From: Igor Opaniuk igor.opaniuk@foundries.io
This adds support for RPC test trusted application emulation, which permits to test reverse RPC calls to TEE supplicant. Currently it covers requests to the I2C bus from TEE.
Signed-off-by: Igor Opaniuk igor.opaniuk@foundries.io --- drivers/tee/Makefile | 2 + drivers/tee/optee/Kconfig | 9 +++ drivers/tee/sandbox.c | 137 +++++++++++++++++++++++++++++++- include/tee/optee_ta_rpc_test.h | 28 +++++++ 4 files changed, 172 insertions(+), 4 deletions(-) create mode 100644 include/tee/optee_ta_rpc_test.h
diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile index 5c8ffdbce8..ff844195ae 100644 --- a/drivers/tee/Makefile +++ b/drivers/tee/Makefile @@ -2,5 +2,7 @@
obj-y += tee-uclass.o obj-$(CONFIG_SANDBOX) += sandbox.o +obj-$(CONFIG_OPTEE_TA_RPC_TEST) += optee/supplicant.o +obj-$(CONFIG_OPTEE_TA_RPC_TEST) += optee/i2c.o obj-$(CONFIG_OPTEE) += optee/ obj-y += broadcom/ diff --git a/drivers/tee/optee/Kconfig b/drivers/tee/optee/Kconfig index d489834df9..65622f30b1 100644 --- a/drivers/tee/optee/Kconfig +++ b/drivers/tee/optee/Kconfig @@ -22,6 +22,15 @@ config OPTEE_TA_AVB The TA can support the "avb" subcommands "read_rb", "write"rb" and "is_unlocked".
+config OPTEE_TA_RPC_TEST + bool "Support RPC TEST TA" + depends on SANDBOX_TEE + default y + help + Enables support for RPC test trusted application emulation, which + permits to test reverse RPC calls to TEE supplicant. Should + be used only in sandbox env. + endmenu
endif diff --git a/drivers/tee/sandbox.c b/drivers/tee/sandbox.c index 4b91e7db1b..1cacd443f4 100644 --- a/drivers/tee/sandbox.c +++ b/drivers/tee/sandbox.c @@ -7,11 +7,15 @@ #include <sandboxtee.h> #include <tee.h> #include <tee/optee_ta_avb.h> +#include <tee/optee_ta_rpc_test.h> + +#include "optee/optee_msg.h" +#include "optee/optee_private.h"
/* * The sandbox tee driver tries to emulate a generic Trusted Exectution - * Environment (TEE) with the Trusted Application (TA) OPTEE_TA_AVB - * available. + * Environment (TEE) with the Trusted Applications (TA) OPTEE_TA_AVB and + * OPTEE_TA_RPC_TEST available. */
static const u32 pstorage_max = 16; @@ -32,7 +36,32 @@ struct ta_entry { struct tee_param *params); };
-#ifdef CONFIG_OPTEE_TA_AVB +static int get_msg_arg(struct udevice *dev, uint num_params, + struct tee_shm **shmp, struct optee_msg_arg **msg_arg) +{ + int rc; + struct optee_msg_arg *ma; + + rc = __tee_shm_add(dev, OPTEE_MSG_NONCONTIG_PAGE_SIZE, NULL, + OPTEE_MSG_GET_ARG_SIZE(num_params), TEE_SHM_ALLOC, + shmp); + if (rc) + return rc; + + ma = (*shmp)->addr; + memset(ma, 0, OPTEE_MSG_GET_ARG_SIZE(num_params)); + ma->num_params = num_params; + *msg_arg = ma; + + return 0; +} + +inline void *optee_alloc_and_init_page_list(void *buf, ulong len, + u64 *phys_buf_ptr) +{ + return 0; +} + static u32 get_attr(uint n, uint num_params, struct tee_param *params) { if (n >= num_params) @@ -63,6 +92,7 @@ bad_params: return TEE_ERROR_BAD_PARAMETERS; }
+#ifdef CONFIG_OPTEE_TA_AVB static u32 ta_avb_open_session(struct udevice *dev, uint num_params, struct tee_param *params) { @@ -214,7 +244,100 @@ static u32 ta_avb_invoke_func(struct udevice *dev, u32 func, uint num_params, return TEE_ERROR_NOT_SUPPORTED; } } -#endif /*OPTEE_TA_AVB*/ +#endif /* OPTEE_TA_AVB */ + +#ifdef CONFIG_OPTEE_TA_RPC_TEST +static u32 ta_rpc_test_open_session(struct udevice *dev, uint num_params, + struct tee_param *params) +{ + /* + * We don't expect additional parameters when opening a session to + * this TA. + */ + return check_params(TEE_PARAM_ATTR_TYPE_NONE, TEE_PARAM_ATTR_TYPE_NONE, + TEE_PARAM_ATTR_TYPE_NONE, TEE_PARAM_ATTR_TYPE_NONE, + num_params, params); +} + +static void fill_i2c_rpc_params(struct optee_msg_arg *msg_arg, u64 bus_num, + u64 chip_addr, u64 op, + struct tee_param_memref memref) +{ + msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT; + msg_arg->params[1].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT; + msg_arg->params[2].attr = OPTEE_MSG_ATTR_TYPE_RMEM_INOUT; + msg_arg->params[3].attr = OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT; + + /* trigger I2C services of TEE supplicant */ + msg_arg->cmd = OPTEE_MSG_RPC_CMD_I2C_TRANSFER; + + msg_arg->params[0].u.value.a = op; + msg_arg->params[0].u.value.b = bus_num; + msg_arg->params[0].u.value.c = chip_addr; + + /* buffer to read/write data */ + msg_arg->params[2].u.rmem.shm_ref = (ulong)memref.shm; + msg_arg->params[2].u.rmem.size = memref.size; + msg_arg->params[2].u.rmem.offs = memref.shm_offs; + + msg_arg->num_params = 4; +} + +static u32 ta_rpc_test_invoke_func(struct udevice *dev, u32 func, + uint num_params, + struct tee_param *params) +{ + struct tee_shm *shm; + struct tee_param_memref memref_data; + struct optee_msg_arg *msg_arg; + int chip_addr, bus_num, op; + int res; + + res = check_params(TEE_PARAM_ATTR_TYPE_VALUE_INPUT, + TEE_PARAM_ATTR_TYPE_MEMREF_INOUT, + TEE_PARAM_ATTR_TYPE_NONE, + TEE_PARAM_ATTR_TYPE_NONE, + num_params, params); + if (res) + return TEE_ERROR_BAD_PARAMETERS; + + bus_num = params[0].u.value.a; + chip_addr = params[0].u.value.b; + memref_data = params[1].u.memref; + + switch (func) { + case TA_RPC_TEST_CMD_I2C_READ: + op = OPTEE_MSG_RPC_CMD_I2C_TRANSFER_RD; + break; + case TA_RPC_TEST_CMD_I2C_WRITE: + op = OPTEE_MSG_RPC_CMD_I2C_TRANSFER_WR; + break; + default: + return TEE_ERROR_NOT_SUPPORTED; + } + + /* + * Fill params for an RPC call to tee supplicant + */ + res = get_msg_arg(dev, 4, &shm, &msg_arg); + if (res) + goto bad; + + fill_i2c_rpc_params(msg_arg, bus_num, chip_addr, op, memref_data); + + /* Make an RPC call to tee supplicant */ + optee_suppl_cmd(dev, shm, 0); + res = msg_arg->ret; + +bad: + tee_shm_free(shm); + + if (res) + return res; + + return TEE_SUCCESS; +} +#endif /* CONFIG_OPTEE_TA_RPC_TEST */
static const struct ta_entry ta_entries[] = { #ifdef CONFIG_OPTEE_TA_AVB @@ -223,6 +346,12 @@ static const struct ta_entry ta_entries[] = { .invoke_func = ta_avb_invoke_func, }, #endif +#ifdef CONFIG_OPTEE_TA_RPC_TEST + { .uuid = TA_RPC_TEST_UUID, + .open_session = ta_rpc_test_open_session, + .invoke_func = ta_rpc_test_invoke_func, + }, +#endif };
static void sandbox_tee_get_version(struct udevice *dev, diff --git a/include/tee/optee_ta_rpc_test.h b/include/tee/optee_ta_rpc_test.h new file mode 100644 index 0000000000..cae2fb04b4 --- /dev/null +++ b/include/tee/optee_ta_rpc_test.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* Copyright (c) 2020 Foundries Ltd */ + +#ifndef __TA_RPC_TEST_H +#define __TA_RPC_TEST_H + +#define TA_RPC_TEST_UUID { 0x48420575, 0x96ca, 0x401a, \ + { 0x89, 0x91, 0x1e, 0xfd, 0xce, 0xbd, 0x7d, 0x04 } } + +/* + * Does a reverse RPC call for I2C read + * + * in params[0].value.a: bus number + * in params[0].value.b: chip address + * inout params[1].u.memref: buffer to read data + */ +#define TA_RPC_TEST_CMD_I2C_READ 0 + +/* + * Does a reverse RPC call for I2C write + * + * in params[0].value.a: bus number + * in params[0].value.b: chip address + * inout params[1].u.memref: buffer with data to write + */ +#define TA_RPC_TEST_CMD_I2C_WRITE 1 + +#endif /* __TA_RPC_TEST_H */