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authorPaolo Bonzini <pbonzini@redhat.com>2013-05-30 16:35:55 +0200
committerGleb Natapov <gleb@redhat.com>2013-06-03 11:27:12 +0300
commit8acb42070ec4c87a9baab5c7bac626030d5bef28 (patch)
tree5515211b023326ba26a1c2f25656d7269a6cf672 /arch
parent103f98ea64a1b0a67d8a1b23070b4db3533db2b8 (diff)
downloadvexpress-lsk-8acb42070ec4c87a9baab5c7bac626030d5bef28.tar.gz
KVM: fix sil/dil/bpl/spl in the mod/rm fields
The x86-64 extended low-byte registers were fetched correctly from reg, but not from mod/rm. This fixes another bug in the boot of RHEL5.9 64-bit, but it is still not enough. Cc: <stable@vger.kernel.org> # 3.9 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/emulate.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 0f42c2a4816..5953dcea752 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1240,9 +1240,12 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
ctxt->modrm_seg = VCPU_SREG_DS;
if (ctxt->modrm_mod == 3) {
+ int highbyte_regs = ctxt->rex_prefix == 0;
+
op->type = OP_REG;
op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
- op->addr.reg = decode_register(ctxt, ctxt->modrm_rm, ctxt->d & ByteOp);
+ op->addr.reg = decode_register(ctxt, ctxt->modrm_rm,
+ highbyte_regs && (ctxt->d & ByteOp));
if (ctxt->d & Sse) {
op->type = OP_XMM;
op->bytes = 16;