Re: [PATCH v3] PCI: vmd: Handle BUS_RESTRICT_CFG value 3 for Arrow Lake-HX

["Krzysztof Wilczyński" <kwilczynski@kernel.org>]

Hello,

Added Szymon and Mariusz here directly, and moved Nirmal from Cc to To,
so he can get this message directly, too.
  
> > I am Lin Mohan, the reporter of
> > https://bugzilla.kernel.org/show_bug.cgi?id=221137.
> > 
> > Since commit 22b47bd49e45 ("PCI: vmd: Handle BUS_RESTRICT_CFG value 3
> > for Arrow Lake-HX") has already been merged, could you please add the
> > following tags in a follow-up fix?
> > 
> > Reported-by: Lin Mohan <linmhwork@outlook.com>
> > Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221137
> > Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221136
> > 
> > This patch fixes the same Mode 3 / Dynamic Bus Offset issue I
> > reported on the 8086:09ab VMD device (Arrow Lake-S).
> 
> Thanks very much for confirming this!
> 
> I added the tags to the commit on pci/controller/vmd.
> 
> I do still question whether that commit includes sufficient support
> for this Mode 3 feature, so I'm hoping Nirmal or someone else from
> Intel will chime in.

There was a series[1] posted not that long time ago, which seemed to have
been also incorporating work around the same thing that this patch aims to
fix, albeit with more details, at the first glance.  The progress on the
series seemed to have stalled, though, sadly.

I am including both authors directly here, alongside Nirmal, hopefully for
some comment and perhaps a review, etc.

1. https://lore.kernel.org/linux-pci/20260625082940.1290740-8-szymon.durawa@linux.intel.com/

Thank you!

	Krzysztof