@@ -931,6 +931,37 @@ static int thread_imc_mem_alloc(int cpu_id, int size)
return 0;
}
+static int ppc_thread_imc_cpu_online(unsigned int cpu)
+{
+ int rc = 0;
+ u64 ldbar_value;
+
+ if (per_cpu(thread_imc_mem, cpu) == NULL)
+ rc = thread_imc_mem_alloc(cpu, thread_imc_mem_size);
+
+ if (rc)
+ mtspr(SPRN_LDBAR, 0);
+
+ ldbar_value = ((u64)per_cpu(thread_imc_mem, cpu) & (u64)THREAD_IMC_LDBAR_MASK) |
+ (u64)THREAD_IMC_ENABLE;
+ mtspr(SPRN_LDBAR, ldbar_value);
+ return 0;
+}
+
+static int ppc_thread_imc_cpu_offline(unsigned int cpu)
+{
+ mtspr(SPRN_LDBAR, 0);
+ return 0;
+}
+
+void thread_imc_cpu_init(void)
+{
+ cpuhp_setup_state(CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE,
+ "perf/powerpc/imc_thread:online",
+ ppc_thread_imc_cpu_online,
+ ppc_thread_imc_cpu_offline);
+}
+
/*
* imc_mem_init : Function to support memory allocation for core imc.
*/
@@ -1044,6 +1075,9 @@ int init_imc_pmu(struct imc_events *events, int idx,
return ret;
}
break;
+ case IMC_DOMAIN_THREAD:
+ thread_imc_cpu_init();
+ break;
default:
return -1; /* Unknown domain */
}
@@ -1095,7 +1129,9 @@ int init_imc_pmu(struct imc_events *events, int idx,
cleanup_all_core_imc_memory(pmu_ptr);
}
/* For thread_imc, we have allocated memory, we need to free it */
- if (pmu_ptr->domain == IMC_DOMAIN_THREAD)
+ if (pmu_ptr->domain == IMC_DOMAIN_THREAD) {
+ cpuhp_remove_state(CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE);
cleanup_all_thread_imc_memory();
+ }
return ret;
}
@@ -141,6 +141,7 @@ enum cpuhp_state {
CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE,
CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE,
+ CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE,
CPUHP_AP_WORKQUEUE_ONLINE,
CPUHP_AP_RCUTREE_ONLINE,
CPUHP_AP_ONLINE_DYN,