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

  • To: Oleksandr <olekstysh@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Mon, 1 Feb 2021 13:07:04 +0000
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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))


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?  You moved an
x86-ism "max 128 vcpus" into common code.




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