[v7,0/3] Move recovery/coredump configuration to sysfs

Message

Rishabh Bhatnagar Oct. 2, 2020, 6:09 p.m. UTC

From Android R onwards Google has restricted access to debugfs in user
and user-debug builds. This restricts access to most of the features
exposed through debugfs. 'Coredump' and 'Recovery' are critical
interfaces that are required for remoteproc to work on Qualcomm Chipsets.
This patch series adds recovery/coredump configuration to sysfs interface
and disables coredump collection by default. Having coredump disabled by
default on production devices makes sense.

Changelog:

v7 -> v6:
- Keep the debugfs entries intact for now.
- Reorder the patches to have a consistent sysfs interface.

v6 -> v5:
- Disable coredump collection by default
- Rename the "default" configuration to "enabled" to avoid confusion

v5 -> v4:
- Fix the cover-letter of tha patch series.

v4 -> v3:
- Remove the feature flag to expose recovery/coredump

v3 -> v2:
- Remove the coredump/recovery entries from debugfs
- Expose recovery/coredump from sysfs under a feature flag

v1 -> v2:
- Correct the contact name in the sysfs documentation.
- Remove the redundant write documentation for coredump/recovery sysfs
- Add a feature flag to make this interface switch configurable.

Rishabh Bhatnagar (3):
  remoteproc: Change default dump configuration to "disabled"
  remoteproc: Add coredump as part of sysfs interface
  remoteproc: Add recovery configuration to the sysfs interface

 Documentation/ABI/testing/sysfs-class-remoteproc |  44 +++++++++
 drivers/remoteproc/remoteproc_coredump.c         |   6 +-
 drivers/remoteproc/remoteproc_debugfs.c          |  23 +++--
 drivers/remoteproc/remoteproc_sysfs.c            | 119 +++++++++++++++++++++++
 include/linux/remoteproc.h                       |   8 +-
 5 files changed, 181 insertions(+), 19 deletions(-)