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SubjectRe: [PATCH v5 23/23] KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs
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Hi Marc,

On 3/4/20 9:33 PM, Marc Zyngier wrote:
> The vgic-state debugfs file could do with showing the pending state
> of the HW-backed SGIs. Plug it into the low-level code.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
> virt/kvm/arm/vgic/vgic-debug.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/virt/kvm/arm/vgic/vgic-debug.c b/virt/kvm/arm/vgic/vgic-debug.c
> index cc12fe9b2df3..b13a9e3f99dd 100644
> --- a/virt/kvm/arm/vgic/vgic-debug.c
> +++ b/virt/kvm/arm/vgic/vgic-debug.c
> @@ -178,6 +178,8 @@ static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
> struct kvm_vcpu *vcpu)
> {
> char *type;
> + bool pending;
nit: can be directly initialized to irq->pending_latch
> +
> if (irq->intid < VGIC_NR_SGIS)
> type = "SGI";
> else if (irq->intid < VGIC_NR_PRIVATE_IRQS)
> @@ -190,6 +192,16 @@ static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
> if (irq->intid ==0 || irq->intid == VGIC_NR_PRIVATE_IRQS)
> print_header(s, irq, vcpu);
>
> + pending = irq->pending_latch;
> + if (irq->hw && vgic_irq_is_sgi(irq->intid)) {
> + int err;
> +
> + err = irq_get_irqchip_state(irq->host_irq,
> + IRQCHIP_STATE_PENDING,
> + &pending);
> + WARN_ON_ONCE(err);
> + }
> +
> seq_printf(s, " %s %4d "
> " %2d "
> "%d%d%d%d%d%d%d "
> @@ -201,7 +213,7 @@ static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
> "\n",
> type, irq->intid,
> (irq->target_vcpu) ? irq->target_vcpu->vcpu_id : -1,
> - irq->pending_latch,
> + pending,
> irq->line_level,
> irq->active,
> irq->enabled,
>
The patch looks good to me but I am now lost about how we retrieve the
pending stat of other hw mapped interrupts. Looks we use
irq->pending_latch always. Is that correct?

For the patch:
Reviewed-by: Eric Auger <eric.auger@redhat.com>

Thanks

Eric

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