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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Mon, 7 May 2018 18:57:58 +0200
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Subject: Re: [Qemu-devel] [PATCH v5 0/1] i386/kvm: TSC page clocksource for
 Hyper-V-on-KVM fixes
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To: Vitaly Kuznetsov <vkuznets@redhat.com>, qemu-devel@nongnu.org
Cc: Richard Henderson <rth@twiddle.net>, Eduardo Habkost <ehabkost@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Roman Kagan <rkagan@virtuozzo.com>

On 02/05/2018 09:34, Vitaly Kuznetsov wrote:
> Vitaly Kuznetsov <vkuznets@redhat.com> 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