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From: "H. Peter Anvin" <hpa@zytor.com>
To: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: hasan@digitalpath.net, linux-kernel@vger.kernel.org
Subject: Re: Access MSR functions in userspace?
Date: Tue, 05 Feb 2008 21:59:20 -0800	[thread overview]
Message-ID: <47A94CB8.3020303@zytor.com> (raw)
In-Reply-To: <200802060600.35498.maximlevitsky@gmail.com>

Maxim Levitsky wrote:
> On Wednesday, 6 February 2008 05:29:47 Hasan Rashid wrote:
>> Is there a way to use RDMSR and WRMSR in userspace? I only need to write
>> to one register, writing a module with a userspace piece to handle that
>> seems like an over kill.
>>
>> TIA!
> 
> 
> Fortunately linux have /dev/cpu/*/msr
> Take  look at $LINUX_SOURCES/arch/x86/kernel/msr.c to learn how to use it.
> 

You might also find these useful:

http://www.kernel.org/pub/linux/utils/cpu/msr-tools/msr-tools-1.1.2.tar.bz2

	-hpa

  reply	other threads:[~2008-02-06  5:59 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-06  3:29 Access MSR functions in userspace? Hasan Rashid
2008-02-06  4:00 ` Maxim Levitsky
2008-02-06  5:59   ` H. Peter Anvin [this message]
     [not found] <200802070037.m170b4Bb000579@terminus.zytor.com>
2008-02-07  0:48 ` H. Peter Anvin
     [not found] <200802070059.m170xqHv008164@terminus.zytor.com>
2008-02-07  1:09 ` H. Peter Anvin

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