PCI/AER: Keep ANFE masked on Apple T2 Secure Enclave

Browse source

Commit eddba19b8b ("PCI/AER: Support Advisory Non-Fatal Errors")
unmasks Advisory Non-Fatal Errors on devices which support Role-Based
Error Reporting. On a MacBookPro16,1, enabling ANFE on the Apple T2
Secure Enclave Processor [106b:1802] causes spontaneous power loss.

Leave the Secure Enclave's ANFE mask unchanged. Set a per-device flag
with an EARLY fixup, before pci_aer_init() can unmask ANFE; a FINAL fixup
would run too late. Keep the advertised RBER capability and all other
AER initialization and reporting unchanged. Other Apple T2 functions
and non-Apple devices retain the existing ANFE behavior.

Setting the flag repeatedly and skipping the ANFE unmask operation are
idempotent. The underlying device or firmware failure is not understood.

[bhelgaas: Aditya posted essentially the same patch soon after:
https://lore.kernel.org/all/20261010172301.12764-1-aditya.garg@linux.dev]

Fixes: eddba19b8b ("PCI/AER: Support Advisory Non-Fatal Errors")
Reported-by: Jason Perlow <jperlow@gmail.com>
Closes: https://lore.kernel.org/linux-pci/CABZrw2HcaOh3DHTJtxU5dXrb3Vg19scr6+qR-xe_+R7rME35_Q@mail.gmail.com/
Assisted-by: LLM
Signed-off-by: Jason Perlow <jperlow@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/CABZrw2H+3yt2Y7xiq6OyAWaJM7P9ox-2nJxoQuJMwoJHLgi+YQ@mail.gmail.com/

...

This commit is contained in:

Jason Perlow 2026-10-12 14:51:27 -05:00 • committed by Bjorn Helgaas

parent cee9395acd

commit 7209846a16

3 changed files with 14 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

drivers/pci/pcie/aer.c

View file

11

drivers/pci/quirks.c

View file

1

include/linux/pci.h

View file