Re: Xen 4.2 new features and status -- please help me make a list

[Christoph Egger <Christoph.Egger@amd.com>]

On 09/07/12 16:14, Ian Campbell wrote:

> Hi all,
> 
> I've been trawling the mercurial logs looking for interesting new
> features to update http://wiki.xen.org/wiki/Xen_4.2_Feature_List and
> http://wiki.xen.org/wiki/Xen_Release_Features and have come up with a
> list of interesting things which I need to know more about before I can
> say stuff.
> 
> I've bcc'd people who I think might know about one or more of the
> following. If you do then please can you tell me:
> 
>       * What is the feature, what is the impact for the end user?
>       * What is it's status in 4.2? Is it a proof of concept, an
>         experimental feature, tech preview or a finished completed
>         feature.
>       * Is it new in 4.2? If it isn't new what was it's status in 4.1
>         and 4.0 (i.e. from the list in the previous item).
> 
> Of course if you know of a feature in 4.2 which isn't mentioned but
> which you think is worthwhile please let me know. I'm sure there are
> plenty which I missed.
> 
> Also feel free to edit the wiki instead....
> 
> TIA for your help.
> 
> Ian.
> 
> Nested Virtualisation: Allow HVM guests to use virtualisation hardware
> (e.g. Windows 7 compat mode)
>         Tech Preview, new in 4.2
>         
> vMSI: ? Emulated (or real?) MSIs for guests?
>         State? New in 4.2?
>         
> vMCE: Forward MCE (Machine Check Exceptions) to guests
>         New in 4.2? Preview or complete? I know improvements are pending
>         to migration in 4.3.
>         
> AMD OSVW: What is this?
>         Seems to be new in 4.2?


OSVW (OS Visible Workarounds): Support for guests has been added
to make them disable workarounds for hw bugs not emulated/present
for guests.

Christoph


>         
> xenpaging: Page HVM guest pages to disk
>         Was marked as tech preview in 4.1 and earlier, still is?
>         
> memsharing: Sharing of HVM guest pages.
>         Was marked as tech preview in 4.1 and earlier, still is?
> 
> Intel HLE: What is this?
>         Seems to be new in 4.2?
>         
> Intel TRM: What is this?
>         Seems to be new in 4.2?
> 
> OVMF support for HVM guests.
>         New in 4.2, but disabled by default => Tech preview?
>         
> vPMU: Power Management?
>         New in 4.2?
>         
> ASID support:
>         4.2 gained an option to control this but I think it was
>         pre-existing. When was it first introduced? 4.1 or 4.0 or
>         before?
>         
> Core parking: Offlining CPUs for power reasons?
>         New in 4.2?
>         
> PV netboot: Network boot for PV guests
>         New in 4.2
> 
> 
> 



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