From: Michael Mueller <mimu@xxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
arch/s390/kvm/interrupt.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 23d8fb2..a3da4f3 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;
}
--
2.9.4
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