Re: [Xen-devel] HPET enabled in BIOS, not presented as available_clocksource -- config, kernel code, &/or BIOS?

From: Andrew Cooper
Date: Sat May 13 2017 - 16:16:30 EST


On 13/05/2017 21:05, PGNet Dev wrote:
> On 5/13/17 12:59 PM, Andrew Cooper wrote:
>> Ok. Lack of a clocksource is to be expected.
>>
>> The reason why the HPETs are unavailable is that dom0 is not a position
>> to program them; dom0 doesn't know what Xen has set up in the IDT.
>>
>> Use `xl dmesg` to get to the hypervisor dmesg log. You should see
>> mention of the HPET in there if Xen has found it.
>
> back to the error at hand ...
>
> xl dmesg | grep -i hpet
> [ 1.365876] hpet_acpi_add: no address or irqs in _CRS
> [ 1.365876] hpet_acpi_add: no address or irqs in _CRS
>
> again, only present when booting with Xen.
>
> same kernel, no Xen, no such error.

We don't have code like that in upstream Xen. No function with that
name, or a string which looks like that error message.

http://marc.info/?l=linux-kernel&m=149464267427111&w=2 indicates that
you are using a SuSE hypervisor.

Jan/Juergen: Any ideas? This looks as if it is something local to your
patch queue.

~Andrew