linux-kernel - Re: kdb: add rdmsr and wrmsr commands for i386

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Date:	Thu, 17 May 2007 02:36:21 -0400
From:	Bernardo Innocenti <bernie@...ewiz.org>
To:	Keith Owens <kaos@....com>
CC:	Jordan Crouse <jordan.crouse@....com>, kdb@....sgi.com,
	linux-kernel@...r.kernel.org, devel@...top.org
Subject: Re: kdb: add rdmsr and wrmsr commands for i386

Keith Owens wrote:

> Before using MSR, you must first check that the cpu supports the
> instruction, rd/wrmsr cause an oops on 486 or earlier.  Also using an
> invalid msr number causes an oops, so use rd/wrmsr_safe().

I didn't bother implementing those checks because kdb recovers
nicely from GPF anyway.  It's the valid MSR writes that could
cause unrecoveable problems! :)

-- 
   // Bernardo Innocenti
 \X/  http://www.codewiz.org/
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