From: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
This is needed in order to be able to support guest code that uses movd to
write into pages that are marked for write tracking.
Signed-off-by: Mihai Donțu <mdontu@xxxxxxxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 7c79504e58cd..b42a71653622 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1203,6 +1203,11 @@ static u8 simd_prefix_to_bytes(const struct x86_emulate_ctxt *ctxt,
if (simd_prefix == 0x66)
bytes = 8;
break;
+ case 0x7e:
+ /* movd xmm, m32 */
+ if (simd_prefix == 0x66)
+ bytes = 4;
+ break;
default:
break;
}
@@ -4564,6 +4569,10 @@ static const struct gprefix pfx_0f_d6 = {
N, I(0, em_mov), N, N,
};
+static const struct gprefix pfx_0f_7e = {
+ N, I(0, em_mov), N, N,
+};
+
static const struct gprefix pfx_0f_2b = {
ID(0, &instr_dual_0f_2b), ID(0, &instr_dual_0f_2b), N, N,
};
@@ -4823,7 +4832,8 @@ static const struct opcode twobyte_table[256] = {
N, N, N, N,
N, N, N, N,
N, N, N, N,
- N, N, N, GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_6f_0f_7f),
+ N, N, GP(ModRM | SrcReg | DstMem | GPRModRM | Mov | Sse, &pfx_0f_7e),
+ GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_6f_0f_7f),
/* 0x80 - 0x8F */
X16(D(SrcImm | NearBranch)),
/* 0x90 - 0x9F */
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