Add XADD instruction emulation (opcode 0x0f 0xc0~0xc1) Signed-off-by: Wei Yongjun <yjwei@xxxxxxxxxxxxxx> --- arch/x86/kvm/emulate.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 8bf80a9..7c47e37 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2387,7 +2387,8 @@ static struct opcode twobyte_table[256] = { D(DstReg | SrcMem | ModRM), D(DstReg | SrcMem | ModRM), D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov), /* 0xC0 - 0xCF */ - N, N, N, D(DstMem | SrcReg | ModRM | Mov), + D(ByteOp | DstMem | SrcReg | ModRM), D(DstMem | SrcReg | ModRM), + N, D(DstMem | SrcReg | ModRM | Mov), N, N, N, GD(0, &group9), N, N, N, N, N, N, N, N, /* 0xD0 - 0xDF */ @@ -3532,6 +3533,12 @@ twobyte_insn: c->dst.val = (c->d & ByteOp) ? (s8) c->src.val : (s16) c->src.val; break; + case 0xc0 ... 0xc1: /* xadd */ + /* Write back the register source. */ + write_register_operand(&c->src, c->dst.val, c->dst.bytes); + /* Write back the memory destination with implicit LOCK prefix. */ + c->lock_prefix = 1; + goto add; case 0xc3: /* movnti */ c->dst.bytes = c->op_bytes; c->dst.val = (c->op_bytes == 4) ? (u32) c->src.val : -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html