efi_selftest: unit test for RISCV_EFI_BOOT_PROTOCOL

Add a test for the RISCV_EFI_BOOT_PROTOCOL.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>

lib/efi_selftest/Makefile

@@ -64,6 +64,7 @@ obj-$(CONFIG_EFI_LOADER_HII) += efi_selftest_hii.o
 obj-$(CONFIG_EFI_RNG_PROTOCOL) += efi_selftest_rng.o
 obj-$(CONFIG_EFI_GET_TIME) += efi_selftest_rtc.o
 obj-$(CONFIG_EFI_TCG2_PROTOCOL) += efi_selftest_tcg2.o
+obj-$(CONFIG_EFI_RISCV_BOOT_PROTOCOL) += efi_selftest_riscv.o
 
 ifeq ($(CONFIG_GENERATE_ACPI_TABLE),)
 obj-y += efi_selftest_fdt.o

lib/efi_selftest/efi_selftest_riscv.c

@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * efi_selftest_riscv
+ *
+ * Copyright (c) 2022 Ventana Micro Systems Inc
+ *
+ * Test the RISCV_EFI_BOOT_PROTOCOL.
+ *
+ * The following services are tested:
+ * get_boot_hartid
+ */
+
+#include <efi_selftest.h>
+#include <efi_riscv.h>
+#include <linux/libfdt.h>
+
+static const struct efi_system_table *systemtab;
+static const struct efi_boot_services *boottime;
+static const char *fdt;
+static const efi_guid_t riscv_efi_boot_protocol_guid = RISCV_EFI_BOOT_PROTOCOL_GUID;
+static const efi_guid_t fdt_guid = EFI_FDT_GUID;
+
+/**
+ * efi_st_get_config_table() - get configuration table
+ *
+ * @guid:	GUID of the configuration table
+ * Return:	pointer to configuration table or NULL
+ */
+static void *efi_st_get_config_table(const efi_guid_t *guid)
+{
+	size_t i;
+
+	for (i = 0; i < systab.nr_tables; i++) {
+		if (!guidcmp(guid, &systemtab->tables[i].guid))
+			return systemtab->tables[i].table;
+	}
+	return NULL;
+}
+
+/*
+ * Setup unit test.
+ *
+ * @handle:	handle of the loaded image
+ * @systable:	system table
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int setup(const efi_handle_t img_handle,
+		 const struct efi_system_table *systable)
+{
+	systemtab = systable;
+	boottime = systable->boottime;
+
+	fdt = efi_st_get_config_table(&fdt_guid);
+
+	if (!fdt) {
+		efi_st_error("Missing device tree\n");
+		return EFI_ST_FAILURE;
+	}
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Execute unit test.
+ *
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int execute(void)
+{
+	efi_status_t ret;
+	struct riscv_efi_boot_protocol *prot;
+	efi_uintn_t efi_hartid, fdt_hartid;
+	int chosen_node, len;
+	const fdt32_t *prop;
+
+	/* Get riscv boot protocol */
+	ret = boottime->locate_protocol(&riscv_efi_boot_protocol_guid, NULL,
+					(void **)&prot);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("RISC-V Boot Protocol not available\n");
+		return EFI_ST_FAILURE;
+	}
+
+	/* Get Boot Hart ID from EFI protocol */
+	ret = prot->get_boot_hartid(prot, &efi_hartid);
+	if (ret != EFI_SUCCESS) {
+		efi_st_error("Could not retrieve boot hart ID\n");
+		return EFI_ST_FAILURE;
+	}
+
+	/* Get Boot Hart ID from FDT */
+	chosen_node = fdt_path_offset(fdt, "/chosen");
+	if (chosen_node < 0) {
+		efi_st_error("/chosen node not found\n");
+		return EFI_ST_FAILURE;
+	}
+
+	prop = fdt_getprop((void *)fdt, chosen_node, "boot-hartid", &len);
+	if (!prop || len != sizeof(u32)) {
+		efi_st_error("boot-hartid not found\n");
+		return EFI_ST_FAILURE;
+	}
+
+	fdt_hartid = fdt32_to_cpu(*prop);
+
+	/* Boot Hart ID should be same */
+	if (efi_hartid != fdt_hartid) {
+		efi_st_error("boot-hartid is not same in EFI and FDT\n");
+		return EFI_ST_FAILURE;
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(riscv) = {
+	.name = "riscv",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = setup,
+	.execute = execute,
+};