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From: Will Deacon <will@kernel.org>
To: Thomas Renninger <trenn@suse.de>
Cc: linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org,
	Felix Schnizlein <fschnizlein@suse.de>,
	linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux@armlinux.org.uk, will.deacon@arm.com, x86@kernel.org,
	fschnitzlein@suse.de, Felix Schnizlein <fschnizlein@suse.com>
Subject: Re: [PATCH 3/3] arm64 cpuinfo: implement sysfs nodes for arm64
Date: Mon, 9 Dec 2019 10:31:11 +0000	[thread overview]
Message-ID: <20191209103110.GB3306@willie-the-truck> (raw)
In-Reply-To: <20191206162421.15050-4-trenn@suse.de>

On Fri, Dec 06, 2019 at 05:24:21PM +0100, Thomas Renninger wrote:
> From: Felix Schnizlein <fschnizlein@suse.de>
> 
> Export all information from /proc/cpuinfo to sysfs:
> implementer, architecture, variant, part, revision,
> bogomips and flags are exported.
> 
> Example:
> /sys/devices/system/cpu/cpu1/info/:[0]# head *
> ==> architecture <==
> 8
> 
> ==> bogomips <==
> 40.00
> 
> ==> flags <==
> fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid asimdrdm
> 
> ==> implementer <==
> 0x51
> 
> ==> part <==
> 0xc00
> 
> ==> revision <==
> 1
> 
> ==> variant <==
> 0x0
> 
> Signed-off-by: Thomas Renninger <trenn@suse.de>
> Signed-off-by: Felix Schnizlein <fschnizlein@suse.com>
> ---
>  Documentation/ABI/testing/sysfs-devices-system-cpu | 22 +++++++++
>  arch/arm64/Kconfig                                 |  1 +
>  arch/arm64/kernel/cpuinfo.c                        | 55 ++++++++++++++++++++++
>  3 files changed, 78 insertions(+)

I don't understand why we need this on arm64 and why it's an improvement
over all the other schemes we already support for identifying CPU features.

Given the pain we've endured over the years exposing this sort of stuff to
userspace, I'm relucant to add more just for the fun of it.

Will

WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: Thomas Renninger <trenn@suse.de>
Cc: linux-arch@vger.kernel.org,
	Felix Schnizlein <fschnizlein@suse.de>,
	Felix Schnizlein <fschnizlein@suse.com>,
	gregkh@linuxfoundation.org, x86@kernel.org, will.deacon@arm.com,
	linux@armlinux.org.uk, linux-kernel@vger.kernel.org,
	fschnitzlein@suse.de, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/3] arm64 cpuinfo: implement sysfs nodes for arm64
Date: Mon, 9 Dec 2019 10:31:11 +0000	[thread overview]
Message-ID: <20191209103110.GB3306@willie-the-truck> (raw)
In-Reply-To: <20191206162421.15050-4-trenn@suse.de>

On Fri, Dec 06, 2019 at 05:24:21PM +0100, Thomas Renninger wrote:
> From: Felix Schnizlein <fschnizlein@suse.de>
> 
> Export all information from /proc/cpuinfo to sysfs:
> implementer, architecture, variant, part, revision,
> bogomips and flags are exported.
> 
> Example:
> /sys/devices/system/cpu/cpu1/info/:[0]# head *
> ==> architecture <==
> 8
> 
> ==> bogomips <==
> 40.00
> 
> ==> flags <==
> fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid asimdrdm
> 
> ==> implementer <==
> 0x51
> 
> ==> part <==
> 0xc00
> 
> ==> revision <==
> 1
> 
> ==> variant <==
> 0x0
> 
> Signed-off-by: Thomas Renninger <trenn@suse.de>
> Signed-off-by: Felix Schnizlein <fschnizlein@suse.com>
> ---
>  Documentation/ABI/testing/sysfs-devices-system-cpu | 22 +++++++++
>  arch/arm64/Kconfig                                 |  1 +
>  arch/arm64/kernel/cpuinfo.c                        | 55 ++++++++++++++++++++++
>  3 files changed, 78 insertions(+)

I don't understand why we need this on arm64 and why it's an improvement
over all the other schemes we already support for identifying CPU features.

Given the pain we've endured over the years exposing this sort of stuff to
userspace, I'm relucant to add more just for the fun of it.

Will

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2019-12-09 10:31 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-06 16:24 [PATCH v5 0/3] sysfs: add sysfs based cpuinfo Thomas Renninger
2019-12-06 16:24 ` Thomas Renninger
2019-12-06 16:24 ` [PATCH 1/3] cpuinfo: add sysfs based arch independent cpuinfo framework Thomas Renninger
2019-12-06 16:24   ` Thomas Renninger
2019-12-06 16:33   ` Greg KH
2019-12-06 16:33     ` Greg KH
2019-12-06 16:33     ` Greg KH
2019-12-06 16:56   ` Randy Dunlap
2019-12-06 16:56     ` Randy Dunlap
2019-12-06 16:56     ` Randy Dunlap
2019-12-06 16:24 ` [PATCH 2/3] x86 cpuinfo: implement sysfs nodes for x86 Thomas Renninger
2019-12-06 16:24   ` Thomas Renninger
2019-12-06 16:36   ` Greg KH
2019-12-06 16:36     ` Greg KH
2019-12-10 20:48     ` Thomas Gleixner
2019-12-10 20:48       ` Thomas Gleixner
2019-12-10 20:53       ` Greg KH
2019-12-10 20:53         ` Greg KH
2019-12-11 10:42       ` Thomas Renninger
2019-12-11 10:42         ` Thomas Renninger
2019-12-11 13:56         ` Greg KH
2019-12-11 13:56           ` Greg KH
2019-12-11 14:12           ` Thomas Renninger
2019-12-11 14:12             ` Thomas Renninger
2019-12-11 14:26             ` Greg KH
2019-12-11 14:26               ` Greg KH
2019-12-11 14:52               ` Thomas Renninger
2019-12-11 14:52                 ` Thomas Renninger
2019-12-11 14:57                 ` Greg KH
2019-12-11 14:57                   ` Greg KH
2019-12-06 16:24 ` [PATCH 3/3] arm64 cpuinfo: implement sysfs nodes for arm64 Thomas Renninger
2019-12-06 16:24   ` Thomas Renninger
2019-12-06 16:37   ` Greg KH
2019-12-06 16:37     ` Greg KH
2019-12-09 10:31   ` Will Deacon [this message]
2019-12-09 10:31     ` Will Deacon
2019-12-09 11:28     ` Thomas Renninger
2019-12-09 11:28       ` Thomas Renninger
2019-12-09 17:38       ` Will Deacon
2019-12-09 17:38         ` Will Deacon
2019-12-10 13:33         ` Thomas Renninger
2019-12-10 13:33           ` Thomas Renninger
2019-12-10 14:47           ` Greg KH
2019-12-10 14:47             ` Greg KH
2019-12-10 16:24             ` Thomas Renninger
2019-12-10 16:24               ` Thomas Renninger
2019-12-06 16:58 ` [PATCH v5 0/3] sysfs: add sysfs based cpuinfo Mark Rutland
2019-12-06 16:58   ` Mark Rutland
2019-12-06 17:29   ` Thomas Renninger
2019-12-06 17:29     ` Thomas Renninger
2019-12-06 18:16     ` Mark Rutland
2019-12-06 18:16       ` Mark Rutland

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