diff mbox series

[v6,03/12] ACPI: HMAT: Introduce 2 levels of generic port access class

Message ID 20240220231402.3156281-4-dave.jiang@intel.com (mailing list archive)
State Handled Elsewhere, archived
Headers show
Series cxl: Add support to report region access coordinates to numa nodes | expand

Commit Message

Dave Jiang Feb. 20, 2024, 11:12 p.m. UTC 
In order to compute access0 and access1 classes for CXL memory, 2 levels
of generic port information must be stored. Access0 will indicate the
generic port access coordinates to the closest initiator and access1
will indicate the generic port access coordinates to the cloest CPU.

Cc: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
v6:
- Remove check for genport when setting p_nodes in
  hmat_update_target_attrs(). (Jonathan)
- Fix access compare logic (kernel test bot)
---
 drivers/acpi/numa/hmat.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

Comments

Jonathan Cameron Feb. 27, 2024, 5:23 p.m. UTC | #1 
On Tue, 20 Feb 2024 16:12:32 -0700
Dave Jiang <dave.jiang@intel.com> wrote:

> In order to compute access0 and access1 classes for CXL memory, 2 levels
> of generic port information must be stored. Access0 will indicate the
> generic port access coordinates to the closest initiator and access1
> will indicate the generic port access coordinates to the cloest CPU.
> 
> Cc: Rafael J. Wysocki <rafael@kernel.org>
> Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff mbox series

Patch

diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index e0144cfbf1f3..a1257888a6df 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -59,7 +59,8 @@  struct target_cache {
 };
 
 enum {
-	NODE_ACCESS_CLASS_GENPORT_SINK = ACCESS_COORDINATE_MAX,
+	NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL = ACCESS_COORDINATE_MAX,
+	NODE_ACCESS_CLASS_GENPORT_SINK_CPU,
 	NODE_ACCESS_CLASS_MAX,
 };
 
@@ -141,7 +142,7 @@  int acpi_get_genport_coordinates(u32 uid,
 	if (!target)
 		return -ENOENT;
 
-	*coord = target->coord[NODE_ACCESS_CLASS_GENPORT_SINK];
+	*coord = target->coord[NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL];
 
 	return 0;
 }
@@ -695,7 +696,8 @@  static void hmat_update_target_attrs(struct memory_target *target,
 	int i;
 
 	/* Don't update for generic port if there's no device handle */
-	if (access == NODE_ACCESS_CLASS_GENPORT_SINK &&
+	if ((access == NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL ||
+	     access == NODE_ACCESS_CLASS_GENPORT_SINK_CPU) &&
 	    !(*(u16 *)target->gen_port_device_handle))
 		return;
 
@@ -736,7 +738,8 @@  static void hmat_update_target_attrs(struct memory_target *target,
 		list_for_each_entry(initiator, &initiators, node) {
 			u32 value;
 
-			if (access == ACCESS_COORDINATE_CPU &&
+			if ((access == ACCESS_COORDINATE_CPU ||
+			     access == NODE_ACCESS_CLASS_GENPORT_SINK_CPU) &&
 			    !initiator->has_cpu) {
 				clear_bit(initiator->processor_pxm, p_nodes);
 				continue;
@@ -775,7 +778,9 @@  static void hmat_update_generic_target(struct memory_target *target)
 	static DECLARE_BITMAP(p_nodes, MAX_NUMNODES);
 
 	hmat_update_target_attrs(target, p_nodes,
-				 NODE_ACCESS_CLASS_GENPORT_SINK);
+				 NODE_ACCESS_CLASS_GENPORT_SINK_LOCAL);
+	hmat_update_target_attrs(target, p_nodes,
+				 NODE_ACCESS_CLASS_GENPORT_SINK_CPU);
 }
 
 static void hmat_register_target_initiators(struct memory_target *target)