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Commit 84e8b9c8 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

arm64: KVM: vgic-v3: Do not save an LR known to be empty 



On exit, any empty LR will be signaled in ICH_ELRSR_EL2. Which
means that we do not have to save it, and we can just clear
its state in the in-memory copy.

Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent b4344545

arch/arm64/kvm/hyp/vgic-v3-sr.c

+9 −2
Original line number Diff line number Diff line
@@ -187,7 +187,14 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu) 
		save_maint_int_state(vcpu, max_lr_idx + 1);



		for (i = 0; i <= max_lr_idx; i++) {

			if (vcpu->arch.vgic_cpu.live_lrs & (1UL << i))

			if (!(vcpu->arch.vgic_cpu.live_lrs & (1UL << i)))

				continue;



			if (cpu_if->vgic_elrsr & (1 << i)) {

				cpu_if->vgic_lr[i] &= ~ICH_LR_STATE;

				continue;

			}



			cpu_if->vgic_lr[i] = __gic_v3_get_lr(i);

		}