Add PubSub events for CPU powerdown/powerup
The suspend hook is published at the start of a CPU powerdown
operation. The resume hook is published at the end of a CPU powerup
operation.
Change-Id: I50c05e2dde0d33834095ac41b4fcea4c161bb434
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
diff --git a/include/lib/el3_runtime/pubsub_events.h b/include/lib/el3_runtime/pubsub_events.h
index 9cfedb4..64b3f63 100644
--- a/include/lib/el3_runtime/pubsub_events.h
+++ b/include/lib/el3_runtime/pubsub_events.h
@@ -17,6 +17,13 @@
*/
REGISTER_PUBSUB_EVENT(psci_cpu_on_finish);
+/*
+ * These events are published before/after a CPU has been powered down/up
+ * via the PSCI CPU SUSPEND API.
+ */
+REGISTER_PUBSUB_EVENT(psci_suspend_pwrdown_start);
+REGISTER_PUBSUB_EVENT(psci_suspend_pwrdown_finish);
+
#ifdef AARCH64
/*
* These events are published by the AArch64 context management framework
diff --git a/lib/psci/psci_suspend.c b/lib/psci/psci_suspend.c
index d949067..a77972d 100644
--- a/lib/psci/psci_suspend.c
+++ b/lib/psci/psci_suspend.c
@@ -14,6 +14,7 @@
#include <debug.h>
#include <platform.h>
#include <pmf.h>
+#include <pubsub_events.h>
#include <runtime_instr.h>
#include <stddef.h>
#include "psci_private.h"
@@ -68,6 +69,8 @@
{
unsigned int max_off_lvl = psci_find_max_off_lvl(state_info);
+ PUBLISH_EVENT(psci_suspend_pwrdown_start);
+
/* Save PSCI target power level for the suspend finisher handler */
psci_set_suspend_pwrlvl(end_pwrlvl);
@@ -308,6 +311,8 @@
/* Invalidate the suspend level for the cpu */
psci_set_suspend_pwrlvl(PSCI_INVALID_PWR_LVL);
+ PUBLISH_EVENT(psci_suspend_pwrdown_finish);
+
/*
* Generic management: Now we just need to retrieve the
* information that we had stashed away during the suspend