linux-kernel - Re: [PATCHv2 2/4] arm64: dts: qcom: msm8996: Add Coresight support

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: <6543ad5c-bbcf-b3ec-332c-115e8e3d0825@codeaurora.org>
Date:   Fri, 18 Jan 2019 17:18:01 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Suzuki K Poulose <suzuki.poulose@....com>, robh+dt@...nel.org,
        mathieu.poirier@...aro.org, leo.yan@...aro.org,
        alexander.shishkin@...ux.intel.com, andy.gross@...aro.org,
        david.brown@...aro.org, vivek.gautam@...eaurora.org,
        dianders@...omium.org, sboyd@...nel.org,
        bjorn.andersson@...aro.org, devicetree@...r.kernel.org,
        mark.rutland@....com
Cc:     rnayak@...eaurora.org, sibis@...eaurora.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCHv2 2/4] arm64: dts: qcom: msm8996: Add Coresight support

Hi Suzuki,

On 1/18/2019 4:27 PM, Suzuki K Poulose wrote:
> 
> If you want to use the scatter-gather mode, you must add 
> "arm,scatter-gather"
> property to the node here.
> 
> Have you tested the scatter-gather mode on the chip ? Does that work at 
> all ?
> Note: You could try this by setting a buffer_size > 1M for the ETR and use
> it as a sink from the sysfs mode.
> 

Yes the chip supports scatter-gather mode[1]. But is it required in
dt node since it's an optional property?

[1] 
https://source.codeaurora.org/quic/la/kernel/msm-3.18/tree/arch/arm/boot/dts/qcom/msm8996-coresight-v3.dtsi?h=LA.BR.5.6#n24

Thanks,
Sai
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation