Ping: [PATCH v2 1/2] viridian: remove implicit limit of 64 VPs per partition

[Jan Beulich <jbeulich@xxxxxxxx>]

On 25.01.2021 16:37, Igor Druzhinin wrote:
> On 12/01/2021 04:17, Igor Druzhinin wrote:
>> TLFS 7.8.1 stipulates that "a virtual processor index must be less than
>> the maximum number of virtual processors per partition" that "can be obtained
>> through CPUID leaf 0x40000005". Furthermore, "Requirements for Implementing
>> the Microsoft Hypervisor Interface" defines that starting from Windows Server
>> 2012, which allowed more than 64 CPUs to be brought up, this leaf can now
>> contain a value -1 basically assuming the hypervisor has no restriction while
>> 0 (that we currently expose) means the default restriction is still present.
>>
>> Along with the previous changes exposing ExProcessorMasks this allows a 
>> recent
>> Windows VM with Viridian extension enabled to have more than 64 vCPUs without
>> going into BSOD in some cases.
>>
>> Since we didn't expose the leaf before and to keep CPUID data consistent for
>> incoming streams from previous Xen versions - let's keep it behind an option.
>>
>> Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
>> ---
> 
> ping? Paul?

Paul - I saw a reply by you on patch 2, but not on this one.

libxl maintainers - both patches would want to be acked by you.

Jan