Re: [Xen-devel] [BUG] pci-passthrough generates "xen:events: Failed to obtain physical IRQ" for some devices

[Marek Marczykowski-GÃrecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On Wed, Feb 03, 2016 at 10:26:58AM -0500, Konrad Rzeszutek Wilk wrote:
> On Wed, Feb 03, 2016 at 03:22:30PM +0100, Marek Marczykowski-GÃrecki wrote:
> > On Mon, Feb 01, 2016 at 09:50:53AM -0500, Konrad Rzeszutek Wilk wrote:
> > > > The second bullet looks at first pretty interesting from this PoV,
> > > > seeÂhttp://xenbits.xen.org/xsa/advisory-157.htmlÂfor info on the XSA and
> > > > the various patches. Konrad is on the CC already so hopefully he has 
> > > > some
> > > > ideas.
> > > 
> > > Thanks. I will try to reproduce this with the upstream kernel first as
> > > those patches are there.
> > 
> > According to one Qubes OS user report[1], the bug was introduced between
> > version, which differs only by XSA-155 patches (including one for
> > pciback), especially not XSA-157. 
> > Maybe on some code path, some value is not copied back to pdev->sh_info->op?
> 
> I found two bugs (attached the draft not-compiled patches). Upstream
> wise I seem to be tripping over another issue.
> 
> There is also some more work required in there to fix the MSI-x enable op.

What exactly do you have in mind here? That four patches in your next
email? Or something not yet fixed?

-- 
Best Regards,
Marek Marczykowski-GÃrecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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