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KVM: x86 emulator: expand decode flags to 64 bits

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Unifiying the operands means not taking advantage of the fact that some
operand types can only go into certain operands (for example, DI can only
be used by the destination), so we need more bits to hold the operand type.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2011-09-13 10:45:42 +03:00
parent a99455499a
commit b1ea50b2b6
2 changed files with 20 additions and 20 deletions
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2
arch/x86/include/asm/kvm_emulate.h
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@ -262,7 +262,7 @@ struct x86_emulate_ctxt {
struct operand dst;
bool has_seg_override;
u8 seg_override;
unsigned int d;
u64 d;
int (*execute)(struct x86_emulate_ctxt *ctxt);
int (*check_perm)(struct x86_emulate_ctxt *ctxt);
/* modrm */

38
arch/x86/kvm/emulate.c
View File

@ -31,18 +31,18 @@
/*
* Operand types
*/
#define OpNone 0
#define OpImplicit 1 /* No generic decode */
#define OpReg 2 /* Register */
#define OpMem 3 /* Memory */
#define OpAcc 4 /* Accumulator: AL/AX/EAX/RAX */
#define OpDI 5 /* ES:DI/EDI/RDI */
#define OpMem64 6 /* Memory, 64-bit */
#define OpImmUByte 7 /* Zero-extended 8-bit immediate */
#define OpDX 8 /* DX register */
#define OpNone 0ull
#define OpImplicit 1ull /* No generic decode */
#define OpReg 2ull /* Register */
#define OpMem 3ull /* Memory */
#define OpAcc 4ull /* Accumulator: AL/AX/EAX/RAX */
#define OpDI 5ull /* ES:DI/EDI/RDI */
#define OpMem64 6ull /* Memory, 64-bit */
#define OpImmUByte 7ull /* Zero-extended 8-bit immediate */
#define OpDX 8ull /* DX register */
#define OpBits 4 /* Width of operand field */
#define OpMask ((1 << OpBits) - 1)
#define OpMask ((1ull << OpBits) - 1)
/*
* Opcode effective-address decode tables.
@ -108,12 +108,12 @@
#define Priv (1<<27) /* instruction generates #GP if current CPL != 0 */
#define No64 (1<<28)
/* Source 2 operand type */
#define Src2None (0<<29)
#define Src2CL (1<<29)
#define Src2ImmByte (2<<29)
#define Src2One (3<<29)
#define Src2Imm (4<<29)
#define Src2Mask (7<<29)
#define Src2None (0u<<29)
#define Src2CL (1u<<29)
#define Src2ImmByte (2u<<29)
#define Src2One (3u<<29)
#define Src2Imm (4u<<29)
#define Src2Mask (7u<<29)
#define X2(x...) x, x
#define X3(x...) X2(x), x
@ -125,8 +125,8 @@
#define X16(x...) X8(x), X8(x)
struct opcode {
u32 flags;
u8 intercept;
u64 flags : 56;
u64 intercept : 8;
union {
int (*execute)(struct x86_emulate_ctxt *ctxt);
struct opcode *group;
@ -3530,7 +3530,7 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
return EMULATION_FAILED;
}
ctxt->d &= ~GroupMask;
ctxt->d &= ~(u64)GroupMask;
ctxt->d |= opcode.flags;
}