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(parent: 16f9c4d) | patch
powerpc/8xx: Use SPRN_SPRG_SCRATCH2 in ITLB miss exception
authorChristophe Leroy <christophe.leroy@csgroup.eu>
Tue, 24 Nov 2020 15:24:57 +0000 (15:24 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 9 Dec 2020 12:48:12 +0000 (23:48 +1100)
commit3873539211673d08073a8bd259adb535df03873f
tree923c8dce3f3deb28a56f4f7627ef34e5de51b4dbtree | snapshot
parent16f9c4d9c57a27428d062ec4b6ca7292ebcc4c79commit | diff
powerpc/8xx: Use SPRN_SPRG_SCRATCH2 in ITLB miss exception

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
arch/powerpc/kernel/head_8xx.S diff | blob | history
arch/powerpc/perf/8xx-pmu.c diff | blob | history
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