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e3cf80fbe0
Add the basic 'hello world ta' command which increment of the value passed. This provides easy test for establishing a session with OP-TEE TA and verify. It includes following "hello world ta" subcommands: optee hello; default value '0' is passed and gets incremented. optee hello <value>; value to increment via OP-TEE HELLO WORLD TA. To enable the OP-TEE side HELLO WORLD example please refer https://optee.readthedocs.io/en/latest/building/gits/optee_examples/optee_examples.html Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com> Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) Copyright 2024, Advanced Micro Devices, Inc.
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*/
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#include <command.h>
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#include <errno.h>
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#include <tee.h>
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#include <vsprintf.h>
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#define TA_HELLO_WORLD_CMD_INC_VALUE 0
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/* This needs to match the UUID of the Hello World TA. */
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#define TA_HELLO_WORLD_UUID \
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{ 0x8aaaf200, 0x2450, 0x11e4, \
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{ 0xab, 0xe2, 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b} }
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static int hello_world_ta(unsigned int value)
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{
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const struct tee_optee_ta_uuid uuid = TA_HELLO_WORLD_UUID;
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struct tee_open_session_arg session_arg;
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struct udevice *tee = NULL;
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struct tee_invoke_arg arg;
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struct tee_param param[2];
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int rc;
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tee = tee_find_device(tee, NULL, NULL, NULL);
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if (!tee)
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return -ENODEV;
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memset(&session_arg, 0, sizeof(session_arg));
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tee_optee_ta_uuid_to_octets(session_arg.uuid, &uuid);
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rc = tee_open_session(tee, &session_arg, 0, NULL);
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if (rc) {
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printf("tee_open_session(): failed(%d)\n", rc);
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return rc;
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}
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arg.func = TA_HELLO_WORLD_CMD_INC_VALUE;
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arg.session = session_arg.session;
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param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INOUT;
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param[0].u.value.a = value;
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printf("Value before: 0x%x\n", (int)param[0].u.value.a);
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printf("Calling TA\n");
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tee_invoke_func(tee, &arg, 1, param);
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printf("Value after: 0x%x\n", (int)param[0].u.value.a);
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return tee_close_session(tee, session_arg.session);
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}
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static int do_optee_hello_world_ta(struct cmd_tbl *cmdtp, int flag, int argc,
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char * const argv[])
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{
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int ret, value = 0;
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if (strcmp(argv[1], NULL))
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value = hextoul(argv[1], NULL);
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ret = hello_world_ta(value);
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if (ret)
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return CMD_RET_FAILURE;
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return CMD_RET_SUCCESS;
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}
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U_BOOT_LONGHELP(optee,
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"hello [<value>] Invoke the OP-TEE 'Hello World' TA\n");
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U_BOOT_CMD_WITH_SUBCMDS(optee, "OP-TEE commands", optee_help_text,
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U_BOOT_SUBCMD_MKENT(hello, 2, 1, do_optee_hello_world_ta));
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