On Wed, 27 Feb 2019 15:50:36 -0700
Keith Busch <keith.busch@xxxxxxxxx> wrote:
> Save the best performace access attributes and register these with the
performance
> 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.
>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
Jonathan
> ---
> drivers/acpi/hmat/Kconfig | 5 ++++-
> drivers/acpi/hmat/hmat.c | 10 +++++++++-
> 2 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/hmat/Kconfig b/drivers/acpi/hmat/Kconfig
> index 13cddd612a52..95a29964dbea 100644
> --- a/drivers/acpi/hmat/Kconfig
> +++ b/drivers/acpi/hmat/Kconfig
> @@ -2,7 +2,10 @@
> config ACPI_HMAT
> bool "ACPI Heterogeneous Memory Attribute Table Support"
> depends on ACPI_NUMA
> + select HMEM_REPORTING
> help
> If set, this option has the kernel parse and report the
> platform's ACPI HMAT (Heterogeneous Memory Attributes Table),
> - and register memory initiators with their targets.
> + register memory initiators with their targets, and export
> + performance attributes through the node's sysfs device if
> + provided.
> diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c
> index bb6a11653729..5b469c98a454 100644
> --- a/drivers/acpi/hmat/hmat.c
> +++ b/drivers/acpi/hmat/hmat.c
> @@ -549,12 +549,20 @@ 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);
> + 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)
