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

[Vladimir Murzin]

On 01/09/17 14:45, Alexandre Torgue wrote:
> Hi Vlad
> 
> On 07/21/2017 03:12 PM, 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:
>>             v1 -> v2
>>                - support for XIP (PATCH 7/8)
>>           - 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
>>
> 
> For no-XIP patches:
> 
> Tested-by: Alexandre TORGUE <alexandre.torgue at st.com>

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
> 
> 
> 
>>   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
>>
>