[PATCH 0/8] powerpc: fast interrupt exit bug and misc fixes

Nicholas Piggin npiggin at gmail.com
Mon Jun 28 17:49:24 AEST 2021


This is a bunch of fixes for powerpc next, mostly a nasty hole in fast
interrupt exit code found by Sachin and some other bits along the way
while looking at it.

So far this survives about 5 hours of stress testing with a workload
that would trigger it in a few seconds (guest 128 vcpus running kernel
compile loops with perf record -ag running in the background).

Thanks,
Nick

Nicholas Piggin (8):
  powerpc/64e: fix CONFIG_RELOCATABLE build
  powerpc/64e: remove implicit soft-masking and interrupt exit restart
    logic
  powerpc/64s: add a table of implicit soft-masked addresses
  powerpc/64s/interrupt: preserve regs->softe for NMI interrupts
  powerpc/64: enable MSR[EE] in irq replay pt_regs
  powerpc/64/interrupts: add missing kprobe annotations on interrupt
    exit symbols
  powerpc/64s/interrupt: clean up interrupt return labels
  powerpc/64s: move ret_from_fork etc above __end_soft_masked

 arch/powerpc/include/asm/interrupt.h | 41 ++++++++++---
 arch/powerpc/include/asm/ppc_asm.h   |  7 +++
 arch/powerpc/kernel/exceptions-64e.S | 23 +++----
 arch/powerpc/kernel/exceptions-64s.S | 55 ++++++++++++++---
 arch/powerpc/kernel/interrupt_64.S   | 90 ++++++++++++++++++----------
 arch/powerpc/kernel/irq.c            |  1 +
 arch/powerpc/kernel/vmlinux.lds.S    |  9 +++
 arch/powerpc/lib/restart_table.c     | 26 ++++++++
 8 files changed, 194 insertions(+), 58 deletions(-)

-- 
2.23.0



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