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Diffstat (limited to 'arch/x86/kernel/cpu/resctrl/internal.h')
-rw-r--r--arch/x86/kernel/cpu/resctrl/internal.h194
1 files changed, 143 insertions, 51 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index a4f1aa15f0a2..20c898f09b7e 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -7,6 +7,9 @@
#include <linux/kernfs.h>
#include <linux/fs_context.h>
#include <linux/jump_label.h>
+#include <linux/tick.h>
+
+#include <asm/resctrl.h>
#define L3_QOS_CDP_ENABLE 0x01ULL
@@ -18,7 +21,6 @@
#define MBM_OVERFLOW_INTERVAL 1000
#define MAX_MBA_BW 100u
#define MBA_IS_LINEAR 0x4
-#define MAX_MBA_BW_AMD 0x800
#define MBM_CNTR_WIDTH_OFFSET_AMD 20
#define RMID_VAL_ERROR BIT_ULL(63)
@@ -54,6 +56,47 @@
/* Max event bits supported */
#define MAX_EVT_CONFIG_BITS GENMASK(6, 0)
+/**
+ * cpumask_any_housekeeping() - Choose any CPU in @mask, preferring those that
+ * aren't marked nohz_full
+ * @mask: The mask to pick a CPU from.
+ * @exclude_cpu:The CPU to avoid picking.
+ *
+ * Returns a CPU from @mask, but not @exclude_cpu. If there are housekeeping
+ * CPUs that don't use nohz_full, these are preferred. Pass
+ * RESCTRL_PICK_ANY_CPU to avoid excluding any CPUs.
+ *
+ * When a CPU is excluded, returns >= nr_cpu_ids if no CPUs are available.
+ */
+static inline unsigned int
+cpumask_any_housekeeping(const struct cpumask *mask, int exclude_cpu)
+{
+ unsigned int cpu, hk_cpu;
+
+ if (exclude_cpu == RESCTRL_PICK_ANY_CPU)
+ cpu = cpumask_any(mask);
+ else
+ cpu = cpumask_any_but(mask, exclude_cpu);
+
+ /* Only continue if tick_nohz_full_mask has been initialized. */
+ if (!tick_nohz_full_enabled())
+ return cpu;
+
+ /* If the CPU picked isn't marked nohz_full nothing more needs doing. */
+ if (cpu < nr_cpu_ids && !tick_nohz_full_cpu(cpu))
+ return cpu;
+
+ /* Try to find a CPU that isn't nohz_full to use in preference */
+ hk_cpu = cpumask_nth_andnot(0, mask, tick_nohz_full_mask);
+ if (hk_cpu == exclude_cpu)
+ hk_cpu = cpumask_nth_andnot(1, mask, tick_nohz_full_mask);
+
+ if (hk_cpu < nr_cpu_ids)
+ cpu = hk_cpu;
+
+ return cpu;
+}
+
struct rdt_fs_context {
struct kernfs_fs_context kfc;
bool enable_cdpl2;
@@ -69,9 +112,6 @@ static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc)
return container_of(kfc, struct rdt_fs_context, kfc);
}
-DECLARE_STATIC_KEY_FALSE(rdt_enable_key);
-DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);
-
/**
* struct mon_evt - Entry in the event list of a resource
* @evtid: event id
@@ -87,37 +127,62 @@ struct mon_evt {
};
/**
- * union mon_data_bits - Monitoring details for each event file
+ * union mon_data_bits - Monitoring details for each event file.
* @priv: Used to store monitoring event data in @u
- * as kernfs private data
- * @rid: Resource id associated with the event file
- * @evtid: Event id associated with the event file
- * @domid: The domain to which the event file belongs
- * @u: Name of the bit fields struct
+ * as kernfs private data.
+ * @u.rid: Resource id associated with the event file.
+ * @u.evtid: Event id associated with the event file.
+ * @u.sum: Set when event must be summed across multiple
+ * domains.
+ * @u.domid: When @u.sum is zero this is the domain to which
+ * the event file belongs. When @sum is one this
+ * is the id of the L3 cache that all domains to be
+ * summed share.
+ * @u: Name of the bit fields struct.
*/
union mon_data_bits {
void *priv;
struct {
unsigned int rid : 10;
- enum resctrl_event_id evtid : 8;
+ enum resctrl_event_id evtid : 7;
+ unsigned int sum : 1;
unsigned int domid : 14;
} u;
};
+/**
+ * struct rmid_read - Data passed across smp_call*() to read event count.
+ * @rgrp: Resource group for which the counter is being read. If it is a parent
+ * resource group then its event count is summed with the count from all
+ * its child resource groups.
+ * @r: Resource describing the properties of the event being read.
+ * @d: Domain that the counter should be read from. If NULL then sum all
+ * domains in @r sharing L3 @ci.id
+ * @evtid: Which monitor event to read.
+ * @first: Initialize MBM counter when true.
+ * @ci: Cacheinfo for L3. Only set when @d is NULL. Used when summing domains.
+ * @err: Error encountered when reading counter.
+ * @val: Returned value of event counter. If @rgrp is a parent resource group,
+ * @val includes the sum of event counts from its child resource groups.
+ * If @d is NULL, @val includes the sum of all domains in @r sharing @ci.id,
+ * (summed across child resource groups if @rgrp is a parent resource group).
+ * @arch_mon_ctx: Hardware monitor allocated for this read request (MPAM only).
+ */
struct rmid_read {
struct rdtgroup *rgrp;
struct rdt_resource *r;
- struct rdt_domain *d;
+ struct rdt_mon_domain *d;
enum resctrl_event_id evtid;
bool first;
+ struct cacheinfo *ci;
int err;
u64 val;
+ void *arch_mon_ctx;
};
-extern bool rdt_alloc_capable;
-extern bool rdt_mon_capable;
extern unsigned int rdt_mon_features;
extern struct list_head resctrl_schema_all;
+extern bool resctrl_mounted;
enum rdt_group_type {
RDTCTRL_GROUP = 0,
@@ -192,7 +257,7 @@ struct mongroup {
*/
struct pseudo_lock_region {
struct resctrl_schema *s;
- struct rdt_domain *d;
+ struct rdt_ctrl_domain *d;
u32 cbm;
wait_queue_head_t lock_thread_wq;
int thread_done;
@@ -218,6 +283,7 @@ struct pseudo_lock_region {
* monitor only or ctrl_mon group
* @mon: mongroup related data
* @mode: mode of resource group
+ * @mba_mbps_event: input monitoring event id when mba_sc is enabled
* @plr: pseudo-locked region
*/
struct rdtgroup {
@@ -230,6 +296,7 @@ struct rdtgroup {
enum rdt_group_type type;
struct mongroup mon;
enum rdtgrp_mode mode;
+ enum resctrl_event_id mba_mbps_event;
struct pseudo_lock_region *plr;
};
@@ -296,14 +363,10 @@ struct rftype {
* struct mbm_state - status for each MBM counter in each domain
* @prev_bw_bytes: Previous bytes value read for bandwidth calculation
* @prev_bw: The most recent bandwidth in MBps
- * @delta_bw: Difference between the current and previous bandwidth
- * @delta_comp: Indicates whether to compute the delta_bw
*/
struct mbm_state {
u64 prev_bw_bytes;
u32 prev_bw;
- u32 delta_bw;
- bool delta_comp;
};
/**
@@ -319,35 +382,53 @@ struct arch_mbm_state {
};
/**
- * struct rdt_hw_domain - Arch private attributes of a set of CPUs that share
- * a resource
+ * struct rdt_hw_ctrl_domain - Arch private attributes of a set of CPUs that share
+ * a resource for a control function
* @d_resctrl: Properties exposed to the resctrl file system
* @ctrl_val: array of cache or mem ctrl values (indexed by CLOSID)
+ *
+ * Members of this structure are accessed via helpers that provide abstraction.
+ */
+struct rdt_hw_ctrl_domain {
+ struct rdt_ctrl_domain d_resctrl;
+ u32 *ctrl_val;
+};
+
+/**
+ * struct rdt_hw_mon_domain - Arch private attributes of a set of CPUs that share
+ * a resource for a monitor function
+ * @d_resctrl: Properties exposed to the resctrl file system
* @arch_mbm_total: arch private state for MBM total bandwidth
* @arch_mbm_local: arch private state for MBM local bandwidth
*
* Members of this structure are accessed via helpers that provide abstraction.
*/
-struct rdt_hw_domain {
- struct rdt_domain d_resctrl;
- u32 *ctrl_val;
+struct rdt_hw_mon_domain {
+ struct rdt_mon_domain d_resctrl;
struct arch_mbm_state *arch_mbm_total;
struct arch_mbm_state *arch_mbm_local;
};
-static inline struct rdt_hw_domain *resctrl_to_arch_dom(struct rdt_domain *r)
+static inline struct rdt_hw_ctrl_domain *resctrl_to_arch_ctrl_dom(struct rdt_ctrl_domain *r)
+{
+ return container_of(r, struct rdt_hw_ctrl_domain, d_resctrl);
+}
+
+static inline struct rdt_hw_mon_domain *resctrl_to_arch_mon_dom(struct rdt_mon_domain *r)
{
- return container_of(r, struct rdt_hw_domain, d_resctrl);
+ return container_of(r, struct rdt_hw_mon_domain, d_resctrl);
}
/**
* struct msr_param - set a range of MSRs from a domain
* @res: The resource to use
+ * @dom: The domain to update
* @low: Beginning index from base MSR
* @high: End index
*/
struct msr_param {
struct rdt_resource *res;
+ struct rdt_ctrl_domain *dom;
u32 low;
u32 high;
};
@@ -395,6 +476,8 @@ struct rdt_parse_data {
* @msr_update: Function pointer to update QOS MSRs
* @mon_scale: cqm counter * mon_scale = occupancy in bytes
* @mbm_width: Monitor width, to detect and correct for overflow.
+ * @mbm_cfg_mask: Bandwidth sources that can be tracked when Bandwidth
+ * Monitoring Event Configuration (BMEC) is supported.
* @cdp_enabled: CDP state of this resource
*
* Members of this structure are either private to the architecture
@@ -405,10 +488,10 @@ struct rdt_hw_resource {
struct rdt_resource r_resctrl;
u32 num_closid;
unsigned int msr_base;
- void (*msr_update) (struct rdt_domain *d, struct msr_param *m,
- struct rdt_resource *r);
+ void (*msr_update)(struct msr_param *m);
unsigned int mon_scale;
unsigned int mbm_width;
+ unsigned int mbm_cfg_mask;
bool cdp_enabled;
};
@@ -418,17 +501,16 @@ static inline struct rdt_hw_resource *resctrl_to_arch_res(struct rdt_resource *r
}
int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s,
- struct rdt_domain *d);
+ struct rdt_ctrl_domain *d);
int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s,
- struct rdt_domain *d);
+ struct rdt_ctrl_domain *d);
extern struct mutex rdtgroup_mutex;
extern struct rdt_hw_resource rdt_resources_all[];
extern struct rdtgroup rdtgroup_default;
-DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key);
-
extern struct dentry *debugfs_resctrl;
+extern enum resctrl_event_id mba_mbps_default_event;
enum resctrl_res_level {
RDT_RESOURCE_L3,
@@ -455,6 +537,8 @@ static inline bool resctrl_arch_get_cdp_enabled(enum resctrl_res_level l)
int resctrl_arch_set_cdp_enabled(enum resctrl_res_level l, bool enable);
+void arch_mon_domain_online(struct rdt_resource *r, struct rdt_mon_domain *d);
+
/*
* To return the common struct rdt_resource, which is contained in struct
* rdt_hw_resource, walk the resctrl member of struct rdt_hw_resource.
@@ -520,50 +604,58 @@ void rdtgroup_kn_unlock(struct kernfs_node *kn);
int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name);
int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name,
umode_t mask);
-struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id,
- struct list_head **pos);
+struct rdt_domain_hdr *rdt_find_domain(struct list_head *h, int id,
+ struct list_head **pos);
ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
char *buf, size_t nbytes, loff_t off);
int rdtgroup_schemata_show(struct kernfs_open_file *of,
struct seq_file *s, void *v);
-bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_domain *d,
+ssize_t rdtgroup_mba_mbps_event_write(struct kernfs_open_file *of,
+ char *buf, size_t nbytes, loff_t off);
+int rdtgroup_mba_mbps_event_show(struct kernfs_open_file *of,
+ struct seq_file *s, void *v);
+bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_ctrl_domain *d,
unsigned long cbm, int closid, bool exclusive);
-unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_domain *d,
+unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_ctrl_domain *d,
unsigned long cbm);
enum rdtgrp_mode rdtgroup_mode_by_closid(int closid);
int rdtgroup_tasks_assigned(struct rdtgroup *r);
int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp);
int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp);
-bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned long cbm);
-bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d);
+bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_ctrl_domain *d, unsigned long cbm);
+bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_ctrl_domain *d);
int rdt_pseudo_lock_init(void);
void rdt_pseudo_lock_release(void);
int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp);
void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp);
-struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r);
+struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *r);
+struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r);
int closids_supported(void);
void closid_free(int closid);
-int alloc_rmid(void);
-void free_rmid(u32 rmid);
+int alloc_rmid(u32 closid);
+void free_rmid(u32 closid, u32 rmid);
int rdt_get_mon_l3_config(struct rdt_resource *r);
+void __exit rdt_put_mon_l3_config(void);
bool __init rdt_cpu_has(int flag);
void mon_event_count(void *info);
int rdtgroup_mondata_show(struct seq_file *m, void *arg);
void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
- struct rdt_domain *d, struct rdtgroup *rdtgrp,
- int evtid, int first);
-void mbm_setup_overflow_handler(struct rdt_domain *dom,
- unsigned long delay_ms);
+ struct rdt_mon_domain *d, struct rdtgroup *rdtgrp,
+ cpumask_t *cpumask, int evtid, int first);
+void mbm_setup_overflow_handler(struct rdt_mon_domain *dom,
+ unsigned long delay_ms,
+ int exclude_cpu);
void mbm_handle_overflow(struct work_struct *work);
void __init intel_rdt_mbm_apply_quirk(void);
bool is_mba_sc(struct rdt_resource *r);
-void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms);
+void cqm_setup_limbo_handler(struct rdt_mon_domain *dom, unsigned long delay_ms,
+ int exclude_cpu);
void cqm_handle_limbo(struct work_struct *work);
-bool has_busy_rmid(struct rdt_resource *r, struct rdt_domain *d);
-void __check_limbo(struct rdt_domain *d, bool force_free);
+bool has_busy_rmid(struct rdt_mon_domain *d);
+void __check_limbo(struct rdt_mon_domain *d, bool force_free);
void rdt_domain_reconfigure_cdp(struct rdt_resource *r);
-void __init thread_throttle_mode_init(void);
-void __init mbm_config_rftype_init(const char *config);
+void resctrl_file_fflags_init(const char *config, unsigned long fflags);
void rdt_staged_configs_clear(void);
-
+bool closid_allocated(unsigned int closid);
+int resctrl_find_cleanest_closid(void);
#endif /* _ASM_X86_RESCTRL_INTERNAL_H */
generated by cgit (git 2.34.1) at 2025-07-23 08:52:41 +0000