powerpc/e500: don't pre-check write access on data TLB error

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Don't pre-check write access on read-only pages on data TLB error.

Load the TLB anyway and take a DSI exception when it happens.  This avoids
reading SPRN_ESR at every data TLB error exception.

Link: https://lkml.kernel.org/r/8525518e1657d6032b7e980c1888102828d66950.1719928057.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Christophe Leroy 2024-07-02 15:51:30 +02:00 • committed by Andrew Morton

parent 84319905ca

commit 276d5affbb

1 changed files with 0 additions and 15 deletions

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arch/powerpc/kernel/head_85xx.S

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