diff options
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic-v2.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm64/kvm/vgic/vgic-v2.c b/arch/arm64/kvm/vgic/vgic-v2.c index 9a2de03f74c3..bbd4d003fde8 100644 --- a/arch/arm64/kvm/vgic/vgic-v2.c +++ b/arch/arm64/kvm/vgic/vgic-v2.c @@ -100,6 +100,8 @@ static void vgic_v2_fold_lr(struct kvm_vcpu *vcpu, u32 val) vgic_put_irq(vcpu->kvm, irq); } +static u32 vgic_v2_compute_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq); + /* * transfer the content of the LRs back into the corresponding ap_list: * - active bit is transferred as is @@ -111,12 +113,37 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu) { struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; struct vgic_v2_cpu_if *cpuif = &vgic_cpu->vgic_v2; + u32 eoicount = FIELD_GET(GICH_HCR_EOICOUNT, cpuif->vgic_hcr); + struct vgic_irq *irq; DEBUG_SPINLOCK_BUG_ON(!irqs_disabled()); for (int lr = 0; lr < vgic_cpu->vgic_v2.used_lrs; lr++) vgic_v2_fold_lr(vcpu, cpuif->vgic_lr[lr]); + /* See the GICv3 equivalent for the EOIcount handling rationale */ + list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) { + u32 lr; + + if (!eoicount) { + break; + } else { + guard(raw_spinlock)(&irq->irq_lock); + + if (!(likely(vgic_target_oracle(irq) == vcpu) && + irq->active)) + continue; + + lr = vgic_v2_compute_lr(vcpu, irq) & ~GICH_LR_ACTIVE_BIT; + } + + if (lr & GICH_LR_HW) + writel_relaxed(FIELD_GET(GICH_LR_PHYSID_CPUID, lr), + kvm_vgic_global_state.gicc_base + GIC_CPU_DEACTIVATE); + vgic_v2_fold_lr(vcpu, lr); + eoicount--; + } + cpuif->used_lrs = 0; } |