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Re: [PATCH v2] xen/arm: implement GICD_I[S/C]ACTIVER reads
- To: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
- From: Julien Grall <julien@xxxxxxx>
- Date: Fri, 17 Apr 2020 17:07:02 +0100
- Cc: Peng Fan <peng.fan@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "maz@xxxxxxxxxx" <maz@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxx>, Wei Xu <xuwei5@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, nd <nd@xxxxxxx>, Julien Grall <julien.grall.oss@xxxxxxxxx>
- Delivery-date: Fri, 17 Apr 2020 16:07:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi Bertrand,
On 17/04/2020 16:16, Bertrand Marquis wrote:
It seems that the problem is a bit bigger then expected and will need
more discussion and thinking.
I did some research on my side and there are several design possible
depending on what should be the goal performance or real-time behaviour
(going from just give the status we have to fire a service interrupts
when any interrupts is acked by a guest to refresh our internal status).
In the short term, could we not agree to fix the typo by returning
always 0 and start a discussion on the vgic implementation ?
I have already pointed out multiple time now ([1], [2]) that I would not
oppose the temporary solution. I think this is a matter of someone
(Stefano?) to submit it :).
Cheers,
[1]
https://lists.xenproject.org/archives/html/xen-devel/2019-11/msg01642.html
[2]
https://lists.xenproject.org/archives/html/xen-devel/2020-04/msg00459.html
--
Julien Grall
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