[PATCH v3 0/8] ARM: NOMMU: MPU updates

Russell King - ARM Linux linux at armlinux.org.uk
Fri Oct 13 02:24:18 PDT 2017


Sorry, but I have no working MPS3 platform since it killed its uSD card
with all the FPGA bitstreams on.  I'm waiting (since end of September)
for a replacement from ARM Ltd but there hasn't yet been any progress.

Sure, I can replace the uSD card myself, but the problem is the contents
of the card.

On Fri, Oct 13, 2017 at 10:17:00AM +0100, Vladimir Murzin wrote:
> Gentle ping...
> 
> On 09/10/17 10:20, Vladimir Murzin wrote:
> > Russell, do you have concerns on this series?
> > 
> > Thanks
> > Vladimir
> > 
> > On 25/09/17 10:05, Vladimir Murzin wrote:
> >> Hi,
> >>
> >> This is an update of the existent MPU code which consist set of
> >> clean-ups and enhancements. The most significant changes are in the
> >> way how MPU settings sync-up for secondaries (PATCH 3/8), more
> >> flexible layout for memory (PATCH 7/8) and support for XIP (PATCH
> >> 8/8). Since there is no in-tree user of MPU, support for M-class has
> >> been added (PATCH 6/8).
> >>
> >> There is also practical benefit of patch set:
> >>
> >> "These MPU patches introduce a nice feature that it simplifies the
> >> bootloader: do not need to setup the MPU, for example for coherent DMA
> >> region, which is described in device-tree too." András Szemző
> >>
> >> Changelog:
> >>            v2 -> v3
> >>               - fixed support for XIP (PATCH 8/8)
> >> 	      - rebased on 4.14-rc2
> >>
> >>            v1 -> v2
> >>               - support for XIP (PATCH 8/8)
> >> 	      - rebased on 4.13-rc1
> >>
> >>         RFC v2 -> v1
> >>                - dropped RFC tag
> >> 	       - Tested-by from András
> >> 	       - rebased on 4.12-rc5
> >>
> >>            RFC -> RFC v2
> >> 	       - fixed MPU enable for v7m (PATCH 6/7)
> >>
> >> Thanks!
> >>
> >> Vladimir Murzin (8):
> >>   ARM: NOMMU: Move out MPU setup in separate module
> >>   ARM: NOMMU: Update MPU accessors to use cp15 helpers
> >>   ARM: NOMMU: Rework MPU to be mostly done in C
> >>   ARM: NOMMU: Disallow MPU for XIP
> >>   ARM: Kconfig: Kill CONFIG_VECTORS_BASE
> >>   ARM: V7M: Add support for MPU to M-class
> >>   ARM: NOMMU: Use more MPU regions to cover memory
> >>   ARM: NOMMU: Support MPU in XIP configuration
> >>
> >>  arch/arm/Kconfig                  |   9 -
> >>  arch/arm/Kconfig-nommu            |   4 +-
> >>  arch/arm/include/asm/cputype.h    |  10 +
> >>  arch/arm/include/asm/mpu.h        |  26 +-
> >>  arch/arm/include/asm/smp.h        |   2 +-
> >>  arch/arm/include/asm/v7m.h        |  10 +
> >>  arch/arm/kernel/asm-offsets.c     |  11 +
> >>  arch/arm/kernel/head-nommu.S      | 148 +++++++++---
> >>  arch/arm/kernel/smp.c             |   2 +-
> >>  arch/arm/kernel/vmlinux-xip.lds.S |  23 ++
> >>  arch/arm/mm/Makefile              |   1 +
> >>  arch/arm/mm/nommu.c               | 254 +-------------------
> >>  arch/arm/mm/pmsa-v7.c             | 484 ++++++++++++++++++++++++++++++++++++++
> >>  13 files changed, 682 insertions(+), 302 deletions(-)
> >>  create mode 100644 arch/arm/mm/pmsa-v7.c
> >>
> > 
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel at lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > 
> 

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