linux-kernel - [PATCH v6 0/3] Extend coredump functionality

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Message-Id: <1593460933-4262-1-git-send-email-rishabhb@codeaurora.org>
Date:   Mon, 29 Jun 2020 13:02:10 -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 v6 0/3] Extend coredump functionality

This patch series moves the coredump functionality to a separate
file and adds "inline" coredump feature. Inline coredump directly
copies segments from device memory during coredump to userspace.
This avoids extra memory usage at the cost of speed. Recovery is
stalled until all data is read by userspace.

Changelog:

v6 -> v5:
- Fix unsigned comaprison with negative bug found on gcc-9.3.0

v5 -> v4:
- Rebase on top of linux-next

v4 -> v3:
- Write a helper function to copy segment memory for every dump format
- Change segment dump fn to add offset and size adn covert mss driver

v3 -> v2:
- Move entire coredump functionality to remoteproc_coredump.c
- Modify rproc_coredump to perform dump according to conf. set by userspace
- Move the userspace configuration to debugfs from sysfs.
- Keep the default coredump implementation as is

v2 -> v1:
- Introduce new file for coredump.
- Add userspace sysfs configuration for dump type.

Rishabh Bhatnagar (3):
  remoteproc: Move coredump functionality to a new file
  remoteproc: Add inline coredump functionality
  remoteproc: Add coredump debugfs entry

 drivers/remoteproc/Makefile              |   1 +
 drivers/remoteproc/qcom_q6v5_mss.c       |   9 +-
 drivers/remoteproc/remoteproc_core.c     | 191 ------------------
 drivers/remoteproc/remoteproc_coredump.c | 328 +++++++++++++++++++++++++++++++
 drivers/remoteproc/remoteproc_debugfs.c  |  86 ++++++++
 drivers/remoteproc/remoteproc_internal.h |   4 +
 include/linux/remoteproc.h               |  21 +-
 7 files changed, 443 insertions(+), 197 deletions(-)
 create mode 100644 drivers/remoteproc/remoteproc_coredump.c

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