linux-kernel - Re: [PATCH 1/2] Add sysfs based cpuinfo structure

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

Message-ID: <20170802160420.GA18507@kroah.com>
Date:   Wed, 2 Aug 2017 09:04:20 -0700
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Felix Schnizlein <fschnizlein@...e.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        yanmin.zhang@...el.com, mingo@...hat.com, trenn@...e.com
Subject: Re: [PATCH 1/2] Add sysfs based cpuinfo structure

On Wed, Aug 02, 2017 at 05:14:11PM +0200, Felix Schnizlein wrote:
> Create a new sysfs attribute group called 'info' for each
> online cpu. The cleaned up cpuinfo shows up in a sysfs
> subdirectory here: /sys/devices/system/cpu/cpu#/info.
> 
> Define preprocessor macros (CPUINFO_DEFINE_* and CPUINFO_ATTR) to make
> defining new sysfs attributes for cpuinfo more easy.
> 
> Add basic documentation for the info sysfs tree.
> 
> Signed-off-by: Felix Schnizlein <fschnizlein@...e.com>
> Signed-off-by: Thomas Renninger <trenn@...e.com>
> ---
>  Documentation/ABI/testing/sysfs-devices-system-cpu | 17 ++++++++
>  arch/Kconfig                                       |  3 ++
>  drivers/base/Makefile                              |  1 +
>  drivers/base/cpuinfo.c                             | 48 ++++++++++++++++++++++
>  include/linux/cpuhotplug.h                         |  1 +
>  include/linux/cpuinfo.h                            | 43 +++++++++++++++++++
>  6 files changed, 113 insertions(+)
>  create mode 100644 drivers/base/cpuinfo.c
>  create mode 100644 include/linux/cpuinfo.h
> 
> diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
> index f3d5817..fbaf165 100644
> --- a/Documentation/ABI/testing/sysfs-devices-system-cpu
> +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
> @@ -373,3 +373,20 @@ Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
>  Description:	information about CPUs heterogeneity.
>  
>  		cpu_capacity: capacity of cpu#.
> +
> +What:		/sys/devices/system/cpu/cpu#/info/
> +Date:		June 2017
> +Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
> +Description:	Various information about the online cpu. Which attributes are
> +		available depends on the architecture, kernel configuration and
> +                cpu model.

tabs?

> +
> +What:		/sys/devices/system/cpu/cpu#/info/
> +		/sys/devices/system/cpu/cpu#/info/vendor_id
> +		/sys/devices/system/cpu/cpu#/info/cpu_family
> +		/sys/devices/system/cpu/cpu#/info/model
> +		/sys/devices/system/cpu/cpu#/info/model_name
> +		/sys/devices/system/cpu/cpu#/info/stepping
> +		/sys/devices/system/cpu/cpu#/info/flags
> +		/sys/devices/system/cpu/cpu#/info/bugs
> +		/sys/devices/system/cpu/cpu#/info/bogomips

Can you guarantee that all arches will be able to provide these?

thanks,

greg k-h