hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT -------------------------------- When attempting to enable the MPAM memory bandwidth monitoring feature, we found that MPAM differs from x86 RDT in hardware topology implementation. To maintain compatibility with the interface of version, a small amount of public code needs to be split. According to the x86 SDM, both total memory bandwidth and local memory bandwidth are classified as part of L3 cache monitoring: ~~~ mon_data ├── mon_L3_00 │ ├── llc_occupancy │ ├── mbm_local_bytes │ └── mbm_total_bytes └── mon_L3_01 ├── llc_occupancy ├── mbm_local_bytes └── mbm_total_bytes ~~~ In contrast, for ARM64 MPAM, L3/memory monitoring is implemented using separate L3/MATA resources: ~~~ mon_data ├── mon_L3_01 │ ├── llc_occupancy │ └── mbm_local_bytes ├── mon_L3_195 │ ├── llc_occupancy │ └── mbm_local_bytes ├── mon_MB_00 │ └── mbm_total_bytes └── mon_MB_01 └── mbm_total_bytes ~~~ The public code file fs/resctrl/monitor.c has added a reference to resctrl_arch_mon_resource_init() and removed l3_mon_evt_init(). Both x86 RDT and ARM64 MPAM implement their own versions of resctrl_arch_mon_resource_init() and l3_mon_evt_init(), with the x86 part retaining its original logic unchanged. Fixes: 13e249bf4944 ("x86/resctrl: Move the filesystem portions of resctrl to live in '/fs/'") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- arch/x86/kernel/cpu/resctrl/monitor.c | 52 +++++++++++++++++++++++ drivers/platform/mpam/mpam_resctrl.c | 59 +++++++++++++++++++++++++++ fs/resctrl/internal.h | 15 ------- fs/resctrl/monitor.c | 47 +-------------------- include/linux/resctrl.h | 17 ++++++++ 5 files changed, 129 insertions(+), 61 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index 54cf311b6de4..ad3f4c790a6c 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -267,3 +267,55 @@ void __init intel_rdt_mbm_apply_quirk(void) mbm_cf_rmidthreshold = mbm_cf_table[cf_index].rmidthreshold; mbm_cf = mbm_cf_table[cf_index].cf; } + +static struct mon_evt llc_occupancy_event = { + .name = "llc_occupancy", + .evtid = QOS_L3_OCCUP_EVENT_ID, +}; + +static struct mon_evt mbm_total_event = { + .name = "mbm_total_bytes", + .evtid = QOS_L3_MBM_TOTAL_EVENT_ID, +}; + +static struct mon_evt mbm_local_event = { + .name = "mbm_local_bytes", + .evtid = QOS_L3_MBM_LOCAL_EVENT_ID, +}; + +/* + * Initialize the event list for the resource. + * + * Note that MBM events are also part of RDT_RESOURCE_L3 resource + * because as per the SDM the total and local memory bandwidth + * are enumerated as part of L3 monitoring. + */ +static void l3_mon_evt_init(struct rdt_resource *r) +{ + INIT_LIST_HEAD(&r->evt_list); + + if (resctrl_arch_is_llc_occupancy_enabled()) + list_add_tail(&llc_occupancy_event.list, &r->evt_list); + if (resctrl_arch_is_mbm_total_enabled()) + list_add_tail(&mbm_total_event.list, &r->evt_list); + if (resctrl_arch_is_mbm_local_enabled()) + list_add_tail(&mbm_local_event.list, &r->evt_list); +} + +int resctrl_arch_mon_resource_init(void) +{ + struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3); + + l3_mon_evt_init(r); + + if (resctrl_arch_is_evt_configurable(QOS_L3_MBM_TOTAL_EVENT_ID)) { + mbm_total_event.configurable = true; + mbm_config_rftype_init("mbm_total_bytes_config"); + } + if (resctrl_arch_is_evt_configurable(QOS_L3_MBM_LOCAL_EVENT_ID)) { + mbm_local_event.configurable = true; + mbm_config_rftype_init("mbm_local_bytes_config"); + } + + return 0; +} diff --git a/drivers/platform/mpam/mpam_resctrl.c b/drivers/platform/mpam/mpam_resctrl.c index 38e53c46a9ec..b42cabffb277 100644 --- a/drivers/platform/mpam/mpam_resctrl.c +++ b/drivers/platform/mpam/mpam_resctrl.c @@ -1199,6 +1199,65 @@ int mpam_resctrl_offline_cpu(unsigned int cpu) return 0; } +static struct mon_evt llc_occupancy_event = { + .name = "llc_occupancy", + .evtid = QOS_L3_OCCUP_EVENT_ID, +}; + +static struct mon_evt mbm_total_event = { + .name = "mbm_total_bytes", + .evtid = QOS_L3_MBM_TOTAL_EVENT_ID, +}; + +static struct mon_evt mbm_local_event = { + .name = "mbm_local_bytes", + .evtid = QOS_L3_MBM_LOCAL_EVENT_ID, +}; + +/* + * Initialize the event list for the resource. + * + * Note that MBM events are also part of RDT_RESOURCE_L3 resource + * because as per the SDM the total and local memory bandwidth + * are enumerated as part of L3 monitoring. + */ +static void l3_mon_evt_init(struct rdt_resource *r) +{ + INIT_LIST_HEAD(&r->evt_list); + + if (!r->mon_capable) + return; + + if (r->rid == RDT_RESOURCE_L3) { + if (resctrl_arch_is_llc_occupancy_enabled()) + list_add_tail(&llc_occupancy_event.list, &r->evt_list); + + if (resctrl_arch_is_mbm_local_enabled()) + list_add_tail(&mbm_local_event.list, &r->evt_list); + } + + if ((r->rid == RDT_RESOURCE_MBA) && + resctrl_arch_is_mbm_total_enabled()) + list_add_tail(&mbm_total_event.list, &r->evt_list); +} + +int resctrl_arch_mon_resource_init(void) +{ + l3_mon_evt_init(resctrl_arch_get_resource(RDT_RESOURCE_L3)); + l3_mon_evt_init(resctrl_arch_get_resource(RDT_RESOURCE_MBA)); + + if (resctrl_arch_is_evt_configurable(QOS_L3_MBM_TOTAL_EVENT_ID)) { + mbm_total_event.configurable = true; + mbm_config_rftype_init("mbm_total_bytes_config"); + } + if (resctrl_arch_is_evt_configurable(QOS_L3_MBM_LOCAL_EVENT_ID)) { + mbm_local_event.configurable = true; + mbm_config_rftype_init("mbm_local_bytes_config"); + } + + return 0; +} + static int __init __cacheinfo_ready(void) { cacheinfo_ready = true; diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h index 7a6f46b4edd0..fb620beba958 100644 --- a/fs/resctrl/internal.h +++ b/fs/resctrl/internal.h @@ -66,20 +66,6 @@ static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc) return container_of(kfc, struct rdt_fs_context, kfc); } -/** - * struct mon_evt - Entry in the event list of a resource - * @evtid: event id - * @name: name of the event - * @configurable: true if the event is configurable - * @list: entry in &rdt_resource->evt_list - */ -struct mon_evt { - enum resctrl_event_id evtid; - char *name; - bool configurable; - struct list_head list; -}; - /** * union mon_data_bits - Monitoring details for each event file * @priv: Used to store monitoring event data in @u @@ -306,7 +292,6 @@ void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms, void cqm_handle_limbo(struct work_struct *work); bool has_busy_rmid(struct rdt_domain *d); void __check_limbo(struct rdt_domain *d, bool force_free); -void mbm_config_rftype_init(const char *config); void rdt_staged_configs_clear(void); int resctrl_find_cleanest_closid(void); diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c index 68401ca0827a..7d824dc8fa90 100644 --- a/fs/resctrl/monitor.c +++ b/fs/resctrl/monitor.c @@ -791,40 +791,6 @@ static void dom_data_exit(struct rdt_resource *r) mutex_unlock(&rdtgroup_mutex); } -static struct mon_evt llc_occupancy_event = { - .name = "llc_occupancy", - .evtid = QOS_L3_OCCUP_EVENT_ID, -}; - -static struct mon_evt mbm_total_event = { - .name = "mbm_total_bytes", - .evtid = QOS_L3_MBM_TOTAL_EVENT_ID, -}; - -static struct mon_evt mbm_local_event = { - .name = "mbm_local_bytes", - .evtid = QOS_L3_MBM_LOCAL_EVENT_ID, -}; - -/* - * Initialize the event list for the resource. - * - * Note that MBM events are also part of RDT_RESOURCE_L3 resource - * because as per the SDM the total and local memory bandwidth - * are enumerated as part of L3 monitoring. - */ -static void l3_mon_evt_init(struct rdt_resource *r) -{ - INIT_LIST_HEAD(&r->evt_list); - - if (resctrl_arch_is_llc_occupancy_enabled()) - list_add_tail(&llc_occupancy_event.list, &r->evt_list); - if (resctrl_arch_is_mbm_total_enabled()) - list_add_tail(&mbm_total_event.list, &r->evt_list); - if (resctrl_arch_is_mbm_local_enabled()) - list_add_tail(&mbm_local_event.list, &r->evt_list); -} - int resctrl_mon_resource_init(void) { struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3); @@ -837,18 +803,7 @@ int resctrl_mon_resource_init(void) if (ret) return ret; - l3_mon_evt_init(r); - - if (resctrl_arch_is_evt_configurable(QOS_L3_MBM_TOTAL_EVENT_ID)) { - mbm_total_event.configurable = true; - mbm_config_rftype_init("mbm_total_bytes_config"); - } - if (resctrl_arch_is_evt_configurable(QOS_L3_MBM_LOCAL_EVENT_ID)) { - mbm_local_event.configurable = true; - mbm_config_rftype_init("mbm_local_bytes_config"); - } - - return 0; + return resctrl_arch_mon_resource_init(); } void resctrl_mon_resource_exit(void) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index f4aeccd78afb..edc7264a8369 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -254,6 +254,20 @@ struct resctrl_mon_config_info { int err; }; +/** + * struct mon_evt - Entry in the event list of a resource + * @evtid: event id + * @name: name of the event + * @configurable: true if the event is configurable + * @list: entry in &rdt_resource->evt_list + */ +struct mon_evt { + enum resctrl_event_id evtid; + char *name; + bool configurable; + struct list_head list; +}; + /* * Update and re-load this CPUs defaults. Called via IPI, takes a pointer to * struct resctrl_cpu_sync, or NULL. @@ -405,4 +419,7 @@ extern unsigned int resctrl_rmid_realloc_limit; int resctrl_init(void); void resctrl_exit(void); +int resctrl_arch_mon_resource_init(void); +void mbm_config_rftype_init(const char *config); + #endif /* _RESCTRL_H */ -- 2.25.1