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Subject[PATCH 4/6] ACPI / PPTT: Populate the cacheinfo.cpu_affinity_map
Date
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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