Re: [Xen-users] Pacifica/VT again

M.A. Williamson
Mon, 21 Nov 2005 22:57:46 -0000

>Are you meaning a x86 XenU on a x86_64 host system?

An _unmodified_ x86 domU on an x86_64 host.

64 bit Xen doesn''t support the 32-bit Xen interface, so explicitly
Xen-native 32-bit guests can''t run on it even though fully-virtualised
unmodified guests can. i.e.:

32-bit host: 32-bit Xen-native guests 32-bit host w/VT or w/Pacifica:
32-bit Xen-native guests, 32-bit unmodified guests 64-bit host: 64-bit
Xen-native guests 64-bit host w/VT or w/Pacifica: 64-bit Xen-native guests,
64 or 32 bit unmodified guests

Cheers,
Mark

>
>Regards,
>
>Matthijs ter Woord
>
>
>
>
>----- Original Message -----
>From: "Anthony Liguori" <aliguori@us.ibm.com>
>To: "Matthijs ter Woord" <matthijsterwoord@gmail.com>
>Cc: <xen-users@lists.xensource.com>
>Sent: Monday, November 21, 2005 3:46 PM
>Subject: Re: [Xen-users] Pacifica/VT again
>
>
>> Matthijs ter Woord wrote:
>>
>> > Hi,
>> >
>> > Some time ago i asked a question about the Pacifica/VT features.
I''ve
>> > been thinking about it some more now.
>> >
>> > What i would want is to run the host system using a x86_64 (ie.
AMD64)
>> > platform and then run native 32-bit platforms as guests (windows).
>> > AFAIK this should be possible as AMD64 is just an extension to the
x86
>> > features of a CPU.
>> >
>> > Does anyone has comments about this?
>>
>> This already works with the Xen''s VT support I believe.
>>
>> Regards,
>>
>> Anthony LIguori
>>
>> >
>> > Regards,
>> >
>> > Matthijs ter Woord
>> >
>> >
>> >
>>
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