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(parent: 7b107a7) | patch
powerpc/32s: Don't use SPRN_SPRG_PGDIR in hash_page
authorChristophe Leroy <christophe.leroy@csgroup.eu>
Wed, 25 Nov 2020 07:10:49 +0000 (07:10 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 3 Dec 2020 14:01:31 +0000 (01:01 +1100)
commit03d701c2d9b0091cf8e96cb49ab7d2a6a9f19937
treefb25935d3fff153e31c5c3334badfadec8b72408tree | snapshot
parent7b107a71e732c298d684ee1bafd82f1a2be58d5ecommit | diff
powerpc/32s: Don't use SPRN_SPRG_PGDIR in hash_page

SPRN_SPRG_PGDIR is there mainly to speedup SW TLB miss handlers
for powerpc 603.

We need to free SPRN_SPRG2 to reduce the mess with CONFIG_VMAP_STACK.

In hash_page(), reading PGDIR from thread_struct will be in the noise
performance wise.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4adca19b7120cdf619956768ed09e74fc6a558f3.1606285014.git.christophe.leroy@csgroup.eu
arch/powerpc/mm/book3s32/hash_low.S diff | blob | history
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