KVM: x86: Add support for emulating MOVNTDQA

MOVNTDQA is a simple MOV instruction, in fact it has the same
characteristics as 0F E7 (MOVNTDQ) other than the aligned-address
requirement.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://patch.msgid.link/20251114003633.60689-2-pbonzini@redhat.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 4e3da5b497b85c32ab9de1cff9b941252ad8699e..43ae4fcb21375f989a480db9c5fc95039afb80d4 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4133,7 +4133,7 @@ static const struct gprefix pfx_0f_28_0f_29 = {
        I(Aligned, em_mov), I(Aligned, em_mov), N, N,
 };
 
-static const struct gprefix pfx_0f_e7 = {
+static const struct gprefix pfx_0f_e7_0f_38_2a = {
        N, I(Sse, em_mov), N, N,
 };
 
@@ -4431,7 +4431,7 @@ static const struct opcode twobyte_table[256] = {
        /* 0xD0 - 0xDF */
        N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N,
        /* 0xE0 - 0xEF */
-       N, N, N, N, N, N, N, GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_e7),
+       N, N, N, N, N, N, N, GP(SrcReg | DstMem | ModRM | Mov, &pfx_0f_e7_0f_38_2a),
        N, N, N, N, N, N, N, N,
        /* 0xF0 - 0xFF */
        N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N
@@ -4458,8 +4458,13 @@ static const struct gprefix three_byte_0f_38_f1 = {
  * byte.
  */
 static const struct opcode opcode_map_0f_38[256] = {
-       /* 0x00 - 0x7f */
-       X16(N), X16(N), X16(N), X16(N), X16(N), X16(N), X16(N), X16(N),
+       /* 0x00 - 0x1f */
+       X16(N), X16(N),
+       /* 0x20 - 0x2f */
+       X8(N),
+       X2(N), GP(SrcReg | DstMem | ModRM | Mov | Aligned, &pfx_0f_e7_0f_38_2a), N, N, N, N, N,
+       /* 0x30 - 0x7f */
+       X16(N), X16(N), X16(N), X16(N), X16(N),
        /* 0x80 - 0xef */
        X16(N), X16(N), X16(N), X16(N), X16(N), X16(N), X16(N),
        /* 0xf0 - 0xf1 */