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ARM: KVM: vgic: simplify vgic_get_target_reg

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vgic_get_target_reg is quite complicated, for no good reason.
Actually, it is fairly easy to write it in a much more efficient
way by using the target CPU array instead of the bitmap.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Marc Zyngier 2013-08-29 11:08:22 +01:00 committed by Gleb Natapov
parent a9f6cf965e
commit 986af8e078
1 changed files with 3 additions and 9 deletions
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12
virt/kvm/arm/vgic.c
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@ -432,19 +432,13 @@ static bool handle_mmio_priority_reg(struct kvm_vcpu *vcpu,
static u32 vgic_get_target_reg(struct kvm *kvm, int irq)
{
struct vgic_dist *dist = &kvm->arch.vgic;
struct kvm_vcpu *vcpu;
int i, c;
unsigned long *bmap;
int i;
u32 val = 0;
irq -= VGIC_NR_PRIVATE_IRQS;
kvm_for_each_vcpu(c, vcpu, kvm) {
bmap = vgic_bitmap_get_shared_map(&dist->irq_spi_target[c]);
for (i = 0; i < GICD_IRQS_PER_ITARGETSR; i++)
if (test_bit(irq + i, bmap))
val |= 1 << (c + i * 8);
}
for (i = 0; i < GICD_IRQS_PER_ITARGETSR; i++)
val |= 1 << (dist->irq_spi_cpu[irq + i] + i * 8);
return val;
}