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KVM: x86 emulator: cmc, clc, cli, sti

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Instruction: cmc, clc, cli, sti
opcodes: 0xf5, 0xf8, 0xfa, 0xfb respectively.

[avi: fix reference to EFLG_IF which is not defined anywhere]

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Nitin A Kamble 2007-10-16 18:23:27 -07:00 committed by Avi Kivity
parent 42bf3f0a1f
commit b284be5764
1 changed files with 19 additions and 2 deletions
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21
drivers/kvm/x86_emulate.c
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@ -161,10 +161,10 @@ static u8 opcode_table[256] = {
ImplicitOps, SrcImm|ImplicitOps, 0, SrcImmByte|ImplicitOps, 0, 0, 0, 0,
/* 0xF0 - 0xF7 */
0, 0, 0, 0,
ImplicitOps, 0,
ImplicitOps, ImplicitOps,
ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
/* 0xF8 - 0xFF */
0, 0, 0, 0,
ImplicitOps, 0, ImplicitOps, ImplicitOps,
0, 0, ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM
};
@ -1476,6 +1476,23 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
case 0xf4: /* hlt */
ctxt->vcpu->halt_request = 1;
goto done;
case 0xf5: /* cmc */
/* complement carry flag from eflags reg */
ctxt->eflags ^= EFLG_CF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xf8: /* clc */
ctxt->eflags &= ~EFLG_CF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xfa: /* cli */
ctxt->eflags &= ~X86_EFLAGS_IF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xfb: /* sti */
ctxt->eflags |= X86_EFLAGS_IF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
}
if (c->rep_prefix) {
if (c->regs[VCPU_REGS_RCX] == 0) {