linux-kernel - Re: [PATCH RFC v2 14/17] include: acpi: actbl2: Add structs for RQSC table

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Message-ID: <CAJZ5v0gZaijBJBT24ZZkXPpqggkbXHqVB2u-MOaNJ7X0Ls08pA@mail.gmail.com>
Date: Wed, 28 Jan 2026 21:50:41 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Drew Fustini <fustini@...nel.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Radim Krčmář <rkrcmar@...tanamicro.com>, 
	Samuel Holland <samuel.holland@...ive.com>, Adrien Ricciardi <aricciardi@...libre.com>, 
	Nicolas Pitre <npitre@...libre.com>, Kornel Dulęba <mindal@...ihalf.com>, 
	Atish Patra <atish.patra@...ux.dev>, Atish Kumar Patra <atishp@...osinc.com>, 
	Vasudevan Srinivasan <vasu@...osinc.com>, Ved Shanbhogue <ved@...osinc.com>, 
	yunhui cui <cuiyunhui@...edance.com>, Chen Pei <cp0613@...ux.alibaba.com>, 
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	linux-acpi@...r.kernel.org, acpica-devel@...ts.linux.dev, 
	devicetree@...r.kernel.org
Subject: Re: [PATCH RFC v2 14/17] include: acpi: actbl2: Add structs for RQSC table

On Wed, Jan 28, 2026 at 9:44 PM Drew Fustini <fustini@...nel.org> wrote:
>
> On Wed, Jan 28, 2026 at 09:31:16PM +0100, Rafael J. Wysocki wrote:
> > On Wed, Jan 28, 2026 at 9:28 PM Drew Fustini <fustini@...nel.org> wrote:
> > >
> > > Add structs for the RQSC table which describes the properties of the
> > > RISC-V QoS controllers (CBQRI) in the system. The table also describes
> > > the topological arrangement of the QoS controllers and resources in the
> > > system. The topology is expressed in terms of the location of the
> > > resources within the system and the relation between the QoS Controller
> > > and the resource it manages.
> > >
> > > Link: https://github.com/riscv-non-isa/riscv-cbqri/releases/tag/v1.0
> > > Link: https://github.com/riscv-non-isa/riscv-rqsc/blob/main/src/chapter2.adoc
> > > Signed-off-by: Drew Fustini <fustini@...nel.org>
> >
> > Of course, this change needs to go through upstream ACPICA.
>
> Thank you for pointing this out. I've not worked with ACPI prior to
> dealing with the RQSC table.
>
> Is the pull request for RISC-V RIMT a good example of how to do that?
> https://github.com/acpica/acpica/pull/1003

I think so.

You may also have a look at
Documentation/driver-api/acpi/linuxized-acpica.rst (sorry for the
counter-intuitive location).

As a general rule, Linux patches that change the ACPICA code need to
be auto-generated from the corresponding upstream ACPICA commits (and
when you do so, please add a Link: tag pointing to the source ACPICA
commit to the Linux patch).