Re: [PATCH v8 00/16] acquire_resource size and external IPT monitoring

[Oleksandr <olekstysh@xxxxxxxxx>]

On 01.02.21 15:07, Andrew Cooper wrote:

Hi Andrew

> On 01/02/2021 12:34, Oleksandr wrote:
> > On 30.01.21 04:58, Andrew Cooper wrote:
> >
> > Hi Andrew
> >
> > > Combined series (as they are dependent).  First, the resource size
> > > fixes, and
> > > then the external IPT monitoring built on top.
> > >
> > > Posting in full for reference, but several patches are ready to go
> > > in.  Those
> > > in need of review are patch 6, 8 and 12.
> > >
> > > See individual patches for changes.  The major work was rebasing over
> > > the
> > > ARM/IOREQ series which moved a load of code which this series was
> > > bugfixing.
> > Looks like that some of these patches have been already merged. So I
> > preliminary tested current staging
> > (9dc687f155a57216b83b17f9cde55dd43e06b0cd x86/debug: fix page-overflow
> > bug in dbg_rw_guest_mem) on Arm *with* IOREQ enabled.
> >
> > I didn't notice any regressions with IOREQ on Arm))
> Fantastic!
>
> Tamas and I did do extended testing on the subset which got committed,
> before it went in, and it is all fixing of corner cases, rather than
> fundamentally changing how things worked.
>
>
> One query I did leave on IRC, and hasn't had an answer.
>
> What is the maximum number of vcpus in an ARM guest?
public/arch-arm.h says that current supported guest VCPUs max number is 
128.

> You moved an
> x86-ism "max 128 vcpus" into common code.
Ooh, I am not sure I understand where exactly. Could you please clarify 
in which patch?

> ~Andrew
--
Regards,

Oleksandr Tyshchenko