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RE: [Xen-users] Athlon X2 (Windsor) works with HVM

To: "Nicholas Lee" <emptysands@xxxxxxxxx>, "xen ml" <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Athlon X2 (Windsor) works with HVM
From: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Date: Wed, 13 Sep 2006 12:11:25 +0200
Delivery-date: Wed, 13 Sep 2006 03:12:29 -0700
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Thread-topic: [Xen-users] Athlon X2 (Windsor) works with HVM

From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Nicholas Lee
Sent: 13 September 2006 10:29
To: xen ml
Subject: [Xen-users] Athlon X2 (Windsor) works with HVM

Just to note, I was going to get an Ultra 20 M2 but the lead time of delivery was too long. So I put together a quick Athlon X2 (Windsor) with a Gigabyte NForce 590SLI motherboard.

I did a quick test with Xenoppix [1] (Knoppix and Xen) and HVM worked like charm. This runs Knoppix in a HVM domain.

I'll be doing some further testing with Windows once I've installed everything.

Note its important that if you get an Athlon that you check the model. Only the Windsor (dual core) and Orleans (not dual core) do AMD-V. It can be very confusing with the AMD ratings and the GHz ratings.  
Whilst it may be confusing when you look at the model numbers for the processor, it is very easy to tell from the Socket which works with AMD-V and which doesn't. All Socket AM2 processors except Sempron has AMD-V. Another universal key is that any processor that uses DDR2 (again, except Sempron) has AMD-V. This is of course the same thing as the socket key, since they are tied together - the new socket is introduced to match the DDR2 memory interface [or at least, there are different sockets for the different types of memory controller].
Similarly, the new Opteron product has a new socket (Socket F) and DDR2 memory controller, and has AMD-V.
Mobile product is the only one available as X2 (Dual Core), and again DDR2 is a key to AMD-V.
So in summary: Any AMD processort (except Sempron) that uses DDR2 memory will have AMD-V.
Note that although the AMD-V technology is in the same product that introduces DDR2, there's no tie between the two other than the fact that they are introduced in the same product version.
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