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Date: Fri, 13 Jan 2017 13:44:27 -0500 From: Boris Ostrovsky <boris.ostrovsky@...cle.com> To: Stefano Stabellini <sstabellini@...nel.org> Cc: jgross@...e.com, karahmed@...zon.de, linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org, konrad.wilk@...cle.com Subject: Re: [PATCH v2] partially revert "xen: Remove event channel notification through Xen PCI platform device" On 01/13/2017 01:26 PM, Stefano Stabellini wrote: > On Fri, 13 Jan 2017, Boris Ostrovsky wrote: >> On 01/12/2017 04:39 PM, Stefano Stabellini wrote: >>> The following commit: >>> >>> commit 72a9b186292d98494f222226cfd24a1621796209 >>> Author: KarimAllah Ahmed <karahmed@...zon.de> >>> Date: Fri Aug 26 23:55:36 2016 +0200 >>> >>> xen: Remove event channel notification through Xen PCI platform device >>> >>> broke Linux when booting as Dom0 on Xen in a nested Xen environment (Xen >>> installed inside a Xen VM). In this scenario, Linux is a PV guest, but >>> at the same time it uses the platform-pci driver to receive >>> notifications from L0 Xen. vector callbacks are not available because L1 >>> Xen doesn't allow them. >>> >>> Partially revert the offending commit, by restoring IRQ based >>> notifications for PV guests only. I restored only the code which is >>> strictly needed and replaced the xen_have_vector_callback checks within >>> it with xen_pv_domain() checks. >>> >>> Signed-off-by: Stefano Stabellini <sstabellini@...nel.org> >> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com> > Applied to xentip/for-linus-4.10, improving the commit message as > suggested before. > > Do you plan on sending out another pull request for 4.10? Juergen? BTW, this probably wants to go to 4.9-stable too? -boris
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