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arm/versatile: no-MMU support

Vladimir Murzin linux-arm-kernel 1 version New

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Cover letter [PATCH 0/4] arm/versatile: no-MMU support

Hi Greg,

Quoted 12 lines · Greg Ungerer

Does the ARM Versatile machine have a maintainer?
I have CC'ed this patch set to those names reported by get_maintainer. I had no feedback on the first posting of this series back in August.

The following patches support configuring and building the versatile machine with a no-MMU kernel.

There is only a few minor changes required. It was previously possible in older kernels to build for versatile with CONFIG_MMU disabled, but the change to devicetree lost that capability. These changes make it possible again.

Quoted 8 lines

One patch is a fix for address translation (broken in older kernels too), two are build problems when CONFIG_MMU is disabled, and the last is the actuall configuration changes needed.

The motivation for this is that the versatile machine is well supported in qemu. And this provides an excellent platform for development and testing no-MMU support on ARM in general. With these patches applied it is possible to build and run a kernel with MMU disabled on qemu.

I'm wondering if my "Allow NOMMU for MULTIPLATFORM" series [1] work for you?

[1] https://www.spinics.net/lists/arm-kernel/msg546823.html

Cheers
Vladimir

Quoted 17 lines
Signed-off-by Greg Ungerer <[email protected]>
---
 arch/arm/Kconfig                       |   10 ++++++++++
 arch/arm/Kconfig.debug                 |    3 ++-
 arch/arm/include/asm/mach/map.h        |    1 +
 arch/arm/mach-versatile/Kconfig        |    3 ++-
 arch/arm/mach-versatile/Makefile.boot  |    3 +++
 arch/arm/mach-versatile/versatile_dt.c |    4 ++++
 6 files changed, 22 insertions(+), 2 deletions(-)

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