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powerpc/kuap: Use MMU_FTR_KUAP on all and refactor disabling kuap

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All but book3s/64 use a static branch key for disabling kuap.
book3s/64 uses an mmu feature.

Refactor all targets to use MMU_FTR_KUAP like book3s/64.

For PPC32 that implies updating mmu features fixups once KUAP
has been initialised.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/6b3d7c977bad73378ea368bc6818e9c94ea95ab0.1689091022.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2023-07-11 17:59:18 +02:00 • committed by Michael Ellerman
commit 26e0412082
9 changed files with 19 additions and 40 deletions
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