linux-kernel - Re: Get the min and max frequency of a processor

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: <20120831122616.GA4083@x1.osrc.amd.com>
Date:	Fri, 31 Aug 2012 14:26:17 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Marcos Souza <marcos.souza.org@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Get the min and max frequency of a processor

On Fri, Aug 31, 2012 at 06:52:46AM -0300, Marcos Souza wrote:
> Nothing is wrong with access /sys, but I thought there was another
> way, like an API or something else.

Ah, there's no API, AFAICT.

Also, tools/power/cpupower/ uses sysfs too - you could reuse that
code if you don't feel like writing it yourself. The function is
cpufreq_get_hardware_limits()

Ok, technically, there is also a way to query the CPU's MSRs directly
but this is a bit more involved than reading sysfs nodes.

HTH.

-- 
Regards/Gruss,
Boris.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/