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arm/arm64: KVM: vgic: Parametrize VGIC_NR_SHARED_IRQS

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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>
tirimbino
Marc Zyngier 11 years ago committed by Christoffer Dall
parent c1bfb577ad
commit fb65ab63b8
2 changed files with 11 additions and 6 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 1
      include/kvm/arm_vgic.h
  2. 16
      virt/kvm/arm/vgic.c

1
include/kvm/arm_vgic.h
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@ -29,7 +29,6 @@
#define VGIC_NR_SGIS 16
#define VGIC_NR_PPIS 16
#define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS)
#define VGIC_NR_SHARED_IRQS (VGIC_NR_IRQS - VGIC_NR_PRIVATE_IRQS)
#define VGIC_MAX_CPUS KVM_MAX_VCPUS
#define VGIC_V2_MAX_LRS (1 << 6)

16
virt/kvm/arm/vgic.c
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@ -1086,11 +1086,17 @@ static void vgic_dispatch_sgi(struct kvm_vcpu *vcpu, u32 reg)
}
}
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 @@ static int compute_pending_for_cpu(struct kvm_vcpu *vcpu)
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 @@ static void __kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu)
}
/* 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;
}

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