[deliverable/linux.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 */
};

/*
 * 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)(unsigned long addr, void *val,
			unsigned int bytes, struct kvm_vcpu *vcpu,
			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)(unsigned long addr, void *val,
			 unsigned int bytes, struct kvm_vcpu *vcpu,
			 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)(unsigned long addr, void *val,
		     unsigned int bytes, struct kvm_vcpu *vcpu,
		     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)(unsigned long addr,
			     void *val,
			     unsigned int bytes,
			     struct x86_exception *fault,
			     struct kvm_vcpu *vcpu);

	/*
	 * 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)(unsigned long addr,
			      const void *val,
			      unsigned int bytes,
			      struct x86_exception *fault,
			      struct kvm_vcpu *vcpu);

	/*
	 * 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)(unsigned long addr,
				const void *old,
				const void *new,
				unsigned int bytes,
				struct x86_exception *fault,
				struct kvm_vcpu *vcpu);

	int (*pio_in_emulated)(int size, unsigned short port, void *val,
			       unsigned int count, struct kvm_vcpu *vcpu);

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

	bool (*get_cached_descriptor)(struct desc_struct *desc, u32 *base3,
				      int seg, struct kvm_vcpu *vcpu);
	void (*set_cached_descriptor)(struct desc_struct *desc, u32 base3,
				      int seg, struct kvm_vcpu *vcpu);
	u16 (*get_segment_selector)(int seg, struct kvm_vcpu *vcpu);
	void (*set_segment_selector)(u16 sel, int seg, struct kvm_vcpu *vcpu);
	unsigned long (*get_cached_segment_base)(int seg, struct kvm_vcpu *vcpu);
	void (*get_gdt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu);
	void (*get_idt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu);
	ulong (*get_cr)(int cr, struct kvm_vcpu *vcpu);
	int (*set_cr)(int cr, ulong val, struct kvm_vcpu *vcpu);
	int (*cpl)(struct kvm_vcpu *vcpu);
	int (*get_dr)(int dr, unsigned long *dest, struct kvm_vcpu *vcpu);
	int (*set_dr)(int dr, unsigned long value, struct kvm_vcpu *vcpu);
	int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
	int (*get_msr)(struct kvm_vcpu *vcpu, 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,
			 enum x86_intercept intercept,
			 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;
	u32 cs_base;

	/* 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.    */

enum x86_intercept_stage {
	X86_ICPT_PRE_EXCEPT,
	X86_ICPT_POST_EXCEPT,
	X86_ICPT_POST_MEMACCESS,
};

enum x86_intercept {
	x86_intercept_none,
	x86_intercept_lmsw,
	x86_intercept_smsw,
	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,

	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
6aa8b732 AK	28	/*
	29	* x86_emulate_ops:
	30	*
	31	* These operations represent the instruction emulator's interface to memory.
	32	* There are two categories of operation: those that act on ordinary memory
	33	* regions (*_std), and those that act on memory regions known to require
	34	* special treatment or emulation (*_emulated).
	35	*
	36	* The emulator assumes that an instruction accesses only one 'emulated memory'
	37	* location, that this location is the given linear faulting address (cr2), and
	38	* that this is one of the instruction's data operands. Instruction fetches and
	39	* stack operations are assumed never to access emulated memory. The emulator
	40	* automatically deduces which operand of a string-move operation is accessing
	41	* emulated memory, and assumes that the other operand accesses normal memory.
	42	*
	43	* NOTES:
	44	* 1. The emulator isn't very smart about emulated vs. standard memory.
	45	* 'Emulated memory' access addresses should be checked for sanity.
	46	* 'Normal memory' accesses may fault, and the caller must arrange to
	47	* detect and handle reentrancy into the emulator via recursive faults.
	48	* Accesses may be unaligned and may cross page boundaries.
	49	* 2. If the access fails (cannot emulate, or a standard access faults) then
	50	* it is up to the memop to propagate the fault to the guest VM via
	51	* some out-of-band mechanism, unknown to the emulator. The memop signals
	52	* failure by returning X86EMUL_PROPAGATE_FAULT to the emulator, which will
	53	* then immediately bail.
	54	* 3. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only
	55	* cmpxchg8b_emulated need support 8-byte accesses.
	56	* 4. The emulator cannot handle 64-bit mode emulation on an x86/32 system.
	57	*/
	58	/* Access completed successfully: continue emulation as normal. */
	59	#define X86EMUL_CONTINUE 0
	60	/* Access is unhandleable: bail from emulation and return error to caller. */
	61	#define X86EMUL_UNHANDLEABLE 1
	62	/* Terminate emulation but return success to the caller. */
	63	#define X86EMUL_PROPAGATE_FAULT 2 /* propagate a generated fault to guest */
e680080e GN	64	#define X86EMUL_RETRY_INSTR 3 /* retry the instruction for some reason */
e680080e GN	65	#define X86EMUL_CMPXCHG_FAILED 4 /* cmpxchg did not see expected value */
c3cd7ffa	66	#define X86EMUL_IO_NEEDED 5 /* IO is needed to complete emulation */
c4f035c6	67	#define X86EMUL_INTERCEPTED 6 /* Intercepted by nested VMCB/VMCS */
e680080e	68
6aa8b732 AK	69	struct x86_emulate_ops {
	70	/*
	71	* read_std: Read bytes of standard (non-emulated/special) memory.
1871c602	72	* Used for descriptor reading.
6aa8b732 AK	73	* @addr: [IN ] Linear address from which to read.
	74	* @val: [OUT] Value read from memory, zero-extended to 'u_long'.
	75	* @bytes: [IN ] Number of bytes to read from memory.
	76	*/
4c690a1e	77	int (read_std)(unsigned long addr, void val,
bcc55cba AK	78	unsigned int bytes, struct kvm_vcpu *vcpu,
bcc55cba AK	79	struct x86_exception *fault);
1871c602	80
2dafc6c2 GN	81	/*
	82	* write_std: Write bytes of standard (non-emulated/special) memory.
	83	* Used for descriptor writing.
	84	* @addr: [IN ] Linear address to which to write.
	85	* @val: [OUT] Value write to memory, zero-extended to 'u_long'.
	86	* @bytes: [IN ] Number of bytes to write to memory.
	87	*/
	88	int (write_std)(unsigned long addr, void val,
bcc55cba AK	89	unsigned int bytes, struct kvm_vcpu *vcpu,
bcc55cba AK	90	struct x86_exception *fault);
1871c602 GN	91	/*
	92	* fetch: Read bytes of standard (non-emulated/special) memory.
	93	* Used for instruction fetch.
	94	* @addr: [IN ] Linear address from which to read.
	95	* @val: [OUT] Value read from memory, zero-extended to 'u_long'.
	96	* @bytes: [IN ] Number of bytes to read from memory.
	97	*/
	98	int (fetch)(unsigned long addr, void val,
bcc55cba AK	99	unsigned int bytes, struct kvm_vcpu *vcpu,
bcc55cba AK	100	struct x86_exception *fault);
6aa8b732 AK	101
	102	/*
	103	* read_emulated: Read bytes from emulated/special memory area.
	104	* @addr: [IN ] Linear address from which to read.
	105	* @val: [OUT] Value read from memory, zero-extended to 'u_long'.
	106	* @bytes: [IN ] Number of bytes to read from memory.
	107	*/
0c7825e6 JP	108	int (*read_emulated)(unsigned long addr,
	109	void *val,
	110	unsigned int bytes,
bcc55cba	111	struct x86_exception *fault,
0c7825e6	112	struct kvm_vcpu *vcpu);
6aa8b732 AK	113
6aa8b732 AK	114	/*
0d178975	115	* write_emulated: Write bytes to emulated/special memory area.
6aa8b732 AK	116	* @addr: [IN ] Linear address to which to write.
	117	* @val: [IN ] Value to write to memory (low-order bytes used as
	118	* required).
	119	* @bytes: [IN ] Number of bytes to write to memory.
	120	*/
0c7825e6 JP	121	int (*write_emulated)(unsigned long addr,
	122	const void *val,
	123	unsigned int bytes,
bcc55cba	124	struct x86_exception *fault,
0c7825e6	125	struct kvm_vcpu *vcpu);
6aa8b732 AK	126
	127	/*
	128	* cmpxchg_emulated: Emulate an atomic (LOCKed) CMPXCHG operation on an
	129	* emulated/special memory area.
	130	* @addr: [IN ] Linear address to access.
	131	* @old: [IN ] Value expected to be current at @addr.
	132	* @new: [IN ] Value to write to @addr.
	133	* @bytes: [IN ] Number of bytes to access using CMPXCHG.
	134	*/
0c7825e6 JP	135	int (*cmpxchg_emulated)(unsigned long addr,
	136	const void *old,
	137	const void *new,
	138	unsigned int bytes,
bcc55cba	139	struct x86_exception *fault,
0c7825e6	140	struct kvm_vcpu *vcpu);
cf8f70bf GN	141
	142	int (pio_in_emulated)(int size, unsigned short port, void val,
	143	unsigned int count, struct kvm_vcpu *vcpu);
	144
	145	int (pio_out_emulated)(int size, unsigned short port, const void val,
	146	unsigned int count, struct kvm_vcpu *vcpu);
	147
5601d05b	148	bool (get_cached_descriptor)(struct desc_struct desc, u32 *base3,
2dafc6c2	149	int seg, struct kvm_vcpu *vcpu);
5601d05b	150	void (set_cached_descriptor)(struct desc_struct desc, u32 base3,
2dafc6c2 GN	151	int seg, struct kvm_vcpu *vcpu);
	152	u16 (get_segment_selector)(int seg, struct kvm_vcpu vcpu);
	153	void (set_segment_selector)(u16 sel, int seg, struct kvm_vcpu vcpu);
5951c442	154	unsigned long (get_cached_segment_base)(int seg, struct kvm_vcpu vcpu);
2dafc6c2	155	void (get_gdt)(struct desc_ptr dt, struct kvm_vcpu *vcpu);
160ce1f1	156	void (get_idt)(struct desc_ptr dt, struct kvm_vcpu *vcpu);
52a46617	157	ulong (get_cr)(int cr, struct kvm_vcpu vcpu);
0f12244f	158	int (set_cr)(int cr, ulong val, struct kvm_vcpu vcpu);
9c537244	159	int (cpl)(struct kvm_vcpu vcpu);
35aa5375 GN	160	int (get_dr)(int dr, unsigned long dest, struct kvm_vcpu *vcpu);
35aa5375 GN	161	int (set_dr)(int dr, unsigned long value, struct kvm_vcpu vcpu);
3fb1b5db GN	162	int (set_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 data);
3fb1b5db GN	163	int (get_msr)(struct kvm_vcpu vcpu, u32 msr_index, u64 *pdata);
5037f6f3 AK	164	void (get_fpu)(struct x86_emulate_ctxt ctxt); /* disables preempt */
5037f6f3 AK	165	void (put_fpu)(struct x86_emulate_ctxt ctxt); /* reenables preempt */
c4f035c6 AK	166	int (intercept)(struct x86_emulate_ctxt ctxt,
	167	enum x86_intercept intercept,
	168	enum x86_intercept_stage stage);
6aa8b732 AK	169	};
6aa8b732 AK	170
1253791d AK	171	typedef u32 __attribute__((vector_size(16))) sse128_t;
1253791d AK	172
e4e03ded LV	173	/* Type, address-of, and value of an instruction's operand. */
e4e03ded LV	174	struct operand {
1253791d	175	enum { OP_REG, OP_MEM, OP_IMM, OP_XMM, OP_NONE } type;
e4e03ded	176	unsigned int bytes;
16518d5a AK	177	union {
	178	unsigned long orig_val;
	179	u64 orig_val64;
	180	};
1a6440ae AK	181	union {
1a6440ae AK	182	unsigned long *reg;
90de84f5 AK	183	struct segmented_address {
	184	ulong ea;
	185	unsigned seg;
	186	} mem;
1253791d	187	unsigned xmm;
1a6440ae	188	} addr;
414e6277 GN	189	union {
414e6277 GN	190	unsigned long val;
16518d5a	191	u64 val64;
414e6277	192	char valptr[sizeof(unsigned long) + 2];
1253791d	193	sse128_t vec_val;
414e6277	194	};
e4e03ded LV	195	};
e4e03ded LV	196
62266869 AK	197	struct fetch_cache {
	198	u8 data[15];
	199	unsigned long start;
	200	unsigned long end;
	201	};
	202
7b262e90 GN	203	struct read_cache {
	204	u8 data[1024];
	205	unsigned long pos;
	206	unsigned long end;
	207	};
	208
e4e03ded LV	209	struct decode_cache {
	210	u8 twobyte;
	211	u8 b;
c4f035c6	212	u8 intercept;
e4e03ded LV	213	u8 lock_prefix;
	214	u8 rep_prefix;
	215	u8 op_bytes;
	216	u8 ad_bytes;
33615aa9	217	u8 rex_prefix;
e4e03ded	218	struct operand src;
0dc8d10f	219	struct operand src2;
e4e03ded	220	struct operand dst;
7a5b56df AK	221	bool has_seg_override;
7a5b56df AK	222	u8 seg_override;
e4e03ded	223	unsigned int d;
ef65c889	224	int (execute)(struct x86_emulate_ctxt ctxt);
d09beabd	225	int (check_perm)(struct x86_emulate_ctxt ctxt);
e4e03ded	226	unsigned long regs[NR_VCPU_REGS];
063db061	227	unsigned long eip;
e4e03ded LV	228	/* modrm */
	229	u8 modrm;
	230	u8 modrm_mod;
	231	u8 modrm_reg;
	232	u8 modrm_rm;
09ee57cd	233	u8 modrm_seg;
f5b4edcd	234	bool rip_relative;
62266869	235	struct fetch_cache fetch;
7b262e90	236	struct read_cache io_read;
9de41573	237	struct read_cache mem_read;
e4e03ded LV	238	};
e4e03ded LV	239
6aa8b732	240	struct x86_emulate_ctxt {
9aabc88f AK	241	struct x86_emulate_ops *ops;
9aabc88f AK	242
6aa8b732 AK	243	/* Register state before/after emulation. */
	244	struct kvm_vcpu *vcpu;
	245
6aa8b732	246	unsigned long eflags;
063db061	247	unsigned long eip; /* eip before instruction emulation */
6aa8b732 AK	248	/* Emulated execution mode, represented by an X86EMUL_MODE value. */
6aa8b732 AK	249	int mode;
7a5b56df	250	u32 cs_base;
e4e03ded	251
310b5d30 GC	252	/* interruptibility state, as a result of execution of STI or MOV SS */
	253	int interruptibility;
	254
c4f035c6	255	bool guest_mode; /* guest running a nested guest */
4fc40f07	256	bool perm_ok; /* do not check permissions if true */
d867162c	257	bool only_vendor_specific_insn;
54b8486f	258
da9cb575 AK	259	bool have_exception;
da9cb575 AK	260	struct x86_exception exception;
54b8486f	261
e4e03ded	262	/* decode cache */
e4e03ded	263	struct decode_cache decode;
6aa8b732 AK	264	};
6aa8b732 AK	265
90e0a28f	266	/* Repeat String Operation Prefix */
1d6b114f AK	267	#define REPE_PREFIX 0xf3
1d6b114f AK	268	#define REPNE_PREFIX 0xf2
90e0a28f	269
6aa8b732 AK	270	/* Execution mode, passed to the emulator. */
6aa8b732 AK	271	#define X86EMUL_MODE_REAL 0 /* Real mode. */
a0044755	272	#define X86EMUL_MODE_VM86 1 /* Virtual 8086 mode. */
6aa8b732 AK	273	#define X86EMUL_MODE_PROT16 2 /* 16-bit protected mode. */
	274	#define X86EMUL_MODE_PROT32 4 /* 32-bit protected mode. */
	275	#define X86EMUL_MODE_PROT64 8 /* 64-bit (long) mode. */
	276
c4f035c6 AK	277	enum x86_intercept_stage {
	278	X86_ICPT_PRE_EXCEPT,
	279	X86_ICPT_POST_EXCEPT,
	280	X86_ICPT_POST_MEMACCESS,
	281	};
	282
	283	enum x86_intercept {
	284	x86_intercept_none,
3c6e276f AK	285	x86_intercept_lmsw,
	286	x86_intercept_smsw,
	287	x86_intercept_lidt,
	288	x86_intercept_sidt,
	289	x86_intercept_lgdt,
	290	x86_intercept_sgdt,
	291	x86_intercept_lldt,
	292	x86_intercept_sldt,
	293	x86_intercept_ltr,
	294	x86_intercept_str,
	295	x86_intercept_rdtsc,
	296	x86_intercept_rdpmc,
	297	x86_intercept_pushf,
	298	x86_intercept_popf,
	299	x86_intercept_cpuid,
	300	x86_intercept_rsm,
	301	x86_intercept_iret,
	302	x86_intercept_intn,
	303	x86_intercept_invd,
	304	x86_intercept_pause,
	305	x86_intercept_hlt,
	306	x86_intercept_invlpg,
	307	x86_intercept_invlpga,
	308	x86_intercept_vmrun,
	309	x86_intercept_vmload,
	310	x86_intercept_vmsave,
	311	x86_intercept_vmmcall,
	312	x86_intercept_stgi,
	313	x86_intercept_clgi,
	314	x86_intercept_skinit,
	315	x86_intercept_rdtscp,
	316	x86_intercept_icebp,
	317	x86_intercept_wbinvd,
	318	x86_intercept_monitor,
	319	x86_intercept_mwait,
c4f035c6 AK	320
	321	nr_x86_intercepts
	322	};
	323
6aa8b732	324	/* Host execution mode. */
d73fa29a	325	#if defined(CONFIG_X86_32)
6aa8b732	326	#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT32
05b3e0c2	327	#elif defined(CONFIG_X86_64)
6aa8b732 AK	328	#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64
	329	#endif
	330
dc25e89e	331	int x86_decode_insn(struct x86_emulate_ctxt ctxt, void insn, int insn_len);
d2ddd1c4 GN	332	#define EMULATION_FAILED -1
	333	#define EMULATION_OK 0
	334	#define EMULATION_RESTART 1
775fde86	335	#define EMULATION_INTERCEPTED 2
9aabc88f	336	int x86_emulate_insn(struct x86_emulate_ctxt *ctxt);
38ba30ba	337	int emulator_task_switch(struct x86_emulate_ctxt *ctxt,
e269fb21 JK	338	u16 tss_selector, int reason,
e269fb21 JK	339	bool has_error_code, u32 error_code);
4ab8e024 MG	340	int emulate_int_real(struct x86_emulate_ctxt *ctxt,
4ab8e024 MG	341	struct x86_emulate_ops *ops, int irq);
1965aae3	342	#endif /* _ASM_X86_KVM_X86_EMULATE_H */