vmx.c 97.2 KB
Newer Older
A
Avi Kivity 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/*
 * Kernel-based Virtual Machine driver for Linux
 *
 * This module enables machines with Intel VT-x extensions to run virtual
 * machines without emulation or binary translation.
 *
 * Copyright (C) 2006 Qumranet, Inc.
 *
 * Authors:
 *   Avi Kivity   <avi@qumranet.com>
 *   Yaniv Kamay  <yaniv@qumranet.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */

18
#include "irq.h"
19
#include "mmu.h"
A
Avi Kivity 已提交
20

21
#include <linux/kvm_host.h>
A
Avi Kivity 已提交
22
#include <linux/module.h>
23
#include <linux/kernel.h>
A
Avi Kivity 已提交
24 25
#include <linux/mm.h>
#include <linux/highmem.h>
A
Alexey Dobriyan 已提交
26
#include <linux/sched.h>
27
#include <linux/moduleparam.h>
28
#include "kvm_cache_regs.h"
29
#include "x86.h"
A
Avi Kivity 已提交
30

A
Avi Kivity 已提交
31
#include <asm/io.h>
A
Anthony Liguori 已提交
32
#include <asm/desc.h>
33
#include <asm/vmx.h>
34
#include <asm/virtext.h>
A
Avi Kivity 已提交
35

36 37
#define __ex(x) __kvm_handle_fault_on_reboot(x)

A
Avi Kivity 已提交
38 39 40
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");

41 42 43
static int bypass_guest_pf = 1;
module_param(bypass_guest_pf, bool, 0);

44 45 46
static int enable_vpid = 1;
module_param(enable_vpid, bool, 0);

47 48 49
static int flexpriority_enabled = 1;
module_param(flexpriority_enabled, bool, 0);

50
static int enable_ept = 1;
S
Sheng Yang 已提交
51 52
module_param(enable_ept, bool, 0);

53 54 55
static int emulate_invalid_guest_state = 0;
module_param(emulate_invalid_guest_state, bool, 0);

56 57 58 59 60 61 62
struct vmcs {
	u32 revision_id;
	u32 abort;
	char data[0];
};

struct vcpu_vmx {
R
Rusty Russell 已提交
63
	struct kvm_vcpu       vcpu;
64
	struct list_head      local_vcpus_link;
65
	unsigned long         host_rsp;
66
	int                   launched;
67
	u8                    fail;
68
	u32                   idt_vectoring_info;
69 70 71 72 73 74 75 76 77 78 79 80
	struct kvm_msr_entry *guest_msrs;
	struct kvm_msr_entry *host_msrs;
	int                   nmsrs;
	int                   save_nmsrs;
	int                   msr_offset_efer;
#ifdef CONFIG_X86_64
	int                   msr_offset_kernel_gs_base;
#endif
	struct vmcs          *vmcs;
	struct {
		int           loaded;
		u16           fs_sel, gs_sel, ldt_sel;
81 82
		int           gs_ldt_reload_needed;
		int           fs_reload_needed;
83
		int           guest_efer_loaded;
M
Mike Day 已提交
84
	} host_state;
85 86 87 88 89 90 91
	struct {
		struct {
			bool pending;
			u8 vector;
			unsigned rip;
		} irq;
	} rmode;
92
	int vpid;
93
	bool emulation_required;
94 95 96 97 98

	/* Support for vnmi-less CPUs */
	int soft_vnmi_blocked;
	ktime_t entry_time;
	s64 vnmi_blocked_time;
99 100 101 102
};

static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
{
R
Rusty Russell 已提交
103
	return container_of(vcpu, struct vcpu_vmx, vcpu);
104 105
}

106
static int init_rmode(struct kvm *kvm);
107
static u64 construct_eptp(unsigned long root_hpa);
108

A
Avi Kivity 已提交
109 110
static DEFINE_PER_CPU(struct vmcs *, vmxarea);
static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
111
static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
A
Avi Kivity 已提交
112

113 114
static struct page *vmx_io_bitmap_a;
static struct page *vmx_io_bitmap_b;
S
Sheng Yang 已提交
115
static struct page *vmx_msr_bitmap;
116

117 118 119
static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
static DEFINE_SPINLOCK(vmx_vpid_lock);

120
static struct vmcs_config {
A
Avi Kivity 已提交
121 122 123
	int size;
	int order;
	u32 revision_id;
124 125
	u32 pin_based_exec_ctrl;
	u32 cpu_based_exec_ctrl;
126
	u32 cpu_based_2nd_exec_ctrl;
127 128 129
	u32 vmexit_ctrl;
	u32 vmentry_ctrl;
} vmcs_config;
A
Avi Kivity 已提交
130

H
Hannes Eder 已提交
131
static struct vmx_capability {
S
Sheng Yang 已提交
132 133 134 135
	u32 ept;
	u32 vpid;
} vmx_capability;

A
Avi Kivity 已提交
136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159
#define VMX_SEGMENT_FIELD(seg)					\
	[VCPU_SREG_##seg] = {                                   \
		.selector = GUEST_##seg##_SELECTOR,		\
		.base = GUEST_##seg##_BASE,		   	\
		.limit = GUEST_##seg##_LIMIT,		   	\
		.ar_bytes = GUEST_##seg##_AR_BYTES,	   	\
	}

static struct kvm_vmx_segment_field {
	unsigned selector;
	unsigned base;
	unsigned limit;
	unsigned ar_bytes;
} kvm_vmx_segment_fields[] = {
	VMX_SEGMENT_FIELD(CS),
	VMX_SEGMENT_FIELD(DS),
	VMX_SEGMENT_FIELD(ES),
	VMX_SEGMENT_FIELD(FS),
	VMX_SEGMENT_FIELD(GS),
	VMX_SEGMENT_FIELD(SS),
	VMX_SEGMENT_FIELD(TR),
	VMX_SEGMENT_FIELD(LDTR),
};

160 161 162 163
/*
 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
 * away by decrementing the array size.
 */
A
Avi Kivity 已提交
164
static const u32 vmx_msr_index[] = {
165
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
166 167 168 169
	MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE,
#endif
	MSR_EFER, MSR_K6_STAR,
};
170
#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
A
Avi Kivity 已提交
171

172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
static void load_msrs(struct kvm_msr_entry *e, int n)
{
	int i;

	for (i = 0; i < n; ++i)
		wrmsrl(e[i].index, e[i].data);
}

static void save_msrs(struct kvm_msr_entry *e, int n)
{
	int i;

	for (i = 0; i < n; ++i)
		rdmsrl(e[i].index, e[i].data);
}

A
Avi Kivity 已提交
188 189 190 191
static inline int is_page_fault(u32 intr_info)
{
	return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
			     INTR_INFO_VALID_MASK)) ==
192
		(INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
A
Avi Kivity 已提交
193 194
}

195 196 197 198
static inline int is_no_device(u32 intr_info)
{
	return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
			     INTR_INFO_VALID_MASK)) ==
199
		(INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
200 201
}

202 203 204 205
static inline int is_invalid_opcode(u32 intr_info)
{
	return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
			     INTR_INFO_VALID_MASK)) ==
206
		(INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
207 208
}

A
Avi Kivity 已提交
209 210 211 212 213 214
static inline int is_external_interrupt(u32 intr_info)
{
	return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
		== (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
}

S
Sheng Yang 已提交
215 216 217 218 219
static inline int cpu_has_vmx_msr_bitmap(void)
{
	return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS);
}

220 221 222 223 224 225 226 227 228 229
static inline int cpu_has_vmx_tpr_shadow(void)
{
	return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW);
}

static inline int vm_need_tpr_shadow(struct kvm *kvm)
{
	return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)));
}

230 231 232 233 234 235
static inline int cpu_has_secondary_exec_ctrls(void)
{
	return (vmcs_config.cpu_based_exec_ctrl &
		CPU_BASED_ACTIVATE_SECONDARY_CONTROLS);
}

236
static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
237
{
238 239 240
	return flexpriority_enabled
		&& (vmcs_config.cpu_based_2nd_exec_ctrl &
		    SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
241 242
}

S
Sheng Yang 已提交
243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268
static inline int cpu_has_vmx_invept_individual_addr(void)
{
	return (!!(vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT));
}

static inline int cpu_has_vmx_invept_context(void)
{
	return (!!(vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT));
}

static inline int cpu_has_vmx_invept_global(void)
{
	return (!!(vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT));
}

static inline int cpu_has_vmx_ept(void)
{
	return (vmcs_config.cpu_based_2nd_exec_ctrl &
		SECONDARY_EXEC_ENABLE_EPT);
}

static inline int vm_need_ept(void)
{
	return (cpu_has_vmx_ept() && enable_ept);
}

269 270 271 272 273 274
static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
{
	return ((cpu_has_vmx_virtualize_apic_accesses()) &&
		(irqchip_in_kernel(kvm)));
}

275 276 277 278 279 280
static inline int cpu_has_vmx_vpid(void)
{
	return (vmcs_config.cpu_based_2nd_exec_ctrl &
		SECONDARY_EXEC_ENABLE_VPID);
}

281 282 283 284 285
static inline int cpu_has_virtual_nmis(void)
{
	return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
}

R
Rusty Russell 已提交
286
static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
287 288 289
{
	int i;

290 291
	for (i = 0; i < vmx->nmsrs; ++i)
		if (vmx->guest_msrs[i].index == msr)
292 293 294 295
			return i;
	return -1;
}

296 297 298 299 300 301 302 303
static inline void __invvpid(int ext, u16 vpid, gva_t gva)
{
    struct {
	u64 vpid : 16;
	u64 rsvd : 48;
	u64 gva;
    } operand = { vpid, 0, gva };

304
    asm volatile (__ex(ASM_VMX_INVVPID)
305 306 307 308 309
		  /* CF==1 or ZF==1 --> rc = -1 */
		  "; ja 1f ; ud2 ; 1:"
		  : : "a"(&operand), "c"(ext) : "cc", "memory");
}

310 311 312 313 314 315
static inline void __invept(int ext, u64 eptp, gpa_t gpa)
{
	struct {
		u64 eptp, gpa;
	} operand = {eptp, gpa};

316
	asm volatile (__ex(ASM_VMX_INVEPT)
317 318 319 320 321
			/* CF==1 or ZF==1 --> rc = -1 */
			"; ja 1f ; ud2 ; 1:\n"
			: : "a" (&operand), "c" (ext) : "cc", "memory");
}

R
Rusty Russell 已提交
322
static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
323 324 325
{
	int i;

R
Rusty Russell 已提交
326
	i = __find_msr_index(vmx, msr);
327
	if (i >= 0)
328
		return &vmx->guest_msrs[i];
A
Al Viro 已提交
329
	return NULL;
330 331
}

A
Avi Kivity 已提交
332 333 334 335 336
static void vmcs_clear(struct vmcs *vmcs)
{
	u64 phys_addr = __pa(vmcs);
	u8 error;

337
	asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
A
Avi Kivity 已提交
338 339 340 341 342 343 344 345 346
		      : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
		      : "cc", "memory");
	if (error)
		printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
		       vmcs, phys_addr);
}

static void __vcpu_clear(void *arg)
{
R
Rusty Russell 已提交
347
	struct vcpu_vmx *vmx = arg;
348
	int cpu = raw_smp_processor_id();
A
Avi Kivity 已提交
349

R
Rusty Russell 已提交
350
	if (vmx->vcpu.cpu == cpu)
351 352
		vmcs_clear(vmx->vmcs);
	if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
A
Avi Kivity 已提交
353
		per_cpu(current_vmcs, cpu) = NULL;
354
	rdtscll(vmx->vcpu.arch.host_tsc);
355 356 357
	list_del(&vmx->local_vcpus_link);
	vmx->vcpu.cpu = -1;
	vmx->launched = 0;
A
Avi Kivity 已提交
358 359
}

R
Rusty Russell 已提交
360
static void vcpu_clear(struct vcpu_vmx *vmx)
A
Avi Kivity 已提交
361
{
362 363
	if (vmx->vcpu.cpu == -1)
		return;
364
	smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
A
Avi Kivity 已提交
365 366
}

367 368 369 370 371 372 373 374
static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx)
{
	if (vmx->vpid == 0)
		return;

	__invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
}

375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401
static inline void ept_sync_global(void)
{
	if (cpu_has_vmx_invept_global())
		__invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
}

static inline void ept_sync_context(u64 eptp)
{
	if (vm_need_ept()) {
		if (cpu_has_vmx_invept_context())
			__invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
		else
			ept_sync_global();
	}
}

static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
{
	if (vm_need_ept()) {
		if (cpu_has_vmx_invept_individual_addr())
			__invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR,
					eptp, gpa);
		else
			ept_sync_context(eptp);
	}
}

A
Avi Kivity 已提交
402 403 404 405
static unsigned long vmcs_readl(unsigned long field)
{
	unsigned long value;

406
	asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
A
Avi Kivity 已提交
407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422
		      : "=a"(value) : "d"(field) : "cc");
	return value;
}

static u16 vmcs_read16(unsigned long field)
{
	return vmcs_readl(field);
}

static u32 vmcs_read32(unsigned long field)
{
	return vmcs_readl(field);
}

static u64 vmcs_read64(unsigned long field)
{
423
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
424 425 426 427 428 429
	return vmcs_readl(field);
#else
	return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
#endif
}

430 431 432 433 434 435 436
static noinline void vmwrite_error(unsigned long field, unsigned long value)
{
	printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
	       field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
	dump_stack();
}

A
Avi Kivity 已提交
437 438 439 440
static void vmcs_writel(unsigned long field, unsigned long value)
{
	u8 error;

441
	asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
M
Mike Day 已提交
442
		       : "=q"(error) : "a"(value), "d"(field) : "cc");
443 444
	if (unlikely(error))
		vmwrite_error(field, value);
A
Avi Kivity 已提交
445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
}

static void vmcs_write16(unsigned long field, u16 value)
{
	vmcs_writel(field, value);
}

static void vmcs_write32(unsigned long field, u32 value)
{
	vmcs_writel(field, value);
}

static void vmcs_write64(unsigned long field, u64 value)
{
	vmcs_writel(field, value);
460
#ifndef CONFIG_X86_64
A
Avi Kivity 已提交
461 462 463 464 465
	asm volatile ("");
	vmcs_writel(field+1, value >> 32);
#endif
}

466 467 468 469 470 471 472 473 474 475
static void vmcs_clear_bits(unsigned long field, u32 mask)
{
	vmcs_writel(field, vmcs_readl(field) & ~mask);
}

static void vmcs_set_bits(unsigned long field, u32 mask)
{
	vmcs_writel(field, vmcs_readl(field) | mask);
}

476 477 478 479
static void update_exception_bitmap(struct kvm_vcpu *vcpu)
{
	u32 eb;

480
	eb = (1u << PF_VECTOR) | (1u << UD_VECTOR);
481 482
	if (!vcpu->fpu_active)
		eb |= 1u << NM_VECTOR;
J
Jan Kiszka 已提交
483 484 485 486 487 488 489
	if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
		if (vcpu->guest_debug &
		    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
			eb |= 1u << DB_VECTOR;
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
			eb |= 1u << BP_VECTOR;
	}
490
	if (vcpu->arch.rmode.active)
491
		eb = ~0;
492 493
	if (vm_need_ept())
		eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
494 495 496
	vmcs_write32(EXCEPTION_BITMAP, eb);
}

497 498 499 500 501 502
static void reload_tss(void)
{
	/*
	 * VT restores TR but not its size.  Useless.
	 */
	struct descriptor_table gdt;
503
	struct desc_struct *descs;
504

505
	kvm_get_gdt(&gdt);
506 507 508 509 510
	descs = (void *)gdt.base;
	descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
	load_TR_desc();
}

R
Rusty Russell 已提交
511
static void load_transition_efer(struct vcpu_vmx *vmx)
512
{
513
	int efer_offset = vmx->msr_offset_efer;
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532
	u64 host_efer = vmx->host_msrs[efer_offset].data;
	u64 guest_efer = vmx->guest_msrs[efer_offset].data;
	u64 ignore_bits;

	if (efer_offset < 0)
		return;
	/*
	 * NX is emulated; LMA and LME handled by hardware; SCE meaninless
	 * outside long mode
	 */
	ignore_bits = EFER_NX | EFER_SCE;
#ifdef CONFIG_X86_64
	ignore_bits |= EFER_LMA | EFER_LME;
	/* SCE is meaningful only in long mode on Intel */
	if (guest_efer & EFER_LMA)
		ignore_bits &= ~(u64)EFER_SCE;
#endif
	if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits))
		return;
533

534 535 536 537
	vmx->host_state.guest_efer_loaded = 1;
	guest_efer &= ~ignore_bits;
	guest_efer |= host_efer & ignore_bits;
	wrmsrl(MSR_EFER, guest_efer);
R
Rusty Russell 已提交
538
	vmx->vcpu.stat.efer_reload++;
539 540
}

541 542 543 544 545 546 547 548
static void reload_host_efer(struct vcpu_vmx *vmx)
{
	if (vmx->host_state.guest_efer_loaded) {
		vmx->host_state.guest_efer_loaded = 0;
		load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1);
	}
}

549
static void vmx_save_host_state(struct kvm_vcpu *vcpu)
550
{
551 552
	struct vcpu_vmx *vmx = to_vmx(vcpu);

553
	if (vmx->host_state.loaded)
554 555
		return;

556
	vmx->host_state.loaded = 1;
557 558 559 560
	/*
	 * Set host fs and gs selectors.  Unfortunately, 22.2.3 does not
	 * allow segment selectors with cpl > 0 or ti == 1.
	 */
561
	vmx->host_state.ldt_sel = kvm_read_ldt();
562
	vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
563
	vmx->host_state.fs_sel = kvm_read_fs();
564
	if (!(vmx->host_state.fs_sel & 7)) {
565
		vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
566 567
		vmx->host_state.fs_reload_needed = 0;
	} else {
568
		vmcs_write16(HOST_FS_SELECTOR, 0);
569
		vmx->host_state.fs_reload_needed = 1;
570
	}
571
	vmx->host_state.gs_sel = kvm_read_gs();
572 573
	if (!(vmx->host_state.gs_sel & 7))
		vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
574 575
	else {
		vmcs_write16(HOST_GS_SELECTOR, 0);
576
		vmx->host_state.gs_ldt_reload_needed = 1;
577 578 579 580 581 582
	}

#ifdef CONFIG_X86_64
	vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
	vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
#else
583 584
	vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
	vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
585
#endif
586 587

#ifdef CONFIG_X86_64
M
Mike Day 已提交
588
	if (is_long_mode(&vmx->vcpu))
589 590
		save_msrs(vmx->host_msrs +
			  vmx->msr_offset_kernel_gs_base, 1);
M
Mike Day 已提交
591

592
#endif
593
	load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
594
	load_transition_efer(vmx);
595 596
}

597
static void __vmx_load_host_state(struct vcpu_vmx *vmx)
598
{
599
	unsigned long flags;
600

601
	if (!vmx->host_state.loaded)
602 603
		return;

604
	++vmx->vcpu.stat.host_state_reload;
605
	vmx->host_state.loaded = 0;
606
	if (vmx->host_state.fs_reload_needed)
607
		kvm_load_fs(vmx->host_state.fs_sel);
608
	if (vmx->host_state.gs_ldt_reload_needed) {
609
		kvm_load_ldt(vmx->host_state.ldt_sel);
610 611 612 613
		/*
		 * If we have to reload gs, we must take care to
		 * preserve our gs base.
		 */
614
		local_irq_save(flags);
615
		kvm_load_gs(vmx->host_state.gs_sel);
616 617 618
#ifdef CONFIG_X86_64
		wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
#endif
619
		local_irq_restore(flags);
620
	}
621
	reload_tss();
622 623
	save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
	load_msrs(vmx->host_msrs, vmx->save_nmsrs);
624
	reload_host_efer(vmx);
625 626
}

627 628 629 630 631 632 633
static void vmx_load_host_state(struct vcpu_vmx *vmx)
{
	preempt_disable();
	__vmx_load_host_state(vmx);
	preempt_enable();
}

A
Avi Kivity 已提交
634 635 636 637
/*
 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
 * vcpu mutex is already taken.
 */
638
static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
A
Avi Kivity 已提交
639
{
640 641
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	u64 phys_addr = __pa(vmx->vmcs);
642
	u64 tsc_this, delta, new_offset;
A
Avi Kivity 已提交
643

644
	if (vcpu->cpu != cpu) {
R
Rusty Russell 已提交
645
		vcpu_clear(vmx);
M
Marcelo Tosatti 已提交
646
		kvm_migrate_timers(vcpu);
647
		vpid_sync_vcpu_all(vmx);
648 649 650 651
		local_irq_disable();
		list_add(&vmx->local_vcpus_link,
			 &per_cpu(vcpus_on_cpu, cpu));
		local_irq_enable();
652
	}
A
Avi Kivity 已提交
653

654
	if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
A
Avi Kivity 已提交
655 656
		u8 error;

657
		per_cpu(current_vmcs, cpu) = vmx->vmcs;
658
		asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
A
Avi Kivity 已提交
659 660 661 662
			      : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
			      : "cc");
		if (error)
			printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
663
			       vmx->vmcs, phys_addr);
A
Avi Kivity 已提交
664 665 666 667 668 669 670 671 672 673 674
	}

	if (vcpu->cpu != cpu) {
		struct descriptor_table dt;
		unsigned long sysenter_esp;

		vcpu->cpu = cpu;
		/*
		 * Linux uses per-cpu TSS and GDT, so set these when switching
		 * processors.
		 */
675 676
		vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
		kvm_get_gdt(&dt);
A
Avi Kivity 已提交
677 678 679 680
		vmcs_writel(HOST_GDTR_BASE, dt.base);   /* 22.2.4 */

		rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
		vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
681 682 683 684 685

		/*
		 * Make sure the time stamp counter is monotonous.
		 */
		rdtscll(tsc_this);
686 687 688 689 690
		if (tsc_this < vcpu->arch.host_tsc) {
			delta = vcpu->arch.host_tsc - tsc_this;
			new_offset = vmcs_read64(TSC_OFFSET) + delta;
			vmcs_write64(TSC_OFFSET, new_offset);
		}
A
Avi Kivity 已提交
691 692 693 694 695
	}
}

static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
{
696
	__vmx_load_host_state(to_vmx(vcpu));
A
Avi Kivity 已提交
697 698
}

699 700 701 702 703
static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
{
	if (vcpu->fpu_active)
		return;
	vcpu->fpu_active = 1;
704
	vmcs_clear_bits(GUEST_CR0, X86_CR0_TS);
705
	if (vcpu->arch.cr0 & X86_CR0_TS)
706
		vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
707 708 709 710 711 712 713 714
	update_exception_bitmap(vcpu);
}

static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
{
	if (!vcpu->fpu_active)
		return;
	vcpu->fpu_active = 0;
715
	vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
716 717 718
	update_exception_bitmap(vcpu);
}

A
Avi Kivity 已提交
719 720 721 722 723 724 725
static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
{
	return vmcs_readl(GUEST_RFLAGS);
}

static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
726
	if (vcpu->arch.rmode.active)
727
		rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
A
Avi Kivity 已提交
728 729 730 731 732 733 734 735
	vmcs_writel(GUEST_RFLAGS, rflags);
}

static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
	unsigned long rip;
	u32 interruptibility;

736
	rip = kvm_rip_read(vcpu);
A
Avi Kivity 已提交
737
	rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
738
	kvm_rip_write(vcpu, rip);
A
Avi Kivity 已提交
739 740 741 742 743 744 745 746 747

	/*
	 * We emulated an instruction, so temporary interrupt blocking
	 * should be removed, if set.
	 */
	interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
	if (interruptibility & 3)
		vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
			     interruptibility & ~3);
748
	vcpu->arch.interrupt_window_open = 1;
A
Avi Kivity 已提交
749 750
}

751 752 753
static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
				bool has_error_code, u32 error_code)
{
754
	struct vcpu_vmx *vmx = to_vmx(vcpu);
755
	u32 intr_info = nr | INTR_INFO_VALID_MASK;
756

757
	if (has_error_code) {
758
		vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
759 760
		intr_info |= INTR_INFO_DELIVER_CODE_MASK;
	}
761 762 763 764 765

	if (vcpu->arch.rmode.active) {
		vmx->rmode.irq.pending = true;
		vmx->rmode.irq.vector = nr;
		vmx->rmode.irq.rip = kvm_rip_read(vcpu);
766
		if (nr == BP_VECTOR || nr == OF_VECTOR)
767
			vmx->rmode.irq.rip++;
768 769
		intr_info |= INTR_TYPE_SOFT_INTR;
		vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
770 771 772 773 774
		vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
		kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
		return;
	}

775 776 777 778 779 780 781
	if (nr == BP_VECTOR || nr == OF_VECTOR) {
		vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
		intr_info |= INTR_TYPE_SOFT_EXCEPTION;
	} else
		intr_info |= INTR_TYPE_HARD_EXCEPTION;

	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
782 783 784 785
}

static bool vmx_exception_injected(struct kvm_vcpu *vcpu)
{
786
	return false;
787 788
}

789 790 791
/*
 * Swap MSR entry in host/guest MSR entry array.
 */
792
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
793
static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
794
{
795 796 797 798 799 800 801 802
	struct kvm_msr_entry tmp;

	tmp = vmx->guest_msrs[to];
	vmx->guest_msrs[to] = vmx->guest_msrs[from];
	vmx->guest_msrs[from] = tmp;
	tmp = vmx->host_msrs[to];
	vmx->host_msrs[to] = vmx->host_msrs[from];
	vmx->host_msrs[from] = tmp;
803
}
804
#endif
805

806 807 808 809 810
/*
 * Set up the vmcs to automatically save and restore system
 * msrs.  Don't touch the 64-bit msrs if the guest is in legacy
 * mode, as fiddling with msrs is very expensive.
 */
R
Rusty Russell 已提交
811
static void setup_msrs(struct vcpu_vmx *vmx)
812
{
813
	int save_nmsrs;
814

815
	vmx_load_host_state(vmx);
816 817
	save_nmsrs = 0;
#ifdef CONFIG_X86_64
R
Rusty Russell 已提交
818
	if (is_long_mode(&vmx->vcpu)) {
819 820
		int index;

R
Rusty Russell 已提交
821
		index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
822
		if (index >= 0)
R
Rusty Russell 已提交
823 824
			move_msr_up(vmx, index, save_nmsrs++);
		index = __find_msr_index(vmx, MSR_LSTAR);
825
		if (index >= 0)
R
Rusty Russell 已提交
826 827
			move_msr_up(vmx, index, save_nmsrs++);
		index = __find_msr_index(vmx, MSR_CSTAR);
828
		if (index >= 0)
R
Rusty Russell 已提交
829 830
			move_msr_up(vmx, index, save_nmsrs++);
		index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
831
		if (index >= 0)
R
Rusty Russell 已提交
832
			move_msr_up(vmx, index, save_nmsrs++);
833 834 835 836
		/*
		 * MSR_K6_STAR is only needed on long mode guests, and only
		 * if efer.sce is enabled.
		 */
R
Rusty Russell 已提交
837
		index = __find_msr_index(vmx, MSR_K6_STAR);
838
		if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE))
R
Rusty Russell 已提交
839
			move_msr_up(vmx, index, save_nmsrs++);
840 841
	}
#endif
842
	vmx->save_nmsrs = save_nmsrs;
843

844
#ifdef CONFIG_X86_64
845
	vmx->msr_offset_kernel_gs_base =
R
Rusty Russell 已提交
846
		__find_msr_index(vmx, MSR_KERNEL_GS_BASE);
847
#endif
R
Rusty Russell 已提交
848
	vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER);
849 850
}

A
Avi Kivity 已提交
851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867
/*
 * reads and returns guest's timestamp counter "register"
 * guest_tsc = host_tsc + tsc_offset    -- 21.3
 */
static u64 guest_read_tsc(void)
{
	u64 host_tsc, tsc_offset;

	rdtscll(host_tsc);
	tsc_offset = vmcs_read64(TSC_OFFSET);
	return host_tsc + tsc_offset;
}

/*
 * writes 'guest_tsc' into guest's timestamp counter "register"
 * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
 */
868
static void guest_write_tsc(u64 guest_tsc, u64 host_tsc)
A
Avi Kivity 已提交
869 870 871 872 873 874 875 876 877 878 879 880
{
	vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc);
}

/*
 * Reads an msr value (of 'msr_index') into 'pdata'.
 * Returns 0 on success, non-0 otherwise.
 * Assumes vcpu_load() was already called.
 */
static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
{
	u64 data;
881
	struct kvm_msr_entry *msr;
A
Avi Kivity 已提交
882 883 884 885 886 887 888

	if (!pdata) {
		printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
		return -EINVAL;
	}

	switch (msr_index) {
889
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
890 891 892 893 894 895 896
	case MSR_FS_BASE:
		data = vmcs_readl(GUEST_FS_BASE);
		break;
	case MSR_GS_BASE:
		data = vmcs_readl(GUEST_GS_BASE);
		break;
	case MSR_EFER:
897
		return kvm_get_msr_common(vcpu, msr_index, pdata);
A
Avi Kivity 已提交
898 899 900 901 902 903 904 905
#endif
	case MSR_IA32_TIME_STAMP_COUNTER:
		data = guest_read_tsc();
		break;
	case MSR_IA32_SYSENTER_CS:
		data = vmcs_read32(GUEST_SYSENTER_CS);
		break;
	case MSR_IA32_SYSENTER_EIP:
A
Avi Kivity 已提交
906
		data = vmcs_readl(GUEST_SYSENTER_EIP);
A
Avi Kivity 已提交
907 908
		break;
	case MSR_IA32_SYSENTER_ESP:
A
Avi Kivity 已提交
909
		data = vmcs_readl(GUEST_SYSENTER_ESP);
A
Avi Kivity 已提交
910 911
		break;
	default:
912
		vmx_load_host_state(to_vmx(vcpu));
R
Rusty Russell 已提交
913
		msr = find_msr_entry(to_vmx(vcpu), msr_index);
914 915 916
		if (msr) {
			data = msr->data;
			break;
A
Avi Kivity 已提交
917
		}
918
		return kvm_get_msr_common(vcpu, msr_index, pdata);
A
Avi Kivity 已提交
919 920 921 922 923 924 925 926 927 928 929 930 931
	}

	*pdata = data;
	return 0;
}

/*
 * Writes msr value into into the appropriate "register".
 * Returns 0 on success, non-0 otherwise.
 * Assumes vcpu_load() was already called.
 */
static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
{
932 933
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	struct kvm_msr_entry *msr;
934
	u64 host_tsc;
935 936
	int ret = 0;

A
Avi Kivity 已提交
937
	switch (msr_index) {
938
#ifdef CONFIG_X86_64
939
	case MSR_EFER:
940
		vmx_load_host_state(vmx);
941 942
		ret = kvm_set_msr_common(vcpu, msr_index, data);
		break;
A
Avi Kivity 已提交
943 944 945 946 947 948 949 950 951 952 953
	case MSR_FS_BASE:
		vmcs_writel(GUEST_FS_BASE, data);
		break;
	case MSR_GS_BASE:
		vmcs_writel(GUEST_GS_BASE, data);
		break;
#endif
	case MSR_IA32_SYSENTER_CS:
		vmcs_write32(GUEST_SYSENTER_CS, data);
		break;
	case MSR_IA32_SYSENTER_EIP:
A
Avi Kivity 已提交
954
		vmcs_writel(GUEST_SYSENTER_EIP, data);
A
Avi Kivity 已提交
955 956
		break;
	case MSR_IA32_SYSENTER_ESP:
A
Avi Kivity 已提交
957
		vmcs_writel(GUEST_SYSENTER_ESP, data);
A
Avi Kivity 已提交
958
		break;
A
Avi Kivity 已提交
959
	case MSR_IA32_TIME_STAMP_COUNTER:
960 961
		rdtscll(host_tsc);
		guest_write_tsc(data, host_tsc);
962 963 964 965 966 967 968 969 970 971 972 973
		break;
	case MSR_P6_PERFCTR0:
	case MSR_P6_PERFCTR1:
	case MSR_P6_EVNTSEL0:
	case MSR_P6_EVNTSEL1:
		/*
		 * Just discard all writes to the performance counters; this
		 * should keep both older linux and windows 64-bit guests
		 * happy
		 */
		pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", msr_index, data);

A
Avi Kivity 已提交
974
		break;
S
Sheng Yang 已提交
975 976 977 978 979 980 981
	case MSR_IA32_CR_PAT:
		if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
			vmcs_write64(GUEST_IA32_PAT, data);
			vcpu->arch.pat = data;
			break;
		}
		/* Otherwise falls through to kvm_set_msr_common */
A
Avi Kivity 已提交
982
	default:
983
		vmx_load_host_state(vmx);
R
Rusty Russell 已提交
984
		msr = find_msr_entry(vmx, msr_index);
985 986 987
		if (msr) {
			msr->data = data;
			break;
A
Avi Kivity 已提交
988
		}
989
		ret = kvm_set_msr_common(vcpu, msr_index, data);
A
Avi Kivity 已提交
990 991
	}

992
	return ret;
A
Avi Kivity 已提交
993 994
}

995
static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
A
Avi Kivity 已提交
996
{
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
	switch (reg) {
	case VCPU_REGS_RSP:
		vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
		break;
	case VCPU_REGS_RIP:
		vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
		break;
	default:
		break;
	}
A
Avi Kivity 已提交
1008 1009
}

J
Jan Kiszka 已提交
1010
static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
A
Avi Kivity 已提交
1011
{
J
Jan Kiszka 已提交
1012 1013
	int old_debug = vcpu->guest_debug;
	unsigned long flags;
A
Avi Kivity 已提交
1014

J
Jan Kiszka 已提交
1015 1016 1017
	vcpu->guest_debug = dbg->control;
	if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
		vcpu->guest_debug = 0;
A
Avi Kivity 已提交
1018

1019 1020 1021 1022 1023
	if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
		vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]);
	else
		vmcs_writel(GUEST_DR7, vcpu->arch.dr7);

J
Jan Kiszka 已提交
1024 1025 1026 1027
	flags = vmcs_readl(GUEST_RFLAGS);
	if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
		flags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
	else if (old_debug & KVM_GUESTDBG_SINGLESTEP)
A
Avi Kivity 已提交
1028
		flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
J
Jan Kiszka 已提交
1029
	vmcs_writel(GUEST_RFLAGS, flags);
A
Avi Kivity 已提交
1030

1031
	update_exception_bitmap(vcpu);
A
Avi Kivity 已提交
1032 1033 1034 1035

	return 0;
}

E
Eddie Dong 已提交
1036 1037
static int vmx_get_irq(struct kvm_vcpu *vcpu)
{
1038 1039 1040
	if (!vcpu->arch.interrupt.pending)
		return -1;
	return vcpu->arch.interrupt.nr;
E
Eddie Dong 已提交
1041 1042
}

A
Avi Kivity 已提交
1043 1044
static __init int cpu_has_kvm_support(void)
{
1045
	return cpu_has_vmx();
A
Avi Kivity 已提交
1046 1047 1048 1049 1050 1051 1052
}

static __init int vmx_disabled_by_bios(void)
{
	u64 msr;

	rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
1053 1054 1055
	return (msr & (FEATURE_CONTROL_LOCKED |
		       FEATURE_CONTROL_VMXON_ENABLED))
	    == FEATURE_CONTROL_LOCKED;
1056
	/* locked but not enabled */
A
Avi Kivity 已提交
1057 1058
}

A
Avi Kivity 已提交
1059
static void hardware_enable(void *garbage)
A
Avi Kivity 已提交
1060 1061 1062 1063 1064
{
	int cpu = raw_smp_processor_id();
	u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
	u64 old;

1065
	INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
A
Avi Kivity 已提交
1066
	rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
1067 1068 1069 1070
	if ((old & (FEATURE_CONTROL_LOCKED |
		    FEATURE_CONTROL_VMXON_ENABLED))
	    != (FEATURE_CONTROL_LOCKED |
		FEATURE_CONTROL_VMXON_ENABLED))
A
Avi Kivity 已提交
1071
		/* enable and lock */
1072
		wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
1073 1074
		       FEATURE_CONTROL_LOCKED |
		       FEATURE_CONTROL_VMXON_ENABLED);
1075
	write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
1076 1077
	asm volatile (ASM_VMX_VMXON_RAX
		      : : "a"(&phys_addr), "m"(phys_addr)
A
Avi Kivity 已提交
1078 1079 1080
		      : "memory", "cc");
}

1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
static void vmclear_local_vcpus(void)
{
	int cpu = raw_smp_processor_id();
	struct vcpu_vmx *vmx, *n;

	list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu),
				 local_vcpus_link)
		__vcpu_clear(vmx);
}

1091 1092 1093 1094 1095

/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
 * tricks.
 */
static void kvm_cpu_vmxoff(void)
A
Avi Kivity 已提交
1096
{
1097
	asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
1098
	write_cr4(read_cr4() & ~X86_CR4_VMXE);
A
Avi Kivity 已提交
1099 1100
}

1101 1102 1103 1104 1105 1106
static void hardware_disable(void *garbage)
{
	vmclear_local_vcpus();
	kvm_cpu_vmxoff();
}

1107
static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
M
Mike Day 已提交
1108
				      u32 msr, u32 *result)
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
{
	u32 vmx_msr_low, vmx_msr_high;
	u32 ctl = ctl_min | ctl_opt;

	rdmsr(msr, vmx_msr_low, vmx_msr_high);

	ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
	ctl |= vmx_msr_low;  /* bit == 1 in low word  ==> must be one  */

	/* Ensure minimum (required) set of control bits are supported. */
	if (ctl_min & ~ctl)
Y
Yang, Sheng 已提交
1120
		return -EIO;
1121 1122 1123 1124 1125

	*result = ctl;
	return 0;
}

Y
Yang, Sheng 已提交
1126
static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
A
Avi Kivity 已提交
1127 1128
{
	u32 vmx_msr_low, vmx_msr_high;
S
Sheng Yang 已提交
1129
	u32 min, opt, min2, opt2;
1130 1131
	u32 _pin_based_exec_control = 0;
	u32 _cpu_based_exec_control = 0;
1132
	u32 _cpu_based_2nd_exec_control = 0;
1133 1134 1135 1136
	u32 _vmexit_control = 0;
	u32 _vmentry_control = 0;

	min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
1137
	opt = PIN_BASED_VIRTUAL_NMIS;
1138 1139
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
				&_pin_based_exec_control) < 0)
Y
Yang, Sheng 已提交
1140
		return -EIO;
1141 1142 1143 1144 1145 1146

	min = CPU_BASED_HLT_EXITING |
#ifdef CONFIG_X86_64
	      CPU_BASED_CR8_LOAD_EXITING |
	      CPU_BASED_CR8_STORE_EXITING |
#endif
S
Sheng Yang 已提交
1147 1148
	      CPU_BASED_CR3_LOAD_EXITING |
	      CPU_BASED_CR3_STORE_EXITING |
1149 1150
	      CPU_BASED_USE_IO_BITMAPS |
	      CPU_BASED_MOV_DR_EXITING |
M
Marcelo Tosatti 已提交
1151 1152
	      CPU_BASED_USE_TSC_OFFSETING |
	      CPU_BASED_INVLPG_EXITING;
1153
	opt = CPU_BASED_TPR_SHADOW |
S
Sheng Yang 已提交
1154
	      CPU_BASED_USE_MSR_BITMAPS |
1155
	      CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
1156 1157
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
				&_cpu_based_exec_control) < 0)
Y
Yang, Sheng 已提交
1158
		return -EIO;
1159 1160 1161 1162 1163
#ifdef CONFIG_X86_64
	if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
		_cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
					   ~CPU_BASED_CR8_STORE_EXITING;
#endif
1164
	if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
S
Sheng Yang 已提交
1165 1166
		min2 = 0;
		opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
1167
			SECONDARY_EXEC_WBINVD_EXITING |
S
Sheng Yang 已提交
1168 1169 1170 1171
			SECONDARY_EXEC_ENABLE_VPID |
			SECONDARY_EXEC_ENABLE_EPT;
		if (adjust_vmx_controls(min2, opt2,
					MSR_IA32_VMX_PROCBASED_CTLS2,
1172 1173 1174 1175 1176 1177 1178 1179
					&_cpu_based_2nd_exec_control) < 0)
			return -EIO;
	}
#ifndef CONFIG_X86_64
	if (!(_cpu_based_2nd_exec_control &
				SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
		_cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
#endif
S
Sheng Yang 已提交
1180
	if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
M
Marcelo Tosatti 已提交
1181 1182
		/* CR3 accesses and invlpg don't need to cause VM Exits when EPT
		   enabled */
S
Sheng Yang 已提交
1183
		min &= ~(CPU_BASED_CR3_LOAD_EXITING |
M
Marcelo Tosatti 已提交
1184 1185
			 CPU_BASED_CR3_STORE_EXITING |
			 CPU_BASED_INVLPG_EXITING);
S
Sheng Yang 已提交
1186 1187 1188 1189 1190 1191
		if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
					&_cpu_based_exec_control) < 0)
			return -EIO;
		rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
		      vmx_capability.ept, vmx_capability.vpid);
	}
1192 1193 1194 1195 1196

	min = 0;
#ifdef CONFIG_X86_64
	min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
#endif
S
Sheng Yang 已提交
1197
	opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
1198 1199
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
				&_vmexit_control) < 0)
Y
Yang, Sheng 已提交
1200
		return -EIO;
1201

S
Sheng Yang 已提交
1202 1203
	min = 0;
	opt = VM_ENTRY_LOAD_IA32_PAT;
1204 1205
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
				&_vmentry_control) < 0)
Y
Yang, Sheng 已提交
1206
		return -EIO;
A
Avi Kivity 已提交
1207

N
Nguyen Anh Quynh 已提交
1208
	rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
1209 1210 1211

	/* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
	if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
Y
Yang, Sheng 已提交
1212
		return -EIO;
1213 1214 1215 1216

#ifdef CONFIG_X86_64
	/* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
	if (vmx_msr_high & (1u<<16))
Y
Yang, Sheng 已提交
1217
		return -EIO;
1218 1219 1220 1221
#endif

	/* Require Write-Back (WB) memory type for VMCS accesses. */
	if (((vmx_msr_high >> 18) & 15) != 6)
Y
Yang, Sheng 已提交
1222
		return -EIO;
1223

Y
Yang, Sheng 已提交
1224 1225 1226
	vmcs_conf->size = vmx_msr_high & 0x1fff;
	vmcs_conf->order = get_order(vmcs_config.size);
	vmcs_conf->revision_id = vmx_msr_low;
1227

Y
Yang, Sheng 已提交
1228 1229
	vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
	vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
1230
	vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
Y
Yang, Sheng 已提交
1231 1232
	vmcs_conf->vmexit_ctrl         = _vmexit_control;
	vmcs_conf->vmentry_ctrl        = _vmentry_control;
1233 1234

	return 0;
N
Nguyen Anh Quynh 已提交
1235
}
A
Avi Kivity 已提交
1236 1237 1238 1239 1240 1241 1242

static struct vmcs *alloc_vmcs_cpu(int cpu)
{
	int node = cpu_to_node(cpu);
	struct page *pages;
	struct vmcs *vmcs;

1243
	pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order);
A
Avi Kivity 已提交
1244 1245 1246
	if (!pages)
		return NULL;
	vmcs = page_address(pages);
1247 1248
	memset(vmcs, 0, vmcs_config.size);
	vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
A
Avi Kivity 已提交
1249 1250 1251 1252 1253
	return vmcs;
}

static struct vmcs *alloc_vmcs(void)
{
1254
	return alloc_vmcs_cpu(raw_smp_processor_id());
A
Avi Kivity 已提交
1255 1256 1257 1258
}

static void free_vmcs(struct vmcs *vmcs)
{
1259
	free_pages((unsigned long)vmcs, vmcs_config.order);
A
Avi Kivity 已提交
1260 1261
}

1262
static void free_kvm_area(void)
A
Avi Kivity 已提交
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
{
	int cpu;

	for_each_online_cpu(cpu)
		free_vmcs(per_cpu(vmxarea, cpu));
}

static __init int alloc_kvm_area(void)
{
	int cpu;

	for_each_online_cpu(cpu) {
		struct vmcs *vmcs;

		vmcs = alloc_vmcs_cpu(cpu);
		if (!vmcs) {
			free_kvm_area();
			return -ENOMEM;
		}

		per_cpu(vmxarea, cpu) = vmcs;
	}
	return 0;
}

static __init int hardware_setup(void)
{
Y
Yang, Sheng 已提交
1290 1291
	if (setup_vmcs_config(&vmcs_config) < 0)
		return -EIO;
1292 1293 1294 1295

	if (boot_cpu_has(X86_FEATURE_NX))
		kvm_enable_efer_bits(EFER_NX);

A
Avi Kivity 已提交
1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
	return alloc_kvm_area();
}

static __exit void hardware_unsetup(void)
{
	free_kvm_area();
}

static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
{
	struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];

1308
	if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
A
Avi Kivity 已提交
1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
		vmcs_write16(sf->selector, save->selector);
		vmcs_writel(sf->base, save->base);
		vmcs_write32(sf->limit, save->limit);
		vmcs_write32(sf->ar_bytes, save->ar);
	} else {
		u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
			<< AR_DPL_SHIFT;
		vmcs_write32(sf->ar_bytes, 0x93 | dpl);
	}
}

static void enter_pmode(struct kvm_vcpu *vcpu)
{
	unsigned long flags;
1323
	struct vcpu_vmx *vmx = to_vmx(vcpu);
A
Avi Kivity 已提交
1324

1325
	vmx->emulation_required = 1;
1326
	vcpu->arch.rmode.active = 0;
A
Avi Kivity 已提交
1327

1328 1329 1330
	vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base);
	vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit);
	vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar);
A
Avi Kivity 已提交
1331 1332

	flags = vmcs_readl(GUEST_RFLAGS);
1333
	flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM);
1334
	flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT);
A
Avi Kivity 已提交
1335 1336
	vmcs_writel(GUEST_RFLAGS, flags);

1337 1338
	vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
			(vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
A
Avi Kivity 已提交
1339 1340 1341

	update_exception_bitmap(vcpu);

1342 1343 1344
	if (emulate_invalid_guest_state)
		return;

1345 1346 1347 1348
	fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
	fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
	fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
	fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
A
Avi Kivity 已提交
1349 1350 1351 1352 1353 1354 1355 1356 1357

	vmcs_write16(GUEST_SS_SELECTOR, 0);
	vmcs_write32(GUEST_SS_AR_BYTES, 0x93);

	vmcs_write16(GUEST_CS_SELECTOR,
		     vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
	vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
}

M
Mike Day 已提交
1358
static gva_t rmode_tss_base(struct kvm *kvm)
A
Avi Kivity 已提交
1359
{
1360
	if (!kvm->arch.tss_addr) {
1361 1362 1363 1364
		gfn_t base_gfn = kvm->memslots[0].base_gfn +
				 kvm->memslots[0].npages - 3;
		return base_gfn << PAGE_SHIFT;
	}
1365
	return kvm->arch.tss_addr;
A
Avi Kivity 已提交
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
}

static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
{
	struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];

	save->selector = vmcs_read16(sf->selector);
	save->base = vmcs_readl(sf->base);
	save->limit = vmcs_read32(sf->limit);
	save->ar = vmcs_read32(sf->ar_bytes);
1376 1377
	vmcs_write16(sf->selector, save->base >> 4);
	vmcs_write32(sf->base, save->base & 0xfffff);
A
Avi Kivity 已提交
1378 1379 1380 1381 1382 1383 1384
	vmcs_write32(sf->limit, 0xffff);
	vmcs_write32(sf->ar_bytes, 0xf3);
}

static void enter_rmode(struct kvm_vcpu *vcpu)
{
	unsigned long flags;
1385
	struct vcpu_vmx *vmx = to_vmx(vcpu);
A
Avi Kivity 已提交
1386

1387
	vmx->emulation_required = 1;
1388
	vcpu->arch.rmode.active = 1;
A
Avi Kivity 已提交
1389

1390
	vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
A
Avi Kivity 已提交
1391 1392
	vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));

1393
	vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
A
Avi Kivity 已提交
1394 1395
	vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);

1396
	vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
A
Avi Kivity 已提交
1397 1398 1399
	vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);

	flags = vmcs_readl(GUEST_RFLAGS);
1400 1401
	vcpu->arch.rmode.save_iopl
		= (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
A
Avi Kivity 已提交
1402

1403
	flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
A
Avi Kivity 已提交
1404 1405

	vmcs_writel(GUEST_RFLAGS, flags);
1406
	vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
A
Avi Kivity 已提交
1407 1408
	update_exception_bitmap(vcpu);

1409 1410 1411
	if (emulate_invalid_guest_state)
		goto continue_rmode;

A
Avi Kivity 已提交
1412 1413 1414 1415 1416
	vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
	vmcs_write32(GUEST_SS_LIMIT, 0xffff);
	vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);

	vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
1417
	vmcs_write32(GUEST_CS_LIMIT, 0xffff);
1418 1419
	if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
		vmcs_writel(GUEST_CS_BASE, 0xf0000);
A
Avi Kivity 已提交
1420 1421
	vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);

1422 1423 1424 1425
	fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
	fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
	fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
	fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
1426

1427
continue_rmode:
1428
	kvm_mmu_reset_context(vcpu);
1429
	init_rmode(vcpu->kvm);
A
Avi Kivity 已提交
1430 1431
}

1432
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
1433 1434 1435 1436 1437 1438 1439 1440

static void enter_lmode(struct kvm_vcpu *vcpu)
{
	u32 guest_tr_ar;

	guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
	if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
		printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
1441
		       __func__);
A
Avi Kivity 已提交
1442 1443 1444 1445 1446
		vmcs_write32(GUEST_TR_AR_BYTES,
			     (guest_tr_ar & ~AR_TYPE_MASK)
			     | AR_TYPE_BUSY_64_TSS);
	}

1447
	vcpu->arch.shadow_efer |= EFER_LMA;
A
Avi Kivity 已提交
1448

R
Rusty Russell 已提交
1449
	find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME;
A
Avi Kivity 已提交
1450 1451
	vmcs_write32(VM_ENTRY_CONTROLS,
		     vmcs_read32(VM_ENTRY_CONTROLS)
1452
		     | VM_ENTRY_IA32E_MODE);
A
Avi Kivity 已提交
1453 1454 1455 1456
}

static void exit_lmode(struct kvm_vcpu *vcpu)
{
1457
	vcpu->arch.shadow_efer &= ~EFER_LMA;
A
Avi Kivity 已提交
1458 1459 1460

	vmcs_write32(VM_ENTRY_CONTROLS,
		     vmcs_read32(VM_ENTRY_CONTROLS)
1461
		     & ~VM_ENTRY_IA32E_MODE);
A
Avi Kivity 已提交
1462 1463 1464 1465
}

#endif

1466 1467 1468
static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
{
	vpid_sync_vcpu_all(to_vmx(vcpu));
1469 1470
	if (vm_need_ept())
		ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
1471 1472
}

1473
static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
1474
{
1475 1476
	vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK;
	vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK;
1477 1478
}

1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
{
	if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
		if (!load_pdptrs(vcpu, vcpu->arch.cr3)) {
			printk(KERN_ERR "EPT: Fail to load pdptrs!\n");
			return;
		}
		vmcs_write64(GUEST_PDPTR0, vcpu->arch.pdptrs[0]);
		vmcs_write64(GUEST_PDPTR1, vcpu->arch.pdptrs[1]);
		vmcs_write64(GUEST_PDPTR2, vcpu->arch.pdptrs[2]);
		vmcs_write64(GUEST_PDPTR3, vcpu->arch.pdptrs[3]);
	}
}

static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);

static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
					unsigned long cr0,
					struct kvm_vcpu *vcpu)
{
	if (!(cr0 & X86_CR0_PG)) {
		/* From paging/starting to nonpaging */
		vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
1502
			     vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
1503 1504 1505 1506 1507 1508 1509 1510 1511
			     (CPU_BASED_CR3_LOAD_EXITING |
			      CPU_BASED_CR3_STORE_EXITING));
		vcpu->arch.cr0 = cr0;
		vmx_set_cr4(vcpu, vcpu->arch.cr4);
		*hw_cr0 |= X86_CR0_PE | X86_CR0_PG;
		*hw_cr0 &= ~X86_CR0_WP;
	} else if (!is_paging(vcpu)) {
		/* From nonpaging to paging */
		vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
1512
			     vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531
			     ~(CPU_BASED_CR3_LOAD_EXITING |
			       CPU_BASED_CR3_STORE_EXITING));
		vcpu->arch.cr0 = cr0;
		vmx_set_cr4(vcpu, vcpu->arch.cr4);
		if (!(vcpu->arch.cr0 & X86_CR0_WP))
			*hw_cr0 &= ~X86_CR0_WP;
	}
}

static void ept_update_paging_mode_cr4(unsigned long *hw_cr4,
					struct kvm_vcpu *vcpu)
{
	if (!is_paging(vcpu)) {
		*hw_cr4 &= ~X86_CR4_PAE;
		*hw_cr4 |= X86_CR4_PSE;
	} else if (!(vcpu->arch.cr4 & X86_CR4_PAE))
		*hw_cr4 &= ~X86_CR4_PAE;
}

A
Avi Kivity 已提交
1532 1533
static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
1534 1535 1536
	unsigned long hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) |
				KVM_VM_CR0_ALWAYS_ON;

1537 1538
	vmx_fpu_deactivate(vcpu);

1539
	if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE))
A
Avi Kivity 已提交
1540 1541
		enter_pmode(vcpu);

1542
	if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE))
A
Avi Kivity 已提交
1543 1544
		enter_rmode(vcpu);

1545
#ifdef CONFIG_X86_64
1546
	if (vcpu->arch.shadow_efer & EFER_LME) {
1547
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
A
Avi Kivity 已提交
1548
			enter_lmode(vcpu);
1549
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
A
Avi Kivity 已提交
1550 1551 1552 1553
			exit_lmode(vcpu);
	}
#endif

1554 1555 1556
	if (vm_need_ept())
		ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);

A
Avi Kivity 已提交
1557
	vmcs_writel(CR0_READ_SHADOW, cr0);
1558
	vmcs_writel(GUEST_CR0, hw_cr0);
1559
	vcpu->arch.cr0 = cr0;
1560

1561
	if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE))
1562
		vmx_fpu_activate(vcpu);
A
Avi Kivity 已提交
1563 1564
}

1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
static u64 construct_eptp(unsigned long root_hpa)
{
	u64 eptp;

	/* TODO write the value reading from MSR */
	eptp = VMX_EPT_DEFAULT_MT |
		VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
	eptp |= (root_hpa & PAGE_MASK);

	return eptp;
}

A
Avi Kivity 已提交
1577 1578
static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{
1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591
	unsigned long guest_cr3;
	u64 eptp;

	guest_cr3 = cr3;
	if (vm_need_ept()) {
		eptp = construct_eptp(cr3);
		vmcs_write64(EPT_POINTER, eptp);
		ept_sync_context(eptp);
		ept_load_pdptrs(vcpu);
		guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
			VMX_EPT_IDENTITY_PAGETABLE_ADDR;
	}

1592
	vmx_flush_tlb(vcpu);
1593
	vmcs_writel(GUEST_CR3, guest_cr3);
1594
	if (vcpu->arch.cr0 & X86_CR0_PE)
1595
		vmx_fpu_deactivate(vcpu);
A
Avi Kivity 已提交
1596 1597 1598 1599
}

static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
1600 1601 1602
	unsigned long hw_cr4 = cr4 | (vcpu->arch.rmode.active ?
		    KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);

1603
	vcpu->arch.cr4 = cr4;
1604 1605 1606 1607 1608
	if (vm_need_ept())
		ept_update_paging_mode_cr4(&hw_cr4, vcpu);

	vmcs_writel(CR4_READ_SHADOW, cr4);
	vmcs_writel(GUEST_CR4, hw_cr4);
A
Avi Kivity 已提交
1609 1610 1611 1612
}

static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
R
Rusty Russell 已提交
1613 1614
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
A
Avi Kivity 已提交
1615

1616
	vcpu->arch.shadow_efer = efer;
1617 1618
	if (!msr)
		return;
A
Avi Kivity 已提交
1619 1620 1621
	if (efer & EFER_LMA) {
		vmcs_write32(VM_ENTRY_CONTROLS,
				     vmcs_read32(VM_ENTRY_CONTROLS) |
1622
				     VM_ENTRY_IA32E_MODE);
A
Avi Kivity 已提交
1623 1624 1625 1626 1627
		msr->data = efer;

	} else {
		vmcs_write32(VM_ENTRY_CONTROLS,
				     vmcs_read32(VM_ENTRY_CONTROLS) &
1628
				     ~VM_ENTRY_IA32E_MODE);
A
Avi Kivity 已提交
1629 1630 1631

		msr->data = efer & ~EFER_LME;
	}
R
Rusty Russell 已提交
1632
	setup_msrs(vmx);
A
Avi Kivity 已提交
1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
}

static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
{
	struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];

	return vmcs_readl(sf->base);
}

static void vmx_get_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
	struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
	u32 ar;

	var->base = vmcs_readl(sf->base);
	var->limit = vmcs_read32(sf->limit);
	var->selector = vmcs_read16(sf->selector);
	ar = vmcs_read32(sf->ar_bytes);
	if (ar & AR_UNUSABLE_MASK)
		ar = 0;
	var->type = ar & 15;
	var->s = (ar >> 4) & 1;
	var->dpl = (ar >> 5) & 3;
	var->present = (ar >> 7) & 1;
	var->avl = (ar >> 12) & 1;
	var->l = (ar >> 13) & 1;
	var->db = (ar >> 14) & 1;
	var->g = (ar >> 15) & 1;
	var->unusable = (ar >> 16) & 1;
}

1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678
static int vmx_get_cpl(struct kvm_vcpu *vcpu)
{
	struct kvm_segment kvm_seg;

	if (!(vcpu->arch.cr0 & X86_CR0_PE)) /* if real mode */
		return 0;

	if (vmx_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */
		return 3;

	vmx_get_segment(vcpu, &kvm_seg, VCPU_SREG_CS);
	return kvm_seg.selector & 3;
}

1679
static u32 vmx_segment_access_rights(struct kvm_segment *var)
A
Avi Kivity 已提交
1680 1681 1682
{
	u32 ar;

1683
	if (var->unusable)
A
Avi Kivity 已提交
1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694
		ar = 1 << 16;
	else {
		ar = var->type & 15;
		ar |= (var->s & 1) << 4;
		ar |= (var->dpl & 3) << 5;
		ar |= (var->present & 1) << 7;
		ar |= (var->avl & 1) << 12;
		ar |= (var->l & 1) << 13;
		ar |= (var->db & 1) << 14;
		ar |= (var->g & 1) << 15;
	}
1695 1696
	if (ar == 0) /* a 0 value means unusable */
		ar = AR_UNUSABLE_MASK;
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706

	return ar;
}

static void vmx_set_segment(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg)
{
	struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
	u32 ar;

1707 1708 1709 1710 1711
	if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) {
		vcpu->arch.rmode.tr.selector = var->selector;
		vcpu->arch.rmode.tr.base = var->base;
		vcpu->arch.rmode.tr.limit = var->limit;
		vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var);
1712 1713 1714 1715 1716
		return;
	}
	vmcs_writel(sf->base, var->base);
	vmcs_write32(sf->limit, var->limit);
	vmcs_write16(sf->selector, var->selector);
1717
	if (vcpu->arch.rmode.active && var->s) {
1718 1719 1720 1721 1722 1723 1724 1725
		/*
		 * Hack real-mode segments into vm86 compatibility.
		 */
		if (var->base == 0xffff0000 && var->selector == 0xf000)
			vmcs_writel(sf->base, 0xf0000);
		ar = 0xf3;
	} else
		ar = vmx_segment_access_rights(var);
A
Avi Kivity 已提交
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760
	vmcs_write32(sf->ar_bytes, ar);
}

static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
{
	u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);

	*db = (ar >> 14) & 1;
	*l = (ar >> 13) & 1;
}

static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
{
	dt->limit = vmcs_read32(GUEST_IDTR_LIMIT);
	dt->base = vmcs_readl(GUEST_IDTR_BASE);
}

static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
{
	vmcs_write32(GUEST_IDTR_LIMIT, dt->limit);
	vmcs_writel(GUEST_IDTR_BASE, dt->base);
}

static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
{
	dt->limit = vmcs_read32(GUEST_GDTR_LIMIT);
	dt->base = vmcs_readl(GUEST_GDTR_BASE);
}

static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
{
	vmcs_write32(GUEST_GDTR_LIMIT, dt->limit);
	vmcs_writel(GUEST_GDTR_BASE, dt->base);
}

1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
{
	struct kvm_segment var;
	u32 ar;

	vmx_get_segment(vcpu, &var, seg);
	ar = vmx_segment_access_rights(&var);

	if (var.base != (var.selector << 4))
		return false;
	if (var.limit != 0xffff)
		return false;
	if (ar != 0xf3)
		return false;

	return true;
}

static bool code_segment_valid(struct kvm_vcpu *vcpu)
{
	struct kvm_segment cs;
	unsigned int cs_rpl;

	vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
	cs_rpl = cs.selector & SELECTOR_RPL_MASK;

1787 1788
	if (cs.unusable)
		return false;
1789 1790 1791 1792
	if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
		return false;
	if (!cs.s)
		return false;
1793
	if (cs.type & AR_TYPE_WRITEABLE_MASK) {
1794 1795
		if (cs.dpl > cs_rpl)
			return false;
1796
	} else {
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
		if (cs.dpl != cs_rpl)
			return false;
	}
	if (!cs.present)
		return false;

	/* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
	return true;
}

static bool stack_segment_valid(struct kvm_vcpu *vcpu)
{
	struct kvm_segment ss;
	unsigned int ss_rpl;

	vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
	ss_rpl = ss.selector & SELECTOR_RPL_MASK;

1815 1816 1817
	if (ss.unusable)
		return true;
	if (ss.type != 3 && ss.type != 7)
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
		return false;
	if (!ss.s)
		return false;
	if (ss.dpl != ss_rpl) /* DPL != RPL */
		return false;
	if (!ss.present)
		return false;

	return true;
}

static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
{
	struct kvm_segment var;
	unsigned int rpl;

	vmx_get_segment(vcpu, &var, seg);
	rpl = var.selector & SELECTOR_RPL_MASK;

1837 1838
	if (var.unusable)
		return true;
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
	if (!var.s)
		return false;
	if (!var.present)
		return false;
	if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
		if (var.dpl < rpl) /* DPL < RPL */
			return false;
	}

	/* TODO: Add other members to kvm_segment_field to allow checking for other access
	 * rights flags
	 */
	return true;
}

static bool tr_valid(struct kvm_vcpu *vcpu)
{
	struct kvm_segment tr;

	vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);

1860 1861
	if (tr.unusable)
		return false;
1862 1863
	if (tr.selector & SELECTOR_TI_MASK)	/* TI = 1 */
		return false;
1864
	if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877
		return false;
	if (!tr.present)
		return false;

	return true;
}

static bool ldtr_valid(struct kvm_vcpu *vcpu)
{
	struct kvm_segment ldtr;

	vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);

1878 1879
	if (ldtr.unusable)
		return true;
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950
	if (ldtr.selector & SELECTOR_TI_MASK)	/* TI = 1 */
		return false;
	if (ldtr.type != 2)
		return false;
	if (!ldtr.present)
		return false;

	return true;
}

static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
{
	struct kvm_segment cs, ss;

	vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
	vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);

	return ((cs.selector & SELECTOR_RPL_MASK) ==
		 (ss.selector & SELECTOR_RPL_MASK));
}

/*
 * Check if guest state is valid. Returns true if valid, false if
 * not.
 * We assume that registers are always usable
 */
static bool guest_state_valid(struct kvm_vcpu *vcpu)
{
	/* real mode guest state checks */
	if (!(vcpu->arch.cr0 & X86_CR0_PE)) {
		if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
			return false;
		if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
			return false;
		if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
			return false;
		if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
			return false;
		if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
			return false;
		if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
			return false;
	} else {
	/* protected mode guest state checks */
		if (!cs_ss_rpl_check(vcpu))
			return false;
		if (!code_segment_valid(vcpu))
			return false;
		if (!stack_segment_valid(vcpu))
			return false;
		if (!data_segment_valid(vcpu, VCPU_SREG_DS))
			return false;
		if (!data_segment_valid(vcpu, VCPU_SREG_ES))
			return false;
		if (!data_segment_valid(vcpu, VCPU_SREG_FS))
			return false;
		if (!data_segment_valid(vcpu, VCPU_SREG_GS))
			return false;
		if (!tr_valid(vcpu))
			return false;
		if (!ldtr_valid(vcpu))
			return false;
	}
	/* TODO:
	 * - Add checks on RIP
	 * - Add checks on RFLAGS
	 */

	return true;
}

M
Mike Day 已提交
1951
static int init_rmode_tss(struct kvm *kvm)
A
Avi Kivity 已提交
1952 1953
{
	gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
1954
	u16 data = 0;
1955
	int ret = 0;
1956
	int r;
A
Avi Kivity 已提交
1957

1958 1959
	r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
	if (r < 0)
1960
		goto out;
1961
	data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
1962 1963
	r = kvm_write_guest_page(kvm, fn++, &data,
			TSS_IOPB_BASE_OFFSET, sizeof(u16));
1964
	if (r < 0)
1965
		goto out;
1966 1967
	r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
	if (r < 0)
1968
		goto out;
1969 1970
	r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
	if (r < 0)
1971
		goto out;
1972
	data = ~0;
1973 1974 1975
	r = kvm_write_guest_page(kvm, fn, &data,
				 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
				 sizeof(u8));
1976
	if (r < 0)
1977 1978 1979 1980 1981
		goto out;

	ret = 1;
out:
	return ret;
A
Avi Kivity 已提交
1982 1983
}

1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
static int init_rmode_identity_map(struct kvm *kvm)
{
	int i, r, ret;
	pfn_t identity_map_pfn;
	u32 tmp;

	if (!vm_need_ept())
		return 1;
	if (unlikely(!kvm->arch.ept_identity_pagetable)) {
		printk(KERN_ERR "EPT: identity-mapping pagetable "
			"haven't been allocated!\n");
		return 0;
	}
	if (likely(kvm->arch.ept_identity_pagetable_done))
		return 1;
	ret = 0;
	identity_map_pfn = VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT;
	r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
	if (r < 0)
		goto out;
	/* Set up identity-mapping pagetable for EPT in real mode */
	for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
		tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
			_PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
		r = kvm_write_guest_page(kvm, identity_map_pfn,
				&tmp, i * sizeof(tmp), sizeof(tmp));
		if (r < 0)
			goto out;
	}
	kvm->arch.ept_identity_pagetable_done = true;
	ret = 1;
out:
	return ret;
}

A
Avi Kivity 已提交
2019 2020 2021 2022 2023 2024 2025
static void seg_setup(int seg)
{
	struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];

	vmcs_write16(sf->selector, 0);
	vmcs_writel(sf->base, 0);
	vmcs_write32(sf->limit, 0xffff);
2026
	vmcs_write32(sf->ar_bytes, 0xf3);
A
Avi Kivity 已提交
2027 2028
}

2029 2030 2031 2032 2033
static int alloc_apic_access_page(struct kvm *kvm)
{
	struct kvm_userspace_memory_region kvm_userspace_mem;
	int r = 0;

2034
	down_write(&kvm->slots_lock);
2035
	if (kvm->arch.apic_access_page)
2036 2037 2038 2039 2040 2041 2042 2043
		goto out;
	kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
	kvm_userspace_mem.flags = 0;
	kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
	kvm_userspace_mem.memory_size = PAGE_SIZE;
	r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
	if (r)
		goto out;
2044

2045
	kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
2046
out:
2047
	up_write(&kvm->slots_lock);
2048 2049 2050
	return r;
}

2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
static int alloc_identity_pagetable(struct kvm *kvm)
{
	struct kvm_userspace_memory_region kvm_userspace_mem;
	int r = 0;

	down_write(&kvm->slots_lock);
	if (kvm->arch.ept_identity_pagetable)
		goto out;
	kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
	kvm_userspace_mem.flags = 0;
	kvm_userspace_mem.guest_phys_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR;
	kvm_userspace_mem.memory_size = PAGE_SIZE;
	r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
	if (r)
		goto out;

	kvm->arch.ept_identity_pagetable = gfn_to_page(kvm,
			VMX_EPT_IDENTITY_PAGETABLE_ADDR >> PAGE_SHIFT);
out:
	up_write(&kvm->slots_lock);
	return r;
}

2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089
static void allocate_vpid(struct vcpu_vmx *vmx)
{
	int vpid;

	vmx->vpid = 0;
	if (!enable_vpid || !cpu_has_vmx_vpid())
		return;
	spin_lock(&vmx_vpid_lock);
	vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
	if (vpid < VMX_NR_VPIDS) {
		vmx->vpid = vpid;
		__set_bit(vpid, vmx_vpid_bitmap);
	}
	spin_unlock(&vmx_vpid_lock);
}

2090
static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr)
S
Sheng Yang 已提交
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113
{
	void *va;

	if (!cpu_has_vmx_msr_bitmap())
		return;

	/*
	 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
	 * have the write-low and read-high bitmap offsets the wrong way round.
	 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
	 */
	va = kmap(msr_bitmap);
	if (msr <= 0x1fff) {
		__clear_bit(msr, va + 0x000); /* read-low */
		__clear_bit(msr, va + 0x800); /* write-low */
	} else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
		msr &= 0x1fff;
		__clear_bit(msr, va + 0x400); /* read-high */
		__clear_bit(msr, va + 0xc00); /* write-high */
	}
	kunmap(msr_bitmap);
}

A
Avi Kivity 已提交
2114 2115 2116
/*
 * Sets up the vmcs for emulated real mode.
 */
R
Rusty Russell 已提交
2117
static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
A
Avi Kivity 已提交
2118
{
S
Sheng Yang 已提交
2119
	u32 host_sysenter_cs, msr_low, msr_high;
A
Avi Kivity 已提交
2120
	u32 junk;
2121
	u64 host_pat, tsc_this, tsc_base;
A
Avi Kivity 已提交
2122 2123 2124
	unsigned long a;
	struct descriptor_table dt;
	int i;
2125
	unsigned long kvm_vmx_return;
2126
	u32 exec_control;
A
Avi Kivity 已提交
2127 2128

	/* I/O */
2129 2130
	vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a));
	vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b));
A
Avi Kivity 已提交
2131

S
Sheng Yang 已提交
2132 2133 2134
	if (cpu_has_vmx_msr_bitmap())
		vmcs_write64(MSR_BITMAP, page_to_phys(vmx_msr_bitmap));

A
Avi Kivity 已提交
2135 2136 2137
	vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */

	/* Control */
2138 2139
	vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
		vmcs_config.pin_based_exec_ctrl);
2140 2141 2142 2143 2144 2145 2146 2147 2148

	exec_control = vmcs_config.cpu_based_exec_ctrl;
	if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
		exec_control &= ~CPU_BASED_TPR_SHADOW;
#ifdef CONFIG_X86_64
		exec_control |= CPU_BASED_CR8_STORE_EXITING |
				CPU_BASED_CR8_LOAD_EXITING;
#endif
	}
S
Sheng Yang 已提交
2149 2150
	if (!vm_need_ept())
		exec_control |= CPU_BASED_CR3_STORE_EXITING |
2151 2152
				CPU_BASED_CR3_LOAD_EXITING  |
				CPU_BASED_INVLPG_EXITING;
2153
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
A
Avi Kivity 已提交
2154

2155 2156 2157 2158 2159
	if (cpu_has_secondary_exec_ctrls()) {
		exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
		if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
			exec_control &=
				~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
2160 2161
		if (vmx->vpid == 0)
			exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
S
Sheng Yang 已提交
2162 2163
		if (!vm_need_ept())
			exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
2164 2165
		vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
	}
2166

2167 2168
	vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
	vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
A
Avi Kivity 已提交
2169 2170 2171 2172 2173 2174 2175 2176 2177
	vmcs_write32(CR3_TARGET_COUNT, 0);           /* 22.2.1 */

	vmcs_writel(HOST_CR0, read_cr0());  /* 22.2.3 */
	vmcs_writel(HOST_CR4, read_cr4());  /* 22.2.3, 22.2.5 */
	vmcs_writel(HOST_CR3, read_cr3());  /* 22.2.3  FIXME: shadow tables */

	vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS);  /* 22.2.4 */
	vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS);  /* 22.2.4 */
	vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS);  /* 22.2.4 */
2178 2179
	vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs());    /* 22.2.4 */
	vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs());    /* 22.2.4 */
A
Avi Kivity 已提交
2180
	vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS);  /* 22.2.4 */
2181
#ifdef CONFIG_X86_64
A
Avi Kivity 已提交
2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192
	rdmsrl(MSR_FS_BASE, a);
	vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
	rdmsrl(MSR_GS_BASE, a);
	vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
#else
	vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
	vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
#endif

	vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8);  /* 22.2.4 */

2193
	kvm_get_idt(&dt);
A
Avi Kivity 已提交
2194 2195
	vmcs_writel(HOST_IDTR_BASE, dt.base);   /* 22.2.4 */

M
Mike Day 已提交
2196
	asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
2197
	vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
2198 2199 2200
	vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
	vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
	vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
A
Avi Kivity 已提交
2201 2202 2203 2204 2205 2206 2207 2208

	rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
	vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
	rdmsrl(MSR_IA32_SYSENTER_ESP, a);
	vmcs_writel(HOST_IA32_SYSENTER_ESP, a);   /* 22.2.3 */
	rdmsrl(MSR_IA32_SYSENTER_EIP, a);
	vmcs_writel(HOST_IA32_SYSENTER_EIP, a);   /* 22.2.3 */

S
Sheng Yang 已提交
2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222
	if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
		rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
		host_pat = msr_low | ((u64) msr_high << 32);
		vmcs_write64(HOST_IA32_PAT, host_pat);
	}
	if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
		rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
		host_pat = msr_low | ((u64) msr_high << 32);
		/* Write the default value follow host pat */
		vmcs_write64(GUEST_IA32_PAT, host_pat);
		/* Keep arch.pat sync with GUEST_IA32_PAT */
		vmx->vcpu.arch.pat = host_pat;
	}

A
Avi Kivity 已提交
2223 2224 2225 2226
	for (i = 0; i < NR_VMX_MSR; ++i) {
		u32 index = vmx_msr_index[i];
		u32 data_low, data_high;
		u64 data;
2227
		int j = vmx->nmsrs;
A
Avi Kivity 已提交
2228 2229 2230

		if (rdmsr_safe(index, &data_low, &data_high) < 0)
			continue;
2231 2232
		if (wrmsr_safe(index, data_low, data_high) < 0)
			continue;
A
Avi Kivity 已提交
2233
		data = data_low | ((u64)data_high << 32);
2234 2235 2236 2237 2238
		vmx->host_msrs[j].index = index;
		vmx->host_msrs[j].reserved = 0;
		vmx->host_msrs[j].data = data;
		vmx->guest_msrs[j] = vmx->host_msrs[j];
		++vmx->nmsrs;
A
Avi Kivity 已提交
2239 2240
	}

2241
	vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
A
Avi Kivity 已提交
2242 2243

	/* 22.2.1, 20.8.1 */
2244 2245
	vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);

2246 2247 2248
	vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
	vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK);

2249 2250 2251 2252 2253 2254
	tsc_base = vmx->vcpu.kvm->arch.vm_init_tsc;
	rdtscll(tsc_this);
	if (tsc_this < vmx->vcpu.kvm->arch.vm_init_tsc)
		tsc_base = tsc_this;

	guest_write_tsc(0, tsc_base);
2255

2256 2257 2258
	return 0;
}

2259 2260 2261 2262 2263 2264 2265 2266 2267
static int init_rmode(struct kvm *kvm)
{
	if (!init_rmode_tss(kvm))
		return 0;
	if (!init_rmode_identity_map(kvm))
		return 0;
	return 1;
}

2268 2269 2270 2271 2272 2273
static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
{
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	u64 msr;
	int ret;

2274
	vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
2275
	down_read(&vcpu->kvm->slots_lock);
2276
	if (!init_rmode(vmx->vcpu.kvm)) {
2277 2278 2279 2280
		ret = -ENOMEM;
		goto out;
	}

2281
	vmx->vcpu.arch.rmode.active = 0;
2282

2283 2284
	vmx->soft_vnmi_blocked = 0;

2285
	vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
2286
	kvm_set_cr8(&vmx->vcpu, 0);
2287 2288 2289 2290 2291 2292 2293
	msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
	if (vmx->vcpu.vcpu_id == 0)
		msr |= MSR_IA32_APICBASE_BSP;
	kvm_set_apic_base(&vmx->vcpu, msr);

	fx_init(&vmx->vcpu);

2294
	seg_setup(VCPU_SREG_CS);
2295 2296 2297 2298 2299 2300 2301 2302
	/*
	 * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
	 * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4.  Sigh.
	 */
	if (vmx->vcpu.vcpu_id == 0) {
		vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
		vmcs_writel(GUEST_CS_BASE, 0x000f0000);
	} else {
2303 2304
		vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
		vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328
	}

	seg_setup(VCPU_SREG_DS);
	seg_setup(VCPU_SREG_ES);
	seg_setup(VCPU_SREG_FS);
	seg_setup(VCPU_SREG_GS);
	seg_setup(VCPU_SREG_SS);

	vmcs_write16(GUEST_TR_SELECTOR, 0);
	vmcs_writel(GUEST_TR_BASE, 0);
	vmcs_write32(GUEST_TR_LIMIT, 0xffff);
	vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);

	vmcs_write16(GUEST_LDTR_SELECTOR, 0);
	vmcs_writel(GUEST_LDTR_BASE, 0);
	vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
	vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);

	vmcs_write32(GUEST_SYSENTER_CS, 0);
	vmcs_writel(GUEST_SYSENTER_ESP, 0);
	vmcs_writel(GUEST_SYSENTER_EIP, 0);

	vmcs_writel(GUEST_RFLAGS, 0x02);
	if (vmx->vcpu.vcpu_id == 0)
2329
		kvm_rip_write(vcpu, 0xfff0);
2330
	else
2331 2332
		kvm_rip_write(vcpu, 0);
	kvm_register_write(vcpu, VCPU_REGS_RSP, 0);
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350

	vmcs_writel(GUEST_DR7, 0x400);

	vmcs_writel(GUEST_GDTR_BASE, 0);
	vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);

	vmcs_writel(GUEST_IDTR_BASE, 0);
	vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);

	vmcs_write32(GUEST_ACTIVITY_STATE, 0);
	vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
	vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);

	/* Special registers */
	vmcs_write64(GUEST_IA32_DEBUGCTL, 0);

	setup_msrs(vmx);

A
Avi Kivity 已提交
2351 2352
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);  /* 22.2.1 */

2353 2354 2355 2356
	if (cpu_has_vmx_tpr_shadow()) {
		vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
		if (vm_need_tpr_shadow(vmx->vcpu.kvm))
			vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
2357
				page_to_phys(vmx->vcpu.arch.apic->regs_page));
2358 2359 2360 2361 2362
		vmcs_write32(TPR_THRESHOLD, 0);
	}

	if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
		vmcs_write64(APIC_ACCESS_ADDR,
2363
			     page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
A
Avi Kivity 已提交
2364

2365 2366 2367
	if (vmx->vpid != 0)
		vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);

2368 2369
	vmx->vcpu.arch.cr0 = 0x60000010;
	vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */
R
Rusty Russell 已提交
2370 2371 2372 2373
	vmx_set_cr4(&vmx->vcpu, 0);
	vmx_set_efer(&vmx->vcpu, 0);
	vmx_fpu_activate(&vmx->vcpu);
	update_exception_bitmap(&vmx->vcpu);
A
Avi Kivity 已提交
2374

2375 2376
	vpid_sync_vcpu_all(vmx);

2377
	ret = 0;
A
Avi Kivity 已提交
2378

2379 2380 2381
	/* HACK: Don't enable emulation on guest boot/reset */
	vmx->emulation_required = 0;

A
Avi Kivity 已提交
2382
out:
2383
	up_read(&vcpu->kvm->slots_lock);
A
Avi Kivity 已提交
2384 2385 2386
	return ret;
}

2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409
static void enable_irq_window(struct kvm_vcpu *vcpu)
{
	u32 cpu_based_vm_exec_control;

	cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
	cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
}

static void enable_nmi_window(struct kvm_vcpu *vcpu)
{
	u32 cpu_based_vm_exec_control;

	if (!cpu_has_virtual_nmis()) {
		enable_irq_window(vcpu);
		return;
	}

	cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
	cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
}

2410 2411
static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq)
{
2412 2413
	struct vcpu_vmx *vmx = to_vmx(vcpu);

F
Feng (Eric) Liu 已提交
2414 2415
	KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler);

2416
	++vcpu->stat.irq_injections;
2417
	if (vcpu->arch.rmode.active) {
2418 2419
		vmx->rmode.irq.pending = true;
		vmx->rmode.irq.vector = irq;
2420
		vmx->rmode.irq.rip = kvm_rip_read(vcpu);
2421 2422 2423
		vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			     irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK);
		vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
2424
		kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
2425 2426 2427 2428 2429 2430
		return;
	}
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
}

2431 2432
static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
{
J
Jan Kiszka 已提交
2433 2434
	struct vcpu_vmx *vmx = to_vmx(vcpu);

2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447
	if (!cpu_has_virtual_nmis()) {
		/*
		 * Tracking the NMI-blocked state in software is built upon
		 * finding the next open IRQ window. This, in turn, depends on
		 * well-behaving guests: They have to keep IRQs disabled at
		 * least as long as the NMI handler runs. Otherwise we may
		 * cause NMI nesting, maybe breaking the guest. But as this is
		 * highly unlikely, we can live with the residual risk.
		 */
		vmx->soft_vnmi_blocked = 1;
		vmx->vnmi_blocked_time = 0;
	}

2448
	++vcpu->stat.nmi_injections;
J
Jan Kiszka 已提交
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
	if (vcpu->arch.rmode.active) {
		vmx->rmode.irq.pending = true;
		vmx->rmode.irq.vector = NMI_VECTOR;
		vmx->rmode.irq.rip = kvm_rip_read(vcpu);
		vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			     NMI_VECTOR | INTR_TYPE_SOFT_INTR |
			     INTR_INFO_VALID_MASK);
		vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
		kvm_rip_write(vcpu, vmx->rmode.irq.rip - 1);
		return;
	}
2460 2461 2462 2463
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
}

2464 2465 2466 2467 2468 2469 2470 2471
static void vmx_update_window_states(struct kvm_vcpu *vcpu)
{
	u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);

	vcpu->arch.nmi_window_open =
		!(guest_intr & (GUEST_INTR_STATE_STI |
				GUEST_INTR_STATE_MOV_SS |
				GUEST_INTR_STATE_NMI));
2472 2473
	if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
		vcpu->arch.nmi_window_open = 0;
2474 2475 2476 2477 2478 2479 2480

	vcpu->arch.interrupt_window_open =
		((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
		 !(guest_intr & (GUEST_INTR_STATE_STI |
				 GUEST_INTR_STATE_MOV_SS)));
}

A
Avi Kivity 已提交
2481 2482
static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
{
2483 2484
	int word_index = __ffs(vcpu->arch.irq_summary);
	int bit_index = __ffs(vcpu->arch.irq_pending[word_index]);
A
Avi Kivity 已提交
2485 2486
	int irq = word_index * BITS_PER_LONG + bit_index;

2487 2488 2489
	clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]);
	if (!vcpu->arch.irq_pending[word_index])
		clear_bit(word_index, &vcpu->arch.irq_summary);
2490
	kvm_queue_interrupt(vcpu, irq);
A
Avi Kivity 已提交
2491 2492
}

2493 2494 2495 2496 2497
static void do_interrupt_requests(struct kvm_vcpu *vcpu,
				       struct kvm_run *kvm_run)
{
	vmx_update_window_states(vcpu);

2498 2499 2500 2501 2502
	if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
		vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
				GUEST_INTR_STATE_STI |
				GUEST_INTR_STATE_MOV_SS);

2503
	if (vcpu->arch.nmi_pending && !vcpu->arch.nmi_injected) {
2504 2505 2506
		if (vcpu->arch.interrupt.pending) {
			enable_nmi_window(vcpu);
		} else if (vcpu->arch.nmi_window_open) {
2507 2508 2509 2510
			vcpu->arch.nmi_pending = false;
			vcpu->arch.nmi_injected = true;
		} else {
			enable_nmi_window(vcpu);
2511 2512
			return;
		}
2513 2514 2515
	}
	if (vcpu->arch.nmi_injected) {
		vmx_inject_nmi(vcpu);
2516
		if (vcpu->arch.nmi_pending)
2517
			enable_nmi_window(vcpu);
2518 2519 2520 2521
		else if (vcpu->arch.irq_summary
			 || kvm_run->request_interrupt_window)
			enable_irq_window(vcpu);
		return;
2522 2523
	}

2524 2525 2526 2527 2528 2529 2530
	if (vcpu->arch.interrupt_window_open) {
		if (vcpu->arch.irq_summary && !vcpu->arch.interrupt.pending)
			kvm_do_inject_irq(vcpu);

		if (vcpu->arch.interrupt.pending)
			vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
	}
2531 2532
	if (!vcpu->arch.interrupt_window_open &&
	    (vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
2533
		enable_irq_window(vcpu);
A
Avi Kivity 已提交
2534 2535
}

2536 2537 2538 2539
static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	int ret;
	struct kvm_userspace_memory_region tss_mem = {
2540
		.slot = TSS_PRIVATE_MEMSLOT,
2541 2542 2543 2544 2545 2546 2547 2548
		.guest_phys_addr = addr,
		.memory_size = PAGE_SIZE * 3,
		.flags = 0,
	};

	ret = kvm_set_memory_region(kvm, &tss_mem, 0);
	if (ret)
		return ret;
2549
	kvm->arch.tss_addr = addr;
2550 2551 2552
	return 0;
}

A
Avi Kivity 已提交
2553 2554 2555
static int handle_rmode_exception(struct kvm_vcpu *vcpu,
				  int vec, u32 err_code)
{
2556 2557 2558 2559 2560
	/*
	 * Instruction with address size override prefix opcode 0x67
	 * Cause the #SS fault with 0 error code in VM86 mode.
	 */
	if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
2561
		if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE)
A
Avi Kivity 已提交
2562
			return 1;
2563 2564 2565 2566 2567 2568 2569
	/*
	 * Forward all other exceptions that are valid in real mode.
	 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
	 *        the required debugging infrastructure rework.
	 */
	switch (vec) {
	case DB_VECTOR:
J
Jan Kiszka 已提交
2570 2571 2572 2573 2574
		if (vcpu->guest_debug &
		    (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
			return 0;
		kvm_queue_exception(vcpu, vec);
		return 1;
2575
	case BP_VECTOR:
J
Jan Kiszka 已提交
2576 2577 2578 2579
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
			return 0;
		/* fall through */
	case DE_VECTOR:
2580 2581 2582 2583 2584 2585 2586 2587 2588 2589
	case OF_VECTOR:
	case BR_VECTOR:
	case UD_VECTOR:
	case DF_VECTOR:
	case SS_VECTOR:
	case GP_VECTOR:
	case MF_VECTOR:
		kvm_queue_exception(vcpu, vec);
		return 1;
	}
A
Avi Kivity 已提交
2590 2591 2592 2593 2594
	return 0;
}

static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2595
	struct vcpu_vmx *vmx = to_vmx(vcpu);
J
Jan Kiszka 已提交
2596
	u32 intr_info, ex_no, error_code;
2597
	unsigned long cr2, rip, dr6;
A
Avi Kivity 已提交
2598 2599 2600
	u32 vect_info;
	enum emulation_result er;

2601
	vect_info = vmx->idt_vectoring_info;
A
Avi Kivity 已提交
2602 2603 2604
	intr_info = vmcs_read32(VM_EXIT_INTR_INFO);

	if ((vect_info & VECTORING_INFO_VALID_MASK) &&
M
Mike Day 已提交
2605
						!is_page_fault(intr_info))
A
Avi Kivity 已提交
2606
		printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
2607
		       "intr info 0x%x\n", __func__, vect_info, intr_info);
A
Avi Kivity 已提交
2608

2609
	if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) {
A
Avi Kivity 已提交
2610
		int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
2611 2612
		set_bit(irq, vcpu->arch.irq_pending);
		set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
A
Avi Kivity 已提交
2613 2614
	}

2615
	if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
2616
		return 1;  /* already handled by vmx_vcpu_run() */
2617 2618

	if (is_no_device(intr_info)) {
2619
		vmx_fpu_activate(vcpu);
2620 2621 2622
		return 1;
	}

2623
	if (is_invalid_opcode(intr_info)) {
2624
		er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD);
2625
		if (er != EMULATE_DONE)
2626
			kvm_queue_exception(vcpu, UD_VECTOR);
2627 2628 2629
		return 1;
	}

A
Avi Kivity 已提交
2630
	error_code = 0;
2631
	rip = kvm_rip_read(vcpu);
2632
	if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
A
Avi Kivity 已提交
2633 2634
		error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
	if (is_page_fault(intr_info)) {
2635 2636 2637
		/* EPT won't cause page fault directly */
		if (vm_need_ept())
			BUG();
A
Avi Kivity 已提交
2638
		cr2 = vmcs_readl(EXIT_QUALIFICATION);
F
Feng (Eric) Liu 已提交
2639 2640
		KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
			    (u32)((u64)cr2 >> 32), handler);
2641
		if (vcpu->arch.interrupt.pending || vcpu->arch.exception.pending)
2642
			kvm_mmu_unprotect_page_virt(vcpu, cr2);
2643
		return kvm_mmu_page_fault(vcpu, cr2, error_code);
A
Avi Kivity 已提交
2644 2645
	}

2646
	if (vcpu->arch.rmode.active &&
A
Avi Kivity 已提交
2647
	    handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
2648
								error_code)) {
2649 2650
		if (vcpu->arch.halt_request) {
			vcpu->arch.halt_request = 0;
2651 2652
			return kvm_emulate_halt(vcpu);
		}
A
Avi Kivity 已提交
2653
		return 1;
2654
	}
A
Avi Kivity 已提交
2655

J
Jan Kiszka 已提交
2656
	ex_no = intr_info & INTR_INFO_VECTOR_MASK;
2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669
	switch (ex_no) {
	case DB_VECTOR:
		dr6 = vmcs_readl(EXIT_QUALIFICATION);
		if (!(vcpu->guest_debug &
		      (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
			vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
			kvm_queue_exception(vcpu, DB_VECTOR);
			return 1;
		}
		kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
		kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
		/* fall through */
	case BP_VECTOR:
A
Avi Kivity 已提交
2670
		kvm_run->exit_reason = KVM_EXIT_DEBUG;
J
Jan Kiszka 已提交
2671 2672
		kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
		kvm_run->debug.arch.exception = ex_no;
2673 2674
		break;
	default:
J
Jan Kiszka 已提交
2675 2676 2677
		kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
		kvm_run->ex.exception = ex_no;
		kvm_run->ex.error_code = error_code;
2678
		break;
A
Avi Kivity 已提交
2679 2680 2681 2682 2683 2684 2685
	}
	return 0;
}

static int handle_external_interrupt(struct kvm_vcpu *vcpu,
				     struct kvm_run *kvm_run)
{
A
Avi Kivity 已提交
2686
	++vcpu->stat.irq_exits;
F
Feng (Eric) Liu 已提交
2687
	KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler);
A
Avi Kivity 已提交
2688 2689 2690
	return 1;
}

2691 2692 2693 2694 2695
static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
	return 0;
}
A
Avi Kivity 已提交
2696 2697 2698

static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2699
	unsigned long exit_qualification;
2700 2701
	int size, down, in, string, rep;
	unsigned port;
A
Avi Kivity 已提交
2702

A
Avi Kivity 已提交
2703
	++vcpu->stat.io_exits;
2704
	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
2705
	string = (exit_qualification & 16) != 0;
2706 2707

	if (string) {
2708 2709
		if (emulate_instruction(vcpu,
					kvm_run, 0, 0, 0) == EMULATE_DO_MMIO)
2710 2711 2712 2713 2714 2715
			return 0;
		return 1;
	}

	size = (exit_qualification & 7) + 1;
	in = (exit_qualification & 8) != 0;
2716 2717 2718
	down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0;
	rep = (exit_qualification & 32) != 0;
	port = exit_qualification >> 16;
2719

2720
	skip_emulated_instruction(vcpu);
L
Laurent Vivier 已提交
2721
	return kvm_emulate_pio(vcpu, kvm_run, in, size, port);
A
Avi Kivity 已提交
2722 2723
}

I
Ingo Molnar 已提交
2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
static void
vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
{
	/*
	 * Patch in the VMCALL instruction:
	 */
	hypercall[0] = 0x0f;
	hypercall[1] = 0x01;
	hypercall[2] = 0xc1;
}

A
Avi Kivity 已提交
2735 2736
static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2737
	unsigned long exit_qualification;
A
Avi Kivity 已提交
2738 2739 2740
	int cr;
	int reg;

2741
	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
A
Avi Kivity 已提交
2742 2743 2744 2745
	cr = exit_qualification & 15;
	reg = (exit_qualification >> 8) & 15;
	switch ((exit_qualification >> 4) & 3) {
	case 0: /* mov to cr */
2746 2747 2748 2749
		KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr,
			    (u32)kvm_register_read(vcpu, reg),
			    (u32)((u64)kvm_register_read(vcpu, reg) >> 32),
			    handler);
A
Avi Kivity 已提交
2750 2751
		switch (cr) {
		case 0:
2752
			kvm_set_cr0(vcpu, kvm_register_read(vcpu, reg));
A
Avi Kivity 已提交
2753 2754 2755
			skip_emulated_instruction(vcpu);
			return 1;
		case 3:
2756
			kvm_set_cr3(vcpu, kvm_register_read(vcpu, reg));
A
Avi Kivity 已提交
2757 2758 2759
			skip_emulated_instruction(vcpu);
			return 1;
		case 4:
2760
			kvm_set_cr4(vcpu, kvm_register_read(vcpu, reg));
A
Avi Kivity 已提交
2761 2762 2763
			skip_emulated_instruction(vcpu);
			return 1;
		case 8:
2764
			kvm_set_cr8(vcpu, kvm_register_read(vcpu, reg));
A
Avi Kivity 已提交
2765
			skip_emulated_instruction(vcpu);
2766 2767
			if (irqchip_in_kernel(vcpu->kvm))
				return 1;
2768 2769
			kvm_run->exit_reason = KVM_EXIT_SET_TPR;
			return 0;
A
Avi Kivity 已提交
2770 2771
		};
		break;
2772
	case 2: /* clts */
2773
		vmx_fpu_deactivate(vcpu);
2774 2775
		vcpu->arch.cr0 &= ~X86_CR0_TS;
		vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
2776
		vmx_fpu_activate(vcpu);
F
Feng (Eric) Liu 已提交
2777
		KVMTRACE_0D(CLTS, vcpu, handler);
2778 2779
		skip_emulated_instruction(vcpu);
		return 1;
A
Avi Kivity 已提交
2780 2781 2782
	case 1: /*mov from cr*/
		switch (cr) {
		case 3:
2783
			kvm_register_write(vcpu, reg, vcpu->arch.cr3);
F
Feng (Eric) Liu 已提交
2784
			KVMTRACE_3D(CR_READ, vcpu, (u32)cr,
2785 2786
				    (u32)kvm_register_read(vcpu, reg),
				    (u32)((u64)kvm_register_read(vcpu, reg) >> 32),
F
Feng (Eric) Liu 已提交
2787
				    handler);
A
Avi Kivity 已提交
2788 2789 2790
			skip_emulated_instruction(vcpu);
			return 1;
		case 8:
2791
			kvm_register_write(vcpu, reg, kvm_get_cr8(vcpu));
F
Feng (Eric) Liu 已提交
2792
			KVMTRACE_2D(CR_READ, vcpu, (u32)cr,
2793
				    (u32)kvm_register_read(vcpu, reg), handler);
A
Avi Kivity 已提交
2794 2795 2796 2797 2798
			skip_emulated_instruction(vcpu);
			return 1;
		}
		break;
	case 3: /* lmsw */
2799
		kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f);
A
Avi Kivity 已提交
2800 2801 2802 2803 2804 2805 2806

		skip_emulated_instruction(vcpu);
		return 1;
	default:
		break;
	}
	kvm_run->exit_reason = 0;
2807
	pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
A
Avi Kivity 已提交
2808 2809 2810 2811 2812 2813
	       (int)(exit_qualification >> 4) & 3, cr);
	return 0;
}

static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2814
	unsigned long exit_qualification;
A
Avi Kivity 已提交
2815 2816 2817
	unsigned long val;
	int dr, reg;

2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842
	dr = vmcs_readl(GUEST_DR7);
	if (dr & DR7_GD) {
		/*
		 * As the vm-exit takes precedence over the debug trap, we
		 * need to emulate the latter, either for the host or the
		 * guest debugging itself.
		 */
		if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
			kvm_run->debug.arch.dr6 = vcpu->arch.dr6;
			kvm_run->debug.arch.dr7 = dr;
			kvm_run->debug.arch.pc =
				vmcs_readl(GUEST_CS_BASE) +
				vmcs_readl(GUEST_RIP);
			kvm_run->debug.arch.exception = DB_VECTOR;
			kvm_run->exit_reason = KVM_EXIT_DEBUG;
			return 0;
		} else {
			vcpu->arch.dr7 &= ~DR7_GD;
			vcpu->arch.dr6 |= DR6_BD;
			vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
			kvm_queue_exception(vcpu, DB_VECTOR);
			return 1;
		}
	}

2843
	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
2844 2845 2846
	dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
	reg = DEBUG_REG_ACCESS_REG(exit_qualification);
	if (exit_qualification & TYPE_MOV_FROM_DR) {
A
Avi Kivity 已提交
2847
		switch (dr) {
2848 2849 2850
		case 0 ... 3:
			val = vcpu->arch.db[dr];
			break;
A
Avi Kivity 已提交
2851
		case 6:
2852
			val = vcpu->arch.dr6;
A
Avi Kivity 已提交
2853 2854
			break;
		case 7:
2855
			val = vcpu->arch.dr7;
A
Avi Kivity 已提交
2856 2857 2858 2859
			break;
		default:
			val = 0;
		}
2860
		kvm_register_write(vcpu, reg, val);
F
Feng (Eric) Liu 已提交
2861
		KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler);
A
Avi Kivity 已提交
2862
	} else {
2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894
		val = vcpu->arch.regs[reg];
		switch (dr) {
		case 0 ... 3:
			vcpu->arch.db[dr] = val;
			if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
				vcpu->arch.eff_db[dr] = val;
			break;
		case 4 ... 5:
			if (vcpu->arch.cr4 & X86_CR4_DE)
				kvm_queue_exception(vcpu, UD_VECTOR);
			break;
		case 6:
			if (val & 0xffffffff00000000ULL) {
				kvm_queue_exception(vcpu, GP_VECTOR);
				break;
			}
			vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
			break;
		case 7:
			if (val & 0xffffffff00000000ULL) {
				kvm_queue_exception(vcpu, GP_VECTOR);
				break;
			}
			vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
			if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
				vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
				vcpu->arch.switch_db_regs =
					(val & DR7_BP_EN_MASK);
			}
			break;
		}
		KVMTRACE_2D(DR_WRITE, vcpu, (u32)dr, (u32)val, handler);
A
Avi Kivity 已提交
2895 2896 2897 2898 2899 2900 2901
	}
	skip_emulated_instruction(vcpu);
	return 1;
}

static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2902 2903
	kvm_emulate_cpuid(vcpu);
	return 1;
A
Avi Kivity 已提交
2904 2905 2906 2907
}

static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2908
	u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
A
Avi Kivity 已提交
2909 2910 2911
	u64 data;

	if (vmx_get_msr(vcpu, ecx, &data)) {
2912
		kvm_inject_gp(vcpu, 0);
A
Avi Kivity 已提交
2913 2914 2915
		return 1;
	}

F
Feng (Eric) Liu 已提交
2916 2917 2918
	KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32),
		    handler);

A
Avi Kivity 已提交
2919
	/* FIXME: handling of bits 32:63 of rax, rdx */
2920 2921
	vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
	vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
A
Avi Kivity 已提交
2922 2923 2924 2925 2926 2927
	skip_emulated_instruction(vcpu);
	return 1;
}

static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2928 2929 2930
	u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
	u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
		| ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
A
Avi Kivity 已提交
2931

F
Feng (Eric) Liu 已提交
2932 2933 2934
	KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32),
		    handler);

A
Avi Kivity 已提交
2935
	if (vmx_set_msr(vcpu, ecx, data) != 0) {
2936
		kvm_inject_gp(vcpu, 0);
A
Avi Kivity 已提交
2937 2938 2939 2940 2941 2942 2943
		return 1;
	}

	skip_emulated_instruction(vcpu);
	return 1;
}

2944 2945 2946 2947 2948 2949
static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu,
				      struct kvm_run *kvm_run)
{
	return 1;
}

A
Avi Kivity 已提交
2950 2951 2952
static int handle_interrupt_window(struct kvm_vcpu *vcpu,
				   struct kvm_run *kvm_run)
{
2953 2954 2955 2956 2957 2958
	u32 cpu_based_vm_exec_control;

	/* clear pending irq */
	cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
	cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
F
Feng (Eric) Liu 已提交
2959 2960

	KVMTRACE_0D(PEND_INTR, vcpu, handler);
2961
	++vcpu->stat.irq_window_exits;
F
Feng (Eric) Liu 已提交
2962

2963 2964 2965 2966 2967
	/*
	 * If the user space waits to inject interrupts, exit as soon as
	 * possible
	 */
	if (kvm_run->request_interrupt_window &&
2968
	    !vcpu->arch.irq_summary) {
2969 2970 2971
		kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
		return 0;
	}
A
Avi Kivity 已提交
2972 2973 2974 2975 2976 2977
	return 1;
}

static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	skip_emulated_instruction(vcpu);
2978
	return kvm_emulate_halt(vcpu);
A
Avi Kivity 已提交
2979 2980
}

2981 2982
static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2983
	skip_emulated_instruction(vcpu);
2984 2985
	kvm_emulate_hypercall(vcpu);
	return 1;
2986 2987
}

M
Marcelo Tosatti 已提交
2988 2989 2990 2991 2992 2993 2994 2995 2996
static int handle_invlpg(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	u64 exit_qualification = vmcs_read64(EXIT_QUALIFICATION);

	kvm_mmu_invlpg(vcpu, exit_qualification);
	skip_emulated_instruction(vcpu);
	return 1;
}

E
Eddie Dong 已提交
2997 2998 2999 3000 3001 3002 3003
static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	skip_emulated_instruction(vcpu);
	/* TODO: Add support for VT-d/pass-through device */
	return 1;
}

3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023
static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	u64 exit_qualification;
	enum emulation_result er;
	unsigned long offset;

	exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
	offset = exit_qualification & 0xffful;

	er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);

	if (er !=  EMULATE_DONE) {
		printk(KERN_ERR
		       "Fail to handle apic access vmexit! Offset is 0x%lx\n",
		       offset);
		return -ENOTSUPP;
	}
	return 1;
}

3024 3025
static int handle_task_switch(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
J
Jan Kiszka 已提交
3026
	struct vcpu_vmx *vmx = to_vmx(vcpu);
3027 3028 3029 3030 3031 3032 3033
	unsigned long exit_qualification;
	u16 tss_selector;
	int reason;

	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);

	reason = (u32)exit_qualification >> 30;
J
Jan Kiszka 已提交
3034 3035 3036 3037 3038 3039 3040 3041 3042
	if (reason == TASK_SWITCH_GATE && vmx->vcpu.arch.nmi_injected &&
	    (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) &&
	    (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK)
	    == INTR_TYPE_NMI_INTR) {
		vcpu->arch.nmi_injected = false;
		if (cpu_has_virtual_nmis())
			vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
				      GUEST_INTR_STATE_NMI);
	}
3043 3044
	tss_selector = exit_qualification;

3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056
	if (!kvm_task_switch(vcpu, tss_selector, reason))
		return 0;

	/* clear all local breakpoint enable flags */
	vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);

	/*
	 * TODO: What about debug traps on tss switch?
	 *       Are we supposed to inject them and update dr6?
	 */

	return 1;
3057 3058
}

3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116
static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	u64 exit_qualification;
	enum emulation_result er;
	gpa_t gpa;
	unsigned long hva;
	int gla_validity;
	int r;

	exit_qualification = vmcs_read64(EXIT_QUALIFICATION);

	if (exit_qualification & (1 << 6)) {
		printk(KERN_ERR "EPT: GPA exceeds GAW!\n");
		return -ENOTSUPP;
	}

	gla_validity = (exit_qualification >> 7) & 0x3;
	if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
		printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
		printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
			(long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
			(long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS));
		printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
			(long unsigned int)exit_qualification);
		kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
		kvm_run->hw.hardware_exit_reason = 0;
		return -ENOTSUPP;
	}

	gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
	hva = gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT);
	if (!kvm_is_error_hva(hva)) {
		r = kvm_mmu_page_fault(vcpu, gpa & PAGE_MASK, 0);
		if (r < 0) {
			printk(KERN_ERR "EPT: Not enough memory!\n");
			return -ENOMEM;
		}
		return 1;
	} else {
		/* must be MMIO */
		er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);

		if (er == EMULATE_FAIL) {
			printk(KERN_ERR
			 "EPT: Fail to handle EPT violation vmexit!er is %d\n",
			 er);
			printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
			 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
			 (long unsigned int)vmcs_read64(GUEST_LINEAR_ADDRESS));
			printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
				(long unsigned int)exit_qualification);
			return -ENOTSUPP;
		} else if (er == EMULATE_DO_MMIO)
			return 0;
	}
	return 1;
}

3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129
static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	u32 cpu_based_vm_exec_control;

	/* clear pending NMI */
	cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
	cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
	++vcpu->stat.nmi_window_exits;

	return 1;
}

3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141
static void handle_invalid_guest_state(struct kvm_vcpu *vcpu,
				struct kvm_run *kvm_run)
{
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	int err;

	preempt_enable();
	local_irq_enable();

	while (!guest_state_valid(vcpu)) {
		err = emulate_instruction(vcpu, kvm_run, 0, 0, 0);

3142 3143 3144 3145 3146 3147
		if (err == EMULATE_DO_MMIO)
			break;

		if (err != EMULATE_DONE) {
			kvm_report_emulation_failure(vcpu, "emulation failure");
			return;
3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158
		}

		if (signal_pending(current))
			break;
		if (need_resched())
			schedule();
	}

	local_irq_disable();
	preempt_disable();

3159 3160 3161 3162
	/* Guest state should be valid now except if we need to
	 * emulate an MMIO */
	if (guest_state_valid(vcpu))
		vmx->emulation_required = 0;
3163 3164
}

A
Avi Kivity 已提交
3165 3166 3167 3168 3169 3170 3171 3172 3173
/*
 * The exit handlers return 1 if the exit was handled fully and guest execution
 * may resume.  Otherwise they set the kvm_run parameter to indicate what needs
 * to be done to userspace and return 0.
 */
static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
				      struct kvm_run *kvm_run) = {
	[EXIT_REASON_EXCEPTION_NMI]           = handle_exception,
	[EXIT_REASON_EXTERNAL_INTERRUPT]      = handle_external_interrupt,
3174
	[EXIT_REASON_TRIPLE_FAULT]            = handle_triple_fault,
3175
	[EXIT_REASON_NMI_WINDOW]	      = handle_nmi_window,
A
Avi Kivity 已提交
3176 3177 3178 3179 3180 3181 3182 3183
	[EXIT_REASON_IO_INSTRUCTION]          = handle_io,
	[EXIT_REASON_CR_ACCESS]               = handle_cr,
	[EXIT_REASON_DR_ACCESS]               = handle_dr,
	[EXIT_REASON_CPUID]                   = handle_cpuid,
	[EXIT_REASON_MSR_READ]                = handle_rdmsr,
	[EXIT_REASON_MSR_WRITE]               = handle_wrmsr,
	[EXIT_REASON_PENDING_INTERRUPT]       = handle_interrupt_window,
	[EXIT_REASON_HLT]                     = handle_halt,
M
Marcelo Tosatti 已提交
3184
	[EXIT_REASON_INVLPG]		      = handle_invlpg,
3185
	[EXIT_REASON_VMCALL]                  = handle_vmcall,
3186 3187
	[EXIT_REASON_TPR_BELOW_THRESHOLD]     = handle_tpr_below_threshold,
	[EXIT_REASON_APIC_ACCESS]             = handle_apic_access,
E
Eddie Dong 已提交
3188
	[EXIT_REASON_WBINVD]                  = handle_wbinvd,
3189
	[EXIT_REASON_TASK_SWITCH]             = handle_task_switch,
3190
	[EXIT_REASON_EPT_VIOLATION]	      = handle_ept_violation,
A
Avi Kivity 已提交
3191 3192 3193
};

static const int kvm_vmx_max_exit_handlers =
3194
	ARRAY_SIZE(kvm_vmx_exit_handlers);
A
Avi Kivity 已提交
3195 3196 3197 3198 3199 3200 3201 3202

/*
 * The guest has exited.  See if we can fix it or if we need userspace
 * assistance.
 */
static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
	u32 exit_reason = vmcs_read32(VM_EXIT_REASON);
3203
	struct vcpu_vmx *vmx = to_vmx(vcpu);
3204
	u32 vectoring_info = vmx->idt_vectoring_info;
3205

3206 3207
	KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)kvm_rip_read(vcpu),
		    (u32)((u64)kvm_rip_read(vcpu) >> 32), entryexit);
F
Feng (Eric) Liu 已提交
3208

3209 3210 3211 3212 3213
	/* If we need to emulate an MMIO from handle_invalid_guest_state
	 * we just return 0 */
	if (vmx->emulation_required && emulate_invalid_guest_state)
		return 0;

3214 3215 3216 3217 3218 3219 3220
	/* Access CR3 don't cause VMExit in paging mode, so we need
	 * to sync with guest real CR3. */
	if (vm_need_ept() && is_paging(vcpu)) {
		vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
		ept_load_pdptrs(vcpu);
	}

3221 3222 3223 3224 3225 3226
	if (unlikely(vmx->fail)) {
		kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
		kvm_run->fail_entry.hardware_entry_failure_reason
			= vmcs_read32(VM_INSTRUCTION_ERROR);
		return 0;
	}
A
Avi Kivity 已提交
3227

M
Mike Day 已提交
3228
	if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
3229
			(exit_reason != EXIT_REASON_EXCEPTION_NMI &&
J
Jan Kiszka 已提交
3230 3231 3232 3233 3234
			exit_reason != EXIT_REASON_EPT_VIOLATION &&
			exit_reason != EXIT_REASON_TASK_SWITCH))
		printk(KERN_WARNING "%s: unexpected, valid vectoring info "
		       "(0x%x) and exit reason is 0x%x\n",
		       __func__, vectoring_info, exit_reason);
3235 3236 3237 3238 3239 3240

	if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) {
		if (vcpu->arch.interrupt_window_open) {
			vmx->soft_vnmi_blocked = 0;
			vcpu->arch.nmi_window_open = 1;
		} else if (vmx->vnmi_blocked_time > 1000000000LL &&
3241
			   vcpu->arch.nmi_pending) {
3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255
			/*
			 * This CPU don't support us in finding the end of an
			 * NMI-blocked window if the guest runs with IRQs
			 * disabled. So we pull the trigger after 1 s of
			 * futile waiting, but inform the user about this.
			 */
			printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
			       "state on VCPU %d after 1 s timeout\n",
			       __func__, vcpu->vcpu_id);
			vmx->soft_vnmi_blocked = 0;
			vmx->vcpu.arch.nmi_window_open = 1;
		}
	}

A
Avi Kivity 已提交
3256 3257 3258 3259 3260 3261 3262 3263 3264 3265
	if (exit_reason < kvm_vmx_max_exit_handlers
	    && kvm_vmx_exit_handlers[exit_reason])
		return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
	else {
		kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
		kvm_run->hw.hardware_exit_reason = exit_reason;
	}
	return 0;
}

3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282
static void update_tpr_threshold(struct kvm_vcpu *vcpu)
{
	int max_irr, tpr;

	if (!vm_need_tpr_shadow(vcpu->kvm))
		return;

	if (!kvm_lapic_enabled(vcpu) ||
	    ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) {
		vmcs_write32(TPR_THRESHOLD, 0);
		return;
	}

	tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4;
	vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4);
}

3283 3284 3285
static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
{
	u32 exit_intr_info;
3286
	u32 idt_vectoring_info;
3287 3288
	bool unblock_nmi;
	u8 vector;
3289 3290
	int type;
	bool idtv_info_valid;
3291
	u32 error;
3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304

	exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
	if (cpu_has_virtual_nmis()) {
		unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
		vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
		/*
		 * SDM 3: 25.7.1.2
		 * Re-set bit "block by NMI" before VM entry if vmexit caused by
		 * a guest IRET fault.
		 */
		if (unblock_nmi && vector != DF_VECTOR)
			vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
				      GUEST_INTR_STATE_NMI);
3305 3306 3307
	} else if (unlikely(vmx->soft_vnmi_blocked))
		vmx->vnmi_blocked_time +=
			ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324

	idt_vectoring_info = vmx->idt_vectoring_info;
	idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
	vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
	type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
	if (vmx->vcpu.arch.nmi_injected) {
		/*
		 * SDM 3: 25.7.1.2
		 * Clear bit "block by NMI" before VM entry if a NMI delivery
		 * faulted.
		 */
		if (idtv_info_valid && type == INTR_TYPE_NMI_INTR)
			vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
					GUEST_INTR_STATE_NMI);
		else
			vmx->vcpu.arch.nmi_injected = false;
	}
3325
	kvm_clear_exception_queue(&vmx->vcpu);
3326 3327
	if (idtv_info_valid && (type == INTR_TYPE_HARD_EXCEPTION ||
				type == INTR_TYPE_SOFT_EXCEPTION)) {
3328 3329 3330 3331 3332 3333 3334
		if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
			error = vmcs_read32(IDT_VECTORING_ERROR_CODE);
			kvm_queue_exception_e(&vmx->vcpu, vector, error);
		} else
			kvm_queue_exception(&vmx->vcpu, vector);
		vmx->idt_vectoring_info = 0;
	}
3335 3336 3337 3338 3339
	kvm_clear_interrupt_queue(&vmx->vcpu);
	if (idtv_info_valid && type == INTR_TYPE_EXT_INTR) {
		kvm_queue_interrupt(&vmx->vcpu, vector);
		vmx->idt_vectoring_info = 0;
	}
3340 3341
}

3342 3343
static void vmx_intr_assist(struct kvm_vcpu *vcpu)
{
3344 3345
	update_tpr_threshold(vcpu);

3346 3347
	vmx_update_window_states(vcpu);

3348 3349 3350 3351 3352
	if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
		vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
				GUEST_INTR_STATE_STI |
				GUEST_INTR_STATE_MOV_SS);

3353 3354 3355 3356 3357 3358 3359 3360
	if (vcpu->arch.nmi_pending && !vcpu->arch.nmi_injected) {
		if (vcpu->arch.interrupt.pending) {
			enable_nmi_window(vcpu);
		} else if (vcpu->arch.nmi_window_open) {
			vcpu->arch.nmi_pending = false;
			vcpu->arch.nmi_injected = true;
		} else {
			enable_nmi_window(vcpu);
3361 3362 3363
			return;
		}
	}
3364 3365 3366 3367 3368 3369 3370 3371
	if (vcpu->arch.nmi_injected) {
		vmx_inject_nmi(vcpu);
		if (vcpu->arch.nmi_pending)
			enable_nmi_window(vcpu);
		else if (kvm_cpu_has_interrupt(vcpu))
			enable_irq_window(vcpu);
		return;
	}
3372
	if (!vcpu->arch.interrupt.pending && kvm_cpu_has_interrupt(vcpu)) {
3373
		if (vcpu->arch.interrupt_window_open)
3374 3375 3376 3377 3378 3379
			kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu));
		else
			enable_irq_window(vcpu);
	}
	if (vcpu->arch.interrupt.pending) {
		vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
3380 3381
		if (kvm_cpu_has_interrupt(vcpu))
			enable_irq_window(vcpu);
3382
	}
3383 3384
}

3385 3386 3387 3388 3389 3390 3391 3392 3393
/*
 * Failure to inject an interrupt should give us the information
 * in IDT_VECTORING_INFO_FIELD.  However, if the failure occurs
 * when fetching the interrupt redirection bitmap in the real-mode
 * tss, this doesn't happen.  So we do it ourselves.
 */
static void fixup_rmode_irq(struct vcpu_vmx *vmx)
{
	vmx->rmode.irq.pending = 0;
3394
	if (kvm_rip_read(&vmx->vcpu) + 1 != vmx->rmode.irq.rip)
3395
		return;
3396
	kvm_rip_write(&vmx->vcpu, vmx->rmode.irq.rip);
3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407
	if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) {
		vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK;
		vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR;
		return;
	}
	vmx->idt_vectoring_info =
		VECTORING_INFO_VALID_MASK
		| INTR_TYPE_EXT_INTR
		| vmx->rmode.irq.vector;
}

3408 3409 3410 3411 3412 3413 3414 3415
#ifdef CONFIG_X86_64
#define R "r"
#define Q "q"
#else
#define R "e"
#define Q "l"
#endif

3416
static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
A
Avi Kivity 已提交
3417
{
3418
	struct vcpu_vmx *vmx = to_vmx(vcpu);
3419
	u32 intr_info;
3420

3421 3422 3423 3424
	/* Record the guest's net vcpu time for enforced NMI injections. */
	if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
		vmx->entry_time = ktime_get();

3425 3426 3427 3428 3429 3430
	/* Handle invalid guest state instead of entering VMX */
	if (vmx->emulation_required && emulate_invalid_guest_state) {
		handle_invalid_guest_state(vcpu, kvm_run);
		return;
	}

3431 3432 3433 3434 3435
	if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
		vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
	if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
		vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);

3436 3437 3438 3439 3440
	/*
	 * Loading guest fpu may have cleared host cr0.ts
	 */
	vmcs_writel(HOST_CR0, read_cr0());

3441 3442
	set_debugreg(vcpu->arch.dr6, 6);

M
Mike Day 已提交
3443
	asm(
A
Avi Kivity 已提交
3444
		/* Store host registers */
3445 3446
		"push %%"R"dx; push %%"R"bp;"
		"push %%"R"cx \n\t"
3447 3448 3449
		"cmp %%"R"sp, %c[host_rsp](%0) \n\t"
		"je 1f \n\t"
		"mov %%"R"sp, %c[host_rsp](%0) \n\t"
3450
		__ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
3451
		"1: \n\t"
A
Avi Kivity 已提交
3452
		/* Check if vmlaunch of vmresume is needed */
3453
		"cmpl $0, %c[launched](%0) \n\t"
A
Avi Kivity 已提交
3454
		/* Load guest registers.  Don't clobber flags. */
3455 3456 3457 3458 3459 3460 3461 3462
		"mov %c[cr2](%0), %%"R"ax \n\t"
		"mov %%"R"ax, %%cr2 \n\t"
		"mov %c[rax](%0), %%"R"ax \n\t"
		"mov %c[rbx](%0), %%"R"bx \n\t"
		"mov %c[rdx](%0), %%"R"dx \n\t"
		"mov %c[rsi](%0), %%"R"si \n\t"
		"mov %c[rdi](%0), %%"R"di \n\t"
		"mov %c[rbp](%0), %%"R"bp \n\t"
3463
#ifdef CONFIG_X86_64
3464 3465 3466 3467 3468 3469 3470 3471
		"mov %c[r8](%0),  %%r8  \n\t"
		"mov %c[r9](%0),  %%r9  \n\t"
		"mov %c[r10](%0), %%r10 \n\t"
		"mov %c[r11](%0), %%r11 \n\t"
		"mov %c[r12](%0), %%r12 \n\t"
		"mov %c[r13](%0), %%r13 \n\t"
		"mov %c[r14](%0), %%r14 \n\t"
		"mov %c[r15](%0), %%r15 \n\t"
A
Avi Kivity 已提交
3472
#endif
3473 3474
		"mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */

A
Avi Kivity 已提交
3475
		/* Enter guest mode */
3476
		"jne .Llaunched \n\t"
3477
		__ex(ASM_VMX_VMLAUNCH) "\n\t"
3478
		"jmp .Lkvm_vmx_return \n\t"
3479
		".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
3480
		".Lkvm_vmx_return: "
A
Avi Kivity 已提交
3481
		/* Save guest registers, load host registers, keep flags */
3482 3483 3484 3485 3486 3487 3488 3489
		"xchg %0,     (%%"R"sp) \n\t"
		"mov %%"R"ax, %c[rax](%0) \n\t"
		"mov %%"R"bx, %c[rbx](%0) \n\t"
		"push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
		"mov %%"R"dx, %c[rdx](%0) \n\t"
		"mov %%"R"si, %c[rsi](%0) \n\t"
		"mov %%"R"di, %c[rdi](%0) \n\t"
		"mov %%"R"bp, %c[rbp](%0) \n\t"
3490
#ifdef CONFIG_X86_64
3491 3492 3493 3494 3495 3496 3497 3498
		"mov %%r8,  %c[r8](%0) \n\t"
		"mov %%r9,  %c[r9](%0) \n\t"
		"mov %%r10, %c[r10](%0) \n\t"
		"mov %%r11, %c[r11](%0) \n\t"
		"mov %%r12, %c[r12](%0) \n\t"
		"mov %%r13, %c[r13](%0) \n\t"
		"mov %%r14, %c[r14](%0) \n\t"
		"mov %%r15, %c[r15](%0) \n\t"
A
Avi Kivity 已提交
3499
#endif
3500 3501 3502 3503
		"mov %%cr2, %%"R"ax   \n\t"
		"mov %%"R"ax, %c[cr2](%0) \n\t"

		"pop  %%"R"bp; pop  %%"R"bp; pop  %%"R"dx \n\t"
3504 3505 3506 3507
		"setbe %c[fail](%0) \n\t"
	      : : "c"(vmx), "d"((unsigned long)HOST_RSP),
		[launched]"i"(offsetof(struct vcpu_vmx, launched)),
		[fail]"i"(offsetof(struct vcpu_vmx, fail)),
3508
		[host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
3509 3510 3511 3512 3513 3514 3515
		[rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
		[rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
		[rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
		[rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
		[rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
		[rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
		[rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
3516
#ifdef CONFIG_X86_64
3517 3518 3519 3520 3521 3522 3523 3524
		[r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
		[r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
		[r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
		[r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
		[r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
		[r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
		[r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
		[r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
A
Avi Kivity 已提交
3525
#endif
3526
		[cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
3527
	      : "cc", "memory"
3528
		, R"bx", R"di", R"si"
3529 3530 3531 3532
#ifdef CONFIG_X86_64
		, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
#endif
	      );
A
Avi Kivity 已提交
3533

3534 3535 3536
	vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP));
	vcpu->arch.regs_dirty = 0;

3537 3538
	get_debugreg(vcpu->arch.dr6, 6);

3539
	vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
3540 3541
	if (vmx->rmode.irq.pending)
		fixup_rmode_irq(vmx);
3542

3543
	vmx_update_window_states(vcpu);
A
Avi Kivity 已提交
3544

M
Mike Day 已提交
3545
	asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
3546
	vmx->launched = 1;
3547 3548 3549 3550

	intr_info = vmcs_read32(VM_EXIT_INTR_INFO);

	/* We need to handle NMIs before interrupts are enabled */
3551
	if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
3552
	    (intr_info & INTR_INFO_VALID_MASK)) {
F
Feng (Eric) Liu 已提交
3553
		KVMTRACE_0D(NMI, vcpu, handler);
3554
		asm("int $2");
F
Feng (Eric) Liu 已提交
3555
	}
3556 3557

	vmx_complete_interrupts(vmx);
A
Avi Kivity 已提交
3558 3559
}

3560 3561 3562
#undef R
#undef Q

A
Avi Kivity 已提交
3563 3564
static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
{
3565 3566 3567
	struct vcpu_vmx *vmx = to_vmx(vcpu);

	if (vmx->vmcs) {
3568
		vcpu_clear(vmx);
3569 3570
		free_vmcs(vmx->vmcs);
		vmx->vmcs = NULL;
A
Avi Kivity 已提交
3571 3572 3573 3574 3575
	}
}

static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
{
R
Rusty Russell 已提交
3576 3577
	struct vcpu_vmx *vmx = to_vmx(vcpu);

3578 3579 3580 3581
	spin_lock(&vmx_vpid_lock);
	if (vmx->vpid != 0)
		__clear_bit(vmx->vpid, vmx_vpid_bitmap);
	spin_unlock(&vmx_vpid_lock);
A
Avi Kivity 已提交
3582
	vmx_free_vmcs(vcpu);
R
Rusty Russell 已提交
3583 3584 3585
	kfree(vmx->host_msrs);
	kfree(vmx->guest_msrs);
	kvm_vcpu_uninit(vcpu);
3586
	kmem_cache_free(kvm_vcpu_cache, vmx);
A
Avi Kivity 已提交
3587 3588
}

R
Rusty Russell 已提交
3589
static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
3590
{
R
Rusty Russell 已提交
3591
	int err;
3592
	struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
3593
	int cpu;
A
Avi Kivity 已提交
3594

3595
	if (!vmx)
R
Rusty Russell 已提交
3596 3597
		return ERR_PTR(-ENOMEM);

3598 3599
	allocate_vpid(vmx);

R
Rusty Russell 已提交
3600 3601 3602
	err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
	if (err)
		goto free_vcpu;
3603

3604
	vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
R
Rusty Russell 已提交
3605 3606 3607 3608
	if (!vmx->guest_msrs) {
		err = -ENOMEM;
		goto uninit_vcpu;
	}
3609

3610 3611
	vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!vmx->host_msrs)
R
Rusty Russell 已提交
3612
		goto free_guest_msrs;
3613

3614 3615
	vmx->vmcs = alloc_vmcs();
	if (!vmx->vmcs)
R
Rusty Russell 已提交
3616
		goto free_msrs;
3617 3618 3619

	vmcs_clear(vmx->vmcs);

3620 3621
	cpu = get_cpu();
	vmx_vcpu_load(&vmx->vcpu, cpu);
R
Rusty Russell 已提交
3622
	err = vmx_vcpu_setup(vmx);
R
Rusty Russell 已提交
3623
	vmx_vcpu_put(&vmx->vcpu);
3624
	put_cpu();
R
Rusty Russell 已提交
3625 3626
	if (err)
		goto free_vmcs;
3627 3628 3629
	if (vm_need_virtualize_apic_accesses(kvm))
		if (alloc_apic_access_page(kvm) != 0)
			goto free_vmcs;
R
Rusty Russell 已提交
3630

3631 3632 3633 3634
	if (vm_need_ept())
		if (alloc_identity_pagetable(kvm) != 0)
			goto free_vmcs;

R
Rusty Russell 已提交
3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645
	return &vmx->vcpu;

free_vmcs:
	free_vmcs(vmx->vmcs);
free_msrs:
	kfree(vmx->host_msrs);
free_guest_msrs:
	kfree(vmx->guest_msrs);
uninit_vcpu:
	kvm_vcpu_uninit(&vmx->vcpu);
free_vcpu:
3646
	kmem_cache_free(kvm_vcpu_cache, vmx);
R
Rusty Russell 已提交
3647
	return ERR_PTR(err);
A
Avi Kivity 已提交
3648 3649
}

Y
Yang, Sheng 已提交
3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663
static void __init vmx_check_processor_compat(void *rtn)
{
	struct vmcs_config vmcs_conf;

	*(int *)rtn = 0;
	if (setup_vmcs_config(&vmcs_conf) < 0)
		*(int *)rtn = -EIO;
	if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
		printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
				smp_processor_id());
		*(int *)rtn = -EIO;
	}
}

3664 3665 3666 3667 3668
static int get_ept_level(void)
{
	return VMX_EPT_DEFAULT_GAW + 1;
}

S
Sheng Yang 已提交
3669 3670 3671 3672 3673
static int vmx_get_mt_mask_shift(void)
{
	return VMX_EPT_MT_EPTE_SHIFT;
}

3674
static struct kvm_x86_ops vmx_x86_ops = {
A
Avi Kivity 已提交
3675 3676 3677 3678
	.cpu_has_kvm_support = cpu_has_kvm_support,
	.disabled_by_bios = vmx_disabled_by_bios,
	.hardware_setup = hardware_setup,
	.hardware_unsetup = hardware_unsetup,
Y
Yang, Sheng 已提交
3679
	.check_processor_compatibility = vmx_check_processor_compat,
A
Avi Kivity 已提交
3680 3681
	.hardware_enable = hardware_enable,
	.hardware_disable = hardware_disable,
3682
	.cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses,
A
Avi Kivity 已提交
3683 3684 3685

	.vcpu_create = vmx_create_vcpu,
	.vcpu_free = vmx_free_vcpu,
3686
	.vcpu_reset = vmx_vcpu_reset,
A
Avi Kivity 已提交
3687

3688
	.prepare_guest_switch = vmx_save_host_state,
A
Avi Kivity 已提交
3689 3690 3691 3692 3693 3694 3695 3696 3697
	.vcpu_load = vmx_vcpu_load,
	.vcpu_put = vmx_vcpu_put,

	.set_guest_debug = set_guest_debug,
	.get_msr = vmx_get_msr,
	.set_msr = vmx_set_msr,
	.get_segment_base = vmx_get_segment_base,
	.get_segment = vmx_get_segment,
	.set_segment = vmx_set_segment,
3698
	.get_cpl = vmx_get_cpl,
A
Avi Kivity 已提交
3699
	.get_cs_db_l_bits = vmx_get_cs_db_l_bits,
3700
	.decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
A
Avi Kivity 已提交
3701 3702 3703 3704 3705 3706 3707 3708
	.set_cr0 = vmx_set_cr0,
	.set_cr3 = vmx_set_cr3,
	.set_cr4 = vmx_set_cr4,
	.set_efer = vmx_set_efer,
	.get_idt = vmx_get_idt,
	.set_idt = vmx_set_idt,
	.get_gdt = vmx_get_gdt,
	.set_gdt = vmx_set_gdt,
3709
	.cache_reg = vmx_cache_reg,
A
Avi Kivity 已提交
3710 3711 3712 3713 3714 3715
	.get_rflags = vmx_get_rflags,
	.set_rflags = vmx_set_rflags,

	.tlb_flush = vmx_flush_tlb,

	.run = vmx_vcpu_run,
3716
	.handle_exit = kvm_handle_exit,
A
Avi Kivity 已提交
3717
	.skip_emulated_instruction = skip_emulated_instruction,
I
Ingo Molnar 已提交
3718
	.patch_hypercall = vmx_patch_hypercall,
E
Eddie Dong 已提交
3719 3720
	.get_irq = vmx_get_irq,
	.set_irq = vmx_inject_irq,
3721 3722
	.queue_exception = vmx_queue_exception,
	.exception_injected = vmx_exception_injected,
3723 3724
	.inject_pending_irq = vmx_intr_assist,
	.inject_pending_vectors = do_interrupt_requests,
3725 3726

	.set_tss_addr = vmx_set_tss_addr,
3727
	.get_tdp_level = get_ept_level,
S
Sheng Yang 已提交
3728
	.get_mt_mask_shift = vmx_get_mt_mask_shift,
A
Avi Kivity 已提交
3729 3730 3731 3732
};

static int __init vmx_init(void)
{
S
Sheng Yang 已提交
3733
	void *va;
3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745
	int r;

	vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
	if (!vmx_io_bitmap_a)
		return -ENOMEM;

	vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
	if (!vmx_io_bitmap_b) {
		r = -ENOMEM;
		goto out;
	}

S
Sheng Yang 已提交
3746 3747 3748 3749 3750 3751
	vmx_msr_bitmap = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
	if (!vmx_msr_bitmap) {
		r = -ENOMEM;
		goto out1;
	}

3752 3753 3754 3755
	/*
	 * Allow direct access to the PC debug port (it is often used for I/O
	 * delays, but the vmexits simply slow things down).
	 */
S
Sheng Yang 已提交
3756 3757 3758
	va = kmap(vmx_io_bitmap_a);
	memset(va, 0xff, PAGE_SIZE);
	clear_bit(0x80, va);
3759
	kunmap(vmx_io_bitmap_a);
3760

S
Sheng Yang 已提交
3761 3762
	va = kmap(vmx_io_bitmap_b);
	memset(va, 0xff, PAGE_SIZE);
3763
	kunmap(vmx_io_bitmap_b);
3764

S
Sheng Yang 已提交
3765 3766 3767 3768
	va = kmap(vmx_msr_bitmap);
	memset(va, 0xff, PAGE_SIZE);
	kunmap(vmx_msr_bitmap);

3769 3770
	set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */

3771
	r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
3772
	if (r)
S
Sheng Yang 已提交
3773 3774 3775 3776 3777 3778 3779
		goto out2;

	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_FS_BASE);
	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_GS_BASE);
	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_CS);
	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_ESP);
	vmx_disable_intercept_for_msr(vmx_msr_bitmap, MSR_IA32_SYSENTER_EIP);
3780

3781
	if (vm_need_ept()) {
3782
		bypass_guest_pf = 0;
3783
		kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
3784
			VMX_EPT_WRITABLE_MASK);
3785
		kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
S
Sheng Yang 已提交
3786 3787
				VMX_EPT_EXECUTABLE_MASK,
				VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
3788 3789 3790
		kvm_enable_tdp();
	} else
		kvm_disable_tdp();
3791

3792 3793 3794
	if (bypass_guest_pf)
		kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);

3795 3796
	ept_sync_global();

3797 3798
	return 0;

S
Sheng Yang 已提交
3799 3800
out2:
	__free_page(vmx_msr_bitmap);
3801 3802 3803 3804 3805
out1:
	__free_page(vmx_io_bitmap_b);
out:
	__free_page(vmx_io_bitmap_a);
	return r;
A
Avi Kivity 已提交
3806 3807 3808 3809
}

static void __exit vmx_exit(void)
{
S
Sheng Yang 已提交
3810
	__free_page(vmx_msr_bitmap);
3811 3812 3813
	__free_page(vmx_io_bitmap_b);
	__free_page(vmx_io_bitmap_a);

3814
	kvm_exit();
A
Avi Kivity 已提交
3815 3816 3817 3818
}

module_init(vmx_init)
module_exit(vmx_exit)