Register the local attached performace access attributes with the memory's
node if HMAT provides the locality table. While HMAT does make it possible
to know performance for all possible initiator-target pairings, we export
only the local and matching pairings at this time.
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
---
drivers/acpi/hmat/Kconfig | 1 +
drivers/acpi/hmat/hmat.c | 14 ++++++++++++++
2 files changed, 15 insertions(+)
diff --git a/drivers/acpi/hmat/Kconfig b/drivers/acpi/hmat/Kconfig
index c9637e2e7514..08e972ead159 100644
--- a/drivers/acpi/hmat/Kconfig
+++ b/drivers/acpi/hmat/Kconfig
@@ -2,6 +2,7 @@
config ACPI_HMAT
bool "ACPI Heterogeneous Memory Attribute Table Support"
depends on ACPI_NUMA
+ select HMEM_REPORTING
help
If set, this option causes the kernel to set the memory NUMA node
relationships and access attributes in accordance with ACPI HMAT
diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c
index 85fd835c2e23..917e6122b3f0 100644
--- a/drivers/acpi/hmat/hmat.c
+++ b/drivers/acpi/hmat/hmat.c
@@ -430,6 +430,19 @@ static __init void hmat_register_target_initiators(struct memory_target *target)
hmat_register_if_local(target, initiator);
}
+static __init void hmat_register_target_perf(struct memory_target *target)
+{
+ unsigned mem_nid = pxm_to_node(target->memory_pxm);
+ struct node_hmem_attrs hmem_attrs = {
+ .read_bandwidth = target->read_bandwidth,
+ .write_bandwidth= target->write_bandwidth,
+ .read_latency = target->read_latency,
+ .write_latency = target->write_latency,
+ };
+
+ node_set_perf_attrs(mem_nid, &hmem_attrs, 0);
+}
+
static __init void hmat_register_targets(void)
{
struct memory_target *target, *tnext;
@@ -439,6 +452,7 @@ static __init void hmat_register_targets(void)
list_for_each_entry_safe(target, tnext, &targets, node) {
list_del(&target->node);
hmat_register_target_initiators(target);
+ hmat_register_target_perf(target);
kfree(target);
}
--
2.14.4
