RE: [PATCH] arm64: hyperv: make the format of 'Hyper-V: Host Build' output match x86

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"Michael Kelley (LINUX)" <mikelley@xxxxxxxxxxxxx> writes:

> From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> Sent: Friday, March 4, 2022 4:24 AM
>> 
>> Currently, the following is observed on Hyper-V/ARM:
>> 
>>  Hyper-V: Host Build 10.0.22477.1061-1-0
>> 
>> This differs from similar output on x86:
>> 
>>  Hyper-V Host Build:20348-10.0-1-0.1138
>> 
>> and this is inconvenient. As x86 was the first to introduce the current
>> format and to not break existing tools parsing it, change the format on
>> ARM to match.
>
> Interesting.  I had explicitly output this line differently on ARM64 so
> that the output is in the standard form of a Windows version number,
> which is what the Host Build value actually is.  My intent is to fix the
> x86 side as well.  I had not anticipated there being automated parsing
> of these strings.
>
> I had also put the colon in the place to be consistent with most
> other Hyper-V messages.  I know:  picky, picky. :-)
>
> What's the impact of changing the tools that parse it so that
> either version could be handled?

I wish we knew what tools are out there parsing this line :-) The issue
got reported by QA as 'inconsistency'.

As the format of this string was never promissed to be an ABI I think we
can go the other way around: change x86 to match ARM. Some scripts may
need fixing but IMO this is acceptable. Let's just promiss to not change
it in the future :-)

-- 
Vitaly




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