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Re: [Xen-devel] [PATCH v3 2/4] x86: possibly bring up all CPUs even if not all are supposed to be used

On 07/19/2018 11:32 AM, Jan Beulich wrote:
> Note: On one of my test systems the parked CPUs get _PSD data reported
>       by Dom0 that is different from the non-parked ones (coord_type is
>       0xFC instead of 0xFE). Giving Dom0 enough vCPU-s eliminates this
>       problem, so there is apparently something amiss in the processor
>       driver. I've tried to figure out what, but I couldn't, despite the
>       AML suggesting that this might be some _OSC invocation (but if it
>       is, I can't find it - acpi_run_osc() clearly does not anywhere get
>       invoked in a per-CPU fashion).

Regarding your second note, could the commit below (in the linux acpi processor
driver) help/fixes it?

4d0f1ce69559 xen/acpi: upload _PSD info for non Dom0 CPUs too

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