===================================== The Linux kernel user-space API guide

.. _man-pages: https://www.kernel.org/doc/man-pages/

While much of the kernel's user-space API is documented elsewhere (particularly in the man-pages_ project), some user-space information can also be found in the kernel tree itself. This manual is intended to be the place where this information is gathered.

System calls

.. toctree:: :maxdepth: 1

unshare futex2 ebpf/index ioctl/index mseal rseq

Security-related interfaces

.. toctree:: :maxdepth: 1

no_new_privs seccomp_filter landlock lsm mfd_noexec spec_ctrl tee check_exec

Devices and I/O

.. toctree:: :maxdepth: 1

accelerators/ocxl dma-buf-heaps dma-buf-alloc-exchange fwctl/index gpio/index iommufd media/index dcdbas vduse isapnp

Everything else

.. toctree:: :maxdepth: 1

ELF liveupdate netlink/index sysfs-platform_profile vduse futex2 perf_ring_buffer ntsync