diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/hotplug-cpu.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/hotplug-cpu.c | 52 |
1 files changed, 36 insertions, 16 deletions
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c index 0f8cd8b06432..e62835a12d73 100644 --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -70,6 +70,7 @@ static void pseries_cpu_offline_self(void) xics_teardown_cpu(); unregister_slb_shadow(hwcpu); + unregister_vpa(hwcpu); rtas_stop_self(); /* Should never get here... */ @@ -397,6 +398,14 @@ static int dlpar_online_cpu(struct device_node *dn) for_each_present_cpu(cpu) { if (get_hard_smp_processor_id(cpu) != thread) continue; + + if (!topology_is_primary_thread(cpu)) { + if (cpu_smt_control != CPU_SMT_ENABLED) + break; + if (!topology_smt_thread_allowed(cpu)) + break; + } + cpu_maps_update_done(); find_and_update_cpu_nid(cpu); rc = device_online(get_cpu_device(cpu)); @@ -492,7 +501,7 @@ static bool valid_cpu_drc_index(struct device_node *parent, u32 drc_index) bool found = false; int rc, index; - if (of_find_property(parent, "ibm,drc-info", NULL)) + if (of_property_present(parent, "ibm,drc-info")) return drc_info_valid_index(parent, drc_index); /* Note that the format of the ibm,drc-indexes array is @@ -619,17 +628,21 @@ static ssize_t dlpar_cpu_add(u32 drc_index) static unsigned int pseries_cpuhp_cache_use_count(const struct device_node *cachedn) { unsigned int use_count = 0; - struct device_node *dn; + struct device_node *dn, *tn; WARN_ON(!of_node_is_type(cachedn, "cache")); for_each_of_cpu_node(dn) { - if (of_find_next_cache_node(dn) == cachedn) + tn = of_find_next_cache_node(dn); + of_node_put(tn); + if (tn == cachedn) use_count++; } for_each_node_by_type(dn, "cache") { - if (of_find_next_cache_node(dn) == cachedn) + tn = of_find_next_cache_node(dn); + of_node_put(tn); + if (tn == cachedn) use_count++; } @@ -649,10 +662,13 @@ static int pseries_cpuhp_detach_nodes(struct device_node *cpudn) dn = cpudn; while ((dn = of_find_next_cache_node(dn))) { - if (pseries_cpuhp_cache_use_count(dn) > 1) + if (pseries_cpuhp_cache_use_count(dn) > 1) { + of_node_put(dn); break; + } ret = of_changeset_detach_node(&cs, dn); + of_node_put(dn); if (ret) goto out; } @@ -837,29 +853,33 @@ static struct notifier_block pseries_smp_nb = { .notifier_call = pseries_smp_notifier, }; -static int __init pseries_cpu_hotplug_init(void) +void __init pseries_cpu_hotplug_init(void) { int qcss_tok; - unsigned int node; - -#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE - ppc_md.cpu_probe = dlpar_cpu_probe; - ppc_md.cpu_release = dlpar_cpu_release; -#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ - rtas_stop_self_token = rtas_token("stop-self"); - qcss_tok = rtas_token("query-cpu-stopped-state"); + rtas_stop_self_token = rtas_function_token(RTAS_FN_STOP_SELF); + qcss_tok = rtas_function_token(RTAS_FN_QUERY_CPU_STOPPED_STATE); if (rtas_stop_self_token == RTAS_UNKNOWN_SERVICE || qcss_tok == RTAS_UNKNOWN_SERVICE) { printk(KERN_INFO "CPU Hotplug not supported by firmware " "- disabling.\n"); - return 0; + return; } smp_ops->cpu_offline_self = pseries_cpu_offline_self; smp_ops->cpu_disable = pseries_cpu_disable; smp_ops->cpu_die = pseries_cpu_die; +} + +static int __init pseries_dlpar_init(void) +{ + unsigned int node; + +#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE + ppc_md.cpu_probe = dlpar_cpu_probe; + ppc_md.cpu_release = dlpar_cpu_release; +#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ /* Processors can be added/removed only on LPAR */ if (firmware_has_feature(FW_FEATURE_LPAR)) { @@ -878,4 +898,4 @@ static int __init pseries_cpu_hotplug_init(void) return 0; } -machine_arch_initcall(pseries, pseries_cpu_hotplug_init); +machine_arch_initcall(pseries, pseries_dlpar_init); |