4 bool "Explicit Synchronization Framework"
6 select DMA_SHARED_BUFFER
8 The Sync File Framework adds explicit syncronization via
9 userspace. It enables send/receive 'struct dma_fence' objects to/from
10 userspace via Sync File fds for synchronization between drivers via
11 userspace components. It has been ported from Android.
13 The first and main user for this is graphics in which a fence is
14 associated with a buffer. When a job is submitted to the GPU a fence
15 is attached to the buffer and is transferred via userspace, using Sync
16 Files fds, to the DRM driver for example. More details at
17 Documentation/sync_file.txt.
20 bool "Sync File Validation Framework"
25 A sync object driver that uses a 32bit counter to coordinate
26 synchronization. Useful when there is no hardware primitive backing
29 WARNING: improper use of this can result in deadlocking kernel
30 drivers from userspace. Intended for test and debug only.
33 bool "userspace dmabuf misc driver"
35 depends on DMA_SHARED_BUFFER
36 depends on MEMFD_CREATE || COMPILE_TEST
38 A driver to let userspace turn memfd regions into dma-bufs.
39 Qemu can use this to create host dmabufs for guest framebuffers.