We have enabled early booting of R82.

Changes from v2 :-
1. Added a new patch "xen/arm: Skip initializing the BSS section when it is empty".
2. Split "xen/arm: mpu: Create boot-time MPU protection regions" into 2 patches.

Changes from v3 :-
1. Removed some of the R-b as the patches have been modified. 

Changes from v4 :-
1. First 3 patches have been committed. Last 3 patches have been rebased.

Changes from v5 :-
1. Changes mentioned in individual patches.

Ayan Kumar Halder (3):
  xen/arm: mpu: Create boot-time MPU protection regions
  xen/arm: mpu: Enable MPU
  xen/arm: mpu: Implement a dummy enable_secondary_cpu_mm

 xen/arch/Kconfig                     |   2 +
 xen/arch/arm/arch.mk                 |   4 +
 xen/arch/arm/arm64/mpu/Makefile      |   1 +
 xen/arch/arm/arm64/mpu/head.S        | 160 +++++++++++++++++++++++++++
 xen/arch/arm/include/asm/arm64/mpu.h |  25 +++++
 xen/arch/arm/include/asm/mm.h        |   2 +-
 xen/arch/arm/smp.c                   |  11 ++
 xen/arch/arm/xen.lds.S               |   1 +
 8 files changed, 205 insertions(+), 1 deletion(-)
 create mode 100644 xen/arch/arm/arm64/mpu/head.S
 create mode 100644 xen/arch/arm/include/asm/arm64/mpu.h

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2.25.1