diff options
| -rw-r--r-- | drivers/resctrl/mpam_resctrl.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index 3af57b6f2c1b..ea60777934ff 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -213,6 +213,76 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_ctrl_domain *d, } } +int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_ctrl_domain *d, + u32 closid, enum resctrl_conf_type t, u32 cfg_val) +{ + u32 partid; + struct mpam_config cfg; + struct mpam_props *cprops; + struct mpam_resctrl_res *res; + struct mpam_resctrl_dom *dom; + + lockdep_assert_cpus_held(); + lockdep_assert_irqs_enabled(); + + /* + * No need to check the CPU as mpam_apply_config() doesn't care, and + * resctrl_arch_update_domains() relies on this. + */ + res = container_of(r, struct mpam_resctrl_res, resctrl_res); + dom = container_of(d, struct mpam_resctrl_dom, resctrl_ctrl_dom); + cprops = &res->class->props; + + partid = resctrl_get_config_index(closid, t); + if (!r->alloc_capable || partid >= resctrl_arch_get_num_closid(r)) { + pr_debug("Not alloc capable or computed PARTID out of range\n"); + return -EINVAL; + } + + /* + * Copy the current config to avoid clearing other resources when the + * same component is exposed multiple times through resctrl. + */ + cfg = dom->ctrl_comp->cfg[partid]; + + switch (r->rid) { + case RDT_RESOURCE_L2: + case RDT_RESOURCE_L3: + cfg.cpbm = cfg_val; + mpam_set_feature(mpam_feat_cpor_part, &cfg); + break; + default: + return -EINVAL; + } + + return mpam_apply_config(dom->ctrl_comp, partid, &cfg); +} + +int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid) +{ + int err; + struct rdt_ctrl_domain *d; + + lockdep_assert_cpus_held(); + lockdep_assert_irqs_enabled(); + + list_for_each_entry_rcu(d, &r->ctrl_domains, hdr.list) { + for (enum resctrl_conf_type t = 0; t < CDP_NUM_TYPES; t++) { + struct resctrl_staged_config *cfg = &d->staged_config[t]; + + if (!cfg->have_new_ctrl) + continue; + + err = resctrl_arch_update_one(r, d, closid, t, + cfg->new_ctrl); + if (err) + return err; + } + } + + return 0; +} + void resctrl_arch_reset_all_ctrls(struct rdt_resource *r) { struct mpam_resctrl_res *res; |