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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.09.12 at 17:39, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Fri, 2012-09-07 at 16:22 +0100, Jan Beulich wrote:
>> >>> On 07.09.12 at 16:14, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
>> > vMSI: ? Emulated (or real?) MSIs for guests?
>> >         State? New in 4.2?
>> 
>> Not sure what you're referring to here. There certainly was a
>> xen/arch/x86/hvm/vmsi.c in 4.1 already.
> 
> OK, thanks. 4.0 too by the looks of it.
> 
> What exactly is this? Is it about injection of MSIs from real
> (passthrough) hardware devices to guests (only HVM ones?) or is about
> MSIs generated by emulated devices (or both)?

I don't think emulated devices genera MSIs, so to me this is
just for passthrough. But I may be wrong.

>> > vPMU: Power Management?
>> >         New in 4.2?
>> 
>> Enhanced iirc.
> 
> But already a full feature in 4.1 and 4.0?
> 
> This lets HVM guests thing they have power management hardware, and
> tickling it does what?

Oh, I didn't pay close enough attention - PM stands for
Performance Monitor here. Iirc e.g. Fujitsu have been using
this even in 4.0 already.

Jan


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