From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f41.google.com (mail-ej1-f41.google.com [209.85.218.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 64FE129A322 for ; Tue, 10 Jun 2025 13:16:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749561373; cv=none; b=MEGvXidBNHGASo+ow6iw+i2B82nvwr5bT+u+1bY+Uk8GPk717GywO1r9gpllKVMPtdxxKN1pM43v+npzthitPTCW81zIP/X8iNfhu2mGUAbnS8xCuwZnLhbjlgfTYYxWDMresPr8YQqkPUO/sQM+3OM8xL2agceMbvjn72Bjj3U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749561373; c=relaxed/simple; bh=PJ3ESN8T0nZKm3/Rh4SDGQHVnGPTX+y1PdgOdqX/m90=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LjTjSZ1ki1xcMzQgMK/drz+OxBgv03Ao4NweZ/C+opAgfUzAMqq5WyXauFvjSmwo0865aF5FGx4dmnCmMT3XgGS7NXkYzdkSB8zyaFAeEY9Iym1LV4hGwmQwldEtOEn++w/qMml5ppcAgWI8Ju7pbDnxJ3nctYF9Gg4McKu4iyU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=Ci9jkQ9l; arc=none smtp.client-ip=209.85.218.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Ci9jkQ9l" Received: by mail-ej1-f41.google.com with SMTP id a640c23a62f3a-ade5b8aab41so409871266b.0 for ; Tue, 10 Jun 2025 06:16:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1749561369; x=1750166169; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Ri4++88KyCAFFBsQpRdzKdsThABD6WsDtwqnK7XpHl8=; b=Ci9jkQ9lsya+7hXFsNi0IDqhJbfbBdRY2/hIVeTsVN0S+Pkvou+OFmz3Xwd7/a+DG/ mueE5M7s8tPx8UohWgzlPeTdtIXll70GSK4lwBeV/K03Ummd8PM9WLKDd2iB53af3e0Y H+6uvDVcx6Hrjryw3pjv6zDgf1BPKhG1RSbT5D3IllZYLfD2bDQgU4TP08wrZh20kbKV eJ86G64/xeqpiYEiZ6N+dNKpcD1tvtKdk23P5fLrCOA4yDdVDz98w8C6+u2e/dETk+CB QQibPsQW2uF6acfdGyGFcuSbaXyPm9slxAza0Ya2tj+BF+F5gV7J+DUGKr66/yRVBnBg 7yEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749561369; x=1750166169; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Ri4++88KyCAFFBsQpRdzKdsThABD6WsDtwqnK7XpHl8=; b=RNFOSDA7QRedUQElNDrSQr4+O9V8zisS9285p7YG5k7CTyb+6MFIn2vkeyfBQBovbK 4YPqQsWdP05eCfLkAL11AdSTRRAcmMLwD2ClYLDdEtlZZ8xvCA/31fbS7PXMTc6JJY8S TDJe1oJnhVvEeIcUWVmQQgMDFm++7joU+krXhJs5GfjKb8oJQf+/rhL2mEdy4eE6AGzq uw/lRU5xjbziON6xKd0mhEPAgPwWBzV5f1f7ISO4t3c26HIXlxuwsKSjRSOlOrXsjmc8 hqXfbE1ILzDyCOVQHllF9SF146PpS2VxTX3oOP/yB+5yGMuM12pOgjdbOxGmDor5Tqqn NRXQ== X-Gm-Message-State: AOJu0Yx4+M7p8zNODX5j5KqD3/vh5UUjPpaml5Vf8PuLyyrlnpBDMtVK +tCGGxjuPJoQHjC/cmDLZErkoIEHiSKF3VYKyVw2Pz/tZjW3aknym1GKu0szkfyrfhQ8ws6RMql lgiE2y/A= X-Gm-Gg: ASbGncvOfUFfoodev5Cy3Y5dbWVogHCXPkZJKCqXO+6YrjFsI2+4W1DnkonpDRiO3fy FUocsnBj+2D45qUV8aEEPLm1bosoMmbH868tFjlywLeVjC5EDjDUf0AHfMPl+twyI+L6zb3GB5U BEZ8xcInuZIsBYiTKX0WYZq9axXpuXUIzRcizA4fRcF/YcATmvt0v7eMy7h+NEfjCHnDRoKN2vu JynBst0zg9/ug9kmu5U4BbrfR6sYmEq1ip9VEp3FnJbxQlYOzUamLftD5wej43z90HvktTqx1C6 /Da/LMfib/2Kf73DEDN5VxCSameAwcDz5w26SwUs6RQ9SjcymeV4r3+Pg2oOgFdJLzuS/11eEO5 7ry7aC3t4XunyJIlVhdoSANSd/LSUbq6Wc2Nbu/U= X-Google-Smtp-Source: AGHT+IH+NqfO0eRJpBwx+OETPzlNHnv9dU7aYJP1gt7nx8Svz410+PQMt4+K+Y+L3GHIBYSzGjaBVg== X-Received: by 2002:a17:907:60d1:b0:adb:2462:d921 with SMTP id a640c23a62f3a-ade1a9160c3mr1613066266b.5.1749561369005; Tue, 10 Jun 2025 06:16:09 -0700 (PDT) Received: from rayden.urgonet (h-98-128-140-123.A175.priv.bahnhof.se. [98.128.140.123]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ade3206a1efsm643651666b.67.2025.06.10.06.16.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Jun 2025 06:16:08 -0700 (PDT) From: Jens Wiklander To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, op-tee@lists.trustedfirmware.org, linux-arm-kernel@lists.infradead.org Cc: Olivier Masse , Thierry Reding , Yong Wu , Sumit Semwal , Benjamin Gaignard , Brian Starkey , John Stultz , "T . J . Mercier" , =?UTF-8?q?Christian=20K=C3=B6nig?= , Sumit Garg , Matthias Brugger , AngeloGioacchino Del Regno , azarrabi@qti.qualcomm.com, Simona Vetter , Daniel Stone , Rouven Czerwinski , robin.murphy@arm.com, Jens Wiklander Subject: [PATCH v10 0/9] TEE subsystem for protected dma-buf allocations Date: Tue, 10 Jun 2025 15:13:44 +0200 Message-ID: <20250610131600.2972232-1-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, This patch set allocates the protected DMA-bufs from a DMA-heap instantiated from the TEE subsystem. The TEE subsystem handles the DMA-buf allocations since it is the TEE (OP-TEE, AMD-TEE, TS-TEE, or perhaps a future QTEE) which sets up the protection for the memory used for the DMA-bufs. The DMA-heap uses a protected memory pool provided by the backend TEE driver, allowing it to choose how to allocate the protected physical memory. The allocated DMA-bufs must be imported with a new TEE_IOC_SHM_REGISTER_FD before they can be passed as arguments when requesting services from the secure world. Three use-cases (Secure Video Playback, Trusted UI, and Secure Video Recording) have been identified so far to serve as examples of what can be expected. The use-cases have predefined DMA-heap names, "protected,secure-video", "protected,trusted-ui", and "protected,secure-video-record". The backend driver registers protected memory pools for the use-cases it supports. Each use-case has its own protected memory pool since different use-cases require isolation from different parts of the system. A protected memory pool can be based on a static carveout instantiated while probing the TEE backend driver, or dynamically allocated from CMA (dma_alloc_pages()) and made protected as needed by the TEE. This can be tested on a RockPi 4B+ with the following steps: repo init -u https://github.com/jenswi-linaro/manifest.git -m rockpi4.xml \ -b prototype/sdp-v10 repo sync -j8 cd build make toolchains -j$(nproc) make all -j$(nproc) # Copy ../out/rockpi4.img to an SD card and boot the RockPi from that # Connect a monitor to the RockPi # login and at the prompt: gst-launch-1.0 videotestsrc ! \ aesenc key=1f9423681beb9a79215820f6bda73d0f \ iv=e9aa8e834d8d70b7e0d254ff670dd718 serialize-iv=true ! \ aesdec key=1f9423681beb9a79215820f6bda73d0f ! \ kmssink The aesdec module has been hacked to use an OP-TEE TA to decrypt the stream into protected DMA-bufs which are consumed by the kmssink. The primitive QEMU tests from previous patch sets can be tested on RockPi in the same way using: xtest --sdp-basic The primitive tests are tested on QEMU with the following steps: repo init -u https://github.com/jenswi-linaro/manifest.git -m qemu_v8.xml \ -b prototype/sdp-v10 repo sync -j8 cd build make toolchains -j$(nproc) make SPMC_AT_EL=1 all -j$(nproc) make SPMC_AT_EL=1 run-only # login and at the prompt: xtest --sdp-basic The SPMC_AT_EL=1 parameter configures the build with FF-A and an SPMC at S-EL1 inside OP-TEE. The parameter can be changed to SPMC_AT_EL=n to test without FF-A using the original SMC ABI instead. Please remember to do %make arm-tf-clean for TF-A to be rebuilt properly using the new configuration. https://optee.readthedocs.io/en/latest/building/prerequisites.html list dependencies required to build the above. The primitive tests are pretty basic, mostly checking that a Trusted Application in the secure world can access and manipulate the memory. There are also some negative tests for out of bounds buffers, etc. Thanks, Jens Changes since V9: * Adding Sumit's R-B to "optee: sync secure world ABI headers" * Update commit message as requested for "dma-buf: dma-heap: export declared functions". * In "tee: implement protected DMA-heap": - add the hidden config option TEE_DMABUF_HEAPS to tell if the TEE subsystem can support DMA heaps - add a pfn_valid() to check that the passed physical address can be used by __pfn_to_page() and friends - remove the memremap() call, the caller is should do that instead if needed * In "tee: add tee_shm_alloc_dma_mem()" guard the calls to dma_alloc_pages() and dma_free_pages() with TEE_DMABUF_HEAPS to avoid linking errors in some configurations * In "optee: support protected memory allocation": - add the hidden config option OPTEE_STATIC_PROTMEM_POOL to tell if the driver can support a static protected memory pool - optee_protmem_pool_init() is slightly refactored to make the patches that follow easier - Call devm_memremap() before calling tee_protmem_static_pool_alloc() Changes since V8: * Using dma_alloc_pages() instead of cma_alloc() so the direct dependency on CMA can be removed together with the patches "cma: export cma_alloc() and cma_release()" and "dma-contiguous: export dma_contiguous_default_area". The patch * Renaming the patch "tee: add tee_shm_alloc_cma_phys_mem()" to "tee: add tee_shm_alloc_dma_mem()" * Setting DMA mask for the OP-TEE TEE device based on input from the secure world instead of relying on the parent device so following patches are removed: "tee: tee_device_alloc(): copy dma_mask from parent device" and "optee: pass parent device to tee_device_alloc()". * Adding Sumit Garg's R-B to "tee: refactor params_from_user()" * In the patch "tee: implement protected DMA-heap", map the physical memory passed to tee_protmem_static_pool_alloc(). Changes since V7: * Adding "dma-buf: dma-heap: export declared functions", "cma: export cma_alloc() and cma_release()", and "dma-contiguous: export dma_contiguous_default_area" to export the symbols needed to keep the TEE subsystem as a load module. * Removing CONFIG_TEE_DMABUF_HEAP and CONFIG_TEE_CMA since they aren't needed any longer. * Addressing review comments in "optee: sync secure world ABI headers" * Better align protected memory pool initialization between the smc-abi and ffa-abi parts of the optee driver. * Removing the patch "optee: account for direction while converting parameters" Changes since V6: * Restricted memory is now known as protected memory since to use the same term as https://docs.vulkan.org/guide/latest/protected.html. Update all patches to consistently use protected memory. * In "tee: implement protected DMA-heap" add the hidden config option TEE_DMABUF_HEAP to tell if the DMABUF_HEAPS functions are available for the TEE subsystem * Adding "tee: refactor params_from_user()", broken out from the patch "tee: new ioctl to a register tee_shm from a dmabuf file descriptor" * For "tee: new ioctl to a register tee_shm from a dmabuf file descriptor": - Update commit message to mention protected memory - Remove and open code tee_shm_get_parent_shm() in param_from_user_memref() * In "tee: add tee_shm_alloc_cma_phys_mem" add the hidden config option TEE_CMA to tell if the CMA functions are available for the TEE subsystem * For "tee: tee_device_alloc(): copy dma_mask from parent device" and "optee: pass parent device to tee_device_alloc", added Reviewed-by: Sumit Garg Changes since V5: * Removing "tee: add restricted memory allocation" and "tee: add TEE_IOC_RSTMEM_FD_INFO" * Adding "tee: implement restricted DMA-heap", "tee: new ioctl to a register tee_shm from a dmabuf file descriptor", "tee: add tee_shm_alloc_cma_phys_mem()", "optee: pass parent device to tee_device_alloc()", and "tee: tee_device_alloc(): copy dma_mask from parent device" * The two TEE driver OPs "rstmem_alloc()" and "rstmem_free()" are replaced with a struct tee_rstmem_pool abstraction. * Replaced the the TEE_IOC_RSTMEM_ALLOC user space API with the DMA-heap API Changes since V4: * Adding the patch "tee: add TEE_IOC_RSTMEM_FD_INFO" needed by the GStreamer demo * Removing the dummy CPU access and mmap functions from the dma_buf_ops * Fixing a compile error in "optee: FF-A: dynamic restricted memory allocation" reported by kernel test robot Changes since V3: * Make the use_case and flags field in struct tee_shm u32's instead of u16's * Add more description for TEE_IOC_RSTMEM_ALLOC in the header file * Import namespace DMA_BUF in module tee, reported by lkp@intel.com * Added a note in the commit message for "optee: account for direction while converting parameters" why it's needed * Factor out dynamic restricted memory allocation from "optee: support restricted memory allocation" into two new commits "optee: FF-A: dynamic restricted memory allocation" and "optee: smc abi: dynamic restricted memory allocation" * Guard CMA usage with #ifdef CONFIG_CMA, effectively disabling dynamic restricted memory allocate if CMA isn't configured Changes since the V2 RFC: * Based on v6.12 * Replaced the flags for SVP and Trusted UID memory with a u32 field with unique id for each use case * Added dynamic allocation of restricted memory pools * Added OP-TEE ABI both with and without FF-A for dynamic restricted memory * Added support for FF-A with FFA_LEND Changes since the V1 RFC: * Based on v6.11 * Complete rewrite, replacing the restricted heap with TEE_IOC_RSTMEM_ALLOC Changes since Olivier's post [2]: * Based on Yong Wu's post [1] where much of dma-buf handling is done in the generic restricted heap * Simplifications and cleanup * New commit message for "dma-buf: heaps: add Linaro restricted dmabuf heap support" * Replaced the word "secure" with "restricted" where applicable Etienne Carriere (1): tee: new ioctl to a register tee_shm from a dmabuf file descriptor Jens Wiklander (8): optee: sync secure world ABI headers dma-buf: dma-heap: export declared functions tee: implement protected DMA-heap tee: refactor params_from_user() tee: add tee_shm_alloc_dma_mem() optee: support protected memory allocation optee: FF-A: dynamic protected memory allocation optee: smc abi: dynamic protected memory allocation drivers/dma-buf/dma-heap.c | 3 + drivers/tee/Kconfig | 5 + drivers/tee/Makefile | 1 + drivers/tee/optee/Kconfig | 5 + drivers/tee/optee/Makefile | 1 + drivers/tee/optee/core.c | 10 + drivers/tee/optee/ffa_abi.c | 147 +++++++++- drivers/tee/optee/optee_ffa.h | 27 +- drivers/tee/optee/optee_msg.h | 84 +++++- drivers/tee/optee/optee_private.h | 15 +- drivers/tee/optee/optee_smc.h | 37 ++- drivers/tee/optee/protmem.c | 335 +++++++++++++++++++++ drivers/tee/optee/smc_abi.c | 142 ++++++++- drivers/tee/tee_core.c | 155 +++++++--- drivers/tee/tee_heap.c | 472 ++++++++++++++++++++++++++++++ drivers/tee/tee_private.h | 16 + drivers/tee/tee_shm.c | 189 +++++++++++- include/linux/tee_core.h | 71 +++++ include/linux/tee_drv.h | 10 + include/uapi/linux/tee.h | 31 ++ 20 files changed, 1689 insertions(+), 67 deletions(-) create mode 100644 drivers/tee/optee/protmem.c create mode 100644 drivers/tee/tee_heap.c base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca -- 2.43.0