linux-kernel - overriding BIOS (was: Re: [ANNOUNCE] kvm howto)

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Message-ID: <20061113203421.GA5363@irc.pl>
Date:	Mon, 13 Nov 2006 21:34:21 +0100
From:	Tomasz Torcz <zdzichu@....pl>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	kvm-devel@...ts.sourceforge.net
Subject: overriding BIOS (was: Re: [ANNOUNCE] kvm howto)

On Mon, Nov 06, 2006 at 12:15:02AM -0800, Dor Laor wrote:
> The BIOS check is a must, it checks bit #0 of MSR_IA32_FEATURE_CONTROL,
> if it set this means that software cannot write to the MSR. If bit #2 is
> clear too then when executing vmxon you'll get #GP.
> 
> So the check should better be there...

  You were right, just writing to this MSR (via kvm_enable) halts my laptop.
 Which is kinda strange, as this solution works on Intel Mac Minis.

  Anyway, complaint to Lenovo sent and got ignored.

-- 
Tomasz Torcz       ,,(...) today's high-end is tomorrow's embedded processor.''
zdzichu@....-nie.spam-.pl                      -- Mitchell Blank on LKML


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