linux-kernel - Re: [PATCH v4 0/3] Move recovery/coredump configuration to sysfs

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Message-ID: <500895ac9667a82f0ca65696145858f2@codeaurora.org>
Date:   Fri, 18 Sep 2020 10:15:36 -0700
From:   rishabhb@...eaurora.org
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     bjorn.andersson@...aro.org, ohad@...ery.com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        tsoni@...eaurora.org, psodagud@...eaurora.org,
        sidgup@...eaurora.org
Subject: Re: [PATCH v4 0/3] Move recovery/coredump configuration to sysfs

On 2020-09-17 16:40, Randy Dunlap wrote:
> On 9/17/20 11:56 AM, 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 removes the 
>> recovery/coredump
>> entries from debugfs and moves them to sysfs.
>> '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:
>> 
>> 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: 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(-)
>> 
> 
> Hi,
> 
> Is there a patch 3/3?
> This email (reply) is patch 0/3, then I see
>                       patch 1/2
>                       patch 2/2
> so I'm confused.  However, the diffstat above references a Kconfig file
> and neither patch 1/2 nor patch 2/2 contains any Kconfig changes.
> 
> thanks.
Hi Randy,
The cover letter got messed up. There are only 2 patches now whereas in 
the
earlier versions there were 3 patches. I'll be sending out v5 soon.
Please review that.