diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-09 20:09:49 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-03-09 07:24:07 +0300 |
| commit | 84e8b9c88d5fe9c9a59ed24ae44d7ac0983df92b (patch) | |
| tree | 84a22a8961fd7f97b4df927712565ce2148dc336 /arch/arm64 | |
| parent | b4344545cf85d2a6ad546ec21dab5f76487e020e (diff) | |
| download | linux-84e8b9c88d5fe9c9a59ed24ae44d7ac0983df92b.tar.xz | |
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: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kvm/hyp/vgic-v3-sr.c | 11 |
1 files 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 61a5e46b4335..0db426e6c13e 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) { |