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/[email protected]/#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 <[email protected]>
Many thanks for your help,
Christian
[1] https://github.com/chzigotzky/kernels/releases/tag/v7.3.0-rc5-2
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