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[209.85.220.41]) by mx.google.com with SMTPS id v66-v6sor518449lfd.209.2018.08.23.03.43.47 for (Google Transport Security); Thu, 23 Aug 2018 03:43:47 -0700 (PDT) Received-SPF: pass (google.com: domain of jens.wiklander@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=JM4drP2s; spf=pass (google.com: domain of jens.wiklander@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=jens.wiklander@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Jo5AZd02Y+bjS67y65cRzCoZHbABDV4iOsItsuZ4BW4=; b=JM4drP2sMJ6U3reaApumNwSgaz6iAtyIxQ+5f9JgM+x/YNzLq14gSdPESDo3U8nsgL nMDjYCRVMPOsvwpHiagCBWfxPUjYdVntO2/V2jH8HdXCrkAlPysS0Z3jJXBBPK8LrDuu 5Dvyj0KH8ekMGd72LQXWcrZ3TH87QaCHxg1e4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Jo5AZd02Y+bjS67y65cRzCoZHbABDV4iOsItsuZ4BW4=; b=qaKmjUVNPmqd8/oogM5q+SjQYb0DKfovscwpfJRGTFZH6CHPG814NSCYJjAQNHKHv9 Ei6Gv45u88oO4Oiwis9wa+0fKC4lboCo98jJrZ7KvLx56o17TDaMVibU7TOmwd3mXacv NLQdLNB/r2esnTeLSyHaYFdW5HzFajTvQ4AxF87N0oL22Xs0H96YkLGFMXsYIlECRdVB E6lGcThEGfh5SbwwZ+5cF1QJXc/JiWrndRansv9ljP47iGpH8cLvO7nYj05S/VwvTBwg ATO7n+QybCBm6wKP3MG7zs/t+aeNzI9MV/oHyM5oh9gdfNENhW4z2/RnFff8lKSvYQkp 4WGw== X-Gm-Message-State: AOUpUlFQZvc9dole29Ow5seYwuKSIKWel5ZEsi+XVPnQr9eBn4+C0eyy RAp0l3Ub//XRPiokyz3L/9HQcbRC X-Google-Smtp-Source: AA+uWPwR/mEamZkox6y/VTZjBgrTaT7MezXqJ2rx3rU5dJu+5SjR1ohpOHffmJPImjMXn3ALj3+h6Q== X-Received: by 2002:a19:c143:: with SMTP id r64-v6mr12436697lff.59.1535021027179; Thu, 23 Aug 2018 03:43:47 -0700 (PDT) Return-Path: Received: from jax.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y5-v6sm679771ljj.75.2018.08.23.03.43.45 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 Aug 2018 03:43:46 -0700 (PDT) From: Jens Wiklander To: u-boot@lists.denx.de Cc: Simon Glass , Igor Opaniuk , Tom Rini , Jaehoon Chung , Pierre Aubert , Albert Aribaud , Peter Griffin , Michal Simek , Jens Wiklander Subject: [PATCH v2 05/15] Add UCLASS_TEE for Trusted Execution Environment Date: Thu, 23 Aug 2018 12:43:24 +0200 Message-Id: <20180823104334.16083-6-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180823104334.16083-1-jens.wiklander@linaro.org> References: <20180823104334.16083-1-jens.wiklander@linaro.org> Adds a uclass to interface with a TEE (Trusted Execution Environment). A TEE driver is a driver that interfaces with a trusted OS running in some secure environment, for example, TrustZone on ARM cpus, or a separate secure co-processor etc. The TEE subsystem can serve a TEE driver for a Global Platform compliant TEE, but it's not limited to only Global Platform TEEs. The over all design is based on the TEE subsystem in the Linux kernel, tailored for U-boot. Tested-by: Igor Opaniuk Signed-off-by: Jens Wiklander --- MAINTAINERS | 6 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/tee/Kconfig | 8 ++ drivers/tee/Makefile | 3 + drivers/tee/tee-uclass.c | 192 ++++++++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/tee.h | 290 +++++++++++++++++++++++++++++++++++++++ 8 files changed, 503 insertions(+) create mode 100644 drivers/tee/Kconfig create mode 100644 drivers/tee/Makefile create mode 100644 drivers/tee/tee-uclass.c create mode 100644 include/tee.h -- 2.17.1 Reviewed-by: Simon Glass diff --git a/MAINTAINERS b/MAINTAINERS index 58b61ac05882..7458c606ee92 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -571,6 +571,12 @@ TQ GROUP S: Orphaned (Since 2016-02) T: git git://git.denx.de/u-boot-tq-group.git +TEE +M: Jens Wiklander +S: Maintained +F: drivers/tee/ +F: include/tee.h + UBI M: Kyungmin Park M: Heiko Schocher diff --git a/drivers/Kconfig b/drivers/Kconfig index c72abf893297..f3249ab1d143 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -94,6 +94,8 @@ source "drivers/spmi/Kconfig" source "drivers/sysreset/Kconfig" +source "drivers/tee/Kconfig" + source "drivers/thermal/Kconfig" source "drivers/timer/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index d53208540ea6..0fcae36f50f7 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -103,6 +103,7 @@ obj-y += smem/ obj-y += soc/ obj-$(CONFIG_REMOTEPROC) += remoteproc/ obj-y += thermal/ +obj-$(CONFIG_TEE) += tee/ obj-$(CONFIG_MACH_PIC32) += ddr/microchip/ endif diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig new file mode 100644 index 000000000000..817ab331b0f8 --- /dev/null +++ b/drivers/tee/Kconfig @@ -0,0 +1,8 @@ +# Generic Trusted Execution Environment Configuration +config TEE + bool "Trusted Execution Environment support" + depends on ARM && (ARM64 || CPU_V7A) + select ARM_SMCCC + help + This implements a generic interface towards a Trusted Execution + Environment (TEE). diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile new file mode 100644 index 000000000000..b6d8e16e6211 --- /dev/null +++ b/drivers/tee/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0+ + +obj-y += tee-uclass.o diff --git a/drivers/tee/tee-uclass.c b/drivers/tee/tee-uclass.c new file mode 100644 index 000000000000..0209983491a0 --- /dev/null +++ b/drivers/tee/tee-uclass.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2018 Linaro Limited + */ + +#include +#include +#include + +/** + * struct tee_uclass_priv - information of a TEE, stored by the uclass + * + * @list_shm: list of structe tee_shm representing memory blocks shared + * with the TEE. + */ +struct tee_uclass_priv { + struct list_head list_shm; +}; + +static const struct tee_driver_ops *tee_get_ops(struct udevice *dev) +{ + return device_get_ops(dev); +} + +void tee_get_version(struct udevice *dev, struct tee_version_data *vers) +{ + tee_get_ops(dev)->get_version(dev, vers); +} + +int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg, + ulong num_param, struct tee_param *param) +{ + return tee_get_ops(dev)->open_session(dev, arg, num_param, param); +} + +int tee_close_session(struct udevice *dev, u32 session) +{ + return tee_get_ops(dev)->close_session(dev, session); +} + +int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg, + ulong num_param, struct tee_param *param) +{ + return tee_get_ops(dev)->invoke_func(dev, arg, num_param, param); +} + +struct tee_shm *__tee_shm_add(struct udevice *dev, ulong align, void *addr, + ulong size, u32 flags) +{ + struct tee_shm *shm; + void *p = addr; + + if (flags & TEE_SHM_ALLOC) { + if (align) + p = memalign(align, size); + else + p = malloc(size); + } + if (!p) + return NULL; + + shm = calloc(1, sizeof(*shm)); + if (!shm) + goto err; + + shm->dev = dev; + shm->addr = p; + shm->size = size; + shm->flags = flags; + + if ((flags & TEE_SHM_SEC_REGISTER) && + tee_get_ops(dev)->shm_register(dev, shm)) + goto err; + + if (flags & TEE_SHM_REGISTER) { + struct tee_uclass_priv *priv = dev_get_uclass_priv(dev); + + list_add(&shm->link, &priv->list_shm); + } + return shm; +err: + free(shm); + if (flags & TEE_SHM_ALLOC) + free(p); + return NULL; +} + +struct tee_shm *tee_shm_alloc(struct udevice *dev, ulong size, + u32 flags) +{ + u32 f = flags; + + f |= TEE_SHM_SEC_REGISTER | TEE_SHM_REGISTER | TEE_SHM_ALLOC; + return __tee_shm_add(dev, 0, NULL, size, f); +} + +struct tee_shm *tee_shm_register(struct udevice *dev, void *addr, + ulong size, u32 flags) +{ + u32 f = flags & ~TEE_SHM_ALLOC; + + f |= TEE_SHM_SEC_REGISTER | TEE_SHM_REGISTER; + return __tee_shm_add(dev, 0, addr, size, f); +} + +void tee_shm_free(struct tee_shm *shm) +{ + if (!shm) + return; + + if (shm->flags & TEE_SHM_SEC_REGISTER) + tee_get_ops(shm->dev)->shm_unregister(shm->dev, shm); + + if (shm->flags & TEE_SHM_REGISTER) + list_del(&shm->link); + + if (shm->flags & TEE_SHM_ALLOC) + free(shm->addr); + + free(shm); +} + +bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev) +{ + struct tee_uclass_priv *priv = dev_get_uclass_priv(dev); + struct tee_shm *s; + + list_for_each_entry(s, &priv->list_shm, link) + if (s == shm) + return true; + + return false; +} + +struct udevice *tee_find_device(struct udevice *start, + int (*match)(struct tee_version_data *vers, + const void *data), + const void *data, + struct tee_version_data *vers) +{ + struct udevice *dev = start; + struct tee_version_data lv; + struct tee_version_data *v = vers ? vers : &lv; + + if (!dev) + uclass_first_device(UCLASS_TEE, &dev); + + for (; dev; uclass_next_device(&dev)) { + tee_get_ops(dev)->get_version(dev, v); + if (!match || match(v, data)) + return dev; + } + + return NULL; +} + +static int tee_pre_probe(struct udevice *dev) +{ + struct tee_uclass_priv *priv = dev_get_uclass_priv(dev); + + INIT_LIST_HEAD(&priv->list_shm); + + return 0; +} + +static int tee_pre_remove(struct udevice *dev) +{ + struct tee_uclass_priv *priv = dev_get_uclass_priv(dev); + struct tee_shm *shm; + + /* + * Any remaining shared memory must be unregistered now as U-boot + * is about to hand over to the next stage and that memory will be + * reused. + */ + while (!list_empty(&priv->list_shm)) { + shm = list_first_entry(&priv->list_shm, struct tee_shm, link); + debug("%s: freeing leftover shm %p (size %lu, flags %#x)\n", + __func__, (void *)shm, shm->size, shm->flags); + tee_shm_free(shm); + } + + return 0; +} + +UCLASS_DRIVER(tee) = { + .id = UCLASS_TEE, + .name = "tee", + .per_device_auto_alloc_size = sizeof(struct tee_uclass_priv), + .pre_probe = tee_pre_probe, + .pre_remove = tee_pre_remove, +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index a39643ec5eef..955e0a915b87 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -81,6 +81,7 @@ enum uclass_id { UCLASS_SPI_GENERIC, /* Generic SPI flash target */ UCLASS_SYSCON, /* System configuration device */ UCLASS_SYSRESET, /* System reset device */ + UCLASS_TEE, /* Trusted Execution Environment device */ UCLASS_THERMAL, /* Thermal sensor */ UCLASS_TIMER, /* Timer device */ UCLASS_TPM, /* Trusted Platform Module TIS interface */ diff --git a/include/tee.h b/include/tee.h new file mode 100644 index 000000000000..3e6771123ef0 --- /dev/null +++ b/include/tee.h @@ -0,0 +1,290 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2018 Linaro Limited + */ + +#ifndef __TEE_H +#define __TEE_H + +#include +#include + +#define TEE_UUID_LEN 16 + +#define TEE_GEN_CAP_GP BIT(0) /* GlobalPlatform compliant TEE */ +#define TEE_GEN_CAP_REG_MEM BIT(1) /* Supports registering shared memory */ + +#define TEE_SHM_REGISTER BIT(0) /* In list of shared memory */ +#define TEE_SHM_SEC_REGISTER BIT(1) /* TEE notified of this memory */ +#define TEE_SHM_ALLOC BIT(2) /* The memory is malloced() and must */ + /* be freed() */ + +#define TEE_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */ +#define TEE_PARAM_ATTR_TYPE_VALUE_INPUT 1 +#define TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT 2 +#define TEE_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */ +#define TEE_PARAM_ATTR_TYPE_MEMREF_INPUT 5 +#define TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6 +#define TEE_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */ +#define TEE_PARAM_ATTR_TYPE_MASK 0xff +#define TEE_PARAM_ATTR_META 0x100 +#define TEE_PARAM_ATTR_MASK (TEE_PARAM_ATTR_TYPE_MASK | \ + TEE_PARAM_ATTR_META) + +/* + * Some Global Platform error codes which has a meaning if the + * TEE_GEN_CAP_GP bit is returned by the driver in + * struct tee_version_data::gen_caps + */ +#define TEE_SUCCESS 0x00000000 +#define TEE_ERROR_GENERIC 0xffff0000 +#define TEE_ERROR_BAD_PARAMETERS 0xffff0006 +#define TEE_ERROR_ITEM_NOT_FOUND 0xffff0008 +#define TEE_ERROR_NOT_IMPLEMENTED 0xffff0009 +#define TEE_ERROR_NOT_SUPPORTED 0xffff000a +#define TEE_ERROR_COMMUNICATION 0xffff000e +#define TEE_ERROR_OUT_OF_MEMORY 0xffff000c +#define TEE_ERROR_TARGET_DEAD 0xffff3024 + +#define TEE_ORIGIN_COMMS 0x00000002 + +/** + * struct tee_shm - memory shared with the TEE + * @dev: The TEE device + * @link: List node in the list in struct struct tee_uclass_priv + * @addr: Pointer to the shared memory + * @size: Size of the the shared memory + * @flags: TEE_SHM_* above + */ +struct tee_shm { + struct udevice *dev; + struct list_head link; + void *addr; + ulong size; + u32 flags; +}; + +/** + * struct tee_param_memref - parameter memory reference + * @shm_offs: Offset in bytes into the shared memory object @shm + * @size: Size in bytes of the memory reference + * @shm: Pointer to a shared memory object for the buffer + */ +struct tee_param_memref { + ulong shm_offs; + ulong size; + struct tee_shm *shm; +}; + +/** + * struct tee_param_value - value parameter + * @a, @b, @c: Parameters passed by value + */ +struct tee_param_value { + u64 a; + u64 b; + u64 c; +}; + +/** + * struct tee_param - invoke parameter + * @attr: Attributes + * @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of + * TEE_PARAM_ATTR_TYPE_MEMREF_* above + * @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of + * TEE_PARAM_ATTR_TYPE_VALUE_* above + */ +struct tee_param { + u64 attr; + union { + struct tee_param_memref memref; + struct tee_param_value value; + } u; +}; + +/** + * struct tee_open_session_arg - extra arguments for tee_open_session() + * @uuid: [in] UUID of the Trusted Application + * @clnt_uuid: [in] Normally zeroes + * @clnt_login: [in] Normally 0 + * @session: [out] Session id + * @ret: [out] return value + * @ret_origin: [out] origin of the return value + */ +struct tee_open_session_arg { + u8 uuid[TEE_UUID_LEN]; + u8 clnt_uuid[TEE_UUID_LEN]; + u32 clnt_login; + u32 session; + u32 ret; + u32 ret_origin; +}; + +/** + * struct tee_invoke_arg - extra arguments for tee_invoke_func() + * @func: [in] Trusted Application function, specific to the TA + * @session: [in] Session id, from open session + * @ret: [out] return value + * @ret_origin: [out] origin of the return value + */ +struct tee_invoke_arg { + u32 func; + u32 session; + u32 ret; + u32 ret_origin; +}; + +/** + * struct tee_version_data - description of TEE + * @gen_caps: Generic capabilities, TEE_GEN_CAP_* above + */ +struct tee_version_data { + u32 gen_caps; +}; + +/** + * struct tee_driver_ops - TEE driver operations + * @get_version: Query capabilities of TEE device, + see tee_get_version() + * @open_session: Opens a session to a Trusted Application in the TEE, + * see tee_open_session(). + * @close_session: Closes a session to Trusted Application, + * see tee_close_session() + * @invoke_func: Invokes a function in a Trusted Application, + see tee_invoke_func() + */ +struct tee_driver_ops { + void (*get_version)(struct udevice *dev, struct tee_version_data *vers); + int (*open_session)(struct udevice *dev, + struct tee_open_session_arg *arg, ulong num_param, + struct tee_param *param); + int (*close_session)(struct udevice *dev, u32 session); + int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg, + ulong num_param, struct tee_param *param); + /** + * shm_register() - Registers memory shared with the TEE + * @dev: The TEE device + * @shm: Pointer to a shared memory object + * Returns 0 on success or < 0 on failure. + */ + int (*shm_register)(struct udevice *dev, struct tee_shm *shm); + /** + * shm_unregister() - Unregisters memory shared with the TEE + * @dev: The TEE device + * @shm: Pointer to a shared memory object + * Returns 0 on success or < 0 on failure. + */ + int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm); +}; + +/** + * __tee_shm_add() - Internal helper function to register shared memory + * @dev: The TEE device + * @align: Required alignment of allocated memory block if + * (@flags & TEE_SHM_ALLOC) + * @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC) + * @size: Size of memory block + * @flags: TEE_SHM_* above + * + * returns pointer to struct tee_shm on success or NULL on error + */ +struct tee_shm *__tee_shm_add(struct udevice *dev, ulong align, void *addr, + ulong size, u32 flags); + +/** + * tee_shm_alloc() - Allocate shared memory + * @dev: The TEE device + * @size: Size of memory block + * @flags: TEE_SHM_* above + * + * returns pointer to struct tee_shm on success or NULL on error + */ +struct tee_shm *tee_shm_alloc(struct udevice *dev, ulong size, u32 flags); + +/** + * tee_shm_register() - Registers shared memory + * @dev: The TEE device + * @addr: Address of memory block + * @size: Size of memory block + * @flags: TEE_SHM_* above + * + * returns pointer to struct tee_shm on success or NULL on error + */ +struct tee_shm *tee_shm_register(struct udevice *dev, void *addr, + ulong length, u32 flags); + +/** + * tee_shm_free() - Frees shared memory + * @shm: Shared memory object + */ +void tee_shm_free(struct tee_shm *shm); + +/** + * tee_shm_is_registered() - Check register status of shared memory object + * @shm: Pointer to shared memory object + * @dev: The TEE device + * + * Returns true if the shared memory object is registered for the supplied + * TEE device + */ +bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev); + +/** + * tee_find_device() - Look up a TEE device + * @start: if not NULL, continue search after this device + * @match: function to check TEE device + * @data: data for match function + * @vers: if not NULL, version data of TEE device of the device returned + * + * Returns a probed TEE device of the first TEE device matched by the + * match() callback or NULL. + */ +struct udevice *tee_find_device(struct udevice *start, + int (*match)(struct tee_version_data *vers, + const void *data), + const void *data, + struct tee_version_data *vers); + +/** + * tee_get_version() - Query capabilities of TEE device + * @dev: The TEE device + * @vers: Pointer to version data + */ +void tee_get_version(struct udevice *dev, struct tee_version_data *vers); + +/** + * tee_open_session() - Open a session to a Trusted Application + * @dev: The TEE device + * @arg: Open session arguments + * @num_param: Number of elements in @param + * @param: Parameters for Trusted Application + * + * Returns < 0 on error else see @arg->ret for result. If @arg->ret is + * TEE_SUCCESS the session identifier is available in @arg->session. + */ +int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg, + ulong num_param, struct tee_param *param); + +/** + * tee_close_session() - Close a session to a Trusted Application + * @dev: The TEE device + * @session: Session id + * + * Return < 0 on error else 0, regardless the session will not be valid + * after this function has returned. + */ +int tee_close_session(struct udevice *dev, u32 session); + +/** + * tee_invoke_func() - Invoke a function in a Trusted Application + * @dev: The TEE device + * @arg: Invoke arguments + * @num_param: Number of elements in @param + * @param: Parameters for Trusted Application + * + * Returns < 0 on error else see @arg->ret for result. + */ +int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg, + ulong num_param, struct tee_param *param); + +#endif /*__TEE_H*/