KVM: x86 emulator: implement IMUL REG, R/M, imm8 (opcode 6B)

Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 9e58f5054c396d4ac3e56c985e8d7b6eb330769a..618386f80518d46f3cc8c58915aa6fe0374e0eea 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2264,6 +2264,15 @@ static int em_ret_near_imm(struct x86_emulate_ctxt *ctxt)
        return X86EMUL_CONTINUE;
 }
 
+static int em_imul_3op(struct x86_emulate_ctxt *ctxt)
+{
+       struct decode_cache *c = &ctxt->decode;
+
+       c->dst.val = c->src2.val;
+       emulate_2op_SrcV_nobyte("imul", c->src, c->dst, ctxt->eflags);
+       return X86EMUL_CONTINUE;
+}
+
 #define D(_y) { .flags = (_y) }
 #define N    D(0)
 #define G(_f, _g) { .flags = ((_f) | Group), .u.group = (_g) }
@@ -2371,7 +2380,8 @@ static struct opcode opcode_table[256] = {
        N, N, N, N,
        /* 0x68 - 0x6F */
        I(SrcImm | Mov | Stack, em_push), N,
-       I(SrcImmByte | Mov | Stack, em_push), N,
+       I(SrcImmByte | Mov | Stack, em_push),
+       I(DstReg | SrcMem | ModRM | Src2ImmByte, em_imul_3op),
        D(DstDI | ByteOp | Mov | String), D(DstDI | Mov | String), /* insb, insw/insd */
        D(SrcSI | ByteOp | ImplicitOps | String), D(SrcSI | ImplicitOps | String), /* outsb, outsw/outsd */
        /* 0x70 - 0x7F */