]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
ACPI: CPPC: enable AMD CPPC V2 support for family 17h processors
authorPerry Yuan <perry.yuan@amd.com>
Thu, 8 Feb 2024 03:46:28 +0000 (11:46 +0800)
committerSasha Levin <sashal@kernel.org>
Tue, 26 Mar 2024 22:19:36 +0000 (18:19 -0400)
commitfa797951513c0803d59bdd0c5e21c68f5e6e9d19
tree6fe35da368dee3f9d72b6181cbe29b128ec56c41
parent1155f56ce76d2d145df5990f81e53213b658c72a
ACPI: CPPC: enable AMD CPPC V2 support for family 17h processors

[ Upstream commit a51ab63b297ce9e26e3ffb9be896018a42d5f32f ]

As there are some AMD processors which only support CPPC V2 firmware and
BIOS implementation, the amd_pstate driver will be failed to load when
system booting with below kernel warning message:

[    0.477523] amd_pstate: the _CPC object is not present in SBIOS or ACPI disabled

To make the amd_pstate driver can be loaded on those TR40 processors, it
needs to match x86_model from 0x30 to 0x7F for family 17H.
With the change, the system can load amd_pstate driver as expected.

Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reported-by: Gino Badouri <badouri.g@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218171
Fixes: fbd74d1689 ("ACPI: CPPC: Fix enabling CPPC on AMD systems with shared memory")
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
arch/x86/kernel/acpi/cppc.c