Re: VMX disabled by Feature Control MSR

[Jean-Pierre Dion <jean-pierre.dion@bull.net>]

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ok we will try get the right bios
for our platform.

thanks


jean-pierre


Kamble, Nitin A wrote:

>Yes, Keir is correct. Once it is locked you can not unlock it by just
>clearing the bit. Probably what you need is, enabling of VMX feature in
>the BIOS, and then hard reset the system.
>
>Thanks & Regards,
>Nitin
>------------------------------------------------------------------------
>-----------
>Open Source Technology Center, Intel Corp
>
>  
>
>>-----Original Message-----
>>From: xen-devel-bounces@lists.xensource.com [mailto:xen-devel-
>>bounces@lists.xensource.com] On Behalf Of Keir Fraser
>>Sent: Wednesday, June 14, 2006 5:47 AM
>>To: Guillaume Thouvenin
>>Cc: LAURENT VIVIER; xen-devel@lists.xensource.com; JEAN-PIERRE DION
>>Subject: Re: [Xen-devel] VMX disabled by Feature Control MSR
>>
>>
>>On 14 Jun 2006, at 13:35, Guillaume Thouvenin wrote:
>>
>>    
>>
>>>If the "VMX disabled..." message is displayed, it means that the lock
>>>bit is set to 1. Otherwise we set bit2 to 1. If I try to clear it
>>>      
>>>
>while
>  
>
>>>it is set it causes a general-protection fault. Is it possible to
>>>modify
>>>before Xen switches from real mode to protected mode?
>>>
>>>I will try to modify the arch/x86/boot/x86_64.S
>>>      
>>>
>>No, it's called a lock bit because it is sticky once set. The intention
>>is presumably to allow OEMs an easy way (in their BIOS) to disable VMX
>>on their systems if they don't want to have to support it.
>>
>> -- Keir
>>
>>
>>_______________________________________________
>>Xen-devel mailing list
>>Xen-devel@lists.xensource.com
>>http://lists.xensource.com/xen-devel
>>
>
>
>  
>

-- 
Jean-Pierre DION
Linux and Gnome projects manager
Bull, Architect of an Open World TM 
Tel : +33 (0)4 76 29 72 34
http://www.bull.com
http://www.bullopensource.org
http://gnome.bullfreeware.com/new_index.html


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