[Bug 195819] TSC calibration can hang FreeBSD in Hyper-V Generation 2 VM

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195819

--- Comment #24 from Dexuan Cui <decui at microsoft.com> ---
(In reply to Dexuan Cui from comment #22)
The TSC calibration issue was fixed in Apr:
https://github.com/freebsd/freebsd/commit/cff47489671a6ec6470f706f530df99c158511b0
and the fix was merged into 10.3, stable/11 and 12.-CURRENT.

but unluckily today I found the I couldn't boot UEFI VM (i.e. Hyper-V
Generation-2 VM) with the 10.3 uefi iso  and 11-beta1  iso. :-(

The symptom is the same (it looks the kernel crashes at the very early point
where the uefi fb driver fails to load?). I'll report a new bug.

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