Re: 2nd round of xen benchmarking

[Brad Spencer <brad%anduin.eldar.org@localhost>]

John Nemeth <jnemeth%cue.bc.ca@localhost> writes:

> On Aug 23, 17:53, Manuel Bouyer wrote:
> } On Wed, Aug 21, 2024 at 04:24:27PM +0200, Manuel Bouyer wrote:

[snip]

>      Is EPT a cpu flag shown by "cpuctl identify", or how do we
> know when a system has it?

This isn't exactly the answer to the general question, but if you have a
DOM0 already you may be able to do this and see if it is available to you:

DOM0# xl dmesg|grep -i ept
(XEN) Intel VT-d Shared EPT tables enabled.
(XEN)  - Extended Page Tables (EPT)
(XEN)  - Virtualisation Exceptions
(XEN) VMX: Disabling executable EPT superpages due to CVE-2018-12207


I would also add that I think HAP (Hardware assisted paging) support and
probably IOMMU helps with HVM and PVH guests.  You can see those in "xl
dmesg" as well.






-- 
Brad Spencer - brad%anduin.eldar.org@localhost - KC8VKS - http://anduin.eldar.org