Messages in this thread | | | From | Christophe Leroy <> | Subject | [PATCH v4 0/2] powerpc32: handle inverted _PAGE_RW bit outside of TLB handlers | Date | Mon, 19 Jan 2015 17:04:35 +0100 (CET) |
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Some powerpc like the 8xx don't have a RW bit in PTE bits but a RO (Read Only) bit. This patch implements the handling of a _PAGE_RO flag to be used in place of _PAGE_RW
Patchset: 1) powerpc32: adds handling of _PAGE_RO 2) powerpc/8xx: use _PAGE_RO instead of _PAGE_RW
All changes have been successfully tested on MPC885
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr>
--- v2 is a complete rework compared to v1 v3 takes into account comments from Scott on v2 v4 simplified pte_update()
arch/powerpc/include/asm/pgtable-ppc32.h | 12 +++++++----- arch/powerpc/include/asm/pgtable.h | 7 +++++-- arch/powerpc/include/asm/pte-8xx.h | 9 ++++----- arch/powerpc/include/asm/pte-common.h | 25 +++++++++++++++++-------- arch/powerpc/kernel/head_8xx.S | 3 --- arch/powerpc/mm/gup.c | 2 ++ arch/powerpc/mm/pgtable_32.c | 2 +- 7 files changed, 36 insertions(+), 24 deletions(-)
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