powerpc/8xx: Use SPRN_SPRG_SCRATCH2 in ITLB miss exception

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In order to re-enable MMU earlier, ensure ITLB miss exception
cannot clobber SPRN_SPRG_SCRATCH0 and SPRN_SPRG_SCRATCH1.
Do so by using SPRN_SPRG_SCRATCH2 and SPRN_M_TW instead, like
the DTLB miss exception.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/abc78e8e9577d473691ebb9996c6413b37bfd9ca.1606231483.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2020-11-24 15:24:57 +00:00 • committed by Michael Ellerman

parent 576e02bbf1

commit a314ea5abf

2 changed files with 8 additions and 8 deletions

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12

arch/powerpc/kernel/head_8xx.S

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4

arch/powerpc/perf/8xx-pmu.c

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