powerpc/64s/exception: shuffle windup code around

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Restore all SPRs and CR up-front, these are longer latency
instructions. Move register restore around to maximise pairs of
adjacent loads (e.g., restore r0 next to r1).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nicholas Piggin 2019-06-28 15:33:26 +10:00 • committed by Michael Ellerman

parent 67d4160a61

commit b113c08341

1 changed files with 16 additions and 24 deletions

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arch/powerpc/kernel/exceptions-64s.S

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