Re: [PATCH v3 8/8] PCI/quirks: Avoid certain address on Genoa systems

[Andy Shevchenko <andriy.shevchenko@intel.com>]

On Tue, Oct 13, 2026 at 05:40:10PM -0500, Bjorn Helgaas wrote:
> [+cc Hans, Kai-Heng, Andy, linux-acpi]

If you want my opinion, I think that Mario's quirk series (with the revert of
the 07eab0901ede) [2] is the way to go. I have not much time to dive into this,
though. I also have no HW to reproduce either of the problems.

> On Tue, Oct 13, 2026 at 01:59:23PM -0500, Mario Limonciello wrote:
> > On 10/13/26 12:26, Ilpo Järvinen wrote:
> > > On Tue, 13 Oct 2026, Mario Limonciello wrote:
> > > > On 10/13/26 12:00, Mario Limonciello wrote:
> > > > > On 10/13/26 08:09, Ilpo Järvinen wrote:

[2] https://git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/log/?h=superm1/genoa-mess

> > Bjorn, thoughts on this?  I'll send it out if that's the way we want
> > to go (or Ilpo feel free to subsume into your series as it's only
> > really exposed by your series at the moment)
> 
> I would LOVE it if we can use those patches because it's way less
> magic than 07eab0901ede is.
> 
> But I'm frankly terrified to touch it because I'm skeptical that two
> more quirks are enough.  I just expect that whatever strategy BIOS
> uses to build these maps is likely to be used on many models.  I do
> hate 07eab0901ede though, so I would love to see it gone.
> 
> I do think the description [1] is overly specific because AFAIK
> there's nothing that connects this to AMD EPYC 9354 or igb other than
> the fact that it was seen there.  It could happen to any PCI device on
> any system with similar memory maps.
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/commit/?h=superm1/genoa-mess&id=0a49c704477153d6597d34b3c6e3141007ff058c

-- 
With Best Regards,
Andy Shevchenko