[RFC PATCH] iommu/amd: fix a race in fetch_pte()

[Joerg Roedel]

Hi Qian,

On Sun, May 03, 2020 at 09:04:03AM -0400, Qian Cai wrote:
> > On Apr 29, 2020, at 7:20 AM, Joerg Roedel <joro at 8bytes.org> wrote:
> > Can you please test this branch:
> > 
> > 	https://git.kernel.org/pub/scm/linux/kernel/git/joro/linux.git/log/?h=amd-iommu-fixes
> > 
> > It has the previous fix in it and a couple more to make sure the
> > device-table is updated and flushed before increase_address_space()
> > updates domain->pt_root.
> 
> I believe this closed the existing races as it had survived for many
> days. Great work!

Thanks a lot for testing these changes! Can I add your Tested-by when I
send them to the mailing list tomorrow?

Regards,

	Joerg