powerpc/8xx: Always pin TLBs at startup.

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At startup, map 32 Mbytes of memory through 4 pages of 8M,
and PIN them inconditionnaly. They need to be pinned because
KASAN is using page tables early and the TLBs might be
dynamically replaced otherwise.

Remove RSV4I flag after installing mappings unless
CONFIG_PIN_TLB_XXXX is selected.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b27c5767d18053b59f7eefddc189fcc3acf7b9c2.1589866984.git.christophe.leroy@csgroup.eu

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This commit is contained in:

Christophe Leroy 2020-05-19 05:49:15 +00:00 • committed by Michael Ellerman

parent 136a9a0f74

commit 684c1664e0

2 changed files with 18 additions and 32 deletions

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31

arch/powerpc/kernel/head_8xx.S

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19

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

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