tree 9bef6af7bd651cff92484097cbc43cebbeee253a
parent fd6e440f20b1a4304553775fc55938848ff617c9
author Michael Ellerman <mpe@ellerman.id.au> 1516101438 +1100
committer Michael Ellerman <mpe@ellerman.id.au> 1516192221 +1100

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

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>