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

To: "Nicholas Lee" <emptysands@xxxxxxxxx>
Subject: RE: [Xen-users] Athlon X2 (Windsor) works with HVM
From: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Date: Fri, 15 Sep 2006 12:28:07 +0200
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Thread-topic: [Xen-users] Athlon X2 (Windsor) works with HVM

From: Nicholas Lee [mailto:emptysands@xxxxxxxxx]
Sent: 14 September 2006 22:00
To: Petersson, Mats
Cc: xen ml
Subject: Re: [Xen-users] Athlon X2 (Windsor) works with HVM

I understand what you are saying about the AM2 socket and AMD-V. Regardless because of previous product on the market I still found it difficult when putting a system together to make sure I had the right processor.

The only way I could be sure I was right, was making the model (ADO...) of the processor against the list on wikipedia.  Descriptions of processors sometimes aren't sufficently clear on webstores. 
Agreed. Unfortunately, it's hard to satisfy all aspects of marketing, technical descriptions, etc, etc. It would be confusing to a lot of people if we (AMD) started using different product names and/or numbering for processors that for all intents and purposes (besided virtualization) are equal. Then we'd get LOTS of calls to the tech-supprot asking if the new Super-Athlon64 4000+ X2 would run the same software as the older Athlon64 4000+ X2... We don't really need that... ;-)
It should be clear from the Webstore which socket the processor applies to, even if they don't supply any further information at all...

On 9/13/06, Petersson, Mats <Mats.Petersson@xxxxxxx> wrote:
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.

Can you also clarify for me that support for AMD-V is independent of chipset. ie. Any system with a AMD-V processor will do HVM.

Given Intel seem to have only one desktop chipset that supports VT, might be an interest point of difference for marketing. 
Yes, AMD's processors have full support for AMD-V inside the processor, and chipset choice will make absolutely no difference to availability of the AMD-V features. I suspect somehow that the reason Intel requires certain chipsets for the VT functionality is that there is interaction between the memory controller and the VT functionality - but I don't know this, I'm just gueesing - there is however little OTHER reason for this to be the case...


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