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cxl: Move QoS class to be calculated from the nearest CPU

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Retrieve the qos_class (QTG ID) using the access coordinates from the
nearest CPU rather than the nearst initiator that may not be a CPU.
This may be the more appropriate number that applications care about.

For most cases, access0 and access1 have the same values.

Link: https://lore.kernel.org/linux-cxl/20240112113023.00006c50@Huawei.com/
Suggested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240308220055.2172956-8-dave.jiang@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2024-03-08 14:59:26 -07:00 committed by Dan Williams
parent 863027d409
commit 6ef83c4e19
1 changed files with 3 additions and 3 deletions
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6
drivers/cxl/core/cdat.c
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@ -198,12 +198,12 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port,
* coordinates in order to allow calculation of access class
* 0 and 1 for region later.
*/
cxl_coordinates_combine(&coord[ACCESS_COORDINATE_LOCAL],
&coord[ACCESS_COORDINATE_LOCAL],
cxl_coordinates_combine(&coord[ACCESS_COORDINATE_CPU],
&coord[ACCESS_COORDINATE_CPU],
&dent->coord);
dent->entries = 1;
rc = cxl_root->ops->qos_class(cxl_root,
&coord[ACCESS_COORDINATE_LOCAL],
&coord[ACCESS_COORDINATE_CPU],
1, &qos_class);
if (rc != 1)
continue;