Hi,
I didn't get any objections to the approach proposed in my
earlier RFC, so I've gone ahead with R12 = (CR | trap #) approach.
It avoided an extra register save with HV and the PR handler ended
up not being too bad.
This passed KVM boot testing with 64-bit HV and PR, with the (host)
kernel running at non-0. Without these patches, the same configuration
crashes immediately.
Thanks,
Nick
Nicholas Piggin (3):
KVM: PPC: Book3S: Change interrupt call to reduce scratch space use on
HV
KVM: PPC: Book3S: Move 64-bit KVM interrupt handler out from alt
section
KVM: PPC: Book3S: 64-bit CONFIG_RELOCATABLE support for interrupts
arch/powerpc/include/asm/exception-64s.h | 67 +++++++++++++++++++++++++-------
arch/powerpc/include/asm/head-64.h | 2 +-
arch/powerpc/kernel/exceptions-64s.S | 10 ++---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 19 +++++----
arch/powerpc/kvm/book3s_segment.S | 32 +++++++++++----
5 files changed, 94 insertions(+), 36 deletions(-)
--
2.10.2
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