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Commit 986af8e0 authored by Marc Zyngier's avatar Marc Zyngier Committed by Gleb Natapov
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ARM: KVM: vgic: simplify vgic_get_target_reg 



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: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
parent a9f6cf96

virt/kvm/arm/vgic.c

+3 −9
Original line number Diff line number Diff line
@@ -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);

	}

		val |= 1 << (dist->irq_spi_cpu[irq + i] + i * 8);



	return val;

}