Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
KVM: arm64: GICv2: Handle LR overflow when EOImode==0
Similarly to the GICv3 version, handle the EOIcount-driven deactivation
by walking the overflow list.
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-38-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
authored by
Marc Zyngier
and committed by
Oliver Upton
281c6c06
78ffc284
+27
+27
arch/arm64/kvm/vgic/vgic-v2.c
+27
arch/arm64/kvm/vgic/vgic-v2.c
···
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vgic_put_irq(vcpu->kvm, irq);
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}
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+
static u32 vgic_v2_compute_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq);
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+
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/*
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* transfer the content of the LRs back into the corresponding ap_list:
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* - active bit is transferred as is
···
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{
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struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
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struct vgic_v2_cpu_if *cpuif = &vgic_cpu->vgic_v2;
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u32 eoicount = FIELD_GET(GICH_HCR_EOICOUNT, cpuif->vgic_hcr);
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struct vgic_irq *irq;
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DEBUG_SPINLOCK_BUG_ON(!irqs_disabled());
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for (int lr = 0; lr < vgic_cpu->vgic_v2.used_lrs; lr++)
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vgic_v2_fold_lr(vcpu, cpuif->vgic_lr[lr]);
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+
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/* See the GICv3 equivalent for the EOIcount handling rationale */
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list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) {
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u32 lr;
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if (!eoicount) {
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break;
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} else {
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guard(raw_spinlock)(&irq->irq_lock);
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+
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if (!(likely(vgic_target_oracle(irq) == vcpu) &&
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irq->active))
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continue;
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lr = vgic_v2_compute_lr(vcpu, irq) & ~GICH_LR_ACTIVE_BIT;
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}
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+
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if (lr & GICH_LR_HW)
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writel_relaxed(FIELD_GET(GICH_LR_PHYSID_CPUID, lr),
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kvm_vgic_global_state.gicc_base + GIC_CPU_DEACTIVATE);
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vgic_v2_fold_lr(vcpu, lr);
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eoicount--;
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}
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cpuif->used_lrs = 0;
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}