Re: [PATCH 5/6] xen/arm: Only enable physical IRQs when the guest asks

[Julien Grall <julien.grall@linaro.org>]

On 12/06/2013 05:26 PM, Stefano Stabellini wrote:
> From: Julien Grall <julien.grall@linaro.org>
>
> From: Julien Grall <julien.grall@linaro.org>
>
> Set/Unset IRQ_DISABLED from gic_irq_enable and gic_irq_disable.
> Enable IRQs when the guest requests it, not unconditionally at boot time.
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> Signed-off-by: Julien Grall <julien.grall@citrix.com>
> ---

[..]

> @@ -605,6 +603,8 @@ int __init setup_dt_irq(const struct dt_irq *irq, struct irqaction *new)
>
>       rc = __setup_irq(desc, irq->irq, new);
>
> +    desc->handler->startup(desc);
> +

You forgot to take the GIC lock here.

>       spin_unlock_irqrestore(&desc->lock, flags);
>
>       return rc;
> @@ -743,6 +743,7 @@ int gic_route_irq_to_guest(struct domain *d, const struct dt_irq *irq,
>       unsigned long flags;
>       int retval;
>       bool_t level;
> +    struct pending_irq *p;
>
>       action = xmalloc(struct irqaction);
>       if (!action)
> @@ -769,6 +770,10 @@ int gic_route_irq_to_guest(struct domain *d, const struct dt_irq *irq,
>           goto out;
>       }
>
> +    /* do not assume delivery to vcpu0 */

I would add TODO: in the comment.

-- 
Julien Grall