powerpc/security: Allow for processors that flush the link stack using the special bcctr

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If both count cache and link stack are to be flushed, and can be flushed
with the special bcctr, patch that in directly to the flush/branch nop
site.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200609070610.846703-7-npiggin@gmail.com

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Nicholas Piggin 2020-06-09 17:06:09 +10:00 • committed by Michael Ellerman

parent 70d7cdaf05

commit 4d24e21cc6

2 changed files with 21 additions and 8 deletions

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2

arch/powerpc/include/asm/security_features.h

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23

arch/powerpc/kernel/security.c

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