From 556c9678a7d4456a677588ce308200a673b7eb1f Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Mon, 4 Jul 2022 11:16:02 +0100 Subject: [PATCH] arch_topology: Set cluster identifier in each core/thread from /cpu-map Let us set the cluster identifier as parsed from the device tree cluster nodes within /cpu-map. We don't support nesting of clusters yet as there are no real hardware to support clusters of clusters. Link: https://lore.kernel.org/r/20220704101605.1318280-19-sudeep.holla@arm.com Tested-by: Ionela Voinescu Tested-by: Conor Dooley Reviewed-by: Ionela Voinescu Signed-off-by: Sudeep Holla --- drivers/base/arch_topology.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 591c1f8e15e2..217a91fc1f59 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -497,7 +497,7 @@ static int __init get_cpu_for_node(struct device_node *node) } static int __init parse_core(struct device_node *core, int package_id, - int core_id) + int cluster_id, int core_id) { char name[20]; bool leaf = true; @@ -513,6 +513,7 @@ static int __init parse_core(struct device_node *core, int package_id, cpu = get_cpu_for_node(t); if (cpu >= 0) { cpu_topology[cpu].package_id = package_id; + cpu_topology[cpu].cluster_id = cluster_id; cpu_topology[cpu].core_id = core_id; cpu_topology[cpu].thread_id = i; } else if (cpu != -ENODEV) { @@ -534,6 +535,7 @@ static int __init parse_core(struct device_node *core, int package_id, } cpu_topology[cpu].package_id = package_id; + cpu_topology[cpu].cluster_id = cluster_id; cpu_topology[cpu].core_id = core_id; } else if (leaf && cpu != -ENODEV) { pr_err("%pOF: Can't get CPU for leaf core\n", core); @@ -543,7 +545,8 @@ static int __init parse_core(struct device_node *core, int package_id, return 0; } -static int __init parse_cluster(struct device_node *cluster, int depth) +static int __init +parse_cluster(struct device_node *cluster, int cluster_id, int depth) { char name[20]; bool leaf = true; @@ -563,7 +566,7 @@ static int __init parse_cluster(struct device_node *cluster, int depth) c = of_get_child_by_name(cluster, name); if (c) { leaf = false; - ret = parse_cluster(c, depth + 1); + ret = parse_cluster(c, i, depth + 1); of_node_put(c); if (ret != 0) return ret; @@ -587,7 +590,7 @@ static int __init parse_cluster(struct device_node *cluster, int depth) } if (leaf) { - ret = parse_core(c, 0, core_id++); + ret = parse_core(c, 0, cluster_id, core_id++); } else { pr_err("%pOF: Non-leaf cluster with core %s\n", cluster, name); @@ -627,7 +630,7 @@ static int __init parse_dt_topology(void) if (!map) goto out; - ret = parse_cluster(map, 0); + ret = parse_cluster(map, -1, 0); if (ret != 0) goto out_map; -- 2.11.0