[PATCH 2/2] KVM: x86 emulator: implement MMX MOVQ (opcodes 0f 6f, 0f 7f)

[Avi Kivity <avi@redhat.com>]

Needed by some framebuffer drivers.  See

https://bugzilla.kernel.org/show_bug.cgi?id=42779

Signed-off-by: Avi Kivity <avi@redhat.com>
---
 arch/x86/kvm/emulate.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index f87d74e..282baa1 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2927,6 +2927,12 @@ static int em_movdqu(struct x86_emulate_ctxt *ctxt)
 	return X86EMUL_CONTINUE;
 }
 
+static int em_movq(struct x86_emulate_ctxt *ctxt)
+{
+	ctxt->dst.mm_val = ctxt->src.mm_val;
+	return X86EMUL_CONTINUE;
+}
+
 static int em_invlpg(struct x86_emulate_ctxt *ctxt)
 {
 	int rc;
@@ -3466,7 +3472,7 @@ static int check_perm_out(struct x86_emulate_ctxt *ctxt)
 };
 
 static struct gprefix pfx_0f_6f_0f_7f = {
-	N, N, N, I(Sse, em_movdqu),
+	I(Mmx, em_movq), N, N, I(Sse, em_movdqu),
 };
 
 static struct opcode opcode_table[256] = {
-- 
1.7.9