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non maskable interrupt reentrancy fixes for OPAL

Nicholas Piggin linuxppc-dev 1 version In review

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  1. v1 Latest2 patches 1 replyIn review

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#Subject and filesSizeRepliesApplied
1/2powerpc/64s: Fix FIXUP_ENDIAN non-maskable interrupt reentrancyarch/powerpc/boot/ppc_asm.h arch/powerpc/include/asm/ppc_asm.h+14 -91 reply
2/2powerpc/64s: Fix OPAL_CALL non-maskable interrupt reentrancyarch/powerpc/platforms/powernv/opal-wrappers.S+3 -30 replies

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Cover letter [PATCH 0/2] non maskable interrupt reentrancy fixes for OPAL

Hi,

These fixes are more minimal, and split up properly since last post. Also accounted for Ben's comment of using HSRRs rather than disabling RI for OPAL_CALL.

This will still increase cost of opal calls a bit due to new mtmsr in FIXUP_ENDIAN return.

I have a few more patches that reduce overhead quite a bit, but they won't be suitable for 4.12, so I'll send those out after merge window.

Thanks,
Nick

Nicholas Piggin (2):
powerpc/64s: Fix FIXUP_ENDIAN non-maskable interrupt reentrancy powerpc/64s: Fix OPAL_CALL non-maskable interrupt reentrancy

 arch/powerpc/boot/ppc_asm.h                    | 12 +++++++-----
 arch/powerpc/include/asm/ppc_asm.h             | 11 +++++++----
 arch/powerpc/platforms/powernv/opal-wrappers.S |  6 +++---
 3 files changed, 17 insertions(+), 12 deletions(-)
Signature · 1 line
2.11.0

Read the cover letter in its thread