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[0/2] pci sysfs file iomem revoke support

Message ID 20210204165831.2703772-1-daniel.vetter@ffwll.ch
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Series pci sysfs file iomem revoke support | expand

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Daniel Vetter Feb. 4, 2021, 4:58 p.m. UTC 
Hi all,

This is a revised version of patch 12 from my series to lock down some
follow_pfn vs VM_SPECIAL races:

https://lore.kernel.org/dri-devel/CAKwvOdnSrsnTgPEuQJyaOTSkTP2dR9208Y66HQG_h1e2LKfqtw@mail.gmail.com/

Stephen reported an issue on HAVE_PCI_LEGACY platforms which this patch
set tries to address. Previous patches are all still in linux-next.

Stephen, would be awesome if you can give this a spin.

Björn/Greg, review on the first patch is needed, I think that's the
cleanest approach from all the options I discussed with Greg in this
thread:

https://lore.kernel.org/dri-devel/CAKMK7uGrdDrbtj0OyzqQc0CGrQwc2F3tFJU9vLfm2jjufAZ5YQ@mail.gmail.com/

Cheers, Daniel

Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-mm@kvack.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org

Daniel Vetter (2):
  PCI: also set up legacy files only after sysfs init
  PCI: Revoke mappings like devmem

 drivers/pci/pci-sysfs.c | 11 +++++++++++
 drivers/pci/proc.c      |  1 +
 2 files changed, 12 insertions(+)

Comments

Stephen Rothwell Feb. 7, 2021, 7:43 p.m. UTC | #1 
Hi Daniel,

On Thu,  4 Feb 2021 17:58:29 +0100 Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
>
> Hi all,
> 
> This is a revised version of patch 12 from my series to lock down some
> follow_pfn vs VM_SPECIAL races:
> 
> https://lore.kernel.org/dri-devel/CAKwvOdnSrsnTgPEuQJyaOTSkTP2dR9208Y66HQG_h1e2LKfqtw@mail.gmail.com/
> 
> Stephen reported an issue on HAVE_PCI_LEGACY platforms which this patch
> set tries to address. Previous patches are all still in linux-next.
> 
> Stephen, would be awesome if you can give this a spin.

OK, I applied the 2 patches on top of next-20210205 and it no longer
panics for my simple boot test (PowerPC pseries_le_defconfig under
qemu).