On 26/10/2021 16:12, Roger Pau Monne wrote:
> Always allow the HPET to be setup, but don't report a frequency back
> to the platform time source probe in order to avoid it from being
> selected as a valid timer if it's not usable.
>
> Doing the setup even when not intended to be used as a platform timer
> is required so that is can be used in legacy replacement mode in order
> to assert the IO-APIC is capable of receiving interrupts.
>
> Fixes: c12731493a ('x86/hpet: Use another crystalball to evaluate HPET 
> usability')
> Reported-by: Andrew Cooper <andrew.coop...@citrix.com>
> Signed-off-by: Roger Pau Monné <roger....@citrix.com>

Yup - does fix the regression.

Acked-by: Andrew Cooper <andrew.coop...@citrix.com>
Tested-by: Andrew Cooper <andrew.coop...@citrix.com>

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