Re: [PATCH v4 0/1] hw/hyperv/vmbus: Is it maintained?

[Jon Doron <arilou@gmail.com>]

On 13/11/2021, Maciej S. Szmigiero wrote:
>On 12.11.2021 21:39, Roman Kagan wrote:
>>On Fri, Nov 12, 2021 at 09:32:31PM +0300, Vladimir Sementsov-Ogievskiy wrote:
>>>Add Den and Roman (his new address)
>>
>>Thanks, I missed it on the list indeed.
>>
>>>06.11.2021 16:41, Philippe Mathieu-Daudé wrote:
>>>>This is the 4th time I send this patch. Is the VMBus infrastructure
>>>>used / maintained? Should we deprecate & remove?
>>
>>I think it's fair to say it's not maintained.  The whole
>>hw/hyperv/vmbus.c was submitted as a part of the work by Jon to enable
>>some obscure windows debugging feature which only worked in presence of
>>VMBus.  It was mostly taken from the respective branch of the (now
>>effectively abandoned) downstream tree with an implementation of the
>>core VMBus infrastructure and the devices using it; however, none of the
>>actual VMBus devices ever made it into the mainline tree.
>>
>
>The VMBus code works fine, is mostly self-contained and by being a part
>of the upstream QEMU it does benefit from any improvements done there and
>so it is much less likely to bit-rot with time.
>
>I am still committed to upstreaming a Hyper-V Dynamic Memory Protocol
>driver (which uses VMBus), however had been preempted by higher-priority
>work for now.
>
>Thanks,
>Maciej

Hi guys,

Sorry for the late reply, like Roman I also never got to submit the RFC 
for the Synth debugger device which requires the VMBus, I do hope to get 
to it at some point and VMBus is a required part for it.

In the last year or so I have not had much time to spend on this but I 
do hope to get back to finishing what I have started.

I'm not really sure I have the time or knowledge to maintain VMBus :( 
but I'll do my best to answer any questions as well.

-- Jon.