Enabled early booting of Armv8-R AArch32 based systems.

This patch serie with
https://patchwork.kernel.org/project/xen-devel/list/?series=943154 and
https://gitlab.com/xen-project/people/ayankuma/xen/-/commit/b407e5713c619821f3f5a55da65d4f8f380c3778

will enable build on Xen on Armv8-R AArch32 for MPU.

The current patch serie does *not* conflict with the other serie. Thus, any of
them can be committed in any order.

Ayan Kumar Halder (3):
  xen/arm32: Initialize MM specific registers in enable_mmu
  xen/arm32: mpu: Create boot-time MPU protection regions
  xen/arm32: mpu: Implement a dummy enable_secondary_cpu_mm

Michal Orzel (1):
  xen/arm32: Allow ARM_PA_BITS_40 only if !MPU

 xen/arch/arm/Kconfig                  |   2 +-
 xen/arch/arm/arm32/Makefile           |   1 +
 xen/arch/arm/arm32/head.S             |  14 --
 xen/arch/arm/arm32/mmu/head.S         |  15 +++
 xen/arch/arm/arm32/mpu/Makefile       |   1 +
 xen/arch/arm/arm32/mpu/head.S         | 180 ++++++++++++++++++++++++++
 xen/arch/arm/include/asm/cpregs.h     |   4 +
 xen/arch/arm/include/asm/mpu/cpregs.h |  21 +++
 8 files changed, 223 insertions(+), 15 deletions(-)
 create mode 100644 xen/arch/arm/arm32/mpu/Makefile
 create mode 100644 xen/arch/arm/arm32/mpu/head.S
 create mode 100644 xen/arch/arm/include/asm/mpu/cpregs.h

-- 
2.25.1