From: Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx>
An Ubuntu 9.10 Karmic Koala guest is unable to boot or install due to
missing movdqa emulation:
kvm_exit: reason EXCEPTION_NMI rip 0x7fef3e025a7b info 7fef3e799000 80000b0e
kvm_page_fault: address 7fef3e799000 error_code f
kvm_emulate_insn: 0:7fef3e025a7b: 66 0f 7f 07 (prot64)
movdqa %xmm0,(%rdi)
[avi: mark it explicitly aligned]
Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 6302e5c..b160fb1f 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2818,7 +2818,7 @@ static int em_rdpmc(struct x86_emulate_ctxt *ctxt)
static int em_mov(struct x86_emulate_ctxt *ctxt)
{
- ctxt->dst.val = ctxt->src.val;
+ memcpy(ctxt->dst.valptr, ctxt->src.valptr, ctxt->op_bytes);
return X86EMUL_CONTINUE;
}
@@ -2898,12 +2898,6 @@ static int em_mov_sreg_rm(struct x86_emulate_ctxt *ctxt)
return load_segment_descriptor(ctxt, sel, ctxt->modrm_reg);
}
-static int em_movdqu(struct x86_emulate_ctxt *ctxt)
-{
- memcpy(&ctxt->dst.vec_val, &ctxt->src.vec_val, ctxt->op_bytes);
- return X86EMUL_CONTINUE;
-}
-
static int em_invlpg(struct x86_emulate_ctxt *ctxt)
{
int rc;
@@ -3443,7 +3437,7 @@ static int check_perm_out(struct x86_emulate_ctxt *ctxt)
};
static struct gprefix pfx_0f_6f_0f_7f = {
- N, N, N, I(Sse | Unaligned, em_movdqu),
+ N, I(Sse | Aligned, em_mov), N, I(Sse | Unaligned, em_mov),
};
static struct opcode opcode_table[256] = {
--
1.7.10
--
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