panic_smp_self_stop();
}
+/*
+ * Stop other CPUs in panic. Architecture dependent code may override this
+ * with more suitable version. For example, if the architecture supports
+ * crash dump, it should save registers of each stopped CPU and disable
+ * per-CPU features such as virtualization extensions.
+ */
+void __weak crash_smp_send_stop(void)
+{
+ static int cpus_stopped;
+
+ /*
+ * This function can be called twice in panic path, but obviously
+ * we execute this only once.
+ */
+ if (cpus_stopped)
+ return;
+
+ /*
+ * Note smp_send_stop is the usual smp shutdown function, which
+ * unfortunately means it may not be hardened to work in a panic
+ * situation.
+ */
+ smp_send_stop();
+ cpus_stopped = 1;
+}
+
atomic_t panic_cpu = ATOMIC_INIT(PANIC_CPU_INVALID);
/*
if (!_crash_kexec_post_notifiers) {
printk_nmi_flush_on_panic();
__crash_kexec(NULL);
- }
- /*
- * Note smp_send_stop is the usual smp shutdown function, which
- * unfortunately means it may not be hardened to work in a panic
- * situation.
- */
- smp_send_stop();
+ /*
+ * Note smp_send_stop is the usual smp shutdown function, which
+ * unfortunately means it may not be hardened to work in a
+ * panic situation.
+ */
+ smp_send_stop();
+ } else {
+ /*
+ * If we want to do crash dump after notifier calls and
+ * kmsg_dump, we will need architecture dependent extra
+ * works in addition to stopping other CPUs.
+ */
+ crash_smp_send_stop();
+ }
/*
* Run any panic handlers, including those that might need to