[PATCH 00/14] powerpc/rtas: various cleanups and improvements
Laurent Dufour
ldufour at linux.ibm.com
Thu Mar 17 22:15:21 AEDT 2022
Hi Nick,
As this series needs additional work, I just sent a single patch [1] fixing
the MSR[RI] issue addressed in the patch 9/14 of this series.
I did that because that fix is fixing a panic currently seen and this will
ease backport to stable and distro kernel.
I suggest rebasing this series on top of this new patch.
Cheers,
Laurent.
1:
https://lore.kernel.org/linuxppc-dev/20220317110601.86917-1-ldufour@linux.ibm.com/
On 08/03/2022, 14:50:33, Nicholas Piggin wrote:
> 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
>
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