[FSL P50x0] KVM HV doesn't work anymore

[Christian Zigotzky]

On 02 June 2021 at 01:26pm, Christian Zigotzky wrote:
> On 20 May 2021 at 01:07am, Nicholas Piggin wrote:
>> Hmm, okay that probably rules out those notifier changes then.
>> Can you remind me were you able to rule these out as suspects?
>>
>> 8f6cc75a97d1 powerpc: move norestart trap flag to bit 0
>> 8dc7f0229b78 powerpc: remove partial register save logic
>> c45ba4f44f6b powerpc: clean up do_page_fault
>> d738ee8d56de powerpc/64e/interrupt: handle bad_page_fault in C
>> ceff77efa4f8 powerpc/64e/interrupt: Use new interrupt context 
>> tracking scheme
>> 097157e16cf8 powerpc/64e/interrupt: reconcile irq soft-mask state in C
>> 3db8aa10de9a powerpc/64e/interrupt: NMI save irq soft-mask state in C
>> 0c2472de23ae powerpc/64e/interrupt: use new interrupt return
>> dc6231821a14 powerpc/interrupt: update common interrupt code for
>> 4228b2c3d20e powerpc/64e/interrupt: always save nvgprs on interrupt
>> 5a5a893c4ad8 powerpc/syscall: switch user_exit_irqoff and 
>> trace_hardirqs_off order
>>
>> Thanks,
>> Nick
> Hi Nick,
>
> I tested these commits above today and all works with -smp 4. [1]
>
> Smp 4 still doesn't work with the RC4 of kernel 5.13 on quad core 
> e5500 CPUs with KVM HV. I use -smp 3 currently.
>
> What shall I test next?
>
> Thanks,
> Christian
>
> [1] https://forum.hyperion-entertainment.com/viewtopic.php?p=53367#p53367
Hi All,

I tested the RC5 of kernel 5.13 today. Unfortunately the KVM HV issue 
still exists.
I also figured out, that '-smp 2' doesn't work either.

Summary:

-smp 1 -> works
-smp 2 -> doesn't work
-smp 3 -> works
-smp 4 -> doesn't work

Cheers,
Christian