powercap/intel_rapl: Update RAPL domain name and debug messages

The RAPL domain "name" attribute contains "Package-N", which is ambiguous
on multi-die per-package systems.

Update the name to "package-X-die-Y" on those systems.

No change on systems without multi-die/package.

Update driver debug messages.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-pm@vger.kernel.org
Link: https://lkml.kernel.org/r/6510b784e16374447965925588ec6e46d5d007d8.1557769318.git.len.brown@intel.com

diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c
index 9202dbc..ad78c1d 100644 (file)
--- a/drivers/powercap/intel_rapl.c
+++ b/drivers/powercap/intel_rapl.c
@@ -178,12 +178,15 @@ struct rapl_domain {
 #define power_zone_to_rapl_domain(_zone) \
        container_of(_zone, struct rapl_domain, power_zone)
 
+/* maximum rapl package domain name: package-%d-die-%d */
+#define PACKAGE_DOMAIN_NAME_LENGTH 30
 
-/* Each physical package contains multiple domains, these are the common
+
+/* Each rapl package contains multiple domains, these are the common
  * data across RAPL domains within a package.
  */
 struct rapl_package {
-       unsigned int id; /* physical package/socket id */
+       unsigned int id; /* logical die id, equals physical 1-die systems */
        unsigned int nr_domains;
        unsigned long domain_map; /* bit map of active domains */
        unsigned int power_unit;
@@ -198,6 +201,7 @@ struct rapl_package {
        int lead_cpu; /* one active cpu per package for access */
        /* Track active cpus */
        struct cpumask cpumask;
+       char name[PACKAGE_DOMAIN_NAME_LENGTH];
 };
 
 struct rapl_defaults {
@@ -926,8 +930,8 @@ static int rapl_check_unit_core(struct rapl_package *rp, int cpu)
        value = (msr_val & TIME_UNIT_MASK) >> TIME_UNIT_OFFSET;
        rp->time_unit = 1000000 / (1 << value);
 
-       pr_debug("Core CPU package %d energy=%dpJ, time=%dus, power=%duW\n",
-               rp->id, rp->energy_unit, rp->time_unit, rp->power_unit);
+       pr_debug("Core CPU %s energy=%dpJ, time=%dus, power=%duW\n",
+               rp->name, rp->energy_unit, rp->time_unit, rp->power_unit);
 
        return 0;
 }
@@ -951,8 +955,8 @@ static int rapl_check_unit_atom(struct rapl_package *rp, int cpu)
        value = (msr_val & TIME_UNIT_MASK) >> TIME_UNIT_OFFSET;
        rp->time_unit = 1000000 / (1 << value);
 
-       pr_debug("Atom package %d energy=%dpJ, time=%dus, power=%duW\n",
-               rp->id, rp->energy_unit, rp->time_unit, rp->power_unit);
+       pr_debug("Atom %s energy=%dpJ, time=%dus, power=%duW\n",
+               rp->name, rp->energy_unit, rp->time_unit, rp->power_unit);
 
        return 0;
 }
@@ -1181,7 +1185,7 @@ static void rapl_update_domain_data(struct rapl_package *rp)
        u64 val;
 
        for (dmn = 0; dmn < rp->nr_domains; dmn++) {
-               pr_debug("update package %d domain %s data\n", rp->id,
+               pr_debug("update %s domain %s data\n", rp->name,
                         rp->domains[dmn].name);
                /* exclude non-raw primitives */
                for (prim = 0; prim < NR_RAW_PRIMITIVES; prim++) {
@@ -1206,7 +1210,6 @@ static void rapl_unregister_powercap(void)
 static int rapl_package_register_powercap(struct rapl_package *rp)
 {
        struct rapl_domain *rd;
-       char dev_name[17]; /* max domain name = 7 + 1 + 8 for int + 1 for null*/
        struct powercap_zone *power_zone = NULL;
        int nr_pl, ret;
 
@@ -1217,20 +1220,16 @@ static int rapl_package_register_powercap(struct rapl_package *rp)
        for (rd = rp->domains; rd < rp->domains + rp->nr_domains; rd++) {
                if (rd->id == RAPL_DOMAIN_PACKAGE) {
                        nr_pl = find_nr_power_limit(rd);
-                       pr_debug("register socket %d package domain %s\n",
-                               rp->id, rd->name);
-                       memset(dev_name, 0, sizeof(dev_name));
-                       snprintf(dev_name, sizeof(dev_name), "%s-%d",
-                               rd->name, rp->id);
+                       pr_debug("register package domain %s\n", rp->name);
                        power_zone = powercap_register_zone(&rd->power_zone,
                                                        control_type,
-                                                       dev_name, NULL,
+                                                       rp->name, NULL,
                                                        &zone_ops[rd->id],
                                                        nr_pl,
                                                        &constraint_ops);
                        if (IS_ERR(power_zone)) {
-                               pr_debug("failed to register package, %d\n",
-                                       rp->id);
+                               pr_debug("failed to register power zone %s\n",
+                                       rp->name);
                                return PTR_ERR(power_zone);
                        }
                        /* track parent zone in per package/socket data */
@@ -1256,8 +1255,8 @@ static int rapl_package_register_powercap(struct rapl_package *rp)
                                                &constraint_ops);
 
                if (IS_ERR(power_zone)) {
-                       pr_debug("failed to register power_zone, %d:%s:%s\n",
-                               rp->id, rd->name, dev_name);
+                       pr_debug("failed to register power_zone, %s:%s\n",
+                               rp->name, rd->name);
                        ret = PTR_ERR(power_zone);
                        goto err_cleanup;
                }
@@ -1270,7 +1269,7 @@ err_cleanup:
         * failed after the first domain setup.
         */
        while (--rd >= rp->domains) {
-               pr_debug("unregister package %d domain %s\n", rp->id, rd->name);
+               pr_debug("unregister %s domain %s\n", rp->name, rd->name);
                powercap_unregister_zone(control_type, &rd->power_zone);
        }
 
@@ -1380,8 +1379,8 @@ static void rapl_detect_powerlimit(struct rapl_domain *rd)
        /* check if the domain is locked by BIOS, ignore if MSR doesn't exist */
        if (!rapl_read_data_raw(rd, FW_LOCK, false, &val64)) {
                if (val64) {
-                       pr_info("RAPL package %d domain %s locked by BIOS\n",
-                               rd->rp->id, rd->name);
+                       pr_info("RAPL %s domain %s locked by BIOS\n",
+                               rd->rp->name, rd->name);
                        rd->state |= DOMAIN_STATE_BIOS_LOCKED;
                }
        }
@@ -1410,10 +1409,10 @@ static int rapl_detect_domains(struct rapl_package *rp, int cpu)
        }
        rp->nr_domains = bitmap_weight(&rp->domain_map, RAPL_DOMAIN_MAX);
        if (!rp->nr_domains) {
-               pr_debug("no valid rapl domains found in package %d\n", rp->id);
+               pr_debug("no valid rapl domains found in %s\n", rp->name);
                return -ENODEV;
        }
-       pr_debug("found %d domains on package %d\n", rp->nr_domains, rp->id);
+       pr_debug("found %d domains on %s\n", rp->nr_domains, rp->name);
 
        rp->domains = kcalloc(rp->nr_domains + 1, sizeof(struct rapl_domain),
                        GFP_KERNEL);
@@ -1446,8 +1445,8 @@ static void rapl_remove_package(struct rapl_package *rp)
                        rd_package = rd;
                        continue;
                }
-               pr_debug("remove package, undo power limit on %d: %s\n",
-                        rp->id, rd->name);
+               pr_debug("remove package, undo power limit on %s: %s\n",
+                        rp->name, rd->name);
                powercap_unregister_zone(control_type, &rd->power_zone);
        }
        /* do parent zone last */
@@ -1461,6 +1460,7 @@ static struct rapl_package *rapl_add_package(int cpu)
 {
        int id = topology_logical_die_id(cpu);
        struct rapl_package *rp;
+       struct cpuinfo_x86 *c = &cpu_data(cpu);
        int ret;
 
        rp = kzalloc(sizeof(struct rapl_package), GFP_KERNEL);
@@ -1471,6 +1471,13 @@ static struct rapl_package *rapl_add_package(int cpu)
        rp->id = id;
        rp->lead_cpu = cpu;
 
+       if (topology_max_die_per_package() > 1)
+               snprintf(rp->name, PACKAGE_DOMAIN_NAME_LENGTH,
+                       "package-%d-die-%d", c->phys_proc_id, c->cpu_die_id);
+       else
+               snprintf(rp->name, PACKAGE_DOMAIN_NAME_LENGTH, "package-%d",
+                       c->phys_proc_id);
+
        /* check if the package contains valid domains */
        if (rapl_detect_domains(rp, cpu) ||
                rapl_defaults->check_unit(rp, cpu)) {