Re: [Xen-devel] [PATCH v3 30/39] ARM: new VGIC: Dump virtual IRQ info

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 21 Mar 2018, Andre Przywara wrote:
> When we dump guest state on the Xen console, we also print the state of
> IRQs that are on a VCPU.
> Add the code to dump the state of an IRQ handled by the new VGIC.
> 
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
> Acked-by: Julien Grall <julien.grall@xxxxxxx>

Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

> ---
>  xen/arch/arm/vgic/vgic.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/xen/arch/arm/vgic/vgic.c b/xen/arch/arm/vgic/vgic.c
> index 8aaad4bffa..79c6a5553d 100644
> --- a/xen/arch/arm/vgic/vgic.c
> +++ b/xen/arch/arm/vgic/vgic.c
> @@ -766,6 +766,31 @@ void vgic_free_virq(struct domain *d, unsigned int virq)
>      clear_bit(virq, d->arch.vgic.allocated_irqs);
>  }
>  
> +void gic_dump_vgic_info(struct vcpu *v)
> +{
> +    struct vgic_cpu *vgic_cpu = &v->arch.vgic;
> +    struct vgic_irq *irq;
> +    unsigned long flags;
> +
> +    spin_lock_irqsave(&v->arch.vgic.ap_list_lock, flags);
> +
> +    if ( !list_empty(&vgic_cpu->ap_list_head) )
> +        printk("   active or pending interrupts queued:\n");
> +
> +    list_for_each_entry ( irq, &vgic_cpu->ap_list_head, ap_list )
> +    {
> +        spin_lock(&irq->irq_lock);
> +        printk("     %s %s irq %u: %spending, %sactive, %senabled\n",
> +               irq->hw ? "hardware" : "virtual",
> +               irq->config == VGIC_CONFIG_LEVEL ? "level" : "edge",
> +               irq->intid, irq_is_pending(irq) ? "" : "not ",
> +               irq->active ? "" : "not ", irq->enabled ? "" : "not ");
> +        spin_unlock(&irq->irq_lock);
> +    }
> +
> +    spin_unlock_irqrestore(&v->arch.vgic.ap_list_lock, flags);
> +}
> +
>  struct irq_desc *vgic_get_hw_irq_desc(struct domain *d, struct vcpu *v,
>                                        unsigned int virq)
>  {
> -- 
> 2.14.1
> 

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