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fwctl is a new subsystem intended to bring some common rules and order to the growing pattern of exposing a secure FW interface directly to userspace. Unlike existing places like RDMA/DRM/VFIO/uacce that are exposing a device for datapath operations fwctl is focused on debugging, configuration and provisioning of the device. It will not have the necessary features like interrupt delivery to support a datapath. This concept is similar to the long standing practice in the "HW" RAID space of having a device specific misc device to manage the RAID controller FW. fwctl generalizes this notion of a companion debug and management interface that goes along with a dataplane implemented in an appropriate subsystem. There have been three LWN articles written discussing various aspects of this: https://lwn.net/Articles/955001/ https://lwn.net/Articles/969383/ https://lwn.net/Articles/990802/ This pull requests includes three drivers to launch the subsystem: - CXL provides a vendor scheme for executing commands and a way to learn the 'command effects' (ie the security properties) of such commands. The fwctl driver allows access to these mechanism within the fwctl security model - mlx5 is family of networking products, the driver supports all current Mellanox HW still receiving FW feature updates. This includes RDMA multiprotocol NICs like ConnectX and the Bluefield family of Smart NICs. - AMD/Pensando Distributed Services card is a multi protocol Smart NIC with a multi PCI function design. fwctl works on the management PCI function following a 'command effects' model similar to CXL. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRRRCHOFoQz/8F5bUaFwuHvBreFYQUCZ939zQAKCRCFwuHvBreF YdOoAQCJq59/UC7lXU+sOsR6LISaDVTT5jAweBo0o036P9+DNAEA1iQdZ/GK2yCJ Ub33Xo9L+hzIpIbCouI3BtCXqymybAg= =f5YG -----END PGP SIGNATURE----- Merge tag 'for-linus-fwctl' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma Pull fwctl subsystem from Jason Gunthorpe: "fwctl is a new subsystem intended to bring some common rules and order to the growing pattern of exposing a secure FW interface directly to userspace. Unlike existing places like RDMA/DRM/VFIO/uacce that are exposing a device for datapath operations fwctl is focused on debugging, configuration and provisioning of the device. It will not have the necessary features like interrupt delivery to support a datapath. This concept is similar to the long standing practice in the "HW" RAID space of having a device specific misc device to manage the RAID controller FW. fwctl generalizes this notion of a companion debug and management interface that goes along with a dataplane implemented in an appropriate subsystem. There have been three LWN articles written discussing various aspects of this: https://lwn.net/Articles/955001/ https://lwn.net/Articles/969383/ https://lwn.net/Articles/990802/ This includes three drivers to launch the subsystem: - CXL provides a vendor scheme for executing commands and a way to learn the 'command effects' (ie the security properties) of such commands. The fwctl driver allows access to these mechanism within the fwctl security model - mlx5 is family of networking products, the driver supports all current Mellanox HW still receiving FW feature updates. This includes RDMA multiprotocol NICs like ConnectX and the Bluefield family of Smart NICs. - AMD/Pensando Distributed Services card is a multi protocol Smart NIC with a multi PCI function design. fwctl works on the management PCI function following a 'command effects' model similar to CXL" * tag 'for-linus-fwctl' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (30 commits) pds_fwctl: add Documentation entries pds_fwctl: add rpc and query support pds_fwctl: initial driver framework pds_core: add new fwctl auxiliary_device pds_core: specify auxiliary_device to be created pds_core: make pdsc_auxbus_dev_del() void cxl: Fixup kdoc issues for include/cxl/features.h fwctl/cxl: Add documentation to FWCTL CXL cxl/test: Add Set Feature support to cxl_test cxl/test: Add Get Feature support to cxl_test cxl: Add support to handle user feature commands for set feature cxl: Add support to handle user feature commands for get feature cxl: Add support for fwctl RPC command to enable CXL feature commands cxl: Move cxl feature command structs to user header cxl: Add FWCTL support to CXL mlx5: Create an auxiliary device for fwctl_mlx5 fwctl/mlx5: Support for communicating with mlx5 fw fwctl: Add documentation fwctl: FWCTL_RPC to execute a Remote Procedure Call to device firmware taint: Add TAINT_FWCTL ...
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=====================================
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The Linux kernel user-space API guide
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=====================================
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.. _man-pages: https://www.kernel.org/doc/man-pages/
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While much of the kernel's user-space API is documented elsewhere
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(particularly in the man-pages_ project), some user-space information can
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also be found in the kernel tree itself. This manual is intended to be the
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place where this information is gathered.
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System calls
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============
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.. toctree::
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:maxdepth: 1
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unshare
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futex2
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ebpf/index
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ioctl/index
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mseal
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Security-related interfaces
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===========================
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.. toctree::
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:maxdepth: 1
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no_new_privs
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seccomp_filter
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landlock
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lsm
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mfd_noexec
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spec_ctrl
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tee
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check_exec
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Devices and I/O
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===============
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.. toctree::
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:maxdepth: 1
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accelerators/ocxl
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dma-buf-heaps
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dma-buf-alloc-exchange
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fwctl/index
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gpio/index
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iommufd
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media/index
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dcdbas
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vduse
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isapnp
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Everything else
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===============
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.. toctree::
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:maxdepth: 1
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ELF
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netlink/index
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sysfs-platform_profile
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vduse
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futex2
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perf_ring_buffer
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ntsync
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.. only:: subproject and html
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Indices
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=======
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* :ref:`genindex`
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