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@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
arch/arm64/kvm/hyp/vgic-v3-sr.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c
index 61a5e46..0db426e 100644
--- a/arch/arm64/kvm/hyp/vgic-v3-sr.c
+++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c
@@ -187,8 +187,15 @@ 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))
- cpu_if->vgic_lr[i] = __gic_v3_get_lr(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);
}
switch (nr_pri_bits) {
--
2.1.4
--
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