feat(ff-a): forward FFA_VERSION from SPMD to SPMC
Introduced by FF-A v1.1 we must forward a call to FFA_VERSION
to the SPMC so that the ffa version of the caller can be stored
for later use. Since the return of FFA_VERSION is not wrapped in
a FF-A call we need to use a direct message request to do this
forwarding. For the spmd_handler in the SPMC to hand off to the
correct function we use w2 to specify a target framework function.
Therefore we must update PSCI CPU_OFF to do this as well.
Change-Id: Ibaa6832b66f1597b3d65aa8986034f0c5916016d
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
diff --git a/services/std_svc/spmd/spmd_private.h b/services/std_svc/spmd/spmd_private.h
index 1fe5065..4cd6a74 100644
--- a/services/std_svc/spmd/spmd_private.h
+++ b/services/std_svc/spmd/spmd_private.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2019-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2019-2022, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -64,6 +64,16 @@
#define SPMD_DIRECT_MSG_ENDPOINT_ID U(FFA_ENDPOINT_ID_MAX - 1)
+/* Define SPMD target function IDs for framework messages to the SPMC */
+#define SPMD_FWK_MSG_BIT BIT(31)
+#define SPMD_FWK_MSG_PSCI U(0)
+#define SPMD_FWK_MSG_FFA_VERSION_REQ U(0x8)
+#define SPMD_FWK_MSG_FFA_VERSION_RESP U(0x9)
+
+/* Function to build SPMD to SPMC message */
+void spmd_build_spmc_message(gp_regs_t *gpregs, uint8_t target,
+ unsigned long long message);
+
/* Functions used to enter/exit SPMC synchronously */
uint64_t spmd_spm_core_sync_entry(spmd_spm_core_context_t *ctx);
__dead2 void spmd_spm_core_sync_exit(uint64_t rc);