linux-kernel - Re: [Freedreno] [PATCH v1 4/4] arm64: dts: sdm845: Add zap shader region for GPU

Open Source and information security mailing list archives

Date:   Thu, 14 Mar 2019 12:59:01 -0400
From:   Rob Clark <robdclark@...il.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Jordan Crouse <jcrouse@...eaurora.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <andy.gross@...aro.org>
Subject: Re: [Freedreno] [PATCH v1 4/4] arm64: dts: sdm845: Add zap shader
 region for GPU

On Thu, Mar 14, 2019 at 1:20 AM Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
>
> On Wed 13 Mar 08:42 PDT 2019, Rob Clark wrote:
>
> > On Tue, Mar 12, 2019 at 2:14 PM Jordan Crouse <jcrouse@...eaurora.org> wrote:
> > >
> > > Some Adreno GPU targets require a special zap shader to bring the GPU
> > > out of secure mode. Define a region to allocate and store the zap
> > > shader.
> > >
> > > Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
> > > ---
> > >
> > >  arch/arm64/boot/dts/qcom/sdm845.dtsi | 11 +++++++++++
> > >  1 file changed, 11 insertions(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > index fed7a29..526456d 100644
> > > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > @@ -100,6 +100,11 @@
> > >                         no-map;
> > >                 };
> > >
> > > +               zap_shader_region: memory@...15000 {
> > > +                       reg = <0 0x8c415000 0 0x2000>;
> > > +                       no-map;
> > > +               };
> > > +
> > >                 mpss_region: memory@...00000 {
> > >                         reg = <0 0x8e000000 0 0x7800000>;
> > >                         no-map;
> > > @@ -109,6 +114,8 @@
> > >                         reg = <0 0x96500000 0 0x200000>;
> > >                         no-map;
> > >                 };
> > > +
> > > +
> >
> > I guess we don't really need this hunk..
> >
>
> I'll trim that as I pick up the patch.
>
> > other than that, the series lgtm
> >
>
> Will you pick up patch 1-3 and I'll pick patch 4 through Andy's tree?

yeah, sounds good.

BR,
-R

> Regards,
> Bjorn
>
> > BR,
> > -R
> >
> > >         };
> > >
> > >         cpus {
> > > @@ -1514,6 +1521,10 @@
> > >
> > >                         qcom,gmu = <&gmu>;
> > >
> > > +                       zap-shader {
> > > +                               memory-region = <&zap_shader_region>;
> > > +                       };
> > > +
> > >                         gpu_opp_table: opp-table {
> > >                                 compatible = "operating-points-v2";
> > >
> > > --
> > > 2.7.4
> > >
> > > _______________________________________________
> > > Freedreno mailing list
> > > Freedreno@...ts.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/freedreno

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