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| author |   James Morse <james.morse@arm.com> | 2022-09-02 15:48:22 +0000 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-09-23 12:49:04 +0200 |
| commit | fea62d370d7a1ba288d71d0cae7ad47c2a02b839 (patch) | |
| tree | 793f4b78cf0e28afacfd41baec814371fdab9a6a /include/linux/resctrl.h | |
| parent | x86/resctrl: Add per-rmid arch private storage for overflow and chunks (diff) | |
| download | wireguard-linux-fea62d370d7a1ba288d71d0cae7ad47c2a02b839.tar.xz wireguard-linux-fea62d370d7a1ba288d71d0cae7ad47c2a02b839.zip | |
x86/resctrl: Allow per-rmid arch private storage to be reset
To abstract the rmid counters into a helper that returns the number
of bytes counted, architecture specific per-rmid state is needed.
It needs to be possible to reset this hidden state, as the values
may outlive the life of an rmid, or the mount time of the filesystem.
mon_event_read() is called with first = true when an rmid is first
allocated in mkdir_mondata_subdir(). Add resctrl_arch_reset_rmid()
and call it from __mon_event_count()'s rr->first check.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Jamie Iles <quic_jiles@quicinc.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@fujitsu.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Xin Hao <xhao@linux.alibaba.com>
Tested-by: Shaopeng Tan <tan.shaopeng@fujitsu.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20220902154829.30399-15-james.morse@arm.com
Diffstat (limited to 'include/linux/resctrl.h')
| -rw-r--r-- | include/linux/resctrl.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index f4c9101df461..818456770176 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -32,6 +32,16 @@ enum resctrl_conf_type { #define CDP_NUM_TYPES (CDP_DATA + 1) +/* + * Event IDs, the values match those used to program IA32_QM_EVTSEL before + * reading IA32_QM_CTR on RDT systems. + */ +enum resctrl_event_id { + QOS_L3_OCCUP_EVENT_ID = 0x01, + QOS_L3_MBM_TOTAL_EVENT_ID = 0x02, + QOS_L3_MBM_LOCAL_EVENT_ID = 0x03, +}; + /** * struct resctrl_staged_config - parsed configuration to be applied * @new_ctrl: new ctrl value to be loaded @@ -210,4 +220,17 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, int resctrl_online_domain(struct rdt_resource *r, struct rdt_domain *d); void resctrl_offline_domain(struct rdt_resource *r, struct rdt_domain *d); +/** + * resctrl_arch_reset_rmid() - Reset any private state associated with rmid + * and eventid. + * @r: The domain's resource. + * @d: The rmid's domain. + * @rmid: The rmid whose counter values should be reset. + * @eventid: The eventid whose counter values should be reset. + * + * This can be called from any CPU. + */ +void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_domain *d, + u32 rmid, enum resctrl_event_id eventid); + #endif /* _RESCTRL_H */ |