Re: [PATCH v1 0/7] KVM: Hyper-V SynIC timers

2015-12-01 Thread Wanpeng Li
2015-11-26 16:34 GMT+08:00 Andrey Smetanin :
>
>
> On 11/26/2015 08:28 AM, Wanpeng Li wrote:
>>
>> 2015-11-25 23:20 GMT+08:00 Andrey Smetanin :
>>>
>>> Per Hyper-V specification (and as required by Hyper-V-aware guests),
>>> SynIC provides 4 per-vCPU timers.  Each timer is programmed via a pair
>>> of MSRs, and signals expiration by delivering a special format message
>>> to the configured SynIC message slot and triggering the corresponding
>>> synthetic interrupt.
>>
>>
>> Could you post a link for this specification?
>
>
> Official link:
>
> http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.docx
>
> and there is a pdf variant(my own docx -> pdf conversion):
>
> https://www.dropbox.com/s/ehxictr5wgnedq7/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.pdf?dl=0

Btw, is there performance data for such feature?

Regards,
Wanpeng Li
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Re: [PATCH v1 0/7] KVM: Hyper-V SynIC timers

2015-12-01 Thread Denis V. Lunev

On 12/01/2015 01:12 PM, Wanpeng Li wrote:

2015-11-26 16:34 GMT+08:00 Andrey Smetanin :


On 11/26/2015 08:28 AM, Wanpeng Li wrote:

2015-11-25 23:20 GMT+08:00 Andrey Smetanin :

Per Hyper-V specification (and as required by Hyper-V-aware guests),
SynIC provides 4 per-vCPU timers.  Each timer is programmed via a pair
of MSRs, and signals expiration by delivering a special format message
to the configured SynIC message slot and triggering the corresponding
synthetic interrupt.


Could you post a link for this specification?


Official link:

http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.docx

and there is a pdf variant(my own docx -> pdf conversion):

https://www.dropbox.com/s/ehxictr5wgnedq7/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.pdf?dl=0

Btw, is there performance data for such feature?

Regards,
Wanpeng Li

not yet.

This is a requirement for any Hyper-V device emulation
to be activated by Windows. We are going to have
basic infrastructure merged and run performance tests
with all that stuff done.

Den
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Re: [PATCH v1 0/7] KVM: Hyper-V SynIC timers

2015-11-26 Thread Andrey Smetanin



On 11/26/2015 08:28 AM, Wanpeng Li wrote:

2015-11-25 23:20 GMT+08:00 Andrey Smetanin :

Per Hyper-V specification (and as required by Hyper-V-aware guests),
SynIC provides 4 per-vCPU timers.  Each timer is programmed via a pair
of MSRs, and signals expiration by delivering a special format message
to the configured SynIC message slot and triggering the corresponding
synthetic interrupt.


Could you post a link for this specification?


Official link:

http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.docx

and there is a pdf variant(my own docx -> pdf conversion):

https://www.dropbox.com/s/ehxictr5wgnedq7/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.pdf?dl=0



Regards,
Wanpeng Li


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Re: [PATCH v1 0/7] KVM: Hyper-V SynIC timers

2015-11-26 Thread Wanpeng Li
2015-11-26 16:34 GMT+08:00 Andrey Smetanin :
>
>
> On 11/26/2015 08:28 AM, Wanpeng Li wrote:
>>
>> 2015-11-25 23:20 GMT+08:00 Andrey Smetanin :
>>>
>>> Per Hyper-V specification (and as required by Hyper-V-aware guests),
>>> SynIC provides 4 per-vCPU timers.  Each timer is programmed via a pair
>>> of MSRs, and signals expiration by delivering a special format message
>>> to the configured SynIC message slot and triggering the corresponding
>>> synthetic interrupt.
>>
>>
>> Could you post a link for this specification?
>
>
> Official link:
>
> http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.docx
>
> and there is a pdf variant(my own docx -> pdf conversion):
>
> https://www.dropbox.com/s/ehxictr5wgnedq7/Hypervisor%20Top%20Level%20Functional%20Specification%20v4.0.pdf?dl=0

Cool, thanks.

Regards,
Wanpeng Li
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Re: [PATCH v1 0/7] KVM: Hyper-V SynIC timers

2015-11-25 Thread Wanpeng Li
2015-11-25 23:20 GMT+08:00 Andrey Smetanin :
> Per Hyper-V specification (and as required by Hyper-V-aware guests),
> SynIC provides 4 per-vCPU timers.  Each timer is programmed via a pair
> of MSRs, and signals expiration by delivering a special format message
> to the configured SynIC message slot and triggering the corresponding
> synthetic interrupt.

Could you post a link for this specification?

Regards,
Wanpeng Li
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