vmx.c 85.1 KB
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/*
 * 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.
 *
 */

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#include "irq.h"
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#include "vmx.h"
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#include "mmu.h"
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#include <linux/kvm_host.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
#include <linux/highmem.h>
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#include <linux/sched.h>
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#include <linux/moduleparam.h>
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#include <asm/io.h>
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#include <asm/desc.h>
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#define __ex(x) __kvm_handle_fault_on_reboot(x)

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MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");

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

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

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

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static int enable_ept = 1;
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module_param(enable_ept, bool, 0);

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struct vmcs {
	u32 revision_id;
	u32 abort;
	char data[0];
};

struct vcpu_vmx {
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	struct kvm_vcpu       vcpu;
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	struct list_head      local_vcpus_link;
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	int                   launched;
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	u8                    fail;
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	u32                   idt_vectoring_info;
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	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;
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		int           gs_ldt_reload_needed;
		int           fs_reload_needed;
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		int           guest_efer_loaded;
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	} host_state;
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	struct {
		struct {
			bool pending;
			u8 vector;
			unsigned rip;
		} irq;
	} rmode;
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	int vpid;
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};

static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
{
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	return container_of(vcpu, struct vcpu_vmx, vcpu);
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}

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static int init_rmode(struct kvm *kvm);
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static u64 construct_eptp(unsigned long root_hpa);
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static DEFINE_PER_CPU(struct vmcs *, vmxarea);
static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
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static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu);
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static struct page *vmx_io_bitmap_a;
static struct page *vmx_io_bitmap_b;
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static struct page *vmx_msr_bitmap;
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static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
static DEFINE_SPINLOCK(vmx_vpid_lock);

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static struct vmcs_config {
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	int size;
	int order;
	u32 revision_id;
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	u32 pin_based_exec_ctrl;
	u32 cpu_based_exec_ctrl;
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	u32 cpu_based_2nd_exec_ctrl;
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	u32 vmexit_ctrl;
	u32 vmentry_ctrl;
} vmcs_config;
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struct vmx_capability {
	u32 ept;
	u32 vpid;
} vmx_capability;

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#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),
};

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/*
 * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
 * away by decrementing the array size.
 */
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static const u32 vmx_msr_index[] = {
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#ifdef CONFIG_X86_64
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	MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE,
#endif
	MSR_EFER, MSR_K6_STAR,
};
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#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
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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);
}

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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)) ==
		(INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
}

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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)) ==
		(INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
}

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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)) ==
		(INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
}

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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);
}

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static inline int cpu_has_vmx_msr_bitmap(void)
{
	return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS);
}

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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)));
}

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static inline int cpu_has_secondary_exec_ctrls(void)
{
	return (vmcs_config.cpu_based_exec_ctrl &
		CPU_BASED_ACTIVATE_SECONDARY_CONTROLS);
}

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static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
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{
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	return flexpriority_enabled
		&& (vmcs_config.cpu_based_2nd_exec_ctrl &
		    SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
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}

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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);
}

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static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
{
	return ((cpu_has_vmx_virtualize_apic_accesses()) &&
		(irqchip_in_kernel(kvm)));
}

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static inline int cpu_has_vmx_vpid(void)
{
	return (vmcs_config.cpu_based_2nd_exec_ctrl &
		SECONDARY_EXEC_ENABLE_VPID);
}

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static inline int cpu_has_virtual_nmis(void)
{
	return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
}

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static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
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{
	int i;

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	for (i = 0; i < vmx->nmsrs; ++i)
		if (vmx->guest_msrs[i].index == msr)
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			return i;
	return -1;
}

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static inline void __invvpid(int ext, u16 vpid, gva_t gva)
{
    struct {
	u64 vpid : 16;
	u64 rsvd : 48;
	u64 gva;
    } operand = { vpid, 0, gva };

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

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static inline void __invept(int ext, u64 eptp, gpa_t gpa)
{
	struct {
		u64 eptp, gpa;
	} operand = {eptp, gpa};

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

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static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
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{
	int i;

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	i = __find_msr_index(vmx, msr);
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	if (i >= 0)
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		return &vmx->guest_msrs[i];
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	return NULL;
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}

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static void vmcs_clear(struct vmcs *vmcs)
{
	u64 phys_addr = __pa(vmcs);
	u8 error;

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	asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
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		      : "=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)
{
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	struct vcpu_vmx *vmx = arg;
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	int cpu = raw_smp_processor_id();
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	if (vmx->vcpu.cpu == cpu)
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		vmcs_clear(vmx->vmcs);
	if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
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		per_cpu(current_vmcs, cpu) = NULL;
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	rdtscll(vmx->vcpu.arch.host_tsc);
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	list_del(&vmx->local_vcpus_link);
	vmx->vcpu.cpu = -1;
	vmx->launched = 0;
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}

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static void vcpu_clear(struct vcpu_vmx *vmx)
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{
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	if (vmx->vcpu.cpu == -1)
		return;
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	smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
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}

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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);
}

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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);
	}
}

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static unsigned long vmcs_readl(unsigned long field)
{
	unsigned long value;

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	asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
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		      : "=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)
{
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#ifdef CONFIG_X86_64
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	return vmcs_readl(field);
#else
	return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
#endif
}

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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();
}

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static void vmcs_writel(unsigned long field, unsigned long value)
{
	u8 error;

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	asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
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		       : "=q"(error) : "a"(value), "d"(field) : "cc");
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	if (unlikely(error))
		vmwrite_error(field, value);
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}

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);
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#ifndef CONFIG_X86_64
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	asm volatile ("");
	vmcs_writel(field+1, value >> 32);
#endif
}

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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);
}

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static void update_exception_bitmap(struct kvm_vcpu *vcpu)
{
	u32 eb;

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	eb = (1u << PF_VECTOR) | (1u << UD_VECTOR);
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	if (!vcpu->fpu_active)
		eb |= 1u << NM_VECTOR;
	if (vcpu->guest_debug.enabled)
		eb |= 1u << 1;
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	if (vcpu->arch.rmode.active)
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		eb = ~0;
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	if (vm_need_ept())
		eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
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	vmcs_write32(EXCEPTION_BITMAP, eb);
}

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static void reload_tss(void)
{
	/*
	 * VT restores TR but not its size.  Useless.
	 */
	struct descriptor_table gdt;
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	struct desc_struct *descs;
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	kvm_get_gdt(&gdt);
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	descs = (void *)gdt.base;
	descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
	load_TR_desc();
}

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static void load_transition_efer(struct vcpu_vmx *vmx)
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{
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	int efer_offset = vmx->msr_offset_efer;
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	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;
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	vmx->host_state.guest_efer_loaded = 1;
	guest_efer &= ~ignore_bits;
	guest_efer |= host_efer & ignore_bits;
	wrmsrl(MSR_EFER, guest_efer);
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	vmx->vcpu.stat.efer_reload++;
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}

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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);
	}
}

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static void vmx_save_host_state(struct kvm_vcpu *vcpu)
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{
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	struct vcpu_vmx *vmx = to_vmx(vcpu);

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	if (vmx->host_state.loaded)
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		return;

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	vmx->host_state.loaded = 1;
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	/*
	 * Set host fs and gs selectors.  Unfortunately, 22.2.3 does not
	 * allow segment selectors with cpl > 0 or ti == 1.
	 */
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	vmx->host_state.ldt_sel = kvm_read_ldt();
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	vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
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	vmx->host_state.fs_sel = kvm_read_fs();
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	if (!(vmx->host_state.fs_sel & 7)) {
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		vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
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		vmx->host_state.fs_reload_needed = 0;
	} else {
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		vmcs_write16(HOST_FS_SELECTOR, 0);
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		vmx->host_state.fs_reload_needed = 1;
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	}
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	vmx->host_state.gs_sel = kvm_read_gs();
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	if (!(vmx->host_state.gs_sel & 7))
		vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
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	else {
		vmcs_write16(HOST_GS_SELECTOR, 0);
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		vmx->host_state.gs_ldt_reload_needed = 1;
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	}

#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
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	vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
	vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
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#endif
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#ifdef CONFIG_X86_64
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	if (is_long_mode(&vmx->vcpu))
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		save_msrs(vmx->host_msrs +
			  vmx->msr_offset_kernel_gs_base, 1);
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#endif
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	load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
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	load_transition_efer(vmx);
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}

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static void __vmx_load_host_state(struct vcpu_vmx *vmx)
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{
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	unsigned long flags;
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	if (!vmx->host_state.loaded)
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		return;

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	++vmx->vcpu.stat.host_state_reload;
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	vmx->host_state.loaded = 0;
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	if (vmx->host_state.fs_reload_needed)
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		kvm_load_fs(vmx->host_state.fs_sel);
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	if (vmx->host_state.gs_ldt_reload_needed) {
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		kvm_load_ldt(vmx->host_state.ldt_sel);
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		/*
		 * If we have to reload gs, we must take care to
		 * preserve our gs base.
		 */
596
		local_irq_save(flags);
597
		kvm_load_gs(vmx->host_state.gs_sel);
598 599 600
#ifdef CONFIG_X86_64
		wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
#endif
601
		local_irq_restore(flags);
602
	}
603
	reload_tss();
604 605
	save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
	load_msrs(vmx->host_msrs, vmx->save_nmsrs);
606
	reload_host_efer(vmx);
607 608
}

609 610 611 612 613 614 615
static void vmx_load_host_state(struct vcpu_vmx *vmx)
{
	preempt_disable();
	__vmx_load_host_state(vmx);
	preempt_enable();
}

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/*
 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
 * vcpu mutex is already taken.
 */
620
static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
622 623
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	u64 phys_addr = __pa(vmx->vmcs);
624
	u64 tsc_this, delta, new_offset;
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626
	if (vcpu->cpu != cpu) {
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		vcpu_clear(vmx);
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		kvm_migrate_timers(vcpu);
629
		vpid_sync_vcpu_all(vmx);
630 631 632 633
		local_irq_disable();
		list_add(&vmx->local_vcpus_link,
			 &per_cpu(vcpus_on_cpu, cpu));
		local_irq_enable();
634
	}
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636
	if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
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		u8 error;

639
		per_cpu(current_vmcs, cpu) = vmx->vmcs;
640
		asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
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			      : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
			      : "cc");
		if (error)
			printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
645
			       vmx->vmcs, phys_addr);
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	}

	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.
		 */
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		vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
		kvm_get_gdt(&dt);
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		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 */
663 664 665 666 667

		/*
		 * Make sure the time stamp counter is monotonous.
		 */
		rdtscll(tsc_this);
668 669 670 671 672
		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);
		}
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	}
}

static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
{
678
	__vmx_load_host_state(to_vmx(vcpu));
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}

681 682 683 684 685
static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
{
	if (vcpu->fpu_active)
		return;
	vcpu->fpu_active = 1;
686
	vmcs_clear_bits(GUEST_CR0, X86_CR0_TS);
687
	if (vcpu->arch.cr0 & X86_CR0_TS)
688
		vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
689 690 691 692 693 694 695 696
	update_exception_bitmap(vcpu);
}

static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
{
	if (!vcpu->fpu_active)
		return;
	vcpu->fpu_active = 0;
697
	vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
698 699 700
	update_exception_bitmap(vcpu);
}

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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)
{
708
	if (vcpu->arch.rmode.active)
709
		rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
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	vmcs_writel(GUEST_RFLAGS, rflags);
}

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

	rip = vmcs_readl(GUEST_RIP);
	rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
	vmcs_writel(GUEST_RIP, rip);

	/*
	 * 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);
730
	vcpu->arch.interrupt_window_open = 1;
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}

733 734 735 736 737
static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
				bool has_error_code, u32 error_code)
{
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
		     nr | INTR_TYPE_EXCEPTION
738
		     | (has_error_code ? INTR_INFO_DELIVER_CODE_MASK : 0)
739 740 741 742 743 744 745 746 747 748 749 750
		     | INTR_INFO_VALID_MASK);
	if (has_error_code)
		vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
}

static bool vmx_exception_injected(struct kvm_vcpu *vcpu)
{
	struct vcpu_vmx *vmx = to_vmx(vcpu);

	return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
}

751 752 753
/*
 * Swap MSR entry in host/guest MSR entry array.
 */
754
#ifdef CONFIG_X86_64
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static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
756
{
757 758 759 760 761 762 763 764
	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;
765
}
766
#endif
767

768 769 770 771 772
/*
 * 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.
 */
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static void setup_msrs(struct vcpu_vmx *vmx)
774
{
775
	int save_nmsrs;
776

777
	vmx_load_host_state(vmx);
778 779
	save_nmsrs = 0;
#ifdef CONFIG_X86_64
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	if (is_long_mode(&vmx->vcpu)) {
781 782
		int index;

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		index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
784
		if (index >= 0)
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			move_msr_up(vmx, index, save_nmsrs++);
		index = __find_msr_index(vmx, MSR_LSTAR);
787
		if (index >= 0)
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			move_msr_up(vmx, index, save_nmsrs++);
		index = __find_msr_index(vmx, MSR_CSTAR);
790
		if (index >= 0)
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			move_msr_up(vmx, index, save_nmsrs++);
		index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
793
		if (index >= 0)
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			move_msr_up(vmx, index, save_nmsrs++);
795 796 797 798
		/*
		 * MSR_K6_STAR is only needed on long mode guests, and only
		 * if efer.sce is enabled.
		 */
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		index = __find_msr_index(vmx, MSR_K6_STAR);
800
		if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE))
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			move_msr_up(vmx, index, save_nmsrs++);
802 803
	}
#endif
804
	vmx->save_nmsrs = save_nmsrs;
805

806
#ifdef CONFIG_X86_64
807
	vmx->msr_offset_kernel_gs_base =
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		__find_msr_index(vmx, MSR_KERNEL_GS_BASE);
809
#endif
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	vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER);
811 812
}

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/*
 * 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
 */
static void guest_write_tsc(u64 guest_tsc)
{
	u64 host_tsc;

	rdtscll(host_tsc);
	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;
846
	struct kvm_msr_entry *msr;
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	if (!pdata) {
		printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
		return -EINVAL;
	}

	switch (msr_index) {
854
#ifdef CONFIG_X86_64
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	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:
862
		return kvm_get_msr_common(vcpu, msr_index, pdata);
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#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:
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		data = vmcs_readl(GUEST_SYSENTER_EIP);
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		break;
	case MSR_IA32_SYSENTER_ESP:
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		data = vmcs_readl(GUEST_SYSENTER_ESP);
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		break;
	default:
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		msr = find_msr_entry(to_vmx(vcpu), msr_index);
878 879 880
		if (msr) {
			data = msr->data;
			break;
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		}
882
		return kvm_get_msr_common(vcpu, msr_index, pdata);
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	}

	*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)
{
896 897
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	struct kvm_msr_entry *msr;
898 899
	int ret = 0;

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	switch (msr_index) {
901
#ifdef CONFIG_X86_64
902
	case MSR_EFER:
903
		vmx_load_host_state(vmx);
904 905
		ret = kvm_set_msr_common(vcpu, msr_index, data);
		break;
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	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:
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		vmcs_writel(GUEST_SYSENTER_EIP, data);
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		break;
	case MSR_IA32_SYSENTER_ESP:
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		vmcs_writel(GUEST_SYSENTER_ESP, data);
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		break;
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	case MSR_IA32_TIME_STAMP_COUNTER:
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		guest_write_tsc(data);
924 925 926 927 928 929 930 931 932 933 934 935
		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);

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		break;
	default:
938
		vmx_load_host_state(vmx);
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		msr = find_msr_entry(vmx, msr_index);
940 941 942
		if (msr) {
			msr->data = data;
			break;
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		}
944
		ret = kvm_set_msr_common(vcpu, msr_index, data);
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	}

947
	return ret;
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}

/*
 * Sync the rsp and rip registers into the vcpu structure.  This allows
952
 * registers to be accessed by indexing vcpu->arch.regs.
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 */
static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu)
{
956 957
	vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
	vcpu->arch.rip = vmcs_readl(GUEST_RIP);
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}

/*
 * Syncs rsp and rip back into the vmcs.  Should be called after possible
 * modification.
 */
static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu)
{
966 967
	vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
	vmcs_writel(GUEST_RIP, vcpu->arch.rip);
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}

static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
{
	unsigned long dr7 = 0x400;
	int old_singlestep;

	old_singlestep = vcpu->guest_debug.singlestep;

	vcpu->guest_debug.enabled = dbg->enabled;
	if (vcpu->guest_debug.enabled) {
		int i;

		dr7 |= 0x200;  /* exact */
		for (i = 0; i < 4; ++i) {
			if (!dbg->breakpoints[i].enabled)
				continue;
			vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
			dr7 |= 2 << (i*2);    /* global enable */
			dr7 |= 0 << (i*4+16); /* execution breakpoint */
		}

		vcpu->guest_debug.singlestep = dbg->singlestep;
991
	} else
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		vcpu->guest_debug.singlestep = 0;

	if (old_singlestep && !vcpu->guest_debug.singlestep) {
		unsigned long flags;

		flags = vmcs_readl(GUEST_RFLAGS);
		flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
		vmcs_writel(GUEST_RFLAGS, flags);
	}

1002
	update_exception_bitmap(vcpu);
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	vmcs_writel(GUEST_DR7, dr7);

	return 0;
}

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static int vmx_get_irq(struct kvm_vcpu *vcpu)
{
1010
	struct vcpu_vmx *vmx = to_vmx(vcpu);
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	u32 idtv_info_field;

1013
	idtv_info_field = vmx->idt_vectoring_info;
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	if (idtv_info_field & INTR_INFO_VALID_MASK) {
		if (is_external_interrupt(idtv_info_field))
			return idtv_info_field & VECTORING_INFO_VECTOR_MASK;
		else
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			printk(KERN_DEBUG "pending exception: not handled yet\n");
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	}
	return -1;
}

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static __init int cpu_has_kvm_support(void)
{
	unsigned long ecx = cpuid_ecx(1);
	return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
}

static __init int vmx_disabled_by_bios(void)
{
	u64 msr;

	rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
1034 1035 1036 1037
	return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED |
		       MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
	    == MSR_IA32_FEATURE_CONTROL_LOCKED;
	/* locked but not enabled */
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}

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static void hardware_enable(void *garbage)
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{
	int cpu = raw_smp_processor_id();
	u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
	u64 old;

1046
	INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu));
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	rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
1048 1049 1050 1051
	if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED |
		    MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
	    != (MSR_IA32_FEATURE_CONTROL_LOCKED |
		MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
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		/* enable and lock */
1053 1054 1055
		wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
		       MSR_IA32_FEATURE_CONTROL_LOCKED |
		       MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED);
1056
	write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
1057 1058
	asm volatile (ASM_VMX_VMXON_RAX
		      : : "a"(&phys_addr), "m"(phys_addr)
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		      : "memory", "cc");
}

1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
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);
}

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static void hardware_disable(void *garbage)
{
1074
	vmclear_local_vcpus();
1075
	asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
1076
	write_cr4(read_cr4() & ~X86_CR4_VMXE);
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}

1079
static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
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				      u32 msr, u32 *result)
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
{
	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)
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		return -EIO;
1093 1094 1095 1096 1097

	*result = ctl;
	return 0;
}

Y
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static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
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{
	u32 vmx_msr_low, vmx_msr_high;
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	u32 min, opt, min2, opt2;
1102 1103
	u32 _pin_based_exec_control = 0;
	u32 _cpu_based_exec_control = 0;
1104
	u32 _cpu_based_2nd_exec_control = 0;
1105 1106 1107 1108
	u32 _vmexit_control = 0;
	u32 _vmentry_control = 0;

	min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
1109
	opt = PIN_BASED_VIRTUAL_NMIS;
1110 1111
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
				&_pin_based_exec_control) < 0)
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		return -EIO;
1113 1114 1115 1116 1117 1118

	min = CPU_BASED_HLT_EXITING |
#ifdef CONFIG_X86_64
	      CPU_BASED_CR8_LOAD_EXITING |
	      CPU_BASED_CR8_STORE_EXITING |
#endif
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	      CPU_BASED_CR3_LOAD_EXITING |
	      CPU_BASED_CR3_STORE_EXITING |
1121 1122 1123
	      CPU_BASED_USE_IO_BITMAPS |
	      CPU_BASED_MOV_DR_EXITING |
	      CPU_BASED_USE_TSC_OFFSETING;
1124
	opt = CPU_BASED_TPR_SHADOW |
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	      CPU_BASED_USE_MSR_BITMAPS |
1126
	      CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
1127 1128
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
				&_cpu_based_exec_control) < 0)
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		return -EIO;
1130 1131 1132 1133 1134
#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
1135
	if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
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		min2 = 0;
		opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
1138
			SECONDARY_EXEC_WBINVD_EXITING |
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			SECONDARY_EXEC_ENABLE_VPID |
			SECONDARY_EXEC_ENABLE_EPT;
		if (adjust_vmx_controls(min2, opt2,
					MSR_IA32_VMX_PROCBASED_CTLS2,
1143 1144 1145 1146 1147 1148 1149 1150
					&_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
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	if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
		/* CR3 accesses don't need to cause VM Exits when EPT enabled */
		min &= ~(CPU_BASED_CR3_LOAD_EXITING |
			 CPU_BASED_CR3_STORE_EXITING);
		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);
	}
1161 1162 1163 1164 1165 1166 1167 1168

	min = 0;
#ifdef CONFIG_X86_64
	min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
#endif
	opt = 0;
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
				&_vmexit_control) < 0)
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		return -EIO;
1170 1171 1172 1173

	min = opt = 0;
	if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
				&_vmentry_control) < 0)
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		return -EIO;
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	rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
1177 1178 1179

	/* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
	if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
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		return -EIO;
1181 1182 1183 1184

#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
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		return -EIO;
1186 1187 1188 1189
#endif

	/* Require Write-Back (WB) memory type for VMCS accesses. */
	if (((vmx_msr_high >> 18) & 15) != 6)
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		return -EIO;
1191

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1192 1193 1194
	vmcs_conf->size = vmx_msr_high & 0x1fff;
	vmcs_conf->order = get_order(vmcs_config.size);
	vmcs_conf->revision_id = vmx_msr_low;
1195

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1196 1197
	vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
	vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
1198
	vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
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	vmcs_conf->vmexit_ctrl         = _vmexit_control;
	vmcs_conf->vmentry_ctrl        = _vmentry_control;
1201 1202

	return 0;
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}
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static struct vmcs *alloc_vmcs_cpu(int cpu)
{
	int node = cpu_to_node(cpu);
	struct page *pages;
	struct vmcs *vmcs;

1211
	pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order);
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1212 1213 1214
	if (!pages)
		return NULL;
	vmcs = page_address(pages);
1215 1216
	memset(vmcs, 0, vmcs_config.size);
	vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
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1217 1218 1219 1220 1221
	return vmcs;
}

static struct vmcs *alloc_vmcs(void)
{
1222
	return alloc_vmcs_cpu(raw_smp_processor_id());
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1223 1224 1225 1226
}

static void free_vmcs(struct vmcs *vmcs)
{
1227
	free_pages((unsigned long)vmcs, vmcs_config.order);
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1228 1229
}

1230
static void free_kvm_area(void)
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{
	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
1258 1259
	if (setup_vmcs_config(&vmcs_config) < 0)
		return -EIO;
1260 1261 1262 1263

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

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1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
	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];

1276
	if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
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1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
		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;

1292
	vcpu->arch.rmode.active = 0;
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1293

1294 1295 1296
	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);
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1297 1298

	flags = vmcs_readl(GUEST_RFLAGS);
1299
	flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM);
1300
	flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT);
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	vmcs_writel(GUEST_RFLAGS, flags);

1303 1304
	vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
			(vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
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1305 1306 1307

	update_exception_bitmap(vcpu);

1308 1309 1310 1311
	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);
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1312 1313 1314 1315 1316 1317 1318 1319 1320

	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);
}

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static gva_t rmode_tss_base(struct kvm *kvm)
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1322
{
1323
	if (!kvm->arch.tss_addr) {
1324 1325 1326 1327
		gfn_t base_gfn = kvm->memslots[0].base_gfn +
				 kvm->memslots[0].npages - 3;
		return base_gfn << PAGE_SHIFT;
	}
1328
	return kvm->arch.tss_addr;
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}

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);
1339 1340
	vmcs_write16(sf->selector, save->base >> 4);
	vmcs_write32(sf->base, save->base & 0xfffff);
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	vmcs_write32(sf->limit, 0xffff);
	vmcs_write32(sf->ar_bytes, 0xf3);
}

static void enter_rmode(struct kvm_vcpu *vcpu)
{
	unsigned long flags;

1349
	vcpu->arch.rmode.active = 1;
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1351
	vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
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	vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));

1354
	vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
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	vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);

1357
	vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
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	vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);

	flags = vmcs_readl(GUEST_RFLAGS);
1361 1362
	vcpu->arch.rmode.save_iopl
		= (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
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1364
	flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
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1365 1366

	vmcs_writel(GUEST_RFLAGS, flags);
1367
	vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
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	update_exception_bitmap(vcpu);

	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);
1375
	vmcs_write32(GUEST_CS_LIMIT, 0xffff);
1376 1377
	if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
		vmcs_writel(GUEST_CS_BASE, 0xf0000);
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	vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);

1380 1381 1382 1383
	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);
1384

1385
	kvm_mmu_reset_context(vcpu);
1386
	init_rmode(vcpu->kvm);
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}

1389
#ifdef CONFIG_X86_64
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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",
1398
		       __func__);
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		vmcs_write32(GUEST_TR_AR_BYTES,
			     (guest_tr_ar & ~AR_TYPE_MASK)
			     | AR_TYPE_BUSY_64_TSS);
	}

1404
	vcpu->arch.shadow_efer |= EFER_LMA;
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	find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME;
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	vmcs_write32(VM_ENTRY_CONTROLS,
		     vmcs_read32(VM_ENTRY_CONTROLS)
1409
		     | VM_ENTRY_IA32E_MODE);
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}

static void exit_lmode(struct kvm_vcpu *vcpu)
{
1414
	vcpu->arch.shadow_efer &= ~EFER_LMA;
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	vmcs_write32(VM_ENTRY_CONTROLS,
		     vmcs_read32(VM_ENTRY_CONTROLS)
1418
		     & ~VM_ENTRY_IA32E_MODE);
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}

#endif

1423 1424 1425
static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
{
	vpid_sync_vcpu_all(to_vmx(vcpu));
1426 1427
	if (vm_need_ept())
		ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
1428 1429
}

1430
static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
1431
{
1432 1433
	vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK;
	vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK;
1434 1435
}

1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458
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,
1459
			     vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
1460 1461 1462 1463 1464 1465 1466 1467 1468
			     (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,
1469
			     vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488
			     ~(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;
}

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static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
1491 1492 1493
	unsigned long hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) |
				KVM_VM_CR0_ALWAYS_ON;

1494 1495
	vmx_fpu_deactivate(vcpu);

1496
	if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE))
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		enter_pmode(vcpu);

1499
	if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE))
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		enter_rmode(vcpu);

1502
#ifdef CONFIG_X86_64
1503
	if (vcpu->arch.shadow_efer & EFER_LME) {
1504
		if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
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			enter_lmode(vcpu);
1506
		if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
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			exit_lmode(vcpu);
	}
#endif

1511 1512 1513
	if (vm_need_ept())
		ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);

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	vmcs_writel(CR0_READ_SHADOW, cr0);
1515
	vmcs_writel(GUEST_CR0, hw_cr0);
1516
	vcpu->arch.cr0 = cr0;
1517

1518
	if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE))
1519
		vmx_fpu_activate(vcpu);
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}

1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
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;
}

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static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{
1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
	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;
	}

1549
	vmx_flush_tlb(vcpu);
1550
	vmcs_writel(GUEST_CR3, guest_cr3);
1551
	if (vcpu->arch.cr0 & X86_CR0_PE)
1552
		vmx_fpu_deactivate(vcpu);
A
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1553 1554 1555 1556
}

static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
1557 1558 1559
	unsigned long hw_cr4 = cr4 | (vcpu->arch.rmode.active ?
		    KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);

1560
	vcpu->arch.cr4 = cr4;
1561 1562 1563 1564 1565
	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
1566 1567 1568 1569
}

static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
R
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1570 1571
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
A
Avi Kivity 已提交
1572

1573
	vcpu->arch.shadow_efer = efer;
1574 1575
	if (!msr)
		return;
A
Avi Kivity 已提交
1576 1577 1578
	if (efer & EFER_LMA) {
		vmcs_write32(VM_ENTRY_CONTROLS,
				     vmcs_read32(VM_ENTRY_CONTROLS) |
1579
				     VM_ENTRY_IA32E_MODE);
A
Avi Kivity 已提交
1580 1581 1582 1583 1584
		msr->data = efer;

	} else {
		vmcs_write32(VM_ENTRY_CONTROLS,
				     vmcs_read32(VM_ENTRY_CONTROLS) &
1585
				     ~VM_ENTRY_IA32E_MODE);
A
Avi Kivity 已提交
1586 1587 1588

		msr->data = efer & ~EFER_LME;
	}
R
Rusty Russell 已提交
1589
	setup_msrs(vmx);
A
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1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621
}

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;
}

1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635
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;
}

1636
static u32 vmx_segment_access_rights(struct kvm_segment *var)
A
Avi Kivity 已提交
1637 1638 1639
{
	u32 ar;

1640
	if (var->unusable)
A
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1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651
		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;
	}
1652 1653
	if (ar == 0) /* a 0 value means unusable */
		ar = AR_UNUSABLE_MASK;
1654 1655 1656 1657 1658 1659 1660 1661 1662 1663

	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;

1664 1665 1666 1667 1668
	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);
1669 1670 1671 1672 1673
		return;
	}
	vmcs_writel(sf->base, var->base);
	vmcs_write32(sf->limit, var->limit);
	vmcs_write16(sf->selector, var->selector);
1674
	if (vcpu->arch.rmode.active && var->s) {
1675 1676 1677 1678 1679 1680 1681 1682
		/*
		 * 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
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717
	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);
}

M
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1718
static int init_rmode_tss(struct kvm *kvm)
A
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1719 1720
{
	gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
1721
	u16 data = 0;
1722
	int ret = 0;
1723
	int r;
A
Avi Kivity 已提交
1724

1725 1726
	r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
	if (r < 0)
1727
		goto out;
1728 1729 1730
	data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
	r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16));
	if (r < 0)
1731
		goto out;
1732 1733
	r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
	if (r < 0)
1734
		goto out;
1735 1736
	r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
	if (r < 0)
1737
		goto out;
1738
	data = ~0;
1739 1740 1741
	r = kvm_write_guest_page(kvm, fn, &data,
				 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
				 sizeof(u8));
1742
	if (r < 0)
1743 1744 1745 1746 1747
		goto out;

	ret = 1;
out:
	return ret;
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1748 1749
}

1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784
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;
}

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1785 1786 1787 1788 1789 1790 1791 1792 1793 1794
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);
	vmcs_write32(sf->ar_bytes, 0x93);
}

1795 1796 1797 1798 1799
static int alloc_apic_access_page(struct kvm *kvm)
{
	struct kvm_userspace_memory_region kvm_userspace_mem;
	int r = 0;

1800
	down_write(&kvm->slots_lock);
1801
	if (kvm->arch.apic_access_page)
1802 1803 1804 1805 1806 1807 1808 1809
		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;
1810 1811

	down_read(&current->mm->mmap_sem);
1812
	kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
1813
	up_read(&current->mm->mmap_sem);
1814
out:
1815
	up_write(&kvm->slots_lock);
1816 1817 1818
	return r;
}

1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843
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;

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

1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
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);
}

1860
static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr)
S
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1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883
{
	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
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/*
 * Sets up the vmcs for emulated real mode.
 */
R
Rusty Russell 已提交
1887
static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
A
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1888 1889 1890 1891 1892 1893
{
	u32 host_sysenter_cs;
	u32 junk;
	unsigned long a;
	struct descriptor_table dt;
	int i;
1894
	unsigned long kvm_vmx_return;
1895
	u32 exec_control;
A
Avi Kivity 已提交
1896 1897

	/* I/O */
1898 1899
	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
1900

S
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1901 1902 1903
	if (cpu_has_vmx_msr_bitmap())
		vmcs_write64(MSR_BITMAP, page_to_phys(vmx_msr_bitmap));

A
Avi Kivity 已提交
1904 1905 1906
	vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */

	/* Control */
1907 1908
	vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
		vmcs_config.pin_based_exec_ctrl);
1909 1910 1911 1912 1913 1914 1915 1916 1917

	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
1918 1919 1920
	if (!vm_need_ept())
		exec_control |= CPU_BASED_CR3_STORE_EXITING |
				CPU_BASED_CR3_LOAD_EXITING;
1921
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
A
Avi Kivity 已提交
1922

1923 1924 1925 1926 1927
	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;
1928 1929
		if (vmx->vpid == 0)
			exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
S
Sheng Yang 已提交
1930 1931
		if (!vm_need_ept())
			exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
1932 1933
		vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
	}
1934

1935 1936
	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
1937 1938 1939 1940 1941 1942 1943 1944 1945
	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 */
1946 1947
	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
1948
	vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS);  /* 22.2.4 */
1949
#ifdef CONFIG_X86_64
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1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960
	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 */

1961
	kvm_get_idt(&dt);
A
Avi Kivity 已提交
1962 1963
	vmcs_writel(HOST_IDTR_BASE, dt.base);   /* 22.2.4 */

M
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1964
	asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
1965
	vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
1966 1967 1968
	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
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980

	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 */

	for (i = 0; i < NR_VMX_MSR; ++i) {
		u32 index = vmx_msr_index[i];
		u32 data_low, data_high;
		u64 data;
1981
		int j = vmx->nmsrs;
A
Avi Kivity 已提交
1982 1983 1984

		if (rdmsr_safe(index, &data_low, &data_high) < 0)
			continue;
1985 1986
		if (wrmsr_safe(index, data_low, data_high) < 0)
			continue;
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Avi Kivity 已提交
1987
		data = data_low | ((u64)data_high << 32);
1988 1989 1990 1991 1992
		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
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1993 1994
	}

1995
	vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
A
Avi Kivity 已提交
1996 1997

	/* 22.2.1, 20.8.1 */
1998 1999
	vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);

2000 2001 2002
	vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
	vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK);

2003

2004 2005 2006
	return 0;
}

2007 2008 2009 2010 2011 2012 2013 2014 2015
static int init_rmode(struct kvm *kvm)
{
	if (!init_rmode_tss(kvm))
		return 0;
	if (!init_rmode_identity_map(kvm))
		return 0;
	return 1;
}

2016 2017 2018 2019 2020 2021
static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
{
	struct vcpu_vmx *vmx = to_vmx(vcpu);
	u64 msr;
	int ret;

2022
	down_read(&vcpu->kvm->slots_lock);
2023
	if (!init_rmode(vmx->vcpu.kvm)) {
2024 2025 2026 2027
		ret = -ENOMEM;
		goto out;
	}

2028
	vmx->vcpu.arch.rmode.active = 0;
2029

2030
	vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
2031
	kvm_set_cr8(&vmx->vcpu, 0);
2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046
	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);

	/*
	 * 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 {
2047 2048
		vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
		vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099
	}
	vmcs_write32(GUEST_CS_LIMIT, 0xffff);
	vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);

	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)
		vmcs_writel(GUEST_RIP, 0xfff0);
	else
		vmcs_writel(GUEST_RIP, 0);
	vmcs_writel(GUEST_RSP, 0);

	/* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */
	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);

	guest_write_tsc(0);

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

	setup_msrs(vmx);

A
Avi Kivity 已提交
2100 2101
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);  /* 22.2.1 */

2102 2103 2104 2105
	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,
2106
				page_to_phys(vmx->vcpu.arch.apic->regs_page));
2107 2108 2109 2110 2111
		vmcs_write32(TPR_THRESHOLD, 0);
	}

	if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
		vmcs_write64(APIC_ACCESS_ADDR,
2112
			     page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
A
Avi Kivity 已提交
2113

2114 2115 2116
	if (vmx->vpid != 0)
		vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);

2117 2118
	vmx->vcpu.arch.cr0 = 0x60000010;
	vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */
R
Rusty Russell 已提交
2119 2120 2121 2122
	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
2123

2124 2125
	vpid_sync_vcpu_all(vmx);

2126
	ret = 0;
A
Avi Kivity 已提交
2127 2128

out:
2129
	up_read(&vcpu->kvm->slots_lock);
A
Avi Kivity 已提交
2130 2131 2132
	return ret;
}

2133 2134
static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq)
{
2135 2136
	struct vcpu_vmx *vmx = to_vmx(vcpu);

F
Feng (Eric) Liu 已提交
2137 2138
	KVMTRACE_1D(INJ_VIRQ, vcpu, (u32)irq, handler);

2139
	if (vcpu->arch.rmode.active) {
2140 2141 2142
		vmx->rmode.irq.pending = true;
		vmx->rmode.irq.vector = irq;
		vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP);
2143 2144 2145
		vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			     irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK);
		vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
2146
		vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1);
2147 2148 2149 2150 2151 2152
		return;
	}
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
}

2153 2154 2155 2156 2157 2158 2159
static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
{
	vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
			INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
	vcpu->arch.nmi_pending = 0;
}

A
Avi Kivity 已提交
2160 2161
static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
{
2162 2163
	int word_index = __ffs(vcpu->arch.irq_summary);
	int bit_index = __ffs(vcpu->arch.irq_pending[word_index]);
A
Avi Kivity 已提交
2164 2165
	int irq = word_index * BITS_PER_LONG + bit_index;

2166 2167 2168
	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);
2169
	vmx_inject_irq(vcpu, irq);
A
Avi Kivity 已提交
2170 2171
}

2172 2173 2174

static void do_interrupt_requests(struct kvm_vcpu *vcpu,
				       struct kvm_run *kvm_run)
A
Avi Kivity 已提交
2175
{
2176 2177
	u32 cpu_based_vm_exec_control;

2178
	vcpu->arch.interrupt_window_open =
2179 2180 2181
		((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
		 (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);

2182 2183
	if (vcpu->arch.interrupt_window_open &&
	    vcpu->arch.irq_summary &&
2184
	    !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK))
A
Avi Kivity 已提交
2185
		/*
2186
		 * If interrupts enabled, and not blocked by sti or mov ss. Good.
A
Avi Kivity 已提交
2187 2188
		 */
		kvm_do_inject_irq(vcpu);
2189 2190

	cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
2191 2192
	if (!vcpu->arch.interrupt_window_open &&
	    (vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
A
Avi Kivity 已提交
2193 2194 2195
		/*
		 * Interrupts blocked.  Wait for unblock.
		 */
2196 2197 2198 2199
		cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
	else
		cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
	vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
A
Avi Kivity 已提交
2200 2201
}

2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
{
	int ret;
	struct kvm_userspace_memory_region tss_mem = {
		.slot = 8,
		.guest_phys_addr = addr,
		.memory_size = PAGE_SIZE * 3,
		.flags = 0,
	};

	ret = kvm_set_memory_region(kvm, &tss_mem, 0);
	if (ret)
		return ret;
2215
	kvm->arch.tss_addr = addr;
2216 2217 2218
	return 0;
}

A
Avi Kivity 已提交
2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239
static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu)
{
	struct kvm_guest_debug *dbg = &vcpu->guest_debug;

	set_debugreg(dbg->bp[0], 0);
	set_debugreg(dbg->bp[1], 1);
	set_debugreg(dbg->bp[2], 2);
	set_debugreg(dbg->bp[3], 3);

	if (dbg->singlestep) {
		unsigned long flags;

		flags = vmcs_readl(GUEST_RFLAGS);
		flags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
		vmcs_writel(GUEST_RFLAGS, flags);
	}
}

static int handle_rmode_exception(struct kvm_vcpu *vcpu,
				  int vec, u32 err_code)
{
2240
	if (!vcpu->arch.rmode.active)
A
Avi Kivity 已提交
2241 2242
		return 0;

2243 2244 2245 2246 2247
	/*
	 * 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)
2248
		if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE)
A
Avi Kivity 已提交
2249 2250 2251 2252 2253 2254
			return 1;
	return 0;
}

static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2255
	struct vcpu_vmx *vmx = to_vmx(vcpu);
A
Avi Kivity 已提交
2256 2257 2258 2259 2260
	u32 intr_info, error_code;
	unsigned long cr2, rip;
	u32 vect_info;
	enum emulation_result er;

2261
	vect_info = vmx->idt_vectoring_info;
A
Avi Kivity 已提交
2262 2263 2264
	intr_info = vmcs_read32(VM_EXIT_INTR_INFO);

	if ((vect_info & VECTORING_INFO_VALID_MASK) &&
M
Mike Day 已提交
2265
						!is_page_fault(intr_info))
A
Avi Kivity 已提交
2266
		printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
2267
		       "intr info 0x%x\n", __func__, vect_info, intr_info);
A
Avi Kivity 已提交
2268

2269
	if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) {
A
Avi Kivity 已提交
2270
		int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
2271 2272
		set_bit(irq, vcpu->arch.irq_pending);
		set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
A
Avi Kivity 已提交
2273 2274
	}

2275 2276
	if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */
		return 1;  /* already handled by vmx_vcpu_run() */
2277 2278

	if (is_no_device(intr_info)) {
2279
		vmx_fpu_activate(vcpu);
2280 2281 2282
		return 1;
	}

2283
	if (is_invalid_opcode(intr_info)) {
2284
		er = emulate_instruction(vcpu, kvm_run, 0, 0, EMULTYPE_TRAP_UD);
2285
		if (er != EMULATE_DONE)
2286
			kvm_queue_exception(vcpu, UD_VECTOR);
2287 2288 2289
		return 1;
	}

A
Avi Kivity 已提交
2290 2291
	error_code = 0;
	rip = vmcs_readl(GUEST_RIP);
2292
	if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
A
Avi Kivity 已提交
2293 2294
		error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
	if (is_page_fault(intr_info)) {
2295 2296 2297
		/* EPT won't cause page fault directly */
		if (vm_need_ept())
			BUG();
A
Avi Kivity 已提交
2298
		cr2 = vmcs_readl(EXIT_QUALIFICATION);
F
Feng (Eric) Liu 已提交
2299 2300
		KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
			    (u32)((u64)cr2 >> 32), handler);
2301
		return kvm_mmu_page_fault(vcpu, cr2, error_code);
A
Avi Kivity 已提交
2302 2303
	}

2304
	if (vcpu->arch.rmode.active &&
A
Avi Kivity 已提交
2305
	    handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
2306
								error_code)) {
2307 2308
		if (vcpu->arch.halt_request) {
			vcpu->arch.halt_request = 0;
2309 2310
			return kvm_emulate_halt(vcpu);
		}
A
Avi Kivity 已提交
2311
		return 1;
2312
	}
A
Avi Kivity 已提交
2313

M
Mike Day 已提交
2314 2315
	if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) ==
	    (INTR_TYPE_EXCEPTION | 1)) {
A
Avi Kivity 已提交
2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327
		kvm_run->exit_reason = KVM_EXIT_DEBUG;
		return 0;
	}
	kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
	kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK;
	kvm_run->ex.error_code = error_code;
	return 0;
}

static int handle_external_interrupt(struct kvm_vcpu *vcpu,
				     struct kvm_run *kvm_run)
{
A
Avi Kivity 已提交
2328
	++vcpu->stat.irq_exits;
F
Feng (Eric) Liu 已提交
2329
	KVMTRACE_1D(INTR, vcpu, vmcs_read32(VM_EXIT_INTR_INFO), handler);
A
Avi Kivity 已提交
2330 2331 2332
	return 1;
}

2333 2334 2335 2336 2337
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
2338 2339 2340

static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2341
	unsigned long exit_qualification;
2342 2343
	int size, down, in, string, rep;
	unsigned port;
A
Avi Kivity 已提交
2344

A
Avi Kivity 已提交
2345
	++vcpu->stat.io_exits;
2346
	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
2347
	string = (exit_qualification & 16) != 0;
2348 2349

	if (string) {
2350 2351
		if (emulate_instruction(vcpu,
					kvm_run, 0, 0, 0) == EMULATE_DO_MMIO)
2352 2353 2354 2355 2356 2357
			return 0;
		return 1;
	}

	size = (exit_qualification & 7) + 1;
	in = (exit_qualification & 8) != 0;
2358 2359 2360
	down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0;
	rep = (exit_qualification & 32) != 0;
	port = exit_qualification >> 16;
2361

L
Laurent Vivier 已提交
2362
	return kvm_emulate_pio(vcpu, kvm_run, in, size, port);
A
Avi Kivity 已提交
2363 2364
}

I
Ingo Molnar 已提交
2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375
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
2376 2377
static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2378
	unsigned long exit_qualification;
A
Avi Kivity 已提交
2379 2380 2381
	int cr;
	int reg;

2382
	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
A
Avi Kivity 已提交
2383 2384 2385 2386
	cr = exit_qualification & 15;
	reg = (exit_qualification >> 8) & 15;
	switch ((exit_qualification >> 4) & 3) {
	case 0: /* mov to cr */
F
Feng (Eric) Liu 已提交
2387 2388
		KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)vcpu->arch.regs[reg],
			    (u32)((u64)vcpu->arch.regs[reg] >> 32), handler);
A
Avi Kivity 已提交
2389 2390 2391
		switch (cr) {
		case 0:
			vcpu_load_rsp_rip(vcpu);
2392
			kvm_set_cr0(vcpu, vcpu->arch.regs[reg]);
A
Avi Kivity 已提交
2393 2394 2395 2396
			skip_emulated_instruction(vcpu);
			return 1;
		case 3:
			vcpu_load_rsp_rip(vcpu);
2397
			kvm_set_cr3(vcpu, vcpu->arch.regs[reg]);
A
Avi Kivity 已提交
2398 2399 2400 2401
			skip_emulated_instruction(vcpu);
			return 1;
		case 4:
			vcpu_load_rsp_rip(vcpu);
2402
			kvm_set_cr4(vcpu, vcpu->arch.regs[reg]);
A
Avi Kivity 已提交
2403 2404 2405 2406
			skip_emulated_instruction(vcpu);
			return 1;
		case 8:
			vcpu_load_rsp_rip(vcpu);
2407
			kvm_set_cr8(vcpu, vcpu->arch.regs[reg]);
A
Avi Kivity 已提交
2408
			skip_emulated_instruction(vcpu);
2409 2410
			if (irqchip_in_kernel(vcpu->kvm))
				return 1;
2411 2412
			kvm_run->exit_reason = KVM_EXIT_SET_TPR;
			return 0;
A
Avi Kivity 已提交
2413 2414
		};
		break;
2415 2416
	case 2: /* clts */
		vcpu_load_rsp_rip(vcpu);
2417
		vmx_fpu_deactivate(vcpu);
2418 2419
		vcpu->arch.cr0 &= ~X86_CR0_TS;
		vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
2420
		vmx_fpu_activate(vcpu);
F
Feng (Eric) Liu 已提交
2421
		KVMTRACE_0D(CLTS, vcpu, handler);
2422 2423
		skip_emulated_instruction(vcpu);
		return 1;
A
Avi Kivity 已提交
2424 2425 2426 2427
	case 1: /*mov from cr*/
		switch (cr) {
		case 3:
			vcpu_load_rsp_rip(vcpu);
2428
			vcpu->arch.regs[reg] = vcpu->arch.cr3;
A
Avi Kivity 已提交
2429
			vcpu_put_rsp_rip(vcpu);
F
Feng (Eric) Liu 已提交
2430 2431 2432 2433
			KVMTRACE_3D(CR_READ, vcpu, (u32)cr,
				    (u32)vcpu->arch.regs[reg],
				    (u32)((u64)vcpu->arch.regs[reg] >> 32),
				    handler);
A
Avi Kivity 已提交
2434 2435 2436 2437
			skip_emulated_instruction(vcpu);
			return 1;
		case 8:
			vcpu_load_rsp_rip(vcpu);
2438
			vcpu->arch.regs[reg] = kvm_get_cr8(vcpu);
A
Avi Kivity 已提交
2439
			vcpu_put_rsp_rip(vcpu);
F
Feng (Eric) Liu 已提交
2440 2441
			KVMTRACE_2D(CR_READ, vcpu, (u32)cr,
				    (u32)vcpu->arch.regs[reg], handler);
A
Avi Kivity 已提交
2442 2443 2444 2445 2446
			skip_emulated_instruction(vcpu);
			return 1;
		}
		break;
	case 3: /* lmsw */
2447
		kvm_lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f);
A
Avi Kivity 已提交
2448 2449 2450 2451 2452 2453 2454

		skip_emulated_instruction(vcpu);
		return 1;
	default:
		break;
	}
	kvm_run->exit_reason = 0;
2455
	pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
A
Avi Kivity 已提交
2456 2457 2458 2459 2460 2461
	       (int)(exit_qualification >> 4) & 3, cr);
	return 0;
}

static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2462
	unsigned long exit_qualification;
A
Avi Kivity 已提交
2463 2464 2465 2466 2467 2468 2469
	unsigned long val;
	int dr, reg;

	/*
	 * FIXME: this code assumes the host is debugging the guest.
	 *        need to deal with guest debugging itself too.
	 */
2470
	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
A
Avi Kivity 已提交
2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485
	dr = exit_qualification & 7;
	reg = (exit_qualification >> 8) & 15;
	vcpu_load_rsp_rip(vcpu);
	if (exit_qualification & 16) {
		/* mov from dr */
		switch (dr) {
		case 6:
			val = 0xffff0ff0;
			break;
		case 7:
			val = 0x400;
			break;
		default:
			val = 0;
		}
2486
		vcpu->arch.regs[reg] = val;
F
Feng (Eric) Liu 已提交
2487
		KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler);
A
Avi Kivity 已提交
2488 2489 2490 2491 2492 2493 2494 2495 2496 2497
	} else {
		/* mov to dr */
	}
	vcpu_put_rsp_rip(vcpu);
	skip_emulated_instruction(vcpu);
	return 1;
}

static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2498 2499
	kvm_emulate_cpuid(vcpu);
	return 1;
A
Avi Kivity 已提交
2500 2501 2502 2503
}

static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2504
	u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
A
Avi Kivity 已提交
2505 2506 2507
	u64 data;

	if (vmx_get_msr(vcpu, ecx, &data)) {
2508
		kvm_inject_gp(vcpu, 0);
A
Avi Kivity 已提交
2509 2510 2511
		return 1;
	}

F
Feng (Eric) Liu 已提交
2512 2513 2514
	KVMTRACE_3D(MSR_READ, vcpu, ecx, (u32)data, (u32)(data >> 32),
		    handler);

A
Avi Kivity 已提交
2515
	/* FIXME: handling of bits 32:63 of rax, rdx */
2516 2517
	vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
	vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
A
Avi Kivity 已提交
2518 2519 2520 2521 2522 2523
	skip_emulated_instruction(vcpu);
	return 1;
}

static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2524 2525 2526
	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
2527

F
Feng (Eric) Liu 已提交
2528 2529 2530
	KVMTRACE_3D(MSR_WRITE, vcpu, ecx, (u32)data, (u32)(data >> 32),
		    handler);

A
Avi Kivity 已提交
2531
	if (vmx_set_msr(vcpu, ecx, data) != 0) {
2532
		kvm_inject_gp(vcpu, 0);
A
Avi Kivity 已提交
2533 2534 2535 2536 2537 2538 2539
		return 1;
	}

	skip_emulated_instruction(vcpu);
	return 1;
}

2540 2541 2542 2543 2544 2545
static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu,
				      struct kvm_run *kvm_run)
{
	return 1;
}

A
Avi Kivity 已提交
2546 2547 2548
static int handle_interrupt_window(struct kvm_vcpu *vcpu,
				   struct kvm_run *kvm_run)
{
2549 2550 2551 2552 2553 2554
	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
2555 2556 2557

	KVMTRACE_0D(PEND_INTR, vcpu, handler);

2558 2559 2560 2561 2562
	/*
	 * If the user space waits to inject interrupts, exit as soon as
	 * possible
	 */
	if (kvm_run->request_interrupt_window &&
2563
	    !vcpu->arch.irq_summary) {
2564
		kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
A
Avi Kivity 已提交
2565
		++vcpu->stat.irq_window_exits;
2566 2567
		return 0;
	}
A
Avi Kivity 已提交
2568 2569 2570 2571 2572 2573
	return 1;
}

static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	skip_emulated_instruction(vcpu);
2574
	return kvm_emulate_halt(vcpu);
A
Avi Kivity 已提交
2575 2576
}

2577 2578
static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
2579
	skip_emulated_instruction(vcpu);
2580 2581
	kvm_emulate_hypercall(vcpu);
	return 1;
2582 2583
}

E
Eddie Dong 已提交
2584 2585 2586 2587 2588 2589 2590
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;
}

2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610
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;
}

2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624
static int handle_task_switch(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
	unsigned long exit_qualification;
	u16 tss_selector;
	int reason;

	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);

	reason = (u32)exit_qualification >> 30;
	tss_selector = exit_qualification;

	return kvm_task_switch(vcpu, tss_selector, reason);
}

2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682
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;
}

2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695
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;
}

A
Avi Kivity 已提交
2696 2697 2698 2699 2700 2701 2702 2703 2704
/*
 * 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,
2705
	[EXIT_REASON_TRIPLE_FAULT]            = handle_triple_fault,
2706
	[EXIT_REASON_NMI_WINDOW]	      = handle_nmi_window,
A
Avi Kivity 已提交
2707 2708 2709 2710 2711 2712 2713 2714
	[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,
2715
	[EXIT_REASON_VMCALL]                  = handle_vmcall,
2716 2717
	[EXIT_REASON_TPR_BELOW_THRESHOLD]     = handle_tpr_below_threshold,
	[EXIT_REASON_APIC_ACCESS]             = handle_apic_access,
E
Eddie Dong 已提交
2718
	[EXIT_REASON_WBINVD]                  = handle_wbinvd,
2719
	[EXIT_REASON_TASK_SWITCH]             = handle_task_switch,
2720
	[EXIT_REASON_EPT_VIOLATION]	      = handle_ept_violation,
A
Avi Kivity 已提交
2721 2722 2723
};

static const int kvm_vmx_max_exit_handlers =
2724
	ARRAY_SIZE(kvm_vmx_exit_handlers);
A
Avi Kivity 已提交
2725 2726 2727 2728 2729 2730 2731 2732

/*
 * 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);
2733
	struct vcpu_vmx *vmx = to_vmx(vcpu);
2734
	u32 vectoring_info = vmx->idt_vectoring_info;
2735

F
Feng (Eric) Liu 已提交
2736 2737 2738
	KVMTRACE_3D(VMEXIT, vcpu, exit_reason, (u32)vmcs_readl(GUEST_RIP),
		    (u32)((u64)vmcs_readl(GUEST_RIP) >> 32), entryexit);

2739 2740 2741 2742 2743 2744 2745
	/* 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);
	}

2746 2747 2748 2749 2750 2751
	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
2752

M
Mike Day 已提交
2753
	if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
2754 2755
			(exit_reason != EXIT_REASON_EXCEPTION_NMI &&
			exit_reason != EXIT_REASON_EPT_VIOLATION))
A
Avi Kivity 已提交
2756
		printk(KERN_WARNING "%s: unexpected, valid vectoring info and "
2757
		       "exit reason is 0x%x\n", __func__, exit_reason);
A
Avi Kivity 已提交
2758 2759 2760 2761 2762 2763 2764 2765 2766 2767
	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;
}

2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784
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);
}

2785 2786 2787 2788 2789 2790 2791 2792 2793
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);
}

2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829
static void enable_nmi_window(struct kvm_vcpu *vcpu)
{
	u32 cpu_based_vm_exec_control;

	if (!cpu_has_virtual_nmis())
		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);
}

static int vmx_nmi_enabled(struct kvm_vcpu *vcpu)
{
	u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
	return !(guest_intr & (GUEST_INTR_STATE_NMI |
			       GUEST_INTR_STATE_MOV_SS |
			       GUEST_INTR_STATE_STI));
}

static int vmx_irq_enabled(struct kvm_vcpu *vcpu)
{
	u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
	return (!(guest_intr & (GUEST_INTR_STATE_MOV_SS |
			       GUEST_INTR_STATE_STI)) &&
		(vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF));
}

static void enable_intr_window(struct kvm_vcpu *vcpu)
{
	if (vcpu->arch.nmi_pending)
		enable_nmi_window(vcpu);
	else if (kvm_cpu_has_interrupt(vcpu))
		enable_irq_window(vcpu);
}

2830 2831
static void vmx_intr_assist(struct kvm_vcpu *vcpu)
{
2832
	struct vcpu_vmx *vmx = to_vmx(vcpu);
2833
	u32 idtv_info_field, intr_info_field, exit_intr_info_field;
2834
	int vector;
2835

2836 2837
	update_tpr_threshold(vcpu);

2838
	intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD);
2839
	exit_intr_info_field = vmcs_read32(VM_EXIT_INTR_INFO);
2840
	idtv_info_field = vmx->idt_vectoring_info;
2841 2842 2843
	if (intr_info_field & INTR_INFO_VALID_MASK) {
		if (idtv_info_field & INTR_INFO_VALID_MASK) {
			/* TODO: fault when IDT_Vectoring */
2844 2845
			if (printk_ratelimit())
				printk(KERN_ERR "Fault when IDT_Vectoring\n");
2846
		}
2847
		enable_intr_window(vcpu);
2848 2849 2850
		return;
	}
	if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) {
2851 2852
		if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
		    == INTR_TYPE_EXT_INTR
2853
		    && vcpu->arch.rmode.active) {
2854 2855 2856
			u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK;

			vmx_inject_irq(vcpu, vect);
2857
			enable_intr_window(vcpu);
2858 2859 2860
			return;
		}

F
Feng (Eric) Liu 已提交
2861 2862
		KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler);

2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875
		/*
		 * SDM 3: 25.7.1.2
		 * Clear bit "block by NMI" before VM entry if a NMI delivery
		 * faulted.
		 */
		if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
		    == INTR_TYPE_NMI_INTR && cpu_has_virtual_nmis())
			vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
				vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
				~GUEST_INTR_STATE_NMI);

		vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field
				& ~INTR_INFO_RESVD_BITS_MASK);
2876 2877 2878
		vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
				vmcs_read32(VM_EXIT_INSTRUCTION_LEN));

2879
		if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK))
2880 2881
			vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
				vmcs_read32(IDT_VECTORING_ERROR_CODE));
2882
		enable_intr_window(vcpu);
2883 2884
		return;
	}
2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904
	if (cpu_has_virtual_nmis()) {
		/*
		 * SDM 3: 25.7.1.2
		 * Re-set bit "block by NMI" before VM entry if vmexit caused by
		 * a guest IRET fault.
		 */
		if ((exit_intr_info_field & INTR_INFO_UNBLOCK_NMI) &&
		    (exit_intr_info_field & INTR_INFO_VECTOR_MASK) != 8)
			vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
				vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) |
				GUEST_INTR_STATE_NMI);
		else if (vcpu->arch.nmi_pending) {
			if (vmx_nmi_enabled(vcpu))
				vmx_inject_nmi(vcpu);
			enable_intr_window(vcpu);
			return;
		}

	}
	if (!kvm_cpu_has_interrupt(vcpu))
2905
		return;
2906
	if (vmx_irq_enabled(vcpu)) {
2907 2908 2909 2910
		vector = kvm_cpu_get_interrupt(vcpu);
		vmx_inject_irq(vcpu, vector);
		kvm_timer_intr_post(vcpu, vector);
	} else
2911 2912 2913
		enable_irq_window(vcpu);
}

2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936
/*
 * 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;
	if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip)
		return;
	vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip);
	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;
}

2937
static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
A
Avi Kivity 已提交
2938
{
2939
	struct vcpu_vmx *vmx = to_vmx(vcpu);
2940
	u32 intr_info;
2941 2942 2943 2944 2945 2946

	/*
	 * Loading guest fpu may have cleared host cr0.ts
	 */
	vmcs_writel(HOST_CR0, read_cr0());

M
Mike Day 已提交
2947
	asm(
A
Avi Kivity 已提交
2948
		/* Store host registers */
2949
#ifdef CONFIG_X86_64
2950
		"push %%rdx; push %%rbp;"
A
Avi Kivity 已提交
2951 2952
		"push %%rcx \n\t"
#else
2953 2954
		"push %%edx; push %%ebp;"
		"push %%ecx \n\t"
A
Avi Kivity 已提交
2955
#endif
2956
		__ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
A
Avi Kivity 已提交
2957
		/* Check if vmlaunch of vmresume is needed */
2958
		"cmpl $0, %c[launched](%0) \n\t"
A
Avi Kivity 已提交
2959
		/* Load guest registers.  Don't clobber flags. */
2960
#ifdef CONFIG_X86_64
2961
		"mov %c[cr2](%0), %%rax \n\t"
A
Avi Kivity 已提交
2962
		"mov %%rax, %%cr2 \n\t"
2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977
		"mov %c[rax](%0), %%rax \n\t"
		"mov %c[rbx](%0), %%rbx \n\t"
		"mov %c[rdx](%0), %%rdx \n\t"
		"mov %c[rsi](%0), %%rsi \n\t"
		"mov %c[rdi](%0), %%rdi \n\t"
		"mov %c[rbp](%0), %%rbp \n\t"
		"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"
		"mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */
A
Avi Kivity 已提交
2978
#else
2979
		"mov %c[cr2](%0), %%eax \n\t"
A
Avi Kivity 已提交
2980
		"mov %%eax,   %%cr2 \n\t"
2981 2982 2983 2984 2985 2986 2987
		"mov %c[rax](%0), %%eax \n\t"
		"mov %c[rbx](%0), %%ebx \n\t"
		"mov %c[rdx](%0), %%edx \n\t"
		"mov %c[rsi](%0), %%esi \n\t"
		"mov %c[rdi](%0), %%edi \n\t"
		"mov %c[rbp](%0), %%ebp \n\t"
		"mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */
A
Avi Kivity 已提交
2988 2989
#endif
		/* Enter guest mode */
2990
		"jne .Llaunched \n\t"
2991
		__ex(ASM_VMX_VMLAUNCH) "\n\t"
2992
		"jmp .Lkvm_vmx_return \n\t"
2993
		".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
2994
		".Lkvm_vmx_return: "
A
Avi Kivity 已提交
2995
		/* Save guest registers, load host registers, keep flags */
2996
#ifdef CONFIG_X86_64
2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012
		"xchg %0,     (%%rsp) \n\t"
		"mov %%rax, %c[rax](%0) \n\t"
		"mov %%rbx, %c[rbx](%0) \n\t"
		"pushq (%%rsp); popq %c[rcx](%0) \n\t"
		"mov %%rdx, %c[rdx](%0) \n\t"
		"mov %%rsi, %c[rsi](%0) \n\t"
		"mov %%rdi, %c[rdi](%0) \n\t"
		"mov %%rbp, %c[rbp](%0) \n\t"
		"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
3013
		"mov %%cr2, %%rax   \n\t"
3014
		"mov %%rax, %c[cr2](%0) \n\t"
A
Avi Kivity 已提交
3015

3016
		"pop  %%rbp; pop  %%rbp; pop  %%rdx \n\t"
A
Avi Kivity 已提交
3017
#else
3018 3019 3020 3021 3022 3023 3024 3025
		"xchg %0, (%%esp) \n\t"
		"mov %%eax, %c[rax](%0) \n\t"
		"mov %%ebx, %c[rbx](%0) \n\t"
		"pushl (%%esp); popl %c[rcx](%0) \n\t"
		"mov %%edx, %c[rdx](%0) \n\t"
		"mov %%esi, %c[rsi](%0) \n\t"
		"mov %%edi, %c[rdi](%0) \n\t"
		"mov %%ebp, %c[rbp](%0) \n\t"
A
Avi Kivity 已提交
3026
		"mov %%cr2, %%eax  \n\t"
3027
		"mov %%eax, %c[cr2](%0) \n\t"
A
Avi Kivity 已提交
3028

3029
		"pop %%ebp; pop %%ebp; pop %%edx \n\t"
A
Avi Kivity 已提交
3030
#endif
3031 3032 3033 3034
		"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)),
3035 3036 3037 3038 3039 3040 3041
		[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])),
3042
#ifdef CONFIG_X86_64
3043 3044 3045 3046 3047 3048 3049 3050
		[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
3051
#endif
3052
		[cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
3053 3054 3055 3056
	      : "cc", "memory"
#ifdef CONFIG_X86_64
		, "rbx", "rdi", "rsi"
		, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
3057 3058
#else
		, "ebx", "edi", "rsi"
3059 3060
#endif
	      );
A
Avi Kivity 已提交
3061

3062
	vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
3063 3064
	if (vmx->rmode.irq.pending)
		fixup_rmode_irq(vmx);
3065

3066
	vcpu->arch.interrupt_window_open =
3067 3068
		(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
		 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)) == 0;
A
Avi Kivity 已提交
3069

M
Mike Day 已提交
3070
	asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
3071
	vmx->launched = 1;
3072 3073 3074 3075

	intr_info = vmcs_read32(VM_EXIT_INTR_INFO);

	/* We need to handle NMIs before interrupts are enabled */
3076 3077
	if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200 &&
	    (intr_info & INTR_INFO_VALID_MASK)) {
F
Feng (Eric) Liu 已提交
3078
		KVMTRACE_0D(NMI, vcpu, handler);
3079
		asm("int $2");
F
Feng (Eric) Liu 已提交
3080
	}
A
Avi Kivity 已提交
3081 3082 3083 3084
}

static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
{
3085 3086 3087
	struct vcpu_vmx *vmx = to_vmx(vcpu);

	if (vmx->vmcs) {
3088
		vcpu_clear(vmx);
3089 3090
		free_vmcs(vmx->vmcs);
		vmx->vmcs = NULL;
A
Avi Kivity 已提交
3091 3092 3093 3094 3095
	}
}

static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
{
R
Rusty Russell 已提交
3096 3097
	struct vcpu_vmx *vmx = to_vmx(vcpu);

3098 3099 3100 3101
	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
3102
	vmx_free_vmcs(vcpu);
R
Rusty Russell 已提交
3103 3104 3105
	kfree(vmx->host_msrs);
	kfree(vmx->guest_msrs);
	kvm_vcpu_uninit(vcpu);
3106
	kmem_cache_free(kvm_vcpu_cache, vmx);
A
Avi Kivity 已提交
3107 3108
}

R
Rusty Russell 已提交
3109
static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
A
Avi Kivity 已提交
3110
{
R
Rusty Russell 已提交
3111
	int err;
3112
	struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
3113
	int cpu;
A
Avi Kivity 已提交
3114

3115
	if (!vmx)
R
Rusty Russell 已提交
3116 3117
		return ERR_PTR(-ENOMEM);

3118
	allocate_vpid(vmx);
3119 3120 3121 3122 3123 3124 3125 3126 3127
	if (id == 0 && vm_need_ept()) {
		kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
			VMX_EPT_WRITABLE_MASK |
			VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
		kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
				VMX_EPT_FAKE_DIRTY_MASK, 0ull,
				VMX_EPT_EXECUTABLE_MASK);
		kvm_enable_tdp();
	}
3128

R
Rusty Russell 已提交
3129 3130 3131
	err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
	if (err)
		goto free_vcpu;
3132

3133
	vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
R
Rusty Russell 已提交
3134 3135 3136 3137
	if (!vmx->guest_msrs) {
		err = -ENOMEM;
		goto uninit_vcpu;
	}
3138

3139 3140
	vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!vmx->host_msrs)
R
Rusty Russell 已提交
3141
		goto free_guest_msrs;
3142

3143 3144
	vmx->vmcs = alloc_vmcs();
	if (!vmx->vmcs)
R
Rusty Russell 已提交
3145
		goto free_msrs;
3146 3147 3148

	vmcs_clear(vmx->vmcs);

3149 3150
	cpu = get_cpu();
	vmx_vcpu_load(&vmx->vcpu, cpu);
R
Rusty Russell 已提交
3151
	err = vmx_vcpu_setup(vmx);
R
Rusty Russell 已提交
3152
	vmx_vcpu_put(&vmx->vcpu);
3153
	put_cpu();
R
Rusty Russell 已提交
3154 3155
	if (err)
		goto free_vmcs;
3156 3157 3158
	if (vm_need_virtualize_apic_accesses(kvm))
		if (alloc_apic_access_page(kvm) != 0)
			goto free_vmcs;
R
Rusty Russell 已提交
3159

3160 3161 3162 3163
	if (vm_need_ept())
		if (alloc_identity_pagetable(kvm) != 0)
			goto free_vmcs;

R
Rusty Russell 已提交
3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174
	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:
3175
	kmem_cache_free(kvm_vcpu_cache, vmx);
R
Rusty Russell 已提交
3176
	return ERR_PTR(err);
A
Avi Kivity 已提交
3177 3178
}

Y
Yang, Sheng 已提交
3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192
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;
	}
}

3193 3194 3195 3196 3197
static int get_ept_level(void)
{
	return VMX_EPT_DEFAULT_GAW + 1;
}

3198
static struct kvm_x86_ops vmx_x86_ops = {
A
Avi Kivity 已提交
3199 3200 3201 3202
	.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
3203
	.check_processor_compatibility = vmx_check_processor_compat,
A
Avi Kivity 已提交
3204 3205
	.hardware_enable = hardware_enable,
	.hardware_disable = hardware_disable,
3206
	.cpu_has_accelerated_tpr = cpu_has_vmx_virtualize_apic_accesses,
A
Avi Kivity 已提交
3207 3208 3209

	.vcpu_create = vmx_create_vcpu,
	.vcpu_free = vmx_free_vcpu,
3210
	.vcpu_reset = vmx_vcpu_reset,
A
Avi Kivity 已提交
3211

3212
	.prepare_guest_switch = vmx_save_host_state,
A
Avi Kivity 已提交
3213 3214 3215 3216
	.vcpu_load = vmx_vcpu_load,
	.vcpu_put = vmx_vcpu_put,

	.set_guest_debug = set_guest_debug,
3217
	.guest_debug_pre = kvm_guest_debug_pre,
A
Avi Kivity 已提交
3218 3219 3220 3221 3222
	.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,
3223
	.get_cpl = vmx_get_cpl,
A
Avi Kivity 已提交
3224
	.get_cs_db_l_bits = vmx_get_cs_db_l_bits,
3225
	.decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
A
Avi Kivity 已提交
3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241
	.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,
	.cache_regs = vcpu_load_rsp_rip,
	.decache_regs = vcpu_put_rsp_rip,
	.get_rflags = vmx_get_rflags,
	.set_rflags = vmx_set_rflags,

	.tlb_flush = vmx_flush_tlb,

	.run = vmx_vcpu_run,
3242
	.handle_exit = kvm_handle_exit,
A
Avi Kivity 已提交
3243
	.skip_emulated_instruction = skip_emulated_instruction,
I
Ingo Molnar 已提交
3244
	.patch_hypercall = vmx_patch_hypercall,
E
Eddie Dong 已提交
3245 3246
	.get_irq = vmx_get_irq,
	.set_irq = vmx_inject_irq,
3247 3248
	.queue_exception = vmx_queue_exception,
	.exception_injected = vmx_exception_injected,
3249 3250
	.inject_pending_irq = vmx_intr_assist,
	.inject_pending_vectors = do_interrupt_requests,
3251 3252

	.set_tss_addr = vmx_set_tss_addr,
3253
	.get_tdp_level = get_ept_level,
A
Avi Kivity 已提交
3254 3255 3256 3257
};

static int __init vmx_init(void)
{
S
Sheng Yang 已提交
3258
	void *va;
3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270
	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
3271 3272 3273 3274 3275 3276
	vmx_msr_bitmap = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
	if (!vmx_msr_bitmap) {
		r = -ENOMEM;
		goto out1;
	}

3277 3278 3279 3280
	/*
	 * 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
3281 3282 3283
	va = kmap(vmx_io_bitmap_a);
	memset(va, 0xff, PAGE_SIZE);
	clear_bit(0x80, va);
3284
	kunmap(vmx_io_bitmap_a);
3285

S
Sheng Yang 已提交
3286 3287
	va = kmap(vmx_io_bitmap_b);
	memset(va, 0xff, PAGE_SIZE);
3288
	kunmap(vmx_io_bitmap_b);
3289

S
Sheng Yang 已提交
3290 3291 3292 3293
	va = kmap(vmx_msr_bitmap);
	memset(va, 0xff, PAGE_SIZE);
	kunmap(vmx_msr_bitmap);

3294 3295
	set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */

3296
	r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
3297
	if (r)
S
Sheng Yang 已提交
3298 3299 3300 3301 3302 3303 3304
		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);
3305

3306 3307 3308
	if (cpu_has_vmx_ept())
		bypass_guest_pf = 0;

3309 3310 3311
	if (bypass_guest_pf)
		kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);

3312 3313
	ept_sync_global();

3314 3315
	return 0;

S
Sheng Yang 已提交
3316 3317
out2:
	__free_page(vmx_msr_bitmap);
3318 3319 3320 3321 3322
out1:
	__free_page(vmx_io_bitmap_b);
out:
	__free_page(vmx_io_bitmap_a);
	return r;
A
Avi Kivity 已提交
3323 3324 3325 3326
}

static void __exit vmx_exit(void)
{
S
Sheng Yang 已提交
3327
	__free_page(vmx_msr_bitmap);
3328 3329 3330
	__free_page(vmx_io_bitmap_b);
	__free_page(vmx_io_bitmap_a);

3331
	kvm_exit();
A
Avi Kivity 已提交
3332 3333 3334 3335
}

module_init(vmx_init)
module_exit(vmx_exit)