linux-kernel - [PATCH v2 0/3] Expose recovery/coredump configuration from sysfs

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Message-Id: <1598557731-1566-1-git-send-email-rishabhb@codeaurora.org>
Date:   Thu, 27 Aug 2020 12:48:48 -0700
From:   Rishabh Bhatnagar <rishabhb@...eaurora.org>
To:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     bjorn.andersson@...aro.org, mathieu.poirier@...aro.org,
        tsoni@...eaurora.org, psodagud@...eaurora.org,
        sidgup@...eaurora.org, Rishabh Bhatnagar <rishabhb@...eaurora.org>
Subject: [PATCH v2 0/3] Expose recovery/coredump configuration from sysfs

>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. This patch series adds a configurable option
to move the recovery/coredump interfaces to sysfs. If the feature
flag is selected it would move these interfaces to sysfs and remove
the equivalent debugfs interface. 'Coredump' and 'Recovery' are critical
interfaces that are required for remoteproc to work on Qualcomm Chipsets.
Coredump configuration needs to be set to "inline" in debug/test build
and "disabled" in production builds. Whereas recovery needs to be
"disabled" for debugging purposes and "enabled" on production builds.

Changelog:

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: Expose remoteproc configuration through sysfs
  remoteproc: Add coredump configuration to sysfs
  remoteproc: Add recovery configuration to sysfs

 Documentation/ABI/testing/sysfs-class-remoteproc |  44 ++++++++
 drivers/remoteproc/Kconfig                       |  12 +++
 drivers/remoteproc/remoteproc_debugfs.c          |  10 +-
 drivers/remoteproc/remoteproc_sysfs.c            | 126 +++++++++++++++++++++++
 4 files changed, 190 insertions(+), 2 deletions(-)

-- 
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a Linux Foundation Collaborative Project