linux-kernel - Re: [PATCH 0/5] ACPI: bus:

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Message-ID: <CAJZ5v0hKwThcAO4jMOzi7ySqSv_jHvs_+paBB212qVsaf7LZng@mail.gmail.com>
Date: Tue, 12 Mar 2024 21:10:49 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Armin Wolf <W_Armin@....de>
Cc: rafael@...nel.org, lenb@...nel.org, linux-acpi@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] ACPI: bus: _OSC fixes

On Sat, Mar 9, 2024 at 9:13 PM Armin Wolf <W_Armin@....de> wrote:
>
> This patch series fixes the handling of various ACPI features bits
> when evaluating _OSC.
>
> The first three patches fix the reporting of various features supported
> by the kernel, while the fourth patch corrects the feature bit used to
> indicate support for the "Generic Initiator Affinity" in SRAT.
>
> The last patch fixes the reporting of IRQ ResourceSource support. Unlike
> the other feature bits, the ACPI specification states that this feature
> bit might be used by the ACPI firmware to indicate whether or not it
> supports the usage of IRQ ResourceSource:
>
>         "If not set, the OS may choose to ignore the ResourceSource
>          parameter in the extended interrupt descriptor."
>
> Since the code responsible for parsing IRQ ResourceSource already checks
> if ResourceSource is present, i assumed that we can omit taking this
> into account.
>
> All patches where tested on a Asus Prime B650-Plus and a Dell Inspiron
> 3505.
>
> Armin Wolf (5):
>   ACPI: bus: Indicate support for _TFP thru _OSC
>   ACPI: bus: Indicate support for more than 16 p-states thru _OSC
>   ACPI: bus: Indicate support for the Generic Event Device thru _OSC
>   ACPI: Fix Generic Initiator Affinity _OSC bit
>   ACPI: bus: Indicate support for IRQ ResourceSource thru _OSC
>
>  drivers/acpi/bus.c   | 5 +++++
>  include/linux/acpi.h | 6 +++++-
>  2 files changed, 10 insertions(+), 1 deletion(-)
>
> --

All of that looks reasonable to me, but do you know about systems in
the field where any of these patches actually fix functionality?

If not, I'd prefer to queue them up for 6.10 as they are likely to
change behavior, at least in corner cases.

Thanks!