Linux 5.6 has been released on Sun, 29 Mar 2020.

Summary: This release adds Wireguard, an fast and secure VPN design that aims to replace other VPNs; initial support for USB 4; support for time namespaces; asynchronous SSD trimming in Btrfs; initial merge of the Multipath TCP support; support for VirtualBox guest shared folders; a simple file system to expose the zones of zoned storage devices as files; boot-time tracing, which lets to trace the boot-time process with all the features of ftrace; and bootconfig, created to configure boot-time tracing, which lets to extend the command line in a file attached to initrds. As always, there are many other new drivers and improvements.

1. Prominent features

1.1. WireGuard, a faster, simpler, secure VPN

WireGuard is a layer 3 secure networking tunnel. It aims to be faster, simpler, leaner, and more useful than IPsec, while avoiding the massive headache, and it intends to be considerably more performant than OpenVPN. Extensive documentation and description of the protocol and considerations, along with formal proofs of the cryptography, are available at wireguard.com

WireGuard aims to be as easy to configure and deploy as SSH. A VPN connection is made simply by exchanging very simple public keys – exactly like exchanging SSH keys – and all the rest is transparently handled by WireGuard. It is even capable of roaming between IP addresses. There is no need to manage connections, be concerned about state, manage daemons, or worry about what's under the hood. WireGuard presents an extremely basic yet powerful interface.

WireGuard uses state-of-the-art cryptography, like the Noise protocol framework, Curve25519, ChaCha20, !Poly1305, BLAKE2, SipHash24, HKDF, and secure trusted constructions. It makes conservative and reasonable choices and has been reviewed by cryptographers.

A combination of extremely high-speed cryptographic primitives and the fact that WireGuard lives inside the Linux kernel means that secure networking can be very high-speed. It is suitable for both small embedded devices like smartphones and fully loaded backbone routers.

Project site: wireguard.com

Technical whitepaper: wireguard.pdf

Recommended LWN articles: Virtual private networks with WireGuard, Whither WireGuard?, WireGuard and the crypto API

1.2. Initial USB 4 support

USB4 is a new version of the USB standard. Rather than an evolution of previous versions, this fourth version is pretty much the Thunderbolt 3 protocol, with a few changes. It is compatible with Thunderbolt 3, and backwards compatible with USB 3.2 and USB 2.0.

Linux already supported Thunderbolt 3; this release modifies the Thunderbolt stack to add initial Linux support for USB 4, at the same level as it had for Thunderbolt 3 devices, and support for USB 3.x tunnels.

1.3. Time Namespaces

This release adds another per-process namespace to kernel: a time namespace. This namespace is required mainly in the context of checkpoint/restore functionality, where monotonic and boottime clocks, widely used to measure time slices and set timers, have to be guaranteed that they never go backwards when a container is migrated to another machine. A time namespace can provide the correct behavior by having per-namespace offsets for those clocks, and it can also be useful for developer to test different time ranges without needing to reboot. As other namespaces, a new time namespace can be used by issuing a unshare(CLONE_NEWTIME) system call, or other namespace related system calls such as clone3() or setns() .

Recommended LWN article: Time namespaces

1.4. Btrfs asynchronous SSD trimming

Solid-State storage drives benefit from being told when a disk block goes unused, for performance and wear-leveling reasons. This operation, called discard or trim, is done automatically by Btrfs: When a file is deleted, Btrfs notifies the drive that the blocks which belonged to the file are no longer being used. However, these notifications were done sychronously: the trim notifications were sent before ending the delete operation, which harms performance.

In this release, these notifications will be sent asynchronously. The actual discard IO requests have been moved out of transaction commit to a worker thread, improving commit latency.

1.5. Initial support for MultiPath TCP

MultiPath TCP (MPTCP) is a mechanism that allows to use multiple network links for a single TCP connection. For example, with MPTCP a phone could use both the WiFi and the 3G links for a single connection. This makes possible for the phone user to use the available bandwith in both links, or get disconnected from the WiFi network and keep using the 3G connection, without the connection being closed. MPTCP is also used in data centers, for performance and reliability reasons.

MPTCP is not a new technology, it has been available for a long time, and a Linux implementation has existed for over a decade, but it's only now that is getting upstreamed. In this release, only a part of the initial work is being introduced: MPTCP connection establishment, writing & reading MPTCP options on data packets, a sysctl to allow MPTCP per-namespace, and self tests. This is sufficient to establish and maintain a connection with a MPTCP peer, but will not yet allow or initiate establishment of additional MPTCP subflows. Other features will be introduced in the next versions.

Project page: www.multipath-tcp.org

Recommended LWN article: Upstreaming multipath TCP

1.6. Support for VirtualBox guest shared folders

VirtualBox hosts can share folders with guests, this release adds a new file system, vboxsf (for VirtualBox Shared Folder), which implements the Linux-guest side of this, allowing folders exported by the host to be mounted under Linux.

Note that this is a Virtualbox-specific solution, a more generic approach can be found in the form of virtio-fs

1.7. Zonefs, a file system for zoned storage devices

Zoned storage devices are divided into zones. Zones may have different types: Conventional zones, which have no access constraints; and Sequential zones, where reads can be random but must be written sequentially, and must be erased with a special command (zone reset) before rewriting.

This release adds zonefs, a very simple file system exposing zones of a zoned block device as files. Unlike a regular file system with zoned block device support, zonefs does not hide the sequential write constraint of zoned block devices to the user. The goal of zonefs is to simplify the implementation of zoned block device support in applications by replacing raw block device file accesses with a richer file API, avoiding relying on direct block device file ioctls which may be more obscure to developers.

Recommended LWN article: Accessing zoned block devices with zonefs

1.8. A new pidfd syscall, pidfd_getfd(2)

This release adds pidfd_getfd(2) , another system call of the pidfd family, designed for safe PID handling. This syscall allows for the retrieval of file descriptors from other processes, based on their pidfd. This is possible using ptrace, and injection of parasitic code to inject code which leverages SCM_RIGHTS to move file descriptors between a tracee and a tracer. Unfortunately, ptrace comes with a high cost of requiring the process to be stopped, and breaks debuggers. This does not require stopping the process under manipulation.

One reason to use this is to allow sandboxers to take actions on file descriptors on the behalf of another process. For example, this can be combined with seccomp-bpf's user notification to do on-demand fd extraction and take privileged actions. One such privileged action is binding a socket to a privileged port.

Recommended LWN article: Grabbing file descriptors with pidfd_getfd()

1.9. Extra Boot Config, for more complex boot configuration, and Boot tracing

Extra boot config allows admin to pass a tree-structured key-value list when booting up the kernel. It allows to expand the kernel command line in an efficient way, by appending additional boot configuration to a initrd file with a new tool, found at tools/bootconfig. This functionality has been implemented mainly for the use of boot tracing, which has also been added in this release.

With boot-time tracing is possible now to trace the boot-time process including device initialization with full features of ftrace including per-event filter and actions, histograms, kprobe-events and synthetic-events, and trace instances. This funcionality requires very verbose configuration, and the kernel command line is not enough, which is the reason behind the creation of the bootconfig functionality.

Bootconfig documentation: admin-guide/bootconfig.html

Boot-time tracing: trace/boottime-trace.html

1.10. DMA-BUF Heaps, a replacement for Android ION

This release adds dma-buf heaps, a framework which allows a unified userspace interface for dma-buf exporters, allowing userland to allocate specific types of memory for use in dma-buf sharing. Each heap is given its own device node, which a user can allocate a dma-buf fd from using the DMA_HEAP_IOC_ALLOC . This feature is an evoluton of the Android ION implementation, and the expectation is that people will eventually migrate to it.

Recommended LWN article: Destaging ION

2. Core (various)

(FEATURED) Introduce Time Namespaces, primarily to facilitate container migration commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

A mechanism to shield isolated tasks from managed interrupts: When the generated affinity mask of an interrupt spaws both housekeeping and isolated CPUs the interrupt could be routed to an isolated CPU which would then be disturbed by I/O submitted by a housekeeping CPU. A new sub-parameter managed_irq for the boot option isolcpus and the corresponding logic in the interrupt affinity selection code has been added, this mechanism ensures that as long as one housekeeping CPU is online in the assigned affinity mask the interrupt is routed to a housekeeping CPU commit

io_uring Support for fallocate(2), openat(2), and close(2) commit, commit, commit, commit, commit, commit Add non-vectored read(2)/write(2) commands commit and allow current file position offset reads/writes commit Support for statx(2) commit, commit Add support for epoll manipulation through io_uring, in particular epoll_ctl(2) commit, commit, commit Support for openat2(2) commit, commit, commit Support for madvise(2) and fadvise(2) commit, commit, commit Add support for send(2) and recv(2) commit Faster ring quiesce for fileset updates commit The application currently has no way of knowing if a given opcode is supported or not without having to try and issue one and see if we get -EINVAL or not. Add IORING_REGISTER_PROBE which fills in a structure with info on what it supported or not commit Support for registering personalities commit, commit Add support for max-sized clamping. Some applications like to start small in terms of ring size, and then ramp up as needed. This is a bit tricky to do currently, since we don't advertise the max ring size. This release adds IORING_SETUP_CLAMP . If set, and the values for SQ or CQ ring size exceed what we support, then clamp them at the max values instead of returning -EINVAL commit io_uring defaulted to always doing inline submissions, if at all possible. But for larger copies, even if the data is fully cached, that can take a long time. Add an IOSQE_ASYNC flag that the application can set on the SQE - if set, the kernel will ensure that we always go async for those kinds of requests commit, commit Support for io-wq backend sharing between "sibling" rings commit, commit Add IORING_REGISTER_EVENTFD_ASYNC , which works just like IORING_REGISTER_EVENTFD , except it only triggers eventfd notifications for events that happen from async completions (IRQ, or io-wq worker completions). Any completions inline from the submission itself will not trigger notifications commit Improve poll completion performance commit Optimise ctx's refs grabbing in io_uring commit, commit

(FEATURED) Extra Boot Config: Extra boot config allows admin to pass a tree-structured key-value list when booting up the kernel. This expands the kernel command line in an efficient way. Each key is described as a dot-jointed-words. And user can write the key-words in tree style commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

kunit: support building core/tests as modules commit, commit, commit, commit, commit, commit

open: introduce openat2(2) syscall, as a more robust version of the original openat(2) along with a few extensions that allow for safer path resolution commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

(FEATURED) Add a new pidfd syscall, pidfd_getfd(2). It introduces a mechanism to get file descriptors from other processes via pidfd. Although this can be achieved using SCM_RIGHTS , and parasitic code injection, this offers a more straightforward mechanism, with less overhead and complexity commit, commit, commit, commit

Task scheduler Extend uclamp constraints to influence wakeup CPU placement commit, commit, commit, commit, commit Load balance aggressively for SCHED_IDLE CPUs commit Make RT aware of heterogeneous systems (ie. Arm big.LITTLE) commit

pipe: use exclusive waits when reading or writing to avoid a nasty thundering herd problem when there are lots of readers waiting for data on a pipe commit

Build Add yes2modconfig (change answers from yes to mod if possible) and mod2yesconfig (change answers from mod to yes if possible) targets commit List all definitions of a symbol in help text commit

Documentation: Add a maintainer entry profile for documentation commit Add a document on how to contribute to the documentation commit



3. File systems

VBOXSF (FEATURED) Add VirtualBox guest shared folder (vboxfs) support. It allows folders exported by the VirtualBox host to be mounted under Linux commit

ZONEFS (FEATURED) New zonefs file system. Zonefs is a very simple file system exposing each zone of a zoned block device as a file commit, commit

BTRFS (FEATURED) Asynchronous discard support, enabled with mount option discard=async . Freed extents are not discarded immediatelly, but grouped together and trimmed later by a separate worker thread, improving commit latency. IO rate and request size can be tuned by sysfs files commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Export device state info in sysfs, eg. missing, writeable commit, commit, commit integrity checking: check leaf chunk item size, cross check against number of stripes commit and verify location key for DIR_ITEM/DIR_INDEX commit

CIFS Optimize opendir and save one roundtrip commit, commit, commit, commit Add extended attribute "system.cifs_ntsd" (and alias "system.smb3_ntsd") to allow for setting owner and DACL in the security descriptor. This is in addition to the existing "system.cifs_acl" and "system.smb3_acl" attributes that allow for setting DACL only. Add support for setting creation time and dos attributes commit Add support for fallocate mode 0 for non-sparse files commit Add SMB3 change notification support commit

EXT4 Scale performance of direct IO mixed read/write workload commit, commit, commit Optimize ext4 DIO overwrites commit Export information about first/last errors via /sys/fs/ext4/<dev> commit Simulate various I/O and checksum errors when reading metadata, for debugging commit, commit Allow ZERO_RANGE on encrypted files commit

NFS Add softreval mount option to let clients use cache if server goes down commit Support (client and server) for NFSv4.2 "inter" Server-Side Copy, ie. copy offload between different NFS servers. To use it, client and both servers must have support, the target server must be able to access the source server over NFSv4.2, and the target server must have the inter_copy_offload_enable module parameter set commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Allow to compile without UDP protocol support commit

FSCRYPT Prepare for directories that are both encrypted and casefolded commit, commit, commit, commit, commit, commit Extend the FS_IOC_ADD_ENCRYPTION_KEY ioctl to allow the raw key to be provided via a keyring key commit

FS-VERITY Implement readahead of Merkle tree pages commit Implement readahead for FS_IOC_ENABLE_VERITY commit

F2FS Support data compression commit Add f2fs stats to sysfs commit

ADFS Implement directory update support commit Add support for E and E+ floppy image formats commit

UBIFS Add support for FS_ENCRYPT_FL commit



4. Memory management

(FEATURED) DMA-BUF Heaps commit, commit, commit, commit, commit

memcg: Port hugetlb controller for cgroupsv2. The HugeTLB controller allows to limit the HugeTLB usage per control group and enforces the controller limit during page fault commit

prctl: Add PR_GET_IO_FLUSHER/PR_SET_IO_FLUSHER to support controlling memory reclaim. Daemons can use it after they have done their initial setup, and before they start to do allocations that are in the IO path. Both userspace block and FS threads can use it to avoid the allocation recursion and try to prevent from being throttled while writing out data to free up memory commit

Generic page table walk and kernel page table dump (ptdump) via debugfs commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Explicit user-space page pinning via pin_user_pages(), prerequisite to solving the problem of proper interactions between file-backed pages, and [R]DMA activities. See this LWN article. commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Fix the access of uninitialized memmaps when shrinking zones/nodes and when removing memory commit, commit, commit, commit, commit, commit

zswap: add allocation hysteresis and /sys/kernel/debug/zswap/accept_threhsold_percent commit

zram: try to avoid worst-case scenario when comparing pages that differ in last few bytes, by checking last int of a page first commit

5. Block layer

md raid1 io serialization commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

dm zoned: support zone sizes smaller than 128MiB commit crypt: Implement Elephant diffuser for Bitlocker compatibility commit writecache: improve performance of large linear writes on SSDs commit Add DM multipath queue_if_no_path_timeout_secs module param to allow timeout if path isn't reinstated. This allows users a kernel safety-net against IO hanging indefinitely commit

bcache: add readahead cache policy options via sysfs interface commit

6. Tracing, perf and BPF

BPF Introduce the BPF dispatcher, a mechanism to avoid indirect calls and helps to avoid repotlines performance hit. Recommended LWN article. commit, commit, commit, commit, commit, commit Introduce BPF STRUCT_OPS. It is an infra to allow implementing some specific kernel's function pointers in BPF. The first use case included in this series is to implement TCP congestion control algorithm in BPF (i.e. implement struct tcp_congestion_ops in BPF) commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Introduce batch ops that can be added to bpf maps to lookup/lookup_and_delete/update/delete more than 1 element at the time commit, commit, commit, commit, commit, commit, commit, commit, commit Emit audit messages upon successful prog load and unload commit Program extensions or dynamic re-linking commit, commit, commit Introduce static vs global functions and function by function verification, another step toward dynamic re-linking commit, commit, commit, commit, commit, commit Support for replacing cgroup-bpf programs attached with BPF_F_ALLOW_MULTI flag so that any program in a list can be updated to a new version without service interruption and order of programs can be preserved commit, commit, commit, commit, commit, commit Implements a new BPF feature probe, which increases the maximum program size to 1M commit, commit bpftool: Support dumping a map with btf_vmlinux_value_type_id commit, commit, commit, commit, commit libbpf: introduces an alternative and complimentary to existing libbpf API interface for working with BPF objects, maps, programs, and global data from userspace side. This approach is relying on code generation. bpftool produces a struct (a.k.a. skeleton) tailored and specific to provided BPF object file. It includes hard-coded fields and data structures for every map, program, link, and global data present. Altogether this approach significantly reduces amount of userspace boilerplate code required to open, load, attach, and work with BPF objects commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit libbpf: Add libbpf-provided extern variables support commit, commit, commit, commit libbpf: Add bpf_link__disconnect() API to preserve underlying BPF resource commit libbpf: Support CO-RE relocations for LDX/ST/STX instructions commit bpftool: match several programs with same tag commit, commit, commit libbpf: Add support for flexible array accesses in a relocatable manner in BPF CO-RE commit, commit

perf libperf: Add man pages commit perf probe: adds support for user-space strings when type 'ustring' is specified commit perf report/top: Add 'k' hotkey to zoom directly into the kernel map commit perf report/top: Add menu entry for toggling callchain expansion commit perf sched timehist: Add support for filtering on CPU commit perf tools: Support --prefix / --prefix-strip commit Add runqslower tool to tools/bpf commit

tracing (FEATURED) Boot-time tracing support following boot config. It can setup new kprobe and synthetic events, more complicated event filters and trigger actions including histogram via supplemental kernel cmdline commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Add support for in-kernel dynamic event API commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit



7. Virtualization

Xen-netback: support dynamic unbind/bind commit

hv_utils: Add the support of hibernation commit, commit, commit, commit

8. Power management

suspend: Add sysfs attribute to control the "sync on suspend" behavior commit

ACPI: fan: Expose fan performance state information commit

cpuidle: Allow idle states to be disabled by default. In certain situations it may be useful to prevent some idle states from being used by default while allowing user space to enable them later on commit

thermal: Introduce the cpu idle cooling driver, a new method to cool down a CPU by injecting idle cycles at runtime. It has some similarities with the intel power clamp driver but it is actually designed to be more generic and relying on the idle injection powercap framework. Also rename the cpu_cooling device to cpufreq_cooling device commit, commit, commit

9. Cryptography

poly1305: add new 32 and 64-bit generic versions commit

shash: allow essiv and hmac to use OPTIONAL_KEY algorithms commit

10. Security

random: Add getentropy(..., GRND_INSECURE) , this causes getentropy to always return something, but without cryptographical guarantees. Also, remove the blocking pool and make /dev/random work just like getentropy(..., 0) and make GRND_RANDOM a no-op. Linux's blocking pool has outlived its usefulness, the Linux CRNG generates output that is good enough to use even for key generation. The blocking pool is not stronger in any material way, and keeping it around requires a lot of infrastructure of dubious value. Recommended LWN article: Removing the Linux /dev/random blocking pool. commit, commit, commit, commit, commit, commit, commit, commit

KEYS: Measure keys when they are created or updated. Currently they are not measured, therefore an attestation service, for instance, would not be able to attest whether or not the trusted keys keyring(s), for instance, contain only known good (trusted) keys. A new IMA policy function KEY_CHECK has been added to measure keys. keyrings option can be specified for KEY_CHECK to limit measuring the keys loaded onto the specified keyrings only. uid can be specified to further restrict key measurement for keys created by specific user commit, commit, commit, commit, commit, commit

SELinux Deprecate disabling SELinux and runtime commit Implement a SELinux hook for lockdown. If the lockdown module is also enabled, then a denial by the lockdown module will take precedence over SELinux, so SELinux can only further restrict lockdown decisions commit Allow per-file labelling for binderfs commit Caching a certain number (compile-time configurable) of recently used context strings to speed up repeated translations of the same context commit sidtab reverse lookup hash table, it reduces the time needed to add a new sidtab entry commit

Add a new sysfs file for querying TPM major version commit

11. Networking

(FEATURED) WireGuard secure network tunnel commit

Add support to do GRO/GSO by chaining packets of the same flow. This avoids the overhead to merge payloads into one big packet, and on the other end, if GSO is needed it avoids the overhead of splitting the big packet back to the native form commit, commit, commit, commit

Add offload indication to IPv4 and IPv6 routes so that mlxsw driver do not have to handle identical routes itself commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

unix sockets: Show number of scm files in /proc/self/fdinfo/. This may be useful to determine, that socket should be investigated or which task should be killed to put a reference counter on a resource commit, commit

TCP (FEATURED) Add initial support for Multi Path TCP protocol. This set adds MPTCP connection establishment, writing & reading MPTCP options on data packets, a sysctl to allow MPTCP per-namespace, and self tests. This is sufficient to establish and maintain a connection with a MPTCP peer, but will not yet allow or initiate establishment of additional MPTCP subflows. Future versions will include more features commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit; InitiaL MPTCP support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Using IPv6 flow-label to swiftly route around avoid congested or disconnected network path can greatly improve TCP reliability. New SNMP counters and a OPT_STATS counter have been added to track both host-level and connection-level statistics. Network administrators can use these counters to evaluate the impact of this new ability better commit Introduces a sysctl knob net.ipv4.tcp_no_ssthresh_metrics_save that disables TCP ssthresh metrics cache by default. Other parts of TCP metrics cache, e.g. rtt, cwnd, remain unchanged commit TCP: Add support for L3 domains to MD5 auth. With VRF, the scope of network addresses is limited to the L3 domain the device is associated. MD5 keys are based on addresses, so proper VRF support requires an L3 domain to be considered for the lookups commit, commit, commit, commit, commit, commit, commit, commit, commit

netfilter Set implementation for arbitrary concatenation of ranges commit, commit, commit, commit, commit, commit Add support for shifts to nft_bitwise in order to allow nftables to do bit shifts commit, commit, commit, commit, commit, commit, commit, commit, commit, commit nft_meta: add support for slave device matching commit, commit, commit, commit, commit, commit, commit, commit, commit nft_tunnel: dump ERSPAN_VERSION commit and OPTS_ERSPAN/VXLAN commit

Packet scheduler Add Flow Queue Proportional Integral controller Enhanced (FQ-PIE) active queue Management algorithm. It is an enhancement over the PIE algorithm. It integrates the PIE aqm with a deficit round robin scheme commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Add a new Qdisc, ETS, which is based on 802.1Q-2014 wording. The new Qdisc operates like the PRIO / DRR combo would when configured as per the standard. The strict classes, if any, are tried for traffic first. When there's no traffic in any of the strict queues, the ETS ones (if any) are treated in the same way as in DRR commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Bluetooth Bluetooth 5.2 initial support commit, commit, commit, commit, commit, commit, commit Add support for LE PHY Update Complete event commit Implementation of MGMT_OP_SET_BLOCKED_KEYS , added to receive the list of blocked keys from user-space commit Increment management interface revision commit

RDMA Add an ioctl command to allocate an async event file followed by a new ioctl command to get a device context commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Add kernel capability flags to differentiate between current FW in kernel that supports both ldpm and edpm commit

ipsec: add TCP encapsulation support of IKE and ESP messages (RFC 8229) commit, commit, commit, commit, commit, commit

bridge Add STP xstats commit Add per-vlan state option commit, commit, commit, commit Add vlan notifications and rtm support (requirement for per-vlan options) commit, commit, commit, commit, commit, commit, commit, commit

ethtool: netlink based interface for ethtool. It aims to address some long known issues with the ioctl interface, mainly lack of extensibility, raciness, limited error reporting and absence of notifications. The goal is to allow userspace ethtool utility to provide all features it currently does but without using the ioctl interface. The interface uses generic netlink family "ethtool" and provides multicast group "monitor" which is used for notifications. Documentation for the interface is in Documentation/networking/ethtool-netlink.rst commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Adds support for PTP (IEEE 1588) P2P one-step time stamping along with a driver for a hardware device that supports this commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

ncsi: Support for multi host mellanox card commit

openvswitch: New MPLS actions for layer 2 tunnelling commit, commit, commit

pptp: support sockets bound to an interface commit

QRTR flow control improvements commit, commit, commit, commit, commit

smc: allow unprivileged users to read pnet table commit

tipc: introduce variable window congestion control commit, commit, commit

xdp: Introduce bulking for non-map XDP_REDIRECT commit, commit, commit

vsock: add local transport support (vsock_loopback) to handle local communication. This could be useful to test vsock core itself and to allow developers to test their applications without launching a VM commit, commit, commit, commit, commit, commit

12. Architectures

ARM Device Tree Sources: New SoCs Atmel/Microchip SAM9X60 (ARM926 SoC) commit OMAP 37xx gets split into AM3703/AM3715/DM3725, who are all variants of it with different GPU/media IP configurations commit ST stm32mp15 SoCs (1-2 Cortex-A7, CAN, GPU depending on SKU) commit ST Ericsson ab8505 (variant of ab8500) and db8520 (variant of db8500) commit, commit Unisoc SC9863A SoC (8x Cortex-A55 mobile chipset w/ GPU, modem) commit Qualcomm SC7180 (8-core 64bit SoC, unnamed CPU class) commit Device Tree Sources: New boards Allwinner Emlid Neutis SoM (H3 variant) commit Allwinner Libre Computer ALL-H3-IT and ALL-H5-CC commit, commit Allwinner PineH64 Model B commit Amlogic Libretech Amlogic GX PC (s905d and s912-based variants) commit Atmel/Microchip Kizboxmini, sam9x60 EK, sama5d27 Wireless SOM (wlsom1) commit Marvell Armada 385-based SolidRun Clearfog GTR commit NXP Gateworks GW59xx boards based on i.MX6/6Q/6QDL commit, commit, commit, commit NXP Tolino Shine 3 eBook reader (i.MX6sl) commit NXP Embedded Artists COM (i.MX7ULP) commit NXP SolidRun Clearfog CX/ITX and HoneyComb (LX2160A-based systems) commit NXP Google Coral Edge TPU (i.MX8MQ) commit Rockchip Radxa Dalang Carrier (supports rk3288 and rk3399 SOMs) commit Rockchip Radxa Rock Pi N10 (RK3399Pro-based) commit Rockchip VMARC RK3399Pro SOM commit ST Reference boards for stm32mp15 commit ST Ericsson Samsung Galaxy S III mini (GT-I8190) commit, commit, commit, commit, commit ST Ericsson HREF520 reference board for DB8520 commit TI OMAP Gen1 Amazon Echo (OMAP3630-based) commit Qualcomm Inforce 6640 Single Board Computer (msm8996-based) commit Qualcomm SC7180 IDP (SC7180-based) commit New Evaluation Kit the SAMA5D27-WLSOM1-EK. It's based on the Microchip WireLess SoM which contains the SAMA5D27 LPDDR2 2Gbits SiP commit Add support for the Videostrong KII Pro tv box which is based on the gxbb-p201 reference design commit Add EK874 board with idk-2121wr display support commit Add Thor96 board from Einfochips. This board is one of the 96Boards Consumer Edition platform powered by the NXP i.MX8MQ SoC commit ARM 64 locking: Use optimized spinning loop commit Add support for Armv8.5 E0PD, which benefits KASLR in the same way as KPTI but without the overhead. This allows KPTI to be disabled on CPUs that are not affected by Meltdown, even is KASLR is enabled commit, commit, commit, commit Initial support for the Armv8.5 RNG instructions, which claim to provide access to a high bandwidth, cryptographically secure hardware random number generator. As well as exposing these to userspace, we also use them as part of the KASLR seed and to seed the crng once all CPUs have come online commit, commit Advertise a bunch of new instructions to userspace, including support for Data Gathering Hint, Matrix Multiply and 16-bit floating point commit Support for loading crash dump kernels with kexec_file_load() commit Implement optimised checksum routine commit



12.1. X86

Add AMD-TEE driver. The AMD-TEE driver handles the communication with AMD's TEE environment. The TEE environment is provided by AMD Secure Processor. The AMD Secure Processor (formerly called Platform Security Processor or PSP) is a dedicated processor that features ARM TrustZone technology, along with a software-based Trusted Execution Environment (TEE) designed to enable third-party Trusted Applications. This feature is currently enabled only for APUs commit, commit

Intel Uncore frequency control. It allows control of uncore frequency limits on supported server platforms. Uncore frequency controls RING/LLC (last-level cache) clocks commit

platforms Enable thermal policy for ASUS TUF FX705DY/FX505DY commit asus-nb-wmi: Support left round button on N56VB commit asus_wmi: Support throttle thermal policy commit intel-hid: Add Tiger Lake ACPI device ID commit intel_pmc_core: Add Intel Elkhart Lake support commit intel_pmc_core: Add Intel Tiger Lake support commit mlx-platform: add new features for the existing Mellanox systems and introduce two new system classes commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit touchscreen_dmi: Add support for the PiPO W11 tablet commit

Add MCA and EDAC support for AMD Family 19h commit, commit, commit, commit, commit

Remove MPX support commit, commit, commit

mtrr: Require CAP_SYS_ADMIN for all access commit

resctrl: Add task resctrl information display commit

Add support for "Fast Short Rep Mov" commit

intel_th: pci: Add Elkhart Lake CPU support commit

mei: me: add comet point (lake) H device ids commit

powercap: intel_rapl: add support for JasperLake commit and TigerLake Mobile commit

perf amd: Add support for Large Increment per Cycle Events commit, commit amd: Enable the fixed Instructions Retired counter IRPERF commit cstate: Add Tremont support commit rapl: Add Comet Lake support commit intel: Add Elkhart Lake support commit msr: Add Tremont support commit

tools/power turbostat Support Cometlake commit Support Elkhart Lake commit Support Ice Lake server commit Support Jasper Lake commit Support Tiger Lake commit

intel-speed-select: Add support for core-power discovery commit

crypto: faster 64 bit poly1305 implementation commit, commit

intel_idle Allow the intel_idle driver to use C-states information from ACPI _CST on systems where the processor is not recognized by it commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Introduce states_off module parameter commit Introduce use_acpi module parameter commit

KVM: Support AMD SVM AVIC w/ in-kernel irqchip mode commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

12.2. S390

S390 hardware compression support for kernel zlib commit, commit, commit, commit, commit, commit

Enhanced handling of secure keys and protected keys commit, commit, commit, commit, commit

pkey: Add support for key blob with clear key value commit

Support KPROBES_ON_FTRACE commit

Add new reset vcpu API commit, commit, commit, commit

12.3. RISCV

BPF JIT, optimizations and far jumps support commit, commit, commit, commit, commit, commit, commit, commit, commit

Add KASAN support commit

Add support for CONFIG_DEBUG_VIRTUAL commit

Add kconfig option for QEMU virt machine commit

12.4. MIPS

Ingenic: Add Ingenic X1000 support commit

Ingenic: Add YSH & ATIL CU Neo board support commit

Add MAC2008 Support commit

vdso: Support mremap() for vDSO the same way it's done for x86 and arm commit

12.5. POWERPC

vdso32 enhancement and optimisation commit, commit, commit, commit, commit, commit, commit

Enable CONFIG_VMAP_STACK on PPC32 commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Add support of KASAN_VMALLOC on PPC32 commit

Add a debugfs entry to dump PHB's IODA PE state commit

Page directory freeing TLB flushing fixes commit commit commit commit commit commit commit commit commit

KVM: Book3S HV: Implement H_SVM_INIT_ABORT hcall commit

12.6. CSKY

Initial stack protector support commit

Tightly-Coupled Memory or Sram support commit

Add PCI support commit

12.7. MICROBLAZE

Add ID for Microblaze v11 commit

Wire CMA allocator commit

12.8. SPARC

Add support for folded p4d page tables commit

12.9. UML

Add an option to make serial driver non-raw commit

12.10. ARC

Preserve userspace fpu state commit

13. Drivers

13.1. Graphics

Add support for specifying a connector's panel_orientation on the kernel cmdline ( rotate only supports 0/180 degrees) with panel_orientation , with one of "normal", "upside_down", "left_side_up", or "right_side_up" commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Show which of the i2c adapters is for which drm connector by providing a symbolic link in connector's sysfs directory, e.g.: /sys/class/drm/card0-HDMI-A-1/ddc -> ../../../../soc/13880000.i2c/i2c-2 ; this shows that card0-HDMI-A-1 uses i2c-2 and can e.g. run ddcutil commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

amdgpu Remove experimental flag for Navi14 commit Enable sync object timelines for vulkan commit Enable MST DSC support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Add DMCUB display microengine support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit DC OEM i2c support commit Initial HDCP 2.x support commit Enables BACO (Bus Active Chip Off) for power savings on Arcturus commit, commit Use BACO for runtime PM power save commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit gfxoff on navi10 and raven1 refresh commit, commit DCN support on POWER commit and enable KFD on POWER systems commit powerplay: support custom power profile setting commit Enable GPU reset by default on Navi commit and renoir commit Enable RAS feature for the gc of Arcturus commit, commit, commit, commit

Intel Enable DSC commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit HDCP 2.2 for CFL commit LMEM debugfs support commit LMEM discontiguous object maps commit Use LMEM for dumb buffers if possible commit Add LMEM mmap support commit Add second TGL PCH ID commit Add 10bpc formats with alpha for icl+ commit Add new EHL/JSL PCI ids commit Expose more formats commit, commit, commit, commit, commit, commit, commit Introduce DRM_I915_GEM_MMAP_OFFSET commit

panel Logic PD type 28 panel support commit ingenic: Add support for the JZ4770 commit Add driver for Sony ACX424AKP panel commit Add panel driver for Leadtek LTK500HD1829 commit xinpeng XPP055C272 commit Add support for AUO B116XAK01 panel commit Add support for BOE NV140FHM-N49 panel to panel-simple commit simple: Add Satoz SAT050AT40H12R2 panel support commit simple: Add compatible for GiantPlus GPM940B0 commit Sharp LS020B1DD01D panels commit Add Boe Himax8279d MIPI-DSI LCD panel commit Add backlight support commit

nouveau TU10x graphics engine support (TU11x pending) commit, commit, commit, commit

rockchip dsi/px30 support commit, commit

virtio-gpu fb damage support commit

msm Add support for SC7180 display commit, commit, commit, commit Add DSI support for sc7180 commit Add UBWC support for display on SC7180 commit Add scaler support on SC7180 display commit a618 support commit, commit Add UBWC support for RGB8888 formats commit Support firmware-name for zap fw commit

vmwgfx Add ioctl for messaging from/to guest userspace to/from host commit

mediatek Support CMDQ interface in ddp component commit Add ctm property support commit Add gamma property according to hardware capability commit

sun4i Add support for suspending the display driver commit A64 mipi dsi support commit

rcar-du Color management module support commit, commit, commit, commit, commit, commit LVDS encoder dual-link support commit R8A77980 support commit

ast Atomic modeset support commit, commit, commit

mcde vblank support commit

meson OSD1 plane AFBC commit commit, commit, commit, commit, commit, commit, commit, commit, commit

gma500 Add pageflip support commit

komeda Enable new product D32 support commit Add debugfs node to control error verbosity commit Adds gamma and color-transform support for DOU-IPS commit

tilcdc Remove obsolete bundled tilcdc tfp410 driver commit

ARC PGU: add ARGB8888 format to supported format list commit

edid Add CTA-861-G modes with VIC >= 193 commit Add aspect ratios to HDMI 4K modes commit, commit

LVDS decoder support commit

bridge Add Analogix anx6345 support commit

hisilicon/hibmc Export VRAM MM information to debugfs commit

mgag200 Add module parameter to pin all buffers at offset 0 commit

scheduler: improve job distribution with multiple queues commit

13.2. Power Management

EFI: Allow disabling PCI busmastering on bridges during boot commit

ACPI: DPTF: Add Tiger Lake ACPI device IDs commit

ACPI: fan: Add Tiger Lake ACPI device ID commit

thermal Add BCM2711 thermal driver commit int340x: processor_thermal: Add Jasper Lake support commit int340x_thermal: Add Tiger Lake ACPI device IDs commit intel: intel_pch_thermal: Add Comet Lake (CML) platform support commit qoriq: Add hwmon support commit rockchip: Enable hwmon commit sun8i: Add hwmon support commit sun8i: Add thermal driver for H6/H5/H3/A64/A83T/R40 commit



13.3. Storage

SCSI ufs: add MediaTek vendor implementations commit, commit, commit, commit, commit, commit mpt3sas: Enhancements of phase14 commit, commit, commit, commit, commit, commit, commit, commit, commit, commit esp_scsi: Add support for FSC chip commit

pata_pcmia: add SanDisk High (>8G) CF card to supported list commit

13.4. Drivers in the Staging area

media: meson: vdec: add g12a platform commit

media: meson: vdec: add sm1 platform commit

media: hantro: Support color conversion via post-processing commit

media: Rockchip ISP Driver commit, commit, commit, commit, commit, commit, commit, commit, commit

rtl8188eu: Add device id for MERCUSYS MW150US v2 commit

android: Delete the 'vsoc' driver commit

octeon-usb: delete the octeon usb host controller driver commit

Remove isdn capi drivers commit

octeon: delete driver commit

13.5. Networking

Bluetooth hci_bcm: Additional changes for BCM4354 support commit, commit, commit, commit btusb: Add support for 04ca:3021 QCA_ROME device commit hci_bcm: Drive RTS only for BCM43438 commit hci_h4: Add support for ISO packets commit hci_h5: Add support for ISO packets commit hci_vhci: Add support for ISO packets commit hci_qca: Enable power off/on support during hci down/up for QCA Rome commit

Infiniband hfi1: Add RcvShortLengthErrCnt to hfi1stats commit hfi1: Add software counter for ctxt0 seq drop commit

RDMA hns: Get pf capabilities from firmware commit, commit, commit hns: Add support for extended atomic in userspace commit hns: Add support for reporting wc as software mode commit

ar5523: Add USB ID of SMCWUSBT-G2 wireless adapter commit

ath10k Enable the random mac address for netdetect commit Enable firmware log by default for sdio commit Enable napi on RX path for sdio commit Enable wow feature for sdio chip commit

ath11k Driver for Qualcomm IEEE 802.11ax devices commit, commit, commit, commit, commit, commit, commit

bcmgenet Add software counters to track reallocations commit Turn on offloads by default commit Enable NETIF_F_HW_CSUM feature commit

bnxt_en Add support for devlink info command commit Devlink notification after recovery complete commit, commit, commit Add support to update progress of flash update commit Improve link up detection commit Support UDP RSS hashing on 575XX chips commit

brcmfmac Add initial support for monitor mode commit Add support for BCM4359 SDIO chipset commit

cxgb4: add support for high priority filters commit

dpaa2-ptp: add external trigger event support commit

dsa Add support for Atheros AR9331 built-in switch commit Add support for Atheros AR9331 TAG format commit b53: Enable Broadcom tags for 531x5/539x families commit, commit felix: Add PCS operations for PHYLINK commit mv88e6xxx: Add SERDES stats counters to all 6390 family members commit

ena Implement XDP commit, commit, commit

enetc Add software timestamping commit Add support time specific departure base on the qos etf commit

hns3 Add some VF VLAN information for command "ip link show" commit Implement ndo_features_check ops for hns3 driver commit

hv_netvsc: Add XDP support commit, commit

ice Add device ids for E822 devices commit Enable the driver to write the filtering hardware tables to allow for changing of RSS rules commit, commit, commit, commit, commit, commit, commit, commit Enable ip link show on the PF to display VF unicast MAC(s) commit Support UDP segmentation offload commit

igc Add PHY power management control commit Add SKU for i225 device commit Add basic support for Timestamping/PTP commit, commit, commit, commit, commit Add support for TSO commit Add legacy power management support commit

ionic Add Rx dropped packet counter commit Add sriov support commit, commit mvm: add support for location range request version 8 commit mvm: add support for responder config command version 7 commit

macsec: initial support for hardware offloading commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Adds support for Copper SFP+ modules with Clause 45 PHYs commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

mlx5 VIRTIO_NET Emulation Offload commit, commit, commit, commit, commit Add RoCE accelerator counters commit, commit Software steering support for multi destination steering rules commit, commit, commit, commit, commit, commit, commit, commit, commit Increase the number of chains and prios commit, commit Increase the max number of channels to 128 commit

mlx5e: allow TSO on VXLAN over VLAN topologies commit

mlxsw Add tunnel devlink-trap support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Offload TBF commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Allow setting default port priority commit, commit, commit Add a new Qdisc, ETS commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

mv88e6xxx: Add serdes Rx statistics commit

netdevsim: fib: Add dummy implementation for FIB offload commit

nfp Add support for TLV device stats commit Add ipv6 tunnel support to NFP commit, commit, commit, commit, commit, commit, commit, commit, commit

octeontx2-pf: Add network driver for physical function commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

phy DP83822: Add support for additional DP83825 devices commit dp83826: Add phy IDs for DP83826N and 826NC commit phylink: add support for polling MAC PCS commit

qed: FW 8.42.2.0 Add fw overlay feature commit

qmi_wwan Add support for ASKEY WWHC050 commit Re-add DW5821e pre-production variant commit

qtnfmac Add module param to configure DFS offload commit Add support for STA HE rates commit Add support for TWT responder and spatial reuse commit

r8152: Add MAC passthrough support to new device commit

r8169: use generic ndo_do_ioctl handler phy_do_ioctl commit

rtw88: Add wowlan support for 8822c commit, commit, commit, commit, commit, commit, commit

stmmac TSN support using TAPRIO API commit, commit, commit, commit, commit, commit, commit ETF support commit, commit, commit, commit, commit, commit, commit, commit Print more information in DebugFS DMA Capabilities file commit

wil6210 add support for set_cqm_rssi_config commit Support set_multicast_to_unicast cfg80211 operation commit

wlcore: mesh: Add support for RX Broadcast Key commit

13.6. Audio

soundwire: qcom: add support for SoundWire controller commit

Fix year 2038 issue for sound subsystem commit, commit, commit, commit, commit, commit, commit, commit, commit

cmipci: Allow disabling MPU port via module option commit

control: Add verification for kctl accesses commit

dice: add support for Alesis MasterControl commit

The already deprecated dimension support in ALSA control API is dropped completely now commit, commit, commit, commit

hda Add docking station support for Lenovo Thinkpad T420s commit realtek: Add Headset Button supported for ThinkPad X1 commit realtek: Add Headset Mic supported commit realtek: Add Headset Mic supported for HP cPC commit Add JasperLake PCI ID and codec vid commit

ASoC Adapt the recent PCM API updates to ASoC drivers commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit SOF: Intel: add codec_mask module parameter commit Add MediaTek MT6660 Speaker Amp Driver commit Intel: Add machine driver for da7219_max98373 commit Intel: common: add match tables for CNL/CFL/CML w/ SoundWire commit Intel: common: add match tables for ICL w/ SoundWire commit Intel: common: add match tables for TGL w/ SoundWire commit SOF: Add asynchronous sample rate converter topology support commit SOF: Intel: add PCI ID for JasperLake commit SOF: Intel: add module namespace support commit, commit, commit, commit, commit, commit, commit, commit SOF: Intel: hda: Add iDisp4 DAI commit soc-acpi: add support for SoundWire-based machines commit, commit, commit, commit, commit, commit amd MMAP_INTERLEAVED Support commit amd: add ACP3x TDM mode support commit codecs: Add jz4770-codec driver commit codecs: add wsa881x amplifier support commit fsl_asrc: Add support for imx8qm & imx8qxp commit gtm601: add Broadmobi bm818 sound profile commit intel/skl/hda - export number of digital microphones via control components commit intel: Add Broadwell rt5650 machine driver commit intel: sof_rt5682: Add support for tgl-max98357a-rt5682 commit qcom: sdm845: add support to DB845c and Lenovo Yoga commit rt1015: add rt1015 amplifier driver commit rt1308-sdw: add rt1308 SdW amplifier driver commit rt700: add rt700 codec driver commit rt711: add rt711 codec driver commit rt715: add RT715 codec driver commit sgtl5000: add multi endpoint support commit tlv320aic31xx: Add HP output driver pop reduction controls commit tlv320aic31xx: Add Volume Soft Stepping control commit Add support to WCD9340/WCD9341 codec commit, commit, commit, commit, commit, commit, commit, commit



13.7. Tablets, touch screens, keyboards, mouses

tm2-touchkey - add support for Coreriver TC360 variant commit

Add IOC3 serio driver commit

ili210x - add ili2120 support commit

HID hidraw: add support uniq ioctl commit Logitech HID++ Bluetooth LE support commit, commit logitech-hidpp: read battery voltage from newer devices commit logitech: Add MX Master 3 Mouse commit apple: Add support for recent firmware on Magic Keyboards commit google: add moonball USB id commit



13.8. TV tuners, webcams, video capturers

atmel: atmel-isc-base: add support for Y10 format commit

atmel: atmel-isi: add support for mono sensors, GRAY and Y16 commit

coda: jpeg: add CODA960 JPEG encoder support commit

cx23885: Add support for AVerMedia CE310B commit

dvb: add support for TerraTec TC2 Stick (193534) commit

rc: ir-hix5hd2: add hi3796cv300-ir support commit

rtl28xxu: Add support for PROlectrix DV107669 DVB-T dongle commit

sun4i-csi: Add support for A10 CSI1 camera sensor interface commit

ti-vpe: cal: Add AM654 support commit

ti-vpe: cal: Add DRA76x support commit

ti-vpe: cal: Enable DMABUF export commit

vivid: Add touch support commit

vivid: support multiplanar touch devices commit

13.9. Universal Serial Bus

EHCI: ehci-mv: add HSIC support commit

cdns3: Add streams support to cadence USB3 DRD driver commit

cdns3: add NXP imx8qm glue layer commit

dwc3: pci: add ID for the Intel Comet Lake -V variant commit

gadget: composite: Support more than 500mA MaxPower commit

gadget: configfs: Add max_speed setting commit, commit

xhci-tegra: Implement basic ELPG support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

misc: iowarrior: add support for 2 OEMed devices commit

misc: iowarrior: add support for the 100 device commit

misc: iowarrior: add support for the 28 and 28L devices commit

musb: Add support for MediaTek musb controller commit

phy: show USB charger type for user commit

serial: option: add ME910G1 ECM composition 0x110b commit

serial: pl2303: add device-id for HP LD381 commit

typec: ucsi: add support for separate DP altmode devices commit

13.10. Serial Peripheral Interface (SPI)

Add HiSilicon v3xx SPI NOR flash controller driver commit

pxa2xx: Add support for Intel Comet Lake PCH-V commit

rspi: Add support for GPIO chip selects commit

rspi: Add support for multiple native chip selects commit

spi-ti-qspi: support large flash devices commit

13.11. Watchdog

it87_wdt: add IT8786 ID commit

mtk_wdt: mt8183: Add reset controller commit

mtk_wdt: mt2712: Add reset controller commit

13.12. Serial

8250: Support disabling mdelay-filled probes of 16550A variants commit

8250_exar: add support for ACCES cards commit

baudrate: SPARC supports few more baud rates commit

serial: meson_uart: Add support for kernel debugger commit

13.13. Device Voltage and Frequency Scaling

devfreq: improve devfreq statistics counting add ability to reset statistics using sysfs commit

devfreq: Add new name sysfs attribute in order to get device name commit

devfreq: Add dynamic scaling for imx8m ddr controller commit

devfreq: Add debugfs support with devfreq_summary file commit

13.14. Voltage, current regulators, power capping, power supply

power avs: Add support for CPR (Core Power Reduction) found in Qualcomm products commit supply: core: Add battery internal resistance temperature table support commit supply: bq25890_charger: Add support of BQ25892 and BQ25896 chips commit supply: axp20x_usb_power: Allow offlining commit supply: max17042: add MAX17055 support commit

regulator add IPQ4019 SDHCI VQMMC LDO driver commit bd71828: Basic support for ROHM bd71828 PMIC regulators commit mp8859: add config option and build entry commit mp8859: add driver commit mpq7920: add mpq7920 regulator driver commit



13.15. Real Time Clock (RTC)

at91rm9200: add sama5d4 and sama5d2 compatibles commit

bd70528: add BD71828 support commit

rv3029: add RTC_VL_READ/RTC_VL_CLEAR support commit

rv3029: add nvram support commit

13.16. Pin Controllers (pinctrl)

Ingenic: Add missing parts for X1000 and X1500 commit

Ingenic: Add pinctrl driver for X1830 commit

aspeed-g6: Add AST2600 pinconf support commit

aspeed-g6: Add support for the AST2600 USB pinmux commit

freescale: Add i.MX8MP pinctrl driver support commit

sunrisepoint: Add Coffee Lake-S ACPI ID commit

13.17. Multi Media Card (MMC)

sdhci-brcmstb: Add ability to use HS400ES transfer mode commit

sdhci-brcmstb: Add support for Command Queuing (CQE) commit

sdhci-msm: Add CQHCI support for sdhci-msm commit

sdhci: add support for using external DMA devices commit

13.18. Memory Technology Devices (MTD)

spi-nor: Add support for at25sl321 commit

spi-nor: Add support for mx25r3235f commit

spi-nor: Add support for sst26vf016b commit

spi-nor: Add support for w25q32jwm commit

spi-nor: add Gigadevice gd25lq128d support commit

spi-nor: intel-spi: Add support for Intel Comet Lake-V SPI serial flash commit

spi-nor: intel-spi: Add support for Intel Jasper Lake SPI serial flash commit

spinand: add support for Toshiba TC58CVG2S0HRAIJ commit

13.19. Industrial I/O (iio)

max31856: provide more configuration options, also extending IIO core commit, commit, commit, commit, commit, commit, commit, commit, commit

accel: Add driver for the BMA400 commit

accel: bma180: BMA254 support commit

accel: bma180: Basic regulator support commit

adc: Add support for AD7091R5 ADC commit

adc: ad7923: Add support for the ad7908/ad7918/ad7928 commit

adc: new driver to support Linear technology's ltc2496 commit

imu: adis16480: Add support for ADIS16490 commit

imu: inv_mpu6050: add fifo temperature data support commit

imu: inv_mpu6050: add support of MPU9150 magnetometer commit

ping: add parallax ping sensors commit

pressure: Add driver for DLH pressure sensors commit

13.20. Multi Function Devices (MFD)

ab8500-core: Add device tree support for AB8505 commit

bd71828: Add power-key support commit

bd71828: Support ROHM BD71828 PMIC - core commit

da9062: add support for the DA9062 GPIOs in the core commit

intel-lpss: Add Intel Jasper Lake PCI IDs commit

ioc3: Add driver for SGI IOC3 chip commit

wcd934x: Add support to wcd9340/wcd9341 codec commit

13.21. Pulse-Width Modulation (PWM)

sun4i: Add support for H6 PWM commit

13.22. Inter-Integrated Circuit (I2C + I3C)

i3c master: cdns: add data hold delay support commit

I2C JZ4780: Add support for the X1000 commit parport-light: remove driver commit i801: Add support for Intel Comet Lake PCH-V commit designware: Add ACPI HID for Hisilicon Hip08-Lite I2C controller commit



13.23. Hardware monitoring (hwmon)

Add support for enable attributes to hwmon core commit

Add intrusion templates commit

Driver for MAX31730 commit

Driver for disk and solid state drives with temperature sensors commit

adm1177: Add ADM1177 Hot Swap Controller and Digital Power Monitor driver commit

k10temp: Add debugfs support commit

k10temp: Display up to eight sets of CCD temperatures commit

k10temp: Report temperatures per CPU die commit

k10temp: Show core and SoC current and voltages on Ryzen CPUs commit

pmbus/ibm-cffps: Add new manufacturer debugfs entries commit

pmbus/ibm-cffps: Add the VMON property for version 2 commit

pmbus/ucd9000: Add support for UCD90320 Power Sequencer commit

pmbus: Add MAX20796 to devices supported by generic pmbus driver commit

pmbus: Add support for vid mode calculation per page bases commit, commit, commit, commit, commit

pmbus: Driver for MAX20730, MAX20734, and MAX20743 commit

w83627ehf: remove nct6775 and nct6776 support commit

13.24. General Purpose I/O (gpio)

Add support for the Xylon LogiCVC GPIOs commit

bd71828: Initial support for ROHM BD71828 PMIC GPIOs commit

sifive: Add GPIO driver for SiFive SoCs commit

wcd934x: Add support to wcd934x gpio controller commit

13.25. Leds

lm3692x: Allow to configure over voltage protection commit

tps6105x: add driver for MFD chip LED mode commit

13.26. DMA engines

Create symlinks between DMA channels and slaves, because currently it is not easy to find out which DMA channels are in use, and which slave devices are using which channels commit

JZ4780: Add support for the X1830 commit

fsl-edma: Add eDMA support for QorIQ LS1028A platform commit

hisilicon: Add Kunpeng DMA engine support commit

idxd driver for Intel Data Streaming Accelerator commit, commit, commit, commit, commit, commit, commit, commit, commit

PLX Switch DMA Engine Driver commit, commit, commit, commit, commit

sun4i: Add support for cyclic requests with dedicated DMA commit

Add Texas Instruments UDMA support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

13.27. Hardware Random Number Generator (hwrng)

iproc-rng200 - Add support for BCM2711 commit

13.28. Cryptography hardware acceleration

caam: Add support for i.MX8M Mini commit

caam: add support for i.MX8M Nano commit

caam: add support for i.MX8M Plus commit

ccp: add TEE support for Raven Ridge commit

chtls: Add support for AES256-GCM based ciphers commit

hisilicon: Add aead support on SEC2 commit

sun4i-ss: add the A33 variant of SS commit

13.29. PCI

P2PDMA: Add Intel SkyLake-E to the whitelist commit

brcmstb: Add Broadcom STB PCIe host controller driver commit

brcmstb: Add MSI support commit

dwc: intel: PCIe RC controller driver commit

qcom: Add support for SDM845 PCIe controller commit

switchtec: Add Gen4 device IDs commit

switchtec: Add Gen4 flash information interface support commit

vmd: Add two VMD Device IDs commit

13.30. Thunderbolt

(FEATURED) thunderbolt: Add support for USB 4. USB4 is the public specification of Thunderbolt 3 protocol commit, commit, commit, commit, commit, commit, commit, commit, commit

13.31. Clock

Add support for setting clk_rate via debugfs commit

fsl-sai: new driver commit

imx: Add support for i.MX8MP clock driver commit

ls1028a: Add clock driver for Display output interface commit

meson: add a driver for the Meson8/8b/8m2 DDR clock controller commit

qcom: Add MSM8998 Multimedia Clock Controller (MMCC) driver commit

qcom: Add display clock controller driver for SC7180 commit

qcom: Add graphics clock controller driver for SC7180 commit

qcom: Add ipq6018 Global Clock Controller support commit

qcom: Add video clock controller driver for SC7180 commit

timer-microchip-pit64b: Add Microchip PIT64B support commit

zynqmp: Add support for get max divider commit

13.32. PHY ("physical layer" framework)

core: Add consumer device link support commit

cadence: Sierra: Add support for SERDES_16G used in J721E SoC commit

intel-lgm-emmc: Add support for eMMC PHY commit

ti: j721e-wiz: Add support for WIZ module present in TI J721E SoC commit

usb: Add support for new Synopsys USB controller on the 7211b0 commit

usb: Add support for new Synopsys USB controller on the 7216 commit

usb: Add support for wake and USB low power mode for 7211 S2/S5 commit

13.33. Various

PCI/switchtec: Add Gen4 system info register support commit

PCI/switchtec: Add support for Intercomm Notify and Upstream Error Containment commit

firmware: qcom_scm: Dynamically support SMCCC and legacy conventions commit

interconnect: Add interconnect_graph file to debugfs commit

interconnect: qcom: Add MSM8916 interconnect provider driver commit

iommu/arm-smmu-v3: Add support for Substream IDs commit

iommu/vt-d: Add Kconfig option to enable/disable scalable mode commit

iommu/vt-d: debugfs: Add support to show page table internals commit

irqchip/gic-v4.1: Implement the v4.1 flavour of VMAPP commit

irqchip/meson-gpio: Add support for meson a1 SoCs commit

irqchip: Add Aspeed SCU interrupt controller commit

irqchip: Add NXP INTMUX interrupt multiplexer support commit

isdn: capi: dead code removal commit

memory: tegra: Add support for the Tegra194 memory controller commit

memory: tegra: Implement EMC debugfs interface on Tegra20 commit and Tegra30 commit

misc: alcor_pci: Add AU6625 to list of supported PCI_IDs commit

nvmem: add QTI SDAM driver commit

nvmem: add support for the write-protect pin commit

remoteproc/mediatek: add SCP support for mt8183 commit

remoteproc: mss: q6v5-mss: Add modem support on SC7180 commit

remoteproc: qcom: pas: Add MSM8998 ADSP and SLPI support commit

remoteproc: qcom: pas: Add SM8150 ADSP, CDSP, Modem and SLPI support commit

reset: Add Broadcom STB RESCAL reset controller commit

reset: intel: Add system reset controller driver commit

rpmsg: add rpmsg support for mt8183 SCP commit

soc/tegra: fuse: Add Tegra194 support commit

soc: ti: k3: add navss ringacc driver commit

14. List of Pull Requests

15. Other news sites