powerpc/rtas: various cleanups and improvements

I had a bunch of random little fixes and cleanups around and was prompted to put them together and make a change to call RTAS with MSR[RI] enabled because of a report of the hard lockup watchdog NMI IPI hitting in an rtas call which then crashed because it's unrecoverable.

Could possibly move patch 9 earlier if it would help with backporting.

Thanks,
Nick

Nicholas Piggin (14):
powerpc/rtas: Move rtas entry assembly into its own file powerpc/rtas: Make enter_rtas a nokprobe symbol on 64-bit powerpc/rtas: Fix whitespace in rtas_entry.S powerpc/rtas: Call enter_rtas with MSR[EE] disabled powerpc/rtas: Modernise RI clearing on 64-bit powerpc/rtas: Load rtas entry MSR explicitly powerpc/rtas: PACA can be restored directly from SPRG powerpc/rtas: call enter_rtas in real-mode on 64-bit powerpc/rtas: Leave MSR[RI] enabled over RTAS call powerpc/rtas: replace rtas_call_unlocked with raw_rtas_call powerpc/rtas: tidy __fetch_rtas_last_error powerpc/rtas: Close theoretical memory leak powerpc/rtas: enture rtas_call is called with MMU enabled powerpc/rtas: Consolidate and improve checking for rtas callers

 arch/powerpc/include/asm/rtas.h              |   4 +-
 arch/powerpc/kernel/Makefile                 |   2 +-
 arch/powerpc/kernel/entry_32.S               |  49 ------
 arch/powerpc/kernel/entry_64.S               | 150 -------------------
 arch/powerpc/kernel/rtas.c                   | 132 +++++++++-------
 arch/powerpc/kernel/rtas_entry.S             | 144 ++++++++++++++++++
 arch/powerpc/platforms/pseries/hotplug-cpu.c |   2 +-
 arch/powerpc/platforms/pseries/ras.c         |   7 +-
 arch/powerpc/xmon/xmon.c                     |   2 +-
 9 files changed, 227 insertions(+), 265 deletions(-)
 create mode 100644 arch/powerpc/kernel/rtas_entry.S

2.23.0