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
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. */
+);