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fs/resctrl: Introduce event configuration field in struct mon_evt

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When supported, mbm_event counter assignment mode allows the user to configure
events to track specific types of memory transactions.

Introduce an evt_cfg field in struct mon_evt to define the type of memory
transactions tracked by a monitoring event. Also add a helper function to get
the evt_cfg value.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/cover.1757108044.git.babu.moger@amd.com
This commit is contained in:
Babu Moger 2025-09-05 16:34:14 -05:00 committed by Borislav Petkov (AMD)
parent 84ecefb766
commit ebebda8536
3 changed files with 17 additions and 0 deletions
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5
fs/resctrl/internal.h
View File

@ -56,6 +56,10 @@ static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc)
* @evtid: event id
* @rid: resource id for this event
* @name: name of the event
* @evt_cfg: Event configuration value that represents the
* memory transactions (e.g., READS_TO_LOCAL_MEM,
* READS_TO_REMOTE_MEM) being tracked by @evtid.
* Only valid if @evtid is an MBM event.
* @configurable: true if the event is configurable
* @enabled: true if the event is enabled
*/
@ -63,6 +67,7 @@ struct mon_evt {
enum resctrl_event_id evtid;
enum resctrl_res_level rid;
char *name;
u32 evt_cfg;
bool configurable;
bool enabled;
};

10
fs/resctrl/monitor.c
View File

@ -882,6 +882,11 @@ bool resctrl_is_mon_event_enabled(enum resctrl_event_id eventid)
mon_event_all[eventid].enabled;
}
u32 resctrl_get_mon_evt_cfg(enum resctrl_event_id evtid)
{
return mon_event_all[evtid].evt_cfg;
}
int resctrl_mbm_assign_mode_show(struct kernfs_open_file *of,
struct seq_file *s, void *v)
{
@ -1023,6 +1028,11 @@ int resctrl_mon_resource_init(void)
resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID);
if (!resctrl_is_mon_event_enabled(QOS_L3_MBM_LOCAL_EVENT_ID))
resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID);
mon_event_all[QOS_L3_MBM_TOTAL_EVENT_ID].evt_cfg = r->mon.mbm_cfg_mask;
mon_event_all[QOS_L3_MBM_LOCAL_EVENT_ID].evt_cfg = r->mon.mbm_cfg_mask &
(READS_TO_LOCAL_MEM |
READS_TO_LOCAL_S_MEM |
NON_TEMP_WRITE_TO_LOCAL_MEM);
resctrl_file_fflags_init("num_mbm_cntrs",
RFTYPE_MON_INFO | RFTYPE_RES_CACHE);
resctrl_file_fflags_init("available_mbm_cntrs",

2
include/linux/resctrl.h
View File

@ -409,6 +409,8 @@ static inline bool resctrl_is_mbm_event(enum resctrl_event_id eventid)
eventid <= QOS_L3_MBM_LOCAL_EVENT_ID);
}
u32 resctrl_get_mon_evt_cfg(enum resctrl_event_id eventid);
/* Iterate over all memory bandwidth events */
#define for_each_mbm_event_id(eventid) \
for (eventid = QOS_L3_MBM_TOTAL_EVENT_ID; \