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1 # SPDX-License-Identifier: GPL-2.0-only
11 userspace via Sync File fds for synchronization between drivers via
14 The first and main user for this is graphics in which a fence is
18 Documentation/driver-api/sync_file.rst.
30 WARNING: improper use of this can result in deadlocking kernel
40 A driver to let userspace turn memfd regions into dma-bufs.
44 bool "Move notify between drivers (EXPERIMENTAL)"
48 Don't pin buffers if the dynamic DMA-buf interface is available on
51 through DMA-buf.
53 execution context and memory management between drivers.
56 bool "DMA-BUF debug checks"
60 This option enables additional checks for DMA-BUF importers and
65 tristate "Selftests for the dma-buf interfaces"
70 bool "DMA-BUF Userland Memory Heaps"
73 Choose this option to enable the DMA-BUF userland memory heaps.
74 This options creates per heap chardevs in /dev/dma_heap/ which
75 allows userspace to allocate dma-bufs that can be shared
76 between drivers.
79 bool "DMA-BUF sysfs statistics (DEPRECATED)"
82 Choose this option to enable DMA-BUF sysfs statistics
83 in location /sys/kernel/dmabuf/buffers.
86 statistics for the DMA-BUF with the unique inode number
91 in quite some performance problems.
93 source "drivers/dma-buf/heaps/Kconfig"