From 24160af6cb289ace9bde980b33d11713c8fc8192 Mon Sep 17 00:00:00 2001 From: Michael Mueller Date: Wed, 14 Jun 2017 13:21:32 +0200 Subject: 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 Reviewed-by: Halil Pasic Reviewed-by: Pierre Morel Reviewed-by: Christian Borntraeger Reviewed-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- arch/s390/kvm/interrupt.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'arch/s390/kvm') 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; -- cgit v1.2.1