[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / kvm_emulate.h

/******************************************************************************
 * x86_emulate.h
 *
 * Generic x86 (32-bit and 64-bit) instruction decoder and emulator.
 *
 * Copyright (c) 2005 Keir Fraser
 *
 * From: xen-unstable 10676:af9809f51f81a3c43f276f00c81a52ef558afda4
 */

#ifndef _ASM_X86_KVM_X86_EMULATE_H
#define _ASM_X86_KVM_X86_EMULATE_H

#include <asm/desc_defs.h>

struct x86_emulate_ctxt;
enum x86_intercept;
enum x86_intercept_stage;

struct x86_exception {
	u8 vector;
	bool error_code_valid;
	u16 error_code;
	bool nested_page_fault;
	u64 address; /* cr2 or nested page fault gpa */
};

/*
 * This struct is used to carry enough information from the instruction
 * decoder to main KVM so that a decision can be made whether the
 * instruction needs to be intercepted or not.
 */
struct x86_instruction_info {
	u8  intercept;          /* which intercept                      */
	u8  rep_prefix;         /* rep prefix?                          */
	u8  modrm_mod;		/* mod part of modrm			*/
	u8  modrm_reg;          /* index of register used               */
	u8  modrm_rm;		/* rm part of modrm			*/
	u64 src_val;            /* value of source operand              */
	u8  src_bytes;          /* size of source operand               */
	u8  dst_bytes;          /* size of destination operand          */
	u8  ad_bytes;           /* size of src/dst address              */
	u64 next_rip;           /* rip following the instruction        */
};

/*
 * x86_emulate_ops:
 *
 * These operations represent the instruction emulator's interface to memory.
 * There are two categories of operation: those that act on ordinary memory
 * regions (*_std), and those that act on memory regions known to require
 * special treatment or emulation (*_emulated).
 *
 * The emulator assumes that an instruction accesses only one 'emulated memory'
 * location, that this location is the given linear faulting address (cr2), and
 * that this is one of the instruction's data operands. Instruction fetches and
 * stack operations are assumed never to access emulated memory. The emulator
 * automatically deduces which operand of a string-move operation is accessing
 * emulated memory, and assumes that the other operand accesses normal memory.
 *
 * NOTES:
 *  1. The emulator isn't very smart about emulated vs. standard memory.
 *     'Emulated memory' access addresses should be checked for sanity.
 *     'Normal memory' accesses may fault, and the caller must arrange to
 *     detect and handle reentrancy into the emulator via recursive faults.
 *     Accesses may be unaligned and may cross page boundaries.
 *  2. If the access fails (cannot emulate, or a standard access faults) then
 *     it is up to the memop to propagate the fault to the guest VM via
 *     some out-of-band mechanism, unknown to the emulator. The memop signals
 *     failure by returning X86EMUL_PROPAGATE_FAULT to the emulator, which will
 *     then immediately bail.
 *  3. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only
 *     cmpxchg8b_emulated need support 8-byte accesses.
 *  4. The emulator cannot handle 64-bit mode emulation on an x86/32 system.
 */
/* Access completed successfully: continue emulation as normal. */
#define X86EMUL_CONTINUE        0
/* Access is unhandleable: bail from emulation and return error to caller. */
#define X86EMUL_UNHANDLEABLE    1
/* Terminate emulation but return success to the caller. */
#define X86EMUL_PROPAGATE_FAULT 2 /* propagate a generated fault to guest */
#define X86EMUL_RETRY_INSTR     3 /* retry the instruction for some reason */
#define X86EMUL_CMPXCHG_FAILED  4 /* cmpxchg did not see expected value */
#define X86EMUL_IO_NEEDED       5 /* IO is needed to complete emulation */
#define X86EMUL_INTERCEPTED     6 /* Intercepted by nested VMCB/VMCS */

struct x86_emulate_ops {
	/*
	 * read_std: Read bytes of standard (non-emulated/special) memory.
	 *           Used for descriptor reading.
	 *  @addr:  [IN ] Linear address from which to read.
	 *  @val:   [OUT] Value read from memory, zero-extended to 'u_long'.
	 *  @bytes: [IN ] Number of bytes to read from memory.
	 */
	int (*read_std)(struct x86_emulate_ctxt *ctxt,
			unsigned long addr, void *val,
			unsigned int bytes,
			struct x86_exception *fault);

	/*
	 * write_std: Write bytes of standard (non-emulated/special) memory.
	 *            Used for descriptor writing.
	 *  @addr:  [IN ] Linear address to which to write.
	 *  @val:   [OUT] Value write to memory, zero-extended to 'u_long'.
	 *  @bytes: [IN ] Number of bytes to write to memory.
	 */
	int (*write_std)(struct x86_emulate_ctxt *ctxt,
			 unsigned long addr, void *val, unsigned int bytes,
			 struct x86_exception *fault);
	/*
	 * fetch: Read bytes of standard (non-emulated/special) memory.
	 *        Used for instruction fetch.
	 *  @addr:  [IN ] Linear address from which to read.
	 *  @val:   [OUT] Value read from memory, zero-extended to 'u_long'.
	 *  @bytes: [IN ] Number of bytes to read from memory.
	 */
	int (*fetch)(struct x86_emulate_ctxt *ctxt,
		     unsigned long addr, void *val, unsigned int bytes,
		     struct x86_exception *fault);

	/*
	 * read_emulated: Read bytes from emulated/special memory area.
	 *  @addr:  [IN ] Linear address from which to read.
	 *  @val:   [OUT] Value read from memory, zero-extended to 'u_long'.
	 *  @bytes: [IN ] Number of bytes to read from memory.
	 */
	int (*read_emulated)(struct x86_emulate_ctxt *ctxt,
			     unsigned long addr, void *val, unsigned int bytes,
			     struct x86_exception *fault);

	/*
	 * write_emulated: Write bytes to emulated/special memory area.
	 *  @addr:  [IN ] Linear address to which to write.
	 *  @val:   [IN ] Value to write to memory (low-order bytes used as
	 *                required).
	 *  @bytes: [IN ] Number of bytes to write to memory.
	 */
	int (*write_emulated)(struct x86_emulate_ctxt *ctxt,
			      unsigned long addr, const void *val,
			      unsigned int bytes,
			      struct x86_exception *fault);

	/*
	 * cmpxchg_emulated: Emulate an atomic (LOCKed) CMPXCHG operation on an
	 *                   emulated/special memory area.
	 *  @addr:  [IN ] Linear address to access.
	 *  @old:   [IN ] Value expected to be current at @addr.
	 *  @new:   [IN ] Value to write to @addr.
	 *  @bytes: [IN ] Number of bytes to access using CMPXCHG.
	 */
	int (*cmpxchg_emulated)(struct x86_emulate_ctxt *ctxt,
				unsigned long addr,
				const void *old,
				const void *new,
				unsigned int bytes,
				struct x86_exception *fault);

	int (*pio_in_emulated)(struct x86_emulate_ctxt *ctxt,
			       int size, unsigned short port, void *val,
			       unsigned int count);

	int (*pio_out_emulated)(struct x86_emulate_ctxt *ctxt,
				int size, unsigned short port, const void *val,
				unsigned int count);

	bool (*get_cached_descriptor)(struct x86_emulate_ctxt *ctxt,
				      struct desc_struct *desc, u32 *base3,
				      int seg);
	void (*set_cached_descriptor)(struct x86_emulate_ctxt *ctxt,
				      struct desc_struct *desc, u32 base3,
				      int seg);
	u16 (*get_segment_selector)(struct x86_emulate_ctxt *ctxt, int seg);
	void (*set_segment_selector)(struct x86_emulate_ctxt *ctxt,
				     u16 sel, int seg);
	unsigned long (*get_cached_segment_base)(struct x86_emulate_ctxt *ctxt,
						 int seg);
	void (*get_gdt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt);
	void (*get_idt)(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt);
	ulong (*get_cr)(struct x86_emulate_ctxt *ctxt, int cr);
	int (*set_cr)(struct x86_emulate_ctxt *ctxt, int cr, ulong val);
	int (*cpl)(struct x86_emulate_ctxt *ctxt);
	int (*get_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong *dest);
	int (*set_dr)(struct x86_emulate_ctxt *ctxt, int dr, ulong value);
	int (*set_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data);
	int (*get_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata);
	void (*get_fpu)(struct x86_emulate_ctxt *ctxt); /* disables preempt */
	void (*put_fpu)(struct x86_emulate_ctxt *ctxt); /* reenables preempt */
	int (*intercept)(struct x86_emulate_ctxt *ctxt,
			 struct x86_instruction_info *info,
			 enum x86_intercept_stage stage);
};

typedef u32 __attribute__((vector_size(16))) sse128_t;

/* Type, address-of, and value of an instruction's operand. */
struct operand {
	enum { OP_REG, OP_MEM, OP_IMM, OP_XMM, OP_NONE } type;
	unsigned int bytes;
	union {
		unsigned long orig_val;
		u64 orig_val64;
	};
	union {
		unsigned long *reg;
		struct segmented_address {
			ulong ea;
			unsigned seg;
		} mem;
		unsigned xmm;
	} addr;
	union {
		unsigned long val;
		u64 val64;
		char valptr[sizeof(unsigned long) + 2];
		sse128_t vec_val;
	};
};

struct fetch_cache {
	u8 data[15];
	unsigned long start;
	unsigned long end;
};

struct read_cache {
	u8 data[1024];
	unsigned long pos;
	unsigned long end;
};

struct decode_cache {
	u8 twobyte;
	u8 b;
	u8 intercept;
	u8 lock_prefix;
	u8 rep_prefix;
	u8 op_bytes;
	u8 ad_bytes;
	u8 rex_prefix;
	struct operand src;
	struct operand src2;
	struct operand dst;
	bool has_seg_override;
	u8 seg_override;
	unsigned int d;
	int (*execute)(struct x86_emulate_ctxt *ctxt);
	int (*check_perm)(struct x86_emulate_ctxt *ctxt);
	unsigned long regs[NR_VCPU_REGS];
	unsigned long eip;
	/* modrm */
	u8 modrm;
	u8 modrm_mod;
	u8 modrm_reg;
	u8 modrm_rm;
	u8 modrm_seg;
	bool rip_relative;
	struct fetch_cache fetch;
	struct read_cache io_read;
	struct read_cache mem_read;
};

struct x86_emulate_ctxt {
	struct x86_emulate_ops *ops;

	/* Register state before/after emulation. */
	struct kvm_vcpu *vcpu;

	unsigned long eflags;
	unsigned long eip; /* eip before instruction emulation */
	/* Emulated execution mode, represented by an X86EMUL_MODE value. */
	int mode;

	/* interruptibility state, as a result of execution of STI or MOV SS */
	int interruptibility;

	bool guest_mode; /* guest running a nested guest */
	bool perm_ok; /* do not check permissions if true */
	bool only_vendor_specific_insn;

	bool have_exception;
	struct x86_exception exception;

	/* decode cache */
	struct decode_cache decode;
};

/* Repeat String Operation Prefix */
#define REPE_PREFIX	0xf3
#define REPNE_PREFIX	0xf2

/* Execution mode, passed to the emulator. */
#define X86EMUL_MODE_REAL     0	/* Real mode.             */
#define X86EMUL_MODE_VM86     1	/* Virtual 8086 mode.     */
#define X86EMUL_MODE_PROT16   2	/* 16-bit protected mode. */
#define X86EMUL_MODE_PROT32   4	/* 32-bit protected mode. */
#define X86EMUL_MODE_PROT64   8	/* 64-bit (long) mode.    */

/* any protected mode   */
#define X86EMUL_MODE_PROT     (X86EMUL_MODE_PROT16|X86EMUL_MODE_PROT32| \
			       X86EMUL_MODE_PROT64)

enum x86_intercept_stage {
	X86_ICPT_PRE_EXCEPT,
	X86_ICPT_POST_EXCEPT,
	X86_ICPT_POST_MEMACCESS,
};

enum x86_intercept {
	x86_intercept_none,
	x86_intercept_cr_read,
	x86_intercept_cr_write,
	x86_intercept_clts,
	x86_intercept_lmsw,
	x86_intercept_smsw,
	x86_intercept_dr_read,
	x86_intercept_dr_write,
	x86_intercept_lidt,
	x86_intercept_sidt,
	x86_intercept_lgdt,
	x86_intercept_sgdt,
	x86_intercept_lldt,
	x86_intercept_sldt,
	x86_intercept_ltr,
	x86_intercept_str,
	x86_intercept_rdtsc,
	x86_intercept_rdpmc,
	x86_intercept_pushf,
	x86_intercept_popf,
	x86_intercept_cpuid,
	x86_intercept_rsm,
	x86_intercept_iret,
	x86_intercept_intn,
	x86_intercept_invd,
	x86_intercept_pause,
	x86_intercept_hlt,
	x86_intercept_invlpg,
	x86_intercept_invlpga,
	x86_intercept_vmrun,
	x86_intercept_vmload,
	x86_intercept_vmsave,
	x86_intercept_vmmcall,
	x86_intercept_stgi,
	x86_intercept_clgi,
	x86_intercept_skinit,
	x86_intercept_rdtscp,
	x86_intercept_icebp,
	x86_intercept_wbinvd,
	x86_intercept_monitor,
	x86_intercept_mwait,
	x86_intercept_rdmsr,
	x86_intercept_wrmsr,
	x86_intercept_in,
	x86_intercept_ins,
	x86_intercept_out,
	x86_intercept_outs,

	nr_x86_intercepts
};

/* Host execution mode. */
#if defined(CONFIG_X86_32)
#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT32
#elif defined(CONFIG_X86_64)
#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64
#endif

int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len);
#define EMULATION_FAILED -1
#define EMULATION_OK 0
#define EMULATION_RESTART 1
#define EMULATION_INTERCEPTED 2
int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
			 u16 tss_selector, int reason,
			 bool has_error_code, u32 error_code);
int emulate_int_real(struct x86_emulate_ctxt *ctxt,
		     struct x86_emulate_ops *ops, int irq);
#endif /* _ASM_X86_KVM_X86_EMULATE_H */
Commit	Line	Data
6aa8b732 AK	1	/******************************************************************************
	2	* x86_emulate.h
	3	*
	4	* Generic x86 (32-bit and 64-bit) instruction decoder and emulator.
	5	*
	6	* Copyright (c) 2005 Keir Fraser
	7	*
	8	* From: xen-unstable 10676:af9809f51f81a3c43f276f00c81a52ef558afda4
	9	*/
	10
1965aae3 PA	11	#ifndef _ASM_X86_KVM_X86_EMULATE_H
1965aae3 PA	12	#define _ASM_X86_KVM_X86_EMULATE_H
6aa8b732	13
38ba30ba GN	14	#include <asm/desc_defs.h>
38ba30ba GN	15
6aa8b732	16	struct x86_emulate_ctxt;
c4f035c6 AK	17	enum x86_intercept;
c4f035c6 AK	18	enum x86_intercept_stage;
6aa8b732	19
da9cb575 AK	20	struct x86_exception {
	21	u8 vector;
	22	bool error_code_valid;
	23	u16 error_code;
6389ee94 AK	24	bool nested_page_fault;
6389ee94 AK	25	u64 address; /* cr2 or nested page fault gpa */
da9cb575 AK	26	};
da9cb575 AK	27
8a76d7f2 JR	28	/*
	29	* This struct is used to carry enough information from the instruction
	30	* decoder to main KVM so that a decision can be made whether the
	31	* instruction needs to be intercepted or not.
	32	*/
	33	struct x86_instruction_info {
	34	u8 intercept; /* which intercept */
	35	u8 rep_prefix; /* rep prefix? */
	36	u8 modrm_mod; /* mod part of modrm */
	37	u8 modrm_reg; /* index of register used */
	38	u8 modrm_rm; /* rm part of modrm */
	39	u64 src_val; /* value of source operand */
	40	u8 src_bytes; /* size of source operand */
	41	u8 dst_bytes; /* size of destination operand */
	42	u8 ad_bytes; /* size of src/dst address */
	43	u64 next_rip; /* rip following the instruction */
	44	};
	45
6aa8b732 AK	46	/*
	47	* x86_emulate_ops:
	48	*
	49	* These operations represent the instruction emulator's interface to memory.
	50	* There are two categories of operation: those that act on ordinary memory
	51	* regions (*_std), and those that act on memory regions known to require
	52	* special treatment or emulation (*_emulated).
	53	*
	54	* The emulator assumes that an instruction accesses only one 'emulated memory'
	55	* location, that this location is the given linear faulting address (cr2), and
	56	* that this is one of the instruction's data operands. Instruction fetches and
	57	* stack operations are assumed never to access emulated memory. The emulator
	58	* automatically deduces which operand of a string-move operation is accessing
	59	* emulated memory, and assumes that the other operand accesses normal memory.
	60	*
	61	* NOTES:
	62	* 1. The emulator isn't very smart about emulated vs. standard memory.
	63	* 'Emulated memory' access addresses should be checked for sanity.
	64	* 'Normal memory' accesses may fault, and the caller must arrange to
	65	* detect and handle reentrancy into the emulator via recursive faults.
	66	* Accesses may be unaligned and may cross page boundaries.
	67	* 2. If the access fails (cannot emulate, or a standard access faults) then
	68	* it is up to the memop to propagate the fault to the guest VM via
	69	* some out-of-band mechanism, unknown to the emulator. The memop signals
	70	* failure by returning X86EMUL_PROPAGATE_FAULT to the emulator, which will
	71	* then immediately bail.
	72	* 3. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only
	73	* cmpxchg8b_emulated need support 8-byte accesses.
	74	* 4. The emulator cannot handle 64-bit mode emulation on an x86/32 system.
	75	*/
	76	/* Access completed successfully: continue emulation as normal. */
	77	#define X86EMUL_CONTINUE 0
	78	/* Access is unhandleable: bail from emulation and return error to caller. */
	79	#define X86EMUL_UNHANDLEABLE 1
	80	/* Terminate emulation but return success to the caller. */
	81	#define X86EMUL_PROPAGATE_FAULT 2 /* propagate a generated fault to guest */
e680080e GN	82	#define X86EMUL_RETRY_INSTR 3 /* retry the instruction for some reason */
e680080e GN	83	#define X86EMUL_CMPXCHG_FAILED 4 /* cmpxchg did not see expected value */
c3cd7ffa	84	#define X86EMUL_IO_NEEDED 5 /* IO is needed to complete emulation */
c4f035c6	85	#define X86EMUL_INTERCEPTED 6 /* Intercepted by nested VMCB/VMCS */
e680080e	86
6aa8b732 AK	87	struct x86_emulate_ops {
	88	/*
	89	* read_std: Read bytes of standard (non-emulated/special) memory.
1871c602	90	* Used for descriptor reading.
6aa8b732 AK	91	* @addr: [IN ] Linear address from which to read.
	92	* @val: [OUT] Value read from memory, zero-extended to 'u_long'.
	93	* @bytes: [IN ] Number of bytes to read from memory.
	94	*/
0f65dd70 AK	95	int (read_std)(struct x86_emulate_ctxt ctxt,
	96	unsigned long addr, void *val,
	97	unsigned int bytes,
bcc55cba	98	struct x86_exception *fault);
1871c602	99
2dafc6c2 GN	100	/*
	101	* write_std: Write bytes of standard (non-emulated/special) memory.
	102	* Used for descriptor writing.
	103	* @addr: [IN ] Linear address to which to write.
	104	* @val: [OUT] Value write to memory, zero-extended to 'u_long'.
	105	* @bytes: [IN ] Number of bytes to write to memory.
	106	*/
0f65dd70 AK	107	int (write_std)(struct x86_emulate_ctxt ctxt,
0f65dd70 AK	108	unsigned long addr, void *val, unsigned int bytes,
bcc55cba	109	struct x86_exception *fault);
1871c602 GN	110	/*
	111	* fetch: Read bytes of standard (non-emulated/special) memory.
	112	* Used for instruction fetch.
	113	* @addr: [IN ] Linear address from which to read.
	114	* @val: [OUT] Value read from memory, zero-extended to 'u_long'.
	115	* @bytes: [IN ] Number of bytes to read from memory.
	116	*/
0f65dd70 AK	117	int (fetch)(struct x86_emulate_ctxt ctxt,
0f65dd70 AK	118	unsigned long addr, void *val, unsigned int bytes,
bcc55cba	119	struct x86_exception *fault);
6aa8b732 AK	120
	121	/*
	122	* read_emulated: Read bytes from emulated/special memory area.
	123	* @addr: [IN ] Linear address from which to read.
	124	* @val: [OUT] Value read from memory, zero-extended to 'u_long'.
	125	* @bytes: [IN ] Number of bytes to read from memory.
	126	*/
0f65dd70 AK	127	int (read_emulated)(struct x86_emulate_ctxt ctxt,
	128	unsigned long addr, void *val, unsigned int bytes,
	129	struct x86_exception *fault);
6aa8b732 AK	130
6aa8b732 AK	131	/*
0d178975	132	* write_emulated: Write bytes to emulated/special memory area.
6aa8b732 AK	133	* @addr: [IN ] Linear address to which to write.
	134	* @val: [IN ] Value to write to memory (low-order bytes used as
	135	* required).
	136	* @bytes: [IN ] Number of bytes to write to memory.
	137	*/
0f65dd70 AK	138	int (write_emulated)(struct x86_emulate_ctxt ctxt,
0f65dd70 AK	139	unsigned long addr, const void *val,
0c7825e6	140	unsigned int bytes,
0f65dd70	141	struct x86_exception *fault);
6aa8b732 AK	142
	143	/*
	144	* cmpxchg_emulated: Emulate an atomic (LOCKed) CMPXCHG operation on an
	145	* emulated/special memory area.
	146	* @addr: [IN ] Linear address to access.
	147	* @old: [IN ] Value expected to be current at @addr.
	148	* @new: [IN ] Value to write to @addr.
	149	* @bytes: [IN ] Number of bytes to access using CMPXCHG.
	150	*/
0f65dd70 AK	151	int (cmpxchg_emulated)(struct x86_emulate_ctxt ctxt,
0f65dd70 AK	152	unsigned long addr,
0c7825e6 JP	153	const void *old,
	154	const void *new,
	155	unsigned int bytes,
0f65dd70	156	struct x86_exception *fault);
cf8f70bf	157
ca1d4a9e AK	158	int (pio_in_emulated)(struct x86_emulate_ctxt ctxt,
	159	int size, unsigned short port, void *val,
	160	unsigned int count);
cf8f70bf	161
ca1d4a9e AK	162	int (pio_out_emulated)(struct x86_emulate_ctxt ctxt,
	163	int size, unsigned short port, const void *val,
	164	unsigned int count);
cf8f70bf	165
4bff1e86 AK	166	bool (get_cached_descriptor)(struct x86_emulate_ctxt ctxt,
	167	struct desc_struct desc, u32 base3,
	168	int seg);
	169	void (set_cached_descriptor)(struct x86_emulate_ctxt ctxt,
	170	struct desc_struct *desc, u32 base3,
	171	int seg);
	172	u16 (get_segment_selector)(struct x86_emulate_ctxt ctxt, int seg);
	173	void (set_segment_selector)(struct x86_emulate_ctxt ctxt,
	174	u16 sel, int seg);
	175	unsigned long (get_cached_segment_base)(struct x86_emulate_ctxt ctxt,
	176	int seg);
	177	void (get_gdt)(struct x86_emulate_ctxt ctxt, struct desc_ptr *dt);
	178	void (get_idt)(struct x86_emulate_ctxt ctxt, struct desc_ptr *dt);
717746e3 AK	179	ulong (get_cr)(struct x86_emulate_ctxt ctxt, int cr);
	180	int (set_cr)(struct x86_emulate_ctxt ctxt, int cr, ulong val);
	181	int (cpl)(struct x86_emulate_ctxt ctxt);
	182	int (get_dr)(struct x86_emulate_ctxt ctxt, int dr, ulong *dest);
	183	int (set_dr)(struct x86_emulate_ctxt ctxt, int dr, ulong value);
	184	int (set_msr)(struct x86_emulate_ctxt ctxt, u32 msr_index, u64 data);
	185	int (get_msr)(struct x86_emulate_ctxt ctxt, u32 msr_index, u64 *pdata);
5037f6f3 AK	186	void (get_fpu)(struct x86_emulate_ctxt ctxt); /* disables preempt */
5037f6f3 AK	187	void (put_fpu)(struct x86_emulate_ctxt ctxt); /* reenables preempt */
2953538e	188	int (intercept)(struct x86_emulate_ctxt ctxt,
8a76d7f2	189	struct x86_instruction_info *info,
c4f035c6	190	enum x86_intercept_stage stage);
6aa8b732 AK	191	};
6aa8b732 AK	192
1253791d AK	193	typedef u32 __attribute__((vector_size(16))) sse128_t;
1253791d AK	194
e4e03ded LV	195	/* Type, address-of, and value of an instruction's operand. */
e4e03ded LV	196	struct operand {
1253791d	197	enum { OP_REG, OP_MEM, OP_IMM, OP_XMM, OP_NONE } type;
e4e03ded	198	unsigned int bytes;
16518d5a AK	199	union {
	200	unsigned long orig_val;
	201	u64 orig_val64;
	202	};
1a6440ae AK	203	union {
1a6440ae AK	204	unsigned long *reg;
90de84f5 AK	205	struct segmented_address {
	206	ulong ea;
	207	unsigned seg;
	208	} mem;
1253791d	209	unsigned xmm;
1a6440ae	210	} addr;
414e6277 GN	211	union {
414e6277 GN	212	unsigned long val;
16518d5a	213	u64 val64;
414e6277	214	char valptr[sizeof(unsigned long) + 2];
1253791d	215	sse128_t vec_val;
414e6277	216	};
e4e03ded LV	217	};
e4e03ded LV	218
62266869 AK	219	struct fetch_cache {
	220	u8 data[15];
	221	unsigned long start;
	222	unsigned long end;
	223	};
	224
7b262e90 GN	225	struct read_cache {
	226	u8 data[1024];
	227	unsigned long pos;
	228	unsigned long end;
	229	};
	230
e4e03ded LV	231	struct decode_cache {
	232	u8 twobyte;
	233	u8 b;
c4f035c6	234	u8 intercept;
e4e03ded LV	235	u8 lock_prefix;
	236	u8 rep_prefix;
	237	u8 op_bytes;
	238	u8 ad_bytes;
33615aa9	239	u8 rex_prefix;
e4e03ded	240	struct operand src;
0dc8d10f	241	struct operand src2;
e4e03ded	242	struct operand dst;
7a5b56df AK	243	bool has_seg_override;
7a5b56df AK	244	u8 seg_override;
e4e03ded	245	unsigned int d;
ef65c889	246	int (execute)(struct x86_emulate_ctxt ctxt);
d09beabd	247	int (check_perm)(struct x86_emulate_ctxt ctxt);
e4e03ded	248	unsigned long regs[NR_VCPU_REGS];
063db061	249	unsigned long eip;
e4e03ded LV	250	/* modrm */
	251	u8 modrm;
	252	u8 modrm_mod;
	253	u8 modrm_reg;
	254	u8 modrm_rm;
09ee57cd	255	u8 modrm_seg;
f5b4edcd	256	bool rip_relative;
62266869	257	struct fetch_cache fetch;
7b262e90	258	struct read_cache io_read;
9de41573	259	struct read_cache mem_read;
e4e03ded LV	260	};
e4e03ded LV	261
6aa8b732	262	struct x86_emulate_ctxt {
9aabc88f AK	263	struct x86_emulate_ops *ops;
9aabc88f AK	264
6aa8b732 AK	265	/* Register state before/after emulation. */
	266	struct kvm_vcpu *vcpu;
	267
6aa8b732	268	unsigned long eflags;
063db061	269	unsigned long eip; /* eip before instruction emulation */
6aa8b732 AK	270	/* Emulated execution mode, represented by an X86EMUL_MODE value. */
6aa8b732 AK	271	int mode;
e4e03ded	272
310b5d30 GC	273	/* interruptibility state, as a result of execution of STI or MOV SS */
	274	int interruptibility;
	275
c4f035c6	276	bool guest_mode; /* guest running a nested guest */
4fc40f07	277	bool perm_ok; /* do not check permissions if true */
d867162c	278	bool only_vendor_specific_insn;
54b8486f	279
da9cb575 AK	280	bool have_exception;
da9cb575 AK	281	struct x86_exception exception;
54b8486f	282
e4e03ded	283	/* decode cache */
e4e03ded	284	struct decode_cache decode;
6aa8b732 AK	285	};
6aa8b732 AK	286
90e0a28f	287	/* Repeat String Operation Prefix */
1d6b114f AK	288	#define REPE_PREFIX 0xf3
1d6b114f AK	289	#define REPNE_PREFIX 0xf2
90e0a28f	290
6aa8b732 AK	291	/* Execution mode, passed to the emulator. */
6aa8b732 AK	292	#define X86EMUL_MODE_REAL 0 /* Real mode. */
a0044755	293	#define X86EMUL_MODE_VM86 1 /* Virtual 8086 mode. */
6aa8b732 AK	294	#define X86EMUL_MODE_PROT16 2 /* 16-bit protected mode. */
	295	#define X86EMUL_MODE_PROT32 4 /* 32-bit protected mode. */
	296	#define X86EMUL_MODE_PROT64 8 /* 64-bit (long) mode. */
	297
8ea7d6ae JR	298	/* any protected mode */
	299	#define X86EMUL_MODE_PROT (X86EMUL_MODE_PROT16\|X86EMUL_MODE_PROT32\| \
	300	X86EMUL_MODE_PROT64)
	301
c4f035c6 AK	302	enum x86_intercept_stage {
	303	X86_ICPT_PRE_EXCEPT,
	304	X86_ICPT_POST_EXCEPT,
	305	X86_ICPT_POST_MEMACCESS,
	306	};
	307
	308	enum x86_intercept {
	309	x86_intercept_none,
cfec82cb JR	310	x86_intercept_cr_read,
	311	x86_intercept_cr_write,
	312	x86_intercept_clts,
3c6e276f AK	313	x86_intercept_lmsw,
3c6e276f AK	314	x86_intercept_smsw,
3b88e41a JR	315	x86_intercept_dr_read,
3b88e41a JR	316	x86_intercept_dr_write,
3c6e276f AK	317	x86_intercept_lidt,
	318	x86_intercept_sidt,
	319	x86_intercept_lgdt,
	320	x86_intercept_sgdt,
	321	x86_intercept_lldt,
	322	x86_intercept_sldt,
	323	x86_intercept_ltr,
	324	x86_intercept_str,
	325	x86_intercept_rdtsc,
	326	x86_intercept_rdpmc,
	327	x86_intercept_pushf,
	328	x86_intercept_popf,
	329	x86_intercept_cpuid,
	330	x86_intercept_rsm,
	331	x86_intercept_iret,
	332	x86_intercept_intn,
	333	x86_intercept_invd,
	334	x86_intercept_pause,
	335	x86_intercept_hlt,
	336	x86_intercept_invlpg,
	337	x86_intercept_invlpga,
	338	x86_intercept_vmrun,
	339	x86_intercept_vmload,
	340	x86_intercept_vmsave,
	341	x86_intercept_vmmcall,
	342	x86_intercept_stgi,
	343	x86_intercept_clgi,
	344	x86_intercept_skinit,
	345	x86_intercept_rdtscp,
	346	x86_intercept_icebp,
	347	x86_intercept_wbinvd,
	348	x86_intercept_monitor,
	349	x86_intercept_mwait,
8061252e JR	350	x86_intercept_rdmsr,
8061252e JR	351	x86_intercept_wrmsr,
f6511935 JR	352	x86_intercept_in,
	353	x86_intercept_ins,
	354	x86_intercept_out,
	355	x86_intercept_outs,
c4f035c6 AK	356
	357	nr_x86_intercepts
	358	};
	359
6aa8b732	360	/* Host execution mode. */
d73fa29a	361	#if defined(CONFIG_X86_32)
6aa8b732	362	#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT32
05b3e0c2	363	#elif defined(CONFIG_X86_64)
6aa8b732 AK	364	#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64
	365	#endif
	366
dc25e89e	367	int x86_decode_insn(struct x86_emulate_ctxt ctxt, void insn, int insn_len);
d2ddd1c4 GN	368	#define EMULATION_FAILED -1
	369	#define EMULATION_OK 0
	370	#define EMULATION_RESTART 1
775fde86	371	#define EMULATION_INTERCEPTED 2
9aabc88f	372	int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
38ba30ba	373	int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
e269fb21 JK	374	u16 tss_selector, int reason,
e269fb21 JK	375	bool has_error_code, u32 error_code);
4ab8e024 MG	376	int emulate_int_real(struct x86_emulate_ctxt *ctxt,
4ab8e024 MG	377	struct x86_emulate_ops *ops, int irq);
1965aae3	378	#endif /* _ASM_X86_KVM_X86_EMULATE_H */