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Re: [Xen-devel] [PATCH] xen/arm: introduce platform_need_explicit_eoi

On 06/27/2014 04:51 PM, Ian Campbell wrote:
> On Mon, 2014-06-23 at 11:43 +0100, Stefano Stabellini wrote:
>> I thought about this concurrency problem and I think I managed to
>> solve it correctly. The solution I used was introducing a new flag
>> 1402504032-13267-4-git-send-email-stefano.stabellini@xxxxxxxxxxxxx
> So, I'm not sure whether I should apply this patch now or wait for that
> series to go in first. What should I do?

IIRC, I've asked Stefano to rewrote a bit the following paragraph.

> No need to find the pcpu that needs to write to GICC_DIR, because after
> "physical irq follow virtual irq" we always inject the virtual irq on
> the vcpu that is running on the pcpu that received the interrupt.

The "physical irq follow virtual irq" is part of the migration series
but this is not the reason that make GICC_DIR working. This is GIC
specific (even though, I can't find a clearly define behavior in the


Julien Grall

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