drivers/kvm/x86.h - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 #/*
  * 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
	#/*
	* 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