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* Merge tag 'tee-drv-dynamic-shm+fixes-for-v4.16' of ↵Olof Johansson2018-01-113-14/+59
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers This pull request updates the previous tee-drv-dynamic-shm-for-v4.16 pull request with five new patches fixing review comments and errors. Apart from three small fixes there's two larger patches that in the end checks that memory to be registered really is normal cached memory. * tag 'tee-drv-dynamic-shm+fixes-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee: tee: shm: Potential NULL dereference calling tee_shm_register() tee: shm: don't put_page on null shm->pages tee: shm: make function __tee_shm_alloc static tee: optee: check type of registered shared memory tee: add start argument to shm_register callback Signed-off-by: Olof Johansson <olof@lixom.net>
| * tee: shm: Potential NULL dereference calling tee_shm_register()Dan Carpenter2018-01-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | get_user_pages_fast() can return zero in certain error paths. We should handle that or else it means we accidentally return ERR_PTR(0) which is NULL instead of an error pointer. The callers are not expecting that and will crash with a NULL dereference. Fixes: 033ddf12bcf5 ("tee: add register user memory") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: shm: don't put_page on null shm->pagesColin Ian King2017-12-281-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In the case that shm->pages fails to allocate, the current exit error path will try to put_page on a null shm->pages and cause a null pointer dereference when accessing shm->pages[n]. Fix this by only performing the put_page and kfree on shm->pages if it is not null. Detected by CoverityScan, CID#1463283 ("Dereference after null check") Fixes: 033ddf12bcf5 ("tee: add register user memory") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: shm: make function __tee_shm_alloc staticColin Ian King2017-12-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | The function __tee_shm_alloc is local to the source and does not need to be in global scope, so make it static. Cleans up sparse warning: symbol '__tee_shm_alloc' was not declared. Should it be static? Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: check type of registered shared memoryJens Wiklander2017-12-281-2/+42
| | | | | | | | | | | | | | Checks the memory type of the pages to be registered as shared memory. Only normal cached memory is allowed. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: add start argument to shm_register callbackJens Wiklander2017-12-283-5/+9
| | | | | | | | | | | | | | Adds a start argument to the shm_register callback to allow the callback to check memory type of the passed pages. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* | tee: optee: fix header dependenciesArnd Bergmann2017-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The optee driver includes the header files in an unusual order, with asm/pgtable.h before the linux/*.h headers. For some reason this seems to trigger a build failure: drivers/tee/optee/call.c: In function 'optee_fill_pages_list': include/asm-generic/memory_model.h:64:14: error: implicit declaration of function 'page_to_section'; did you mean '__nr_to_section'? [-Werror=implicit-function-declaration] int __sec = page_to_section(__pg); \ drivers/tee/optee/call.c:494:15: note: in expansion of macro 'page_to_phys' optee_page = page_to_phys(*pages) + Let's just include linux/mm.h, which will then get the other header implicitly. Fixes: 3bb48ba5cd60 ("tee: optee: add page list manipulation functions") Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* | Merge tag 'tee-drv-dynamic-shm-for-v4.16' of ↵Arnd Bergmann2017-12-2113-218/+895
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers Pull "tee dynamic shm for v4.16" from Jens Wiklander: This pull request enables dynamic shared memory support in the TEE subsystem as a whole and in OP-TEE in particular. Global Platform TEE specification [1] allows client applications to register part of own memory as a shared buffer between application and TEE. This allows fast zero-copy communication between TEE and REE. But current implementation of TEE in Linux does not support this feature. Also, current implementation of OP-TEE transport uses fixed size pre-shared buffer for all communications with OP-TEE OS. This is okay in the most use cases. But this prevents use of OP-TEE in virtualized environments, because: a) We can't share the same buffer between different virtual machines b) Physically contiguous memory as seen by VM can be non-contiguous in reality (and as seen by OP-TEE OS) due to second stage of MMU translation. c) Size of this pre-shared buffer is limited. So, first part of this pull request adds generic register/unregister interface to tee subsystem. The second part adds necessary features into OP-TEE driver, so it can use not only static pre-shared buffer, but whole RAM to communicate with OP-TEE OS. This change is backwards compatible allowing older secure world or user space to work with newer kernels and vice versa. [1] https://www.globalplatform.org/specificationsdevice.asp * tag 'tee-drv-dynamic-shm-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee: tee: shm: inline tee_shm_get_id() tee: use reference counting for tee_context tee: optee: enable dynamic SHM support tee: optee: add optee-specific shared pool implementation tee: optee: store OP-TEE capabilities in private data tee: optee: add registered buffers handling into RPC calls tee: optee: add registered shared parameters handling tee: optee: add shared buffer registration functions tee: optee: add page list manipulation functions tee: optee: Update protocol definitions tee: shm: add page accessor functions tee: shm: add accessors for buffer size and page offset tee: add register user memory tee: flexible shared memory pool creation
| * tee: shm: inline tee_shm_get_id()Volodymyr Babchuk2017-12-151-11/+0
| | | | | | | | | | | | | | | | Now, when struct tee_shm is defined in public header, we can inline small getter functions like this one. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: use reference counting for tee_contextVolodymyr Babchuk2017-12-153-9/+41
| | | | | | | | | | | | | | | | We need to ensure that tee_context is present until last shared buffer will be freed. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: enable dynamic SHM supportVolodymyr Babchuk2017-12-151-18/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previous patches added various features that are needed for dynamic SHM. Dynamic SHM allows Normal World to share any buffers with OP-TEE. While original design suggested to use pre-allocated region (usually of 1M to 2M of size), this new approach allows to use all non-secure RAM for command buffers, RPC allocations and TA parameters. This patch checks capability OPTEE_SMC_SEC_CAP_DYNAMIC_SHM. If it was set by OP-TEE, then kernel part of OP-TEE will use kernel page allocator to allocate command buffers. Also it will set TEE_GEN_CAP_REG_MEM capability to tell userspace that it supports shared memory registration. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: add optee-specific shared pool implementationVolodymyr Babchuk2017-12-153-0/+99
| | | | | | | | | | | | | | | | This is simple pool that uses kernel page allocator. This pool can be used in case OP-TEE supports dynamic shared memory. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: store OP-TEE capabilities in private dataVolodymyr Babchuk2017-12-152-0/+4
| | | | | | | | | | | | | | Those capabilities will be used in subsequent patches. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: add registered buffers handling into RPC callsVolodymyr Babchuk2017-12-154-11/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With latest changes to OP-TEE we can use any buffers as a shared memory. Thus, it is possible for supplicant to provide part of own memory when OP-TEE asks to allocate a shared buffer. This patch adds support for such feature into RPC handling code. Now when OP-TEE asks supplicant to allocate shared buffer, supplicant can use TEE_IOC_SHM_REGISTER to provide such buffer. RPC handler is aware of this, so it will pass list of allocated pages to OP-TEE. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> [jw: fix parenthesis alignment in free_pages_list()] Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: add registered shared parameters handlingVolodymyr Babchuk2017-12-151-15/+63
| | | | | | | | | | | | | | | | | | | | | | Now, when client applications can register own shared buffers in OP-TEE, we need to extend ABI for parameter passing to/from OP-TEE. So, if OP-TEE core detects that parameter belongs to registered shared memory, it will use corresponding parameter attribute. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: add shared buffer registration functionsVolodymyr Babchuk2017-12-153-0/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change adds ops for shm_(un)register functions in tee interface. Client application can use these functions to (un)register an own shared buffer in OP-TEE address space. This allows zero copy data sharing between Normal and Secure Worlds. Please note that while those functions were added to optee code, it does not report to userspace that those functions are available. OP-TEE code does not set TEE_GEN_CAP_REG_MEM flag. This flag will be enabled only after all other features of dynamic shared memory will be implemented in subsequent patches. Of course user can ignore presence of TEE_GEN_CAP_REG_MEM flag and try do call those functions. This is okay, driver will register shared buffer in OP-TEE, but any attempts to use this shared buffer will fail. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: add page list manipulation functionsVolodymyr Babchuk2017-12-152-0/+96
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These functions will be used to pass information about shared buffers to OP-TEE. ABI between Linux and OP-TEE is defined in optee_msg.h and optee_smc.h. optee_msg.h defines OPTEE_MSG_ATTR_NONCONTIG attribute for shared memory references and describes how such references should be passed. Note that it uses 64-bit page addresses even on 32 bit systems. This is done to support LPAE and to unify interface. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> [jw: replacing uint64_t with u64 in optee_fill_pages_list()] Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: optee: Update protocol definitionsVolodymyr Babchuk2017-12-152-6/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were changes in REE<->OP-TEE ABI recently. Now ABI allows us to pass non-contiguous memory buffers as list of pages to OP-TEE. This can be achieved by using new parameter attribute OPTEE_MSG_ATTR_NONCONTIG. OP-TEE also is able to use all non-secure RAM for shared buffers. This new capability is enabled with OPTEE_SMC_SEC_CAP_DYNAMIC_SHM flag. This patch adds necessary definitions to the protocol definition files at Linux side. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: add register user memoryJens Wiklander2017-12-152-28/+219
| | | | | | | | | | | | | | | | | | Added new ioctl to allow users register own buffers as a shared memory. Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> [jw: moved tee_shm_is_registered() declaration] [jw: added space after __tee_shm_alloc() implementation] Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: flexible shared memory pool creationJens Wiklander2017-12-153-122/+108
| | | | | | | | | | | | | | | | | | Makes creation of shm pools more flexible by adding new more primitive functions to allocate a shm pool. This makes it easier to add driver specific shm pool management. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
* | Merge tag 'tee-drv-async-supplicant-for-v4.16' of ↵Arnd Bergmann2017-12-215-189/+276
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers Pull "Enable async communication with tee supplicant" from Jens Wiklander: This pull request enables asynchronous communication with TEE supplicant by introducing meta parameters in the user space API. The meta parameters can be used to tag requests with an id that can be matched against an asynchronous response as is done here in the OP-TEE driver. Asynchronous supplicant communication is needed by OP-TEE to implement GlobalPlatforms TEE Sockets API Specification v1.0.1. The specification is available at https://www.globalplatform.org/specificationsdevice.asp. This change is backwards compatible allowing older supplicants to work with newer kernels and vice versa. * tag 'tee-drv-async-supplicant-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee: optee: support asynchronous supplicant requests tee: add TEE_IOCTL_PARAM_ATTR_META tee: add tee_param_is_memref() for driver use
| * optee: support asynchronous supplicant requestsJens Wiklander2017-11-294-173/+243
| | | | | | | | | | | | | | | | | | | | Adds support for asynchronous supplicant requests, meaning that the supplicant can process several requests in parallel or block in a request for some time. Acked-by: Etienne Carriere <etienne.carriere@linaro.org> Tested-by: Etienne Carriere <etienne.carriere@linaro.org> (b2260 pager=y/n) Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: add TEE_IOCTL_PARAM_ATTR_METAJens Wiklander2017-11-292-6/+35
| | | | | | | | | | | | | | | | | | Adds TEE_IOCTL_PARAM_ATTR_META which can be used to indicate meta parameters when communicating with user space. These meta parameters can be used by supplicant support multiple parallel requests at a time. Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
| * tee: add tee_param_is_memref() for driver useJens Wiklander2017-11-291-14/+2
| | | | | | | | | | Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* | optee: fix invalid of_node_put() in optee_driver_init()Jens Wiklander2017-11-291-1/+0
|/ | | | | | | | | | | | The first node supplied to of_find_matching_node() has its reference counter decreased as part of call to that function. In optee_driver_init() after calling of_find_matching_node() it's invalid to call of_node_put() on the supplied node again. So remove the invalid call to of_node_put(). Reported-by: Alex Shi <alex.shi@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman2017-11-022-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tee: optee: sync with new naming of interruptsDavid Wang2017-08-042-10/+10
| | | | | | | | | In the latest changes of optee_os, the interrupts' names are changed to "native" and "foreign" interrupts. Signed-off-by: David Wang <david.wang@arm.com> Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: indicate privileged dev in gen_capsJens Wiklander2017-08-041-0/+5
| | | | | | | | | Mirrors the TEE_DESC_PRIVILEGED bit of struct tee_desc:flags into struct tee_ioctl_version_data:gen_caps as TEE_GEN_CAP_PRIVILEGED in tee_ioctl_version() Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: optee: interruptible RPC sleeptiger-yu992017-08-041-5/+2
| | | | | | | | | | Prior to this patch RPC sleep was uninterruptible since msleep() is uninterruptible. Change to use msleep_interruptible() instead. Signed-off-by: Tiger Yu <tigeryu99@hotmail.com> Reviewed-by: Joakim Bech <joakim.bech@linaro.org> Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: optee: add const to tee_driver_ops and tee_desc structuresBhumika Goyal2017-08-041-4/+4
| | | | | | | | | | | | Add const to tee_desc structures as they are only passed as an argument to the function tee_device_alloc. This argument is of type const, so declare these structures as const too. Add const to tee_driver_ops structures as they are only stored in the ops field of a tee_desc structure. This field is of type const, so declare these structure types as const. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: tee_shm: Constify dma_buf_ops structures.Arvind Yadav2017-08-041-1/+1
| | | | | | | | | | | | | | | | | dma_buf_ops are not supposed to change at runtime. All functions working with dma_buf_ops provided by <linux/dma-buf.h> work with const dma_buf_ops. So mark the non-const structs as const. File size before: text data bss dec hex filename 2026 112 0 2138 85a drivers/tee/tee_shm.o File size After adding 'const': text data bss dec hex filename 2138 0 0 2138 85a drivers/tee/tee_shm.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: optee: fix uninitialized symbol 'parg'Jens Wiklander2017-08-041-5/+6
| | | | | | | | Fixes the static checker warning in optee_release(). error: uninitialized symbol 'parg'. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* Merge tag 'v4.12-rc1' into fixesOlof Johansson2017-05-181-4/+4
|\ | | | | | | | | | | | | | | We've received a few fixes branches with -rc1 as base, but our contents was still at pre-rc1. Merge it in expliticly to make 'git merge --log' clear on hat was actually merged. Signed-off-by: Olof Johansson <olof@lixom.net>
| * Merge tag 'armsoc-tee' of ↵Linus Torvalds2017-05-101-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull TEE driver infrastructure and OP-TEE drivers from Arnd Bergmann: "This introduces a generic TEE framework in the kernel, to handle trusted environemtns (security coprocessor or software implementations such as OP-TEE/TrustZone). I'm sending it separately from the other arm-soc driver changes to give it a little more visibility, once the subsystem is merged, we will likely keep this in the arm₋soc drivers branch or have the maintainers submit pull requests directly, depending on the patch volume. I have reviewed earlier versions in the past, and have reviewed the latest version in person during Linaro Connect BUD17. Here is my overall assessment of the subsystem: - There is clearly demand for this, both for the generic infrastructure and the specific OP-TEE implementation. - The code has gone through a large number of reviews, and the review comments have all been addressed, but the reviews were not coming up with serious issues any more and nobody volunteered to vouch for the quality. - The user space ioctl interface is sufficient to work with the OP-TEE driver, and it should in principle work with other TEE implementations that follow the GlobalPlatform[1] standards, but it might need to be extended in minor ways depending on specific requirements of future TEE implementations - The main downside of the API to me is how the user space is tied to the TEE implementation in hardware or firmware, but uses a generic way to communicate with it. This seems to be an inherent problem with what it is trying to do, and I could not come up with any better solution than what is implemented here. For a detailed history of the patch series, see https://lkml.org/lkml/2017/3/10/1277" * tag 'armsoc-tee' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: arm64: dt: hikey: Add optee node Documentation: tee subsystem and op-tee driver tee: add OP-TEE driver tee: generic TEE subsystem dt/bindings: add bindings for optee
* | tee: add ARM_SMCCC dependencyArnd Bergmann2017-05-101-0/+1
|/ | | | | | | | | For the moment, the tee subsystem only makes sense in combination with the op-tee driver that depends on ARM_SMCCC, so let's hide the subsystem from users that can't select that. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* tee: add OP-TEE driverJens Wiklander2017-03-1011-0/+2809
| | | | | | | | | | | | | | | | | Adds a OP-TEE driver which also can be compiled as a loadable module. * Targets ARM and ARM64 * Supports using reserved memory from OP-TEE as shared memory * Probes OP-TEE version using SMCs * Accepts requests on privileged and unprivileged device * Uses OPTEE message protocol version 2 to communicate with secure world Acked-by: Andreas Dannenberg <dannenberg@ti.com> Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (HiKey) Tested-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> (RCAR H3) Tested-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: generic TEE subsystemJens Wiklander2017-03-096-0/+1548
Initial patch for generic TEE subsystem. This subsystem provides: * Registration/un-registration of TEE drivers. * Shared memory between normal world and secure world. * Ioctl interface for interaction with user space. * Sysfs implementation_id of TEE driver A TEE (Trusted Execution Environment) 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. This patch builds on other similar implementations trying to solve the same problem: * "optee_linuxdriver" by among others Jean-michel DELORME<jean-michel.delorme@st.com> and Emmanuel MICHEL <emmanuel.michel@st.com> * "Generic TrustZone Driver" by Javier González <javier@javigon.com> Acked-by: Andreas Dannenberg <dannenberg@ti.com> Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (HiKey) Tested-by: Volodymyr Babchuk <vlad.babchuk@gmail.com> (RCAR H3) Tested-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Javier González <javier@javigon.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
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