Purpose of these patches is to add a new dma-buf heap: linaro,secure-heap Linaro OPTEE OS Secure Data Path feature is relying on a reserved memory defined at Linux Kernel level and OPTEE OS level. From Linux Kernel side, heap management is using dma-buf heaps interface.
Olivier Masse (3): dma-buf: heaps: add Linaro secure dmabuf heap support dt-bindings: reserved-memory: add linaro,secure-heap plat-hikey: Add linaro,secure-heap compatible
.../reserved-memory/linaro,secure-heap.yaml | 56 +++ .../arm64/boot/dts/hisilicon/hi6220-hikey.dts | 11 + arch/arm64/configs/defconfig | 2 + drivers/dma-buf/heaps/Kconfig | 9 + drivers/dma-buf/heaps/Makefile | 1 + drivers/dma-buf/heaps/secure_heap.c | 357 ++++++++++++++++++ 6 files changed, 436 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/linaro,secure-heap.yaml create mode 100644 drivers/dma-buf/heaps/secure_heap.c