linux/cfg: add config fragments to disable debug features

New config fragments created to:
- disable debugging on target. Trying to disable any type of debugging that can
affect performances on target.
- disable profiling. Profiling is mainly based on hooks which should not affect
the performance on target. This options allow to test if profiling does affect
the performance or not.
- enable PreemptRT Low Latency Desktop
- disable erratum for new PowerPC revisions targets

Signed-off-by: Adrian Calianu <adrian.calianu@enea.com>
Signed-off-by: Martin Borg <martin.borg@enea.com>

4 files changed, 93 insertions, 0 deletions

diff --git a/recipes-kernel/linux/files/cfg/debug_off.cfg b/recipes-kernel/linux/files/cfg/debug_off.cfg
new file mode 100644
index 0000000..7b4405c
--- /dev/null
+++ b/recipes-kernel/linux/files/cfg/debug_off.cfg
@@ -0,0 +1,48 @@
+CONFIG_EMBEDDED=n
+CONFIG_EXPERT=n
+CONFIG_KGDB=n
+CONFIG_HAVE_ARCH_KGDB=n
+CONFIG_KGDB_KDB=n
+CONFIG_DEBUGGER=n
+CONFIG_DEBUG_KERNEL=n
+CONFIG_PPC_ADV_DEBUG_REGS=n
+CONFIG_HAVE_DMA_API_DEBUG=n
+CONFIG_DEBUG_FS=n
+CONFIG_PM_DEBUG=n
+CONFIG_HAVE_DEBUG_KMEMLEAK=n
+CONFIG_HAVE_DEBUG_STACKOVERFLOW=n
+CONFIG_SCHED_DEBUG=n
+CONFIG_TRACE_IRQFLAGS=n
+CONFIG_STACKTRACE=n
+CONFIG_DEBUG_SHIRQ=n
+CONFIG_DETECT_SOFTLOCKUP=n
+CONFIG_LOCKUP_DETECTOR=n
+CONFIG_HARDLOCKUP_DETECTOR=n
+CONFIG_BOOTPARAM_HARDLOCKUP_ENABLED=n
+CONFIG_DETECT_HUNG_TASK=n
+CONFIG_SCHEDSTATS=n
+CONFIG_TIMER_STATS=n
+CONFIG_DEBUG_OBJECTS=n
+CONFIG_DEBUG_OBJECTS_SELFTEST=n
+CONFIG_DEBUG_OBJECTS_FREE=n
+CONFIG_DEBUG_OBJECTS_TIMERS=n
+CONFIG_DEBUG_SLAB=n
+CONFIG_DEBUG_SPINLOCK=n
+CONFIG_DEBUG_MUTEXES=n
+CONFIG_DEBUG_SPINLOCK_SLEEP=n
+CONFIG_DEBUG_BUGVERBOSE=n
+CONFIG_DEBUG_INFO=n
+CONFIG_DEBUG_VM=n
+CONFIG_DEBUG_VIRTUAL=n
+CONFIG_DEBUG_WRITECOUNT=n
+CONFIG_DEBUG_MEMORY_INIT=n
+CONFIG_DEBUG_LIST=n
+CONFIG_ARCH_WANT_FRAME_POINTERS=n
+CONFIG_FRAME_POINTER=n
+CONFIG_DEBUG_PAGEALLOC=n
+CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=n
+CONFIG_FSL_DPAA_ETH_DEBUGFS=n
+CONFIG_FSL_BMAN_DEBUGFS=n
+CONFIG_FSL_QMAN_DEBUGFS=n
+CONFIG_DEBUG_PREEMPT=n
+CONFIG_JUMP_LABEL=y
diff --git a/recipes-kernel/linux/files/cfg/ppc/erratum_off.cfg b/recipes-kernel/linux/files/cfg/ppc/erratum_off.cfg
new file mode 100644
index 0000000..2ab62f0
--- /dev/null
+++ b/recipes-kernel/linux/files/cfg/ppc/erratum_off.cfg
@@ -0,0 +1,2 @@
+CONFIG_FSL_ERRATUM_A_004801=n
+CONFIG_FSL_ERRATUM_A_005337=n
diff --git a/recipes-kernel/linux/files/cfg/profiling_off.cfg b/recipes-kernel/linux/files/cfg/profiling_off.cfg
new file mode 100644
index 0000000..174b9e4
--- /dev/null
+++ b/recipes-kernel/linux/files/cfg/profiling_off.cfg
@@ -0,0 +1,36 @@
+CONFIG_KALLSYMS=n
+CONFIG_HIGH_RES_TIMERS=n
+CONFIG_TRACEPOINTS=n
+CONFIG_FTRACE=n
+CONFIG_PERF_EVENTS=n
+CONFIG_EVENT_TRACING=n
+CONFIG_KPROBES=n
+CONFIG_KRETPROBES=n
+CONFIG_FUNCTION_TRACER=n
+CONFIG_FUNCTION_GRAPH_TRACER=n
+CONFIG_IRQSOFF_TRACER=n
+CONFIG_PREEMPT_TRACER=n
+CONFIG_SCHED_TRACER=n
+CONFIG_NOP_TRACER=n
+CONFIG_CONTEXT_SWITCH_TRACER=n
+CONFIG_GENERIC_TRACER=n
+CONFIG_TRACER_MAX_TRACE=n
+CONFIG_TRACER_SNAPSHOT=n
+CONFIG_STACK_TRACER=n
+CONFIG_EXPERT=n
+CONFIG_PROC_FS=n
+CONFIG_DEBUG_FS=n
+CONFIG_NO_HZ=n
+CONFIG_HPET_TIMER=n
+CONFIG_CPU_FREQ=n
+CONFIG_CPU_FREQ_GOV_ONDEMAND=n
+CONFIG_TIMER_STATS=n
+CONFIG_TRACING=n
+CONFIG_X86_MSR=n
+CONFIG_DEBUG_INFO=n
+CONFIG_RELAY=n
+CONFIG_MODULE_UNLOAD=n
+CONFIG_PROFILING=n
+CONFIG_OPROFILE=n
+CONFIG_PROFILE_ALL_BRANCHES=n
+CONFIG_OPROFILE_NMI_TIMER=n
diff --git a/recipes-kernel/linux/files/cfg/rt_lld.cfg b/recipes-kernel/linux/files/cfg/rt_lld.cfg
new file mode 100644
index 0000000..ec761f9
--- /dev/null
+++ b/recipes-kernel/linux/files/cfg/rt_lld.cfg
@@ -0,0 +1,7 @@
+CONFIG_PREEMPT=y
+CONFIG_HAVE_PREEMPT_LAZY=y
+CONFIG_PREEMPT__LL=y
+CONFIG_HZ_1000=y
+CONFIG_HZ=1000
+ARCH_USES_GETTIMEOFFSET=y
+CONFIG_NO_HZ_FULL=y