WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] Re: [Xen-devel] VMX Hardware

Keir Fraser wrote:


On 14 Aug 2005, at 13:23, Mogens Valentin wrote:

I assume by VMX, you're talking about cpu/hardware with HW-support for virtualisation, i.e. Intels Vanderbilt Technology (VT) and AMD' Pacifica. If so, it's clear to me that AMD will be leading, because of it's onchip memory controller, and hence reduced needs for software support to do the page switching, for which Intel needs quite a lot of software to emulate.


Not sure what you mean. Both technologies require the hypervisor to maintain shadow page tables.

The Pacifica spec does mention optional hardware support for "Nested Page Tables" which is essentially hardware shadow page tables.

Should be interesting to see the performance difference between software/hardware shadow page tables.

It's worth noting that AMD has just released a simulator for (SimNow) that has virtualization support. Perhaps one of the AMD guys on the list can confirm whether SimNow has enough Pacifica support for Xen development?

Regards,

Anthony Liguori


 -- Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>