Re: [Xen-devel] [BUG] panic: "IO-APIC + timer doesn't work" - several people have reproduced

[Jan Beulich <jbeulich@xxxxxxxx>]

On 17.03.2020 15:08, Jan Beulich wrote:
> On 17.03.2020 14:48, Jason Andryuk wrote:
>> I got it to boot past "IO-APIC + timer doesn't work".  I programmed
>> the HPET to provide a periodic timer in hpet_resume() on T0.  When I
>> actually got it programmed properly, it worked to increment
>> pit0_ticks.  I also made timer_interrupt() unconditionally
>> pit0_ticks++ though that may not matter.
> 
> Hmm, at the first glance I would imply the system gets handed to Xen
> with a HPET state that we don't (and probably also shouldn't) expect.
> Could you provide HPET_CFG as well as all HPET_Tn_CFG and
> HPET_Tn_ROUTE values as hpet_resume() finds them before doing any
> adjustments to them? What are the components / parties involved in
> getting Xen loaded and started?

Of course much depends on what exactly you mean you've done to
the HPET by saying "I programmed the HPET to provide ...".

Jan

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