[PATCH v5 0/2] arm64: Fix pending single-step debugging issues
From: Sumit Garg
Date: Mon Dec 19 2022 - 05:25:10 EST
This patch-set reworks pending fixes from Wei's series [1] to make
single-step debugging via kgdb/kdb on arm64 work as expected. There was
a prior discussion on ML [2] regarding if we should keep the interrupts
enabled during single-stepping. So patch #1 follows suggestion from Will
[3] to not disable interrupts during single stepping but rather skip
single stepping within interrupt handler.
[1] https://lore.kernel.org/all/20200509214159.19680-1-liwei391@xxxxxxxxxx/
[2] https://lore.kernel.org/all/CAD=FV=Voyfq3Qz0T3RY+aYWYJ0utdH=P_AweB=13rcV8GDBeyQ@xxxxxxxxxxxxxx/
[3] https://lore.kernel.org/all/20200626095551.GA9312@willie-the-truck/
Changes in v5:
- Incorporated misc. comments from Mark.
Changes in v4:
- Rebased to the tip of mainline.
- Picked up Doug's Tested-by tag.
Changes in v3:
- Reword commit descriptions as per Daniel's suggestions.
Changes in v2:
- Replace patch #1 to rather follow Will's suggestion.
Sumit Garg (2):
arm64: entry: Skip single stepping into interrupt handlers
arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step
arch/arm64/include/asm/debug-monitors.h | 1 +
arch/arm64/kernel/debug-monitors.c | 5 +++++
arch/arm64/kernel/entry-common.c | 22 ++++++++++++++++++++--
arch/arm64/kernel/kgdb.c | 2 ++
4 files changed, 28 insertions(+), 2 deletions(-)
--
2.34.1