KVM: Emulate hlt on real mode for Intel

This has two use cases: the bios can't boot from disk, and guest smp
bootstrap.

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 90abd3c58c65..a1f51b9d482d 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1608,8 +1608,13 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 
         if (vcpu->rmode.active &&
             handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
-                                                                error_code))
+                                                                error_code)) {
+                if (vcpu->halt_request) {
+                        vcpu->halt_request = 0;
+                        return kvm_emulate_halt(vcpu);
+                }
                 return 1;
+        }
 
         if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) == (INTR_TYPE_EXCEPTION | 1)) {
                 kvm_run->exit_reason = KVM_EXIT_DEBUG;