On Thu, Feb 14, 2019 at 6:10 PM Keith Busch <keith.busch@xxxxxxxxx> wrote:
>
> Save the best performance access attributes and register these 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 pairings at this time.
>
> Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> ---
> drivers/acpi/hmat/hmat.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c
> index b29f7160c7bb..6833c4897ff4 100644
> --- a/drivers/acpi/hmat/hmat.c
> +++ b/drivers/acpi/hmat/hmat.c
> @@ -549,12 +549,27 @@ static __init void hmat_register_target_initiators(struct memory_target *target)
> }
> }
>
> +static __init void hmat_register_target_perf(struct memory_target *target)
> +{
> + unsigned mem_nid = pxm_to_node(target->memory_pxm);
> +
> + if (!target->hmem_attrs.read_bandwidth &&
> + !target->hmem_attrs.read_latency &&
> + !target->hmem_attrs.write_bandwidth &&
> + !target->hmem_attrs.write_latency)
> + return;
> +
> + node_set_perf_attrs(mem_nid, &target->hmem_attrs, 0);
> +}
> +
> static __init void hmat_register_targets(void)
> {
> struct memory_target *target;
>
> - list_for_each_entry(target, &targets, node)
> + list_for_each_entry(target, &targets, node) {
> hmat_register_target_initiators(target);
> + hmat_register_target_perf(target);
> + }
> }
>
> static __init void hmat_free_structures(void)
> --
> 2.14.4
>
