linux-kernel - Re: [PATCH 1/2] coresight: etm4x: Expose default timestamp source in sysfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220429162821.GA653442@leoy-ThinkPad-X240s>
Date:   Sat, 30 Apr 2022 00:28:21 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     German Gomez <german.gomez@....com>
Cc:     coresight@...ts.linaro.org, mathieu.poirier@...aro.org,
        suzuki.poulose@....com, james.clark@....com, mike.leach@...aro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] coresight: etm4x: Expose default timestamp source in
 sysfs

On Fri, Apr 29, 2022 at 01:30:59PM +0100, German Gomez wrote:
> Add a new sysfs interface in /sys/bus/coresight/devices/etm<N>/ts_source
> indicating the configured timestamp source when the ETM device driver
> was probed.
> 
> The perf tool will use this information to detect if the trace data
> timestamp matches the kernel time, enabling correlation of CoreSight
> trace with perf events.
> 
> Suggested-by: Suzuki K Poulose <suzuki.poulose@....com>
> Signed-off-by: German Gomez <german.gomez@....com>

Reviewed-by: Leo Yan <leo.yan@...aro.org>