diff options
| -rw-r--r-- | drivers/hwmon/coretemp.c | 93 |
1 files changed, 37 insertions, 56 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 3ae16c37bd92..cda09cf2e84b 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -103,9 +103,10 @@ struct temp_data { /* Platform Data per Physical CPU */ struct platform_data { - struct device *hwmon_dev; - u16 phys_proc_id; - struct temp_data *core_data[MAX_CORE_DATA]; + struct device *hwmon_dev; + u16 phys_proc_id; + struct cpumask cpumask; + struct temp_data *core_data[MAX_CORE_DATA]; struct device_attribute name_attr; }; @@ -491,16 +492,6 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu, if (attr_no > MAX_CORE_DATA - 1) return -ERANGE; - /* - * Provide a single set of attributes for all HT siblings of a core - * to avoid duplicate sensors (the processor ID and core ID of all - * HT siblings of a core are the same). - * Skip if a HT sibling of this core is already registered. - * This is not an error. - */ - if (pdata->core_data[attr_no] != NULL) - return 0; - tdata = init_temp_data(cpu, pkg_flag); if (!tdata) return -ENOMEM; @@ -665,24 +656,11 @@ static void coretemp_device_remove(unsigned int cpu) mutex_unlock(&pdev_list_mutex); } -static int get_online_core_in_package(struct platform_data *pdata) -{ - int i; - - /* Find online cores, except pkgtemp data */ - for (i = MAX_CORE_DATA - 1; i >= 0; --i) { - if (pdata->core_data[i] && - !pdata->core_data[i]->is_pkg_data) { - return pdata->core_data[i]->cpu; - } - } - return nr_cpu_ids; -} - static void get_core_online(unsigned int cpu) { - struct cpuinfo_x86 *c = &cpu_data(cpu); struct platform_device *pdev = coretemp_get_pdev(cpu); + struct cpuinfo_x86 *c = &cpu_data(cpu); + struct platform_data *pdata; int err; /* @@ -707,6 +685,8 @@ static void get_core_online(unsigned int cpu) err = coretemp_device_add(cpu); if (err) return; + + pdev = coretemp_get_pdev(cpu); /* * Check whether pkgtemp support is available. * If so, add interfaces for pkgtemp. @@ -714,60 +694,60 @@ static void get_core_online(unsigned int cpu) if (cpu_has(c, X86_FEATURE_PTS)) coretemp_add_core(cpu, 1); } + + pdata = platform_get_drvdata(pdev); /* - * Physical CPU device already exists. - * So, just add interfaces for this core. + * Check whether a thread sibling is already online. If not add the + * interface for this CPU core. */ - coretemp_add_core(cpu, 0); + if (!cpumask_intersects(&pdata->cpumask, topology_sibling_cpumask(cpu))) + coretemp_add_core(cpu, 0); + + cpumask_set_cpu(cpu, &pdata->cpumask); } static void put_core_offline(unsigned int cpu) { struct platform_device *pdev = coretemp_get_pdev(cpu); - struct platform_data *pdata; + struct platform_data *pd; struct temp_data *tdata; - int i, indx, target; + int indx, target; /* If the physical CPU device does not exist, just return */ if (!pdev) return; - pdata = platform_get_drvdata(pdev); - - indx = TO_ATTR_NO(cpu); - /* The core id is too big, just return */ + indx = TO_ATTR_NO(cpu); if (indx > MAX_CORE_DATA - 1) return; - if (pdata->core_data[indx] && pdata->core_data[indx]->cpu == cpu) - coretemp_remove_core(pdata, indx); + pd = platform_get_drvdata(pdev); + tdata = pd->core_data[indx]; + + cpumask_clear_cpu(cpu, &pd->cpumask); /* - * If a HT sibling of a core is taken offline, but another HT sibling - * of the same core is still online, register the alternate sibling. - * This ensures that exactly one set of attributes is provided as long - * as at least one HT sibling of a core is online. + * If this is the last thread sibling, remove the CPU core + * interface, If there is still a sibling online, transfer the + * target cpu of that core interface to it. */ - for_each_sibling(i, cpu) { - if (i != cpu) { - get_core_online(i); - /* - * Display temperature sensor data for one HT sibling - * per core only, so abort the loop after one such - * sibling has been found. - */ - break; - } + target = cpumask_any_and(&pd->cpumask, topology_sibling_cpumask(cpu)); + if (target >= nr_cpu_ids) { + coretemp_remove_core(pd, indx); + } else if (tdata && tdata->cpu == cpu) { + mutex_lock(&tdata->update_lock); + tdata->cpu = target; + mutex_unlock(&tdata->update_lock); } + /* * If all cores in this pkg are offline, remove the device. * coretemp_device_remove calls unregister_platform_device, * which in turn calls coretemp_remove. This removes the * pkgtemp entry and does other clean ups. */ - target = get_online_core_in_package(pdata); - if (target >= nr_cpu_ids) { + if (cpumask_empty(&pd->cpumask)) { coretemp_device_remove(cpu); return; } @@ -775,8 +755,9 @@ static void put_core_offline(unsigned int cpu) * Check whether this core is the target for the package * interface. We need to assign it to some other cpu. */ - tdata = pdata->core_data[PKG_SYSFS_ATTR_NO]; + tdata = pd->core_data[PKG_SYSFS_ATTR_NO]; if (tdata && tdata->cpu == cpu) { + target = cpumask_first(&pd->cpumask); mutex_lock(&tdata->update_lock); tdata->cpu = target; mutex_unlock(&tdata->update_lock); |