linux-kernel - Re: [PATCH v2 1/3] dt-bindings: riscv: sifive: Add SiFive Private L2 cache controller

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: <20230728-facedown-husked-9813fa79d9a0@wendy>
Date:   Fri, 28 Jul 2023 08:05:46 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Conor Dooley <conor@...nel.org>
CC:     Eric Lin <eric.lin@...ive.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <palmer@...belt.com>, <paul.walmsley@...ive.com>,
        <will@...nel.org>, <mark.rutland@....com>, <tglx@...utronix.de>,
        <peterz@...radead.org>, <devicetree@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <zong.li@...ive.com>, <greentime.hu@...ive.com>,
        <vincent.chen@...ive.com>, Nick Hu <nick.hu@...ive.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: riscv: sifive: Add SiFive Private L2
 cache controller

On Thu, Jul 20, 2023 at 06:10:51PM +0100, Conor Dooley wrote:
> Hey Eric,
> 
> On Thu, Jul 20, 2023 at 09:51:19PM +0800, Eric Lin wrote:
> > This add YAML DT binding documentation for SiFive Private L2
> > cache controller
> > 
> > Signed-off-by: Eric Lin <eric.lin@...ive.com>
> > Reviewed-by: Zong Li <zong.li@...ive.com>
> > Reviewed-by: Nick Hu <nick.hu@...ive.com>
> > ---
> >  .../bindings/cache/sifive,pl2cache.yaml       | 62 +++++++++++++++++++
> 
> btw, your $subject should be "dt-bindings: cache: ...." rather than
> "riscv: sifive".
> 
> >  1 file changed, 62 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/cache/sifive,pl2cache.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/cache/sifive,pl2cache.yaml b/Documentation/devicetree/bindings/cache/sifive,pl2cache.yaml
> > new file mode 100644
> > index 000000000000..ee8356c5eeee
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/cache/sifive,pl2cache.yaml
> > @@ -0,0 +1,62 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +# Copyright (C) 2023 SiFive, Inc.
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/cache/sifive,pl2cache.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: SiFive Private L2 Cache Controller
> > +
> > +maintainers:
> > +  - Greentime Hu  <greentime.hu@...ive.com>
> > +  - Eric Lin  <eric.lin@...ive.com>
> 
> There's extra spaces in these lines for some reason.
> 
> > +
> > +description:
> > +  The SiFive Private L2 Cache Controller is per core and
> > +  communicates with both the upstream L1 caches and
> > +  downstream L3 cache or memory, enabling a high-performance
> > +  cache subsystem.
> > +
> > +allOf:
> > +  - $ref: /schemas/cache-controller.yaml#
> > +
> 
> I'm pretty sure that I pointed out last time around that you need to add
> something like in the ccache driver:
> 
> select:
>   properties:
>     compatible:
>       contains:
>         enum:
>           - sifive,ccache0
>           - sifive,fu540-c000-ccache
>           - sifive,fu740-c000-ccache
> 
> otherwise this binding will be used for anything containing "cache" in
> the dt-binding.
> For this binding, I think that the following is sufficient:
> 
> select:
>   properties:
>     compatible:
>       contains:
>           const: sifive,pl2cache1
> 
> > +properties:
> > +  compatible:
> > +    items:
> > +      - const: sifive,pl2cache1
> > +      - const: cache
> 
> You omitted the pl2cache0 from here, that needs to come back! You'll end
> up with 2 items entries.
> Either way, I can't take this binding without a soc-specific compatible,
> per sifive-blocks-ip-versioning.txt..

Further, "sifive,perfmon-counters" is an undocumented property.

Thanks,
Conor.

Download attachment "signature.asc" of type "application/pgp-signature" (229 bytes)