Add a remoteproc TEE (Trusted Execution Environment) driver
that will be probed by the TEE bus. If the associated Trusted
application is supported on secure part this driver offers a client
interface to load a firmware by the secure part.
This firmware could be authenticated by the secure trusted application.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliq...@foss.st.com>
---
Updates vs version v13:
- define REMOTEPROC_TEE as bool instead of tristate,
- remove the load of the firmware in rproc_tee_parse_fw as we will ensure
that the firmware is loaded using the load_fw() operation.
---
drivers/remoteproc/Kconfig | 10 +
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/remoteproc_tee.c | 508 ++++++++++++++++++++++++++++
include/linux/remoteproc.h | 4 +
include/linux/remoteproc_tee.h | 105 ++++++
5 files changed, 628 insertions(+)
create mode 100644 drivers/remoteproc/remoteproc_tee.c
create mode 100644 include/linux/remoteproc_tee.h
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 955e4e38477e..f6335321d540 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -23,6 +23,16 @@ config REMOTEPROC_CDEV
It's safe to say N if you don't want to use this interface.
+config REMOTEPROC_TEE
+ bool "Remoteproc support by a TEE application"
+ depends on OPTEE
+ help
+ Support a remote processor with a TEE application. The Trusted
+ Execution Context is responsible for loading the trusted firmware
+ image and managing the remote processor's lifecycle.
+
+ It's safe to say N if you don't want to use remoteproc TEE.
+
config IMX_REMOTEPROC
tristate "i.MX remoteproc support"
depends on ARCH_MXC
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 5ff4e2fee4ab..f77e0abe8349 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -11,6 +11,7 @@ remoteproc-y += remoteproc_sysfs.o
remoteproc-y += remoteproc_virtio.o
remoteproc-y += remoteproc_elf_loader.o
obj-$(CONFIG_REMOTEPROC_CDEV) += remoteproc_cdev.o
+obj-$(CONFIG_REMOTEPROC_TEE) += remoteproc_tee.o
obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
obj-$(CONFIG_IMX_DSP_REMOTEPROC) += imx_dsp_rproc.o
obj-$(CONFIG_INGENIC_VPU_RPROC) += ingenic_rproc.o
diff --git a/drivers/remoteproc/remoteproc_tee.c
b/drivers/remoteproc/remoteproc_tee.c
new file mode 100644
index 000000000000..3fe3f31068f2
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_tee.c
@@ -0,0 +1,508 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) STMicroelectronics 2024
+ * Author: Arnaud Pouliquen <arnaud.pouliq...@foss.st.com>
+ */
+
+#include <linux/firmware.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/remoteproc.h>
+#include <linux/remoteproc_tee.h>
+#include <linux/slab.h>
+#include <linux/tee_drv.h>
+
+#define MAX_TEE_PARAM_ARRAY_MEMBER 4
+
+/*
+ * Authentication of the firmware and load in the remote processor memory
+ *
+ * [in] params[0].value.a: unique 32bit identifier of the remote processor
+ * [in] params[1].memref: buffer containing the image of the
buffer
+ */
+#define TA_RPROC_FW_CMD_LOAD_FW 1
+
+/*
+ * Start the remote processor
+ *
+ * [in] params[0].value.a: unique 32bit identifier of the remote processor
+ */
+#define TA_RPROC_FW_CMD_START_FW 2
+
+/*
+ * Stop the remote processor
+ *
+ * [in] params[0].value.a: unique 32bit identifier of the remote processor
+ */
+#define TA_RPROC_FW_CMD_STOP_FW 3
+
+/*
+ * Return the address of the resource table, or 0 if not found
+ * No check is done to verify that the address returned is accessible by
+ * the non secure context. If the resource table is loaded in a protected
+ * memory the access by the non secure context will lead to a data abort.
+ *
+ * [in] params[0].value.a: unique 32bit identifier of the remote processor
+ * [out] params[1].value.a: 32bit LSB resource table memory address
+ * [out] params[1].value.b: 32bit MSB resource table memory address
+ * [out] params[2].value.a: 32bit LSB resource table memory size
+ * [out] params[2].value.b: 32bit MSB resource table memory size
+ */
+#define TA_RPROC_FW_CMD_GET_RSC_TABLE 4
+
+/*
+ * Return the address of the core dump
+ *
+ * [in] params[0].value.a: unique 32bit identifier of the remote processor
+ * [out] params[1].memref: address of the core dump image if exist,
+ * else return Null
+ */
+#define TA_RPROC_FW_CMD_GET_COREDUMP 5
+
+/*
+ * Release remote processor firmware images and associated resources.
+ * This command should be used in case an error occurs between the loading of
+ * the firmware images (TA_RPROC_CMD_LOAD_FW) and the starting of the remote
+ * processor (TA_RPROC_CMD_START_FW) or after stopping the remote processor
+ * to release associated resources (TA_RPROC_CMD_STOP_FW).
+ *
+ * [in] params[0].value.a: Unique 32-bit remote processor identifier
+ */
+#define TA_RPROC_CMD_RELEASE_FW 6
+
+struct rproc_tee_context {
+ struct list_head sessions;
+ struct tee_context *tee_ctx;
+ struct device *dev;
+};
+
+static struct rproc_tee_context *rproc_tee_ctx;
+
+static void rproc_tee_prepare_args(struct rproc_tee *trproc, int cmd,
+ struct tee_ioctl_invoke_arg *arg,
+ struct tee_param *param,
+ unsigned int num_params)
+{
+ memset(arg, 0, sizeof(*arg));
+ memset(param, 0, MAX_TEE_PARAM_ARRAY_MEMBER * sizeof(*param));
+
+ arg->func = cmd;
+ arg->session = trproc->session_id;
+ arg->num_params = num_params + 1;
+
+ param[0] = (struct tee_param) {
+ .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT,
+ .u.value.a = trproc->rproc_id,
+ };
+}
+
+void rproc_tee_release_fw(struct rproc *rproc)
+{
+ struct tee_param param[MAX_TEE_PARAM_ARRAY_MEMBER];
+ struct rproc_tee *trproc = rproc->rproc_tee_itf;
+ struct tee_ioctl_invoke_arg arg;
+ int ret;
+
+ if (!rproc) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * If the remote processor state is RPROC_DETACHED, just ignore the
+ * request, as the remote processor is still running.
+ */
+ if (rproc->state == RPROC_DETACHED)
+ return;
+
+ if (rproc->state != RPROC_OFFLINE) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ rproc_tee_prepare_args(trproc, TA_RPROC_CMD_RELEASE_FW, &arg, param, 0);
+
+ ret = tee_client_invoke_func(rproc_tee_ctx->tee_ctx, &arg, param);
+ if (ret < 0 || arg.ret != 0) {
+ dev_err(rproc_tee_ctx->dev,
+ "TA_RPROC_CMD_RELEASE_FW invoke failed TEE err: %x,
ret:%x\n",
+ arg.ret, ret);
+ ret = -EIO;
+ }
+
+out:
+ if (ret)
+ /* Unexpected state without solution to come back in a stable
state */
+ dev_err(rproc_tee_ctx->dev, "Failed to release TEE remoteproc
firmware: %d\n", ret);
+}
+EXPORT_SYMBOL_GPL(rproc_tee_release_fw);
+
+int rproc_tee_load_fw(struct rproc *rproc, const struct firmware *fw)
+{
+ struct tee_param param[MAX_TEE_PARAM_ARRAY_MEMBER];
+ struct rproc_tee *trproc = rproc->rproc_tee_itf;
+ struct tee_ioctl_invoke_arg arg;
+ struct tee_shm *fw_shm;
+ int ret;
+
+ if (!trproc)
+ return -EINVAL;
+
+ fw_shm = tee_shm_register_kernel_buf(rproc_tee_ctx->tee_ctx, (void
*)fw->data, fw->size);
+ if (IS_ERR(fw_shm))
+ return PTR_ERR(fw_shm);
+
+ rproc_tee_prepare_args(trproc, TA_RPROC_FW_CMD_LOAD_FW, &arg, param, 1);
+
+ /* Provide the address of the firmware image */
+ param[1] = (struct tee_param) {
+ .attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT,
+ .u.memref = {
+ .shm = fw_shm,
+ .size = fw->size,
+ .shm_offs = 0,
+ },
+ };
+
+ ret = tee_client_invoke_func(rproc_tee_ctx->tee_ctx, &arg, param);
+ if (ret < 0 || arg.ret != 0) {
+ dev_err(rproc_tee_ctx->dev,
+ "TA_RPROC_FW_CMD_LOAD_FW invoke failed TEE err: %x,
ret:%x\n",
+ arg.ret, ret);
+ if (!ret)
+ ret = -EIO;
+ }
+
+ tee_shm_free(fw_shm);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rproc_tee_load_fw);
+
+static int rproc_tee_get_loaded_rsc_table(struct rproc *rproc, phys_addr_t
*rsc_pa,
+ size_t *table_sz)
+{
+ struct tee_param param[MAX_TEE_PARAM_ARRAY_MEMBER];
+ struct rproc_tee *trproc = rproc->rproc_tee_itf;
+ struct tee_ioctl_invoke_arg arg;
+ int ret;
+
+ if (!trproc)
+ return -EINVAL;
+
+ rproc_tee_prepare_args(trproc, TA_RPROC_FW_CMD_GET_RSC_TABLE, &arg,
param, 2);
+
+ param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT;
+ param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT;
+
+ ret = tee_client_invoke_func(rproc_tee_ctx->tee_ctx, &arg, param);
+ if (ret < 0 || arg.ret != 0) {
+ dev_err(rproc_tee_ctx->dev,
+ "TA_RPROC_FW_CMD_GET_RSC_TABLE invoke failed TEE err:
%x, ret:%x\n",
+ arg.ret, ret);
+ return -EIO;
+ }
+
+ *table_sz = param[2].u.value.a;
+
+ if (*table_sz)
+ *rsc_pa = param[1].u.value.a;
+ else
+ *rsc_pa = 0;
+
+ return 0;
+}
+
+int rproc_tee_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+ phys_addr_t rsc_table;
+ void __iomem *rsc_va;
+ size_t table_sz;
+ int ret;
+
+ if (!rproc)
+ return -EINVAL;
+
+ /* At this point, the firmware has to be loaded to be able to parse the
resource table. */
+
+ ret = rproc_tee_get_loaded_rsc_table(rproc, &rsc_table, &table_sz);
+ if (ret)
+ goto release_fw;
+
+ /*
+ * We assume here that the memory mapping is the same between the TEE
and Linux kernel
+ * contexts. Else a new TEE remoteproc service could be needed to get a
copy of the
+ * resource table
+ */
+ rsc_va = ioremap_wc(rsc_table, table_sz);
+ if (IS_ERR_OR_NULL(rsc_va)) {
+ dev_err(rproc_tee_ctx->dev, "Unable to map memory region:
%pa+%zx\n",
+ &rsc_table, table_sz);
+ ret = -ENOMEM;
+ goto release_fw;
+ }
+
+ /*
+ * Create a copy of the resource table to have the same behavior as the
ELF loader.
+ * This cached table will be used by the remoteproc core after the
remoteproc stops
+ * to free resources and for crash recovery to reapply the settings.
+ * The cached table will be freed by the remoteproc core.
+ */
+ rproc->cached_table = kmemdup((__force void *)rsc_va, table_sz,
GFP_KERNEL);
+ iounmap(rsc_va);
+
+ if (!rproc->cached_table) {
+ ret = -ENOMEM;
+ goto release_fw;
+ }
+
+ rproc->table_ptr = rproc->cached_table;
+ rproc->table_sz = table_sz;
+
+ return 0;
+
+release_fw:
+ rproc_tee_release_fw(rproc);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rproc_tee_parse_fw);
+
+struct resource_table *rproc_tee_find_loaded_rsc_table(struct rproc *rproc,
+ const struct firmware
*fw)
+{
+ phys_addr_t rsc_table;
+ size_t table_sz;
+ int ret;
+
+ ret = rproc_tee_get_loaded_rsc_table(rproc, &rsc_table, &table_sz);
+ if (ret)
+ return NULL;
+
+ rproc->table_sz = table_sz;
+ if (!table_sz)
+ return NULL;
+
+ /*
+ * At this step the memory area that contains the resource table should
have been registered
+ * by the remote proc platform driver and allocated by
rproc_alloc_registered_carveouts().
+ */
+ return (struct resource_table *)rproc_pa_to_va(rproc, rsc_table,
table_sz, NULL);
+}
+EXPORT_SYMBOL_GPL(rproc_tee_find_loaded_rsc_table);
+
+int rproc_tee_start(struct rproc *rproc)
+{
+ struct tee_param param[MAX_TEE_PARAM_ARRAY_MEMBER];
+ struct rproc_tee *trproc = rproc->rproc_tee_itf;
+ struct tee_ioctl_invoke_arg arg;
+ int ret = 0;
+
+ if (!trproc)
+ return -EINVAL;
+
+ rproc_tee_prepare_args(trproc, TA_RPROC_FW_CMD_START_FW, &arg, param,
0);
+
+ ret = tee_client_invoke_func(rproc_tee_ctx->tee_ctx, &arg, param);
+ if (ret < 0 || arg.ret != 0) {
+ dev_err(rproc_tee_ctx->dev,
+ "TA_RPROC_FW_CMD_START_FW invoke failed TEE err: %x,
ret:%x\n",
+ arg.ret, ret);
+ if (!ret)
+ return -EIO;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rproc_tee_start);
+
+int rproc_tee_stop(struct rproc *rproc)
+{
+ struct tee_param param[MAX_TEE_PARAM_ARRAY_MEMBER];
+ struct rproc_tee *trproc = rproc->rproc_tee_itf;
+ struct tee_ioctl_invoke_arg arg;
+ int ret;
+
+ if (!trproc)
+ return -EINVAL;
+
+ rproc_tee_prepare_args(trproc, TA_RPROC_FW_CMD_STOP_FW, &arg, param, 0);
+
+ ret = tee_client_invoke_func(rproc_tee_ctx->tee_ctx, &arg, param);
+ if (ret < 0 || arg.ret != 0) {
+ dev_err(rproc_tee_ctx->dev,
+ "TA_RPROC_FW_CMD_STOP_FW invoke failed TEE err: %x,
ret:%x\n",
+ arg.ret, ret);
+ if (!ret)
+ ret = -EIO;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rproc_tee_stop);
+
+static const struct tee_client_device_id rproc_tee_id_table[] = {
+ {UUID_INIT(0x80a4c275, 0x0a47, 0x4905, 0x82, 0x85, 0x14, 0x86, 0xa9,
0x77, 0x1a, 0x08)},
+ {}
+};
+
+int rproc_tee_register(struct device *dev, struct rproc *rproc, unsigned int
rproc_id)
+{
+ struct tee_param param[MAX_TEE_PARAM_ARRAY_MEMBER];
+ struct tee_ioctl_open_session_arg sess_arg;
+ struct tee_client_device *tee_device;
+ struct rproc_tee *trproc;
+ int ret;
+
+ /*
+ * Test if the device has been probed by the TEE bus. In case of
failure, we ignore the
+ * reason. The bus could be not yet probed or the service not available
in the secure
+ * firmware.The assumption in such a case is that the TEE remoteproc is
not probed.
+ */
+ if (!rproc_tee_ctx)
+ return -EPROBE_DEFER;
+
+ /* Prevent rproc tee module from being removed */
+ if (!try_module_get(THIS_MODULE)) {
+ dev_err(rproc_tee_ctx->dev, "can't get owner\n");
+ return -ENODEV;
+ }
+
+ trproc = devm_kzalloc(dev, sizeof(*trproc), GFP_KERNEL);
+ if (!trproc) {
+ ret = -ENOMEM;
+ goto module_put;
+ }
+
+ tee_device = to_tee_client_device(rproc_tee_ctx->dev);
+ memset(&sess_arg, 0, sizeof(sess_arg));
+
+ memcpy(sess_arg.uuid, tee_device->id.uuid.b, TEE_IOCTL_UUID_LEN);
+
+ sess_arg.clnt_login = TEE_IOCTL_LOGIN_REE_KERNEL;
+ sess_arg.num_params = 1;
+
+ param[0] = (struct tee_param) {
+ .attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT,
+ .u.value.a = rproc_id,
+ };
+
+ ret = tee_client_open_session(rproc_tee_ctx->tee_ctx, &sess_arg, param);
+ if (ret < 0 || sess_arg.ret != 0) {
+ dev_err(dev, "tee_client_open_session failed, err: %x\n",
sess_arg.ret);
+ ret = -EINVAL;
+ goto module_put;
+ }
+
+ trproc->parent = dev;
+ trproc->rproc_id = rproc_id;
+ trproc->session_id = sess_arg.session;
+
+ trproc->rproc = rproc;
+ rproc->rproc_tee_itf = trproc;
+
+ list_add_tail(&trproc->node, &rproc_tee_ctx->sessions);
+
+ return 0;
+
+module_put:
+ module_put(THIS_MODULE);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rproc_tee_register);
+
+int rproc_tee_unregister(struct rproc *rproc)
+{
+ struct rproc_tee *trproc = rproc->rproc_tee_itf;
+ int ret;
+
+ if (!rproc->rproc_tee_itf)
+ return -ENODEV;
+
+ ret = tee_client_close_session(rproc_tee_ctx->tee_ctx,
trproc->session_id);
+ if (ret < 0)
+ dev_err(trproc->parent, "tee_client_close_session failed, err:
%x\n", ret);
+
+ list_del(&trproc->node);
+ rproc->rproc_tee_itf = NULL;
+
+ module_put(THIS_MODULE);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rproc_tee_unregister);
+
+static int rproc_tee_ctx_match(struct tee_ioctl_version_data *ver, const void
*data)
+{
+ /* Today we support only the OP-TEE, could be extend to other tees */
+ return (ver->impl_id == TEE_IMPL_ID_OPTEE);
+}
+
+static int rproc_tee_probe(struct device *dev)
+{
+ struct tee_context *tee_ctx;
+ int ret;
+
+ /* Open context with TEE driver */
+ tee_ctx = tee_client_open_context(NULL, rproc_tee_ctx_match, NULL,
NULL);
+ if (IS_ERR(tee_ctx))
+ return PTR_ERR(tee_ctx);
+
+ rproc_tee_ctx = devm_kzalloc(dev, sizeof(*rproc_tee_ctx), GFP_KERNEL);
+ if (!rproc_tee_ctx) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ rproc_tee_ctx->dev = dev;
+ rproc_tee_ctx->tee_ctx = tee_ctx;
+ INIT_LIST_HEAD(&rproc_tee_ctx->sessions);
+
+ return 0;
+err:
+ tee_client_close_context(tee_ctx);
+
+ return ret;
+}
+
+static int rproc_tee_remove(struct device *dev)
+{
+ struct rproc_tee *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &rproc_tee_ctx->sessions, node) {
+ tee_client_close_session(rproc_tee_ctx->tee_ctx,
entry->session_id);
+ list_del(&entry->node);
+ kfree(entry);
+ }
+
+ tee_client_close_context(rproc_tee_ctx->tee_ctx);
+
+ return 0;
+}
+
+MODULE_DEVICE_TABLE(tee, rproc_tee_id_table);
+
+static struct tee_client_driver rproc_tee_fw_driver = {
+ .id_table = rproc_tee_id_table,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .bus = &tee_bus_type,
+ .probe = rproc_tee_probe,
+ .remove = rproc_tee_remove,
+ },
+};
+
+static int __init rproc_tee_fw_mod_init(void)
+{
+ return driver_register(&rproc_tee_fw_driver.driver);
+}
+
+static void __exit rproc_tee_fw_mod_exit(void)
+{
+ driver_unregister(&rproc_tee_fw_driver.driver);
+}
+
+module_init(rproc_tee_fw_mod_init);
+module_exit(rproc_tee_fw_mod_exit);
+
+MODULE_DESCRIPTION(" remote processor TEE module");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 8fd0d7f63c8e..2e0ddcb2d792 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -503,6 +503,8 @@ enum rproc_features {
RPROC_MAX_FEATURES,
};
+struct rproc_tee;
+
/**
* struct rproc - represents a physical remote processor device
* @node: list node of this rproc object
@@ -545,6 +547,7 @@ enum rproc_features {
* @cdev: character device of the rproc
* @cdev_put_on_release: flag to indicate if remoteproc should be shutdown on
@char_dev release
* @features: indicate remoteproc features
+ * @rproc_tee_itf: pointer to the remoteproc tee context
*/
struct rproc {
struct list_head node;
@@ -586,6 +589,7 @@ struct rproc {
struct cdev cdev;
bool cdev_put_on_release;
DECLARE_BITMAP(features, RPROC_MAX_FEATURES);
+ struct rproc_tee *rproc_tee_itf;
};
/**
diff --git a/include/linux/remoteproc_tee.h b/include/linux/remoteproc_tee.h
new file mode 100644
index 000000000000..9b498a8eff4d
--- /dev/null
+++ b/include/linux/remoteproc_tee.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright(c) 2024 STMicroelectronics
+ */
+
+#ifndef REMOTEPROC_TEE_H
+#define REMOTEPROC_TEE_H
+
+#include <linux/tee_drv.h>
+#include <linux/firmware.h>
+#include <linux/remoteproc.h>
+
+struct rproc;
+
+/**
+ * struct rproc_tee - TEE remoteproc structure
+ * @node: Reference in list
+ * @rproc: Remoteproc reference
+ * @parent: Parent device
+ * @rproc_id: Identifier of the target firmware
+ * @session_id: TEE session identifier
+ */
+struct rproc_tee {
+ struct list_head node;
+ struct rproc *rproc;
+ struct device *parent;
+ u32 rproc_id;
+ u32 session_id;
+};
+
+#if IS_REACHABLE(CONFIG_REMOTEPROC_TEE)
+
+int rproc_tee_register(struct device *dev, struct rproc *rproc, unsigned int
rproc_id);
+int rproc_tee_unregister(struct rproc *rproc);
+int rproc_tee_parse_fw(struct rproc *rproc, const struct firmware *fw);
+int rproc_tee_load_fw(struct rproc *rproc, const struct firmware *fw);
+void rproc_tee_release_fw(struct rproc *rproc);
+struct resource_table *rproc_tee_find_loaded_rsc_table(struct rproc *rproc,
+ const struct firmware
*fw);
+int rproc_tee_start(struct rproc *rproc);
+int rproc_tee_stop(struct rproc *rproc);
+
+#else
+
+static inline int rproc_tee_register(struct device *dev, struct rproc *rproc,
unsigned int rproc_id)
+{
+ return -ENODEV;
+}
+
+static inline int rproc_tee_parse_fw(struct rproc *rproc, const struct
firmware *fw)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return 0;
+}
+
+static inline int rproc_tee_unregister(struct rproc *rproc)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return 0;
+}
+
+static inline int rproc_tee_load_fw(struct rproc *rproc, const struct
firmware *fw)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return 0;
+}
+
+static inline int rproc_tee_start(struct rproc *rproc)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return 0;
+}
+
+static inline int rproc_tee_stop(struct rproc *rproc)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return 0;
+}
+
+static inline void rproc_tee_release_fw(struct rproc *rproc)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+}
+
+static inline struct resource_table *
+rproc_tee_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return NULL;
+}
+#endif /* CONFIG_REMOTEPROC_TEE */
+#endif /* REMOTEPROC_TEE_H */
--
2.25.1
