powerpc/8xx: Allow STRICT_KERNEL_RwX with pinned TLB

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Pinned TLB are 8M. Now that there is no strict boundary anymore
between text and RO data, it is possible to use 8M pinned executable
TLB that covers both text and RO data.

When PIN_TLB_DATA or PIN_TLB_TEXT is selected, enforce 8M RW data
alignment and allow STRICT_KERNEL_RWX.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c535fc97bf0dd8693192e25feeed8088701e00c6.1589866984.git.christophe.leroy@csgroup.eu

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This commit is contained in:

Christophe Leroy 2020-05-19 05:49:25 +00:00 • committed by Michael Ellerman

parent cf209951fa

commit da1adea075

3 changed files with 13 additions and 6 deletions

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8

arch/powerpc/Kconfig

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9

arch/powerpc/mm/nohash/8xx.c

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2

arch/powerpc/platforms/8xx/Kconfig

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