powerpc/mm: Update bits used to skip hash_page

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We test a number of bits from DSISR/SRR1 before deciding
to call hash_page(). If any of these is set, we go directly
to do_page_fault() as the bit indicate a fault that needs
to be handled there (no hashing needed).

This updates the current open-coded masks to use the new
DSISR definitions.

This *does* change the masks actually used in two ways:

 - We used to test various bits that were defined as "always 0"
in the architecture and could be repurposed for something
else. From now on, we just ignore such bits.

 - We were missing some new bits defined on P9

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Benjamin Herrenschmidt 2017-07-19 14:49:27 +10:00 • committed by Michael Ellerman

parent 870cfe77a9

commit 398a719d34

2 changed files with 5 additions and 3 deletions

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6

arch/powerpc/kernel/exceptions-64s.S

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2

arch/powerpc/kernel/head_32.S

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