RE: [PATCH 1/8] x86/amd: Move amd_get_highest_perf() from amd.c to cppc.c

[Yuan, Perry]

[AMD Official Use Only - AMD Internal Distribution Only]

> -----Original Message-----
> From: Mario Limonciello <superm1@xxxxxxxxxx>
> Sent: Tuesday, August 27, 2024 5:14 AM
> To: Borislav Petkov <bp@xxxxxxxxx>; Shenoy, Gautham Ranjal
> <gautham.shenoy@xxxxxxx>; Yuan, Perry <Perry.Yuan@xxxxxxx>
> Cc: maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT) <x86@xxxxxxxxxx>;
> Rafael J . Wysocki <rafael@xxxxxxxxxx>; open list:X86 ARCHITECTURE (32-BIT
> AND 64-BIT) <linux-kernel@xxxxxxxxxxxxxxx>; open list:ACPI <linux-
> acpi@xxxxxxxxxxxxxxx>; open list:CPU FREQUENCY SCALING FRAMEWORK
> <linux-pm@xxxxxxxxxxxxxxx>; Limonciello, Mario
> <Mario.Limonciello@xxxxxxx>
> Subject: [PATCH 1/8] x86/amd: Move amd_get_highest_perf() from amd.c to
> cppc.c
>
> From: Mario Limonciello <mario.limonciello@xxxxxxx>
>
> To prepare to let amd_get_highest_perf() detect preferred cores it will require
> CPPC functions. Move amd_get_highest_perf() to cppc.c to prepare for
> 'preferred core detection' rework.
>
> No functional changes intended.
>
> Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
> ---
>  arch/x86/kernel/acpi/cppc.c | 16 ++++++++++++++++
>  arch/x86/kernel/cpu/amd.c   | 16 ----------------
>  2 files changed, 16 insertions(+), 16 deletions(-)
>
> diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c index
> ff8f25faca3dd..7ec8f2ce859c8 100644
> --- a/arch/x86/kernel/acpi/cppc.c
> +++ b/arch/x86/kernel/acpi/cppc.c
> @@ -116,3 +116,19 @@ void init_freq_invariance_cppc(void)
>       init_done = true;
>       mutex_unlock(&freq_invariance_lock);
>  }
> +
> +u32 amd_get_highest_perf(void)
> +{
> +     struct cpuinfo_x86 *c = &boot_cpu_data;
> +
> +     if (c->x86 == 0x17 && ((c->x86_model >= 0x30 && c->x86_model <
> 0x40) ||
> +                            (c->x86_model >= 0x70 && c->x86_model <
> 0x80)))
> +             return 166;
> +
> +     if (c->x86 == 0x19 && ((c->x86_model >= 0x20 && c->x86_model <
> 0x30) ||
> +                            (c->x86_model >= 0x40 && c->x86_model <
> 0x70)))
> +             return 166;
> +
> +     return 255;
> +}
> +EXPORT_SYMBOL_GPL(amd_get_highest_perf);
> diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index
> 1e0fe5f8ab84e..015971adadfc7 100644
> --- a/arch/x86/kernel/cpu/amd.c
> +++ b/arch/x86/kernel/cpu/amd.c
> @@ -1190,22 +1190,6 @@ unsigned long amd_get_dr_addr_mask(unsigned
> int dr)  }  EXPORT_SYMBOL_GPL(amd_get_dr_addr_mask);
>
> -u32 amd_get_highest_perf(void)
> -{
> -     struct cpuinfo_x86 *c = &boot_cpu_data;
> -
> -     if (c->x86 == 0x17 && ((c->x86_model >= 0x30 && c->x86_model <
> 0x40) ||
> -                            (c->x86_model >= 0x70 && c->x86_model <
> 0x80)))
> -             return 166;
> -
> -     if (c->x86 == 0x19 && ((c->x86_model >= 0x20 && c->x86_model <
> 0x30) ||
> -                            (c->x86_model >= 0x40 && c->x86_model <
> 0x70)))
> -             return 166;
> -
> -     return 255;
> -}
> -EXPORT_SYMBOL_GPL(amd_get_highest_perf);
> -
>  static void zenbleed_check_cpu(void *unused)  {
>       struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
> --
> 2.43.0
>

LGTM, thanks!

Reviewed-by: Perry Yuan <perry.yuan@xxxxxxx>