linux-kernel - [PATCHv7 08/10] acpi/hmat: Register performance attributes

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Message-Id: <20190227225038.20438-9-keith.busch@intel.com>
Date:   Wed, 27 Feb 2019 15:50:36 -0700
From:   Keith Busch <keith.busch@...el.com>
To:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-mm@...ck.org, linux-api@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rafael Wysocki <rafael@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Keith Busch <keith.busch@...el.com>
Subject: [PATCHv7 08/10] acpi/hmat: Register performance attributes

Save the best performace 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.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Keith Busch <keith.busch@...el.com>
---
 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)
-- 
2.14.4