diff options
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c index 952156c2688d..f44e77dc568b 100644 --- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c +++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c @@ -269,7 +269,8 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of, { struct rdtgroup *rdtgrp; struct rdt_resource *r; - int closid, ret = 0; + int ret = 0; + u32 closid; rdtgrp = rdtgroup_kn_lock_live(of->kn); if (rdtgrp) { @@ -284,3 +285,55 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of, rdtgroup_kn_unlock(of->kn); return ret; } + +void mon_event_read(struct rmid_read *rr, struct rdt_domain *d, + struct rdtgroup *rdtgrp, int evtid) +{ + /* + * setup the parameters to send to the IPI to read the data. + */ + rr->rgrp = rdtgrp; + rr->evtid = evtid; + rr->val = 0; + + smp_call_function_any(&d->cpu_mask, mon_event_count, rr, 1); +} + +int rdtgroup_mondata_show(struct seq_file *m, void *arg) +{ + struct kernfs_open_file *of = m->private; + u32 resid, evtid, domid; + struct rdtgroup *rdtgrp; + struct rdt_resource *r; + union mon_data_bits md; + struct rdt_domain *d; + struct rmid_read rr; + int ret = 0; + + rdtgrp = rdtgroup_kn_lock_live(of->kn); + + md.priv = of->kn->priv; + resid = md.u.rid; + domid = md.u.domid; + evtid = md.u.evtid; + + r = &rdt_resources_all[resid]; + d = rdt_find_domain(r, domid, NULL); + if (!d) { + ret = -ENOENT; + goto out; + } + + mon_event_read(&rr, d, rdtgrp, evtid); + + if (rr.val & RMID_VAL_ERROR) + seq_puts(m, "Error\n"); + else if (rr.val & RMID_VAL_UNAVAIL) + seq_puts(m, "Unavailable\n"); + else + seq_printf(m, "%llu\n", rr.val * r->mon_scale); + +out: + rdtgroup_kn_unlock(of->kn); + return ret; +} |
