Re: [Xen-devel] [PATCH v3 3/6] xen/arm: do not add a second irq to the LRs if one is already present

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 12/10/2013 06:50 PM, Stefano Stabellini wrote:
> When the guest re-enable IRQs, do not add guest IRQs to LRs twice.
>
> Suggested-by: Julien Grall <julien.grall@xxxxxxxxxx>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>

> ---
>   xen/arch/arm/vgic.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
> index a16bdf1..ab788da 100644
> --- a/xen/arch/arm/vgic.c
> +++ b/xen/arch/arm/vgic.c
> @@ -370,7 +370,7 @@ static void vgic_enable_irqs(struct vcpu *v, uint32_t r, 
> int n)
>           irq = i + (32 * n);
>           p = irq_to_pending(v, irq);
>           set_bit(_GIC_IRQ_GUEST_ENABLED, &p->status);
> -        if ( !list_empty(&p->inflight) )
> +        if ( !list_empty(&p->inflight) && !test_bit(_GIC_IRQ_GUEST_VISIBLE, 
> &p->status) )
>               gic_set_guest_irq(v, irq, GICH_LR_PENDING, p->priority);
>           i++;
>       }
--
Julien Grall

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