CPU topology statedump on x86

[lttng-modules.git] / lttng-statedump-impl.c

diff --git a/lttng-statedump-impl.c b/lttng-statedump-impl.c
index ecec4f0bc42bb12f84ce5a9ac1fa33c62edbf3df..8c737f9b9f13d45c3b2799a6a1ab9228b0aa9d7c 100644 (file)
--- a/lttng-statedump-impl.c
+++ b/lttng-statedump-impl.c
@@ -63,6 +63,9 @@ DEFINE_TRACE(lttng_statedump_file_descriptor);
 DEFINE_TRACE(lttng_statedump_start);
 DEFINE_TRACE(lttng_statedump_process_state);
 DEFINE_TRACE(lttng_statedump_network_interface);
+#if defined(CONFIG_X86_32) || defined(CONFIG_X86_64)
+DEFINE_TRACE(lttng_statedump_cpu_topology);
+#endif
 
 struct lttng_fd_ctx {
        char *page;
@@ -279,6 +282,28 @@ int lttng_enumerate_file_descriptors(struct lttng_session *session)
        return 0;
 }
 
+#if defined(CONFIG_X86_32) || defined(CONFIG_X86_64)
+static
+int lttng_enumerate_cpu_topology(struct lttng_session *session)
+{
+       int cpu;
+       const cpumask_t *cpumask = cpu_possible_mask;
+
+       for (cpu = cpumask_first(cpumask); cpu < nr_cpu_ids;
+                       cpu = cpumask_next(cpu, cpumask)) {
+               trace_lttng_statedump_cpu_topology(session, &cpu_data(cpu));
+       }
+
+       return 0;
+}
+#else
+static
+int lttng_enumerate_cpu_topology(struct lttng_session *session)
+{
+       return 0;
+}
+#endif
+
 #if 0
 /*
  * FIXME: we cannot take a mmap_sem while in a RCU read-side critical section
@@ -489,6 +514,9 @@ int do_lttng_statedump(struct lttng_session *session)
        default:
                return ret;
        }
+       ret = lttng_enumerate_cpu_topology(session);
+       if (ret)
+               return ret;
 
        /* TODO lttng_dump_idt_table(session); */
        /* TODO lttng_dump_softirq_vec(session); */