KVM: s390: add GISA interrupts to FLIC ioctl interface

Pending interrupts marked in the GISA IPM are required to
become part of the answer of ioctl KVM_DEV_FLIC_GET_ALL_IRQS.

The ioctl KVM_DEV_FLIC_ENQUEUE is already capable to enqueue
adapter interrupts when a GISA is present.

With ioctl KVM_DEV_FLIC_CLEAR_IRQS the GISA IPM wil be cleared
now as well.

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index a0ded3a23a5e..dd4c50b82a53 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -1879,6 +1879,7 @@ void kvm_s390_clear_float_irqs(struct kvm *kvm)
         for (i = 0; i < FIRQ_MAX_COUNT; i++)
                 fi->counters[i] = 0;
         spin_unlock(&fi->lock);
+        kvm_s390_gisa_clear(kvm);
 };
 
 static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
@@ -1906,6 +1907,22 @@ static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
 
         max_irqs = len / sizeof(struct kvm_s390_irq);
 
+        if (kvm->arch.gisa &&
+            kvm_s390_gisa_get_ipm(kvm->arch.gisa)) {
+                for (i = 0; i <= MAX_ISC; i++) {
+                        if (n == max_irqs) {
+                                /* signal userspace to try again */
+                                ret = -ENOMEM;
+                                goto out_nolock;
+                        }
+                        if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, i)) {
+                                irq = (struct kvm_s390_irq *) &buf[n];
+                                irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
+                                irq->u.io.io_int_word = isc_to_int_word(i);
+                                n++;
+                        }
+                }
+        }
         fi = &kvm->arch.float_int;
         spin_lock(&fi->lock);
         for (i = 0; i < FIRQ_LIST_COUNT; i++) {
@@ -1944,6 +1961,7 @@ static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
 
 out:
         spin_unlock(&fi->lock);
+out_nolock:
         if (!ret && n > 0) {
                 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
                         ret = -EFAULT;