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Message-ID: <20250711235341.113933-13-tony.luck@intel.com>
Date: Fri, 11 Jul 2025 16:53:19 -0700
From: Tony Luck <tony.luck@...el.com>
To: Fenghua Yu <fenghuay@...dia.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
Peter Newman <peternewman@...gle.com>,
James Morse <james.morse@....com>,
Babu Moger <babu.moger@....com>,
Drew Fustini <dfustini@...libre.com>,
Dave Martin <Dave.Martin@....com>,
Anil Keshavamurthy <anil.s.keshavamurthy@...el.com>,
Chen Yu <yu.c.chen@...el.com>
Cc: x86@...nel.org,
linux-kernel@...r.kernel.org,
patches@...ts.linux.dev,
Tony Luck <tony.luck@...el.com>
Subject: [PATCH v7 12/31] fs/resctrl: Make event details accessible to functions when reading events
All details about a monitor event are kept in the mon_evt structure.
Upper levels of code only provide the event id to lower levels.
This will become a problem when new attributes are added to the
mon_evt structure.
Change the mon_data and rmid_read structures to hold a pointer
to the mon_evt structure instead of just taking a copy of the
event id.
No functional change.
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
fs/resctrl/internal.h | 10 +++++-----
fs/resctrl/ctrlmondata.c | 16 ++++++++--------
fs/resctrl/monitor.c | 17 +++++++++--------
fs/resctrl/rdtgroup.c | 6 +++---
4 files changed, 25 insertions(+), 24 deletions(-)
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h
index e4f06f700063..ef3ec2a4860f 100644
--- a/fs/resctrl/internal.h
+++ b/fs/resctrl/internal.h
@@ -76,7 +76,7 @@ extern struct mon_evt mon_event_all[QOS_NUM_EVENTS];
* struct mon_data - Monitoring details for each event file.
* @list: Member of the global @mon_data_kn_priv_list list.
* @rid: Resource id associated with the event file.
- * @evtid: Event id associated with the event file.
+ * @evt: Event structure associated with the event file.
* @sum: Set for RDT_RESOURCE_L3 when event must be summed
* across multiple domains.
* @domid: When @sum is zero this is the domain to which
@@ -90,7 +90,7 @@ extern struct mon_evt mon_event_all[QOS_NUM_EVENTS];
struct mon_data {
struct list_head list;
enum resctrl_res_level rid;
- enum resctrl_event_id evtid;
+ struct mon_evt *evt;
int domid;
bool sum;
};
@@ -103,7 +103,7 @@ struct mon_data {
* @r: Resource describing the properties of the event being read.
* @hdr: Header of 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.
+ * @evt: Event associated with the event file.
* @first: Initialize MBM counter when true.
* @ci_id: Cacheinfo id for L3. Only set when @hdr is NULL. Used when summing domains.
* @err: Error encountered when reading counter.
@@ -117,7 +117,7 @@ struct rmid_read {
struct rdtgroup *rgrp;
struct rdt_resource *r;
struct rdt_domain_hdr *hdr;
- enum resctrl_event_id evtid;
+ struct mon_evt *evt;
bool first;
unsigned int ci_id;
int err;
@@ -353,7 +353,7 @@ 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_hdr *hdr, struct rdtgroup *rdtgrp,
- cpumask_t *cpumask, int evtid, int first);
+ cpumask_t *cpumask, struct mon_evt *evt, int first);
int resctrl_mon_resource_init(void);
diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c
index 1d7086509bfa..a99903ac5d27 100644
--- a/fs/resctrl/ctrlmondata.c
+++ b/fs/resctrl/ctrlmondata.c
@@ -548,7 +548,7 @@ struct rdt_domain_hdr *resctrl_find_domain(struct list_head *h, int id,
void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
struct rdt_domain_hdr *hdr, struct rdtgroup *rdtgrp,
- cpumask_t *cpumask, int evtid, int first)
+ cpumask_t *cpumask, struct mon_evt *evt, int first)
{
int cpu;
@@ -559,11 +559,11 @@ void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
* Setup the parameters to pass to mon_event_count() to read the data.
*/
rr->rgrp = rdtgrp;
- rr->evtid = evtid;
+ rr->evt = evt;
rr->r = r;
rr->hdr = hdr;
rr->first = first;
- rr->arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, evtid);
+ rr->arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, evt->evtid);
if (IS_ERR(rr->arch_mon_ctx)) {
rr->err = -EINVAL;
return;
@@ -582,20 +582,20 @@ void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
else
smp_call_on_cpu(cpu, smp_mon_event_count, rr, false);
- resctrl_arch_mon_ctx_free(r, evtid, rr->arch_mon_ctx);
+ resctrl_arch_mon_ctx_free(r, evt->evtid, rr->arch_mon_ctx);
}
int rdtgroup_mondata_show(struct seq_file *m, void *arg)
{
struct kernfs_open_file *of = m->private;
enum resctrl_res_level resid;
- enum resctrl_event_id evtid;
struct rdt_domain_hdr *hdr;
struct rmid_read rr = {0};
struct rdtgroup *rdtgrp;
int domid, cpu, ret = 0;
struct rdt_resource *r;
struct cacheinfo *ci;
+ struct mon_evt *evt;
struct mon_data *md;
rdtgrp = rdtgroup_kn_lock_live(of->kn);
@@ -612,7 +612,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
resid = md->rid;
domid = md->domid;
- evtid = md->evtid;
+ evt = md->evt;
r = resctrl_arch_get_resource(resid);
if (md->sum) {
@@ -636,7 +636,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
if (!ci)
continue;
mon_event_read(&rr, r, NULL, rdtgrp,
- &ci->shared_cpu_map, evtid, false);
+ &ci->shared_cpu_map, evt, false);
goto checkresult;
}
}
@@ -652,7 +652,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
ret = -ENOENT;
goto out;
}
- mon_event_read(&rr, r, hdr, rdtgrp, &hdr->cpu_mask, evtid, false);
+ mon_event_read(&rr, r, hdr, rdtgrp, &hdr->cpu_mask, evt, false);
}
checkresult:
diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c
index 28d96147b9f4..6d4191eff391 100644
--- a/fs/resctrl/monitor.c
+++ b/fs/resctrl/monitor.c
@@ -370,8 +370,8 @@ static int __mon_event_count(u32 closid, u32 rmid, struct rmid_read *rr)
RDT_RESOURCE_L3)))
return -EINVAL;
d = container_of(rr->hdr, struct rdt_l3_mon_domain, hdr);
- resctrl_arch_reset_rmid(rr->r, d, closid, rmid, rr->evtid);
- m = get_mbm_state(d, closid, rmid, rr->evtid);
+ resctrl_arch_reset_rmid(rr->r, d, closid, rmid, rr->evt->evtid);
+ m = get_mbm_state(d, closid, rmid, rr->evt->evtid);
if (m)
memset(m, 0, sizeof(struct mbm_state));
return 0;
@@ -382,7 +382,7 @@ static int __mon_event_count(u32 closid, u32 rmid, struct rmid_read *rr)
if (!cpumask_test_cpu(cpu, &rr->hdr->cpu_mask))
return -EINVAL;
rr->err = resctrl_arch_rmid_read(rr->r, rr->hdr, closid, rmid,
- rr->evtid, &tval, rr->arch_mon_ctx);
+ rr->evt->evtid, &tval, rr->arch_mon_ctx);
if (rr->err)
return rr->err;
@@ -411,7 +411,7 @@ static int __mon_event_count(u32 closid, u32 rmid, struct rmid_read *rr)
if (d->ci_id != rr->ci_id)
continue;
err = resctrl_arch_rmid_read(rr->r, &d->hdr, closid, rmid,
- rr->evtid, &tval, rr->arch_mon_ctx);
+ rr->evt->evtid, &tval, rr->arch_mon_ctx);
if (!err) {
rr->val += tval;
ret = 0;
@@ -445,7 +445,7 @@ static void mbm_bw_count(u32 closid, u32 rmid, struct rmid_read *rr)
if (WARN_ON_ONCE(domain_header_is_valid(rr->hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)))
return;
d = container_of(rr->hdr, struct rdt_l3_mon_domain, hdr);
- m = get_mbm_state(d, closid, rmid, rr->evtid);
+ m = get_mbm_state(d, closid, rmid, rr->evt->evtid);
if (WARN_ON_ONCE(!m))
return;
@@ -616,12 +616,13 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_l3_mon_domain *dom_m
static void mbm_update_one_event(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
u32 closid, u32 rmid, enum resctrl_event_id evtid)
{
+ struct mon_evt *evt = &mon_event_all[evtid];
struct rmid_read rr = {0};
rr.r = r;
rr.hdr = &d->hdr;
- rr.evtid = evtid;
- rr.arch_mon_ctx = resctrl_arch_mon_ctx_alloc(rr.r, rr.evtid);
+ rr.evt = evt;
+ rr.arch_mon_ctx = resctrl_arch_mon_ctx_alloc(rr.r, evt->evtid);
if (IS_ERR(rr.arch_mon_ctx)) {
pr_warn_ratelimited("Failed to allocate monitor context: %ld",
PTR_ERR(rr.arch_mon_ctx));
@@ -637,7 +638,7 @@ static void mbm_update_one_event(struct rdt_resource *r, struct rdt_l3_mon_domai
if (is_mba_sc(NULL))
mbm_bw_count(closid, rmid, &rr);
- resctrl_arch_mon_ctx_free(rr.r, rr.evtid, rr.arch_mon_ctx);
+ resctrl_arch_mon_ctx_free(rr.r, evt->evtid, rr.arch_mon_ctx);
}
static void mbm_update(struct rdt_resource *r, struct rdt_l3_mon_domain *d,
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c
index 2467db5bb5e8..6df06bf0e694 100644
--- a/fs/resctrl/rdtgroup.c
+++ b/fs/resctrl/rdtgroup.c
@@ -2903,7 +2903,7 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_res_level rid, int domid,
list_for_each_entry(priv, &mon_data_kn_priv_list, list) {
if (priv->rid == rid && priv->domid == domid &&
- priv->sum == do_sum && priv->evtid == mevt->evtid)
+ priv->sum == do_sum && priv->evt == mevt)
return priv;
}
@@ -2914,7 +2914,7 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_res_level rid, int domid,
priv->rid = rid;
priv->domid = domid;
priv->sum = do_sum;
- priv->evtid = mevt->evtid;
+ priv->evt = mevt;
list_add_tail(&priv->list, &mon_data_kn_priv_list);
return priv;
@@ -3079,7 +3079,7 @@ static int mon_add_all_files(struct kernfs_node *kn, struct rdt_domain_hdr *hdr,
return ret;
if (r->rid == RDT_RESOURCE_L3 && !do_sum && resctrl_is_mbm_event(mevt->evtid))
- mon_event_read(&rr, r, hdr, prgrp, &hdr->cpu_mask, mevt->evtid, true);
+ mon_event_read(&rr, r, hdr, prgrp, &hdr->cpu_mask, mevt, true);
}
return 0;
--
2.50.0
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