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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-04-30 13:38:40 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-04-30 13:38:45 +0200
commitd00aa4e7d0129983fc4389c85e15a066eb4e69a9 (patch)
tree424089981ed740aa2366e6c5956927e3855de33c
parentedf2209692769d3e461c0351553098bc017c2caf (diff)
[S390] Add topology_core_siblings to topology.h
This exposes the core siblings to user space via sysfs. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
-rw-r--r--arch/s390/kernel/topology.c21
-rw-r--r--include/asm-s390/topology.h4
2 files changed, 22 insertions, 3 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 12b39b3d9c38..0becefcf19b9 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -66,6 +66,8 @@ static struct timer_list topology_timer;
static void set_topology_timer(void);
static DECLARE_WORK(topology_work, topology_work_fn);
+cpumask_t cpu_core_map[NR_CPUS];
+
cpumask_t cpu_coregroup_map(unsigned int cpu)
{
struct core_info *core = &core_info;
@@ -199,6 +201,14 @@ int topology_set_cpu_management(int fc)
return rc;
}
+static void update_cpu_core_map(void)
+{
+ int cpu;
+
+ for_each_present_cpu(cpu)
+ cpu_core_map[cpu] = cpu_coregroup_map(cpu);
+}
+
void arch_update_cpu_topology(void)
{
struct tl_info *info = tl_info;
@@ -206,11 +216,13 @@ void arch_update_cpu_topology(void)
int cpu;
if (!machine_has_topology) {
+ update_cpu_core_map();
topology_update_polarization_simple();
return;
}
stsi(info, 15, 1, 2);
tl_to_cores(info);
+ update_cpu_core_map();
for_each_online_cpu(cpu) {
sysdev = get_cpu_sysdev(cpu);
kobject_uevent(&sysdev->kobj, KOBJ_CHANGE);
@@ -251,20 +263,23 @@ static int __init init_topology_update(void)
{
int rc;
+ rc = 0;
if (!machine_has_topology) {
topology_update_polarization_simple();
- return 0;
+ goto out;
}
init_timer_deferrable(&topology_timer);
if (machine_has_topology_irq) {
rc = register_external_interrupt(0x2005, topology_interrupt);
if (rc)
- return rc;
+ goto out;
ctl_set_bit(0, 8);
}
else
set_topology_timer();
- return 0;
+out:
+ update_cpu_core_map();
+ return rc;
}
__initcall(init_topology_update);
diff --git a/include/asm-s390/topology.h b/include/asm-s390/topology.h
index 8e97b06f298a..d96c91643458 100644
--- a/include/asm-s390/topology.h
+++ b/include/asm-s390/topology.h
@@ -7,6 +7,10 @@
cpumask_t cpu_coregroup_map(unsigned int cpu);
+extern cpumask_t cpu_core_map[NR_CPUS];
+
+#define topology_core_siblings(cpu) (cpu_core_map[cpu])
+
int topology_set_cpu_management(int fc);
void topology_schedule_update(void);