linux-toradex.git/drivers/tee/tee_core.c, branch v5.9-rc5

Merge tag 'tee-login-for-5.8' of git://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers

2020-05-25T21:15:03+00:00

Adds utility function in TEE subsystem for client UUID generation. This
function is also used in the optee driver.

* tag 'tee-login-for-5.8' of git://git.linaro.org/people/jens.wiklander/linux-tee:
  tee: optee: Add support for session login client UUID generation
  tee: add support for session's client UUID generation

Link: https://lore.kernel.org/r/20200512131243.GA10028@jade
Signed-off-by: Arnd Bergmann

tee: add support for session's client UUID generation

2020-05-11T12:11:26+00:00

TEE Client API defines that from user space only information needed for
specified login operations is group identifier for group based logins.

REE kernel is expected to formulate trustworthy client UUID and pass that
to TEE environment. REE kernel is required to verify that provided group
identifier for group based logins matches calling processes group
memberships.

TEE specification only defines that the information passed from REE
environment to TEE environment is encoded into on UUID.

In order to guarantee trustworthiness of client UUID user space is not
allowed to freely pass client UUID.

UUIDv5 form is used encode variable amount of information needed for
different login types.

Signed-off-by: Vesa Jääskeläinen 
[jw: remove unused variable application_id]
Signed-off-by: Jens Wiklander

tee: add private login method for kernel clients

2020-04-20T14:18:14+00:00

There are use-cases where user-space shouldn't be allowed to communicate
directly with a TEE device which is dedicated to provide a specific
service for a kernel client. So add a private login method for kernel
clients and disallow user-space to open-session using GP implementation
defined login method range: (0x80000000 - 0xBFFFFFFF).

Reviewed-by: Jerome Forissier 
Signed-off-by: Sumit Garg 
Signed-off-by: Jens Wiklander

tee: remove linked list of struct tee_shm

2020-02-28T12:37:42+00:00

Removes list_shm from struct tee_context since the linked list isn't used
any longer.

Signed-off-by: Jens Wiklander

compat_ioctl: move more drivers to compat_ptr_ioctl

2019-10-23T15:23:44+00:00

The .ioctl and .compat_ioctl file operations have the same prototype so
they can both point to the same function, which works great almost all
the time when all the commands are compatible.

One exception is the s390 architecture, where a compat pointer is only
31 bit wide, and converting it into a 64-bit pointer requires calling
compat_ptr(). Most drivers here will never run in s390, but since we now
have a generic helper for it, it's easy enough to use it consistently.

I double-checked all these drivers to ensure that all ioctl arguments
are used as pointers or are ignored, but are not interpreted as integer
values.

Acked-by: Jason Gunthorpe 
Acked-by: Daniel Vetter 
Acked-by: Mauro Carvalho Chehab 
Acked-by: Greg Kroah-Hartman 
Acked-by: David Sterba 
Acked-by: Darren Hart (VMware) 
Acked-by: Jonathan Cameron 
Acked-by: Bjorn Andersson 
Acked-by: Dan Williams 
Signed-off-by: Arnd Bergmann

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282

2019-06-05T15:36:37+00:00

Based on 1 normalized pattern(s):

  this software is licensed under the terms of the gnu general public
  license version 2 as published by the free software foundation and
  may be copied distributed and modified under those terms this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 285 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de
Signed-off-by: Greg Kroah-Hartman

Merge tag 'tee-misc-for-v5.1' of https://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers

2019-03-01T14:01:16+00:00

OP-TEE driver
- dual license for optee_msg.h and optee_smc.h
Generic
- add cancellation support to client interface

* tag 'tee-misc-for-v5.1' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  tee: optee: update optee_msg.h and optee_smc.h to dual license
  tee: add cancellation support to client interface

Signed-off-by: Arnd Bergmann

tee: add cancellation support to client interface

2019-02-28T12:49:29+00:00

Add support of cancellation request to the TEE kernel internal
client interface. Can be used by software TPM drivers, that leverage
TEE under the hood (for instance TPM2.0 mobile profile), for requesting
cancellation of time-consuming operations (RSA key-pair generation etc.).

Signed-off-by: Igor Opaniuk 
Signed-off-by: Jens Wiklander

tee: fix possible error pointer ctx dereferencing

2019-02-20T16:54:34+00:00

Add check for valid ctx pointer and then only dereference ctx to
configure supp_nowait flag.

Fixes: 42bf4152d8a7 ("tee: add supp_nowait flag in tee_context struct")
Reported-by: Dan Carpenter 
Signed-off-by: Sumit Garg 
Signed-off-by: Arnd Bergmann

tee: add bus driver framework for TEE based devices

2019-02-01T14:12:46+00:00

Introduce a generic TEE bus driver concept for TEE based kernel drivers
which would like to communicate with TEE based devices/services. Also
add support in module device table for these new TEE based devices.

In this TEE bus concept, devices/services are identified via Universally
Unique Identifier (UUID) and drivers register a table of device UUIDs
which they can support.

So this TEE bus framework registers following apis:
- match(): Iterates over the driver UUID table to find a corresponding
  match for device UUID. If a match is found, then this particular device
  is probed via corresponding probe api registered by the driver. This
  process happens whenever a device or a driver is registered with TEE
  bus.
- uevent(): Notifies user-space (udev) whenever a new device is registered
  on this bus for auto-loading of modularized drivers.

Also this framework allows for device enumeration to be specific to
corresponding TEE implementation like OP-TEE etc.

Signed-off-by: Sumit Garg 
Reviewed-by: Daniel Thompson 
Reviewed-by: Bhupesh Sharma 
Signed-off-by: Jens Wiklander