* [PATCH v2 0/2] powerpc32: handle inverted _PAGE_RW bit outside of TLB handlers
@ 2014-12-17 9:14 ` Christophe Leroy
0 siblings, 0 replies; 2+ messages in thread
From: Christophe Leroy @ 2014-12-17 9:14 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman, scottwood
Cc: linux-kernel, linuxppc-dev, Joakim Tjernlund
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
arch/powerpc/include/asm/pgtable-ppc32.h | 11 ++++++-----
arch/powerpc/include/asm/pgtable.h | 10 +++++++---
arch/powerpc/include/asm/pte-8xx.h | 7 +++----
arch/powerpc/include/asm/pte-common.h | 27 ++++++++++++++++++---------
arch/powerpc/kernel/head_8xx.S | 3 ---
arch/powerpc/mm/gup.c | 2 ++
arch/powerpc/mm/mem.c | 2 +-
arch/powerpc/mm/pgtable_32.c | 24 ++++++++++++++++++++----
8 files changed, 57 insertions(+), 29 deletions(-)
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH v2 0/2] powerpc32: handle inverted _PAGE_RW bit outside of TLB handlers
@ 2014-12-17 9:14 ` Christophe Leroy
0 siblings, 0 replies; 2+ messages in thread
From: Christophe Leroy @ 2014-12-17 9:14 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman, scottwood
Cc: linuxppc-dev, linux-kernel
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
arch/powerpc/include/asm/pgtable-ppc32.h | 11 ++++++-----
arch/powerpc/include/asm/pgtable.h | 10 +++++++---
arch/powerpc/include/asm/pte-8xx.h | 7 +++----
arch/powerpc/include/asm/pte-common.h | 27 ++++++++++++++++++---------
arch/powerpc/kernel/head_8xx.S | 3 ---
arch/powerpc/mm/gup.c | 2 ++
arch/powerpc/mm/mem.c | 2 +-
arch/powerpc/mm/pgtable_32.c | 24 ++++++++++++++++++++----
8 files changed, 57 insertions(+), 29 deletions(-)
^ permalink raw reply [flat|nested] 2+ messages in thread
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