linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
To: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Rajendra Nayak <rnayak@codeaurora.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	MSM <linux-arm-msm@vger.kernel.org>,
	Marc Gonzalez <marc.w.gonzalez@free.fr>,
	lkml <linux-kernel@vger.kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	David Brown <david.brown@linaro.org>,
	Andy Gross <agross@kernel.org>,
	Sibi Sankar <sibis@codeaurora.org>,
	Vivek Gautam <vivek.gautam@codeaurora.org>,
	Leo Yan <leo.yan@linaro.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCHv9 2/3] arm64: dts: qcom: msm8998: Add Coresight support
Date: Tue, 01 Oct 2019 10:04:14 -0700	[thread overview]
Message-ID: <16212a577339204e901cf4eefa5e82f1@codeaurora.org> (raw)
In-Reply-To: <CAOCk7NrK+wY8jfHdS8781NOQtyLm2RRe1NW2Rm3_zeaot0Q99Q@mail.gmail.com>

On 2019-10-01 09:13, Jeffrey Hugo wrote:
> Sai,
> 
> This patch breaks boot on the 835 laptops.  However, I haven't seen
> the same issue on the MTP.  I wonder, is coresight expected to work
> with production fused devices?  I wonder if thats the difference
> between the laptop and MTP that is causing the issue.
> 
> Let me know what I can do to help debug.
> 

I did test on MSM8998 MTP and didn't face any issue. I am guessing this 
is the same issue which you reported regarding cpuidle? Coresight ETM 
and cpuidle do not work well together since ETMs share the same power 
domain as CPU and they might get turned off when CPU enters idle states. 
Can you try with cpuidle.off=1 cmdline or just remove idle states from 
DT to confirm? If this is the issue, then we can try the below patch 
from Andrew Murray for ETM save and restore:

https://patchwork.kernel.org/patch/11097893/

It is not merged yet. They would appreciate your tested by ;)

Thanks,
Sai

  reply	other threads:[~2019-10-01 17:04 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-31  5:57 [PATCHv9 0/3] Add coresight support for SDM845, MSM8998 and MSM8996 Sai Prakash Ranjan
2019-07-31  5:58 ` [PATCHv9 1/3] arm64: dts: qcom: sdm845: Add Coresight support Sai Prakash Ranjan
2019-07-31  6:05   ` Sai Prakash Ranjan
2019-08-07 10:08     ` Sai Prakash Ranjan
2019-08-07 10:12       ` Suzuki K Poulose
2019-08-07 11:16         ` Sai Prakash Ranjan
2019-07-31  5:58 ` [PATCHv9 2/3] arm64: dts: qcom: msm8998: " Sai Prakash Ranjan
2019-10-01 16:13   ` Jeffrey Hugo
2019-10-01 17:04     ` Sai Prakash Ranjan [this message]
2019-10-01 17:14       ` Jeffrey Hugo
2019-10-01 17:31         ` Suzuki K Poulose
2019-10-01 17:52         ` Sai Prakash Ranjan
2019-10-01 18:01           ` Jeffrey Hugo
2019-10-01 18:05             ` Sai Prakash Ranjan
2019-10-02 15:03               ` Mathieu Poirier
2019-10-03 10:20                 ` Daniel Thompson
2019-10-03 10:52                   ` Suzuki K Poulose
2019-10-03 12:52                     ` Daniel Thompson
2019-07-31  5:58 ` [PATCHv9 3/3] arm64: dts: qcom: msm8996: " Sai Prakash Ranjan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=16212a577339204e901cf4eefa5e82f1@codeaurora.org \
    --to=saiprakash.ranjan@codeaurora.org \
    --cc=agross@kernel.org \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=bjorn.andersson@linaro.org \
    --cc=david.brown@linaro.org \
    --cc=jeffrey.l.hugo@gmail.com \
    --cc=leo.yan@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.w.gonzalez@free.fr \
    --cc=mark.rutland@arm.com \
    --cc=mathieu.poirier@linaro.org \
    --cc=rnayak@codeaurora.org \
    --cc=sibis@codeaurora.org \
    --cc=suzuki.poulose@arm.com \
    --cc=vivek.gautam@codeaurora.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).