KVM: x86 emulator: push imm8

Implement the instruction

    	push imm8
    	opcode: 0x6a

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

1 files changed, 14 insertions, 3 deletions

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 86171ca794dd..4fc2da6aae7d 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -104,10 +104,11 @@ static u8 opcode_table[256] = {
         /* 0x58 - 0x5F */
         ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
         ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
-        /* 0x60 - 0x6B */
+        /* 0x60 - 0x67 */
         0, 0, 0, DstReg | SrcMem32 | ModRM | Mov /* movsxd (x86/64) */ ,
-        0, 0, 0, 0, 0, 0, 0, 0,
-        /* 0x6C - 0x6F */
+        0, 0, 0, 0,
+        /* 0x68 - 0x6F */
+        0, 0, ImplicitOps|Mov, 0,
         SrcNone  | ByteOp  | ImplicitOps, SrcNone  | ImplicitOps, /* insb, insw/insd */
         SrcNone  | ByteOp  | ImplicitOps, SrcNone  | ImplicitOps, /* outsb, outsw/outsd */
         /* 0x70 - 0x7F */
@@ -919,6 +920,16 @@ done_prefixes:
                         goto cannot_emulate;
                 dst.val = (s32) src.val;
                 break;
+        case 0x6a: /* push imm8 */
+                src.val = 0L;
+                src.val = insn_fetch(s8, 1, _eip);
+push:
+                dst.type  = OP_MEM;
+                dst.bytes = op_bytes;
+                dst.val = src.val;
+                register_address_increment(_regs[VCPU_REGS_RSP], -op_bytes);
+                dst.ptr = register_address(ctxt->ss_base, _regs[VCPU_REGS_RSP]);
+                break;
         case 0x80 ... 0x83:     /* Grp1 */
                 switch (modrm_reg) {
                 case 0: