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Subject[PATCH v4 0/2] arm64: Introduce IRQ stack
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Hi All,

This is fourth version of the series. A major change is stack trace
support for IRQ stack since v3.

Any feedbacks or comments are always welcome.

Thanks in advance!

Changes since v3:
- Expanded stack trace to support IRQ stack
- Added more comments

Changes since v2:
- Optmised current_thread_info function as removing masking operation
and volatile keyword per James and Catalin
- Reworked irq re-enterance check logic using top-bit comparison of
stacks per James
- Added sp_el0 update in cpu_resume per James
- Selected HAVE_IRQ_EXIT_ON_IRQ_STACK to expose this feature explicitly
- Added a Tested-by tag from James
- Added comments on sp_el0 as a helper messeage

Changes since v1:
- Rebased on top of v4.3-rc1
- Removed Kconfig about IRQ stack, per James
- Used PERCPU for IRQ stack, per James
- Tried to allocate IRQ stack when CPU is about to start up, per James
- Moved sp_el0 update into kernel_entry macro, per James
- Dropped S_SP removal patch, per Mark and James

Jungseok Lee (2):
arm64: Introduce IRQ stack
arm64: Expand the stack trace feature to support IRQ stack

arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/irq.h | 18 ++++++
arch/arm64/include/asm/thread_info.h | 10 +++-
arch/arm64/kernel/asm-offsets.c | 5 ++
arch/arm64/kernel/entry.S | 49 ++++++++++++++--
arch/arm64/kernel/head.S | 5 ++
arch/arm64/kernel/irq.c | 21 +++++++
arch/arm64/kernel/sleep.S | 3 +
arch/arm64/kernel/smp.c | 13 +++-
arch/arm64/kernel/stacktrace.c | 22 ++++++-
arch/arm64/kernel/traps.c | 13 ++++
11 files changed, 149 insertions(+), 11 deletions(-)

--
2.5.0



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