linux-kernel - RE: [PATCH 1/8] x86/amd: Move amd_get_highest

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

Message-ID:
 <CYYPR12MB8655396ADBB331E00D74C6BA9C942@CYYPR12MB8655.namprd12.prod.outlook.com>
Date: Tue, 27 Aug 2024 06:29:19 +0000
From: "Yuan, Perry" <Perry.Yuan@....com>
To: Mario Limonciello <superm1@...nel.org>, Borislav Petkov <bp@...en8.de>,
	"Shenoy, Gautham Ranjal" <gautham.shenoy@....com>
CC: "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
	"Rafael J . Wysocki" <rafael@...nel.org>, "open list:X86 ARCHITECTURE (32-BIT
 AND 64-BIT)" <linux-kernel@...r.kernel.org>, "open list:ACPI"
	<linux-acpi@...r.kernel.org>, "open list:CPU FREQUENCY SCALING FRAMEWORK"
	<linux-pm@...r.kernel.org>, "Limonciello, Mario" <Mario.Limonciello@....com>
Subject: RE: [PATCH 1/8] x86/amd: Move amd_get_highest_perf() from amd.c to
 cppc.c

[AMD Official Use Only - AMD Internal Distribution Only]

> -----Original Message-----
> From: Mario Limonciello <superm1@...nel.org>
> Sent: Tuesday, August 27, 2024 5:14 AM
> To: Borislav Petkov <bp@...en8.de>; Shenoy, Gautham Ranjal
> <gautham.shenoy@....com>; Yuan, Perry <Perry.Yuan@....com>
> Cc: maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT) <x86@...nel.org>;
> Rafael J . Wysocki <rafael@...nel.org>; open list:X86 ARCHITECTURE (32-BIT
> AND 64-BIT) <linux-kernel@...r.kernel.org>; open list:ACPI <linux-
> acpi@...r.kernel.org>; open list:CPU FREQUENCY SCALING FRAMEWORK
> <linux-pm@...r.kernel.org>; Limonciello, Mario
> <Mario.Limonciello@....com>
> Subject: [PATCH 1/8] x86/amd: Move amd_get_highest_perf() from amd.c to
> cppc.c
>
> From: Mario Limonciello <mario.limonciello@....com>
>
> 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@....com>
> ---
>  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@....com>