KVM: x86 emulator: use aligned variants of SSE register ops

As the the compiler ensures that the memory operand is always aligned
to a 16 byte memory location, use the aligned variant of MOVDQ for
read_sse_reg() and write_sse_reg().

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1451cffd97eb87cdde07379d2d5dda0f37dc7509..5a0fee1a19c9fb3005663b5ddc3d4866b11a9489 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -909,23 +909,23 @@ static void read_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data, int reg)
 {
        ctxt->ops->get_fpu(ctxt);
        switch (reg) {
-       case 0: asm("movdqu %%xmm0, %0" : "=m"(*data)); break;
-       case 1: asm("movdqu %%xmm1, %0" : "=m"(*data)); break;
-       case 2: asm("movdqu %%xmm2, %0" : "=m"(*data)); break;
-       case 3: asm("movdqu %%xmm3, %0" : "=m"(*data)); break;
-       case 4: asm("movdqu %%xmm4, %0" : "=m"(*data)); break;
-       case 5: asm("movdqu %%xmm5, %0" : "=m"(*data)); break;
-       case 6: asm("movdqu %%xmm6, %0" : "=m"(*data)); break;
-       case 7: asm("movdqu %%xmm7, %0" : "=m"(*data)); break;
+       case 0: asm("movdqa %%xmm0, %0" : "=m"(*data)); break;
+       case 1: asm("movdqa %%xmm1, %0" : "=m"(*data)); break;
+       case 2: asm("movdqa %%xmm2, %0" : "=m"(*data)); break;
+       case 3: asm("movdqa %%xmm3, %0" : "=m"(*data)); break;
+       case 4: asm("movdqa %%xmm4, %0" : "=m"(*data)); break;
+       case 5: asm("movdqa %%xmm5, %0" : "=m"(*data)); break;
+       case 6: asm("movdqa %%xmm6, %0" : "=m"(*data)); break;
+       case 7: asm("movdqa %%xmm7, %0" : "=m"(*data)); break;
 #ifdef CONFIG_X86_64
-       case 8: asm("movdqu %%xmm8, %0" : "=m"(*data)); break;
-       case 9: asm("movdqu %%xmm9, %0" : "=m"(*data)); break;
-       case 10: asm("movdqu %%xmm10, %0" : "=m"(*data)); break;
-       case 11: asm("movdqu %%xmm11, %0" : "=m"(*data)); break;
-       case 12: asm("movdqu %%xmm12, %0" : "=m"(*data)); break;
-       case 13: asm("movdqu %%xmm13, %0" : "=m"(*data)); break;
-       case 14: asm("movdqu %%xmm14, %0" : "=m"(*data)); break;
-       case 15: asm("movdqu %%xmm15, %0" : "=m"(*data)); break;
+       case 8: asm("movdqa %%xmm8, %0" : "=m"(*data)); break;
+       case 9: asm("movdqa %%xmm9, %0" : "=m"(*data)); break;
+       case 10: asm("movdqa %%xmm10, %0" : "=m"(*data)); break;
+       case 11: asm("movdqa %%xmm11, %0" : "=m"(*data)); break;
+       case 12: asm("movdqa %%xmm12, %0" : "=m"(*data)); break;
+       case 13: asm("movdqa %%xmm13, %0" : "=m"(*data)); break;
+       case 14: asm("movdqa %%xmm14, %0" : "=m"(*data)); break;
+       case 15: asm("movdqa %%xmm15, %0" : "=m"(*data)); break;
 #endif
        default: BUG();
        }
@@ -937,23 +937,23 @@ static void write_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data,
 {
        ctxt->ops->get_fpu(ctxt);
        switch (reg) {
-       case 0: asm("movdqu %0, %%xmm0" : : "m"(*data)); break;
-       case 1: asm("movdqu %0, %%xmm1" : : "m"(*data)); break;
-       case 2: asm("movdqu %0, %%xmm2" : : "m"(*data)); break;
-       case 3: asm("movdqu %0, %%xmm3" : : "m"(*data)); break;
-       case 4: asm("movdqu %0, %%xmm4" : : "m"(*data)); break;
-       case 5: asm("movdqu %0, %%xmm5" : : "m"(*data)); break;
-       case 6: asm("movdqu %0, %%xmm6" : : "m"(*data)); break;
-       case 7: asm("movdqu %0, %%xmm7" : : "m"(*data)); break;
+       case 0: asm("movdqa %0, %%xmm0" : : "m"(*data)); break;
+       case 1: asm("movdqa %0, %%xmm1" : : "m"(*data)); break;
+       case 2: asm("movdqa %0, %%xmm2" : : "m"(*data)); break;
+       case 3: asm("movdqa %0, %%xmm3" : : "m"(*data)); break;
+       case 4: asm("movdqa %0, %%xmm4" : : "m"(*data)); break;
+       case 5: asm("movdqa %0, %%xmm5" : : "m"(*data)); break;
+       case 6: asm("movdqa %0, %%xmm6" : : "m"(*data)); break;
+       case 7: asm("movdqa %0, %%xmm7" : : "m"(*data)); break;
 #ifdef CONFIG_X86_64
-       case 8: asm("movdqu %0, %%xmm8" : : "m"(*data)); break;
-       case 9: asm("movdqu %0, %%xmm9" : : "m"(*data)); break;
-       case 10: asm("movdqu %0, %%xmm10" : : "m"(*data)); break;
-       case 11: asm("movdqu %0, %%xmm11" : : "m"(*data)); break;
-       case 12: asm("movdqu %0, %%xmm12" : : "m"(*data)); break;
-       case 13: asm("movdqu %0, %%xmm13" : : "m"(*data)); break;
-       case 14: asm("movdqu %0, %%xmm14" : : "m"(*data)); break;
-       case 15: asm("movdqu %0, %%xmm15" : : "m"(*data)); break;
+       case 8: asm("movdqa %0, %%xmm8" : : "m"(*data)); break;
+       case 9: asm("movdqa %0, %%xmm9" : : "m"(*data)); break;
+       case 10: asm("movdqa %0, %%xmm10" : : "m"(*data)); break;
+       case 11: asm("movdqa %0, %%xmm11" : : "m"(*data)); break;
+       case 12: asm("movdqa %0, %%xmm12" : : "m"(*data)); break;
+       case 13: asm("movdqa %0, %%xmm13" : : "m"(*data)); break;
+       case 14: asm("movdqa %0, %%xmm14" : : "m"(*data)); break;
+       case 15: asm("movdqa %0, %%xmm15" : : "m"(*data)); break;
 #endif
        default: BUG();
        }