Re: [PATCH 0/2] KVM: PPC: BookE: Fix boot hang on preemptible kernels

[Christian Zigotzky]

On 29/09/26 17:51, Christian Zigotzky wrote:
> On 28/09/26 13:04, Shrikanth Hegde wrote:
> > Christian Zigotzky had reported that preemptible kernels don't boot on
> > his FSL Cyrus+ board. The board freezes on running either full/lazy
> > preemption and has been an issue for a while now.
> >
> > https://lore.kernel.org/all/b897b0fd-90f2-4215-bcd4-3714e497d773@xxxxxxxxxxx/#t 
> >
> >
> > After 7.0, there is only preempt=full/lazy which removed the
> > preempt=none/voluntary workaround used to mask the issue. There was
> > challenge is getting the console logs which made the fixes difficult 
> > since
> > one couldn't know where the issue is.
> >
> > Thanks to Michal for helping in getting the logs. That pointed at few
> > places where the issue could be. This series is an attempt at fixing
> > those.
> >
> > Christian, KVM team,
> > Please *test* the patches.
> >
> > Shrikanth Hegde (2):
> >    KVM: PPC: BookE: Disable preemption before loading guest FP and
> >      Altivec
> >    KVM: PPC: Replay pending interrupts before entering the guest
> >
> >   arch/powerpc/kvm/booke.c   |  9 ++++++++-
> >   arch/powerpc/kvm/powerpc.c | 13 +++++++++++++
> >   2 files changed, 21 insertions(+), 1 deletion(-)
> Hi,
>
> I was able to compile the RC5 of kernel 7.3 with your patches today. 
> :-) [1]
>
> After that I successfully tested it with KVM PR and KVM HV on my 
> PowerPC machines.
>
> Tested-by: Christian Zigotzky <chzigotzky@xxxxxxxxxxx>
>
> Many thanks for your help,
>
> Christian
>
>
> [1] https://github.com/chzigotzky/kernels/releases/tag/v7.3.0-rc5-2
Hi,

is it possible to add these patches to the kernel 7.4?

Thanks,
Christian

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