On Fri, Aug 19, 2022 at 01:54:31PM +0530, Sumit Garg wrote: > Hi Olivier, > > On Fri, 12 Aug 2022 at 20:01, Olivier Masse <olivier.masse@xxxxxxx> wrote: > > > > Add a new ioctl called TEE_IOC_SHM_REGISTER_FD to register a > > shared memory from a dmabuf file descriptor. > > This new ioctl will allow the Linux Kernel to register a buffer > > to be used by the Secure Data Path OPTEE OS feature. > > > > Please find more information here: > > https://static.linaro.org/connect/san19/presentations/san19-107.pdf > > > > Patch tested on Hikey 6220. > > > > AFAIU, for the OP-TEE SDP feature to work you need to have a DMA-BUF > heap driver for allocating secure buffers through exposed chardev: > "/dev/dma_heap/sdp". Have you tested it with some out-of-tree driver > as I can't find it upstream? Also, do you plan to push that upstream > as well? > > BTW, please add a changelog while sending newer patch-set versions. Also after the huge discussion last year dma-buf are agreed to be under the "you need an open source userspace for any new uapi using them" rule that all gpu drivers are under. Does this exist here? -Daniel > > -Sumit > > > Etienne Carriere (1): > > tee: new ioctl to a register tee_shm from a dmabuf file descriptor > > > > drivers/tee/tee_core.c | 38 +++++++++++++++ > > drivers/tee/tee_shm.c | 99 +++++++++++++++++++++++++++++++++++++++- > > include/linux/tee_drv.h | 11 +++++ > > include/uapi/linux/tee.h | 29 ++++++++++++ > > 4 files changed, 175 insertions(+), 2 deletions(-) > > > > -- > > 2.25.0 > > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
