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KVM: s390: add GISA interrupts to FLIC ioctl interface

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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 <[email protected]>
Reviewed-by: Halil Pasic <[email protected]>
Reviewed-by: Pierre Morel <[email protected]>
Reviewed-by: Christian Borntraeger <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Signed-off-by: Christian Borntraeger <[email protected]>
This commit is contained in:
Michael Mueller 2017-06-14 13:21:32 +02:00 • committed by Christian Borntraeger
commit 24160af6cb
1 changed files with 18 additions and 0 deletions
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18
arch/s390/kvm/interrupt.c
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@ -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;