powerpc/security: Add a security feature for STF barrier
authorNicholas Piggin <npiggin@gmail.com>
Mon, 3 May 2021 13:02:41 +0000 (23:02 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Mon, 21 Jun 2021 11:13:19 +0000 (21:13 +1000)
commit84ed26fd00c514da57cd46aa3728a48f1f9b35cd
treec57be6639b730d5a84d556460bc92319e1085816
parent65c7d070850e109a8a75a431f5a7f6eb4c007b77
powerpc/security: Add a security feature for STF barrier

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
arch/powerpc/include/asm/security_features.h
arch/powerpc/kernel/security.c