Re: [Xen-devel] [PATCH-4.5 v2 07/10] xen/arm: don't protect GICH and lr_queue accesses with gic.lock

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Stefano,

On 02/14/2014 03:51 PM, Stefano Stabellini wrote:
> GICH is banked, protect accesses by disabling interrupts.
> Protect lr_queue accesses with the vgic.lock only.
> gic.lock only protects accesses to GICD now.
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> ---
>  xen/arch/arm/gic.c  |   22 +++-------------------
>  xen/arch/arm/vgic.c |   12 ++++++++++--
>  2 files changed, 13 insertions(+), 21 deletions(-)
> 
> diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
> index 0955d48..6386ccb 100644
> --- a/xen/arch/arm/gic.c
> +++ b/xen/arch/arm/gic.c
> @@ -667,19 +667,14 @@ void gic_remove_from_queues(struct vcpu *v, unsigned 
> int virtual_irq)
>  {
>      struct pending_irq *p = irq_to_pending(v, virtual_irq);
>  
> -    spin_lock(&gic.lock);
>      if ( !list_empty(&p->lr_queue) )
>          list_del_init(&p->lr_queue);
> -    spin_unlock(&gic.lock);
>  }

This patch doesn't apply correctly on the latest master. The commit
0ddaeff has replace spin_lock by spin_lock_irqsave.

You need to rebase your patches series at least on top of this patch.

Regards,

-- 
Julien Grall

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