[S390] topology: expose core identifier
Provide a topology_core_id define which makes sure that the contents of
/sys/devices/system/cpu/cpuX/topology/core_id
indeed do contain the core id and not always 0.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 247b4c2..bcef007 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -37,7 +37,8 @@
};
struct tl_container {
- unsigned char reserved[8];
+ unsigned char reserved[7];
+ unsigned char id;
};
union tl_entry {
@@ -58,6 +59,7 @@
struct core_info {
struct core_info *next;
+ unsigned char id;
cpumask_t mask;
};
@@ -73,6 +75,7 @@
static DEFINE_SPINLOCK(topology_lock);
cpumask_t cpu_core_map[NR_CPUS];
+unsigned char cpu_core_id[NR_CPUS];
static cpumask_t cpu_coregroup_map(unsigned int cpu)
{
@@ -116,6 +119,7 @@
for_each_present_cpu(lcpu) {
if (cpu_logical_map(lcpu) == rcpu) {
cpu_set(lcpu, core->mask);
+ cpu_core_id[lcpu] = core->id;
smp_cpu_polarization[lcpu] = tl_cpu->pp;
}
}
@@ -158,6 +162,7 @@
break;
case 1:
core = core->next;
+ core->id = tle->container.id;
break;
case 0:
add_cpus_to_core(&tle->cpu, core);