Re: [Xen-devel] [PATCH v2] x86: re-inject emulated level pirqs in PV on HVM guests if still asserted

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 21/11/2011 11:06, "Stefano Stabellini" <stefano.stabellini@xxxxxxxxxxxxx>
wrote:

> On Mon, 21 Nov 2011, Jan Beulich wrote:
>>>>> On 18.11.11 at 12:13, Stefano Stabellini
>>>>> <stefano.stabellini@xxxxxxxxxxxxx>
>> wrote:
>>> This patch is a backport of CS 24007 for xen-4.1-testing.
>>> 
>>> PV on HVM guests can loose level interrupts coming from emulated
>>> devices if they have been remapped onto event channels.  The reason is
>>> that we are missing the code to inject a pirq again in the guest when
>>> the guest EOIs it, if it corresponds to an emulated level interrupt
>>> and the interrupt is still asserted.
>>> 
>>> Fix this issue and also return error when the guest tries to get the
>>> irq_status of a non-existing pirq.
>>> 
>>> 
>>> Changes in v2:
>>> 
>>> - move the spinlock afterward to cover the new code only.
>> 
>> This, as expected, doesn't hang anymore with kernels making use of
>> the PIRQ EOI map.
> 
> Thanks for testing!
> Keir, are you happy with the patch?

Yes, I applied it already.

 -- Keir



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