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    Subject[PATCH 056/104] KVM: x86 emulator: implement 'and $imm, %{al|ax|eax}'
    Date
    From: Nitin A Kamble <nitin.a.kamble@intel.com>

    Implement emulation of instruction
    and al imm8 (opcode 0x24)
    and ax/eax imm16/imm32 (opcode 0x25)

    Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
    Signed-off-by: Avi Kivity <avi@qumranet.com>
    ---
    drivers/kvm/x86_emulate.c | 21 +++++++++++++++++++--
    1 files changed, 19 insertions(+), 2 deletions(-)

    diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
    index b4f439c..2b94d16 100644
    --- a/drivers/kvm/x86_emulate.c
    +++ b/drivers/kvm/x86_emulate.c
    @@ -83,7 +83,7 @@ static u8 opcode_table[256] = {
    /* 0x20 - 0x27 */
    ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
    ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
    - 0, 0, 0, 0,
    + SrcImmByte, SrcImm, 0, 0,
    /* 0x28 - 0x2F */
    ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
    ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
    @@ -882,10 +882,27 @@ done_prefixes:
    sbb: /* sbb */
    emulate_2op_SrcV("sbb", src, dst, _eflags);
    break;
    - case 0x20 ... 0x25:
    + case 0x20 ... 0x23:
    and: /* and */
    emulate_2op_SrcV("and", src, dst, _eflags);
    break;
    + case 0x24: /* and al imm8 */
    + dst.type = OP_REG;
    + dst.ptr = &_regs[VCPU_REGS_RAX];
    + dst.val = *(u8 *)dst.ptr;
    + dst.bytes = 1;
    + dst.orig_val = dst.val;
    + goto and;
    + case 0x25: /* and ax imm16, or eax imm32 */
    + dst.type = OP_REG;
    + dst.bytes = op_bytes;
    + dst.ptr = &_regs[VCPU_REGS_RAX];
    + if (op_bytes == 2)
    + dst.val = *(u16 *)dst.ptr;
    + else
    + dst.val = *(u32 *)dst.ptr;
    + dst.orig_val = dst.val;
    + goto and;
    case 0x28 ... 0x2d:
    sub: /* sub */
    emulate_2op_SrcV("sub", src, dst, _eflags);
    --
    1.5.3
    -
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