arm_ffa: introduce sandbox FF-A support

Emulate Secure World's FF-A ABIs and allow testing U-Boot FF-A support

Features of the sandbox FF-A support:

- Introduce an FF-A emulator
- Introduce an FF-A device driver for FF-A comms with emulated Secure World
- Provides test methods allowing to read the status of the inspected ABIs

The sandbox FF-A emulator supports only 64-bit direct messaging.

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 72 insertions, 0 deletions

diff --git a/arch/sandbox/include/asm/sandbox_arm_ffa.h b/arch/sandbox/include/asm/sandbox_arm_ffa.h
new file mode 100644
index 00000000000..be2790f4960
--- /dev/null
+++ b/arch/sandbox/include/asm/sandbox_arm_ffa.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
+ *
+ * Authors:
+ *   Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
+ */
+
+#ifndef __SANDBOX_ARM_FFA_H
+#define __SANDBOX_ARM_FFA_H
+
+#include <arm_ffa.h>
+
+/*
+ * This header provides public sandbox FF-A emulator declarations
+ * and declarations needed by FF-A sandbox clients
+ */
+
+/* UUIDs strings of the emulated services */
+#define SANDBOX_SERVICE1_UUID	"ed32d533-4209-99e6-2d72-cdd998a79cc0"
+#define SANDBOX_SERVICE2_UUID	"ed32d544-4209-99e6-2d72-cdd998a79cc0"
+
+/* IDs of the emulated secure partitions (SPs) */
+#define SANDBOX_SP1_ID 0x1245
+#define SANDBOX_SP2_ID 0x9836
+#define SANDBOX_SP3_ID 0x6452
+#define SANDBOX_SP4_ID 0x7814
+
+/* Invalid service UUID (no matching SP) */
+#define SANDBOX_SERVICE3_UUID	"55d532ed-0942-e699-722d-c09ca798d9cd"
+
+/* Invalid service UUID (invalid UUID string format) */
+#define SANDBOX_SERVICE4_UUID	"32ed-0942-e699-722d-c09ca798d9cd"
+
+/* Number of valid services */
+#define SANDBOX_SP_COUNT_PER_VALID_SERVICE	2
+
+/**
+ * struct ffa_sandbox_data - query ABI state data structure
+ * @data0_size:	size of the first argument
+ * @data0:	pointer to the first argument
+ * @data1_size>:	size of the second argument
+ * @data1:	pointer to the second argument
+ *
+ * Used to pass various types of data with different sizes between
+ * the test cases and the sandbox emulator.
+ * The data is for querying FF-A ABIs state.
+ */
+struct ffa_sandbox_data {
+	u32 data0_size; /* size of the first argument */
+	void *data0; /* pointer to the first argument */
+	u32 data1_size; /* size of the second argument */
+	void *data1; /* pointer to the second argument */
+};
+
+/* The sandbox FF-A  emulator public functions */
+
+/**
+ * sandbox_query_ffa_emul_state() - Inspect the FF-A ABIs
+ * @queried_func_id:	The FF-A function to be queried
+ * @func_data:  Pointer to the FF-A function arguments container structure
+ *
+ * Query the status of FF-A ABI specified in the input argument.
+ *
+ * Return:
+ *
+ * 0 on success. Otherwise, failure
+ */
+int sandbox_query_ffa_emul_state(u32 queried_func_id,
+				 struct ffa_sandbox_data *func_data);
+
+#endif