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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-09-22 15:17:41 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-09-28 08:29:43 +0300 |
| commit | 1887aa07b6765d345dd79f26017aa2d15d49d7af (patch) | |
| tree | 24dcca920f2326ac49c4ccd740d60b8b44e14ba7 /arch/s390/kernel/smp.c | |
| parent | 8179c7ba109a8eca5fdc214d695ef009ee2fa9cb (diff) | |
| download | linux-1887aa07b6765d345dd79f26017aa2d15d49d7af.tar.xz | |
s390/topology: add detection of dedicated vs shared CPUs
The topology information returned by STSI 15.x.x contains a flag
if the CPUs of a topology-list are dedicated or shared. Make this
information available if the machine provides topology information.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 1cee6753d47a..b9fc9b00d845 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -800,6 +800,8 @@ void __init smp_detect_cpus(void) */ static void smp_start_secondary(void *cpuvoid) { + int cpu = smp_processor_id(); + S390_lowcore.last_update_clock = get_tod_clock(); S390_lowcore.restart_stack = (unsigned long) restart_stack; S390_lowcore.restart_fn = (unsigned long) do_restart; @@ -813,8 +815,12 @@ static void smp_start_secondary(void *cpuvoid) init_cpu_timer(); vtime_init(); pfault_init(); - notify_cpu_starting(smp_processor_id()); - set_cpu_online(smp_processor_id(), true); + notify_cpu_starting(cpu); + if (topology_cpu_dedicated(cpu)) + set_cpu_flag(CIF_DEDICATED_CPU); + else + clear_cpu_flag(CIF_DEDICATED_CPU); + set_cpu_online(cpu, true); inc_irq_stat(CPU_RST); local_irq_enable(); cpu_startup_entry(CPUHP_AP_ONLINE_IDLE); |