KVM: x86 emulator: fix INTn emulation not pushing EFLAGS and CS
emulate_push() only schedules a push; it doesn't actually push anything.
Call writeback() to flush out the write.
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index cffe7c2..b89a20e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1232,7 +1232,7 @@
struct x86_emulate_ops *ops, int irq)
{
struct decode_cache *c = &ctxt->decode;
- int rc = X86EMUL_CONTINUE;
+ int rc;
struct desc_ptr dt;
gva_t cs_addr;
gva_t eip_addr;
@@ -1242,14 +1242,25 @@
/* TODO: Add limit checks */
c->src.val = ctxt->eflags;
emulate_push(ctxt, ops);
+ rc = writeback(ctxt, ops);
+ if (rc != X86EMUL_CONTINUE)
+ return rc;
ctxt->eflags &= ~(EFLG_IF | EFLG_TF | EFLG_AC);
c->src.val = ops->get_segment_selector(VCPU_SREG_CS, ctxt->vcpu);
emulate_push(ctxt, ops);
+ rc = writeback(ctxt, ops);
+ if (rc != X86EMUL_CONTINUE)
+ return rc;
c->src.val = c->eip;
emulate_push(ctxt, ops);
+ rc = writeback(ctxt, ops);
+ if (rc != X86EMUL_CONTINUE)
+ return rc;
+
+ c->dst.type = OP_NONE;
ops->get_idt(&dt, ctxt->vcpu);