powerpc: rework 4xx PTE access and TLB miss

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This is some preliminary work to improve TLB management on SW loaded
TLB powerpc platforms. This introduce support for non-atomic PTE
operations in pgtable-ppc32.h and removes write back to the PTE from
the TLB miss handlers. In addition, the DSI interrupt code no longer
tries to fixup write permission, this is left to generic code, and
_PAGE_HWWRITE is gone.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

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Benjamin Herrenschmidt 2008-07-08 15:54:40 +10:00 • committed by Josh Boyer

parent beae4c03c0

commit 1bc54c0311

5 changed files with 180 additions and 207 deletions

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include/asm-powerpc/pgtable-ppc32.h

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