KVM: s390: handle stop irqs without action_bits

This patch removes the famous action_bits and moves the handling of
SIGP STOP AND STORE STATUS directly into the SIGP STOP interrupt.

The new local interrupt infrastructure is used to track pending stop
requests.

STOP irqs are the only irqs that don't get actively delivered. They
remain pending until the stop function is executed (=stop intercept).

If another STOP irq is already pending, -EBUSY will now be returned
(needed for the SIGP handling code).

Migration of pending SIGP STOP (AND STORE STATUS) orders should now
be supported out of the box.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 5eafe84a7b3d..02e42480609d 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -383,10 +383,6 @@ struct kvm_s390_interrupt_info {
         };
 };
 
-/* for local_interrupt.action_flags */
-#define ACTION_STORE_ON_STOP            (1<<0)
-#define ACTION_STOP_ON_STOP             (1<<1)
-
 struct kvm_s390_irq_payload {
         struct kvm_s390_io_info io;
         struct kvm_s390_ext_info ext;
@@ -403,7 +399,6 @@ struct kvm_s390_local_interrupt {
         struct kvm_s390_float_interrupt *float_int;
         wait_queue_head_t *wq;
         atomic_t *cpuflags;
-        unsigned int action_bits;
         DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
         struct kvm_s390_irq_payload irq;
         unsigned long pending_irqs;