Good morning, On Thu, Nov 28, 2024 at 09:42:09AM +0100, Arnaud Pouliquen wrote: > 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.pouliquen@xxxxxxxxxxx> > --- > 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.pouliquen@xxxxxxxxxxx> > + */ > + > +#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) Now that you have switched to a "bool" in the Kconfig file, this should be IS_ENABLED(). > + > +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 >