Re: [PATCH v2] powerpc/configs: Add debug configs for debugging

Kernel has multiple config options to run extra validation checks that
can help catch bugs. Define new configs for major subsystems to
make it easy to enable the debug config options for a given area.

Signed-off-by: Gautam Menghani <redacted>
---
v1 -> v2:
1. Split the enablement of configs into pseries and powernv configs.

 arch/powerpc/Makefile                    | 32 ++++++++++++++++++++++++
 arch/powerpc/configs/common_debug.config | 11 ++++++++
 arch/powerpc/configs/locks_debug.config  | 13 ++++++++++
 arch/powerpc/configs/lockup_debug.config |  4 +++
 arch/powerpc/configs/mm_debug.config     | 24 ++++++++++++++++++
 5 files changed, 84 insertions(+)
 create mode 100644 arch/powerpc/configs/common_debug.config
 create mode 100644 arch/powerpc/configs/locks_debug.config
 create mode 100644 arch/powerpc/configs/lockup_debug.config
 create mode 100644 arch/powerpc/configs/mm_debug.config

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 9385db478c59..818aacace875 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile

@@ -352,6 +352,38 @@ ppc64_randconfig:
 	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
 		-f $(srctree)/Makefile randconfig

+generated_configs += pseries_debug_defconfig
+pseries_debug_defconfig:
+	$(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest common_debug)
+
+generated_configs += pseries_locks_debug_defconfig
+pseries_locks_debug_defconfig:
+	$(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest locks_debug)
+
+generated_configs += pseries_mm_debug_defconfig
+pseries_mm_debug_defconfig:
+	$(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest mm_debug)
+
+generated_configs += pseries_lockup_debug_defconfig
+pseries_lockup_debug_defconfig:
+	$(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest lockup_debug)
+
+generated_configs += powernv_debug_defconfig
+powernv_debug_defconfig:
+	$(call merge_into_defconfig,powernv_defconfig,le guest kvm_guest common_debug)
+
+generated_configs += powernv_locks_debug_defconfig
+powernv_locks_debug_defconfig:
+	$(call merge_into_defconfig,powernv_defconfig,le guest kvm_guest locks_debug)
+
+generated_configs += powernv_mm_debug_defconfig
+powernv_mm_debug_defconfig:
+	$(call merge_into_defconfig,powernv_defconfig,le guest kvm_guest mm_debug)
+
+generated_configs += powernv_lockup_debug_defconfig
+powernv_lockup_debug_defconfig:
+	$(call merge_into_defconfig,powernv_defconfig,le guest kvm_guest lockup_debug)
+
 PHONY += $(generated_configs)

 define archhelp

diff --git a/arch/powerpc/configs/common_debug.config b/arch/powerpc/configs/common_debug.config
new file mode 100644
index 000000000000..a341c8b41468
--- /dev/null
+++ b/arch/powerpc/configs/common_debug.config

@@ -0,0 +1,11 @@
+# For use in CI testing
+CONFIG_EXPERT=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_PROVE_RCU=y
+CONFIG_KASAN=y
+CONFIG_UBSAN=y
+CONFIG_DEBUG_PAGEALLOC=y
+CONFIG_DEBUG_VM=y
+CONFIG_DEBUG_OBJECTS=y
+CONFIG_DEBUG_KMEMLEAK=y
+CONFIG_DEBUG_STACKOVERFLOW=y

diff --git a/arch/powerpc/configs/locks_debug.config b/arch/powerpc/configs/locks_debug.config
new file mode 100644
index 000000000000..b2cb23de75db
--- /dev/null
+++ b/arch/powerpc/configs/locks_debug.config

@@ -0,0 +1,13 @@
+CONFIG_EXPERT=y
+CONFIG_PROVE_LOCKING=y
+CONFIG_DEBUG_LOCK_ALLOC=y
+CONFIG_DEBUG_ATOMIC_SLEEP=y
+CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
+CONFIG_DEBUG_MUTEXES=y
+CONFIG_DEBUG_SPINLOCK=y
+CONFIG_DEBUG_RT_MUTEXES=y
+CONFIG_DEBUG_RWSEMS=y
+CONFIG_PROVE_RAW_LOCK_NESTING=y
+CONFIG_RCU_EXPERT=y
+CONFIG_PROVE_RCU=y
+CONFIG_RCU_TRACE=y

diff --git a/arch/powerpc/configs/lockup_debug.config b/arch/powerpc/configs/lockup_debug.config
new file mode 100644
index 000000000000..ad0a79abf60f
--- /dev/null
+++ b/arch/powerpc/configs/lockup_debug.config

@@ -0,0 +1,4 @@
+CONFIG_EXPERT=y
+CONFIG_WQ_WATCHDOG=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_PANIC_ON_OOPS=y

diff --git a/arch/powerpc/configs/mm_debug.config b/arch/powerpc/configs/mm_debug.config
new file mode 100644
index 000000000000..0e88eb983536
--- /dev/null
+++ b/arch/powerpc/configs/mm_debug.config

@@ -0,0 +1,24 @@
+CONFIG_EXPERT=y
+CONFIG_DEBUG_PAGEALLOC=y
+CONFIG_DEBUG_SLAB=y
+CONFIG_KASAN=y
+CONFIG_KFENCE=y
+CONFIG_KMSAN=y
+CONFIG_DEBUG_KMEMLEAK=y
+CONFIG_DEBUG_VM=y
+CONFIG_DEBUG_VIRTUAL=y
+CONFIG_DEBUG_OBJECTS=y
+CONFIG_DEBUG_OBJECTS_FREE=y
+CONFIG_DEBUG_OBJECTS_TIMERS=y
+CONFIG_DEBUG_OBJECTS_WORK=y
+CONFIG_DEBUG_OBJECTS_RCU_HEAD=y
+CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER=y
+CONFIG_SCHED_STACK_END_CHECK=y
+CONFIG_DEBUG_VM_MAPLE_TREE=y
+CONFIG_DEBUG_VM_RB=y
+CONFIG_DEBUG_VM_PGFLAGS=y
+CONFIG_DEBUG_MEMORY_INIT=y
+CONFIG_DEBUG_PER_CPU_MAPS=y
+CONFIG_DEBUG_KMAP_LOCAL=y
+CONFIG_DEBUG_HIGHMEM=y
+CONFIG_DEBUG_STACKOVERFLOW=y
--

2.54.0