core: ffa: make S-EL1 notifications virtualization-aware

Add new defines for the ABI functions FFA_NOTIFICATION_GET and
FFA_NOTIFICATION_INFO_GET to support a more complete implementation of
the ABI.

The bookkeeping of the notification state is moved into a guest specific
struct notif_vm_bitmap.

Asynchronous notification is enabled per guest. Each guest defines its
own notification ID to request bottom half processing.

The FFA_NOTIFICATION_INFO_GET handler is updated to be able to report
multiple guest IDs.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

core/arch/arm/include/ffa.h

@@ -23,6 +23,7 @@
 #define FFA_DENIED		-6
 #define FFA_RETRY		-7
 #define FFA_ABORTED		-8
+#define FFA_NO_DATA		-9
 
 /* FFA_VERSION helpers */
 #define FFA_VERSION_MAJOR		U(1)
@@ -95,6 +96,19 @@
 #define FFA_FEATURES_FUNC_ID_MASK	BIT32(31)
 #define FFA_FEATURES_FEATURE_ID_MASK	GENMASK_32(7, 0)
 
+/* Flags used in calls to FFA_NOTIFICATION_GET interface  */
+#define FFA_NOTIF_FLAG_BITMAP_SP	BIT(0)
+#define FFA_NOTIF_FLAG_BITMAP_VM	BIT(1)
+#define FFA_NOTIF_FLAG_BITMAP_SPM	BIT(2)
+#define FFA_NOTIF_FLAG_BITMAP_HYP	BIT(3)
+
+/* Flags used in calls to FFA_NOTIFICATION_INFO_GET interface */
+#define FFA_NOTIF_INFO_GET_MORE_FLAG		BIT(0)
+#define FFA_NOTIF_INFO_GET_ID_LIST_SHIFT	12
+#define FFA_NOTIF_INFO_GET_ID_COUNT_SHIFT	7
+#define FFA_NOTIF_INFO_GET_ID_COUNT_MASK	0x1F
+
+/* Feature IDs used with FFA_FEATURES */
 #define FFA_FEATURE_NOTIF_PEND_INTR	U(0x1)
 #define FFA_FEATURE_SCHEDULE_RECV_INTR	U(0x2)
 #define FFA_FEATURE_MANAGED_EXIT_INTR	U(0x3)