diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-04-30 13:38:40 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-04-30 13:38:45 +0200 |
| commit | d00aa4e7d0129983fc4389c85e15a066eb4e69a9 (patch) | |
| tree | 424089981ed740aa2366e6c5956927e3855de33c | |
| parent | edf2209692769d3e461c0351553098bc017c2caf (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.c | 21 | ||||
| -rw-r--r-- | include/asm-s390/topology.h | 4 |
2 files changed, 22 insertions, 3 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 12b39b3d9c3..0becefcf19b 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 8e97b06f298..d96c9164345 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); |