From: Nitin A Kamble <[email protected]>
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 <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
---
drivers/kvm/x86_emulate.c | 21 +++++++++++++++++++--
1 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 72621c9..af98ea1 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -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 @@ special_insn:
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) {
--
1.5.3.7
--
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