADOW, cr0);
Sheng Yang14394422008-04-28 12:24:45 +08001806 vmcs_writel(GUEST_CR0, hw_cr0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001807 vcpu->arch.cr0 = cr0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001808}
1809
Sheng Yang14394422008-04-28 12:24:45 +08001810static u64 construct_eptp(unsigned long root_hpa)
1811{
1812 u64 eptp;
1813
1814 /* TODO write the value reading from MSR */
1815 eptp = VMX_EPT_DEFAULT_MT |
1816 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
1817 eptp |= (root_hpa & PAGE_MASK);
1818
1819 return eptp;
1820}
1821
Avi Kivity6aa8b732006-12-10 02:21:36 -08001822static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
1823{
Sheng Yang14394422008-04-28 12:24:45 +08001824 unsigned long guest_cr3;
1825 u64 eptp;
1826
1827 guest_cr3 = cr3;
Avi Kivity089d0342009-03-23 18:26:32 +02001828 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08001829 eptp = construct_eptp(cr3);
1830 vmcs_write64(EPT_POINTER, eptp);
Sheng Yang14394422008-04-28 12:24:45 +08001831 guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
Sheng Yangb927a3c2009-07-21 10:42:48 +08001832 vcpu->kvm->arch.ept_identity_map_addr;
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02001833 ept_load_pdptrs(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001834 }
1835
Sheng Yang2384d2b2008-01-17 15:14:33 +08001836 vmx_flush_tlb(vcpu);
Sheng Yang14394422008-04-28 12:24:45 +08001837 vmcs_writel(GUEST_CR3, guest_cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001838}
1839
1840static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
1841{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001842 unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ?
Sheng Yang14394422008-04-28 12:24:45 +08001843 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
1844
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001845 vcpu->arch.cr4 = cr4;
Avi Kivitybc230082009-12-08 12:14:42 +02001846 if (enable_ept) {
1847 if (!is_paging(vcpu)) {
1848 hw_cr4 &= ~X86_CR4_PAE;
1849 hw_cr4 |= X86_CR4_PSE;
1850 } else if (!(cr4 & X86_CR4_PAE)) {
1851 hw_cr4 &= ~X86_CR4_PAE;
1852 }
1853 }
Sheng Yang14394422008-04-28 12:24:45 +08001854
1855 vmcs_writel(CR4_READ_SHADOW, cr4);
1856 vmcs_writel(GUEST_CR4, hw_cr4);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001857}
1858
Avi Kivity6aa8b732006-12-10 02:21:36 -08001859static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1860{
1861 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1862
1863 return vmcs_readl(sf->base);
1864}
1865
1866static void vmx_get_segment(struct kvm_vcpu *vcpu,
1867 struct kvm_segment *var, int seg)
1868{
1869 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1870 u32 ar;
1871
1872 var->base = vmcs_readl(sf->base);
1873 var->limit = vmcs_read32(sf->limit);
1874 var->selector = vmcs_read16(sf->selector);
1875 ar = vmcs_read32(sf->ar_bytes);
Avi Kivity9fd4a3b2009-01-04 23:43:42 +02001876 if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001877 ar = 0;
1878 var->type = ar & 15;
1879 var->s = (ar >> 4) & 1;
1880 var->dpl = (ar >> 5) & 3;
1881 var->present = (ar >> 7) & 1;
1882 var->avl = (ar >> 12) & 1;
1883 var->l = (ar >> 13) & 1;
1884 var->db = (ar >> 14) & 1;
1885 var->g = (ar >> 15) & 1;
1886 var->unusable = (ar >> 16) & 1;
1887}
1888
Izik Eidus2e4d2652008-03-24 19:38:34 +02001889static int vmx_get_cpl(struct kvm_vcpu *vcpu)
1890{
Avi Kivity3eeb3282010-01-21 15:31:48 +02001891 if (!is_protmode(vcpu))
Izik Eidus2e4d2652008-03-24 19:38:34 +02001892 return 0;
1893
1894 if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */
1895 return 3;
1896
Avi Kivityeab4b8a2009-08-04 15:02:54 +03001897 return vmcs_read16(GUEST_CS_SELECTOR) & 3;
Izik Eidus2e4d2652008-03-24 19:38:34 +02001898}
1899
Avi Kivity653e3102007-05-07 10:55:37 +03001900static u32 vmx_segment_access_rights(struct kvm_segment *var)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001901{
Avi Kivity6aa8b732006-12-10 02:21:36 -08001902 u32 ar;
1903
Avi Kivity653e3102007-05-07 10:55:37 +03001904 if (var->unusable)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001905 ar = 1 << 16;
1906 else {
1907 ar = var->type & 15;
1908 ar |= (var->s & 1) << 4;
1909 ar |= (var->dpl & 3) << 5;
1910 ar |= (var->present & 1) << 7;
1911 ar |= (var->avl & 1) << 12;
1912 ar |= (var->l & 1) << 13;
1913 ar |= (var->db & 1) << 14;
1914 ar |= (var->g & 1) << 15;
1915 }
Uri Lublinf7fbf1f2006-12-13 00:34:00 -08001916 if (ar == 0) /* a 0 value means unusable */
1917 ar = AR_UNUSABLE_MASK;
Avi Kivity653e3102007-05-07 10:55:37 +03001918
1919 return ar;
1920}
1921
1922static void vmx_set_segment(struct kvm_vcpu *vcpu,
1923 struct kvm_segment *var, int seg)
1924{
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001925 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity653e3102007-05-07 10:55:37 +03001926 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
1927 u32 ar;
1928
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001929 if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) {
1930 vmx->rmode.tr.selector = var->selector;
1931 vmx->rmode.tr.base = var->base;
1932 vmx->rmode.tr.limit = var->limit;
1933 vmx->rmode.tr.ar = vmx_segment_access_rights(var);
Avi Kivity653e3102007-05-07 10:55:37 +03001934 return;
1935 }
1936 vmcs_writel(sf->base, var->base);
1937 vmcs_write32(sf->limit, var->limit);
1938 vmcs_write16(sf->selector, var->selector);
Avi Kivity7ffd92c2009-06-09 14:10:45 +03001939 if (vmx->rmode.vm86_active && var->s) {
Avi Kivity653e3102007-05-07 10:55:37 +03001940 /*
1941 * Hack real-mode segments into vm86 compatibility.
1942 */
1943 if (var->base == 0xffff0000 && var->selector == 0xf000)
1944 vmcs_writel(sf->base, 0xf0000);
1945 ar = 0xf3;
1946 } else
1947 ar = vmx_segment_access_rights(var);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07001948
1949 /*
1950 * Fix the "Accessed" bit in AR field of segment registers for older
1951 * qemu binaries.
1952 * IA32 arch specifies that at the time of processor reset the
1953 * "Accessed" bit in the AR field of segment registers is 1. And qemu
1954 * is setting it to 0 in the usedland code. This causes invalid guest
1955 * state vmexit when "unrestricted guest" mode is turned on.
1956 * Fix for this setup issue in cpu_reset is being pushed in the qemu
1957 * tree. Newer qemu binaries with that qemu fix would not need this
1958 * kvm hack.
1959 */
1960 if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR))
1961 ar |= 0x1; /* Accessed */
1962
Avi Kivity6aa8b732006-12-10 02:21:36 -08001963 vmcs_write32(sf->ar_bytes, ar);
1964}
1965
Avi Kivity6aa8b732006-12-10 02:21:36 -08001966static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
1967{
1968 u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
1969
1970 *db = (ar >> 14) & 1;
1971 *l = (ar >> 13) & 1;
1972}
1973
Gleb Natapov89a27f42010-02-16 10:51:48 +02001974static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001975{
Gleb Natapov89a27f42010-02-16 10:51:48 +02001976 dt->size = vmcs_read32(GUEST_IDTR_LIMIT);
1977 dt->address = vmcs_readl(GUEST_IDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001978}
1979
Gleb Natapov89a27f42010-02-16 10:51:48 +02001980static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001981{
Gleb Natapov89a27f42010-02-16 10:51:48 +02001982 vmcs_write32(GUEST_IDTR_LIMIT, dt->size);
1983 vmcs_writel(GUEST_IDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001984}
1985
Gleb Natapov89a27f42010-02-16 10:51:48 +02001986static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001987{
Gleb Natapov89a27f42010-02-16 10:51:48 +02001988 dt->size = vmcs_read32(GUEST_GDTR_LIMIT);
1989 dt->address = vmcs_readl(GUEST_GDTR_BASE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001990}
1991
Gleb Natapov89a27f42010-02-16 10:51:48 +02001992static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001993{
Gleb Natapov89a27f42010-02-16 10:51:48 +02001994 vmcs_write32(GUEST_GDTR_LIMIT, dt->size);
1995 vmcs_writel(GUEST_GDTR_BASE, dt->address);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001996}
1997
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03001998static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
1999{
2000 struct kvm_segment var;
2001 u32 ar;
2002
2003 vmx_get_segment(vcpu, &var, seg);
2004 ar = vmx_segment_access_rights(&var);
2005
2006 if (var.base != (var.selector << 4))
2007 return false;
2008 if (var.limit != 0xffff)
2009 return false;
2010 if (ar != 0xf3)
2011 return false;
2012
2013 return true;
2014}
2015
2016static bool code_segment_valid(struct kvm_vcpu *vcpu)
2017{
2018 struct kvm_segment cs;
2019 unsigned int cs_rpl;
2020
2021 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2022 cs_rpl = cs.selector & SELECTOR_RPL_MASK;
2023
Avi Kivity1872a3f2009-01-04 23:26:52 +02002024 if (cs.unusable)
2025 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002026 if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
2027 return false;
2028 if (!cs.s)
2029 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002030 if (cs.type & AR_TYPE_WRITEABLE_MASK) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002031 if (cs.dpl > cs_rpl)
2032 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002033 } else {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002034 if (cs.dpl != cs_rpl)
2035 return false;
2036 }
2037 if (!cs.present)
2038 return false;
2039
2040 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
2041 return true;
2042}
2043
2044static bool stack_segment_valid(struct kvm_vcpu *vcpu)
2045{
2046 struct kvm_segment ss;
2047 unsigned int ss_rpl;
2048
2049 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2050 ss_rpl = ss.selector & SELECTOR_RPL_MASK;
2051
Avi Kivity1872a3f2009-01-04 23:26:52 +02002052 if (ss.unusable)
2053 return true;
2054 if (ss.type != 3 && ss.type != 7)
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002055 return false;
2056 if (!ss.s)
2057 return false;
2058 if (ss.dpl != ss_rpl) /* DPL != RPL */
2059 return false;
2060 if (!ss.present)
2061 return false;
2062
2063 return true;
2064}
2065
2066static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
2067{
2068 struct kvm_segment var;
2069 unsigned int rpl;
2070
2071 vmx_get_segment(vcpu, &var, seg);
2072 rpl = var.selector & SELECTOR_RPL_MASK;
2073
Avi Kivity1872a3f2009-01-04 23:26:52 +02002074 if (var.unusable)
2075 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002076 if (!var.s)
2077 return false;
2078 if (!var.present)
2079 return false;
2080 if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
2081 if (var.dpl < rpl) /* DPL < RPL */
2082 return false;
2083 }
2084
2085 /* TODO: Add other members to kvm_segment_field to allow checking for other access
2086 * rights flags
2087 */
2088 return true;
2089}
2090
2091static bool tr_valid(struct kvm_vcpu *vcpu)
2092{
2093 struct kvm_segment tr;
2094
2095 vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);
2096
Avi Kivity1872a3f2009-01-04 23:26:52 +02002097 if (tr.unusable)
2098 return false;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002099 if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2100 return false;
Avi Kivity1872a3f2009-01-04 23:26:52 +02002101 if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002102 return false;
2103 if (!tr.present)
2104 return false;
2105
2106 return true;
2107}
2108
2109static bool ldtr_valid(struct kvm_vcpu *vcpu)
2110{
2111 struct kvm_segment ldtr;
2112
2113 vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);
2114
Avi Kivity1872a3f2009-01-04 23:26:52 +02002115 if (ldtr.unusable)
2116 return true;
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002117 if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */
2118 return false;
2119 if (ldtr.type != 2)
2120 return false;
2121 if (!ldtr.present)
2122 return false;
2123
2124 return true;
2125}
2126
2127static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
2128{
2129 struct kvm_segment cs, ss;
2130
2131 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
2132 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
2133
2134 return ((cs.selector & SELECTOR_RPL_MASK) ==
2135 (ss.selector & SELECTOR_RPL_MASK));
2136}
2137
2138/*
2139 * Check if guest state is valid. Returns true if valid, false if
2140 * not.
2141 * We assume that registers are always usable
2142 */
2143static bool guest_state_valid(struct kvm_vcpu *vcpu)
2144{
2145 /* real mode guest state checks */
Avi Kivity3eeb3282010-01-21 15:31:48 +02002146 if (!is_protmode(vcpu)) {
Mohammed Gamal648dfaa2008-08-17 16:38:32 +03002147 if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
2148 return false;
2149 if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
2150 return false;
2151 if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
2152 return false;
2153 if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
2154 return false;
2155 if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
2156 return false;
2157 if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
2158 return false;
2159 } else {
2160 /* protected mode guest state checks */
2161 if (!cs_ss_rpl_check(vcpu))
2162 return false;
2163 if (!code_segment_valid(vcpu))
2164 return false;
2165 if (!stack_segment_valid(vcpu))
2166 return false;
2167 if (!data_segment_valid(vcpu, VCPU_SREG_DS))
2168 return false;
2169 if (!data_segment_valid(vcpu, VCPU_SREG_ES))
2170 return false;
2171 if (!data_segment_valid(vcpu, VCPU_SREG_FS))
2172 return false;
2173 if (!data_segment_valid(vcpu, VCPU_SREG_GS))
2174 return false;
2175 if (!tr_valid(vcpu))
2176 return false;
2177 if (!ldtr_valid(vcpu))
2178 return false;
2179 }
2180 /* TODO:
2181 * - Add checks on RIP
2182 * - Add checks on RFLAGS
2183 */
2184
2185 return true;
2186}
2187
Mike Dayd77c26f2007-10-08 09:02:08 -04002188static int init_rmode_tss(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002189{
Avi Kivity6aa8b732006-12-10 02:21:36 -08002190 gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
Izik Eidus195aefd2007-10-01 22:14:18 +02002191 u16 data = 0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002192 int ret = 0;
Izik Eidus195aefd2007-10-01 22:14:18 +02002193 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002194
Izik Eidus195aefd2007-10-01 22:14:18 +02002195 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2196 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002197 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002198 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
Sheng Yang464d17c2008-08-13 14:10:33 +08002199 r = kvm_write_guest_page(kvm, fn++, &data,
2200 TSS_IOPB_BASE_OFFSET, sizeof(u16));
Izik Eidus195aefd2007-10-01 22:14:18 +02002201 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002202 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002203 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
2204 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002205 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002206 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
2207 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002208 goto out;
Izik Eidus195aefd2007-10-01 22:14:18 +02002209 data = ~0;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002210 r = kvm_write_guest_page(kvm, fn, &data,
2211 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
2212 sizeof(u8));
Izik Eidus195aefd2007-10-01 22:14:18 +02002213 if (r < 0)
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002214 goto out;
2215
2216 ret = 1;
2217out:
Marcelo Tosatti10589a42007-12-20 19:18:22 -05002218 return ret;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002219}
2220
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002221static int init_rmode_identity_map(struct kvm *kvm)
2222{
2223 int i, r, ret;
2224 pfn_t identity_map_pfn;
2225 u32 tmp;
2226
Avi Kivity089d0342009-03-23 18:26:32 +02002227 if (!enable_ept)
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002228 return 1;
2229 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
2230 printk(KERN_ERR "EPT: identity-mapping pagetable "
2231 "haven't been allocated!\n");
2232 return 0;
2233 }
2234 if (likely(kvm->arch.ept_identity_pagetable_done))
2235 return 1;
2236 ret = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002237 identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002238 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
2239 if (r < 0)
2240 goto out;
2241 /* Set up identity-mapping pagetable for EPT in real mode */
2242 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
2243 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
2244 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
2245 r = kvm_write_guest_page(kvm, identity_map_pfn,
2246 &tmp, i * sizeof(tmp), sizeof(tmp));
2247 if (r < 0)
2248 goto out;
2249 }
2250 kvm->arch.ept_identity_pagetable_done = true;
2251 ret = 1;
2252out:
2253 return ret;
2254}
2255
Avi Kivity6aa8b732006-12-10 02:21:36 -08002256static void seg_setup(int seg)
2257{
2258 struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002259 unsigned int ar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002260
2261 vmcs_write16(sf->selector, 0);
2262 vmcs_writel(sf->base, 0);
2263 vmcs_write32(sf->limit, 0xffff);
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002264 if (enable_unrestricted_guest) {
2265 ar = 0x93;
2266 if (seg == VCPU_SREG_CS)
2267 ar |= 0x08; /* code segment */
2268 } else
2269 ar = 0xf3;
2270
2271 vmcs_write32(sf->ar_bytes, ar);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002272}
2273
Sheng Yangf78e0e22007-10-29 09:40:42 +08002274static int alloc_apic_access_page(struct kvm *kvm)
2275{
2276 struct kvm_userspace_memory_region kvm_userspace_mem;
2277 int r = 0;
2278
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002279 mutex_lock(&kvm->slots_lock);
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002280 if (kvm->arch.apic_access_page)
Sheng Yangf78e0e22007-10-29 09:40:42 +08002281 goto out;
2282 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
2283 kvm_userspace_mem.flags = 0;
2284 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
2285 kvm_userspace_mem.memory_size = PAGE_SIZE;
2286 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2287 if (r)
2288 goto out;
Izik Eidus72dc67a2008-02-10 18:04:15 +02002289
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002290 kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002291out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002292 mutex_unlock(&kvm->slots_lock);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002293 return r;
2294}
2295
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002296static int alloc_identity_pagetable(struct kvm *kvm)
2297{
2298 struct kvm_userspace_memory_region kvm_userspace_mem;
2299 int r = 0;
2300
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002301 mutex_lock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002302 if (kvm->arch.ept_identity_pagetable)
2303 goto out;
2304 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
2305 kvm_userspace_mem.flags = 0;
Sheng Yangb927a3c2009-07-21 10:42:48 +08002306 kvm_userspace_mem.guest_phys_addr =
2307 kvm->arch.ept_identity_map_addr;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002308 kvm_userspace_mem.memory_size = PAGE_SIZE;
2309 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
2310 if (r)
2311 goto out;
2312
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002313 kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
Sheng Yangb927a3c2009-07-21 10:42:48 +08002314 kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002315out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002316 mutex_unlock(&kvm->slots_lock);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002317 return r;
2318}
2319
Sheng Yang2384d2b2008-01-17 15:14:33 +08002320static void allocate_vpid(struct vcpu_vmx *vmx)
2321{
2322 int vpid;
2323
2324 vmx->vpid = 0;
Avi Kivity919818a2009-03-23 18:01:29 +02002325 if (!enable_vpid)
Sheng Yang2384d2b2008-01-17 15:14:33 +08002326 return;
2327 spin_lock(&vmx_vpid_lock);
2328 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
2329 if (vpid < VMX_NR_VPIDS) {
2330 vmx->vpid = vpid;
2331 __set_bit(vpid, vmx_vpid_bitmap);
2332 }
2333 spin_unlock(&vmx_vpid_lock);
2334}
2335
Avi Kivity58972972009-02-24 22:26:47 +02002336static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr)
Sheng Yang25c5f222008-03-28 13:18:56 +08002337{
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002338 int f = sizeof(unsigned long);
Sheng Yang25c5f222008-03-28 13:18:56 +08002339
2340 if (!cpu_has_vmx_msr_bitmap())
2341 return;
2342
2343 /*
2344 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
2345 * have the write-low and read-high bitmap offsets the wrong way round.
2346 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
2347 */
Sheng Yang25c5f222008-03-28 13:18:56 +08002348 if (msr <= 0x1fff) {
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002349 __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */
2350 __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */
Sheng Yang25c5f222008-03-28 13:18:56 +08002351 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
2352 msr &= 0x1fff;
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002353 __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */
2354 __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */
Sheng Yang25c5f222008-03-28 13:18:56 +08002355 }
Sheng Yang25c5f222008-03-28 13:18:56 +08002356}
2357
Avi Kivity58972972009-02-24 22:26:47 +02002358static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only)
2359{
2360 if (!longmode_only)
2361 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr);
2362 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr);
2363}
2364
Avi Kivity6aa8b732006-12-10 02:21:36 -08002365/*
2366 * Sets up the vmcs for emulated real mode.
2367 */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002368static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002369{
Sheng Yang468d4722008-10-09 16:01:55 +08002370 u32 host_sysenter_cs, msr_low, msr_high;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002371 u32 junk;
Marcelo Tosatti53f658b2008-12-11 20:45:05 +01002372 u64 host_pat, tsc_this, tsc_base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002373 unsigned long a;
Gleb Natapov89a27f42010-02-16 10:51:48 +02002374 struct desc_ptr dt;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002375 int i;
Avi Kivitycd2276a2007-05-14 20:41:13 +03002376 unsigned long kvm_vmx_return;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002377 u32 exec_control;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002378
Avi Kivity6aa8b732006-12-10 02:21:36 -08002379 /* I/O */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02002380 vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a));
2381 vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002382
Sheng Yang25c5f222008-03-28 13:18:56 +08002383 if (cpu_has_vmx_msr_bitmap())
Avi Kivity58972972009-02-24 22:26:47 +02002384 vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy));
Sheng Yang25c5f222008-03-28 13:18:56 +08002385
Avi Kivity6aa8b732006-12-10 02:21:36 -08002386 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
2387
Avi Kivity6aa8b732006-12-10 02:21:36 -08002388 /* Control */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002389 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
2390 vmcs_config.pin_based_exec_ctrl);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002391
2392 exec_control = vmcs_config.cpu_based_exec_ctrl;
2393 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
2394 exec_control &= ~CPU_BASED_TPR_SHADOW;
2395#ifdef CONFIG_X86_64
2396 exec_control |= CPU_BASED_CR8_STORE_EXITING |
2397 CPU_BASED_CR8_LOAD_EXITING;
2398#endif
2399 }
Avi Kivity089d0342009-03-23 18:26:32 +02002400 if (!enable_ept)
Sheng Yangd56f5462008-04-25 10:13:16 +08002401 exec_control |= CPU_BASED_CR3_STORE_EXITING |
Marcelo Tosatti83dbc832008-10-07 17:01:27 -03002402 CPU_BASED_CR3_LOAD_EXITING |
2403 CPU_BASED_INVLPG_EXITING;
Yang, Sheng6e5d8652007-09-12 18:03:11 +08002404 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002405
Sheng Yang83ff3b92007-11-21 14:33:25 +08002406 if (cpu_has_secondary_exec_ctrls()) {
2407 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
2408 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2409 exec_control &=
2410 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
Sheng Yang2384d2b2008-01-17 15:14:33 +08002411 if (vmx->vpid == 0)
2412 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
Sheng Yang046d8712009-11-27 16:46:26 +08002413 if (!enable_ept) {
Sheng Yangd56f5462008-04-25 10:13:16 +08002414 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
Sheng Yang046d8712009-11-27 16:46:26 +08002415 enable_unrestricted_guest = 0;
2416 }
Nitin A Kamble3a624e22009-06-08 11:34:16 -07002417 if (!enable_unrestricted_guest)
2418 exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002419 if (!ple_gap)
2420 exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
Sheng Yang83ff3b92007-11-21 14:33:25 +08002421 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
2422 }
Sheng Yangf78e0e22007-10-29 09:40:42 +08002423
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08002424 if (ple_gap) {
2425 vmcs_write32(PLE_GAP, ple_gap);
2426 vmcs_write32(PLE_WINDOW, ple_window);
2427 }
2428
Avi Kivityc7addb92007-09-16 18:58:32 +02002429 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
2430 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002431 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
2432
2433 vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */
2434 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
2435 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
2436
2437 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
2438 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
2439 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivityd6e88ae2008-07-10 16:53:33 +03002440 vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs()); /* 22.2.4 */
2441 vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs()); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002442 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
Avi Kivity05b3e0c2006-12-13 00:33:45 -08002443#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08002444 rdmsrl(MSR_FS_BASE, a);
2445 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
2446 rdmsrl(MSR_GS_BASE, a);
2447 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
2448#else
2449 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
2450 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
2451#endif
2452
2453 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
2454
Wei Yongjunec687982010-03-05 12:11:48 +08002455 native_store_idt(&dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02002456 vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
Avi Kivity6aa8b732006-12-10 02:21:36 -08002457
Mike Dayd77c26f2007-10-08 09:02:08 -04002458 asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
Avi Kivitycd2276a2007-05-14 20:41:13 +03002459 vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
Eddie Dong2cc51562007-05-21 07:28:09 +03002460 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
2461 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
2462 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002463
2464 rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
2465 vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
2466 rdmsrl(MSR_IA32_SYSENTER_ESP, a);
2467 vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
2468 rdmsrl(MSR_IA32_SYSENTER_EIP, a);
2469 vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
2470
Sheng Yang468d4722008-10-09 16:01:55 +08002471 if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
2472 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2473 host_pat = msr_low | ((u64) msr_high << 32);
2474 vmcs_write64(HOST_IA32_PAT, host_pat);
2475 }
2476 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2477 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
2478 host_pat = msr_low | ((u64) msr_high << 32);
2479 /* Write the default value follow host pat */
2480 vmcs_write64(GUEST_IA32_PAT, host_pat);
2481 /* Keep arch.pat sync with GUEST_IA32_PAT */
2482 vmx->vcpu.arch.pat = host_pat;
2483 }
2484
Avi Kivity6aa8b732006-12-10 02:21:36 -08002485 for (i = 0; i < NR_VMX_MSR; ++i) {
2486 u32 index = vmx_msr_index[i];
2487 u32 data_low, data_high;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002488 int j = vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002489
2490 if (rdmsr_safe(index, &data_low, &data_high) < 0)
2491 continue;
Avi Kivity432bd6c2007-01-31 23:48:13 -08002492 if (wrmsr_safe(index, data_low, data_high) < 0)
2493 continue;
Avi Kivity26bb0982009-09-07 11:14:12 +03002494 vmx->guest_msrs[j].index = i;
2495 vmx->guest_msrs[j].data = 0;
Avi Kivityd5696722009-12-02 12:28:47 +02002496 vmx->guest_msrs[j].mask = -1ull;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04002497 ++vmx->nmsrs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002498 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002499
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002500 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002501
2502 /* 22.2.1, 20.8.1 */
Yang, Sheng1c3d14f2007-07-29 11:07:42 +03002503 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
2504
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002505 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
Avi Kivity4c386092009-12-07 12:26:18 +02002506 vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS;
Avi Kivityce03e4f2009-12-07 12:29:14 +02002507 if (enable_ept)
2508 vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE;
Avi Kivity4c386092009-12-07 12:26:18 +02002509 vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002510
Marcelo Tosatti53f658b2008-12-11 20:45:05 +01002511 tsc_base = vmx->vcpu.kvm->arch.vm_init_tsc;
2512 rdtscll(tsc_this);
2513 if (tsc_this < vmx->vcpu.kvm->arch.vm_init_tsc)
2514 tsc_base = tsc_this;
2515
2516 guest_write_tsc(0, tsc_base);
Sheng Yangf78e0e22007-10-29 09:40:42 +08002517
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002518 return 0;
2519}
2520
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002521static int init_rmode(struct kvm *kvm)
2522{
2523 if (!init_rmode_tss(kvm))
2524 return 0;
2525 if (!init_rmode_identity_map(kvm))
2526 return 0;
2527 return 1;
2528}
2529
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002530static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
2531{
2532 struct vcpu_vmx *vmx = to_vmx(vcpu);
2533 u64 msr;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002534 int ret, idx;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002535
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002536 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002537 idx = srcu_read_lock(&vcpu->kvm->srcu);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08002538 if (!init_rmode(vmx->vcpu.kvm)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002539 ret = -ENOMEM;
2540 goto out;
2541 }
2542
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002543 vmx->rmode.vm86_active = 0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002544
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002545 vmx->soft_vnmi_blocked = 0;
2546
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002547 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02002548 kvm_set_cr8(&vmx->vcpu, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002549 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002550 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002551 msr |= MSR_IA32_APICBASE_BSP;
2552 kvm_set_apic_base(&vmx->vcpu, msr);
2553
2554 fx_init(&vmx->vcpu);
2555
Avi Kivity5706be02008-08-20 15:07:31 +03002556 seg_setup(VCPU_SREG_CS);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002557 /*
2558 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
2559 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
2560 */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002561 if (kvm_vcpu_is_bsp(&vmx->vcpu)) {
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002562 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
2563 vmcs_writel(GUEST_CS_BASE, 0x000f0000);
2564 } else {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002565 vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
2566 vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002567 }
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002568
2569 seg_setup(VCPU_SREG_DS);
2570 seg_setup(VCPU_SREG_ES);
2571 seg_setup(VCPU_SREG_FS);
2572 seg_setup(VCPU_SREG_GS);
2573 seg_setup(VCPU_SREG_SS);
2574
2575 vmcs_write16(GUEST_TR_SELECTOR, 0);
2576 vmcs_writel(GUEST_TR_BASE, 0);
2577 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
2578 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2579
2580 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
2581 vmcs_writel(GUEST_LDTR_BASE, 0);
2582 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
2583 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
2584
2585 vmcs_write32(GUEST_SYSENTER_CS, 0);
2586 vmcs_writel(GUEST_SYSENTER_ESP, 0);
2587 vmcs_writel(GUEST_SYSENTER_EIP, 0);
2588
2589 vmcs_writel(GUEST_RFLAGS, 0x02);
Gleb Natapovc5af89b2009-06-09 15:56:26 +03002590 if (kvm_vcpu_is_bsp(&vmx->vcpu))
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002591 kvm_rip_write(vcpu, 0xfff0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002592 else
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002593 kvm_rip_write(vcpu, 0);
2594 kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002595
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002596 vmcs_writel(GUEST_DR7, 0x400);
2597
2598 vmcs_writel(GUEST_GDTR_BASE, 0);
2599 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
2600
2601 vmcs_writel(GUEST_IDTR_BASE, 0);
2602 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
2603
2604 vmcs_write32(GUEST_ACTIVITY_STATE, 0);
2605 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
2606 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
2607
Avi Kivitye00c8cf2007-10-21 11:00:39 +02002608 /* Special registers */
2609 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
2610
2611 setup_msrs(vmx);
2612
Avi Kivity6aa8b732006-12-10 02:21:36 -08002613 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
2614
Sheng Yangf78e0e22007-10-29 09:40:42 +08002615 if (cpu_has_vmx_tpr_shadow()) {
2616 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
2617 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
2618 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002619 page_to_phys(vmx->vcpu.arch.apic->regs_page));
Sheng Yangf78e0e22007-10-29 09:40:42 +08002620 vmcs_write32(TPR_THRESHOLD, 0);
2621 }
2622
2623 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
2624 vmcs_write64(APIC_ACCESS_ADDR,
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002625 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
Avi Kivity6aa8b732006-12-10 02:21:36 -08002626
Sheng Yang2384d2b2008-01-17 15:14:33 +08002627 if (vmx->vpid != 0)
2628 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
2629
Eduardo Habkostfa400522009-10-24 02:49:58 -02002630 vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
Avi Kivity4d4ec082009-12-29 18:07:30 +02002631 vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
Rusty Russell8b9cf982007-07-30 16:31:43 +10002632 vmx_set_cr4(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002633 vmx_set_efer(&vmx->vcpu, 0);
Rusty Russell8b9cf982007-07-30 16:31:43 +10002634 vmx_fpu_activate(&vmx->vcpu);
2635 update_exception_bitmap(&vmx->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002636
Sheng Yang2384d2b2008-01-17 15:14:33 +08002637 vpid_sync_vcpu_all(vmx);
2638
Marcelo Tosatti3200f402008-03-29 20:17:59 -03002639 ret = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002640
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03002641 /* HACK: Don't enable emulation on guest boot/reset */
2642 vmx->emulation_required = 0;
2643
Avi Kivity6aa8b732006-12-10 02:21:36 -08002644out:
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002645 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002646 return ret;
2647}
2648
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002649static void enable_irq_window(struct kvm_vcpu *vcpu)
2650{
2651 u32 cpu_based_vm_exec_control;
2652
2653 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2654 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
2655 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2656}
2657
2658static void enable_nmi_window(struct kvm_vcpu *vcpu)
2659{
2660 u32 cpu_based_vm_exec_control;
2661
2662 if (!cpu_has_virtual_nmis()) {
2663 enable_irq_window(vcpu);
2664 return;
2665 }
2666
2667 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2668 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
2669 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2670}
2671
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002672static void vmx_inject_irq(struct kvm_vcpu *vcpu)
Eddie Dong85f455f2007-07-06 12:20:49 +03002673{
Avi Kivity9c8cba32007-11-22 11:42:59 +02002674 struct vcpu_vmx *vmx = to_vmx(vcpu);
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002675 uint32_t intr;
2676 int irq = vcpu->arch.interrupt.nr;
Avi Kivity9c8cba32007-11-22 11:42:59 +02002677
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002678 trace_kvm_inj_virq(irq);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04002679
Avi Kivityfa89a812008-09-01 15:57:51 +03002680 ++vcpu->stat.irq_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002681 if (vmx->rmode.vm86_active) {
Avi Kivity9c8cba32007-11-22 11:42:59 +02002682 vmx->rmode.irq.pending = true;
2683 vmx->rmode.irq.vector = irq;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002684 vmx->rmode.irq.rip = kvm_rip_read(vcpu);
Gleb Natapovae0bb3e2009-05-19 11:07:10 +03002685 if (vcpu->arch.interrupt.soft)
2686 vmx->rmode.irq.rip +=
2687 vmx->vcpu.arch.event_exit_inst_len;
Avi Kivity9c5623e2007-11-08 18:19:20 +02002688 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2689 irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK);
2690 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002691 kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
Eddie Dong85f455f2007-07-06 12:20:49 +03002692 return;
2693 }
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002694 intr = irq | INTR_INFO_VALID_MASK;
2695 if (vcpu->arch.interrupt.soft) {
2696 intr |= INTR_TYPE_SOFT_INTR;
2697 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
2698 vmx->vcpu.arch.event_exit_inst_len);
2699 } else
2700 intr |= INTR_TYPE_EXT_INTR;
2701 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
Eddie Dong85f455f2007-07-06 12:20:49 +03002702}
2703
Sheng Yangf08864b2008-05-15 18:23:25 +08002704static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
2705{
Jan Kiszka66a5a342008-09-26 09:30:51 +02002706 struct vcpu_vmx *vmx = to_vmx(vcpu);
2707
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002708 if (!cpu_has_virtual_nmis()) {
2709 /*
2710 * Tracking the NMI-blocked state in software is built upon
2711 * finding the next open IRQ window. This, in turn, depends on
2712 * well-behaving guests: They have to keep IRQs disabled at
2713 * least as long as the NMI handler runs. Otherwise we may
2714 * cause NMI nesting, maybe breaking the guest. But as this is
2715 * highly unlikely, we can live with the residual risk.
2716 */
2717 vmx->soft_vnmi_blocked = 1;
2718 vmx->vnmi_blocked_time = 0;
2719 }
2720
Jan Kiszka487b3912008-09-26 09:30:56 +02002721 ++vcpu->stat.nmi_injections;
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002722 if (vmx->rmode.vm86_active) {
Jan Kiszka66a5a342008-09-26 09:30:51 +02002723 vmx->rmode.irq.pending = true;
2724 vmx->rmode.irq.vector = NMI_VECTOR;
2725 vmx->rmode.irq.rip = kvm_rip_read(vcpu);
2726 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2727 NMI_VECTOR | INTR_TYPE_SOFT_INTR |
2728 INTR_INFO_VALID_MASK);
2729 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
2730 kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
2731 return;
2732 }
Sheng Yangf08864b2008-05-15 18:23:25 +08002733 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
2734 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
Sheng Yangf08864b2008-05-15 18:23:25 +08002735}
2736
Gleb Natapovc4282df2009-04-21 17:45:07 +03002737static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
Jan Kiszka33f089c2008-09-26 09:30:49 +02002738{
Jan Kiszka3b86cd92008-09-26 09:30:57 +02002739 if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
Gleb Natapovc4282df2009-04-21 17:45:07 +03002740 return 0;
Jan Kiszka33f089c2008-09-26 09:30:49 +02002741
Gleb Natapovc4282df2009-04-21 17:45:07 +03002742 return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2743 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS |
2744 GUEST_INTR_STATE_NMI));
Jan Kiszka33f089c2008-09-26 09:30:49 +02002745}
2746
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002747static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
2748{
2749 if (!cpu_has_virtual_nmis())
2750 return to_vmx(vcpu)->soft_vnmi_blocked;
2751 else
2752 return !!(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2753 GUEST_INTR_STATE_NMI);
2754}
2755
2756static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
2757{
2758 struct vcpu_vmx *vmx = to_vmx(vcpu);
2759
2760 if (!cpu_has_virtual_nmis()) {
2761 if (vmx->soft_vnmi_blocked != masked) {
2762 vmx->soft_vnmi_blocked = masked;
2763 vmx->vnmi_blocked_time = 0;
2764 }
2765 } else {
2766 if (masked)
2767 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
2768 GUEST_INTR_STATE_NMI);
2769 else
2770 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
2771 GUEST_INTR_STATE_NMI);
2772 }
2773}
2774
Gleb Natapov78646122009-03-23 12:12:11 +02002775static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
2776{
Gleb Natapovc4282df2009-04-21 17:45:07 +03002777 return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
2778 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
2779 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
Gleb Natapov78646122009-03-23 12:12:11 +02002780}
2781
Izik Eiduscbc94022007-10-25 00:29:55 +02002782static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
2783{
2784 int ret;
2785 struct kvm_userspace_memory_region tss_mem = {
Sheng Yang6fe63972008-10-16 17:30:58 +08002786 .slot = TSS_PRIVATE_MEMSLOT,
Izik Eiduscbc94022007-10-25 00:29:55 +02002787 .guest_phys_addr = addr,
2788 .memory_size = PAGE_SIZE * 3,
2789 .flags = 0,
2790 };
2791
2792 ret = kvm_set_memory_region(kvm, &tss_mem, 0);
2793 if (ret)
2794 return ret;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +08002795 kvm->arch.tss_addr = addr;
Izik Eiduscbc94022007-10-25 00:29:55 +02002796 return 0;
2797}
2798
Avi Kivity6aa8b732006-12-10 02:21:36 -08002799static int handle_rmode_exception(struct kvm_vcpu *vcpu,
2800 int vec, u32 err_code)
2801{
Nitin A Kambleb3f37702007-05-17 15:50:34 +03002802 /*
2803 * Instruction with address size override prefix opcode 0x67
2804 * Cause the #SS fault with 0 error code in VM86 mode.
2805 */
2806 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
Avi Kivity851ba692009-08-24 11:10:17 +03002807 if (emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002808 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002809 /*
2810 * Forward all other exceptions that are valid in real mode.
2811 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
2812 * the required debugging infrastructure rework.
2813 */
2814 switch (vec) {
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002815 case DB_VECTOR:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002816 if (vcpu->guest_debug &
2817 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
2818 return 0;
2819 kvm_queue_exception(vcpu, vec);
2820 return 1;
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002821 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01002822 /*
2823 * Update instruction length as we may reinject the exception
2824 * from user space while in guest debugging mode.
2825 */
2826 to_vmx(vcpu)->vcpu.arch.event_exit_inst_len =
2827 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002828 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
2829 return 0;
2830 /* fall through */
2831 case DE_VECTOR:
Jan Kiszka77ab6db2008-07-14 12:28:51 +02002832 case OF_VECTOR:
2833 case BR_VECTOR:
2834 case UD_VECTOR:
2835 case DF_VECTOR:
2836 case SS_VECTOR:
2837 case GP_VECTOR:
2838 case MF_VECTOR:
2839 kvm_queue_exception(vcpu, vec);
2840 return 1;
2841 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002842 return 0;
2843}
2844
Andi Kleena0861c02009-06-08 17:37:09 +08002845/*
2846 * Trigger machine check on the host. We assume all the MSRs are already set up
2847 * by the CPU and that we still run on the same CPU as the MCE occurred on.
2848 * We pass a fake environment to the machine check handler because we want
2849 * the guest to be always treated like user space, no matter what context
2850 * it used internally.
2851 */
2852static void kvm_machine_check(void)
2853{
2854#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
2855 struct pt_regs regs = {
2856 .cs = 3, /* Fake ring 3 no matter what the guest ran on */
2857 .flags = X86_EFLAGS_IF,
2858 };
2859
2860 do_machine_check(&regs, 0);
2861#endif
2862}
2863
Avi Kivity851ba692009-08-24 11:10:17 +03002864static int handle_machine_check(struct kvm_vcpu *vcpu)
Andi Kleena0861c02009-06-08 17:37:09 +08002865{
2866 /* already handled by vcpu_run */
2867 return 1;
2868}
2869
Avi Kivity851ba692009-08-24 11:10:17 +03002870static int handle_exception(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002871{
Avi Kivity1155f762007-11-22 11:30:47 +02002872 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03002873 struct kvm_run *kvm_run = vcpu->run;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002874 u32 intr_info, ex_no, error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01002875 unsigned long cr2, rip, dr6;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002876 u32 vect_info;
2877 enum emulation_result er;
2878
Avi Kivity1155f762007-11-22 11:30:47 +02002879 vect_info = vmx->idt_vectoring_info;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002880 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
2881
Andi Kleena0861c02009-06-08 17:37:09 +08002882 if (is_machine_check(intr_info))
Avi Kivity851ba692009-08-24 11:10:17 +03002883 return handle_machine_check(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08002884
Avi Kivity6aa8b732006-12-10 02:21:36 -08002885 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
Avi Kivity65ac7262009-11-04 11:59:01 +02002886 !is_page_fault(intr_info)) {
2887 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2888 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX;
2889 vcpu->run->internal.ndata = 2;
2890 vcpu->run->internal.data[0] = vect_info;
2891 vcpu->run->internal.data[1] = intr_info;
2892 return 0;
2893 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002894
Jan Kiszkae4a41882008-09-26 09:30:46 +02002895 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
Avi Kivity1b6269d2007-10-09 12:12:19 +02002896 return 1; /* already handled by vmx_vcpu_run() */
Anthony Liguori2ab455c2007-04-27 09:29:49 +03002897
2898 if (is_no_device(intr_info)) {
Avi Kivity5fd86fc2007-05-02 20:40:00 +03002899 vmx_fpu_activate(vcpu);
Anthony Liguori2ab455c2007-04-27 09:29:49 +03002900 return 1;
2901 }
2902
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002903 if (is_invalid_opcode(intr_info)) {
Avi Kivity851ba692009-08-24 11:10:17 +03002904 er = emulate_instruction(vcpu, 0, 0, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002905 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02002906 kvm_queue_exception(vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05002907 return 1;
2908 }
2909
Avi Kivity6aa8b732006-12-10 02:21:36 -08002910 error_code = 0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002911 rip = kvm_rip_read(vcpu);
Ryan Harper2e113842008-02-11 10:26:38 -06002912 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002913 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
2914 if (is_page_fault(intr_info)) {
Sheng Yang14394422008-04-28 12:24:45 +08002915 /* EPT won't cause page fault directly */
Avi Kivity089d0342009-03-23 18:26:32 +02002916 if (enable_ept)
Sheng Yang14394422008-04-28 12:24:45 +08002917 BUG();
Avi Kivity6aa8b732006-12-10 02:21:36 -08002918 cr2 = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03002919 trace_kvm_page_fault(cr2, error_code);
2920
Gleb Natapov3298b752009-05-11 13:35:46 +03002921 if (kvm_event_needs_reinjection(vcpu))
Avi Kivity577bdc42008-07-19 08:57:05 +03002922 kvm_mmu_unprotect_page_virt(vcpu, cr2);
Avi Kivity30677142007-10-28 18:48:59 +02002923 return kvm_mmu_page_fault(vcpu, cr2, error_code);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002924 }
2925
Avi Kivity7ffd92c2009-06-09 14:10:45 +03002926 if (vmx->rmode.vm86_active &&
Avi Kivity6aa8b732006-12-10 02:21:36 -08002927 handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
Avi Kivity72d6e5a2007-06-05 16:15:51 +03002928 error_code)) {
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002929 if (vcpu->arch.halt_request) {
2930 vcpu->arch.halt_request = 0;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03002931 return kvm_emulate_halt(vcpu);
2932 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002933 return 1;
Avi Kivity72d6e5a2007-06-05 16:15:51 +03002934 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002935
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002936 ex_no = intr_info & INTR_INFO_VECTOR_MASK;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01002937 switch (ex_no) {
2938 case DB_VECTOR:
2939 dr6 = vmcs_readl(EXIT_QUALIFICATION);
2940 if (!(vcpu->guest_debug &
2941 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
2942 vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
2943 kvm_queue_exception(vcpu, DB_VECTOR);
2944 return 1;
2945 }
2946 kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
2947 kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
2948 /* fall through */
2949 case BP_VECTOR:
Jan Kiszkac573cd22010-02-23 17:47:53 +01002950 /*
2951 * Update instruction length as we may reinject #BP from
2952 * user space while in guest debugging mode. Reading it for
2953 * #DB as well causes no harm, it is not used in that case.
2954 */
2955 vmx->vcpu.arch.event_exit_inst_len =
2956 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002957 kvm_run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002958 kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
2959 kvm_run->debug.arch.exception = ex_no;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01002960 break;
2961 default:
Jan Kiszkad0bfb942008-12-15 13:52:10 +01002962 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
2963 kvm_run->ex.exception = ex_no;
2964 kvm_run->ex.error_code = error_code;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01002965 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002966 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08002967 return 0;
2968}
2969
Avi Kivity851ba692009-08-24 11:10:17 +03002970static int handle_external_interrupt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002971{
Avi Kivity1165f5f2007-04-19 17:27:43 +03002972 ++vcpu->stat.irq_exits;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002973 return 1;
2974}
2975
Avi Kivity851ba692009-08-24 11:10:17 +03002976static int handle_triple_fault(struct kvm_vcpu *vcpu)
Avi Kivity988ad742007-02-12 00:54:36 -08002977{
Avi Kivity851ba692009-08-24 11:10:17 +03002978 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Avi Kivity988ad742007-02-12 00:54:36 -08002979 return 0;
2980}
Avi Kivity6aa8b732006-12-10 02:21:36 -08002981
Avi Kivity851ba692009-08-24 11:10:17 +03002982static int handle_io(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002983{
He, Qingbfdaab02007-09-12 14:18:28 +08002984 unsigned long exit_qualification;
Jan Kiszka34c33d12009-02-08 13:28:15 +01002985 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02002986 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002987
He, Qingbfdaab02007-09-12 14:18:28 +08002988 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity039576c2007-03-20 12:46:50 +02002989 string = (exit_qualification & 16) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03002990 in = (exit_qualification & 8) != 0;
Laurent Viviere70669a2007-08-05 10:36:40 +03002991
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02002992 ++vcpu->stat.io_exits;
2993
2994 if (string || in)
2995 return !(emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DO_MMIO);
2996
2997 port = exit_qualification >> 16;
2998 size = (exit_qualification & 7) + 1;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01002999 skip_emulated_instruction(vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003000
3001 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003002}
3003
Ingo Molnar102d8322007-02-19 14:37:47 +02003004static void
3005vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3006{
3007 /*
3008 * Patch in the VMCALL instruction:
3009 */
3010 hypercall[0] = 0x0f;
3011 hypercall[1] = 0x01;
3012 hypercall[2] = 0xc1;
Ingo Molnar102d8322007-02-19 14:37:47 +02003013}
3014
Avi Kivity851ba692009-08-24 11:10:17 +03003015static int handle_cr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003016{
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003017 unsigned long exit_qualification, val;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003018 int cr;
3019 int reg;
3020
He, Qingbfdaab02007-09-12 14:18:28 +08003021 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003022 cr = exit_qualification & 15;
3023 reg = (exit_qualification >> 8) & 15;
3024 switch ((exit_qualification >> 4) & 3) {
3025 case 0: /* mov to cr */
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003026 val = kvm_register_read(vcpu, reg);
3027 trace_kvm_cr_write(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003028 switch (cr) {
3029 case 0:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003030 kvm_set_cr0(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003031 skip_emulated_instruction(vcpu);
3032 return 1;
3033 case 3:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003034 kvm_set_cr3(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003035 skip_emulated_instruction(vcpu);
3036 return 1;
3037 case 4:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003038 kvm_set_cr4(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003039 skip_emulated_instruction(vcpu);
3040 return 1;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003041 case 8: {
3042 u8 cr8_prev = kvm_get_cr8(vcpu);
3043 u8 cr8 = kvm_register_read(vcpu, reg);
3044 kvm_set_cr8(vcpu, cr8);
3045 skip_emulated_instruction(vcpu);
3046 if (irqchip_in_kernel(vcpu->kvm))
3047 return 1;
3048 if (cr8_prev <= cr8)
3049 return 1;
Avi Kivity851ba692009-08-24 11:10:17 +03003050 vcpu->run->exit_reason = KVM_EXIT_SET_TPR;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003051 return 0;
3052 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003053 };
3054 break;
Anthony Liguori25c4c272007-04-27 09:29:21 +03003055 case 2: /* clts */
Avi Kivityedcafe32009-12-30 18:07:40 +02003056 vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
Avi Kivity4d4ec082009-12-29 18:07:30 +02003057 trace_kvm_cr_write(0, kvm_read_cr0(vcpu));
Anthony Liguori25c4c272007-04-27 09:29:21 +03003058 skip_emulated_instruction(vcpu);
Avi Kivity6b52d182010-01-21 15:31:47 +02003059 vmx_fpu_activate(vcpu);
Anthony Liguori25c4c272007-04-27 09:29:21 +03003060 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003061 case 1: /*mov from cr*/
3062 switch (cr) {
3063 case 3:
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003064 kvm_register_write(vcpu, reg, vcpu->arch.cr3);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003065 trace_kvm_cr_read(cr, vcpu->arch.cr3);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003066 skip_emulated_instruction(vcpu);
3067 return 1;
3068 case 8:
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003069 val = kvm_get_cr8(vcpu);
3070 kvm_register_write(vcpu, reg, val);
3071 trace_kvm_cr_read(cr, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003072 skip_emulated_instruction(vcpu);
3073 return 1;
3074 }
3075 break;
3076 case 3: /* lmsw */
Avi Kivitya1f83a72009-12-29 17:33:58 +02003077 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
Avi Kivity4d4ec082009-12-29 18:07:30 +02003078 trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val);
Avi Kivitya1f83a72009-12-29 17:33:58 +02003079 kvm_lmsw(vcpu, val);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003080
3081 skip_emulated_instruction(vcpu);
3082 return 1;
3083 default:
3084 break;
3085 }
Avi Kivity851ba692009-08-24 11:10:17 +03003086 vcpu->run->exit_reason = 0;
Rusty Russellf0242472007-08-01 10:48:02 +10003087 pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -08003088 (int)(exit_qualification >> 4) & 3, cr);
3089 return 0;
3090}
3091
Avi Kivity851ba692009-08-24 11:10:17 +03003092static int handle_dr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003093{
He, Qingbfdaab02007-09-12 14:18:28 +08003094 unsigned long exit_qualification;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003095 int dr, reg;
3096
Jan Kiszkaf2483412010-01-20 18:20:20 +01003097 /* Do not handle if the CPL > 0, will trigger GP on re-entry */
Avi Kivity0a79b002009-09-01 12:03:25 +03003098 if (!kvm_require_cpl(vcpu, 0))
3099 return 1;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003100 dr = vmcs_readl(GUEST_DR7);
3101 if (dr & DR7_GD) {
3102 /*
3103 * As the vm-exit takes precedence over the debug trap, we
3104 * need to emulate the latter, either for the host or the
3105 * guest debugging itself.
3106 */
3107 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Avi Kivity851ba692009-08-24 11:10:17 +03003108 vcpu->run->debug.arch.dr6 = vcpu->arch.dr6;
3109 vcpu->run->debug.arch.dr7 = dr;
3110 vcpu->run->debug.arch.pc =
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003111 vmcs_readl(GUEST_CS_BASE) +
3112 vmcs_readl(GUEST_RIP);
Avi Kivity851ba692009-08-24 11:10:17 +03003113 vcpu->run->debug.arch.exception = DB_VECTOR;
3114 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003115 return 0;
3116 } else {
3117 vcpu->arch.dr7 &= ~DR7_GD;
3118 vcpu->arch.dr6 |= DR6_BD;
3119 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
3120 kvm_queue_exception(vcpu, DB_VECTOR);
3121 return 1;
3122 }
3123 }
3124
He, Qingbfdaab02007-09-12 14:18:28 +08003125 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003126 dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
3127 reg = DEBUG_REG_ACCESS_REG(exit_qualification);
3128 if (exit_qualification & TYPE_MOV_FROM_DR) {
Gleb Natapov020df072010-04-13 10:05:23 +03003129 unsigned long val;
3130 if (!kvm_get_dr(vcpu, dr, &val))
3131 kvm_register_write(vcpu, reg, val);
3132 } else
3133 kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003134 skip_emulated_instruction(vcpu);
3135 return 1;
3136}
3137
Gleb Natapov020df072010-04-13 10:05:23 +03003138static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
3139{
3140 vmcs_writel(GUEST_DR7, val);
3141}
3142
Avi Kivity851ba692009-08-24 11:10:17 +03003143static int handle_cpuid(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003144{
Avi Kivity06465c52007-02-28 20:46:53 +02003145 kvm_emulate_cpuid(vcpu);
3146 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003147}
3148
Avi Kivity851ba692009-08-24 11:10:17 +03003149static int handle_rdmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003150{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003151 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08003152 u64 data;
3153
3154 if (vmx_get_msr(vcpu, ecx, &data)) {
Avi Kivity59200272010-01-25 19:47:02 +02003155 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003156 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003157 return 1;
3158 }
3159
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003160 trace_kvm_msr_read(ecx, data);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003161
Avi Kivity6aa8b732006-12-10 02:21:36 -08003162 /* FIXME: handling of bits 32:63 of rax, rdx */
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003163 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
3164 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003165 skip_emulated_instruction(vcpu);
3166 return 1;
3167}
3168
Avi Kivity851ba692009-08-24 11:10:17 +03003169static int handle_wrmsr(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003170{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003171 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
3172 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
3173 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003174
3175 if (vmx_set_msr(vcpu, ecx, data) != 0) {
Avi Kivity59200272010-01-25 19:47:02 +02003176 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003177 kvm_inject_gp(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003178 return 1;
3179 }
3180
Avi Kivity59200272010-01-25 19:47:02 +02003181 trace_kvm_msr_write(ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003182 skip_emulated_instruction(vcpu);
3183 return 1;
3184}
3185
Avi Kivity851ba692009-08-24 11:10:17 +03003186static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003187{
3188 return 1;
3189}
3190
Avi Kivity851ba692009-08-24 11:10:17 +03003191static int handle_interrupt_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003192{
Eddie Dong85f455f2007-07-06 12:20:49 +03003193 u32 cpu_based_vm_exec_control;
3194
3195 /* clear pending irq */
3196 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3197 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
3198 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003199
Jan Kiszkaa26bf122008-09-26 09:30:45 +02003200 ++vcpu->stat.irq_window_exits;
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003201
Dor Laorc1150d82007-01-05 16:36:24 -08003202 /*
3203 * If the user space waits to inject interrupts, exit as soon as
3204 * possible
3205 */
Gleb Natapov80618232009-04-21 17:44:56 +03003206 if (!irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03003207 vcpu->run->request_interrupt_window &&
Gleb Natapov80618232009-04-21 17:44:56 +03003208 !kvm_cpu_has_interrupt(vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003209 vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
Dor Laorc1150d82007-01-05 16:36:24 -08003210 return 0;
3211 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003212 return 1;
3213}
3214
Avi Kivity851ba692009-08-24 11:10:17 +03003215static int handle_halt(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003216{
3217 skip_emulated_instruction(vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +03003218 return kvm_emulate_halt(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003219}
3220
Avi Kivity851ba692009-08-24 11:10:17 +03003221static int handle_vmcall(struct kvm_vcpu *vcpu)
Ingo Molnarc21415e2007-02-19 14:37:47 +02003222{
Dor Laor510043d2007-02-19 18:25:43 +02003223 skip_emulated_instruction(vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003224 kvm_emulate_hypercall(vcpu);
3225 return 1;
Ingo Molnarc21415e2007-02-19 14:37:47 +02003226}
3227
Avi Kivity851ba692009-08-24 11:10:17 +03003228static int handle_vmx_insn(struct kvm_vcpu *vcpu)
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003229{
3230 kvm_queue_exception(vcpu, UD_VECTOR);
3231 return 1;
3232}
3233
Avi Kivity851ba692009-08-24 11:10:17 +03003234static int handle_invlpg(struct kvm_vcpu *vcpu)
Marcelo Tosattia7052892008-09-23 13:18:35 -03003235{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003236 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Marcelo Tosattia7052892008-09-23 13:18:35 -03003237
3238 kvm_mmu_invlpg(vcpu, exit_qualification);
3239 skip_emulated_instruction(vcpu);
3240 return 1;
3241}
3242
Avi Kivity851ba692009-08-24 11:10:17 +03003243static int handle_wbinvd(struct kvm_vcpu *vcpu)
Eddie Donge5edaa02007-11-11 12:28:35 +02003244{
3245 skip_emulated_instruction(vcpu);
3246 /* TODO: Add support for VT-d/pass-through device */
3247 return 1;
3248}
3249
Avi Kivity851ba692009-08-24 11:10:17 +03003250static int handle_apic_access(struct kvm_vcpu *vcpu)
Sheng Yangf78e0e22007-10-29 09:40:42 +08003251{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003252 unsigned long exit_qualification;
Sheng Yangf78e0e22007-10-29 09:40:42 +08003253 enum emulation_result er;
3254 unsigned long offset;
3255
Sheng Yangf9c617f2009-03-25 10:08:52 +08003256 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Sheng Yangf78e0e22007-10-29 09:40:42 +08003257 offset = exit_qualification & 0xffful;
3258
Avi Kivity851ba692009-08-24 11:10:17 +03003259 er = emulate_instruction(vcpu, 0, 0, 0);
Sheng Yangf78e0e22007-10-29 09:40:42 +08003260
3261 if (er != EMULATE_DONE) {
3262 printk(KERN_ERR
3263 "Fail to handle apic access vmexit! Offset is 0x%lx\n",
3264 offset);
Jan Kiszka7f582ab2009-07-22 23:53:01 +02003265 return -ENOEXEC;
Sheng Yangf78e0e22007-10-29 09:40:42 +08003266 }
3267 return 1;
3268}
3269
Avi Kivity851ba692009-08-24 11:10:17 +03003270static int handle_task_switch(struct kvm_vcpu *vcpu)
Izik Eidus37817f22008-03-24 23:14:53 +02003271{
Jan Kiszka60637aa2008-09-26 09:30:47 +02003272 struct vcpu_vmx *vmx = to_vmx(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02003273 unsigned long exit_qualification;
Jan Kiszkae269fb22010-04-14 15:51:09 +02003274 bool has_error_code = false;
3275 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02003276 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003277 int reason, type, idt_v;
3278
3279 idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
3280 type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
Izik Eidus37817f22008-03-24 23:14:53 +02003281
3282 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
3283
3284 reason = (u32)exit_qualification >> 30;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003285 if (reason == TASK_SWITCH_GATE && idt_v) {
3286 switch (type) {
3287 case INTR_TYPE_NMI_INTR:
3288 vcpu->arch.nmi_injected = false;
3289 if (cpu_has_virtual_nmis())
3290 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3291 GUEST_INTR_STATE_NMI);
3292 break;
3293 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003294 case INTR_TYPE_SOFT_INTR:
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003295 kvm_clear_interrupt_queue(vcpu);
3296 break;
3297 case INTR_TYPE_HARD_EXCEPTION:
Jan Kiszkae269fb22010-04-14 15:51:09 +02003298 if (vmx->idt_vectoring_info &
3299 VECTORING_INFO_DELIVER_CODE_MASK) {
3300 has_error_code = true;
3301 error_code =
3302 vmcs_read32(IDT_VECTORING_ERROR_CODE);
3303 }
3304 /* fall through */
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003305 case INTR_TYPE_SOFT_EXCEPTION:
3306 kvm_clear_exception_queue(vcpu);
3307 break;
3308 default:
3309 break;
3310 }
Jan Kiszka60637aa2008-09-26 09:30:47 +02003311 }
Izik Eidus37817f22008-03-24 23:14:53 +02003312 tss_selector = exit_qualification;
3313
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003314 if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION &&
3315 type != INTR_TYPE_EXT_INTR &&
3316 type != INTR_TYPE_NMI_INTR))
3317 skip_emulated_instruction(vcpu);
3318
Gleb Natapovacb54512010-04-15 21:03:50 +03003319 if (kvm_task_switch(vcpu, tss_selector, reason,
3320 has_error_code, error_code) == EMULATE_FAIL) {
3321 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3322 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
3323 vcpu->run->internal.ndata = 0;
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003324 return 0;
Gleb Natapovacb54512010-04-15 21:03:50 +03003325 }
Jan Kiszka42dbaa52008-12-15 13:52:10 +01003326
3327 /* clear all local breakpoint enable flags */
3328 vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
3329
3330 /*
3331 * TODO: What about debug traps on tss switch?
3332 * Are we supposed to inject them and update dr6?
3333 */
3334
3335 return 1;
Izik Eidus37817f22008-03-24 23:14:53 +02003336}
3337
Avi Kivity851ba692009-08-24 11:10:17 +03003338static int handle_ept_violation(struct kvm_vcpu *vcpu)
Sheng Yang14394422008-04-28 12:24:45 +08003339{
Sheng Yangf9c617f2009-03-25 10:08:52 +08003340 unsigned long exit_qualification;
Sheng Yang14394422008-04-28 12:24:45 +08003341 gpa_t gpa;
Sheng Yang14394422008-04-28 12:24:45 +08003342 int gla_validity;
Sheng Yang14394422008-04-28 12:24:45 +08003343
Sheng Yangf9c617f2009-03-25 10:08:52 +08003344 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
Sheng Yang14394422008-04-28 12:24:45 +08003345
3346 if (exit_qualification & (1 << 6)) {
3347 printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
Jan Kiszka7f582ab2009-07-22 23:53:01 +02003348 return -EINVAL;
Sheng Yang14394422008-04-28 12:24:45 +08003349 }
3350
3351 gla_validity = (exit_qualification >> 7) & 0x3;
3352 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
3353 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
3354 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
3355 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
Sheng Yangf9c617f2009-03-25 10:08:52 +08003356 vmcs_readl(GUEST_LINEAR_ADDRESS));
Sheng Yang14394422008-04-28 12:24:45 +08003357 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
3358 (long unsigned int)exit_qualification);
Avi Kivity851ba692009-08-24 11:10:17 +03003359 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3360 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION;
Avi Kivity596ae892009-06-03 14:12:10 +03003361 return 0;
Sheng Yang14394422008-04-28 12:24:45 +08003362 }
3363
3364 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003365 trace_kvm_page_fault(gpa, exit_qualification);
Sheng Yang49cd7d22009-02-11 13:50:40 +08003366 return kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
Sheng Yang14394422008-04-28 12:24:45 +08003367}
3368
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003369static u64 ept_rsvd_mask(u64 spte, int level)
3370{
3371 int i;
3372 u64 mask = 0;
3373
3374 for (i = 51; i > boot_cpu_data.x86_phys_bits; i--)
3375 mask |= (1ULL << i);
3376
3377 if (level > 2)
3378 /* bits 7:3 reserved */
3379 mask |= 0xf8;
3380 else if (level == 2) {
3381 if (spte & (1ULL << 7))
3382 /* 2MB ref, bits 20:12 reserved */
3383 mask |= 0x1ff000;
3384 else
3385 /* bits 6:3 reserved */
3386 mask |= 0x78;
3387 }
3388
3389 return mask;
3390}
3391
3392static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte,
3393 int level)
3394{
3395 printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level);
3396
3397 /* 010b (write-only) */
3398 WARN_ON((spte & 0x7) == 0x2);
3399
3400 /* 110b (write/execute) */
3401 WARN_ON((spte & 0x7) == 0x6);
3402
3403 /* 100b (execute-only) and value not supported by logical processor */
3404 if (!cpu_has_vmx_ept_execute_only())
3405 WARN_ON((spte & 0x7) == 0x4);
3406
3407 /* not 000b */
3408 if ((spte & 0x7)) {
3409 u64 rsvd_bits = spte & ept_rsvd_mask(spte, level);
3410
3411 if (rsvd_bits != 0) {
3412 printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n",
3413 __func__, rsvd_bits);
3414 WARN_ON(1);
3415 }
3416
3417 if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) {
3418 u64 ept_mem_type = (spte & 0x38) >> 3;
3419
3420 if (ept_mem_type == 2 || ept_mem_type == 3 ||
3421 ept_mem_type == 7) {
3422 printk(KERN_ERR "%s: ept_mem_type=0x%llx\n",
3423 __func__, ept_mem_type);
3424 WARN_ON(1);
3425 }
3426 }
3427 }
3428}
3429
Avi Kivity851ba692009-08-24 11:10:17 +03003430static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003431{
3432 u64 sptes[4];
3433 int nr_sptes, i;
3434 gpa_t gpa;
3435
3436 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
3437
3438 printk(KERN_ERR "EPT: Misconfiguration.\n");
3439 printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa);
3440
3441 nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes);
3442
3443 for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i)
3444 ept_misconfig_inspect_spte(vcpu, sptes[i-1], i);
3445
Avi Kivity851ba692009-08-24 11:10:17 +03003446 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3447 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003448
3449 return 0;
3450}
3451
Avi Kivity851ba692009-08-24 11:10:17 +03003452static int handle_nmi_window(struct kvm_vcpu *vcpu)
Sheng Yangf08864b2008-05-15 18:23:25 +08003453{
3454 u32 cpu_based_vm_exec_control;
3455
3456 /* clear pending NMI */
3457 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
3458 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
3459 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
3460 ++vcpu->stat.nmi_window_exits;
3461
3462 return 1;
3463}
3464
Mohammed Gamal80ced182009-09-01 12:48:18 +02003465static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003466{
Avi Kivity8b3079a2009-01-05 12:10:54 +02003467 struct vcpu_vmx *vmx = to_vmx(vcpu);
3468 enum emulation_result err = EMULATE_DONE;
Mohammed Gamal80ced182009-09-01 12:48:18 +02003469 int ret = 1;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003470
3471 while (!guest_state_valid(vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003472 err = emulate_instruction(vcpu, 0, 0, 0);
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003473
Mohammed Gamal80ced182009-09-01 12:48:18 +02003474 if (err == EMULATE_DO_MMIO) {
3475 ret = 0;
3476 goto out;
3477 }
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003478
3479 if (err != EMULATE_DONE) {
Mohammed Gamal80ced182009-09-01 12:48:18 +02003480 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
3481 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
Avi Kivitya9c73992009-11-04 11:54:59 +02003482 vcpu->run->internal.ndata = 0;
Mohammed Gamal80ced182009-09-01 12:48:18 +02003483 ret = 0;
3484 goto out;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003485 }
3486
3487 if (signal_pending(current))
Mohammed Gamal80ced182009-09-01 12:48:18 +02003488 goto out;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003489 if (need_resched())
3490 schedule();
3491 }
3492
Mohammed Gamal80ced182009-09-01 12:48:18 +02003493 vmx->emulation_required = 0;
3494out:
3495 return ret;
Mohammed Gamalea953ef2008-08-17 16:47:05 +03003496}
3497
Avi Kivity6aa8b732006-12-10 02:21:36 -08003498/*
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003499 * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE
3500 * exiting, so only get here on cpu with PAUSE-Loop-Exiting.
3501 */
Marcelo Tosatti9fb41ba2009-10-12 19:37:31 -03003502static int handle_pause(struct kvm_vcpu *vcpu)
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003503{
3504 skip_emulated_instruction(vcpu);
3505 kvm_vcpu_on_spin(vcpu);
3506
3507 return 1;
3508}
3509
Sheng Yang59708672009-12-15 13:29:54 +08003510static int handle_invalid_op(struct kvm_vcpu *vcpu)
3511{
3512 kvm_queue_exception(vcpu, UD_VECTOR);
3513 return 1;
3514}
3515
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003516/*
Avi Kivity6aa8b732006-12-10 02:21:36 -08003517 * The exit handlers return 1 if the exit was handled fully and guest execution
3518 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
3519 * to be done to userspace and return 0.
3520 */
Avi Kivity851ba692009-08-24 11:10:17 +03003521static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08003522 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
3523 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
Avi Kivity988ad742007-02-12 00:54:36 -08003524 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
Sheng Yangf08864b2008-05-15 18:23:25 +08003525 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003526 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003527 [EXIT_REASON_CR_ACCESS] = handle_cr,
3528 [EXIT_REASON_DR_ACCESS] = handle_dr,
3529 [EXIT_REASON_CPUID] = handle_cpuid,
3530 [EXIT_REASON_MSR_READ] = handle_rdmsr,
3531 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
3532 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
3533 [EXIT_REASON_HLT] = handle_halt,
Marcelo Tosattia7052892008-09-23 13:18:35 -03003534 [EXIT_REASON_INVLPG] = handle_invlpg,
Ingo Molnarc21415e2007-02-19 14:37:47 +02003535 [EXIT_REASON_VMCALL] = handle_vmcall,
Avi Kivitye3c7cb62009-06-16 14:19:52 +03003536 [EXIT_REASON_VMCLEAR] = handle_vmx_insn,
3537 [EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
3538 [EXIT_REASON_VMPTRLD] = handle_vmx_insn,
3539 [EXIT_REASON_VMPTRST] = handle_vmx_insn,
3540 [EXIT_REASON_VMREAD] = handle_vmx_insn,
3541 [EXIT_REASON_VMRESUME] = handle_vmx_insn,
3542 [EXIT_REASON_VMWRITE] = handle_vmx_insn,
3543 [EXIT_REASON_VMOFF] = handle_vmx_insn,
3544 [EXIT_REASON_VMON] = handle_vmx_insn,
Sheng Yangf78e0e22007-10-29 09:40:42 +08003545 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
3546 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
Eddie Donge5edaa02007-11-11 12:28:35 +02003547 [EXIT_REASON_WBINVD] = handle_wbinvd,
Izik Eidus37817f22008-03-24 23:14:53 +02003548 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
Andi Kleena0861c02009-06-08 17:37:09 +08003549 [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check,
Marcelo Tosatti68f89402009-06-11 12:07:43 -03003550 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
3551 [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig,
Zhai, Edwin4b8d54f2009-10-09 18:03:20 +08003552 [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause,
Sheng Yang59708672009-12-15 13:29:54 +08003553 [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op,
3554 [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003555};
3556
3557static const int kvm_vmx_max_exit_handlers =
Robert P. J. Day50a34852007-06-03 13:35:29 -04003558 ARRAY_SIZE(kvm_vmx_exit_handlers);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003559
3560/*
3561 * The guest has exited. See if we can fix it or if we need userspace
3562 * assistance.
3563 */
Avi Kivity851ba692009-08-24 11:10:17 +03003564static int vmx_handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003565{
Avi Kivity29bd8a72007-09-10 17:27:03 +03003566 struct vcpu_vmx *vmx = to_vmx(vcpu);
Andi Kleena0861c02009-06-08 17:37:09 +08003567 u32 exit_reason = vmx->exit_reason;
Avi Kivity1155f762007-11-22 11:30:47 +02003568 u32 vectoring_info = vmx->idt_vectoring_info;
Avi Kivity29bd8a72007-09-10 17:27:03 +03003569
Avi Kivity5bfd8b52010-03-11 10:50:44 +02003570 trace_kvm_exit(exit_reason, vcpu);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04003571
Mohammed Gamal80ced182009-09-01 12:48:18 +02003572 /* If guest state is invalid, start emulating */
3573 if (vmx->emulation_required && emulate_invalid_guest_state)
3574 return handle_invalid_guest_state(vcpu);
Guillaume Thouvenin1d5a4d92008-10-29 09:39:42 +01003575
Sheng Yang14394422008-04-28 12:24:45 +08003576 /* Access CR3 don't cause VMExit in paging mode, so we need
3577 * to sync with guest real CR3. */
Avi Kivity6de4f3a2009-05-31 22:58:47 +03003578 if (enable_ept && is_paging(vcpu))
Sheng Yang14394422008-04-28 12:24:45 +08003579 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
Sheng Yang14394422008-04-28 12:24:45 +08003580
Avi Kivity29bd8a72007-09-10 17:27:03 +03003581 if (unlikely(vmx->fail)) {
Avi Kivity851ba692009-08-24 11:10:17 +03003582 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3583 vcpu->run->fail_entry.hardware_entry_failure_reason
Avi Kivity29bd8a72007-09-10 17:27:03 +03003584 = vmcs_read32(VM_INSTRUCTION_ERROR);
3585 return 0;
3586 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003587
Mike Dayd77c26f2007-10-08 09:02:08 -04003588 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
Sheng Yang14394422008-04-28 12:24:45 +08003589 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
Jan Kiszka60637aa2008-09-26 09:30:47 +02003590 exit_reason != EXIT_REASON_EPT_VIOLATION &&
3591 exit_reason != EXIT_REASON_TASK_SWITCH))
3592 printk(KERN_WARNING "%s: unexpected, valid vectoring info "
3593 "(0x%x) and exit reason is 0x%x\n",
3594 __func__, vectoring_info, exit_reason);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003595
3596 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) {
Gleb Natapovc4282df2009-04-21 17:45:07 +03003597 if (vmx_interrupt_allowed(vcpu)) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003598 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003599 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
Jan Kiszka45312202008-12-11 16:54:54 +01003600 vcpu->arch.nmi_pending) {
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003601 /*
3602 * This CPU don't support us in finding the end of an
3603 * NMI-blocked window if the guest runs with IRQs
3604 * disabled. So we pull the trigger after 1 s of
3605 * futile waiting, but inform the user about this.
3606 */
3607 printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
3608 "state on VCPU %d after 1 s timeout\n",
3609 __func__, vcpu->vcpu_id);
3610 vmx->soft_vnmi_blocked = 0;
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003611 }
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003612 }
3613
Avi Kivity6aa8b732006-12-10 02:21:36 -08003614 if (exit_reason < kvm_vmx_max_exit_handlers
3615 && kvm_vmx_exit_handlers[exit_reason])
Avi Kivity851ba692009-08-24 11:10:17 +03003616 return kvm_vmx_exit_handlers[exit_reason](vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003617 else {
Avi Kivity851ba692009-08-24 11:10:17 +03003618 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
3619 vcpu->run->hw.hardware_exit_reason = exit_reason;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003620 }
3621 return 0;
3622}
3623
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003624static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003625{
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003626 if (irr == -1 || tpr < irr) {
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003627 vmcs_write32(TPR_THRESHOLD, 0);
3628 return;
3629 }
3630
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003631 vmcs_write32(TPR_THRESHOLD, irr);
Yang, Sheng6e5d8652007-09-12 18:03:11 +08003632}
3633
Avi Kivitycf393f72008-07-01 16:20:21 +03003634static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
3635{
3636 u32 exit_intr_info;
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003637 u32 idt_vectoring_info = vmx->idt_vectoring_info;
Avi Kivitycf393f72008-07-01 16:20:21 +03003638 bool unblock_nmi;
3639 u8 vector;
Avi Kivity668f6122008-07-02 09:28:55 +03003640 int type;
3641 bool idtv_info_valid;
Avi Kivitycf393f72008-07-01 16:20:21 +03003642
3643 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
Gleb Natapov20f65982009-05-11 13:35:55 +03003644
Andi Kleena0861c02009-06-08 17:37:09 +08003645 vmx->exit_reason = vmcs_read32(VM_EXIT_REASON);
3646
3647 /* Handle machine checks before interrupts are enabled */
3648 if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY)
3649 || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI
3650 && is_machine_check(exit_intr_info)))
3651 kvm_machine_check();
3652
Gleb Natapov20f65982009-05-11 13:35:55 +03003653 /* We need to handle NMIs before interrupts are enabled */
3654 if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003655 (exit_intr_info & INTR_INFO_VALID_MASK)) {
3656 kvm_before_handle_nmi(&vmx->vcpu);
Gleb Natapov20f65982009-05-11 13:35:55 +03003657 asm("int $2");
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08003658 kvm_after_handle_nmi(&vmx->vcpu);
3659 }
Gleb Natapov20f65982009-05-11 13:35:55 +03003660
3661 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
3662
Avi Kivitycf393f72008-07-01 16:20:21 +03003663 if (cpu_has_virtual_nmis()) {
3664 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
3665 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
3666 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003667 * SDM 3: 27.7.1.2 (September 2008)
Avi Kivitycf393f72008-07-01 16:20:21 +03003668 * Re-set bit "block by NMI" before VM entry if vmexit caused by
3669 * a guest IRET fault.
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003670 * SDM 3: 23.2.2 (September 2008)
3671 * Bit 12 is undefined in any of the following cases:
3672 * If the VM exit sets the valid bit in the IDT-vectoring
3673 * information field.
3674 * If the VM exit is due to a double fault.
Avi Kivitycf393f72008-07-01 16:20:21 +03003675 */
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003676 if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi &&
3677 vector != DF_VECTOR && !idtv_info_valid)
Avi Kivitycf393f72008-07-01 16:20:21 +03003678 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
3679 GUEST_INTR_STATE_NMI);
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003680 } else if (unlikely(vmx->soft_vnmi_blocked))
3681 vmx->vnmi_blocked_time +=
3682 ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
Avi Kivity668f6122008-07-02 09:28:55 +03003683
Gleb Natapov37b96e92009-03-30 16:03:13 +03003684 vmx->vcpu.arch.nmi_injected = false;
3685 kvm_clear_exception_queue(&vmx->vcpu);
3686 kvm_clear_interrupt_queue(&vmx->vcpu);
3687
3688 if (!idtv_info_valid)
3689 return;
3690
Avi Kivity668f6122008-07-02 09:28:55 +03003691 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
3692 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003693
Gleb Natapov64a7ec02009-03-30 16:03:29 +03003694 switch (type) {
Gleb Natapov37b96e92009-03-30 16:03:13 +03003695 case INTR_TYPE_NMI_INTR:
3696 vmx->vcpu.arch.nmi_injected = true;
Avi Kivity668f6122008-07-02 09:28:55 +03003697 /*
Gleb Natapov7b4a25c2009-03-30 16:03:08 +03003698 * SDM 3: 27.7.1.2 (September 2008)
Gleb Natapov37b96e92009-03-30 16:03:13 +03003699 * Clear bit "block by NMI" before VM entry if a NMI
3700 * delivery faulted.
Avi Kivity668f6122008-07-02 09:28:55 +03003701 */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003702 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
3703 GUEST_INTR_STATE_NMI);
3704 break;
Gleb Natapov37b96e92009-03-30 16:03:13 +03003705 case INTR_TYPE_SOFT_EXCEPTION:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003706 vmx->vcpu.arch.event_exit_inst_len =
3707 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
3708 /* fall through */
3709 case INTR_TYPE_HARD_EXCEPTION:
Avi Kivity35920a32008-07-03 14:50:12 +03003710 if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
Gleb Natapov37b96e92009-03-30 16:03:13 +03003711 u32 err = vmcs_read32(IDT_VECTORING_ERROR_CODE);
3712 kvm_queue_exception_e(&vmx->vcpu, vector, err);
Avi Kivity35920a32008-07-03 14:50:12 +03003713 } else
3714 kvm_queue_exception(&vmx->vcpu, vector);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003715 break;
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003716 case INTR_TYPE_SOFT_INTR:
3717 vmx->vcpu.arch.event_exit_inst_len =
3718 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
3719 /* fall through */
Gleb Natapov37b96e92009-03-30 16:03:13 +03003720 case INTR_TYPE_EXT_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003721 kvm_queue_interrupt(&vmx->vcpu, vector,
3722 type == INTR_TYPE_SOFT_INTR);
Gleb Natapov37b96e92009-03-30 16:03:13 +03003723 break;
3724 default:
3725 break;
Avi Kivityf7d92382008-07-03 16:14:28 +03003726 }
Avi Kivitycf393f72008-07-01 16:20:21 +03003727}
3728
Avi Kivity9c8cba32007-11-22 11:42:59 +02003729/*
3730 * Failure to inject an interrupt should give us the information
3731 * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs
3732 * when fetching the interrupt redirection bitmap in the real-mode
3733 * tss, this doesn't happen. So we do it ourselves.
3734 */
3735static void fixup_rmode_irq(struct vcpu_vmx *vmx)
3736{
3737 vmx->rmode.irq.pending = 0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003738 if (kvm_rip_read(&vmx->vcpu) + 1 != vmx->rmode.irq.rip)
Avi Kivity9c8cba32007-11-22 11:42:59 +02003739 return;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003740 kvm_rip_write(&vmx->vcpu, vmx->rmode.irq.rip);
Avi Kivity9c8cba32007-11-22 11:42:59 +02003741 if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) {
3742 vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK;
3743 vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR;
3744 return;
3745 }
3746 vmx->idt_vectoring_info =
3747 VECTORING_INFO_VALID_MASK
3748 | INTR_TYPE_EXT_INTR
3749 | vmx->rmode.irq.vector;
3750}
3751
Avi Kivityc8019492008-07-14 14:44:59 +03003752#ifdef CONFIG_X86_64
3753#define R "r"
3754#define Q "q"
3755#else
3756#define R "e"
3757#define Q "l"
3758#endif
3759
Avi Kivity851ba692009-08-24 11:10:17 +03003760static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003761{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003762 struct vcpu_vmx *vmx = to_vmx(vcpu);
Avi Kivitye6adf282007-04-30 16:07:54 +03003763
Jan Kiszka3b86cd92008-09-26 09:30:57 +02003764 /* Record the guest's net vcpu time for enforced NMI injections. */
3765 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
3766 vmx->entry_time = ktime_get();
3767
Mohammed Gamal80ced182009-09-01 12:48:18 +02003768 /* Don't enter VMX if guest state is invalid, let the exit handler
3769 start emulation until we arrive back to a valid state */
3770 if (vmx->emulation_required && emulate_invalid_guest_state)
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03003771 return;
Mohammed Gamala89a8fb2008-08-17 16:42:16 +03003772
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003773 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
3774 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
3775 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
3776 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
3777
Gleb Natapov787ff732009-05-18 11:44:06 +03003778 /* When single-stepping over STI and MOV SS, we must clear the
3779 * corresponding interruptibility bits in the guest state. Otherwise
3780 * vmentry fails as it then expects bit 14 (BS) in pending debug
3781 * exceptions being set, but that's not correct for the guest debugging
3782 * case. */
3783 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
3784 vmx_set_interrupt_shadow(vcpu, 0);
3785
Avi Kivitye6adf282007-04-30 16:07:54 +03003786 /*
3787 * Loading guest fpu may have cleared host cr0.ts
3788 */
3789 vmcs_writel(HOST_CR0, read_cr0());
3790
Mike Dayd77c26f2007-10-08 09:02:08 -04003791 asm(
Avi Kivity6aa8b732006-12-10 02:21:36 -08003792 /* Store host registers */
Avi Kivityc8019492008-07-14 14:44:59 +03003793 "push %%"R"dx; push %%"R"bp;"
3794 "push %%"R"cx \n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03003795 "cmp %%"R"sp, %c[host_rsp](%0) \n\t"
3796 "je 1f \n\t"
3797 "mov %%"R"sp, %c[host_rsp](%0) \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003798 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
Avi Kivity313dbd42008-07-17 18:04:30 +03003799 "1: \n\t"
Avi Kivityd3edefc2009-06-16 12:33:56 +03003800 /* Reload cr2 if changed */
3801 "mov %c[cr2](%0), %%"R"ax \n\t"
3802 "mov %%cr2, %%"R"dx \n\t"
3803 "cmp %%"R"ax, %%"R"dx \n\t"
3804 "je 2f \n\t"
3805 "mov %%"R"ax, %%cr2 \n\t"
3806 "2: \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003807 /* Check if vmlaunch of vmresume is needed */
Avi Kivitye08aa782007-11-15 18:06:18 +02003808 "cmpl $0, %c[launched](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003809 /* Load guest registers. Don't clobber flags. */
Avi Kivityc8019492008-07-14 14:44:59 +03003810 "mov %c[rax](%0), %%"R"ax \n\t"
3811 "mov %c[rbx](%0), %%"R"bx \n\t"
3812 "mov %c[rdx](%0), %%"R"dx \n\t"
3813 "mov %c[rsi](%0), %%"R"si \n\t"
3814 "mov %c[rdi](%0), %%"R"di \n\t"
3815 "mov %c[rbp](%0), %%"R"bp \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003816#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02003817 "mov %c[r8](%0), %%r8 \n\t"
3818 "mov %c[r9](%0), %%r9 \n\t"
3819 "mov %c[r10](%0), %%r10 \n\t"
3820 "mov %c[r11](%0), %%r11 \n\t"
3821 "mov %c[r12](%0), %%r12 \n\t"
3822 "mov %c[r13](%0), %%r13 \n\t"
3823 "mov %c[r14](%0), %%r14 \n\t"
3824 "mov %c[r15](%0), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003825#endif
Avi Kivityc8019492008-07-14 14:44:59 +03003826 "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
3827
Avi Kivity6aa8b732006-12-10 02:21:36 -08003828 /* Enter guest mode */
Avi Kivitycd2276a2007-05-14 20:41:13 +03003829 "jne .Llaunched \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003830 __ex(ASM_VMX_VMLAUNCH) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03003831 "jmp .Lkvm_vmx_return \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003832 ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
Avi Kivitycd2276a2007-05-14 20:41:13 +03003833 ".Lkvm_vmx_return: "
Avi Kivity6aa8b732006-12-10 02:21:36 -08003834 /* Save guest registers, load host registers, keep flags */
Avi Kivityc8019492008-07-14 14:44:59 +03003835 "xchg %0, (%%"R"sp) \n\t"
3836 "mov %%"R"ax, %c[rax](%0) \n\t"
3837 "mov %%"R"bx, %c[rbx](%0) \n\t"
3838 "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
3839 "mov %%"R"dx, %c[rdx](%0) \n\t"
3840 "mov %%"R"si, %c[rsi](%0) \n\t"
3841 "mov %%"R"di, %c[rdi](%0) \n\t"
3842 "mov %%"R"bp, %c[rbp](%0) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003843#ifdef CONFIG_X86_64
Avi Kivitye08aa782007-11-15 18:06:18 +02003844 "mov %%r8, %c[r8](%0) \n\t"
3845 "mov %%r9, %c[r9](%0) \n\t"
3846 "mov %%r10, %c[r10](%0) \n\t"
3847 "mov %%r11, %c[r11](%0) \n\t"
3848 "mov %%r12, %c[r12](%0) \n\t"
3849 "mov %%r13, %c[r13](%0) \n\t"
3850 "mov %%r14, %c[r14](%0) \n\t"
3851 "mov %%r15, %c[r15](%0) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003852#endif
Avi Kivityc8019492008-07-14 14:44:59 +03003853 "mov %%cr2, %%"R"ax \n\t"
3854 "mov %%"R"ax, %c[cr2](%0) \n\t"
3855
3856 "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t"
Avi Kivitye08aa782007-11-15 18:06:18 +02003857 "setbe %c[fail](%0) \n\t"
3858 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
3859 [launched]"i"(offsetof(struct vcpu_vmx, launched)),
3860 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
Avi Kivity313dbd42008-07-17 18:04:30 +03003861 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003862 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
3863 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
3864 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
3865 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
3866 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
3867 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
3868 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003869#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003870 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
3871 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
3872 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
3873 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
3874 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
3875 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
3876 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
3877 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
Avi Kivity6aa8b732006-12-10 02:21:36 -08003878#endif
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003879 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
Laurent Vivierc2036302007-10-25 14:18:52 +02003880 : "cc", "memory"
Avi Kivityc8019492008-07-14 14:44:59 +03003881 , R"bx", R"di", R"si"
Laurent Vivierc2036302007-10-25 14:18:52 +02003882#ifdef CONFIG_X86_64
Laurent Vivierc2036302007-10-25 14:18:52 +02003883 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
3884#endif
3885 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08003886
Avi Kivity6de4f3a2009-05-31 22:58:47 +03003887 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
3888 | (1 << VCPU_EXREG_PDPTR));
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003889 vcpu->arch.regs_dirty = 0;
3890
Avi Kivity1155f762007-11-22 11:30:47 +02003891 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
Avi Kivity9c8cba32007-11-22 11:42:59 +02003892 if (vmx->rmode.irq.pending)
3893 fixup_rmode_irq(vmx);
Avi Kivity1155f762007-11-22 11:30:47 +02003894
Mike Dayd77c26f2007-10-08 09:02:08 -04003895 asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
Avi Kivity15ad7142007-07-11 18:17:21 +03003896 vmx->launched = 1;
Avi Kivity1b6269d2007-10-09 12:12:19 +02003897
Avi Kivitycf393f72008-07-01 16:20:21 +03003898 vmx_complete_interrupts(vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003899}
3900
Avi Kivityc8019492008-07-14 14:44:59 +03003901#undef R
3902#undef Q
3903
Avi Kivity6aa8b732006-12-10 02:21:36 -08003904static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
3905{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003906 struct vcpu_vmx *vmx = to_vmx(vcpu);
3907
3908 if (vmx->vmcs) {
Avi Kivity543e4242008-05-13 16:22:47 +03003909 vcpu_clear(vmx);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003910 free_vmcs(vmx->vmcs);
3911 vmx->vmcs = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003912 }
3913}
3914
3915static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
3916{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003917 struct vcpu_vmx *vmx = to_vmx(vcpu);
3918
Sheng Yang2384d2b2008-01-17 15:14:33 +08003919 spin_lock(&vmx_vpid_lock);
3920 if (vmx->vpid != 0)
3921 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
3922 spin_unlock(&vmx_vpid_lock);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003923 vmx_free_vmcs(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003924 kfree(vmx->guest_msrs);
3925 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10003926 kmem_cache_free(kvm_vcpu_cache, vmx);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003927}
3928
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003929static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003930{
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003931 int err;
Rusty Russellc16f8622007-07-30 21:12:19 +10003932 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Avi Kivity15ad7142007-07-11 18:17:21 +03003933 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003934
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003935 if (!vmx)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003936 return ERR_PTR(-ENOMEM);
3937
Sheng Yang2384d2b2008-01-17 15:14:33 +08003938 allocate_vpid(vmx);
3939
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003940 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
3941 if (err)
3942 goto free_vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003943
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003944 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003945 if (!vmx->guest_msrs) {
3946 err = -ENOMEM;
3947 goto uninit_vcpu;
3948 }
Ingo Molnar965b58a2007-01-05 16:36:23 -08003949
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003950 vmx->vmcs = alloc_vmcs();
3951 if (!vmx->vmcs)
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003952 goto free_msrs;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003953
3954 vmcs_clear(vmx->vmcs);
3955
Avi Kivity15ad7142007-07-11 18:17:21 +03003956 cpu = get_cpu();
3957 vmx_vcpu_load(&vmx->vcpu, cpu);
Rusty Russell8b9cf982007-07-30 16:31:43 +10003958 err = vmx_vcpu_setup(vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003959 vmx_vcpu_put(&vmx->vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03003960 put_cpu();
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003961 if (err)
3962 goto free_vmcs;
Marcelo Tosatti5e4a0b32008-02-14 21:21:43 -02003963 if (vm_need_virtualize_apic_accesses(kvm))
3964 if (alloc_apic_access_page(kvm) != 0)
3965 goto free_vmcs;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003966
Sheng Yangb927a3c2009-07-21 10:42:48 +08003967 if (enable_ept) {
3968 if (!kvm->arch.ept_identity_map_addr)
3969 kvm->arch.ept_identity_map_addr =
3970 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003971 if (alloc_identity_pagetable(kvm) != 0)
3972 goto free_vmcs;
Sheng Yangb927a3c2009-07-21 10:42:48 +08003973 }
Sheng Yangb7ebfb02008-04-25 21:44:52 +08003974
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003975 return &vmx->vcpu;
Ingo Molnar965b58a2007-01-05 16:36:23 -08003976
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003977free_vmcs:
3978 free_vmcs(vmx->vmcs);
3979free_msrs:
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003980 kfree(vmx->guest_msrs);
3981uninit_vcpu:
3982 kvm_vcpu_uninit(&vmx->vcpu);
3983free_vcpu:
Rusty Russella4770342007-08-01 14:46:11 +10003984 kmem_cache_free(kvm_vcpu_cache, vmx);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003985 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003986}
3987
Yang, Sheng002c7f72007-07-31 14:23:01 +03003988static void __init vmx_check_processor_compat(void *rtn)
3989{
3990 struct vmcs_config vmcs_conf;
3991
3992 *(int *)rtn = 0;
3993 if (setup_vmcs_config(&vmcs_conf) < 0)
3994 *(int *)rtn = -EIO;
3995 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
3996 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
3997 smp_processor_id());
3998 *(int *)rtn = -EIO;
3999 }
4000}
4001
Sheng Yang67253af2008-04-25 10:20:22 +08004002static int get_ept_level(void)
4003{
4004 return VMX_EPT_DEFAULT_GAW + 1;
4005}
4006
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004007static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08004008{
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004009 u64 ret;
4010
Sheng Yang522c68c2009-04-27 20:35:43 +08004011 /* For VT-d and EPT combination
4012 * 1. MMIO: always map as UC
4013 * 2. EPT with VT-d:
4014 * a. VT-d without snooping control feature: can't guarantee the
4015 * result, try to trust guest.
4016 * b. VT-d with snooping control feature: snooping control feature of
4017 * VT-d engine can guarantee the cache correctness. Just set it
4018 * to WB to keep consistent with host. So the same as item 3.
Sheng Yanga19a6d12010-02-09 16:41:53 +08004019 * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep
Sheng Yang522c68c2009-04-27 20:35:43 +08004020 * consistent with host MTRR
4021 */
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004022 if (is_mmio)
4023 ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang522c68c2009-04-27 20:35:43 +08004024 else if (vcpu->kvm->arch.iommu_domain &&
4025 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
4026 ret = kvm_get_guest_memory_type(vcpu, gfn) <<
4027 VMX_EPT_MT_EPTE_SHIFT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004028 else
Sheng Yang522c68c2009-04-27 20:35:43 +08004029 ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
Sheng Yanga19a6d12010-02-09 16:41:53 +08004030 | VMX_EPT_IPAT_BIT;
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004031
4032 return ret;
Sheng Yang64d4d522008-10-09 16:01:57 +08004033}
4034
Avi Kivityf4c9e872009-12-28 16:06:35 +02004035#define _ER(x) { EXIT_REASON_##x, #x }
4036
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004037static const struct trace_print_flags vmx_exit_reasons_str[] = {
Avi Kivityf4c9e872009-12-28 16:06:35 +02004038 _ER(EXCEPTION_NMI),
4039 _ER(EXTERNAL_INTERRUPT),
4040 _ER(TRIPLE_FAULT),
4041 _ER(PENDING_INTERRUPT),
4042 _ER(NMI_WINDOW),
4043 _ER(TASK_SWITCH),
4044 _ER(CPUID),
4045 _ER(HLT),
4046 _ER(INVLPG),
4047 _ER(RDPMC),
4048 _ER(RDTSC),
4049 _ER(VMCALL),
4050 _ER(VMCLEAR),
4051 _ER(VMLAUNCH),
4052 _ER(VMPTRLD),
4053 _ER(VMPTRST),
4054 _ER(VMREAD),
4055 _ER(VMRESUME),
4056 _ER(VMWRITE),
4057 _ER(VMOFF),
4058 _ER(VMON),
4059 _ER(CR_ACCESS),
4060 _ER(DR_ACCESS),
4061 _ER(IO_INSTRUCTION),
4062 _ER(MSR_READ),
4063 _ER(MSR_WRITE),
4064 _ER(MWAIT_INSTRUCTION),
4065 _ER(MONITOR_INSTRUCTION),
4066 _ER(PAUSE_INSTRUCTION),
4067 _ER(MCE_DURING_VMENTRY),
4068 _ER(TPR_BELOW_THRESHOLD),
4069 _ER(APIC_ACCESS),
4070 _ER(EPT_VIOLATION),
4071 _ER(EPT_MISCONFIG),
4072 _ER(WBINVD),
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004073 { -1, NULL }
4074};
4075
Avi Kivityf4c9e872009-12-28 16:06:35 +02004076#undef _ER
4077
Sheng Yang17cc3932010-01-05 19:02:27 +08004078static int vmx_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02004079{
Sheng Yang878403b2010-01-05 19:02:29 +08004080 if (enable_ept && !cpu_has_vmx_ept_1g_page())
4081 return PT_DIRECTORY_LEVEL;
4082 else
4083 /* For shadow and EPT supported 1GB page */
4084 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02004085}
4086
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004087static inline u32 bit(int bitno)
4088{
4089 return 1 << (bitno & 31);
4090}
4091
Sheng Yang0e851882009-12-18 16:48:46 +08004092static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
4093{
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004094 struct kvm_cpuid_entry2 *best;
4095 struct vcpu_vmx *vmx = to_vmx(vcpu);
4096 u32 exec_control;
4097
4098 vmx->rdtscp_enabled = false;
4099 if (vmx_rdtscp_supported()) {
4100 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
4101 if (exec_control & SECONDARY_EXEC_RDTSCP) {
4102 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
4103 if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
4104 vmx->rdtscp_enabled = true;
4105 else {
4106 exec_control &= ~SECONDARY_EXEC_RDTSCP;
4107 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
4108 exec_control);
4109 }
4110 }
4111 }
Sheng Yang0e851882009-12-18 16:48:46 +08004112}
4113
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03004114static struct kvm_x86_ops vmx_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004115 .cpu_has_kvm_support = cpu_has_kvm_support,
4116 .disabled_by_bios = vmx_disabled_by_bios,
4117 .hardware_setup = hardware_setup,
4118 .hardware_unsetup = hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03004119 .check_processor_compatibility = vmx_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004120 .hardware_enable = hardware_enable,
4121 .hardware_disable = hardware_disable,
Sheng Yang04547152009-04-01 15:52:31 +08004122 .cpu_has_accelerated_tpr = report_flexpriority,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004123
4124 .vcpu_create = vmx_create_vcpu,
4125 .vcpu_free = vmx_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004126 .vcpu_reset = vmx_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004127
Avi Kivity04d2cc72007-09-10 18:10:54 +03004128 .prepare_guest_switch = vmx_save_host_state,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004129 .vcpu_load = vmx_vcpu_load,
4130 .vcpu_put = vmx_vcpu_put,
4131
4132 .set_guest_debug = set_guest_debug,
4133 .get_msr = vmx_get_msr,
4134 .set_msr = vmx_set_msr,
4135 .get_segment_base = vmx_get_segment_base,
4136 .get_segment = vmx_get_segment,
4137 .set_segment = vmx_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02004138 .get_cpl = vmx_get_cpl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004139 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02004140 .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
Anthony Liguori25c4c272007-04-27 09:29:21 +03004141 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004142 .set_cr0 = vmx_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004143 .set_cr3 = vmx_set_cr3,
4144 .set_cr4 = vmx_set_cr4,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004145 .set_efer = vmx_set_efer,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004146 .get_idt = vmx_get_idt,
4147 .set_idt = vmx_set_idt,
4148 .get_gdt = vmx_get_gdt,
4149 .set_gdt = vmx_set_gdt,
Gleb Natapov020df072010-04-13 10:05:23 +03004150 .set_dr7 = vmx_set_dr7,
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03004151 .cache_reg = vmx_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004152 .get_rflags = vmx_get_rflags,
4153 .set_rflags = vmx_set_rflags,
Avi Kivityebcbab42010-02-07 11:56:52 +02004154 .fpu_activate = vmx_fpu_activate,
Avi Kivity02daab22009-12-30 12:40:26 +02004155 .fpu_deactivate = vmx_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004156
4157 .tlb_flush = vmx_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004158
Avi Kivity6aa8b732006-12-10 02:21:36 -08004159 .run = vmx_vcpu_run,
Avi Kivity6062d012009-03-23 17:35:17 +02004160 .handle_exit = vmx_handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004161 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04004162 .set_interrupt_shadow = vmx_set_interrupt_shadow,
4163 .get_interrupt_shadow = vmx_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02004164 .patch_hypercall = vmx_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03004165 .set_irq = vmx_inject_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004166 .set_nmi = vmx_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02004167 .queue_exception = vmx_queue_exception,
Gleb Natapov78646122009-03-23 12:12:11 +02004168 .interrupt_allowed = vmx_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004169 .nmi_allowed = vmx_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01004170 .get_nmi_mask = vmx_get_nmi_mask,
4171 .set_nmi_mask = vmx_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004172 .enable_nmi_window = enable_nmi_window,
4173 .enable_irq_window = enable_irq_window,
4174 .update_cr8_intercept = update_cr8_intercept,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004175
Izik Eiduscbc94022007-10-25 00:29:55 +02004176 .set_tss_addr = vmx_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08004177 .get_tdp_level = get_ept_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004178 .get_mt_mask = vmx_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004179
4180 .exit_reasons_str = vmx_exit_reasons_str,
Sheng Yang17cc3932010-01-05 19:02:27 +08004181 .get_lpage_level = vmx_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08004182
4183 .cpuid_update = vmx_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004184
4185 .rdtscp_supported = vmx_rdtscp_supported,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004186};
4187
4188static int __init vmx_init(void)
4189{
Avi Kivity26bb0982009-09-07 11:14:12 +03004190 int r, i;
4191
4192 rdmsrl_safe(MSR_EFER, &host_efer);
4193
4194 for (i = 0; i < NR_VMX_MSR; ++i)
4195 kvm_define_shared_msr(i, vmx_msr_index[i]);
He, Qingfdef3ad2007-04-30 09:45:24 +03004196
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004197 vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004198 if (!vmx_io_bitmap_a)
4199 return -ENOMEM;
4200
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004201 vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
He, Qingfdef3ad2007-04-30 09:45:24 +03004202 if (!vmx_io_bitmap_b) {
4203 r = -ENOMEM;
4204 goto out;
4205 }
4206
Avi Kivity58972972009-02-24 22:26:47 +02004207 vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
4208 if (!vmx_msr_bitmap_legacy) {
Sheng Yang25c5f222008-03-28 13:18:56 +08004209 r = -ENOMEM;
4210 goto out1;
4211 }
4212
Avi Kivity58972972009-02-24 22:26:47 +02004213 vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
4214 if (!vmx_msr_bitmap_longmode) {
4215 r = -ENOMEM;
4216 goto out2;
4217 }
4218
He, Qingfdef3ad2007-04-30 09:45:24 +03004219 /*
4220 * Allow direct access to the PC debug port (it is often used for I/O
4221 * delays, but the vmexits simply slow things down).
4222 */
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004223 memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
4224 clear_bit(0x80, vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004225
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004226 memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004227
Avi Kivity58972972009-02-24 22:26:47 +02004228 memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
4229 memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
Sheng Yang25c5f222008-03-28 13:18:56 +08004230
Sheng Yang2384d2b2008-01-17 15:14:33 +08004231 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
4232
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004233 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
He, Qingfdef3ad2007-04-30 09:45:24 +03004234 if (r)
Avi Kivity58972972009-02-24 22:26:47 +02004235 goto out3;
Sheng Yang25c5f222008-03-28 13:18:56 +08004236
Avi Kivity58972972009-02-24 22:26:47 +02004237 vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
4238 vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
4239 vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
4240 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
4241 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
4242 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
He, Qingfdef3ad2007-04-30 09:45:24 +03004243
Avi Kivity089d0342009-03-23 18:26:32 +02004244 if (enable_ept) {
Sheng Yang14394422008-04-28 12:24:45 +08004245 bypass_guest_pf = 0;
Sheng Yang5fdbcb92008-07-16 09:25:40 +08004246 kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
Sheng Yang2aaf69d2009-01-21 16:52:16 +08004247 VMX_EPT_WRITABLE_MASK);
Sheng Yang534e38b2008-09-08 15:12:30 +08004248 kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004249 VMX_EPT_EXECUTABLE_MASK);
Sheng Yang5fdbcb92008-07-16 09:25:40 +08004250 kvm_enable_tdp();
4251 } else
4252 kvm_disable_tdp();
Sheng Yang14394422008-04-28 12:24:45 +08004253
Avi Kivityc7addb92007-09-16 18:58:32 +02004254 if (bypass_guest_pf)
4255 kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
4256
He, Qingfdef3ad2007-04-30 09:45:24 +03004257 return 0;
4258
Avi Kivity58972972009-02-24 22:26:47 +02004259out3:
4260 free_page((unsigned long)vmx_msr_bitmap_longmode);
Sheng Yang25c5f222008-03-28 13:18:56 +08004261out2:
Avi Kivity58972972009-02-24 22:26:47 +02004262 free_page((unsigned long)vmx_msr_bitmap_legacy);
He, Qingfdef3ad2007-04-30 09:45:24 +03004263out1:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004264 free_page((unsigned long)vmx_io_bitmap_b);
He, Qingfdef3ad2007-04-30 09:45:24 +03004265out:
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004266 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004267 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08004268}
4269
4270static void __exit vmx_exit(void)
4271{
Avi Kivity58972972009-02-24 22:26:47 +02004272 free_page((unsigned long)vmx_msr_bitmap_legacy);
4273 free_page((unsigned long)vmx_msr_bitmap_longmode);
Avi Kivity3e7c73e2009-02-24 21:46:19 +02004274 free_page((unsigned long)vmx_io_bitmap_b);
4275 free_page((unsigned long)vmx_io_bitmap_a);
He, Qingfdef3ad2007-04-30 09:45:24 +03004276
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004277 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08004278}
4279
4280module_init(vmx_init)
4281module_exit(vmx_exit)