diff options
| author | Avi Kivity <avi.kivity@gmail.com> | 2013-01-04 16:18:51 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-01-09 17:39:21 -0200 |
| commit | 75f728456f368140e6b34b6a79f3408774076325 (patch) | |
| tree | d1696391384cb0eabfd0f76ef4a012aea0ca2ff6 /arch/x86/kvm/emulate.c | |
| parent | b6744dc3fb55fda7cfcb53beecfa056f02415e6d (diff) | |
KVM: x86 emulator: mark CMP, CMPS, SCAS, TEST as NoWrite
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi.kivity@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index fe113fbb373..2af0c447560 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3069,16 +3069,12 @@ static int em_xor(struct x86_emulate_ctxt *ctxt) static int em_cmp(struct x86_emulate_ctxt *ctxt) { emulate_2op_SrcV(ctxt, "cmp"); - /* Disable writeback. */ - ctxt->dst.type = OP_NONE; return X86EMUL_CONTINUE; } static int em_test(struct x86_emulate_ctxt *ctxt) { emulate_2op_SrcV(ctxt, "test"); - /* Disable writeback. */ - ctxt->dst.type = OP_NONE; return X86EMUL_CONTINUE; } @@ -3747,7 +3743,7 @@ static const struct opcode group1[] = { I(Lock | PageTable, em_and), I(Lock, em_sub), I(Lock, em_xor), - I(0, em_cmp), + I(NoWrite, em_cmp), }; static const struct opcode group1A[] = { @@ -3755,8 +3751,8 @@ static const struct opcode group1A[] = { }; static const struct opcode group3[] = { - I(DstMem | SrcImm, em_test), - I(DstMem | SrcImm, em_test), + I(DstMem | SrcImm | NoWrite, em_test), + I(DstMem | SrcImm | NoWrite, em_test), I(DstMem | SrcNone | Lock, em_not), I(DstMem | SrcNone | Lock, em_neg), I(SrcMem, em_mul_ex), @@ -3920,7 +3916,7 @@ static const struct opcode opcode_table[256] = { /* 0x30 - 0x37 */ I6ALU(Lock, em_xor), N, N, /* 0x38 - 0x3F */ - I6ALU(0, em_cmp), N, N, + I6ALU(NoWrite, em_cmp), N, N, /* 0x40 - 0x4F */ X16(D(DstReg)), /* 0x50 - 0x57 */ @@ -3946,7 +3942,7 @@ static const struct opcode opcode_table[256] = { G(DstMem | SrcImm, group1), G(ByteOp | DstMem | SrcImm | No64, group1), G(DstMem | SrcImmByte, group1), - I2bv(DstMem | SrcReg | ModRM, em_test), + I2bv(DstMem | SrcReg | ModRM | NoWrite, em_test), I2bv(DstMem | SrcReg | ModRM | Lock | PageTable, em_xchg), /* 0x88 - 0x8F */ I2bv(DstMem | SrcReg | ModRM | Mov | PageTable, em_mov), @@ -3966,12 +3962,12 @@ static const struct opcode opcode_table[256] = { I2bv(DstAcc | SrcMem | Mov | MemAbs, em_mov), I2bv(DstMem | SrcAcc | Mov | MemAbs | PageTable, em_mov), I2bv(SrcSI | DstDI | Mov | String, em_mov), - I2bv(SrcSI | DstDI | String, em_cmp), + I2bv(SrcSI | DstDI | String | NoWrite, em_cmp), /* 0xA8 - 0xAF */ - I2bv(DstAcc | SrcImm, em_test), + I2bv(DstAcc | SrcImm | NoWrite, em_test), I2bv(SrcAcc | DstDI | Mov | String, em_mov), I2bv(SrcSI | DstAcc | Mov | String, em_mov), - I2bv(SrcAcc | DstDI | String, em_cmp), + I2bv(SrcAcc | DstDI | String | NoWrite, em_cmp), /* 0xB0 - 0xB7 */ X8(I(ByteOp | DstReg | SrcImm | Mov, em_mov)), /* 0xB8 - 0xBF */ |