linux-kernel - [PATCH 0/3] Add support for hidden choices to platform

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-next>] [day] [month] [year] [list]

Message-ID: <20250228170155.2623386-1-superm1@kernel.org>
Date: Fri, 28 Feb 2025 11:01:52 -0600
From: Mario Limonciello <superm1@...nel.org>
To: Shyam Sundar S K <Shyam-sundar.S-k@....com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	"Luke D . Jones" <luke@...nes.dev>,
	Mark Pearson <mpearson-lenovo@...ebb.ca>
Cc: platform-driver-x86@...r.kernel.org (open list:AMD PMF DRIVER),
	linux-kernel@...r.kernel.org (open list),
	linux-acpi@...r.kernel.org (open list:ACPI),
	"Derek J . Clark" <derekjohn.clark@...il.com>,
	Antheas Kapenekakis <lkml@...heas.dev>,
	me@...egospodneti.ch,
	Denis Benato <benato.denis96@...il.com>,
	Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH 0/3] Add support for hidden choices to platform_profile

From: Mario Limonciello <mario.limonciello@....com>

When two drivers provide platform profile handlers but use different
strings to mean (essentially) the same thing the legacy interface won't
export them because it only shows profiles common to multiple drivers.

This causes an unexpected behavior to people who have upgraded from an
earlier kernel because if multiple drivers have bound platform profile
handlers they might not be able to access profiles they were expecting.

Introduce a concept of a "hidden choice" that drivers can register and
the platform profile handler code will utilize when using the legacy
interface.

There have been some other attempts at solving this issue in other ways.
This serves as an alternative to those attempts.

Link: https://lore.kernel.org/platform-driver-x86/e64b771e-3255-42ad-9257-5b8fc6c24ac9@gmx.de/T/#t
Link: https://lore.kernel.org/platform-driver-x86/CAGwozwF-WVEgiAbWbRCiUaXf=BVa3KqmMJfs06trdMQHpTGmjQ@mail.gmail.com/T/#m2f3929e2d4f73cc0eedd14738170dad45232fd18
Cc: Antheas Kapenekakis <lkml@...heas.dev>
Cc: "Luke D. Jones" <luke@...nes.dev>

Mario Limonciello (3):
  ACPI: platform_profile: Add support for hidden choices
  platform/x86/amd: pmf: Add 'quiet' to hidden choices
  platform/x86/amd: pmf: Add balanced-performance to hidden choices

 drivers/acpi/platform_profile.c    | 94 +++++++++++++++++++++++-------
 drivers/platform/x86/amd/pmf/sps.c | 11 ++++
 include/linux/platform_profile.h   |  3 +
 3 files changed, 87 insertions(+), 21 deletions(-)

-- 
2.43.0