[PATCH 6/7] powerpc/numa: Extract CPU associativity processing into separate function
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COOLING4d
From: Srikar Dronamraju <hidden>
Date: 2026-10-16 11:05:48
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Move the CPU associativity processing loop from parse_numa_properties() into a dedicated process_cpu_associativity() function. This improves code organization by separating concerns: - parse_numa_properties() handles overall NUMA initialization - process_cpu_associativity() focuses on CPU associativity processing This also allows CPU associativity processing to be invoked again after the processor sharing mode is known. No functional change in the initialization flow. Signed-off-by: Srikar Dronamraju <redacted> --- arch/powerpc/mm/numa.c | 65 +++++++++++++++++++++++------------------- 1 file changed, 36 insertions(+), 29 deletions(-)
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index c2aefb60ed5a..fde79f34340e 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c@@ -918,44 +918,18 @@ static int detect_and_enable_coregroup(const __be32 *associativity, int index) return -1; } -static int __init parse_numa_properties(void) +static void process_cpu_associativity(void) { bool vphn = firmware_has_feature(FW_FEATURE_VPHN); - struct device_node *memory, *pci; - int default_nid = 0, index = 0; - const __be32 *associativity; unsigned long i; + int index = 0; - primary_domain_index = find_primary_domain_index(); - - if (primary_domain_index < 0) { - /* - * if we fail to parse primary_domain_index from device tree - * mark the numa disabled, boot with numa disabled. - */ - numa_enabled = false; - return primary_domain_index; - } - - pr_debug("associativity depth for CPU/Memory: %d\n", primary_domain_index); - - /* - * If it is FORM2 initialize the distance table here. - */ - if (affinity_form == FORM2_AFFINITY) - initialize_form2_numa_distance_lookup_table(); - - /* - * Even though we connect cpus to numa domains later in SMP - * init, we need to know the node ids now. This is because - * each node to be onlined must have NODE_DATA etc backing it. - */ for_each_present_cpu(i) { + const __be32 *associativity = NULL; __be32 vphn_assoc[VPHN_ASSOC_BUFSIZE]; struct device_node *cpu = NULL; int nid = NUMA_NO_NODE; - associativity = NULL; if (vphn) { memset(vphn_assoc, 0, VPHN_ASSOC_BUFSIZE * sizeof(__be32)); if (vphn_get_associativity(i, vphn_assoc) == 0)
@@ -984,6 +958,39 @@ static int __init parse_numa_properties(void) if (likely(nid >= 0) && numa_enabled) node_set_online(nid); } +} + +static int __init parse_numa_properties(void) +{ + struct device_node *memory, *pci; + int default_nid = 0; + const __be32 *associativity; + + primary_domain_index = find_primary_domain_index(); + + if (primary_domain_index < 0) { + /* + * if we fail to parse primary_domain_index from device tree + * mark the numa disabled, boot with numa disabled. + */ + numa_enabled = false; + return primary_domain_index; + } + + pr_debug("associativity depth for CPU/Memory: %d\n", primary_domain_index); + + /* + * If it is FORM2 initialize the distance table here. + */ + if (affinity_form == FORM2_AFFINITY) + initialize_form2_numa_distance_lookup_table(); + + /* + * Even though we connect cpus to numa domains later in SMP + * init, we need to know the node ids now. This is because + * each node to be onlined must have NODE_DATA etc backing it. + */ + process_cpu_associativity(); if (numa_enabled == 0) { pr_warn("disabled by user\n");
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2.47.1