core/cpu: Introduce DEBUG_SERIALIZE_CPU_JOBS

Currently, the PHB reset and PCI enumeration are done concurrently
on multiple CPU cores. The output messages are interleaved and not
readable enough. This adds a option to do the jobs in serialized
fashion for debugging purpose only. The serialized mode should be
always disabled in field.

Suggested-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/core/cpu.c b/core/cpu.c
index 4ae5e66..b5a3614 100644
--- a/core/cpu.c
+++ b/core/cpu.c
@@ -89,6 +89,11 @@ struct cpu_job *__cpu_queue_job(struct cpu_thread *cpu,
 {
 	struct cpu_job *job;
 
+#ifdef DEBUG_SERIALIZE_CPU_JOBS
+	if (cpu == NULL)
+		cpu = this_cpu();
+#endif
+
 	if (cpu && !cpu_is_available(cpu)) {
 		prerror("CPU: Tried to queue job on unavailable CPU 0x%04x\n",
 			cpu->pir);