KVM: X86 emulator: jump conditional short

Implement emulation of more jump conditional instructions
    jcc shortrel
    opcodes: 0x70 - 0x7f

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index ba53e59f558a..57f1a5ad0110 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -111,8 +111,12 @@ static u8 opcode_table[256] = {
         0, 0, ImplicitOps|Mov, 0,
         SrcNone  | ByteOp  | ImplicitOps, SrcNone  | ImplicitOps, /* insb, insw/insd */
         SrcNone  | ByteOp  | ImplicitOps, SrcNone  | ImplicitOps, /* outsb, outsw/outsd */
-        /* 0x70 - 0x7F */
-        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        /* 0x70 - 0x77 */
+        ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+        ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+        /* 0x78 - 0x7F */
+        ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+        ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
         /* 0x80 - 0x87 */
         ByteOp | DstMem | SrcImm | ModRM, DstMem | SrcImm | ModRM,
         ByteOp | DstMem | SrcImm | ModRM, DstMem | SrcImmByte | ModRM,
@@ -1268,6 +1272,13 @@ special_insn:
                                 ) == 0)
                         return -1;
                 return 0;
+        case 0x70 ... 0x7f: /* jcc (short) */ {
+                int rel = insn_fetch(s8, 1, _eip);
+
+                if (test_cc(b, _eflags))
+                JMP_REL(rel);
+                break;
+        }
         case 0x9c: /* pushf */
                 src.val =  (unsigned long) _eflags;
                 goto push;