Messages in this thread Patch in this message | | | From | Oliver Upton <> | Subject | [PATCH v3 04/10] KVM: arm64: vgic-its: Walk the LPI xarray in vgic_copy_lpi_list() | Date | Fri, 16 Feb 2024 18:41:47 +0000 |
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Start iterating the LPI xarray in anticipation of removing the LPI linked-list.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev> --- arch/arm64/kvm/vgic/vgic-its.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/vgic/vgic-its.c b/arch/arm64/kvm/vgic/vgic-its.c index fb2d3c356984..9ce2edfadd11 100644 --- a/arch/arm64/kvm/vgic/vgic-its.c +++ b/arch/arm64/kvm/vgic/vgic-its.c @@ -335,6 +335,7 @@ static int update_lpi_config(struct kvm *kvm, struct vgic_irq *irq, int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr) { struct vgic_dist *dist = &kvm->arch.vgic; + XA_STATE(xas, &dist->lpi_xa, GIC_LPI_OFFSET); struct vgic_irq *irq; unsigned long flags; u32 *intids; @@ -353,7 +354,9 @@ int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr) return -ENOMEM; raw_spin_lock_irqsave(&dist->lpi_list_lock, flags); - list_for_each_entry(irq, &dist->lpi_list_head, lpi_list) { + rcu_read_lock(); + + xas_for_each(&xas, irq, INTERRUPT_ID_BITS_ITS) { if (i == irq_count) break; /* We don't need to "get" the IRQ, as we hold the list lock. */ @@ -361,6 +364,8 @@ int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr) continue; intids[i++] = irq->intid; } + + rcu_read_unlock(); raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags); *intid_ptr = intids; -- 2.44.0.rc0.258.g7320e95886-goog
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