public-mirrors/linux
1
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-18 22:14:16 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

Browse source 
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: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2016-02-09 17:09:49 +00:00
parent b4344545cf
commit 84e8b9c88d
1 changed files with 9 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
arch/arm64/kvm/hyp/vgic-v3-sr.c
View file

@ -187,7 +187,14 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
save_maint_int_state(vcpu, max_lr_idx + 1); save_maint_int_state(vcpu, max_lr_idx + 1);
for (i = 0; i <= max_lr_idx; i++) { 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); cpu_if->vgic_lr[i] = __gic_v3_get_lr(i);
} }