KVM: x86 emulator: add JrCXZ instruction emulation
Add JrCXZ instruction emulation (opcode 0xe3)
Used by FreeBSD boot loader.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index aece501..312e798 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2487,7 +2487,7 @@
/* 0xD8 - 0xDF */
N, N, N, N, N, N, N, N,
/* 0xE0 - 0xE7 */
- X3(D(SrcImmByte)), N,
+ X4(D(SrcImmByte)),
D(ByteOp | SrcImmUByte | DstAcc), D(SrcImmUByte | DstAcc),
D(ByteOp | SrcAcc | DstImmUByte), D(SrcAcc | DstImmUByte),
/* 0xE8 - 0xEF */
@@ -3285,6 +3285,10 @@
(c->b == 0xe2 || test_cc(c->b ^ 0x5, ctxt->eflags)))
jmp_rel(c, c->src.val);
break;
+ case 0xe3: /* jcxz/jecxz/jrcxz */
+ if (address_mask(c, c->regs[VCPU_REGS_RCX]) == 0)
+ jmp_rel(c, c->src.val);
+ break;
case 0xe4: /* inb */
case 0xe5: /* in */
goto do_io_in;