powerpc/book3e: Activate KUEP at all time

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On book3e,
- When using 64 bits PTE: User pages don't have the SX bit defined
so KUEP is always active.
- When using 32 bits PTE: Implement KUEP by clearing SX bit during
TLB miss for user pages. The impact is minimal and worth neither
boot time nor build time selection.

Activate it at all time.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e376b114283fb94504e2aa2de846780063252cde.1634627931.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2021-10-19 09:29:15 +02:00 • committed by Michael Ellerman

parent ee2631603f

commit dc3a0e5b83

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1

arch/powerpc/kernel/head_fsl_booke.S

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2

arch/powerpc/platforms/Kconfig.cputype

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