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[PATCHv2,04/23] KVM: x86 emulator: cleanup nop emulation

Message ID 1272471344-7076-5-git-send-email-gleb@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Gleb Natapov April 28, 2010, 4:15 p.m. UTC 
None
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Patch

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index ea5c6fd..fbc555b 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2799,8 +2799,8 @@  special_insn:
 			goto done;
 		break;
 	case 0x90: /* nop / xchg r8,rax */
-		if (!(c->rex_prefix & 1)) { /* nop */
-			c->dst.type = OP_NONE;
+		if (c->dst.ptr == (unsigned long *)&c->regs[VCPU_REGS_RAX]) {
+			c->dst.type = OP_NONE;  /* nop */
 			break;
 		}
 	case 0x91 ... 0x97: /* xchg reg,rax */