arm/arm64: KVM: vgic: Parametrize VGIC_NR_SHARED_IRQS
Having a dynamic number of supported interrupts means that we
cannot relly on VGIC_NR_SHARED_IRQS being fixed anymore.
Instead, make it take the distributor structure as a parameter,
so it can return the right value.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 08db876..7d64dc2 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1086,11 +1086,17 @@
}
}
+static int vgic_nr_shared_irqs(struct vgic_dist *dist)
+{
+ return dist->nr_irqs - VGIC_NR_PRIVATE_IRQS;
+}
+
static int compute_pending_for_cpu(struct kvm_vcpu *vcpu)
{
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
unsigned long *pending, *enabled, *pend_percpu, *pend_shared;
unsigned long pending_private, pending_shared;
+ int nr_shared = vgic_nr_shared_irqs(dist);
int vcpu_id;
vcpu_id = vcpu->vcpu_id;
@@ -1103,15 +1109,15 @@
pending = vgic_bitmap_get_shared_map(&dist->irq_pending);
enabled = vgic_bitmap_get_shared_map(&dist->irq_enabled);
- bitmap_and(pend_shared, pending, enabled, VGIC_NR_SHARED_IRQS);
+ bitmap_and(pend_shared, pending, enabled, nr_shared);
bitmap_and(pend_shared, pend_shared,
vgic_bitmap_get_shared_map(&dist->irq_spi_target[vcpu_id]),
- VGIC_NR_SHARED_IRQS);
+ nr_shared);
pending_private = find_first_bit(pend_percpu, VGIC_NR_PRIVATE_IRQS);
- pending_shared = find_first_bit(pend_shared, VGIC_NR_SHARED_IRQS);
+ pending_shared = find_first_bit(pend_shared, nr_shared);
return (pending_private < VGIC_NR_PRIVATE_IRQS ||
- pending_shared < VGIC_NR_SHARED_IRQS);
+ pending_shared < vgic_nr_shared_irqs(dist));
}
/*
@@ -1368,7 +1374,7 @@
}
/* SPIs */
- for_each_set_bit(i, vgic_cpu->pending_shared, VGIC_NR_SHARED_IRQS) {
+ for_each_set_bit(i, vgic_cpu->pending_shared, vgic_nr_shared_irqs(dist)) {
if (!vgic_queue_hwirq(vcpu, i + VGIC_NR_PRIVATE_IRQS))
overflow = 1;
}