[PATCH v2 0/8] ARM: NOMMU: MPU updates

On 01/09/17 14:45, Alexandre Torgue wrote:

Hi Vlad

On 07/21/2017 03:12 PM, Vladimir Murzin wrote:

quoted

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." Andr?s Szemz?

Changelog:
            v1 -> v2
               - support for XIP (PATCH 7/8)
          - rebased on 4.13-rc1

         RFC v2 -> v1
                - dropped RFC tag
           - Tested-by from Andr?s
           - 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

For no-XIP patches:

Tested-by: Alexandre TORGUE <redacted>

Thanks!

I still have issue with XIP ones, then I continue to analysis ans let you know asap.

Russell, are you happy to take patches modulo XIP one? Alex and I are working
on XIP side and hope we can sort it out around rc1 time frame...

Cheers
Vladimir

Regards
Alex

quoted

  arch/arm/Kconfig                  |   9 -
  arch/arm/Kconfig-nommu            |  17 +-
  arch/arm/include/asm/cputype.h    |  10 +
  arch/arm/include/asm/mpu.h        |  24 +-
  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      | 138 ++++++++---
  arch/arm/kernel/smp.c             |   2 +-
  arch/arm/kernel/vmlinux-xip.lds.S |   3 +
  arch/arm/mm/Makefile              |   1 +
  arch/arm/mm/nommu.c               | 254 +-------------------
  arch/arm/mm/pmsa-v7.c             | 471 ++++++++++++++++++++++++++++++++++++++
  13 files changed, 651 insertions(+), 301 deletions(-)
  create mode 100644 arch/arm/mm/pmsa-v7.c