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s390/topology: add detection of dedicated vs shared CPUs

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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>
This commit is contained in:
Martin Schwidefsky
2017-09-22 14:17:41 +02:00
parent 8179c7ba10
commit 1887aa07b6
5 changed files with 56 additions and 4 deletions
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10
arch/s390/kernel/smp.c
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@@ -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);