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[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>
This commit is contained in:
Heiko Carstens 2008-04-30 13:38:40 +02:00 committed by Martin Schwidefsky
parent edf2209692
commit d00aa4e7d0
2 changed files with 22 additions and 3 deletions
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21
arch/s390/kernel/topology.c
View File

@ -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);

4
include/asm-s390/topology.h
View File

@ -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);