linux-kernel - Re: [PATCH v5 4/5] platform/x86/amd: pmc: use FCH_PM

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 for Android: free password hash cracker in your pocket

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

Message-ID: <21363441-13a0-b5bc-4674-238526b16b5b@linux.intel.com>
Date: Tue, 29 Apr 2025 17:39:04 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Mario Limonciello <superm1@...nel.org>
cc: Borislav Petkov <bp@...en8.de>, Jean Delvare <jdelvare@...e.com>, 
    Andi Shyti <andi.shyti@...nel.org>, Jonathan Corbet <corbet@....net>, 
    Mario Limonciello <mario.limonciello@....com>, 
    Yazen Ghannam <yazen.ghannam@....com>, 
    Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
    Dave Hansen <dave.hansen@...ux.intel.com>, 
    "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>, 
    "H . Peter Anvin" <hpa@...or.com>, 
    Shyam Sundar S K <Shyam-sundar.S-k@....com>, 
    Hans de Goede <hdegoede@...hat.com>, 
    "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>, 
    open list <linux-kernel@...r.kernel.org>, 
    "open list:I2C/SMBUS CONTROLLER DRIVERS FOR PC" <linux-i2c@...r.kernel.org>, 
    "open list:AMD PMC DRIVER" <platform-driver-x86@...r.kernel.org>
Subject: Re: [PATCH v5 4/5] platform/x86/amd: pmc: use FCH_PM_BASE
 definition

On Tue, 22 Apr 2025, Mario Limonciello wrote:

> From: Mario Limonciello <mario.limonciello@....com>
> 
> The s2idle mmio quirk uses a scratch register in the FCH.
> Adjust the code to clarify that.
> 
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>

This is quite trivial change, but here is this for completeness in case 
x86 maintainers want to have it:

Acked-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

--
 i.

> ---
> v5:
>  * Move <asm> header after <linux> headers
> v4:
>  * Use fch.h instead
> ---
>  arch/x86/include/asm/amd/fch.h            | 1 +
>  drivers/platform/x86/amd/pmc/pmc-quirks.c | 3 ++-
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/include/asm/amd/fch.h b/arch/x86/include/asm/amd/fch.h
> index a5fd91ff92df3..9b32e8a03193e 100644
> --- a/arch/x86/include/asm/amd/fch.h
> +++ b/arch/x86/include/asm/amd/fch.h
> @@ -8,5 +8,6 @@
>  /* register offsets from PM base */
>  #define FCH_PM_DECODEEN			0x00
>  #define FCH_PM_DECODEEN_SMBUS0SEL	GENMASK(20, 19)
> +#define FCH_PM_SCRATCH			0x80
>  
>  #endif
> diff --git a/drivers/platform/x86/amd/pmc/pmc-quirks.c b/drivers/platform/x86/amd/pmc/pmc-quirks.c
> index b4f49720c87f6..b706b1f4d94bf 100644
> --- a/drivers/platform/x86/amd/pmc/pmc-quirks.c
> +++ b/drivers/platform/x86/amd/pmc/pmc-quirks.c
> @@ -11,6 +11,7 @@
>  #include <linux/dmi.h>
>  #include <linux/io.h>
>  #include <linux/ioport.h>
> +#include <asm/amd/fch.h>
>  
>  #include "pmc.h"
>  
> @@ -20,7 +21,7 @@ struct quirk_entry {
>  };
>  
>  static struct quirk_entry quirk_s2idle_bug = {
> -	.s2idle_bug_mmio = 0xfed80380,
> +	.s2idle_bug_mmio = FCH_PM_BASE + FCH_PM_SCRATCH,
>  };
>  
>  static struct quirk_entry quirk_spurious_8042 = {
>