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| author | Michael Mueller <mimu@linux.vnet.ibm.com> | 2017-07-03 16:32:50 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-11-09 11:49:48 +0300 |
| commit | ee739f4b216e9394281cf99e6d93c67bdf4a37d2 (patch) | |
| tree | 0b209402a4ce76ef63762766b6441068de26c704 /arch/s390/kvm | |
| parent | f7a6509fe002e3909cb41c09e807b7f3ca4a361b (diff) | |
| download | linux-ee739f4b216e9394281cf99e6d93c67bdf4a37d2.tar.xz | |
KVM: s390: abstract conversion between isc and enum irq_types
The abstraction of the conversion between an isc value and an irq_type
by means of functions isc_to_irq_type() and irq_type_to_isc() allows
to clarify the respective operations where used.
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>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm')
| -rw-r--r-- | arch/s390/kvm/interrupt.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 23d8fb25c5dd..a3da4f3065aa 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -213,6 +213,16 @@ static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) vcpu->arch.local_int.pending_irqs; } +static inline int isc_to_irq_type(unsigned long isc) +{ + return IRQ_PEND_IO_ISC_0 + isc; +} + +static inline int irq_type_to_isc(unsigned long irq_type) +{ + return irq_type - IRQ_PEND_IO_ISC_0; +} + static unsigned long disable_iscs(struct kvm_vcpu *vcpu, unsigned long active_mask) { @@ -220,7 +230,7 @@ static unsigned long disable_iscs(struct kvm_vcpu *vcpu, for (i = 0; i <= MAX_ISC; i++) if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) - active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i)); + active_mask &= ~(1UL << (isc_to_irq_type(i))); return active_mask; } @@ -901,7 +911,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu, fi = &vcpu->kvm->arch.float_int; spin_lock(&fi->lock); - isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0]; + isc_list = &fi->lists[irq_type_to_isc(irq_type)]; inti = list_first_entry_or_null(isc_list, struct kvm_s390_interrupt_info, list); @@ -1401,7 +1411,7 @@ static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, list_del_init(&iter->list); fi->counters[FIRQ_CNTR_IO] -= 1; if (list_empty(isc_list)) - clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); + clear_bit(isc_to_irq_type(isc), &fi->pending_irqs); spin_unlock(&fi->lock); return iter; } @@ -1528,7 +1538,7 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) isc = int_word_to_isc(inti->io.io_int_word); list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; list_add_tail(&inti->list, list); - set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs); + set_bit(isc_to_irq_type(isc), &fi->pending_irqs); spin_unlock(&fi->lock); return 0; } |