From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: [PATCH v4 05/17] xen/arm: ITS: implement
 hw_irq_controller for LPIs
Date: Thu, 16 Jul 2015 17:27:49 +0100
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To: Ian Campbell <ian.campbell@citrix.com>
Cc: Vijay Kilari <vijay.kilari@gmail.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, "Prasun.Kapoor@caviumnetworks.com" <Prasun.Kapoor@caviumnetworks.com>, Vijaya Kumar K <vijaya.kumar@caviumnetworks.com>, Tim Deegan <tim@xen.org>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, Julien Grall <julien.grall@citrix.com>, "stefano.stabellini@citrix.com" <stefano.stabellini@citrix.com>, "manish.jaggi@caviumnetworks.com" <manish.jaggi@caviumnetworks.com>
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On 16/07/15 17:18, Ian Campbell wrote:
> On Thu, 2015-07-16 at 16:21 +0100, Marc Zyngier wrote:
>> Hope this helps,
> 
> It, plus the chat we had on IRC did, yes, thanks.
> 
> In summary:
> 
> I was very confusedly talking about INV when I meant SYNC.
> 
> There is a real issue with the update of its_dev->collection in
> its_set_affinity since it will result in the wrong collection being used
> for subsequent affinity operations.

Yeah, this is a very stupid bug on my side, and I realize that I never
saw it because the whole ITS driver has been written on a model that can
only generate a single interrupt per device. Lovely.

> Marc is intending to replace its_dev->collection with an array
> (presumably dynamically allocated) in its_dev mapping eventid to a
> collection.

Exactly.

> I think that is probably the right answer for Xen too.

I'd think so.

Thanks so much for putting me right!

	M.
-- 
Jazz is not dead. It just smells funny...