SPMD: add support for an example SPM core manifest

This patch repurposes the TOS FW configuration file as the manifest for
the SPM core component which will reside at the secure EL adjacent to
EL3. The SPM dispatcher component will use the manifest to determine how
the core component must be initialised. Routines and data structure to
parse the manifest have also been added.

Signed-off-by: Achin Gupta <achin.gupta@arm.com>
Signed-off-by: Artsem Artsemenka <artsem.artsemenka@arm.com>
Change-Id: Id94f8ece43b4e05609f0a1d364708a912f6203cb

common/desc_image_load.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -215,6 +215,9 @@ void populate_next_bl_params_config(bl_params_t *bl2_to_next_bl_params)
 	bl_params_node_t *params_node;
 	unsigned int fw_config_id;
 	uintptr_t hw_config_base = 0, fw_config_base;
+#if defined(SPD_spmd)
+	uint32_t fw_config_size = 0;
+#endif
 	bl_mem_params_node_t *mem_params;
 
 	assert(bl2_to_next_bl_params != NULL);
@@ -249,10 +252,14 @@ void populate_next_bl_params_config(bl_params_t *bl2_to_next_bl_params)
 
 		if (fw_config_id != INVALID_IMAGE_ID) {
 			mem_params = get_bl_mem_params_node(fw_config_id);
-			if (mem_params != NULL)
+			if (mem_params != NULL) {
 				fw_config_base = mem_params->image_info.image_base;
+#if defined(SPD_spmd)
+				fw_config_size =
+					mem_params->image_info.image_size;
+#endif
+			}
 		}
-
 		/*
 		 * Pass hw and tb_fw config addresses to next images. NOTE - for
 		 * EL3 runtime images (BL31 for AArch64 and BL32 for AArch32),
@@ -273,6 +280,11 @@ void populate_next_bl_params_config(bl_params_t *bl2_to_next_bl_params)
 			if (params_node->ep_info->args.arg1 == 0U)
 				params_node->ep_info->args.arg1 =
 								hw_config_base;
+#if defined(SPD_spmd)
+			if (params_node->ep_info->args.arg2 == 0U)
+				params_node->ep_info->args.arg2 =
+								fw_config_size;
+#endif
 		}
 	}
 }

include/plat/common/platform.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -10,6 +10,9 @@
 #include <stdint.h>
 
 #include <lib/psci/psci.h>
+#if defined(SPD_spmd)
+ #include <services/spm_core_manifest.h>
+#endif
 
 /*******************************************************************************
  * Forward declarations
@@ -272,7 +275,11 @@ const struct spm_mm_boot_info *plat_get_secure_partition_boot_info(
 int plat_spm_sp_rd_load(struct sp_res_desc *rd, const void *ptr, size_t size);
 int plat_spm_sp_get_next_address(void **sp_base, size_t *sp_size,
 				 void **rd_base, size_t *rd_size);
-
+#if defined(SPD_spmd)
+int plat_spm_core_manifest_load(spmc_manifest_sect_attribute_t *manifest,
+				const void *ptr,
+				size_t size);
+#endif
 /*******************************************************************************
  * Mandatory BL image load functions(may be overridden).
  ******************************************************************************/

include/services/spm_core_manifest.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SPMC_MANIFEST_H
+#define SPMC_MANIFEST_H
+
+#include <stdint.h>
+
+/*******************************************************************************
+ * Attribute Section
+ ******************************************************************************/
+
+typedef struct spm_core_manifest_sect_attribute {
+	/*
+	 * SPCI version (mandatory).
+	 */
+	uint32_t major_version;
+	uint32_t minor_version;
+
+	/*
+	 * Run-Time Exception Level (mandatory):
+	 * - 1: SEL1
+	 * - 2: SEL2
+	 */
+	uint32_t runtime_el;
+
+	/*
+	 * Run-Time Execution state (optional):
+	 * - 0: AArch64 (default)
+	 * - 1: AArch32
+	 */
+	uint32_t exec_state;
+
+	/*
+	 * Address of binary image containing SPM core in bytes (optional).
+	 */
+	uint64_t load_address;
+
+	/*
+	 * Offset from the base of the partition's binary image to the entry
+	 * point of the partition.
+	 */
+	uint64_t entrypoint;
+
+	/*
+	 * Size of binary image containing SPM core in bytes (mandatory).
+	 */
+	uint32_t binary_size;
+
+} spmc_manifest_sect_attribute_t;
+
+#endif /* SPMC_MANIFEST_H */

plat/arm/board/fvp/fdts/fvp_spmc_manifest.dts

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+/dts-v1/;
+
+/ {
+	compatible = "spci-core-manifest-1.0";
+
+	attribute {
+		maj_ver = <0x0>;
+		min_ver = <0x9>;
+		runtime_el = <0x1>;
+		exec_state = <0x0>;
+		load_address = <0x0 0x6000000>;
+		entrypoint = <0x0 0x6000000>;
+	};
+};

plat/arm/board/fvp/platform.mk

@@ -224,6 +224,14 @@ FVP_TOS_FW_CONFIG	:=	${BUILD_PLAT}/fdts/${PLAT}_tsp_fw_config.dtb
 $(eval $(call TOOL_ADD_PAYLOAD,${FVP_TOS_FW_CONFIG},--tos-fw-config))
 endif
 
+ifeq (${SPD},spmd)
+FDT_SOURCES		+=	plat/arm/board/fvp/fdts/${PLAT}_spmc_manifest.dts
+FVP_TOS_FW_CONFIG	:=	${BUILD_PLAT}/fdts/${PLAT}_spmc_manifest.dtb
+
+# Add the TOS_FW_CONFIG to FIP and specify the same to certtool
+$(eval $(call TOOL_ADD_PAYLOAD,${FVP_TOS_FW_CONFIG},--tos-fw-config))
+endif
+
 # Add the TB_FW_CONFIG to FIP and specify the same to certtool
 $(eval $(call TOOL_ADD_PAYLOAD,${FVP_TB_FW_CONFIG},--tb-fw-config))
 # Add the SOC_FW_CONFIG to FIP and specify the same to certtool

plat/arm/common/arm_dyn_cfg.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -197,8 +197,8 @@ void arm_bl2_dyn_cfg_init(void)
 			HW_CONFIG_ID,
 			SOC_FW_CONFIG_ID,
 			NT_FW_CONFIG_ID,
-#ifdef SPD_tspd
-			/* Currently tos_fw_config is only present for TSP */
+#if defined(SPD_tspd) || defined(SPD_spmd)
+			/* tos_fw_config is only present for TSPD/SPMD */
 			TOS_FW_CONFIG_ID
 #endif
 	};

plat/common/plat_spmd_manifest.c

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <libfdt.h>
+
+#include <common/debug.h>
+#include <common/fdt_wrappers.h>
+#include <errno.h>
+#include <platform_def.h>
+#include <services/spm_core_manifest.h>
+
+/*******************************************************************************
+ * Attribute section handler
+ ******************************************************************************/
+static int manifest_parse_attribute(spmc_manifest_sect_attribute_t *attr,
+				    const void *fdt,
+				    int node)
+{
+	int rc = 0;
+
+	assert(attr && fdt);
+
+	rc = fdtw_read_cells(fdt, node, "maj_ver", 1, &attr->major_version);
+	if (rc) {
+		ERROR("Missing SPCI major version in SPM core manifest.\n");
+		return -ENOENT;
+	}
+
+	rc = fdtw_read_cells(fdt, node, "min_ver", 1, &attr->minor_version);
+	if (rc) {
+		ERROR("Missing SPCI minor version in SPM core manifest.\n");
+		return -ENOENT;
+	}
+
+	rc = fdtw_read_cells(fdt, node, "runtime_el", 1, &attr->runtime_el);
+	if (rc) {
+		ERROR("Missing SPM core runtime EL in manifest.\n");
+		return -ENOENT;
+	}
+
+	rc = fdtw_read_cells(fdt, node, "exec_state", 1, &attr->exec_state);
+	if (rc)
+		NOTICE("Execution state not specified in SPM core manifest.\n");
+
+	rc = fdtw_read_cells(fdt, node, "binary_size", 1, &attr->binary_size);
+	if (rc)
+		NOTICE("Binary size not specified in SPM core manifest.\n");
+
+	rc = fdtw_read_cells(fdt, node, "load_address", 2, &attr->load_address);
+	if (rc)
+		NOTICE("Load address not specified in SPM core manifest.\n");
+
+	rc = fdtw_read_cells(fdt, node, "entrypoint", 2, &attr->entrypoint);
+	if (rc)
+		NOTICE("Entrypoint not specified in SPM core manifest.\n");
+
+	VERBOSE("SPM core manifest attribute section:\n");
+	VERBOSE("  version: %x.%x\n", attr->major_version, attr->minor_version);
+	VERBOSE("  runtime_el: 0x%x\n", attr->runtime_el);
+	VERBOSE("  binary_size: 0x%x\n", attr->binary_size);
+	VERBOSE("  load_address: 0x%llx\n", attr->load_address);
+	VERBOSE("  entrypoint: 0x%llx\n", attr->entrypoint);
+
+	return 0;
+}
+
+/*******************************************************************************
+ * Root node handler
+ ******************************************************************************/
+static int manifest_parse_root(spmc_manifest_sect_attribute_t *manifest,
+				const void *fdt,
+				int root)
+{
+	int node;
+	char *str;
+
+	str = "attribute";
+	node = fdt_subnode_offset_namelen(fdt, root, str, strlen(str));
+	if (node < 0) {
+		ERROR("Root node doesn't contain subnode '%s'\n", str);
+		return -ENOENT;
+	}
+
+	return manifest_parse_attribute(manifest, fdt, node);
+}
+
+/*******************************************************************************
+ * Platform handler to parse a SPM core manifest.
+ ******************************************************************************/
+int plat_spm_core_manifest_load(spmc_manifest_sect_attribute_t *manifest,
+				const void *ptr,
+				size_t size)
+{
+	int rc;
+	int root_node;
+
+	assert(manifest != NULL);
+	assert(ptr != NULL);
+
+	INFO("Reading SPM core manifest at address %p\n", ptr);
+
+	rc = fdt_check_header(ptr);
+	if (rc != 0) {
+		ERROR("Wrong format for SPM core manifest (%d).\n", rc);
+		return -EINVAL;
+	}
+
+	INFO("Reading SPM core manifest at address %p\n", ptr);
+
+	root_node = fdt_node_offset_by_compatible(ptr, -1,
+				"arm,spci-core-manifest-1.0");
+	if (root_node < 0) {
+		ERROR("Unrecognized SPM core manifest\n");
+		return -ENOENT;
+	}
+
+	INFO("Reading SPM core manifest at address %p\n", ptr);
+	return manifest_parse_root(manifest, ptr, root_node);
+}