From mboxrd@z Thu Jan  1 00:00:00 1970
From: Juergen Gross <jgross@suse.com>
Subject: Re: PV-vNUMA issue: topology is misinterpreted by the
 guest
Date: Mon, 27 Jul 2015 06:24:35 +0200
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To: Boris Ostrovsky <boris.ostrovsky@oracle.com>, Dario Faggioli <dario.faggioli@citrix.com>
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On 07/24/2015 06:40 PM, Boris Ostrovsky wrote:
> On 07/24/2015 12:10 PM, Juergen Gross wrote:
>>
>> If we can fiddle with the masks on boot, we could do it in a running
>> system, too. Another advantage with not relying on cpuid. :-)
>
>
> I am trying to catch up with this thread so I may have missed it, but I
> still don't understand why we don't want to rely on CPUID.
>
> I think I saw Juergen said --- because it's HW-specific. But what's
> wrong with that? Hypervisor is building virtualized x86 (in this case)
> hardware and on such HW CPUID is the standard way of determining
> thread/core topology. Plus various ACPI tables and such.

I didn't mean specific to x86, but even different between AMD and Intel.


Juergen