Re: [Xen-devel] [PATCH] hvmloader: Drop use of XENVER_extraversion

[Jan Beulich <jbeulich@xxxxxxxx>]

On 11.02.2020 15:08, Andrew Cooper wrote:
> The printf() in init_hypercalls() only ends up in the hypervisor console log,
> so extraversion really isn't interesting.
> 
> The SMBios table doesn't need extraversion, and removing it reduces the
> ability for a guest to fingerprint the exact hypervisor it is running under.

While I'm not entirely opposed, let's compare with bare hardware's
BIOSes / SMBIOS tables: Don't you see, just like I do, typically
very detailed BIOS etc version information (sometimes including
even something like build numbers) there? I can accept that excess
data in extraversion may go too far, but the minor version number
we put there by default is hardly of any concern, and may end up
being useful. The one argument against its usefulness is that it's
generally string of no-where standardized contents.

Personally I like Sergey's approach better, but I realize you
dislike it to a degree that, as it seems, you're not even willing
to have a reasonable dispute over it.

Jan

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