[PATCH 4/6] ACPI / PPTT: Populate the cacheinfo.cpu_affinity_map
From: Rob Herring <robh@kernel.org>
Date: 2021-12-16 23:31:44
Also in:
linux-acpi, linux-devicetree, lkml
Subsystem:
acpi, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
The cacheinfo.cpu_affinity_map was added to list the possible CPUs a cache is associated with. Populate the cpu_affinity_map when parsing the ACPI PPTT for cacheinfo. With this, the cache CPU affinities are represented in the same way for DT and ACPI. Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Len Brown <lenb@kernel.org> Cc: linux-acpi@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> --- drivers/acpi/pptt.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index 701f61c01359..686018f4e7ed 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c@@ -418,6 +418,30 @@ static void update_cache_properties(struct cacheinfo *this_leaf, } } +static void acpi_set_cache_cpumask(struct acpi_table_header *table, + struct cacheinfo *this_leaf, + struct acpi_pptt_processor *match_cpu_node) +{ + int cpu; + + /* + * If we found the cache first, we'd still need to walk from each cpu. + */ + for_each_possible_cpu(cpu) { + u32 acpi_cpu_id = get_acpi_id_for_cpu(cpu); + struct acpi_pptt_processor *cpu_node; + struct acpi_pptt_cache *cache; + + cache = acpi_find_cache_node(table, acpi_cpu_id, + this_leaf->type, + this_leaf->level, &cpu_node); + if (!cache || cpu_node != match_cpu_node) + continue; + + cpumask_set_cpu(cpu, &this_leaf->cpu_affinity_map); + } +} + static void cache_setup_acpi_cpu(struct acpi_table_header *table, unsigned int cpu) {
@@ -435,10 +459,11 @@ static void cache_setup_acpi_cpu(struct acpi_table_header *table, this_leaf->level, &cpu_node); pr_debug("found = %p %p\n", found_cache, cpu_node); - if (found_cache) + if (found_cache) { update_cache_properties(this_leaf, found_cache, cpu_node, table->revision); - + acpi_set_cache_cpumask(table, this_leaf, cpu_node); + } index++; } }
--
2.32.0
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