Re: [Qemu-devel] [PATCH v5 0/1] i386/kvm: TSC page clocksource for Hyper-V-on-KVM fixes

[Paolo Bonzini]

On 02/05/2018 09:34, Vitaly Kuznetsov wrote:
> Vitaly Kuznetsov <address@hidden> writes:
> 
>> Changes since v4:
>> - Rebase on top of Roman's patches.
>> - Drop PATCH2 as it is no longer needed (after adding explicit
>>   hv_frequencies).
>>
>> Previously, Ladi was working on enabling TSC page clocksource for nested
>> Hyper-V-on-KVM workloads. He found out that if Hyper-V frequency MSRs are
>> exposed to L1 as well as INVTSC flag Hyper-V enables TSC page clocksource
>> to its guests. Qemu doesn't pass INVTSC by default as it is a migration
>> blocker.
>>
>> I found out there's a different way to make Hyper-V like us: expose
>> Reenlightenment MSRs to it. KVM doesn't fully support the feature as
>> we're still unable to migrate nested environments but rudimentary support
>> we have there is enough.
>>
>> Enable Hyper-V reenlightenment MSRs to make things work.
>>
> 
> Gentle ping :-)
> 
> With Roman's Reviewed-by:, is there anything else needed from me to get
> this accepted?
> 
> Thanks!
> 

Queued, thanks.

Paolo