powerpc/64s: Allow control of RFI flush via debugfs

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commit 236003e6b5 upstream.

Expose the state of the RFI flush (enabled/disabled) via debugfs, and
allow it to be enabled/disabled at runtime.

eg: $ cat /sys/kernel/debug/powerpc/rfi_flush
    1
    $ echo 0 > /sys/kernel/debug/powerpc/rfi_flush
    $ cat /sys/kernel/debug/powerpc/rfi_flush
    0

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Michael Ellerman 2018-01-16 22:17:18 +11:00 • committed by Greg Kroah-Hartman

parent 517bdccc3a

commit d6eded6c94

1 changed files with 30 additions and 0 deletions

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arch/powerpc/kernel/setup_64.c

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