test(plat/fvp/lsp): add example logical partition

Add an example logical partition to the FVP platform that
simply prints and echos the contents of a direct request
with the appropriate direct response.

Change-Id: Ib2052c9a63a74830e5e83bd8c128c5f9b0d94658
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>

diff --git a/plat/arm/board/fvp/fvp_el3_spmc_logical_sp.c b/plat/arm/board/fvp/fvp_el3_spmc_logical_sp.c
new file mode 100644 (file)
index 0000000..b9e4f86
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_el3_spmc_logical_sp.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/debug.h>
+#include <services/el3_spmc_logical_sp.h>
+#include <services/ffa_svc.h>
+#include <smccc_helpers.h>
+
+#define LP_PARTITION_ID 0xC001
+#define LP_UUID {0x47a3bf57, 0xe98e43ad, 0xb7db524f, 0x1588f4e3}
+
+/* Our Logical SP currently only supports receipt of direct messaging. */
+#define PARTITION_PROPERTIES FFA_PARTITION_DIRECT_REQ_RECV
+
+static int32_t sp_init(void)
+{
+       INFO("LSP: Init function called.\n");
+       return 0;
+}
+
+static uint64_t handle_ffa_direct_request(uint32_t smc_fid,  bool secure_origin,
+                                         uint64_t x1, uint64_t x2, uint64_t x3,
+                                         uint64_t x4, void *cookie,
+                                         void *handle, uint64_t flags)
+{
+       uint64_t ret;
+
+       /* Determine if we have a 64 or 32 direct request. */
+       if (smc_fid == FFA_MSG_SEND_DIRECT_REQ_SMC32) {
+               ret = FFA_MSG_SEND_DIRECT_RESP_SMC32;
+       } else if (smc_fid == FFA_MSG_SEND_DIRECT_REQ_SMC64) {
+               ret = FFA_MSG_SEND_DIRECT_RESP_SMC64;
+       } else {
+               panic(); /* Unknown SMC. */
+       }
+       /*
+        * Handle the incoming request. For testing purposes we echo the
+        * incoming message.
+        */
+       INFO("Logical Partition: Received Direct Request from %s world!\n",
+            secure_origin ? "Secure" : "Normal");
+
+       /*
+        * Logical SP's must always send a direct response so we can populate
+        * our response directly.
+        */
+       SMC_RET8(handle, ret, 0, 0, x4, 0, 0, 0, 0);
+}
+
+/* Register logical partition  */
+DECLARE_LOGICAL_PARTITION(
+       my_logical_partition,
+       sp_init,                        /* Init Function */
+       LP_PARTITION_ID,                /* FF-A Partition ID */
+       LP_UUID,                        /* UUID */
+       PARTITION_PROPERTIES,           /* Partition Properties. */
+       handle_ffa_direct_request       /* Callback for direct requests. */
+);

diff --git a/services/std_svc/spm/el3_spmc/spmc.mk b/services/std_svc/spm/el3_spmc/spmc.mk
index 1827536520b9110e861d1f8a6cad13bfd5352cee..8067c74eb37987c7cd8ae13769e497cfcf28089a 100644 (file)
--- a/services/std_svc/spm/el3_spmc/spmc.mk
+++ b/services/std_svc/spm/el3_spmc/spmc.mk
@@ -13,5 +13,12 @@ SPMC_SOURCES :=      $(addprefix services/std_svc/spm/el3_spmc/,     \
                        spmc_setup.c                            \
                        logical_sp.c)
 
+# Specify platform specific logical partition implementation.
+SPMC_LP_SOURCES  := $(addprefix ${PLAT_DIR}/, \
+                    ${PLAT}_el3_spmc_logical_sp.c)
+
+
+SPMC_SOURCES += $(SPMC_LP_SOURCES)
+
 # Let the top-level Makefile know that we intend to include a BL32 image
 NEED_BL32              :=      yes