diff options
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index cb520dd73bc8..d30830a8eafd 100644 --- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -320,6 +320,19 @@ cat_wrmsr(struct rdt_domain *d, struct msr_param *m, struct rdt_resource *r) wrmsrl(r->msr_base + cbm_idx(r, i), d->ctrl_val[i]); } +struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r) +{ + struct rdt_domain *d; + + list_for_each_entry(d, &r->domains, list) { + /* Find the domain that contains this CPU */ + if (cpumask_test_cpu(cpu, &d->cpu_mask)) + return d; + } + + return NULL; +} + void rdt_ctrl_update(void *arg) { struct msr_param *m = arg; @@ -397,6 +410,19 @@ static int domain_setup_ctrlval(struct rdt_resource *r, struct rdt_domain *d) return 0; } +static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_domain *d) +{ + if (is_llc_occupancy_enabled()) { + d->rmid_busy_llc = kcalloc(BITS_TO_LONGS(r->num_rmid), + sizeof(unsigned long), + GFP_KERNEL); + if (!d->rmid_busy_llc) + return -ENOMEM; + } + + return 0; +} + /* * domain_add_cpu - Add a cpu to a resource's domain list. * @@ -438,6 +464,11 @@ static void domain_add_cpu(int cpu, struct rdt_resource *r) return; } + if (r->mon_capable && domain_setup_mon_state(r, d)) { + kfree(d); + return; + } + cpumask_set_cpu(cpu, &d->cpu_mask); list_add_tail(&d->list, add_pos); } @@ -456,6 +487,7 @@ static void domain_remove_cpu(int cpu, struct rdt_resource *r) cpumask_clear_cpu(cpu, &d->cpu_mask); if (cpumask_empty(&d->cpu_mask)) { kfree(d->ctrl_val); + kfree(d->rmid_busy_llc); list_del(&d->list); kfree(d); } |