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arm_mpam: Add helpers to allocate monitors

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MPAM's MSC support a number of monitors, each of which supports
bandwidth counters, or cache-storage-utilisation counters. To use
a counter, a monitor needs to be configured. Add helpers to allocate
and free CSU or MBWU monitors.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Ben Horgan <ben.horgan@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Tested-by: Zeng Heng <zengheng4@huawei.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
James Morse
2025-11-19 12:22:55 +00:00
committed by Catalin Marinas
parent 880df85d86
commit c891bae664
2 changed files with 37 additions and 0 deletions
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2
drivers/resctrl/mpam_devices.c
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@@ -305,6 +305,8 @@ mpam_class_alloc(u8 level_idx, enum mpam_class_types type)
class->level = level_idx;
class->type = type;
INIT_LIST_HEAD_RCU(&class->classes_list);
ida_init(&class->ida_csu_mon);
ida_init(&class->ida_mbwu_mon);
list_add_rcu(&class->classes_list, &mpam_classes);