powerpc/rtas: PACA can be restored directly from SPRG

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On 64-bit, PACA is saved in a SPRG so it does not need to be saved on
stack. We also don't need to mask off the top bits for real mode
addresses because the architecture does this for us.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220308135047.478297-8-npiggin@gmail.com

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Nicholas Piggin 2022-03-08 23:50:40 +10:00 • committed by Michael Ellerman

parent c5a65e0a42

commit 5c86bd02b3

1 changed files with 4 additions and 9 deletions

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arch/powerpc/kernel/rtas_entry.S

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