[linux.git] / drivers / kvm / kvm.h

#ifndef __KVM_H
#define __KVM_H

/*
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 */

#include <linux/types.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/mm.h>

#include "vmx.h"
#include <linux/kvm.h>
#include <linux/kvm_para.h>

#define CR0_PE_MASK (1ULL << 0)
#define CR0_TS_MASK (1ULL << 3)
#define CR0_NE_MASK (1ULL << 5)
#define CR0_WP_MASK (1ULL << 16)
#define CR0_NW_MASK (1ULL << 29)
#define CR0_CD_MASK (1ULL << 30)
#define CR0_PG_MASK (1ULL << 31)

#define CR3_WPT_MASK (1ULL << 3)
#define CR3_PCD_MASK (1ULL << 4)

#define CR3_RESEVED_BITS 0x07ULL
#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL)
#define CR3_FLAGS_MASK ((1ULL << 5) - 1)

#define CR4_VME_MASK (1ULL << 0)
#define CR4_PSE_MASK (1ULL << 4)
#define CR4_PAE_MASK (1ULL << 5)
#define CR4_PGE_MASK (1ULL << 7)
#define CR4_VMXE_MASK (1ULL << 13)

#define KVM_GUEST_CR0_MASK \
	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK \
	 | CR0_NW_MASK | CR0_CD_MASK)
#define KVM_VM_CR0_ALWAYS_ON \
	(CR0_PG_MASK | CR0_PE_MASK | CR0_WP_MASK | CR0_NE_MASK)
#define KVM_GUEST_CR4_MASK \
	(CR4_PSE_MASK | CR4_PAE_MASK | CR4_PGE_MASK | CR4_VMXE_MASK | CR4_VME_MASK)
#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK)
#define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK | CR4_PAE_MASK | CR4_VME_MASK)

#define INVALID_PAGE (~(hpa_t)0)
#define UNMAPPED_GVA (~(gpa_t)0)

#define KVM_MAX_VCPUS 1
#define KVM_ALIAS_SLOTS 4
#define KVM_MEMORY_SLOTS 4
#define KVM_NUM_MMU_PAGES 256
#define KVM_MIN_FREE_MMU_PAGES 5
#define KVM_REFILL_PAGES 25
#define KVM_MAX_CPUID_ENTRIES 40

#define FX_IMAGE_SIZE 512
#define FX_IMAGE_ALIGN 16
#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)

#define DE_VECTOR 0
#define DF_VECTOR 8
#define TS_VECTOR 10
#define NP_VECTOR 11
#define SS_VECTOR 12
#define GP_VECTOR 13
#define PF_VECTOR 14

#define SELECTOR_TI_MASK (1 << 2)
#define SELECTOR_RPL_MASK 0x03

#define IOPL_SHIFT 12

#define KVM_PIO_PAGE_OFFSET 1

/*
 * Address types:
 *
 *  gva - guest virtual address
 *  gpa - guest physical address
 *  gfn - guest frame number
 *  hva - host virtual address
 *  hpa - host physical address
 *  hfn - host frame number
 */

typedef unsigned long  gva_t;
typedef u64            gpa_t;
typedef unsigned long  gfn_t;

typedef unsigned long  hva_t;
typedef u64            hpa_t;
typedef unsigned long  hfn_t;

#define NR_PTE_CHAIN_ENTRIES 5

struct kvm_pte_chain {
	u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
	struct hlist_node link;
};

/*
 * kvm_mmu_page_role, below, is defined as:
 *
 *   bits 0:3 - total guest paging levels (2-4, or zero for real mode)
 *   bits 4:7 - page table level for this shadow (1-4)
 *   bits 8:9 - page table quadrant for 2-level guests
 *   bit   16 - "metaphysical" - gfn is not a real page (huge page/real mode)
 *   bits 17:18 - "access" - the user and writable bits of a huge page pde
 */
union kvm_mmu_page_role {
	unsigned word;
	struct {
		unsigned glevels : 4;
		unsigned level : 4;
		unsigned quadrant : 2;
		unsigned pad_for_nice_hex_output : 6;
		unsigned metaphysical : 1;
		unsigned hugepage_access : 2;
	};
};

struct kvm_mmu_page {
	struct list_head link;
	struct hlist_node hash_link;

	/*
	 * The following two entries are used to key the shadow page in the
	 * hash table.
	 */
	gfn_t gfn;
	union kvm_mmu_page_role role;

	hpa_t page_hpa;
	unsigned long slot_bitmap; /* One bit set per slot which has memory
				    * in this shadow page.
				    */
	int multimapped;         /* More than one parent_pte? */
	int root_count;          /* Currently serving as active root */
	union {
		u64 *parent_pte;               /* !multimapped */
		struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
	};
};

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

#define vmx_msr_entry kvm_msr_entry

struct kvm_vcpu;

/*
 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
 * 32-bit).  The kvm_mmu structure abstracts the details of the current mmu
 * mode.
 */
struct kvm_mmu {
	void (*new_cr3)(struct kvm_vcpu *vcpu);
	int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
	void (*free)(struct kvm_vcpu *vcpu);
	gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
	hpa_t root_hpa;
	int root_level;
	int shadow_root_level;

	u64 *pae_root;
};

#define KVM_NR_MEM_OBJS 20

struct kvm_mmu_memory_cache {
	int nobjs;
	void *objects[KVM_NR_MEM_OBJS];
};

/*
 * We don't want allocation failures within the mmu code, so we preallocate
 * enough memory for a single page fault in a cache.
 */
struct kvm_guest_debug {
	int enabled;
	unsigned long bp[4];
	int singlestep;
};

enum {
	VCPU_REGS_RAX = 0,
	VCPU_REGS_RCX = 1,
	VCPU_REGS_RDX = 2,
	VCPU_REGS_RBX = 3,
	VCPU_REGS_RSP = 4,
	VCPU_REGS_RBP = 5,
	VCPU_REGS_RSI = 6,
	VCPU_REGS_RDI = 7,
#ifdef CONFIG_X86_64
	VCPU_REGS_R8 = 8,
	VCPU_REGS_R9 = 9,
	VCPU_REGS_R10 = 10,
	VCPU_REGS_R11 = 11,
	VCPU_REGS_R12 = 12,
	VCPU_REGS_R13 = 13,
	VCPU_REGS_R14 = 14,
	VCPU_REGS_R15 = 15,
#endif
	NR_VCPU_REGS
};

enum {
	VCPU_SREG_CS,
	VCPU_SREG_DS,
	VCPU_SREG_ES,
	VCPU_SREG_FS,
	VCPU_SREG_GS,
	VCPU_SREG_SS,
	VCPU_SREG_TR,
	VCPU_SREG_LDTR,
};

struct kvm_pio_request {
	unsigned long count;
	int cur_count;
	struct page *guest_pages[2];
	unsigned guest_page_offset;
	int in;
	int size;
	int string;
	int down;
	int rep;
};

struct kvm_vcpu {
	struct kvm *kvm;
	union {
		struct vmcs *vmcs;
		struct vcpu_svm *svm;
	};
	struct mutex mutex;
	int   cpu;
	int   launched;
	u64 host_tsc;
	struct kvm_run *run;
	int interrupt_window_open;
	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
	unsigned long irq_pending[NR_IRQ_WORDS];
	unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
	unsigned long rip;      /* needs vcpu_load_rsp_rip() */

	unsigned long cr0;
	unsigned long cr2;
	unsigned long cr3;
	gpa_t para_state_gpa;
	struct page *para_state_page;
	gpa_t hypercall_gpa;
	unsigned long cr4;
	unsigned long cr8;
	u64 pdptrs[4]; /* pae */
	u64 shadow_efer;
	u64 apic_base;
	u64 ia32_misc_enable_msr;
	int nmsrs;
	struct vmx_msr_entry *guest_msrs;
	struct vmx_msr_entry *host_msrs;

	struct list_head free_pages;
	struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
	struct kvm_mmu mmu;

	struct kvm_mmu_memory_cache mmu_pte_chain_cache;
	struct kvm_mmu_memory_cache mmu_rmap_desc_cache;

	gfn_t last_pt_write_gfn;
	int   last_pt_write_count;

	struct kvm_guest_debug guest_debug;

	char fx_buf[FX_BUF_SIZE];
	char *host_fx_image;
	char *guest_fx_image;

	int mmio_needed;
	int mmio_read_completed;
	int mmio_is_write;
	int mmio_size;
	unsigned char mmio_data[8];
	gpa_t mmio_phys_addr;
	struct kvm_pio_request pio;
	void *pio_data;

	int sigset_active;
	sigset_t sigset;

	struct {
		int active;
		u8 save_iopl;
		struct kvm_save_segment {
			u16 selector;
			unsigned long base;
			u32 limit;
			u32 ar;
		} tr, es, ds, fs, gs;
	} rmode;

	int cpuid_nent;
	struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
};

struct kvm_mem_alias {
	gfn_t base_gfn;
	unsigned long npages;
	gfn_t target_gfn;
};

struct kvm_memory_slot {
	gfn_t base_gfn;
	unsigned long npages;
	unsigned long flags;
	struct page **phys_mem;
	unsigned long *dirty_bitmap;
};

struct kvm {
	spinlock_t lock; /* protects everything except vcpus */
	int naliases;
	struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
	int nmemslots;
	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
	/*
	 * Hash table of struct kvm_mmu_page.
	 */
	struct list_head active_mmu_pages;
	int n_free_mmu_pages;
	struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
	struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
	int memory_config_version;
	int busy;
	unsigned long rmap_overflow;
	struct list_head vm_list;
	struct file *filp;
};

struct kvm_stat {
	u32 pf_fixed;
	u32 pf_guest;
	u32 tlb_flush;
	u32 invlpg;

	u32 exits;
	u32 io_exits;
	u32 mmio_exits;
	u32 signal_exits;
	u32 irq_window_exits;
	u32 halt_exits;
	u32 request_irq_exits;
	u32 irq_exits;
};

struct descriptor_table {
	u16 limit;
	unsigned long base;
} __attribute__((packed));

struct kvm_arch_ops {
	int (*cpu_has_kvm_support)(void);          /* __init */
	int (*disabled_by_bios)(void);             /* __init */
	void (*hardware_enable)(void *dummy);      /* __init */
	void (*hardware_disable)(void *dummy);
	int (*hardware_setup)(void);               /* __init */
	void (*hardware_unsetup)(void);            /* __exit */

	int (*vcpu_create)(struct kvm_vcpu *vcpu);
	void (*vcpu_free)(struct kvm_vcpu *vcpu);

	void (*vcpu_load)(struct kvm_vcpu *vcpu);
	void (*vcpu_put)(struct kvm_vcpu *vcpu);
	void (*vcpu_decache)(struct kvm_vcpu *vcpu);

	int (*set_guest_debug)(struct kvm_vcpu *vcpu,
			       struct kvm_debug_guest *dbg);
	int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
	int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
	u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
	void (*get_segment)(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg);
	void (*set_segment)(struct kvm_vcpu *vcpu,
			    struct kvm_segment *var, int seg);
	void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
	void (*decache_cr0_cr4_guest_bits)(struct kvm_vcpu *vcpu);
	void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
	void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
	void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
	void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
	void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
	unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
	void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
		       int *exception);
	void (*cache_regs)(struct kvm_vcpu *vcpu);
	void (*decache_regs)(struct kvm_vcpu *vcpu);
	unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
	void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);

	void (*invlpg)(struct kvm_vcpu *vcpu, gva_t addr);
	void (*tlb_flush)(struct kvm_vcpu *vcpu);
	void (*inject_page_fault)(struct kvm_vcpu *vcpu,
				  unsigned long addr, u32 err_code);

	void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);

	int (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
	int (*vcpu_setup)(struct kvm_vcpu *vcpu);
	void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
	void (*patch_hypercall)(struct kvm_vcpu *vcpu,
				unsigned char *hypercall_addr);
};

extern struct kvm_stat kvm_stat;
extern struct kvm_arch_ops *kvm_arch_ops;

#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)

int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
void kvm_exit_arch(void);

void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
int kvm_mmu_create(struct kvm_vcpu *vcpu);
int kvm_mmu_setup(struct kvm_vcpu *vcpu);

int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);

hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);

void kvm_emulator_want_group7_invlpg(void);

extern hpa_t bad_page_address;

struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
void mark_page_dirty(struct kvm *kvm, gfn_t gfn);

enum emulation_result {
	EMULATE_DONE,       /* no further processing */
	EMULATE_DO_MMIO,      /* kvm_run filled with mmio request */
	EMULATE_FAIL,         /* can't emulate this instruction */
};

int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
			unsigned long cr2, u16 error_code);
void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
		   unsigned long *rflags);

unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
		     unsigned long *rflags);

struct x86_emulate_ctxt;

int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
		  int size, unsigned long count, int string, int down,
		  gva_t address, int rep, unsigned port);
void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
int emulate_clts(struct kvm_vcpu *vcpu);
int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
		    unsigned long *dest);
int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
		    unsigned long value);

void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);

int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);

void fx_init(struct kvm_vcpu *vcpu);

void load_msrs(struct vmx_msr_entry *e, int n);
void save_msrs(struct vmx_msr_entry *e, int n);
void kvm_resched(struct kvm_vcpu *vcpu);

int kvm_read_guest(struct kvm_vcpu *vcpu,
	       gva_t addr,
	       unsigned long size,
	       void *dest);

int kvm_write_guest(struct kvm_vcpu *vcpu,
		gva_t addr,
		unsigned long size,
		void *data);

unsigned long segment_base(u16 selector);

void kvm_mmu_pre_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
void kvm_mmu_post_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);

int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);

static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
				     u32 error_code)
{
	if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
		kvm_mmu_free_some_pages(vcpu);
	return vcpu->mmu.page_fault(vcpu, gva, error_code);
}

static inline int is_long_mode(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_X86_64
	return vcpu->shadow_efer & EFER_LME;
#else
	return 0;
#endif
}

static inline int is_pae(struct kvm_vcpu *vcpu)
{
	return vcpu->cr4 & CR4_PAE_MASK;
}

static inline int is_pse(struct kvm_vcpu *vcpu)
{
	return vcpu->cr4 & CR4_PSE_MASK;
}

static inline int is_paging(struct kvm_vcpu *vcpu)
{
	return vcpu->cr0 & CR0_PG_MASK;
}

static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
{
	return slot - kvm->memslots;
}

static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
{
	struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);

	return (struct kvm_mmu_page *)page_private(page);
}

static inline u16 read_fs(void)
{
	u16 seg;
	asm ("mov %%fs, %0" : "=g"(seg));
	return seg;
}

static inline u16 read_gs(void)
{
	u16 seg;
	asm ("mov %%gs, %0" : "=g"(seg));
	return seg;
}

static inline u16 read_ldt(void)
{
	u16 ldt;
	asm ("sldt %0" : "=g"(ldt));
	return ldt;
}

static inline void load_fs(u16 sel)
{
	asm ("mov %0, %%fs" : : "rm"(sel));
}

static inline void load_gs(u16 sel)
{
	asm ("mov %0, %%gs" : : "rm"(sel));
}

#ifndef load_ldt
static inline void load_ldt(u16 sel)
{
	asm ("lldt %0" : : "rm"(sel));
}
#endif

static inline void get_idt(struct descriptor_table *table)
{
	asm ("sidt %0" : "=m"(*table));
}

static inline void get_gdt(struct descriptor_table *table)
{
	asm ("sgdt %0" : "=m"(*table));
}

static inline unsigned long read_tr_base(void)
{
	u16 tr;
	asm ("str %0" : "=g"(tr));
	return segment_base(tr);
}

#ifdef CONFIG_X86_64
static inline unsigned long read_msr(unsigned long msr)
{
	u64 value;

	rdmsrl(msr, value);
	return value;
}
#endif

static inline void fx_save(void *image)
{
	asm ("fxsave (%0)":: "r" (image));
}

static inline void fx_restore(void *image)
{
	asm ("fxrstor (%0)":: "r" (image));
}

static inline void fpu_init(void)
{
	asm ("finit");
}

static inline u32 get_rdx_init_val(void)
{
	return 0x600; /* P6 family */
}

#define ASM_VMX_VMCLEAR_RAX       ".byte 0x66, 0x0f, 0xc7, 0x30"
#define ASM_VMX_VMLAUNCH          ".byte 0x0f, 0x01, 0xc2"
#define ASM_VMX_VMRESUME          ".byte 0x0f, 0x01, 0xc3"
#define ASM_VMX_VMPTRLD_RAX       ".byte 0x0f, 0xc7, 0x30"
#define ASM_VMX_VMREAD_RDX_RAX    ".byte 0x0f, 0x78, 0xd0"
#define ASM_VMX_VMWRITE_RAX_RDX   ".byte 0x0f, 0x79, 0xd0"
#define ASM_VMX_VMWRITE_RSP_RDX   ".byte 0x0f, 0x79, 0xd4"
#define ASM_VMX_VMXOFF            ".byte 0x0f, 0x01, 0xc4"
#define ASM_VMX_VMXON_RAX         ".byte 0xf3, 0x0f, 0xc7, 0x30"

#define MSR_IA32_TIME_STAMP_COUNTER		0x010

#define TSS_IOPB_BASE_OFFSET 0x66
#define TSS_BASE_SIZE 0x68
#define TSS_IOPB_SIZE (65536 / 8)
#define TSS_REDIRECTION_SIZE (256 / 8)
#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)

#endif
Commit	Line	Data
6aa8b732 AK	1	#ifndef __KVM_H
	2	#define __KVM_H
	3
	4	/*
	5	* This work is licensed under the terms of the GNU GPL, version 2. See
	6	* the COPYING file in the top-level directory.
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/list.h>
	11	#include <linux/mutex.h>
	12	#include <linux/spinlock.h>
	13	#include <linux/mm.h>
	14
	15	#include "vmx.h"
	16	#include <linux/kvm.h>
102d8325	17	#include <linux/kvm_para.h>
6aa8b732 AK	18
	19	#define CR0_PE_MASK (1ULL << 0)
	20	#define CR0_TS_MASK (1ULL << 3)
	21	#define CR0_NE_MASK (1ULL << 5)
	22	#define CR0_WP_MASK (1ULL << 16)
	23	#define CR0_NW_MASK (1ULL << 29)
	24	#define CR0_CD_MASK (1ULL << 30)
	25	#define CR0_PG_MASK (1ULL << 31)
	26
	27	#define CR3_WPT_MASK (1ULL << 3)
	28	#define CR3_PCD_MASK (1ULL << 4)
	29
	30	#define CR3_RESEVED_BITS 0x07ULL
	31	#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) \| 0x0fe7ULL)
	32	#define CR3_FLAGS_MASK ((1ULL << 5) - 1)
	33
	34	#define CR4_VME_MASK (1ULL << 0)
	35	#define CR4_PSE_MASK (1ULL << 4)
	36	#define CR4_PAE_MASK (1ULL << 5)
	37	#define CR4_PGE_MASK (1ULL << 7)
	38	#define CR4_VMXE_MASK (1ULL << 13)
	39
	40	#define KVM_GUEST_CR0_MASK \
	41	(CR0_PG_MASK \| CR0_PE_MASK \| CR0_WP_MASK \| CR0_NE_MASK \
	42	\| CR0_NW_MASK \| CR0_CD_MASK)
	43	#define KVM_VM_CR0_ALWAYS_ON \
	44	(CR0_PG_MASK \| CR0_PE_MASK \| CR0_WP_MASK \| CR0_NE_MASK)
	45	#define KVM_GUEST_CR4_MASK \
	46	(CR4_PSE_MASK \| CR4_PAE_MASK \| CR4_PGE_MASK \| CR4_VMXE_MASK \| CR4_VME_MASK)
	47	#define KVM_PMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK \| CR4_PAE_MASK)
	48	#define KVM_RMODE_VM_CR4_ALWAYS_ON (CR4_VMXE_MASK \| CR4_PAE_MASK \| CR4_VME_MASK)
	49
	50	#define INVALID_PAGE (~(hpa_t)0)
	51	#define UNMAPPED_GVA (~(gpa_t)0)
	52
	53	#define KVM_MAX_VCPUS 1
e8207547	54	#define KVM_ALIAS_SLOTS 4
6aa8b732 AK	55	#define KVM_MEMORY_SLOTS 4
6aa8b732 AK	56	#define KVM_NUM_MMU_PAGES 256
ebeace86 AK	57	#define KVM_MIN_FREE_MMU_PAGES 5
ebeace86 AK	58	#define KVM_REFILL_PAGES 25
06465c5a	59	#define KVM_MAX_CPUID_ENTRIES 40
6aa8b732 AK	60
	61	#define FX_IMAGE_SIZE 512
	62	#define FX_IMAGE_ALIGN 16
	63	#define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN)
	64
	65	#define DE_VECTOR 0
	66	#define DF_VECTOR 8
	67	#define TS_VECTOR 10
	68	#define NP_VECTOR 11
	69	#define SS_VECTOR 12
	70	#define GP_VECTOR 13
	71	#define PF_VECTOR 14
	72
	73	#define SELECTOR_TI_MASK (1 << 2)
	74	#define SELECTOR_RPL_MASK 0x03
	75
	76	#define IOPL_SHIFT 12
	77
039576c0 AK	78	#define KVM_PIO_PAGE_OFFSET 1
039576c0 AK	79
6aa8b732 AK	80	/*
	81	* Address types:
	82	*
	83	* gva - guest virtual address
	84	* gpa - guest physical address
	85	* gfn - guest frame number
	86	* hva - host virtual address
	87	* hpa - host physical address
	88	* hfn - host frame number
	89	*/
	90
	91	typedef unsigned long gva_t;
	92	typedef u64 gpa_t;
	93	typedef unsigned long gfn_t;
	94
	95	typedef unsigned long hva_t;
	96	typedef u64 hpa_t;
	97	typedef unsigned long hfn_t;
	98
cea0f0e7 AK	99	#define NR_PTE_CHAIN_ENTRIES 5
	100
	101	struct kvm_pte_chain {
	102	u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
	103	struct hlist_node link;
	104	};
	105
	106	/*
	107	* kvm_mmu_page_role, below, is defined as:
	108	*
	109	* bits 0:3 - total guest paging levels (2-4, or zero for real mode)
	110	* bits 4:7 - page table level for this shadow (1-4)
	111	* bits 8:9 - page table quadrant for 2-level guests
	112	* bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
d28c6cfb	113	* bits 17:18 - "access" - the user and writable bits of a huge page pde
cea0f0e7 AK	114	*/
	115	union kvm_mmu_page_role {
	116	unsigned word;
	117	struct {
	118	unsigned glevels : 4;
	119	unsigned level : 4;
	120	unsigned quadrant : 2;
	121	unsigned pad_for_nice_hex_output : 6;
	122	unsigned metaphysical : 1;
d28c6cfb	123	unsigned hugepage_access : 2;
cea0f0e7 AK	124	};
	125	};
	126
6aa8b732 AK	127	struct kvm_mmu_page {
6aa8b732 AK	128	struct list_head link;
cea0f0e7 AK	129	struct hlist_node hash_link;
	130
	131	/*
	132	* The following two entries are used to key the shadow page in the
	133	* hash table.
	134	*/
	135	gfn_t gfn;
	136	union kvm_mmu_page_role role;
	137
6aa8b732 AK	138	hpa_t page_hpa;
	139	unsigned long slot_bitmap; /* One bit set per slot which has memory
	140	* in this shadow page.
	141	*/
cea0f0e7	142	int multimapped; /* More than one parent_pte? */
3bb65a22	143	int root_count; /* Currently serving as active root */
cea0f0e7 AK	144	union {
	145	u64 parent_pte; / !multimapped */
	146	struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
	147	};
6aa8b732 AK	148	};
	149
	150	struct vmcs {
	151	u32 revision_id;
	152	u32 abort;
	153	char data[0];
	154	};
	155
	156	#define vmx_msr_entry kvm_msr_entry
	157
	158	struct kvm_vcpu;
	159
	160	/*
	161	* x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
	162	* 32-bit). The kvm_mmu structure abstracts the details of the current mmu
	163	* mode.
	164	*/
	165	struct kvm_mmu {
	166	void (new_cr3)(struct kvm_vcpu vcpu);
	167	int (page_fault)(struct kvm_vcpu vcpu, gva_t gva, u32 err);
6aa8b732 AK	168	void (free)(struct kvm_vcpu vcpu);
	169	gpa_t (gva_to_gpa)(struct kvm_vcpu vcpu, gva_t gva);
	170	hpa_t root_hpa;
	171	int root_level;
	172	int shadow_root_level;
17ac10ad AK	173
17ac10ad AK	174	u64 *pae_root;
6aa8b732 AK	175	};
6aa8b732 AK	176
714b93da AK	177	#define KVM_NR_MEM_OBJS 20
	178
	179	struct kvm_mmu_memory_cache {
	180	int nobjs;
	181	void *objects[KVM_NR_MEM_OBJS];
	182	};
	183
	184	/*
	185	* We don't want allocation failures within the mmu code, so we preallocate
	186	* enough memory for a single page fault in a cache.
	187	*/
6aa8b732 AK	188	struct kvm_guest_debug {
	189	int enabled;
	190	unsigned long bp[4];
	191	int singlestep;
	192	};
	193
	194	enum {
	195	VCPU_REGS_RAX = 0,
	196	VCPU_REGS_RCX = 1,
	197	VCPU_REGS_RDX = 2,
	198	VCPU_REGS_RBX = 3,
	199	VCPU_REGS_RSP = 4,
	200	VCPU_REGS_RBP = 5,
	201	VCPU_REGS_RSI = 6,
	202	VCPU_REGS_RDI = 7,
05b3e0c2	203	#ifdef CONFIG_X86_64
6aa8b732 AK	204	VCPU_REGS_R8 = 8,
	205	VCPU_REGS_R9 = 9,
	206	VCPU_REGS_R10 = 10,
	207	VCPU_REGS_R11 = 11,
	208	VCPU_REGS_R12 = 12,
	209	VCPU_REGS_R13 = 13,
	210	VCPU_REGS_R14 = 14,
	211	VCPU_REGS_R15 = 15,
	212	#endif
	213	NR_VCPU_REGS
	214	};
	215
	216	enum {
	217	VCPU_SREG_CS,
	218	VCPU_SREG_DS,
	219	VCPU_SREG_ES,
	220	VCPU_SREG_FS,
	221	VCPU_SREG_GS,
	222	VCPU_SREG_SS,
	223	VCPU_SREG_TR,
	224	VCPU_SREG_LDTR,
	225	};
	226
039576c0 AK	227	struct kvm_pio_request {
	228	unsigned long count;
	229	int cur_count;
	230	struct page *guest_pages[2];
	231	unsigned guest_page_offset;
	232	int in;
	233	int size;
	234	int string;
	235	int down;
	236	int rep;
	237	};
	238
6aa8b732 AK	239	struct kvm_vcpu {
	240	struct kvm *kvm;
	241	union {
	242	struct vmcs *vmcs;
	243	struct vcpu_svm *svm;
	244	};
	245	struct mutex mutex;
	246	int cpu;
	247	int launched;
0cc5064d	248	u64 host_tsc;
9a2bb7f4	249	struct kvm_run *run;
c1150d8c	250	int interrupt_window_open;
6aa8b732 AK	251	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
	252	#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
	253	unsigned long irq_pending[NR_IRQ_WORDS];
	254	unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
	255	unsigned long rip; /* needs vcpu_load_rsp_rip() */
	256
	257	unsigned long cr0;
	258	unsigned long cr2;
	259	unsigned long cr3;
102d8325 IM	260	gpa_t para_state_gpa;
	261	struct page *para_state_page;
	262	gpa_t hypercall_gpa;
6aa8b732 AK	263	unsigned long cr4;
6aa8b732 AK	264	unsigned long cr8;
1342d353	265	u64 pdptrs[4]; /* pae */
6aa8b732 AK	266	u64 shadow_efer;
6aa8b732 AK	267	u64 apic_base;
6f00e68f	268	u64 ia32_misc_enable_msr;
6aa8b732 AK	269	int nmsrs;
	270	struct vmx_msr_entry *guest_msrs;
	271	struct vmx_msr_entry *host_msrs;
	272
	273	struct list_head free_pages;
	274	struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES];
	275	struct kvm_mmu mmu;
	276
714b93da AK	277	struct kvm_mmu_memory_cache mmu_pte_chain_cache;
	278	struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
	279
86a5ba02 AK	280	gfn_t last_pt_write_gfn;
	281	int last_pt_write_count;
	282
6aa8b732 AK	283	struct kvm_guest_debug guest_debug;
	284
	285	char fx_buf[FX_BUF_SIZE];
	286	char *host_fx_image;
	287	char *guest_fx_image;
	288
	289	int mmio_needed;
	290	int mmio_read_completed;
	291	int mmio_is_write;
	292	int mmio_size;
	293	unsigned char mmio_data[8];
	294	gpa_t mmio_phys_addr;
039576c0 AK	295	struct kvm_pio_request pio;
039576c0 AK	296	void *pio_data;
6aa8b732	297
1961d276 AK	298	int sigset_active;
	299	sigset_t sigset;
	300
6aa8b732 AK	301	struct {
	302	int active;
	303	u8 save_iopl;
	304	struct kvm_save_segment {
	305	u16 selector;
	306	unsigned long base;
	307	u32 limit;
	308	u32 ar;
	309	} tr, es, ds, fs, gs;
	310	} rmode;
06465c5a AK	311
	312	int cpuid_nent;
	313	struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
6aa8b732 AK	314	};
6aa8b732 AK	315
e8207547 AK	316	struct kvm_mem_alias {
	317	gfn_t base_gfn;
	318	unsigned long npages;
	319	gfn_t target_gfn;
	320	};
	321
6aa8b732 AK	322	struct kvm_memory_slot {
	323	gfn_t base_gfn;
	324	unsigned long npages;
	325	unsigned long flags;
	326	struct page **phys_mem;
	327	unsigned long *dirty_bitmap;
	328	};
	329
	330	struct kvm {
	331	spinlock_t lock; /* protects everything except vcpus */
e8207547 AK	332	int naliases;
e8207547 AK	333	struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
6aa8b732 AK	334	int nmemslots;
6aa8b732 AK	335	struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
cea0f0e7 AK	336	/*
	337	* Hash table of struct kvm_mmu_page.
	338	*/
6aa8b732	339	struct list_head active_mmu_pages;
ebeace86	340	int n_free_mmu_pages;
cea0f0e7	341	struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
6aa8b732 AK	342	struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
	343	int memory_config_version;
	344	int busy;
cd4a4e53	345	unsigned long rmap_overflow;
133de902	346	struct list_head vm_list;
bccf2150	347	struct file *filp;
6aa8b732 AK	348	};
	349
	350	struct kvm_stat {
	351	u32 pf_fixed;
	352	u32 pf_guest;
	353	u32 tlb_flush;
	354	u32 invlpg;
	355
	356	u32 exits;
	357	u32 io_exits;
	358	u32 mmio_exits;
	359	u32 signal_exits;
c1150d8c DL	360	u32 irq_window_exits;
	361	u32 halt_exits;
	362	u32 request_irq_exits;
6aa8b732 AK	363	u32 irq_exits;
	364	};
	365
	366	struct descriptor_table {
	367	u16 limit;
	368	unsigned long base;
	369	} __attribute__((packed));
	370
	371	struct kvm_arch_ops {
	372	int (cpu_has_kvm_support)(void); / __init */
	373	int (disabled_by_bios)(void); / __init */
	374	void (hardware_enable)(void dummy); /* __init */
	375	void (hardware_disable)(void dummy);
	376	int (hardware_setup)(void); / __init */
	377	void (hardware_unsetup)(void); / __exit */
	378
	379	int (vcpu_create)(struct kvm_vcpu vcpu);
	380	void (vcpu_free)(struct kvm_vcpu vcpu);
	381
bccf2150	382	void (vcpu_load)(struct kvm_vcpu vcpu);
6aa8b732	383	void (vcpu_put)(struct kvm_vcpu vcpu);
774c47f1	384	void (vcpu_decache)(struct kvm_vcpu vcpu);
6aa8b732 AK	385
	386	int (set_guest_debug)(struct kvm_vcpu vcpu,
	387	struct kvm_debug_guest *dbg);
	388	int (get_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 *pdata);
	389	int (set_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 data);
	390	u64 (get_segment_base)(struct kvm_vcpu vcpu, int seg);
	391	void (get_segment)(struct kvm_vcpu vcpu,
	392	struct kvm_segment *var, int seg);
	393	void (set_segment)(struct kvm_vcpu vcpu,
	394	struct kvm_segment *var, int seg);
6aa8b732	395	void (get_cs_db_l_bits)(struct kvm_vcpu vcpu, int db, int l);
399badf3	396	void (decache_cr0_cr4_guest_bits)(struct kvm_vcpu vcpu);
6aa8b732	397	void (set_cr0)(struct kvm_vcpu vcpu, unsigned long cr0);
6aa8b732 AK	398	void (set_cr3)(struct kvm_vcpu vcpu, unsigned long cr3);
	399	void (set_cr4)(struct kvm_vcpu vcpu, unsigned long cr4);
	400	void (set_efer)(struct kvm_vcpu vcpu, u64 efer);
	401	void (get_idt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	402	void (set_idt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	403	void (get_gdt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	404	void (set_gdt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	405	unsigned long (get_dr)(struct kvm_vcpu vcpu, int dr);
	406	void (set_dr)(struct kvm_vcpu vcpu, int dr, unsigned long value,
	407	int *exception);
	408	void (cache_regs)(struct kvm_vcpu vcpu);
	409	void (decache_regs)(struct kvm_vcpu vcpu);
	410	unsigned long (get_rflags)(struct kvm_vcpu vcpu);
	411	void (set_rflags)(struct kvm_vcpu vcpu, unsigned long rflags);
	412
	413	void (invlpg)(struct kvm_vcpu vcpu, gva_t addr);
	414	void (tlb_flush)(struct kvm_vcpu vcpu);
	415	void (inject_page_fault)(struct kvm_vcpu vcpu,
	416	unsigned long addr, u32 err_code);
	417
	418	void (inject_gp)(struct kvm_vcpu vcpu, unsigned err_code);
	419
	420	int (run)(struct kvm_vcpu vcpu, struct kvm_run *run);
	421	int (vcpu_setup)(struct kvm_vcpu vcpu);
	422	void (skip_emulated_instruction)(struct kvm_vcpu vcpu);
102d8325 IM	423	void (patch_hypercall)(struct kvm_vcpu vcpu,
102d8325 IM	424	unsigned char *hypercall_addr);
6aa8b732 AK	425	};
	426
	427	extern struct kvm_stat kvm_stat;
	428	extern struct kvm_arch_ops *kvm_arch_ops;
	429
	430	#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
	431	#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
	432
	433	int kvm_init_arch(struct kvm_arch_ops ops, struct module module);
	434	void kvm_exit_arch(void);
	435
	436	void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
8018c27b IM	437	int kvm_mmu_create(struct kvm_vcpu *vcpu);
8018c27b IM	438	int kvm_mmu_setup(struct kvm_vcpu *vcpu);
6aa8b732 AK	439
6aa8b732 AK	440	int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
714b93da	441	void kvm_mmu_slot_remove_write_access(struct kvm_vcpu *vcpu, int slot);
e0fa826f	442	void kvm_mmu_zap_all(struct kvm_vcpu *vcpu);
6aa8b732 AK	443
	444	hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
	445	#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
	446	#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
	447	static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
	448	hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
039576c0	449	struct page gva_to_page(struct kvm_vcpu vcpu, gva_t gva);
6aa8b732 AK	450
	451	void kvm_emulator_want_group7_invlpg(void);
	452
	453	extern hpa_t bad_page_address;
	454
954bbbc2	455	struct page gfn_to_page(struct kvm kvm, gfn_t gfn);
6aa8b732 AK	456	struct kvm_memory_slot gfn_to_memslot(struct kvm kvm, gfn_t gfn);
	457	void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
	458
	459	enum emulation_result {
	460	EMULATE_DONE, /* no further processing */
	461	EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
	462	EMULATE_FAIL, /* can't emulate this instruction */
	463	};
	464
	465	int emulate_instruction(struct kvm_vcpu vcpu, struct kvm_run run,
	466	unsigned long cr2, u16 error_code);
	467	void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
	468	void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
	469	void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
	470	unsigned long *rflags);
	471
	472	unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
	473	void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
	474	unsigned long *rflags);
	475
	476	struct x86_emulate_ctxt;
	477
039576c0 AK	478	int kvm_setup_pio(struct kvm_vcpu vcpu, struct kvm_run run, int in,
	479	int size, unsigned long count, int string, int down,
	480	gva_t address, int rep, unsigned port);
06465c5a	481	void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
6aa8b732 AK	482	int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
	483	int emulate_clts(struct kvm_vcpu *vcpu);
	484	int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
	485	unsigned long *dest);
	486	int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
	487	unsigned long value);
	488
	489	void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
	490	void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
	491	void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
	492	void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
	493	void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
	494
3bab1f5d AK	495	int kvm_get_msr_common(struct kvm_vcpu vcpu, u32 msr, u64 pdata);
3bab1f5d AK	496	int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
6aa8b732 AK	497
	498	void fx_init(struct kvm_vcpu *vcpu);
	499
	500	void load_msrs(struct vmx_msr_entry *e, int n);
	501	void save_msrs(struct vmx_msr_entry *e, int n);
	502	void kvm_resched(struct kvm_vcpu *vcpu);
	503
	504	int kvm_read_guest(struct kvm_vcpu *vcpu,
	505	gva_t addr,
	506	unsigned long size,
	507	void *dest);
	508
	509	int kvm_write_guest(struct kvm_vcpu *vcpu,
	510	gva_t addr,
	511	unsigned long size,
	512	void *data);
	513
	514	unsigned long segment_base(u16 selector);
	515
da4a00f0 AK	516	void kvm_mmu_pre_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
da4a00f0 AK	517	void kvm_mmu_post_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
a436036b	518	int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
ebeace86 AK	519	void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
ebeace86 AK	520
270fd9b9 AK	521	int kvm_hypercall(struct kvm_vcpu vcpu, struct kvm_run run);
270fd9b9 AK	522
ebeace86 AK	523	static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
	524	u32 error_code)
	525	{
	526	if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
	527	kvm_mmu_free_some_pages(vcpu);
	528	return vcpu->mmu.page_fault(vcpu, gva, error_code);
	529	}
da4a00f0	530
a9058ecd AK	531	static inline int is_long_mode(struct kvm_vcpu *vcpu)
	532	{
	533	#ifdef CONFIG_X86_64
	534	return vcpu->shadow_efer & EFER_LME;
	535	#else
	536	return 0;
	537	#endif
	538	}
	539
6aa8b732 AK	540	static inline int is_pae(struct kvm_vcpu *vcpu)
	541	{
	542	return vcpu->cr4 & CR4_PAE_MASK;
	543	}
	544
	545	static inline int is_pse(struct kvm_vcpu *vcpu)
	546	{
	547	return vcpu->cr4 & CR4_PSE_MASK;
	548	}
	549
	550	static inline int is_paging(struct kvm_vcpu *vcpu)
	551	{
	552	return vcpu->cr0 & CR0_PG_MASK;
	553	}
	554
	555	static inline int memslot_id(struct kvm kvm, struct kvm_memory_slot slot)
	556	{
	557	return slot - kvm->memslots;
	558	}
	559
	560	static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
	561	{
	562	struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
	563
5972e953	564	return (struct kvm_mmu_page *)page_private(page);
6aa8b732 AK	565	}
	566
	567	static inline u16 read_fs(void)
	568	{
	569	u16 seg;
	570	asm ("mov %%fs, %0" : "=g"(seg));
	571	return seg;
	572	}
	573
	574	static inline u16 read_gs(void)
	575	{
	576	u16 seg;
	577	asm ("mov %%gs, %0" : "=g"(seg));
	578	return seg;
	579	}
	580
	581	static inline u16 read_ldt(void)
	582	{
	583	u16 ldt;
	584	asm ("sldt %0" : "=g"(ldt));
	585	return ldt;
	586	}
	587
	588	static inline void load_fs(u16 sel)
	589	{
	590	asm ("mov %0, %%fs" : : "rm"(sel));
	591	}
	592
	593	static inline void load_gs(u16 sel)
	594	{
	595	asm ("mov %0, %%gs" : : "rm"(sel));
	596	}
	597
	598	#ifndef load_ldt
	599	static inline void load_ldt(u16 sel)
	600	{
a0610ddf	601	asm ("lldt %0" : : "rm"(sel));
6aa8b732 AK	602	}
	603	#endif
	604
	605	static inline void get_idt(struct descriptor_table *table)
	606	{
	607	asm ("sidt %0" : "=m"(*table));
	608	}
	609
	610	static inline void get_gdt(struct descriptor_table *table)
	611	{
	612	asm ("sgdt %0" : "=m"(*table));
	613	}
	614
	615	static inline unsigned long read_tr_base(void)
	616	{
	617	u16 tr;
	618	asm ("str %0" : "=g"(tr));
	619	return segment_base(tr);
	620	}
	621
05b3e0c2	622	#ifdef CONFIG_X86_64
6aa8b732 AK	623	static inline unsigned long read_msr(unsigned long msr)
	624	{
	625	u64 value;
	626
	627	rdmsrl(msr, value);
	628	return value;
	629	}
	630	#endif
	631
	632	static inline void fx_save(void *image)
	633	{
	634	asm ("fxsave (%0)":: "r" (image));
	635	}
	636
	637	static inline void fx_restore(void *image)
	638	{
	639	asm ("fxrstor (%0)":: "r" (image));
	640	}
	641
	642	static inline void fpu_init(void)
	643	{
	644	asm ("finit");
	645	}
	646
	647	static inline u32 get_rdx_init_val(void)
	648	{
	649	return 0x600; /* P6 family */
	650	}
	651
	652	#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
	653	#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
	654	#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
	655	#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
	656	#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
	657	#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
	658	#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
	659	#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
	660	#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
	661
	662	#define MSR_IA32_TIME_STAMP_COUNTER 0x010
	663
	664	#define TSS_IOPB_BASE_OFFSET 0x66
	665	#define TSS_BASE_SIZE 0x68
	666	#define TSS_IOPB_SIZE (65536 / 8)
	667	#define TSS_REDIRECTION_SIZE (256 / 8)
	668	#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
	669
6aa8b732	670	#endif