Save 'power_state' early in PSCI CPU_SUSPEND call
This patch adds support to save the "power state" parameter before the
affinity level specific handlers are called in a CPU_SUSPEND call.
This avoids the need to pass the power_state as a parameter to the
handlers and Secure Payload Dispatcher (SPD) suspend spd_pm_ops.
The power_state arguments in the spd_pm_ops operations are now reserved
and must not be used. The SPD can query the relevant power_state fields
by using the psci_get_suspend_afflvl() & psci_get_suspend_stateid() APIs.
NOTE: THIS PATCH WILL BREAK THE SPD_PM_OPS INTERFACE. HENCE THE SECURE
PAYLOAD DISPATCHERS WILL NEED TO BE REWORKED TO USE THE NEW INTERFACE.
Change-Id: I1293d7dc8cf29cfa6a086a009eee41bcbf2f238e
diff --git a/services/std_svc/psci/psci_main.c b/services/std_svc/psci/psci_main.c
index 7fce5fa..506f592 100644
--- a/services/std_svc/psci/psci_main.c
+++ b/services/std_svc/psci/psci_main.c
@@ -125,18 +125,23 @@
if (rc != PSCI_E_SUCCESS)
return rc;
+ /* Save PSCI power state parameter for the core in suspend context */
+ psci_set_suspend_power_state(power_state);
+
/*
* Do what is needed to enter the power down state. Upon success,
* enter the final wfi which will power down this cpu else return
* an error.
*/
rc = psci_afflvl_suspend(&ep,
- power_state,
MPIDR_AFFLVL0,
target_afflvl);
if (rc == PSCI_E_SUCCESS)
psci_power_down_wfi();
assert(rc == PSCI_E_INVALID_PARAMS);
+
+ /* Reset PSCI power state parameter for the core. */
+ psci_set_suspend_power_state(PSCI_INVALID_DATA);
return rc;
}