Re: [Xen-devel] [PATCH-4.5 3/4] xen/arm: do not request maintenance_interrupts

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 07/02/14 18:56, Stefano Stabellini wrote:
   > +static void gic_clear_lrs(struct vcpu *v)
> +{
> +    struct pending_irq *p;
> +    int i = 0, irq;
> +    uint32_t lr;
> +    bool_t inflight;
> +
> +    ASSERT(!local_irq_is_enabled());
> +
> +    while ((i = find_next_bit((const long unsigned int *) &this_cpu(lr_mask),
> +                              nr_lrs, i)) < nr_lrs) {
Did you look at to ELRSR{0,1} registers which list the usable LRs? I 
think you can use it with the this_cpu(lr_mask) to avoid browsing every LRs.
--
Julien Grall

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