KVM: s390: ucontrol: disable in-kernel irq stack
This patch disables the in-kernel interrupt stack for KVM virtual
machines that are controlled by user. Userspace has to take care
of handling interrupts on its own.
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 0251094..5b5c28e 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -505,7 +505,8 @@
if (test_thread_flag(TIF_MCCK_PENDING))
s390_handle_mcck();
- kvm_s390_deliver_pending_interrupts(vcpu);
+ if (!kvm_is_ucontrol(vcpu->kvm))
+ kvm_s390_deliver_pending_interrupts(vcpu);
vcpu->arch.sie_block->icptcode = 0;
local_irq_disable();