[RFC,v6,87/92] kvm: x86: emulate xorps xmm/m128, xmm
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Message ID 20190809160047.8319-88-alazar@bitdefender.com
State New
Headers show
Series
  • VM introspection
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Commit Message

Adalbert Lazăr Aug. 9, 2019, 4 p.m. UTC
From: Mihai Donțu <mdontu@bitdefender.com>

This extends the previous xorpd by creating a dedicated group, something
I should have done since the very beginning.

Signed-off-by: Mihai Donțu <mdontu@bitdefender.com>
Signed-off-by: Adalbert Lazăr <alazar@bitdefender.com>
---
 arch/x86/kvm/emulate.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 28aac552b34b..14895c043edc 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1178,6 +1178,22 @@  static int em_fnstsw(struct x86_emulate_ctxt *ctxt)
 	return X86EMUL_CONTINUE;
 }
 
+static int em_xorps(struct x86_emulate_ctxt *ctxt)
+{
+	const sse128_t *src = &ctxt->src.vec_val;
+	sse128_t *dst = &ctxt->dst.vec_val;
+	sse128_t xmm0;
+
+	asm volatile("movdqu %%xmm0, %0\n"
+		     "movdqu %1, %%xmm0\n"
+		     "xorps %2, %%xmm0\n"
+		     "movdqu %%xmm0, %1\n"
+		     "movdqu %0, %%xmm0"
+		     : "+m"(xmm0), "+m"(*dst) : "m"(*src));
+
+	return X86EMUL_CONTINUE;
+}
+
 static int em_xorpd(struct x86_emulate_ctxt *ctxt)
 {
 	const sse128_t *src = &ctxt->src.vec_val;
@@ -4615,6 +4631,10 @@  static const struct gprefix pfx_0f_e7 = {
 	N, I(Sse, em_mov), N, N,
 };
 
+static const struct gprefix pfx_0f_57 = {
+	I(Unaligned, em_xorps), I(Unaligned, em_xorpd), N, N
+};
+
 static const struct escape escape_d9 = { {
 	N, N, N, N, N, N, N, I(DstMem16 | Mov, em_fnstcw),
 }, {
@@ -4847,7 +4867,7 @@  static const struct opcode twobyte_table[256] = {
 	/* 0x40 - 0x4F */
 	X16(D(DstReg | SrcMem | ModRM)),
 	/* 0x50 - 0x5F */
-	N, N, N, N, N, N, N, I(SrcMem | DstReg | ModRM | Unaligned | Sse, em_xorpd),
+	N, N, N, N, N, N, N, GP(SrcMem | DstReg | ModRM | Sse, &pfx_0f_57),
 	N, N, N, N, N, N, N, N,
 	/* 0x60 - 0x6F */
 	N, N, N, N,