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.
Signed-off-by: Jens Wiklander <jens.wiklan...@linaro.org>
---
MAINTAINERS | 6 ++
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/tee/Kconfig | 8 ++
drivers/tee/Makefile | 3 +
drivers/tee/tee-uclass.c | 180 +++++++++++++++++++++++++++++++++++++++
include/dm/uclass-id.h | 1 +
include/tee.h | 134 +++++++++++++++++++++++++++++
8 files changed, 335 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
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 <jens.wiklan...@linaro.org>
+S: Maintained
+F: drivers/tee/
+F: include/tee.h
+
UBI
M: Kyungmin Park <kmp...@infradead.org>
M: Heiko Schocher <h...@denx.de>
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..f0243a0f2e4e
--- /dev/null
+++ b/drivers/tee/tee-uclass.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Linaro Limited
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <tee.h>
+
+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;
+
+ 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..c2ac13e34128
--- /dev/null
+++ b/include/tee.h
@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (c) 2018 Linaro Limited
+ */
+
+#ifndef __TEE_H
+#define __TEE_H
+
+#include <common.h>
+#include <dm.h>
+
+#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)
+#define TEE_SHM_SEC_REGISTER BIT(1)
+#define TEE_SHM_ALLOC BIT(2)
+
+#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.
+ */
+#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_driver_ops;
+
+struct tee_shm {
+ struct udevice *dev;
+ struct list_head link;
+ void *addr;
+ ulong size;
+ u32 flags;
+};
+
+struct tee_param_memref {
+ ulong shm_offs;
+ ulong size;
+ struct tee_shm *shm;
+};
+
+struct tee_param_value {
+ u64 a;
+ u64 b;
+ u64 c;
+};
+
+struct tee_param {
+ u64 attr;
+ union {
+ struct tee_param_memref memref;
+ struct tee_param_value value;
+ } u;
+};
+
+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 {
+ u32 func;
+ u32 session;
+ u32 ret;
+ u32 ret_origin;
+};
+
+struct tee_version_data {
+ u32 gen_caps;
+};
+
+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);
+ int (*shm_register)(struct udevice *dev, struct tee_shm *shm);
+ int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
+};
+
+struct tee_shm *__tee_shm_add(struct udevice *dev, ulong align, void *addr,
+ ulong size, u32 flags);
+struct tee_shm *tee_shm_alloc(struct udevice *dev, ulong size, u32 flags);
+struct tee_shm *tee_shm_register(struct udevice *dev, void *addr,
+ ulong length, u32 flags);
+void tee_shm_free(struct tee_shm *shm);
+bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
+
+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);
+
+void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
+int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
+ ulong num_param, struct tee_param *param);
+
+int tee_close_session(struct udevice *dev, u32 session);
+
+int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
+ ulong num_param, struct tee_param *param);
+
+#endif /*__TEE_H*/
--
2.17.1
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
