Re: [REGRESSION] amd-pstate doesn't work since v5.18.11

Oleksandr Natalenko
2022-07-12T21:55:23Z

Hello.

On úterý 12. července 2022 22:07:15 CEST Limonciello, Mario wrote:
> See if this helps out:
>
> diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c
> index 734b96454896..88a81e6b9228 100644
> --- a/arch/x86/kernel/acpi/cppc.c
> +++ b/arch/x86/kernel/acpi/cppc.c
> @@ -16,6 +16,13 @@ bool cpc_supported_by_cpu(void)
> switch (boot_cpu_data.x86_vendor) {
> case X86_VENDOR_AMD:
> case X86_VENDOR_HYGON:
> + if (boot_cpu_data.x86 == 0x19 &&
> + ((boot_cpu_data.x86_model >= 0x00 &&
> boot_cpu_data.x86_model <= 0x0f) ||
> + (boot_cpu_data.x86_model >= 0x20 &&
> boot_cpu_data.x86_model <= 0x2f)))
> + return true;
> + else if (boot_cpu_data.x86 == 0x17 &&
> + boot_cpu_data.x86_model >= 0x70 &&
> boot_cpu_data.x86_model <= 0x7f)
> + return true;
> return boot_cpu_has(X86_FEATURE_CPPC);
> }
> return false;
>
> If that works and no one has a better idea how to do it for these
> systems I'll send out a proper proper patch tomorrow.

This patch (also mirrored here [1]) works for me, thanks.

[1] https://codeberg.org/pf-kernel/linux/commit/cc5c57b8c349c85b81b44cf5fe2d2577b947a7de

--
Oleksandr Natalenko (post-factum)