linux-kernel - Re: [PATCH v2] soc: qcom: cmd-db: Map shared memory as WC, not WB

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Message-ID: <de7930b1-6f33-4ff5-911d-e5156a020585@quicinc.com>
Date: Thu, 18 Jul 2024 13:25:14 +0530
From: Pavan Kondeti <quic_pkondeti@...cinc.com>
To: Caleb Connolly <caleb.connolly@...aro.org>
CC: Pavan Kondeti <quic_pkondeti@...cinc.com>,
        Maulik Shah
	<quic_mkshah@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        "Konrad
 Dybcio" <konrad.dybcio@...aro.org>, <stephan@...hold.net>,
        <swboyd@...omium.org>, <dianders@...omium.org>, <robdclark@...il.com>,
        <nikita@...n.ru>, <quic_eberman@...cinc.com>, <quic_lsrao@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Volodymyr
 Babchuk" <Volodymyr_Babchuk@...m.com>,
        <stable@...r.kernel.org>
Subject: Re: [PATCH v2] soc: qcom: cmd-db: Map shared memory as WC, not WB

On Thu, Jul 18, 2024 at 09:42:27AM +0200, Caleb Connolly wrote:
> Hi Pavan,
> 
> > 
> > Thanks Maulik for sharing the patch. It works as expected. Feel free to
> > use
> 
> Can I ask how you're testing this?
> 
> Kind regards,
> > 
> > Tested-by: Pavankumar Kondeti <quic_pkondeti@...cinc.com>
> > 
> 

The QCM6490 RB3 board boots from upstream kernel. As part of releases
here [1] we plan to support booting Linux in EL2. Currently, I have an
internal board/build with firmware allowing this already. I have boot tested
Maulik's patch (and as well v1 patch). The targets gets reset early in
the boot up w/o this patch and I could boot w/ this patch.

Thanks,
Pavan

[1] https://github.com/quic-yocto/qcom-manifest