From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
bjorn.andersson@linaro.org, tsoni@codeaurora.org,
psodagud@codeaurora.org, sidgup@codeaurora.org
Subject: Re: [PATCH v2 0/3] Expose recovery/coredump configuration from sysfs
Date: Tue, 1 Sep 2020 16:05:42 -0600 [thread overview]
Message-ID: <20200901220542.GA121362@xps15> (raw)
In-Reply-To: <1598557731-1566-1-git-send-email-rishabhb@codeaurora.org>
Hi Rishabh,
On Thu, Aug 27, 2020 at 12:48:48PM -0700, Rishabh Bhatnagar wrote:
> 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.
What I meant wast to move the coredump entry from debugfs to sysfs and from
there make it available to user space using a kernel config. But thinking
further on this it may be better to simply provide an API to set the coredump
mode from the platform driver, the same way rproc_coredump_set_elf_info() works.
That will prevent breaking a fair amount of user space code...
Let me know if that can work for you.
Thanks,
Mathieu
> '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(-)
>
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
next prev parent reply other threads:[~2020-09-01 22:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-27 19:48 [PATCH v2 0/3] Expose recovery/coredump configuration from sysfs Rishabh Bhatnagar
2020-08-27 19:48 ` [PATCH v2 1/3] remoteproc: Expose remoteproc configuration through sysfs Rishabh Bhatnagar
2020-08-27 19:48 ` [PATCH v2 2/3] remoteproc: Add coredump configuration to sysfs Rishabh Bhatnagar
2020-09-10 17:58 ` Greg KH
2020-08-27 19:48 ` [PATCH v2 3/3] remoteproc: Add recovery " Rishabh Bhatnagar
2020-09-01 22:05 ` Mathieu Poirier [this message]
2020-09-02 23:14 ` [PATCH v2 0/3] Expose recovery/coredump configuration from sysfs rishabhb
2020-09-03 19:45 ` Mathieu Poirier
2020-09-03 23:59 ` Bjorn Andersson
2020-09-04 22:02 ` Mathieu Poirier
2020-09-09 17:27 ` rishabhb
2020-09-09 22:08 ` rishabhb
[not found] ` <0101017473e8b9f1-9c800bfd-d724-473f-96b8-c43920cc8967-000000@us-west-2.amazonses.com>
2020-09-10 17:46 ` Mathieu Poirier
2020-09-10 17:59 ` Greg KH
2020-09-15 9:51 ` Arnaud POULIQUEN
2020-09-26 3:31 ` Bjorn Andersson
2020-09-29 7:43 ` Arnaud POULIQUEN
2020-10-14 0:32 ` Bjorn Andersson
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