linux-kernel - Re: Crash in msm serial on dragonboard with ftrace bootargs

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Message-ID: <CAOh2x=kHQ_PfZqcoDE1+jx-ArMOh4hAFqXxiiKJ9=3JZUySQEw@mail.gmail.com>
Date:   Fri, 16 Nov 2018 09:09:20 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     srinivas.kandagatla@...aro.org
Cc:     saiprakash.ranjan@...eaurora.org,
        Steven Rostedt <rostedt@...dmis.org>, sboyd@...nel.org,
        joel@...lfernandes.org, bjorn.andersson@...aro.org,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Jiri Slaby <jslaby@...e.com>,
        Kees Cook <keescook@...omium.org>, geliangtang@...il.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        gpramod@...eaurora.org,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        linux-serial@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        vivek.gautam@...eaurora.org, sibis@...eaurora.org
Subject: Re: Crash in msm serial on dragonboard with ftrace bootargs

On Thu, Nov 15, 2018 at 4:23 PM Srinivas Kandagatla
<srinivas.kandagatla@...aro.org> wrote:

> Yes, this is not the solution, but it proves that the hand-off between
> booloaders and kernel is the issue.
>
> In general there is wider issue with resources hand-off between
> bootloader and kernel.
>
> There has been some proposal in the past by Viresh for a new framework
> called boot-constriants (https://lkml.org/lkml/2017/12/14/440) which am
> not sure if its still actively looked at. But something similar should
> be the way to address such issues.

It isn't dead code yet and I am waiting to gain few more use-cases
before I attempt
to convince Greg again :)

Here is the code..

git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git boot-constraint

--
viresh