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From: Keith Busch <keith.busch@intel.com>
To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
	linux-mm@kvack.org, linux-api@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Rafael Wysocki <rafael@kernel.org>,
	Dave Hansen <dave.hansen@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Jonathan Cameron <jonathan.cameron@huawei.com>,
	Brice Goglin <Brice.Goglin@inria.fr>,
	Keith Busch <keith.busch@intel.com>
Subject: [PATCHv8 08/10] acpi/hmat: Register performance attributes
Date: Mon, 11 Mar 2019 14:56:04 -0600
Message-ID: <20190311205606.11228-9-keith.busch@intel.com> (raw)
In-Reply-To: <20190311205606.11228-1-keith.busch@intel.com>

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.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.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 01a6eddac6f7..7a3a2b50cadd 100644
--- a/drivers/acpi/hmat/hmat.c
+++ b/drivers/acpi/hmat/hmat.c
@@ -545,12 +545,20 @@ 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


  parent reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-11 20:55 [PATCHv8 00/10] Heterogenous memory node attributes Keith Busch
2019-03-11 20:55 ` [PATCHv8 01/10] acpi: Create subtable parsing infrastructure Keith Busch
2019-03-11 20:55 ` [PATCHv8 02/10] acpi: Add HMAT to generic parsing tables Keith Busch
2019-03-11 20:55 ` [PATCHv8 03/10] acpi/hmat: Parse and report heterogeneous memory Keith Busch
2019-03-11 20:56 ` [PATCHv8 04/10] node: Link memory nodes to their compute nodes Keith Busch
2019-03-13 23:13   ` Rafael J. Wysocki
2019-03-11 20:56 ` [PATCHv8 05/10] node: Add heterogenous memory access attributes Keith Busch
2019-03-13 23:15   ` Rafael J. Wysocki
2019-03-11 20:56 ` [PATCHv8 06/10] node: Add memory-side caching attributes Keith Busch
2019-03-13 23:18   ` Rafael J. Wysocki
2019-03-11 20:56 ` [PATCHv8 07/10] acpi/hmat: Register processor domain to its memory Keith Busch
2019-03-13 23:22   ` Rafael J. Wysocki
2019-03-29 21:15   ` Dan Williams
2019-04-01  5:00     ` Keith Busch
2019-03-11 20:56 ` Keith Busch [this message]
2019-03-11 20:56 ` [PATCHv8 09/10] acpi/hmat: Register memory side cache attributes Keith Busch
2019-03-11 20:56 ` [PATCHv8 10/10] doc/mm: New documentation for memory performance Keith Busch
2019-03-11 23:06 ` [PATCHv8 00/10] Heterogenous memory node attributes Brice Goglin
2019-03-15 17:50 ` Keith Busch
2019-03-16  3:04   ` Greg Kroah-Hartman
2019-04-02 14:56     ` Greg Kroah-Hartman

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