powerpc/64s/idle: avoid POWER9 DD1 and DD2.0 PMU workaround on DD2.1

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DD2.1 does not have to save MMCR0 for all state-loss idle states,
only after deep idle states (like other PMU registers).

Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nicholas Piggin 2017-11-03 15:13:21 +11:00 • committed by Michael Ellerman

parent 9d2f510a66

commit e3646330cf

1 changed files with 19 additions and 12 deletions

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arch/powerpc/kernel/idle_book3s.S

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