powerpc/security: Add a security feature for STF barrier

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Rather than tying this mitigation to RFI L1D flush requirement, add a
new bit for it.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210503130243.891868-3-npiggin@gmail.com

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Nicholas Piggin 2021-05-03 23:02:41 +10:00 • committed by Michael Ellerman

parent 65c7d07085

commit 84ed26fd00

2 changed files with 6 additions and 5 deletions

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4

arch/powerpc/include/asm/security_features.h

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7

arch/powerpc/kernel/security.c

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