[linux-block.git] / drivers / kvm / x86.h

#/*
 * Kernel-based Virtual Machine driver for Linux
 *
 * This header defines architecture specific interfaces, x86 version
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
 */

#ifndef KVM_X86_H
#define KVM_X86_H

#include "kvm.h"
#include "irq.h"

#include <linux/types.h>
#include <linux/mm.h>

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

#include <asm/desc.h>

#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)

#define KVM_GUEST_CR0_MASK \
	(X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
	 | X86_CR0_NW | X86_CR0_CD)
#define KVM_VM_CR0_ALWAYS_ON \
	(X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
	 | X86_CR0_MP)
#define KVM_GUEST_CR4_MASK \
	(X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)

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

#define DE_VECTOR 0
#define UD_VECTOR 6
#define NM_VECTOR 7
#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

extern spinlock_t kvm_lock;
extern struct list_head vm_list;

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,
};

#include "x86_emulate.h"

struct kvm_vcpu {
	KVM_VCPU_COMM;
	u64 host_tsc;
	int interrupt_window_open;
	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
	DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
	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;
	unsigned long cr4;
	unsigned long cr8;
	u64 pdptrs[4]; /* pae */
	u64 shadow_efer;
	u64 apic_base;
	struct kvm_lapic *apic;    /* kernel irqchip context */
#define VCPU_MP_STATE_RUNNABLE          0
#define VCPU_MP_STATE_UNINITIALIZED     1
#define VCPU_MP_STATE_INIT_RECEIVED     2
#define VCPU_MP_STATE_SIPI_RECEIVED     3
#define VCPU_MP_STATE_HALTED            4
	int mp_state;
	int sipi_vector;
	u64 ia32_misc_enable_msr;

	struct kvm_mmu mmu;

	struct kvm_mmu_memory_cache mmu_pte_chain_cache;
	struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
	struct kvm_mmu_memory_cache mmu_page_cache;
	struct kvm_mmu_memory_cache mmu_page_header_cache;

	gfn_t last_pt_write_gfn;
	int   last_pt_write_count;
	u64  *last_pte_updated;


	struct i387_fxsave_struct host_fx_image;
	struct i387_fxsave_struct guest_fx_image;

	gva_t mmio_fault_cr2;
	struct kvm_pio_request pio;
	void *pio_data;

	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 halt_request; /* real mode on Intel only */

	int cpuid_nent;
	struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];

	/* emulate context */

	struct x86_emulate_ctxt emulate_ctxt;
};

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

struct kvm_x86_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);
	void (*check_processor_compatibility)(void *rtn);
	int (*hardware_setup)(void);               /* __init */
	void (*hardware_unsetup)(void);            /* __exit */

	/* Create, but do not attach this VCPU */
	struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
	void (*vcpu_free)(struct kvm_vcpu *vcpu);
	int (*vcpu_reset)(struct kvm_vcpu *vcpu);

	void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
	void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
	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);
	void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
	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_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 (*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);

	void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
	int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
	void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
	void (*patch_hypercall)(struct kvm_vcpu *vcpu,
				unsigned char *hypercall_addr);
	int (*get_irq)(struct kvm_vcpu *vcpu);
	void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
	void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
	void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
				       struct kvm_run *run);

	int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
};

extern struct kvm_x86_ops *kvm_x86_ops;

int kvm_mmu_module_init(void);
void kvm_mmu_module_exit(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);
void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);

int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
void kvm_mmu_zap_all(struct kvm *kvm);
unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);

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, int no_decode);
void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
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);
int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);

struct x86_emulate_ctxt;

int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
		     int size, unsigned port);
int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
			   int size, unsigned long count, int down,
			    gva_t address, int rep, unsigned port);
void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
int kvm_emulate_halt(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);
unsigned long get_cr8(struct kvm_vcpu *vcpu);
void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);

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);

int emulator_read_std(unsigned long addr,
		      void *val,
		      unsigned int bytes,
		      struct kvm_vcpu *vcpu);
int emulator_write_emulated(unsigned long addr,
			    const void *val,
			    unsigned int bytes,
			    struct kvm_vcpu *vcpu);

unsigned long segment_base(u16 selector);

void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
		       const u8 *new, 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_mmu_load(struct kvm_vcpu *vcpu);
void kvm_mmu_unload(struct kvm_vcpu *vcpu);

int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);

int kvm_fix_hypercall(struct kvm_vcpu *vcpu);

int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);

static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
{
	if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
		__kvm_mmu_free_some_pages(vcpu);
}

static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
{
	if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
		return 0;

	return kvm_mmu_load(vcpu);
}

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 & X86_CR4_PAE;
}

static inline int is_pse(struct kvm_vcpu *vcpu)
{
	return vcpu->cr4 & X86_CR4_PSE;
}

static inline int is_paging(struct kvm_vcpu *vcpu)
{
	return vcpu->cr0 & X86_CR0_PG;
}

int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
int complete_pio(struct kvm_vcpu *vcpu);

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(struct i387_fxsave_struct *image)
{
	asm("fxsave (%0)":: "r" (image));
}

static inline void fx_restore(struct i387_fxsave_struct *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)

static inline int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
	return vcpu->mp_state == VCPU_MP_STATE_RUNNABLE
	       || vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED;
}

#endif
Commit	Line	Data
043405e1 CO	1	#/*
	2	* Kernel-based Virtual Machine driver for Linux
	3	*
	4	* This header defines architecture specific interfaces, x86 version
	5	*
	6	* This work is licensed under the terms of the GNU GPL, version 2. See
	7	* the COPYING file in the top-level directory.
	8	*
	9	*/
	10
	11	#ifndef KVM_X86_H
	12	#define KVM_X86_H
	13
	14	#include "kvm.h"
e01a1b57	15	#include "irq.h"
043405e1	16
34c16eec ZX	17	#include <linux/types.h>
	18	#include <linux/mm.h>
	19
	20	#include <linux/kvm.h>
	21	#include <linux/kvm_para.h>
	22
e01a1b57 HB	23	#include <asm/desc.h>
e01a1b57 HB	24
cd6e8f87 ZX	25	#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT \| X86_CR3_PCD) - 1)
	26	#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT \| X86_CR3_PCD))
	27	#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS\|0xFFFFFF0000000000ULL)
	28
	29	#define KVM_GUEST_CR0_MASK \
	30	(X86_CR0_PG \| X86_CR0_PE \| X86_CR0_WP \| X86_CR0_NE \
	31	\| X86_CR0_NW \| X86_CR0_CD)
	32	#define KVM_VM_CR0_ALWAYS_ON \
	33	(X86_CR0_PG \| X86_CR0_PE \| X86_CR0_WP \| X86_CR0_NE \| X86_CR0_TS \
	34	\| X86_CR0_MP)
	35	#define KVM_GUEST_CR4_MASK \
	36	(X86_CR4_VME \| X86_CR4_PSE \| X86_CR4_PAE \| X86_CR4_PGE \| X86_CR4_VMXE)
	37	#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE \| X86_CR4_VMXE)
	38	#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME \| X86_CR4_PAE \| X86_CR4_VMXE)
	39
	40	#define INVALID_PAGE (~(hpa_t)0)
	41	#define UNMAPPED_GVA (~(gpa_t)0)
	42
	43	#define DE_VECTOR 0
	44	#define UD_VECTOR 6
	45	#define NM_VECTOR 7
	46	#define DF_VECTOR 8
	47	#define TS_VECTOR 10
	48	#define NP_VECTOR 11
	49	#define SS_VECTOR 12
	50	#define GP_VECTOR 13
	51	#define PF_VECTOR 14
	52
	53	#define SELECTOR_TI_MASK (1 << 2)
	54	#define SELECTOR_RPL_MASK 0x03
	55
	56	#define IOPL_SHIFT 12
	57
e9b11c17 ZX	58	extern spinlock_t kvm_lock;
	59	extern struct list_head vm_list;
	60
2b3ccfa0 ZX	61	enum {
	62	VCPU_REGS_RAX = 0,
	63	VCPU_REGS_RCX = 1,
	64	VCPU_REGS_RDX = 2,
	65	VCPU_REGS_RBX = 3,
	66	VCPU_REGS_RSP = 4,
	67	VCPU_REGS_RBP = 5,
	68	VCPU_REGS_RSI = 6,
	69	VCPU_REGS_RDI = 7,
	70	#ifdef CONFIG_X86_64
	71	VCPU_REGS_R8 = 8,
	72	VCPU_REGS_R9 = 9,
	73	VCPU_REGS_R10 = 10,
	74	VCPU_REGS_R11 = 11,
	75	VCPU_REGS_R12 = 12,
	76	VCPU_REGS_R13 = 13,
	77	VCPU_REGS_R14 = 14,
	78	VCPU_REGS_R15 = 15,
	79	#endif
	80	NR_VCPU_REGS
	81	};
	82
	83	enum {
	84	VCPU_SREG_CS,
	85	VCPU_SREG_DS,
	86	VCPU_SREG_ES,
	87	VCPU_SREG_FS,
	88	VCPU_SREG_GS,
	89	VCPU_SREG_SS,
	90	VCPU_SREG_TR,
	91	VCPU_SREG_LDTR,
	92	};
	93
	94	#include "x86_emulate.h"
	95
34c16eec ZX	96	struct kvm_vcpu {
	97	KVM_VCPU_COMM;
	98	u64 host_tsc;
	99	int interrupt_window_open;
	100	unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
	101	DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
	102	unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
	103	unsigned long rip; /* needs vcpu_load_rsp_rip() */
	104
	105	unsigned long cr0;
	106	unsigned long cr2;
	107	unsigned long cr3;
	108	unsigned long cr4;
	109	unsigned long cr8;
	110	u64 pdptrs[4]; /* pae */
	111	u64 shadow_efer;
	112	u64 apic_base;
	113	struct kvm_lapic apic; / kernel irqchip context */
	114	#define VCPU_MP_STATE_RUNNABLE 0
	115	#define VCPU_MP_STATE_UNINITIALIZED 1
	116	#define VCPU_MP_STATE_INIT_RECEIVED 2
	117	#define VCPU_MP_STATE_SIPI_RECEIVED 3
	118	#define VCPU_MP_STATE_HALTED 4
	119	int mp_state;
	120	int sipi_vector;
	121	u64 ia32_misc_enable_msr;
	122
	123	struct kvm_mmu mmu;
	124
	125	struct kvm_mmu_memory_cache mmu_pte_chain_cache;
	126	struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
	127	struct kvm_mmu_memory_cache mmu_page_cache;
	128	struct kvm_mmu_memory_cache mmu_page_header_cache;
	129
	130	gfn_t last_pt_write_gfn;
	131	int last_pt_write_count;
	132	u64 *last_pte_updated;
	133
	134
	135	struct i387_fxsave_struct host_fx_image;
	136	struct i387_fxsave_struct guest_fx_image;
	137
	138	gva_t mmio_fault_cr2;
	139	struct kvm_pio_request pio;
	140	void *pio_data;
	141
	142	struct {
	143	int active;
	144	u8 save_iopl;
	145	struct kvm_save_segment {
	146	u16 selector;
	147	unsigned long base;
	148	u32 limit;
	149	u32 ar;
	150	} tr, es, ds, fs, gs;
	151	} rmode;
	152	int halt_request; /* real mode on Intel only */
	153
	154	int cpuid_nent;
07716717	155	struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
34c16eec ZX	156
	157	/* emulate context */
	158
	159	struct x86_emulate_ctxt emulate_ctxt;
	160	};
	161
e01a1b57 HB	162	struct descriptor_table {
	163	u16 limit;
	164	unsigned long base;
	165	} __attribute__((packed));
	166
ea4a5ff8 ZX	167	struct kvm_x86_ops {
	168	int (cpu_has_kvm_support)(void); / __init */
	169	int (disabled_by_bios)(void); / __init */
	170	void (hardware_enable)(void dummy); /* __init */
	171	void (hardware_disable)(void dummy);
	172	void (check_processor_compatibility)(void rtn);
	173	int (hardware_setup)(void); / __init */
	174	void (hardware_unsetup)(void); / __exit */
	175
	176	/* Create, but do not attach this VCPU */
	177	struct kvm_vcpu (vcpu_create)(struct kvm *kvm, unsigned id);
	178	void (vcpu_free)(struct kvm_vcpu vcpu);
	179	int (vcpu_reset)(struct kvm_vcpu vcpu);
	180
	181	void (prepare_guest_switch)(struct kvm_vcpu vcpu);
	182	void (vcpu_load)(struct kvm_vcpu vcpu, int cpu);
	183	void (vcpu_put)(struct kvm_vcpu vcpu);
	184	void (vcpu_decache)(struct kvm_vcpu vcpu);
	185
	186	int (set_guest_debug)(struct kvm_vcpu vcpu,
	187	struct kvm_debug_guest *dbg);
	188	void (guest_debug_pre)(struct kvm_vcpu vcpu);
	189	int (get_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 *pdata);
	190	int (set_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 data);
	191	u64 (get_segment_base)(struct kvm_vcpu vcpu, int seg);
	192	void (get_segment)(struct kvm_vcpu vcpu,
	193	struct kvm_segment *var, int seg);
	194	void (set_segment)(struct kvm_vcpu vcpu,
	195	struct kvm_segment *var, int seg);
	196	void (get_cs_db_l_bits)(struct kvm_vcpu vcpu, int db, int l);
	197	void (decache_cr4_guest_bits)(struct kvm_vcpu vcpu);
	198	void (set_cr0)(struct kvm_vcpu vcpu, unsigned long cr0);
	199	void (set_cr3)(struct kvm_vcpu vcpu, unsigned long cr3);
	200	void (set_cr4)(struct kvm_vcpu vcpu, unsigned long cr4);
	201	void (set_efer)(struct kvm_vcpu vcpu, u64 efer);
	202	void (get_idt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	203	void (set_idt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	204	void (get_gdt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	205	void (set_gdt)(struct kvm_vcpu vcpu, struct descriptor_table *dt);
	206	unsigned long (get_dr)(struct kvm_vcpu vcpu, int dr);
	207	void (set_dr)(struct kvm_vcpu vcpu, int dr, unsigned long value,
	208	int *exception);
	209	void (cache_regs)(struct kvm_vcpu vcpu);
	210	void (decache_regs)(struct kvm_vcpu vcpu);
	211	unsigned long (get_rflags)(struct kvm_vcpu vcpu);
	212	void (set_rflags)(struct kvm_vcpu vcpu, unsigned long rflags);
	213
	214	void (tlb_flush)(struct kvm_vcpu vcpu);
	215	void (inject_page_fault)(struct kvm_vcpu vcpu,
	216	unsigned long addr, u32 err_code);
	217
	218	void (inject_gp)(struct kvm_vcpu vcpu, unsigned err_code);
	219
	220	void (run)(struct kvm_vcpu vcpu, struct kvm_run *run);
	221	int (handle_exit)(struct kvm_run run, struct kvm_vcpu *vcpu);
	222	void (skip_emulated_instruction)(struct kvm_vcpu vcpu);
	223	void (patch_hypercall)(struct kvm_vcpu vcpu,
	224	unsigned char *hypercall_addr);
	225	int (get_irq)(struct kvm_vcpu vcpu);
	226	void (set_irq)(struct kvm_vcpu vcpu, int vec);
	227	void (inject_pending_irq)(struct kvm_vcpu vcpu);
	228	void (inject_pending_vectors)(struct kvm_vcpu vcpu,
	229	struct kvm_run *run);
	230
231	int (set_tss_addr)(struct kvm kvm, unsigned int addr);
232	};
233
97896d04 ZX	234	extern struct kvm_x86_ops *kvm_x86_ops;
97896d04 ZX	235
54f1585a ZX	236	int kvm_mmu_module_init(void);
	237	void kvm_mmu_module_exit(void);
	238
	239	void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
	240	int kvm_mmu_create(struct kvm_vcpu *vcpu);
	241	int kvm_mmu_setup(struct kvm_vcpu *vcpu);
	242	void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
	243
	244	int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
	245	void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
	246	void kvm_mmu_zap_all(struct kvm *kvm);
3ad82a7e	247	unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
54f1585a ZX	248	void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
	249
	250	enum emulation_result {
	251	EMULATE_DONE, /* no further processing */
	252	EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
	253	EMULATE_FAIL, /* can't emulate this instruction */
	254	};
	255
	256	int emulate_instruction(struct kvm_vcpu vcpu, struct kvm_run run,
	257	unsigned long cr2, u16 error_code, int no_decode);
	258	void kvm_report_emulation_failure(struct kvm_vcpu cvpu, const char context);
	259	void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
	260	void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
	261	void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
	262	unsigned long *rflags);
	263
	264	unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
	265	void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
	266	unsigned long *rflags);
	267	int kvm_get_msr(struct kvm_vcpu vcpu, u32 msr_index, u64 data);
	268	int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
	269
	270	struct x86_emulate_ctxt;
	271
	272	int kvm_emulate_pio(struct kvm_vcpu vcpu, struct kvm_run run, int in,
	273	int size, unsigned port);
	274	int kvm_emulate_pio_string(struct kvm_vcpu vcpu, struct kvm_run run, int in,
	275	int size, unsigned long count, int down,
	276	gva_t address, int rep, unsigned port);
	277	void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
	278	int kvm_emulate_halt(struct kvm_vcpu *vcpu);
	279	int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
	280	int emulate_clts(struct kvm_vcpu *vcpu);
	281	int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
	282	unsigned long *dest);
	283	int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
	284	unsigned long value);
	285
	286	void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
	287	void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
	288	void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
	289	void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
	290	unsigned long get_cr8(struct kvm_vcpu *vcpu);
	291	void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
	292	void kvm_get_cs_db_l_bits(struct kvm_vcpu vcpu, int db, int *l);
	293
	294	int kvm_get_msr_common(struct kvm_vcpu vcpu, u32 msr, u64 pdata);
	295	int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
	296
	297	void fx_init(struct kvm_vcpu *vcpu);
	298
	299	int emulator_read_std(unsigned long addr,
	300	void *val,
	301	unsigned int bytes,
	302	struct kvm_vcpu *vcpu);
	303	int emulator_write_emulated(unsigned long addr,
	304	const void *val,
	305	unsigned int bytes,
	306	struct kvm_vcpu *vcpu);
	307
	308	unsigned long segment_base(u16 selector);
	309
d835dfec	310	void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
54f1585a ZX	311	void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
	312	const u8 *new, int bytes);
	313	int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
	314	void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
	315	int kvm_mmu_load(struct kvm_vcpu *vcpu);
	316	void kvm_mmu_unload(struct kvm_vcpu *vcpu);
	317
	318	int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
	319
	320	int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
	321
3067714c	322	int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
34c16eec ZX	323
	324	static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
	325	{
	326	if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
	327	__kvm_mmu_free_some_pages(vcpu);
	328	}
	329
	330	static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
	331	{
	332	if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
	333	return 0;
	334
	335	return kvm_mmu_load(vcpu);
	336	}
	337
	338	static inline int is_long_mode(struct kvm_vcpu *vcpu)
	339	{
	340	#ifdef CONFIG_X86_64
	341	return vcpu->shadow_efer & EFER_LME;
	342	#else
	343	return 0;
	344	#endif
	345	}
	346
	347	static inline int is_pae(struct kvm_vcpu *vcpu)
	348	{
	349	return vcpu->cr4 & X86_CR4_PAE;
	350	}
	351
	352	static inline int is_pse(struct kvm_vcpu *vcpu)
	353	{
	354	return vcpu->cr4 & X86_CR4_PSE;
	355	}
	356
	357	static inline int is_paging(struct kvm_vcpu *vcpu)
	358	{
	359	return vcpu->cr0 & X86_CR0_PG;
	360	}
	361
a03490ed	362	int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
de7d789a	363	int complete_pio(struct kvm_vcpu *vcpu);
ec6d273d ZX	364
	365	static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
	366	{
	367	struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
	368
	369	return (struct kvm_mmu_page *)page_private(page);
	370	}
	371
	372	static inline u16 read_fs(void)
	373	{
	374	u16 seg;
	375	asm("mov %%fs, %0" : "=g"(seg));
	376	return seg;
	377	}
	378
	379	static inline u16 read_gs(void)
	380	{
	381	u16 seg;
	382	asm("mov %%gs, %0" : "=g"(seg));
	383	return seg;
	384	}
	385
	386	static inline u16 read_ldt(void)
	387	{
	388	u16 ldt;
	389	asm("sldt %0" : "=g"(ldt));
	390	return ldt;
	391	}
	392
	393	static inline void load_fs(u16 sel)
	394	{
	395	asm("mov %0, %%fs" : : "rm"(sel));
	396	}
	397
	398	static inline void load_gs(u16 sel)
	399	{
	400	asm("mov %0, %%gs" : : "rm"(sel));
	401	}
	402
	403	#ifndef load_ldt
	404	static inline void load_ldt(u16 sel)
	405	{
	406	asm("lldt %0" : : "rm"(sel));
	407	}
	408	#endif
	409
	410	static inline void get_idt(struct descriptor_table *table)
	411	{
	412	asm("sidt %0" : "=m"(*table));
	413	}
	414
	415	static inline void get_gdt(struct descriptor_table *table)
	416	{
	417	asm("sgdt %0" : "=m"(*table));
	418	}
	419
	420	static inline unsigned long read_tr_base(void)
	421	{
	422	u16 tr;
	423	asm("str %0" : "=g"(tr));
	424	return segment_base(tr);
	425	}
	426
	427	#ifdef CONFIG_X86_64
428	static inline unsigned long read_msr(unsigned long msr)
429	{
430	u64 value;
431
432	rdmsrl(msr, value);
433	return value;
434	}
435	#endif
436
437	static inline void fx_save(struct i387_fxsave_struct *image)
438	{
439	asm("fxsave (%0)":: "r" (image));
440	}
441
442	static inline void fx_restore(struct i387_fxsave_struct *image)
443	{
444	asm("fxrstor (%0)":: "r" (image));
445	}
446
447	static inline void fpu_init(void)
448	{
449	asm("finit");
450	}
451
452	static inline u32 get_rdx_init_val(void)
453	{
454	return 0x600; /* P6 family */
455	}
456
457	#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
458	#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
459	#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
460	#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
461	#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
462	#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
463	#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
464	#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
465	#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
466
467	#define MSR_IA32_TIME_STAMP_COUNTER 0x010
468
469	#define TSS_IOPB_BASE_OFFSET 0x66
470	#define TSS_BASE_SIZE 0x68
471	#define TSS_IOPB_SIZE (65536 / 8)
472	#define TSS_REDIRECTION_SIZE (256 / 8)
473	#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
53e0aa7b HB	474
	475	static inline int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
	476	{
	477	return vcpu->mp_state == VCPU_MP_STATE_RUNNABLE
	478	\|\| vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED;
	479	}
	480
043405e1	481	#endif