From: Tomasz Torcz <zdzichu@irc.pl>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: kvm-devel@lists.sourceforge.net
Subject: overriding BIOS (was: Re: [ANNOUNCE] kvm howto)
Date: Mon, 13 Nov 2006 21:34:21 +0100 [thread overview]
Message-ID: <20061113203421.GA5363@irc.pl> (raw)
In-Reply-To: <64F9B87B6B770947A9F8391472E0321608EBF537@ehost011-8.exch011.intermedia.net>
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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@irc.-nie.spam-.pl -- Mitchell Blank on LKML
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WARNING: multiple messages have this Message-ID (diff)
From: Tomasz Torcz <zdzichu-YxaM2a6SwlU@public.gmane.org>
To: linux-kernel <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: overriding BIOS (was: Re: [ANNOUNCE] kvm howto)
Date: Mon, 13 Nov 2006 21:34:21 +0100 [thread overview]
Message-ID: <20061113203421.GA5363@irc.pl> (raw)
In-Reply-To: <64F9B87B6B770947A9F8391472E0321608EBF537-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@public.gmane.org>
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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@irc.-nie.spam-.pl -- Mitchell Blank on LKML
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next prev parent reply other threads:[~2006-11-13 20:34 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-02 13:25 [ANNOUNCE] kvm howto Avi Kivity
2006-11-02 14:27 ` Hesse, Christian
2006-11-02 14:32 ` Avi Kivity
2006-11-02 14:32 ` Avi Kivity
2006-11-02 15:14 ` Magnus Damm
2006-11-02 15:14 ` Magnus Damm
2006-11-02 15:19 ` Avi Kivity
2006-11-02 15:19 ` Avi Kivity
2006-11-05 17:14 ` Tomasz Torcz
2006-11-06 8:15 ` Dor Laor
2006-11-13 20:34 ` Tomasz Torcz [this message]
2006-11-13 20:34 ` overriding BIOS (was: Re: [ANNOUNCE] kvm howto) Tomasz Torcz
2006-11-13 20:39 ` Arjan van de Ven
2006-11-13 20:39 ` Arjan van de Ven
2006-11-06 8:51 ` [ANNOUNCE] kvm howto Avi Kivity
2006-11-06 10:14 ` Arjan van de Ven
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