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* tee: optee: Move pool_op helper functionsBalint Dobszay2024-04-031-0/+65
| | | | | | | | | | | | Move the pool alloc and free helper functions from the OP-TEE driver to the TEE subsystem, since these could be reused in other TEE drivers. This patch is not supposed to change behavior, it's only reorganizing the code. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Suggested-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Balint Dobszay <balint.dobszay@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: Refactor TEE subsystem header filesSumit Garg2024-04-031-1/+1
| | | | | | | | | | | | | | | | | | Since commit 25559c22cef8 ("tee: add kernel internal client interface"), it has been a common include/linux/tee_drv.h header file which is shared to hold TEE subsystem internal bits along with the APIs exposed to the TEE client drivers. However, this practice is prone to TEE subsystem internal APIs abuse and especially so with the new TEE implementation drivers being added to reuse existing functionality. In order to address this split TEE subsystem internal bits as a separate header file: include/linux/tee_core.h which should be the one used by TEE implementation drivers. With that include/linux/tee_drv.h lists only APIs exposed by TEE subsystem to the TEE client drivers. Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Balint Dobszay <balint.dobszay@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: Use iov_iter to better support shared buffer registrationArnaud Pouliquen2023-12-131-36/+42
| | | | | | | | | | | | | Currently it's not possible to register kernel buffers with TEE which are allocated via vmalloc. Use iov_iter and associated helper functions to manage the page registration for all type of memories. Suggested-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: Pass a pointer to virt_to_page()Linus Walleij2023-03-301-1/+1
| | | | | | | | | | | | | | Like the other calls in this function virt_to_page() expects a pointer, not an integer. However since many architectures implement virt_to_pfn() as a macro, this function becomes polymorphic and accepts both a (unsigned long) and a (void *). Fix this up with an explicit cast. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: Remove call to get_kernel_pages()Ira Weiny2023-02-131-13/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel pages used by shm_get_kernel_pages() are allocated using GFP_KERNEL through the following call stack: trusted_instantiate() trusted_payload_alloc() -> GFP_KERNEL <trusted key op> tee_shm_register_kernel_buf() register_shm_helper() shm_get_kernel_pages() Where <trusted key op> is one of: trusted_key_unseal() trusted_key_get_random() trusted_key_seal() Because the pages can't be from highmem get_kernel_pages() boils down to a get_page() call. Remove the get_kernel_pages() call and open code the get_page(). In case a highmem page does slip through warn on once for a kmap'ed address. Cc: Jens Wiklander <jens.wiklander@linaro.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "Fabio M. De Francesco" <fmdefrancesco@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: Remove vmalloc page supportIra Weiny2023-02-131-24/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel pages used by shm_get_kernel_pages() are allocated using GFP_KERNEL through the following call stack: trusted_instantiate() trusted_payload_alloc() -> GFP_KERNEL <trusted key op> tee_shm_register_kernel_buf() register_shm_helper() shm_get_kernel_pages() Where <trusted key op> is one of: trusted_key_unseal() trusted_key_get_random() trusted_key_seal() Remove the vmalloc page support from shm_get_kernel_pages(). Replace with a warn on once. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "Fabio M. De Francesco" <fmdefrancesco@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: fix compiler warning in tee_shm_register()Jens Wiklander2022-08-251-0/+1
| | | | | | | | | | | | | | Include <linux/uaccess.h> to avoid the warning: drivers/tee/tee_shm.c: In function 'tee_shm_register': >> drivers/tee/tee_shm.c:242:14: error: implicit declaration of function 'access_ok' [-Werror=implicit-function-declaration] 242 | if (!access_ok((void __user *)addr, length)) | ^~~~~~~~~ cc1: some warnings being treated as errors Fixes: 573ae4f13f63 ("tee: add overflow check in register_shm_helper()") Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: add overflow check in register_shm_helper()Jens Wiklander2022-08-181-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With special lengths supplied by user space, register_shm_helper() has an integer overflow when calculating the number of pages covered by a supplied user space memory region. This causes internal_get_user_pages_fast() a helper function of pin_user_pages_fast() to do a NULL pointer dereference: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 Modules linked in: CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11 Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pc : internal_get_user_pages_fast+0x474/0xa80 Call trace: internal_get_user_pages_fast+0x474/0xa80 pin_user_pages_fast+0x24/0x4c register_shm_helper+0x194/0x330 tee_shm_register_user_buf+0x78/0x120 tee_ioctl+0xd0/0x11a0 __arm64_sys_ioctl+0xa8/0xec invoke_syscall+0x48/0x114 Fix this by adding an an explicit call to access_ok() in tee_shm_register_user_buf() to catch an invalid user space address early. Fixes: 033ddf12bcf5 ("tee: add register user memory") Cc: stable@vger.kernel.org Reported-by: Nimish Mishra <neelam.nimish@gmail.com> Reported-by: Anirban Chakraborty <ch.anirban00727@gmail.com> Reported-by: Debdeep Mukhopadhyay <debdeep.mukhopadhyay@gmail.com> Suggested-by: Jerome Forissier <jerome.forissier@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'tee-cleanup-for-v5.19' of ↵Arnd Bergmann2022-05-061-50/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers TEE cleanup Removes the old and unused TEE_IOCTL_SHM_* flags Removes unused the unused tee_shm_va2pa() and tee_shm_pa2va() functions * tag 'tee-cleanup-for-v5.19' of https://git.linaro.org/people/jens.wiklander/linux-tee: tee: remove flags TEE_IOCTL_SHM_MAPPED and TEE_IOCTL_SHM_DMA_BUF tee: remove tee_shm_va2pa() and tee_shm_pa2va() Link: https://lore.kernel.org/r/20220506070328.GA1344495@jade Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| * tee: remove tee_shm_va2pa() and tee_shm_pa2va()Andrew Davis2022-04-261-50/+0
| | | | | | | | | | | | | | | | | | | | We should not need to index into SHMs based on absolute VA/PA. These functions are not used and this kind of usage should not be encouraged anyway. Remove these functions. Signed-off-by: Andrew Davis <afd@ti.com> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* | tee: make tee_shm_register_kernel_buf vmalloc supportedPhil Chang2022-04-051-10/+25
|/ | | | | | | | | In some low-memory devices, it's hard to aquire large-orders pages, this patch allowed user using scatter pages to register shm. Signed-off-by: Phil Chang <phil.chang@mediatek.com> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: refactor TEE_SHM_* flagsJens Wiklander2022-02-161-12/+11
| | | | | | | | | | | | | Removes the redundant TEE_SHM_DMA_BUF, TEE_SHM_EXT_DMA_BUF, TEE_SHM_MAPPED and TEE_SHM_KERNEL_MAPPED flags. TEE_SHM_REGISTER is renamed to TEE_SHM_DYNAMIC in order to better match its usage. Assigns new values to the remaining flags to void gaps. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: replace tee_shm_register()Jens Wiklander2022-02-161-66/+90
| | | | | | | | | | | tee_shm_register() is replaced by the previously introduced functions tee_shm_register_user_buf() and tee_shm_register_kernel_buf(). Since there are not external callers left we can remove tee_shm_register() and refactor the remains. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: add tee_shm_register_{user,kernel}_buf()Jens Wiklander2022-02-161-0/+33
| | | | | | | | | | | | Adds the two new functions tee_shm_register_user_buf() and tee_shm_register_kernel_buf() which should be used instead of the old tee_shm_register(). This avoids having the caller supplying the flags parameter which exposes a bit more than desired of the internals of the TEE subsystem. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: replace tee_shm_alloc()Jens Wiklander2022-02-161-40/+68
| | | | | | | | | | | | | | | | | | | | | tee_shm_alloc() is replaced by three new functions, tee_shm_alloc_user_buf() - for user mode allocations, replacing passing the flags TEE_SHM_MAPPED | TEE_SHM_DMA_BUF tee_shm_alloc_kernel_buf() - for kernel mode allocations, slightly optimized compared to using the flags TEE_SHM_MAPPED | TEE_SHM_DMA_BUF. tee_shm_alloc_priv_buf() - primarily for TEE driver internal use. This also makes the interface easier to use as we can get rid of the somewhat hard to use flags parameter. The TEE subsystem and the TEE drivers are updated to use the new functions instead. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: simplify shm pool handlingJens Wiklander2022-02-161-15/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replaces the shared memory pool based on two pools with a single pool. The alloc() function pointer in struct tee_shm_pool_ops gets another parameter, align. This makes it possible to make less than page aligned allocations from the optional reserved shared memory pool while still making user space allocations page aligned. With in practice unchanged behaviour using only a single pool for bookkeeping. The allocation algorithm in the static OP-TEE shared memory pool is changed from best-fit to first-fit since only the latter supports an alignment parameter. The best-fit algorithm was previously the default choice and not a conscious one. The optee and amdtee drivers are updated as needed to work with this changed pool handling. This also removes OPTEE_SHM_NUM_PRIV_PAGES which becomes obsolete with this change as the private pages can be mixed with the payload pages. The OP-TEE driver changes minimum alignment for argument struct from 8 bytes to 512 bytes. A typical OP-TEE private shm allocation is 224 bytes (argument struct with 6 parameters, needed for open session). So with an alignment of 512 well waste a bit more than 50%. Before this we had a single page reserved for this so worst case usage compared to that would be 3 pages instead of 1 page. However, this worst case only occurs if there is a high pressure from multiple threads on secure world. All in all this should scale up and down better than fixed boundaries. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: add tee_shm_alloc_user_buf()Jens Wiklander2022-02-161-0/+17
| | | | | | | | | Adds a new function tee_shm_alloc_user_buf() for user mode allocations, replacing passing the flags TEE_SHM_MAPPED | TEE_SHM_DMA_BUF to tee_shm_alloc(). Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: handle lookup of shm with reference count 0Jens Wiklander2021-12-161-108/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the tee subsystem does not keep a strong reference to its idle shared memory buffers, it races with other threads that try to destroy a shared memory through a close of its dma-buf fd or by unmapping the memory. In tee_shm_get_from_id() when a lookup in teedev->idr has been successful, it is possible that the tee_shm is in the dma-buf teardown path, but that path is blocked by the teedev mutex. Since we don't have an API to tell if the tee_shm is in the dma-buf teardown path or not we must find another way of detecting this condition. Fix this by doing the reference counting directly on the tee_shm using a new refcount_t refcount field. dma-buf is replaced by using anon_inode_getfd() instead, this separates the life-cycle of the underlying file from the tee_shm. tee_shm_put() is updated to hold the mutex when decreasing the refcount to 0 and then remove the tee_shm from teedev->idr before releasing the mutex. This means that the tee_shm can never be found unless it has a refcount larger than 0. Fixes: 967c9cca2cc5 ("tee: generic TEE subsystem") Cc: stable@vger.kernel.org Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Lars Persson <larper@axis.com> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Reported-by: Patrik Lantz <patrik.lantz@axis.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* dma-buf: move dma-buf symbols into the DMA_BUF module namespaceGreg Kroah-Hartman2021-10-251-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to better track where in the kernel the dma-buf code is used, put the symbols in the namespace DMA_BUF and modify all users of the symbols to properly import the namespace to not break the build at the same time. Now the output of modinfo shows the use of these symbols, making it easier to watch for users over time: $ modinfo drivers/misc/fastrpc.ko | grep import import_ns: DMA_BUF Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com> Cc: David Airlie <airlied@linux.ie> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: dri-devel@lists.freedesktop.org Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Alex Deucher <alexander.deucher@amd.com> Link: https://lore.kernel.org/r/20211010124628.17691-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flagSumit Garg2021-07-211-2/+2
| | | | | | | | | | | | | | | | | | | Currently TEE_SHM_DMA_BUF flag has been inappropriately used to not register shared memory allocated for private usage by underlying TEE driver: OP-TEE in this case. So rather add a new flag as TEE_SHM_PRIV that can be utilized by underlying TEE drivers for private allocation and usage of shared memory. With this corrected, allow tee_shm_alloc_kernel_buf() to allocate a shared memory region without the backing of dma-buf. Cc: stable@vger.kernel.org Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Co-developed-by: Tyler Hicks <tyhicks@linux.microsoft.com> Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com> Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: add tee_shm_alloc_kernel_buf()Jens Wiklander2021-07-211-0/+18
| | | | | | | | | | | Adds a new function tee_shm_alloc_kernel_buf() to allocate shared memory from a kernel driver. This function can later be made more lightweight by unnecessary dma-buf export. Cc: stable@vger.kernel.org Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: convert get_user_pages() --> pin_user_pages()John Hubbard2020-08-251-13/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This code was using get_user_pages*(), in a "Case 2" scenario (DMA/RDMA), using the categorization from [1]. That means that it's time to convert the get_user_pages*() + put_page() calls to pin_user_pages*() + unpin_user_pages() calls. Factor out a new, small release_registered_pages() function, in order to consolidate the logic for discerning between TEE_SHM_USER_MAPPED and TEE_SHM_KERNEL_MAPPED pages. This also absorbs the kfree() call that is also required there. There is some helpful background in [2]: basically, this is a small part of fixing a long-standing disconnect between pinning pages, and file systems' use of those pages. [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ Cc: Jens Wiklander <jens.wiklander@linaro.org> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: tee-dev@lists.linaro.org Cc: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linaro-mm-sig@lists.linaro.org Signed-off-by: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* Merge tag 'tee-smatch-for-5.8' of ↵Arnd Bergmann2020-05-251-2/+1
|\ | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers tee: remove unnecessary NULL check in tee_shm_alloc() * tag 'tee-smatch-for-5.8' of git://git.linaro.org/people/jens.wiklander/linux-tee: tee: remove unnecessary NULL check in tee_shm_alloc() Link: https://lore.kernel.org/r/20200504181333.GA11018@jade Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| * tee: remove unnecessary NULL check in tee_shm_alloc()Dan Carpenter2020-04-201-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Smatch complains that "ctx" isn't checked consistently: drivers/tee/tee_shm.c:164 tee_shm_alloc() warn: variable dereferenced before check 'ctx' (see line 95) I audited the callers and "ctx" can't be NULL so the check can be removed. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* | tee: enable support to register kernel memorySumit Garg2020-04-201-3/+25
|/ | | | | | | | Enable support to register kernel memory reference with TEE. This change will allow TEE bus drivers to register memory references. Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: tee_shm_op_mmap(): use TEE_SHM_USER_MAPPEDJens Wiklander2020-02-281-1/+1
| | | | | | | | tee_shm_op_mmap() uses the TEE_SHM_USER_MAPPED flag instead of the TEE_SHM_REGISTER flag to tell if a shared memory object is originating from registered user space memory. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: remove redundant teedev in struct tee_shmJens Wiklander2020-02-281-5/+2
| | | | | | | The ctx element in struct tee_shm is always valid. So remove the now redundant teedev element. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: don't assign shm id for private shmsJens Wiklander2020-02-281-13/+18
| | | | | | | | Private shared memory object must not be referenced from user space. To guarantee that, don't assign an id to shared memory objects which are driver private. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: remove unused tee_shm_priv_alloc()Jens Wiklander2020-02-281-31/+2
| | | | | | | tee_shm_priv_alloc() isn't useful in the current state and it's also not not used so remove it. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* tee: remove linked list of struct tee_shmJens Wiklander2020-02-281-11/+1
| | | | | | | Removes list_shm from struct tee_context since the linked list isn't used any longer. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* drm/tee_shm: Drop dma_buf_k(unmap) supportDaniel Vetter2019-11-251-6/+0
| | | | | | | | | | | | | | There's no in-tree users anymore. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Jens Wiklander <jens.wiklander@linaro.org> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jens Wiklander <jens.wiklander@linaro.org> Cc: tee-dev@lists.linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20191118103536.17675-13-daniel.vetter@ffwll.ch
* tee/shm: untag user pointers in tee_shm_registerAndrey Konovalov2019-09-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is a part of a series that extends kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tee_shm_register()->optee_shm_unregister()->check_mem_type() uses provided user pointers for vma lookups (via __check_mem_type()), which can only by done with untagged pointers. Untag user pointers in this function. Link: http://lkml.kernel.org/r/4b993f33196b3566ac81285ff8453219e2079b45.1563904656.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Jens Wiklander <jens.wiklander@linaro.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Eric Auger <eric.auger@redhat.com> Cc: Felix Kuehling <Felix.Kuehling@amd.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282Thomas Gleixner2019-06-051-10/+1
| | | | | | | | | | | | | | | | | | | | | | | | | 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 <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mm/gup: change GUP fast to use flags rather than a write 'bool'Ira Weiny2019-05-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To facilitate additional options to get_user_pages_fast() change the singular write parameter to be gup_flags. This patch does not change any functionality. New functionality will follow in subsequent patches. Some of the get_user_pages_fast() call sites were unchanged because they already passed FOLL_WRITE or 0 for the write parameter. NOTE: It was suggested to change the ordering of the get_user_pages_fast() arguments to ensure that callers were converted. This breaks the current GUP call site convention of having the returned pages be the final parameter. So the suggestion was rejected. Link: http://lkml.kernel.org/r/20190328084422.29911-4-ira.weiny@intel.com Link: http://lkml.kernel.org/r/20190317183438.2057-4-ira.weiny@intel.com Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Mike Marshall <hubcap@omnibond.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'drm-misc-next-2018-06-21' of ↵Dave Airlie2018-06-221-6/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for 4.19: UAPI Changes: - Add writeback connector (Brian Starkey/Liviu Dudau) - Add "content type" property to HDMI connectors (Stanislav Lisovskiy) Cross-subsystem Changes: - some devicetree Docs update - fix compile breakage on ION due to the dma-buf cleanups (Christian König) Core Changes: - Reject over-sized allocation requests early (Chris Wilson) - gem-fb-helper: Always do implicit sync (Daniel Vetter) - dma-buf cleanups (Christian König) Driver Changes: - Fixes for the otm8009a panel driver (Philippe Cornu) - Add Innolux TV123WAM panel driver support (Sandeep Panda) - Move GEM BO to drm_framebuffer in few drivers (Daniel Stone) - i915 pinning improvements (Chris Wilson) - Stop consulting plane->fb/crtc in a few drivers (Ville Syrjälä) Signed-off-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180621105428.GA20795@juma
| * dma-buf: remove kmap_atomic interfaceChristian König2018-06-201-6/+0
| | | | | | | | | | | | | | | | | | | | Neither used nor correctly implemented anywhere. Just completely remove the interface. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://patchwork.freedesktop.org/patch/226645/
* | tee: shm: fix use-after-free via temporarily dropped referenceJann Horn2018-05-071-2/+3
|/ | | | | | | | | | | | Bump the file's refcount before moving the reference into the fd table, not afterwards. The old code could drop the file's refcount to zero for a short moment before calling get_file() via get_dma_buf(). This code can only be triggered on ARM systems that use Linaro's OP-TEE. Fixes: 967c9cca2cc5 ("tee: generic TEE subsystem") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
* 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: add start argument to shm_register callbackJens Wiklander2017-12-281-1/+1
| | | | | | | 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: 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 Babchuk2017-12-151-0/+7
| | | | | | | | 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: add register user memoryJens Wiklander2017-12-151-26/+180
| | | | | | | | | 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 Wiklander2017-12-151-4/+4
| | | | | | | | | 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>
* 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>
* 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: generic TEE subsystemJens Wiklander2017-03-091-0/+358
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>
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-17 05:01:37 +0000