# SPDX-License-Identifier: GPL-2.0-onlymenu "DMABUF options" config SYNC_FILE	bool "Explicit Synchronization Framework"	default n	select DMA_SHARED_BUFFER	help	  The Sync File Framework adds explicit synchronization via	  userspace. It enables send/receive 'struct dma_fence' objects to/from	  userspace via Sync File fds for synchronization between drivers via	  userspace components. It has been ported from Android. 	  The first and main user for this is graphics in which a fence is	  associated with a buffer. When a job is submitted to the GPU a fence	  is attached to the buffer and is transferred via userspace, using Sync	  Files fds, to the DRM driver for example. More details at	  Documentation/driver-api/sync_file.rst. config SW_SYNC	bool "Sync File Validation Framework"	default n	depends on SYNC_FILE	depends on DEBUG_FS	help	  A sync object driver that uses a 32bit counter to coordinate	  synchronization.  Useful when there is no hardware primitive backing	  the synchronization. 	  WARNING: improper use of this can result in deadlocking kernel	  drivers from userspace. Intended for test and debug only. config UDMABUF	bool "userspace dmabuf misc driver"	default n	depends on DMA_SHARED_BUFFER	depends on MEMFD_CREATE || COMPILE_TEST	depends on MMU	help	  A driver to let userspace turn memfd regions into dma-bufs.	  Qemu can use this to create host dmabufs for guest framebuffers. config DMABUF_DEBUG	bool "DMA-BUF debug checks"	depends on DMA_SHARED_BUFFER	default y if DEBUG	help	  This option enables additional checks for DMA-BUF importers and	  exporters. Specifically it validates that importers do not peek at the	  underlying struct page when they import a buffer. config DMABUF_KUNIT_TEST	tristate "KUnit tests for DMA-BUF" if !KUNIT_ALL_TESTS	depends on KUNIT	select DMA_SHARED_BUFFER	default KUNIT_ALL_TESTS	help	   Enable kunit tests for DMA-BUF menuconfig DMABUF_HEAPS	bool "DMA-BUF Userland Memory Heaps"	select DMA_SHARED_BUFFER	help	  Choose this option to enable the DMA-BUF userland memory heaps.	  This options creates per heap chardevs in /dev/dma_heap/ which	  allows userspace to allocate dma-bufs that can be shared	  between drivers. source "drivers/dma-buf/heaps/Kconfig" endmenu