KVM: VMX: Improve error reporting during invalid guest state emulation
If instruction emulation fails, report it properly to userspace.
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 661df185..591dcea 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -4996,8 +4996,12 @@
goto out;
}
- if (err != EMULATE_DONE)
+ if (err != EMULATE_DONE) {
+ vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
+ vcpu->run->internal.ndata = 0;
return 0;
+ }
if (signal_pending(current))
goto out;
