[PATCH v7 36/49] x86/resctrl: Add end-marker to the resctrl_event_id enum

James Morse
2025-02-28T20:02:09Z

The resctrl_event_id enum gives names to the counter event numbers on x86.
These are used directly by resctrl.

To allow the MPAM driver to keep an array of these the size of the enum
needs to be known.

Add a 'num_events' define which can be used to size an array. This isn't
a member of the enum to avoid updating switch statements that would
otherwise be missing a case.

Signed-off-by: James Morse <james.morse@arm.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
---
include/linux/resctrl_types.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h
index f26450b3326b..654323066174 100644
--- a/include/linux/resctrl_types.h
+++ b/include/linux/resctrl_types.h
@@ -51,4 +51,6 @@ enum resctrl_event_id {
QOS_L3_MBM_LOCAL_EVENT_ID = 0x03,
};

+#define QOS_NUM_EVENTS (QOS_L3_MBM_LOCAL_EVENT_ID + 1)
+
#endif /* __LINUX_RESCTRL_TYPES_H */
--
2.39.5