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

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

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?

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