Hi, This patch set is based on top of Yong Wu's restricted heap patch set [1]. It's also a continuation on Olivier's Add dma-buf secure-heap patch set [2]. The Linaro restricted heap uses genalloc in the kernel to manage the heap carvout. This is a difference from the Mediatek restricted heap which relies on the secure world to manage the carveout. I've tried to adress the comments on [2], but [1] introduces changes so I'm afraid I've had to skip some comments. This can be tested on QEMU with the following steps: repo init -u https://github.com/jenswi-linaro/manifest.git -m qemu_v8.xml \ -b prototype/sdp-v1 repo sync -j8 cd build make toolchains -j4 make all -j$(nproc) make run-only # login and at the prompt: xtest --sdp-basic https://optee.readthedocs.io/en/latest/building/prerequisites.html list dependencies needed to build the above. The tests are pretty basic, mostly checking that a Trusted Application in the secure world can access and manipulate the memory. Cheers, Jens [1] https://lore.kernel.org/dri-devel/20240515112308.10171-1-yong.wu@xxxxxxxxxxxx/ [2] https://lore.kernel.org/lkml/20220805135330.970-1-olivier.masse@xxxxxxx/ 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 (2): dma-buf: heaps: restricted_heap: add no_map attribute dma-buf: heaps: add Linaro restricted dmabuf heap support Olivier Masse (1): dt-bindings: reserved-memory: add linaro,restricted-heap .../linaro,restricted-heap.yaml | 56 ++++++ drivers/dma-buf/heaps/Kconfig | 10 ++ drivers/dma-buf/heaps/Makefile | 1 + drivers/dma-buf/heaps/restricted_heap.c | 17 +- drivers/dma-buf/heaps/restricted_heap.h | 2 + .../dma-buf/heaps/restricted_heap_linaro.c | 165 ++++++++++++++++++ drivers/tee/tee_core.c | 38 ++++ drivers/tee/tee_shm.c | 104 ++++++++++- include/linux/tee_drv.h | 11 ++ include/uapi/linux/tee.h | 29 +++ 10 files changed, 426 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/reserved-memory/linaro,restricted-heap.yaml create mode 100644 drivers/dma-buf/heaps/restricted_heap_linaro.c -- 2.34.1
