ARM: Core Stack Improvements/Bug fixes for 2.2 release

[ioannisg]

ARM Architecture related issues scheduled for v2.2 release

New features

• Cortex-A53 (ARMv8, AArch64) support (Add Cortex-A53 (ARMv8, AArch64) support #20263)
• [ARM Cortex-M] Support for Direct Dynamic Interrupts in ARM-only API (Arch arm cortex m direct dynamic irqs #21516 )

Feature Enhancements

• [Enh ARM] Document the ZL IRQ feature (doc: interrupts: add documentation section for zero-latency IRQs #21765)
• [Enh. ARM] Document the incompatibilities between ARMv7-M and ARMv8-M Mainline
• [Enh. ARM Cortex-M] Document ARM Cortex-M Exception priority model (Arch arm cortex m swap locking #22691 )
• [Enh. ARM Cortex-M] Add ARM System Call test (Arch arm cortex m swap locking #22691)
• [Enh. ARM Cortex-M] Add Test for irq_lock(), unlock() function usage from user mode
• [Enh. ARM Cortex-M] Cleanup definitions of fixed MPU regions defined at SoC level (ARM: SoC MPU definition cleanup #21227)
• [Enh. ARM Cortex-M] Skip redundant MPU runtime clean-up in swap() (arch: arm: mpu: no dynamic MPU re-program in swap if not required #22357)
• [Enh. ARM Cortex-R] Added documentation for Qemu Cortex-R5 platform (boards: qemu_cortex_r5: Add board documentation #23146)

Bug Fixes

• Fix Cortex-M stack limit checking in user mode (Arch arm cortex m swap locking #22691)
• Fix Cortex-M MPU races in arch_buffer_validate (Arch arm cortex m swap locking #22691)
• Fix Cortex-R power management interrupt handling (arch: arm: Fix Cortex-R power management interrupt handling #21758)
• Fix Cortex-M linker text section name and clean-up (Arch arm cortex m text section fix #21874)
• Fix Cortex-R linker text section name and clean-up (arch: arm: cortex_r: linker.ld: Fix ROM section names #22672)
• Fix Cortex-M Floating Point initialization in multi-image chain loading (ARM Cortex-M4 stack offset when not using Floating point register sharing #22977)
• Fix ARMv7-M MPU is_in_region() calculation overflow (syscalls: arm: Fix possible overflow in is_in_region function #23239 )
• Fix Cortex-M system call dispatch branch instruction (Arch arm userspace fix syscal eval #23323 )

[jhedberg]

@ioannisg removed this from the release plan since it doesn't look like it'll make it. It didn't feel right to move it to 2.3 either since some items have been completed.

[ioannisg]

@ioannisg removed this from the release plan since it doesn't look like it'll make it. It didn't feel right to move it to 2.3 either since some items have been completed.

@jhedberg that's fine, so, what I will do is to re-scope it and close this before the release, and move the undone tasks to next release.

[ioannisg]

Closing this meta-issue; unfinished tasks moved to #23366