Linux 4.19 was released on Monday, 22 October.

Summary: This release adds: the CAKE network queue management to fight bufferbloat, it is designed to fight intended to squeeze the most bandwidth and latency out of even the slowest ISP links and routers; support for guaranteeing minimum I/O latency targets for cgroups; experimental support for the future Wi-Fi 6 (802.11ax-drafts); memory usage for overlayfs users has been improved; a experimental EROFS file system optimized for read-only use; a new asynchronous I/O polling interface; support for avoiding unintentional writes to an attacker-controlled FIFO or regular files in world writable sticky directories; support for a Intel feature that locks part of the CPU cache for an application; and many new drivers and other improvements.

(bonus: the Linux 4.18 and Linux 4.17 changelogs, unavailable during their respective releases, are now complete)

1. Coolest features

1.1. Better networking experience with the CAKE queue management algorithm

This release includes a new queuing discipline for the network packet scheduler: Common Applications Kept Enhanced (CAKE). It is designed to replace and improve upon the complex hierarchy of simple queuing disciplines presently required to effectively tackle the bufferbloat problem at the network edge.

CAKE targets the home router use case and is intended to squeeze the most bandwidth and latency out of even the slowest ISP links and routers, while presenting an API simple enough that even an ISP can configure it.

Recommended LWN article: Let them run CAKE

Project page: https://www.bufferbloat.net/projects/codel/wiki/Cake/

Technical information: https://www.bufferbloat.net/projects/codel/wiki/CakeTechnical/

Paper: https://arxiv.org/abs/1804.07617

Code: commit 1, 2, 3, 4, 5, 6, 7, 8

1.2. Block I/O latency controller

This release adds a new controller that attempts to guarantee minimum I/O latency targets for cgroups. As long as everybody is meeting their latency target the controller doesn't do anything, but once a group starts missing its target it will attempt to maintain average IO latencies below the configured latency target, throttling anybody with a higher latency target than the victimized group. Latency targets need to be enabled in the new io.latency cgroup file, but experimentation is needed to determine the latency targets for a given hardware configuration. For more details see the documentation.

Recommended LWN article: The block I/O latency controller

Code: commit 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13

1.3. Preliminary Wi-Fi 6 (802.11ax) support

This release adds preliminary support in the wireless stack for the existing drafts of the future 802.11ax standard, also known as Wi-Fi 6.

Code: commit 1, 2, 3, 4

1.4. New asynchronous I/O polling interface

After being merged and reverted in 4.18, this feature adds a simple one-shot poll through the io_submit(2) interface to poll for the readiness of file descriptors using the aio subsystem. It allows aio poll to work without any additional context switches, unlike epoll. To poll for a file descriptor the application should submit an iocb of type IOCB_CMD_POLL . It adds a io_pgetevents(2) system call, which is the io_getevents(2) equivalent of ppoll(2) / pselect(2) and allows to properly mix signals and aio completions (especially with IOCB_CMD_POLL ). The API is based on patches that existed in RHAS2.1 and RHEL3, which means it already is supported by libaio.

Recommended LWN article: A new kernel polling interface

Code: commit 1, 2, 3, 4

1.5. Overlayfs memory usage improvements

When users of overlayfs (eg. containers) change metadata on a file, overlayfs makes a copy of the entire file's cache for the upper layer. This means that some actions, eg. doing chown() on whole image directory tree, will increase memory usage considerably. This release allows to delay copy up of data: when file is on lower layer and only metadata is modified (except size), the kernel will only only copy up the metadata and continue to use the data from the lower file until file is opened for writing. Following the previous example, doing chown() on whole image directory tree won't trigger a copy of the file's data, containers will continue sharing the page cache. For instructions on how to turn on this feature, see the documentation.

This release also properly implements regular file operations for overlayfs, removing several hacks and allowing proper interaction of read-only open files with copy-up, possibility to implement fs modifying ioctls properly, and others. Overlayfs can now act as a POSIX compliant filesystem with some features turned on, for more details see the documentation

Code copy up medata only: commit 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28

Code stack file operations: 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 10, 11, 12, 13, 13, 14, 15, 16, 17, 18, 19

1.6. New experimental EROFS file system

The new EROFS file system has been added in this release. It is a experimental project, under the staging directory, and still expects to make changes to the on-disk layout. EROFS stands for Enhanced Read-Only File System, and it is a lightweight read-only file system with a modern design (eg. page-sized blocks, inline xattrs/data, etc.) for scenarios which need high-performance read-only requirements, eg. firmwares in mobile phone or Livecds. It also provides VLE compression support, focusing on random read improvements, keeping relatively lower compression ratios, which is useful for high-performance devices with limited memory and ROM space.

Code: source

1.7. Better protection in sticky directories (eg. /tmp)

This release tries to avoid unintentional writes to an attacker-controlled FIFO or regular files by disallowing open of FIFOs or regular files not owned by the user in world writable sticky directories, unless the owner is the same as that of the directory or the file is opened without the O_CREAT flag. The purpose is to make data spoofing attacks harder. This protection can be turned on and off separately for FIFOs ( protected_fifos ) and regular files ( protected_regular ) via sysctl, just like the already existing symlinks/hardlinks protection

Code: commit

1.8. Intel Cache Pseudo-locking

This release adds support for an Intel-specific CPU feature. It allows a user to specify the amount of CPU cache space that an application can fill, it isolates that region of the CPU cache and 'locks' it. From that point on will only serve cache hits. The cache pseudo-locked memory is made accessible to user space where an application can map it into its virtual address space and thus have a region of memory with reduced average read latency. The locking is not perfect and gets totally screwed by WBINDV and similar mechanisms, but it provides a reasonable enhancement for certain types of latency sensitive applications.

Documentation: Documentation/x86/intel_rdt_ui.txt

Code: commit 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38

1.9. Even more fixes for CPU security bugs

This release includes the usual round of patches to deal with the new and exciting CPU security bugs:

x86: Add protection against L1TF, aka L1 Terminal Fault, yet another speculative hardware engineering trainwreck. It's a hardware vulnerability which allows unprivileged speculative access to data which is available in the Level 1 Data Cache. For more details, read this LWN article: Meltdown strikes back: the L1 terminal fault vulnerability; and/or see the documentation

x86: Add protection against userspace-userspace spectreRSB

x86: Support Enhanced IBRS on future Intel CPUs as the default Spectre V2 mitigation technique instead of retpoline for improved performance

Support page-table isolation protection (KPTI) for x86-32

Implement syscall wrappers in arm64 to minimize the risk of userspace-controlled values being used under speculation

KVM Shadow Paging performance improvements to improve the performance of shadow paging when the guest kernel is using KPTI

Support for flushing the count cache on context switch on some POWERPC IBM CPUs (controlled by firmware), as a Spectre v2 mitigation

Many small patches across the entire kernel to fix the possible Spectre exploitations warned by GCC

2. Core (various)

(FEATURED) Asynchronous I/O: implement IOCB_CMD_POLL commit, commit, commit, commit

Raise the minimum required gcc version to 4.6 commit

Provide a command line ( nosmt ) and a sysfs knob ( /sys/devices/system/cpu/smt/* ) to control Simultaneous Multi Threading commit

Add an option for uncompressed kernel commit

Salted build ids to allow unique build ids commit, commit, commit, commit

Set $HOSTCFLAGS and $HOSTLDFLAGS variables from the environment commit, commit, commit, commit, commit

locking: Implement an algorithm choice for Wound-Wait mutexes commit

task scheduler: Remove unused sched_time_avg_ms sysctl commit

tools/vm/page-types.c: add support for idle page tracking commit and include shared map counts commit

usercopy: Enabling HARDENED_USERCOPY may cause measurable regressions in networking performance: up to 8% under UDP flood. Allow to disable it at runtime with hardened_usercopy=off option commit

Enable early printing of hashed pointers. Aid debugging early in the boot sequence for machines that do not have a hw RNG by adding the command line option debug_boot_weak_hash commit, commit, commit, commit

virtual terminal: The vt code translates UTF-8 strings into glyph index values and stores those glyph values in the screen buffer. Because there can only be at most 512 glyphs, it is impossible to represent most unicode characters. This release introduces unicode screen support to the core console code with /dev/vcs* as a first user commit, commit, commit

proc: show fd locks taken by processes from another pidns commit

Power management: Add a new framework for idle injection, to be used by all of the idle injection code in the kernel in the future commit

Allow deferred driver probing to timeout commit, commit, commit, commit, commit, commit

driver core: Add a debugfs entry to show deferred devices commit

optimization: epoll: loosen irq safety when possible commit, commit, commit, commit

optimization: cpufreq/schedutil: Take time spent in interrupts into account commit

optimization: page_alloc: double zone's batchsize commit

3. File systems

EROFS (FEATURED) Add EROFS (Enhanced Read-Only File System), a lightweight read-only file system with modern designs for scenarios which need high-performance read-only requirements, eg. firmwares in mobile phone or LIVECDs source

BTRFS Allow defrag on opened read-only files that have rw permissions; similar to what dedupe will allow on such files commit tree checker: more checks for: block group items, essential trees commit, commit Remove V0 extent support commit

XFS Remove deprecated barrier/nobarrier mount commit

CIFS Add support for statfs for smb3.1.1 posix extensions commit Allow previous versions to be mounted with snapshot= mount parameter commit Display stats counters for number of slow commands commit Allow disabling insecure dialects in the configuration commit

EXT4 Add 64-bit timestamp support to ext4's superblock fields commit, commit, commit, commit, commit, commit

F2FS Add fsync_mode=nobarrier mount option which gives an option to user where it skips issuing cache flush commands to underlying flash storage commit Enable -o discard by default commit Introduces a new mount option fault_type to assist old fault_injection commit Support discard submission error injection commit

FAT Add FITRIM ioctl for FAT file system commit

NFS Add support for asynchronous server-side COPY operations commit, commit, commit, commit, commit, commit, commit, commit, commit

OVERLAYFS (FEATURED) Delayed copy up of data 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 (FEATURED) Stack file operations: this allows removal of several hacks from the VFS, proper interaction of read-only open files with copy-up, possibility to implement fs modifying ioctls properly, and others commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

PSTORE Add zstd compression support commit

UBIFS Allow setting assert action as mount parameter commit Introduce Kconfig symbol for xattr support commit



4. Memory management

/proc/meminfo: add percpu populated pages count commit

huge pages microoptimization: Copy target sub-page last when copy huge page, because it is possible for the application to access the begin of the huge page after copying the huge page, and copying the target sub-page last will keep the CPU caches warm for the app commit, commit, commit, commit

Introduce a tiny implementation of cgroup-aware OOM killer, which adds an ability to kill a cgroup as a single unit and so guarantee the integrity of the workload. A new knob for cgroup v2 memory controller is added: memory.oom.group . The knob determines whether the cgroup should be treated as an indivisible workload by the OOM killer. If set, all tasks belonging to the cgroup or to its descendants (if the memory cgroup is not a leaf cgroup) are killed together or not at all. Incoming releases will improve this mechanism commit, commit, commit

5. Block layer

(FEATURED) Introduce blk-iolatency io controller, a latency based io controller for cgroups commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Separates block layer statistics for discards from writes. Discards are currently bundled with writes in the various /sys/block/*/stat files as well as in /proc/diskstats . The new discard statistics are appended to the current /sys/bloc/*/stat and /proc/diskstats on output such that they are the last four entries of each. These are analogous to the four read and write statistics commit, commit, commit, commit, commit, commit

dm integrity: Add the ability to store DM integrity metadata on a separate device. This feature is activated with the option meta_device:/dev/device commit, commit, commit, commit, commit, commit, commit, commit, commit

rbd Support cloning across namespaces commit Support for images within namespaces commit

null_blk: add zone support commit

6. Tracing and perf

perf: add key binding ('p') and option ( --percent-type ) for switching between local/global percentage in annotation output/browser. Local means % within symbol, global within the whole perf data commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

tracing: Add -mcount-nop option support commit

tracing: Allow gcov profiling on only ftrace subsystem commit

kprobes: Remove jprobe API implementation commit

7. Virtualization

Hyper-V: To gather more actionable data during crashes, such as stack trace, the proposal is to write one page worth of kmsg data on an allocated page and the Hypervisor notified of the page address through the MSR commit vmbus: add numa_node to sysfs commit netvsc: Add per-cpu ethtool stats commit

virtio_net: Add XDP related stats commit, add kick stats commit

Xen Add dma-buf functionality to Xen grant device commit, commit, commit, commit, commit, commit, commit, commit Export device state to sysfs commit



8. Security

(FEATURED) Avoid unintentional writes to an attacker-controlled FIFO or regular file: disallow open of FIFOs or regular files not owned by the user in world writable sticky directories, unless the owner is the same as that of the directory or the file is opened without the O_CREAT flag. The purpose is to make data spoofing attacks harder. This protection can be turned on and off separately for FIFOs ( protected_fifos ) and regular files ( protected_regular ) via sysctl, just like the symlinks/hardlinks protection commit

kexec/firmware: support system wide policy requiring signatures. It allows the customer to define a policy which requires the kexec'ed kernel images, firmware, and/or kernel modules to be signed. In addition, this patch set includes the ability to configure a build time IMA policy, which is automatically loaded at run time without needing to specify it on the boot command line and persists after loading a custom kernel policy commit, commit, commit, commit, commit, commit, commit, commit

9. Crypto

random: add a config option to trust the CPU's hwrng commit

10. Networking

Support list based batching and stack traversal of socket buffers. It allows the network stack to receive a list of packets and process them as a unit, rather than handling each packet singly in sequence commit, commit, commit, commit, commit, commit, commit, commit, commit, merge

Maintain IP fragment queue in an rbtree, but optimize properly for in-order frags commit, commit, commit, commit, commit

Improve handling of ACKs on hole repairs commit, commit, commit, commit

TCP Add SNMP counter ( LINUX_MIB_TCPZEROWINDOWDROP for zero-window drops commit Add SNMP counter ( LINUX_MIB_TCPRCVQDROP ) for drops when try to queue in rcv queue commit Adds 3 RFC4898 stats: tcpEStatsPerfHCDataOctetsOut , tcpEStatsPerfOctetsRetrans , tcpEStatsStackDSACKDups and an addtional stat to record the number of data packet reordering events seen, tcp_reord_seen commit, commit, commit, commit, commit Make TCP_USER_TIMEOUT socket option more accurate commit, commit, commit

IPv4: Control socket buffer reprioritization after forwarding. After IPv4 packets are forwarded, the priority of the corresponding socket buffer is updated according to the TOS field of IPv4 header. This overrides any prioritization done earlier by e.g. an skbedit action or ingress-qos-map defined at a vlan device. A sysctl ( ip_forward_update_priority ) is added that lets users prevent this behaviour commit, commit, commit, commit, commit, commit, commit

IPv6 Preventing the kernel from responding to ICMP Echo Requests messages can be useful in several ways. For IPv4, the sysctl icmp_echo_ignore_all could be used for this function, this release adds a echo_ignore_all sysctl for the IPv6 equivalent commit ila: Add ILA_CMD_FLUSH netlink command to clear the ILA translation table commit

route: add support for directed broadcast forwarding. It implements the feature described in rfc1812 section-5.3.5.2 and rfc2644. It allows the router to forward directed broadcast when sysctl bc_forwarding is enabled commit, commit

(FEATURED) Support 802.11ax High-Efficiency wireless commit, commit, commit, commit

802.11: Extend scan privacy by randomizing the sequence number of the probe request frames transmitted, and reducing the probe request content to just the SSID, supported rates, DS element and - if given - requested elements from userspace commit, commit, commit, commit, commit

TLS: Generic infrastructure to offload TLS crypto to a network devices. It enables the kernel TLS socket to skip decryption and authentication operations for SKBs marked as decrypted on the receive side of the data path. Leaving those computationally expensive operations to the NIC commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Support for Tx queue selection based on Rx queue(s) map. This is done by configuring Rx queue(s) map per Tx-queue using sysfs attribute. If the user configuration for Rx queues does not apply, then the Tx queue selection falls back to XPS using CPUs and finally to hashing commit, commit, commit, commit, commit, commit, commit

Add virtual XFRM interfaces to route IPSec traffic, which avoid all of the limitations of existing IPSEC tunnels commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, merge

Support DSCP and flowlabel per-transport in SCTP commit, commit, commit, commit, commit

Add parameter support to devlink commit, commit, commit, commit, commit, commit, commit, commit

Support regions and region snapshots in devlink, allowing users access to driver defined address regions and reading and dumping snapshots from them commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

devlink: Add enable_sriov parameter to enables SR-IOV commit

Allow to attach XDP programs to both HW and SW at the same time on a given device. This enables advanced use cases where some of the work is offloaded to the NIC and some is done by the host commit, commit, commit, commit, commit, commit, commit

bridge: a new bridge port option that allows any port to have any other port (in the same bridge of course) as its backup and traffic will be forwarded to the backup port when the primary goes down. This is mainly used in MLAG and EVPN setups where we have peerlink path which is a backup of many (or even all) ports and is a participating bridge port itself commit, commit

packet scheduler: Introduce a set of kernel interfaces that can be used by applications that require (time-based) Scheduled Tx of packets. It adds a new SO_TXTIME socket option, and the ETF "earliest txtime first" qdisc, that provides per-queue TxTime-based scheduling. For applications/systems that the concept of time slices isn't precise enough, the etf qdisc allows applications to control the instant when a packet should leave the network controller. Recomended LWN article: Time-based packet transmission. commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, merge (FEATURED) Add Common Applications Kept Enhanced (cake) qdisc (paper). sch_cake targets the home router use case and is intended to squeeze the most bandwidth and latency out of even the slowest ISP links and routers, while presenting an API simple enough that even an ISP can configure it commit, commit, commit, commit, commit, commit, commit, commit Allow the flower classifier to match on tunnel options and the tunnel key action to set them commit, commit Add skbprio, the SKB priority queue scheduler. It schedules packets according to skb->priority, which is useful for request packets in DoS mitigation systems such as Gatekeeper commit set/match the tos/ttl fields of TC based IP tunnels commit, commit, commit Introduce matching on double vlan/QinQ headers for TC flower commit, commit, commit, commit, commit Add new action inheritdsfield. It copies the field DS of IPv4 and IPv6 packets into skb->priority. This enables later classification of packets based on the DS field commit Add support for slotting with non-uniform distribution to netem packet scheduler commit Support for templates in packet scheduler classifier commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

RDS: IPv6 support commit, commit, commit

TIPC: Extend the existing TIPC socket diagnostics framework for information related to TIPC group communication commit

Add Geneve Options support to the TC tunnel key action. It provides the plumbing required to configure Geneve variable length options commit, commit, commit, commit

Bluetooth Implement Get, Set PHY Configuration and setting of PHY in Advertising. Also implemented extended advertising, scanning and connection commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Add HCI command for clear Resolv list commit

Basic implementation of veth driver XDP commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

BPF Implement cgroup local storage for bpf programs. The main idea is to provide a fast accessible memory for storing various per-cgroup data, e.g. number of transmitted packets. Cgroup local storage looks as a special type of map for userspace, and is accessible using generic bpf maps API for reading and updating of the data. The (cgroup inode id, attachment type) pair is used as a map key. A user can't create new entries or destroy existing entries; it happens automatically when a user attaches/detaches a bpf program to a cgroup commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY and BPF_PROG_TYPE_SK_REUSEPORT to allow userspace to be capable of directly setting up a bpf map which can then be consumed by the bpf prog to make decision. In this case, decide which SO_REUSEPORT sk to serve the incoming request. By adding BPF_MAP_TYPE_REUSEPORT_SOCKARRAY , the userspace has total control and visibility on where a SO_REUSEPORT sk should be located in a bpf map. BPF_PROG_TYPE_SK_REUSEPORT allows the bpf prog to directly select a sk from the bpf map commit, commit, commit,commit, commit, commit, commit, commit, commit Introduce a new bpftool command: cgroup tree. The idea is to iterate over the whole cgroup tree and print all attached programs commit, commit, commit Add support to call bpf_get_socket_cookie() helper from two more program types: BPF_PROG_TYPE_CGROUP_SOCK_ADDR and BPF_PROG_TYPE_SOCK_OPS commit, commit, commit, commit Add TCP-BPF callback for listening sockets commit, commit, commit, commit, commit, commit Print bpftool map data with btf commit, commit, commit Add support for sharing BPF objects within one ASIC. This will allow us to reuse of the same program on multiple ports of a device leading to better code store utilization. It also enables sharing maps between programs attached to different ports of a device commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Extend the abilities of bpftool prog load beyond the simple cgroup use cases. Three new parameters are added: type - allows specifying program type; map - allows reusing existing maps; dev - offload/binding to a device commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

ieee802154 Let userspace access rx Link Quality Indication information commit hwsim: add replacement for fakelb commit

ipmr: Add support for IGMPMSG_WRVIFWHOLE which is used to pass full packet and real vif id when the incoming interface is wrong commit

libceph: support for cephx v2 commit, commit, commit, commit, commit, commit, commit, commit

netfilter nftables lightweight tunneling support commit, commit nftables: Add native tproxy support commit nftables: implement Passive OS fingerprint commit, commit, commit Allows to add, list and delete connection tracking timeout policies via nft objref infrastructure and assigning these timeout via nft rule commit

openvswitch: add kernel datapath clone action. In case the actions within clone do not modify the current flow, the actions are executed without making a copy of current key before execution commit

netlink If an invalid MTU value is set through rtnetlink return extra error information commit Report the minimum and maximum MTU allowed on a device via netlink commit

SCTP: add support for SCTP_REUSE_PORT sockopt commit

smc: pnetid and SMC-D support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

11. Architectures

ARM New SoCs/platforms Raspberry Pi Compute Module (CM1) and IO board commit i.MX6SSL from NXP Renesas RZ/N1D SoC (R9A06G032), Dual Cortex-A7 with Ethernet, CAN and PLC interfaces commit, commit TI AM654 SoC, Quad Cortex-A53, safety subsystem with Cortex-R5 controllers, communication and PRU subsystem and lots of other interfaces (PCIe, USB3, etc) commit, commit New boards and systems Several Atmel at91-based boards from Laird commit, commit, commit Marvell Armada388-based Helios4 board from SolidRun commit Samsung Aires-based phones (s5pv210) commit, commit, commit Allwinner A64-based Pinebook laptop commit Other Device Tree Sources Add S805X based P241 board commit meson-gxl: add support for the Oranth Tanix TX3 Mini commit meson-gxl: add support for the S905W SoC and the P281 board commit Add Mediatek X20 Development Board support commit rockchip: add 96boards RK3399 Ficus board commit rockchip: add Google Bob commit zynqmp: Add support for Avnet Ultra96 rev1 board commit zynqmp: Remove ep108 board commit Add DT support for Octavo Systems OSD3358-SM-RED based on TI AM335x commit Add devicetree for Storlink/Storm SL93512R commit BCM5301X: Add support for Linksys EA9500 commit add support for Gatwick board based on WB50N commit am335x: add am335x-sancloud-bbe board support commit imx31: add LogicPD MX31Lite board description commit imx53: Add support for imx53 HSC/DDC boards from K+P commit imx6dl: Add Engicam i.CoreM6 1.5 Quad/Dual MIPI starter kit support commit imx6ul: Add DTS for ConnectCore 6UL SBC Express commit imx6ul: Add DTS for ConnectCore 6UL System-On-Module (SOM) commit imx: Add ZII SCU2 Mezz board commit imx: Add ZII SCU3 ESB commit imx: Add basic support for imx6sll EVK board commit, commit vf610: Add ZII CFU1 board commit vf610: Add ZII SSMB SPU3 board commit zynq: Add support for Z-turn board commit OMAP2+: sleep33/43xx: Add RTC-Mode support commit at91: pm: Add ULP1 mode support commit shmobile: Add the R9A06G032 SMP enabler driver commit KVM Add KVM_GET/SET_VCPU_EVENTS . Together with appropriate user space changes, user space can get/set the SError exception state to do migrate/snapshot/suspend commit, commit, commit Support for Group0 interrupts in guests commit, commit, commit vgic: Let userspace opt-in to writable v2 IGROUPR commit coresight: ETM: Add support for Arm Cortex-A73 and Cortex-A35 commit coresight: Introduce support for Coresight Address Translation Unit commit arm64: implement syscall wrappers to minimize the risk of userspace-controlled values being used under speculation commit arm64: Wire up support for qspinlock, replacing the ticket lock code commit arm64: Add support for STACKLEAK gcc plugin commit

X86 (FEATURED) Add protection against L1TF, aka L1 Terminal Fault, yet another speculative hardware engineering trainwreck. It's a hardware vulnerability which allows unprivileged speculative access to data which is available in the Level 1 Data Cache. While Meltdown breaks the user space to kernel space protection, L1TF allows to attack any physical memory address in the system and the attack works across all protection domains. It allows an attack of SGX and also works from inside virtual machines because the speculation bypasses the extended page table (EPT) protection mechanism. A l1tf boot option, with several parameters, is provided to control the mitigations applied by the kernel. FOr more details, see Documentation/admin-guide/l1tf.rst merge (FEATURED) Add protection against userspace-userspace spectreRSB commit (FEATURED) Support page-table isolation protection for x86-32 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 (FEATURED) intel_rdt: support Cache Pseudo-Locking. Cache Allocation Technology (CAT), part of Intel Resource Director Technology, enables a user to specify the amount of cache space into which an application can fill. Cache pseudo-locking builds on the fact that a CPU can still read and write data pre-allocated outside its current allocated area on cache hit. With cache pseudo-locking data can be preloaded into a reserved portion of cache that no application can fill, and from that point on will only serve cache hits. The cache pseudo-locked memory is made accessible to user space where an application can map it into its virtual address space and thus have a region of memory with reduced average read latency 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 Support Enhanced IBRS on future Intel CPUs as the default Spectre V2 mitigation technique instead of



retpoline for improved performance commit

intel_th: pci: Add Ice Lake PCH support commit

iommu/amd: Add support for IOMMU XT mode commit

iommu/amd: Add basic debugfs infrastructure for AMD IOMMU commit

perf: support the Extended PEBS feature, introduced in Goldmont Plus microarchitecture, supports all events as "Extended PEBS" commit, commit, commit, commit

platform Add ACPI i2c-multi-instantiate pseudo driver commit asus-wmi: Add keyboard backlight toggle support commit intel-hid: Add support for Device Specific Methods commit intel-vbtn: Add support for dock mode detection commit silead_dmi: Add touchscreen info for the Chuwi Vi10 tablet commit thinkpad_acpi: Add support for calculator hotkey commit

tsc: Redefine notsc to behave as tsc=unstable commit

KVM Shadow Paging performance improvements to improve the performance of shadow paging when the guest kernel is using KPTI commit, commit, commit, commit, commit, commit, commit, commit, commit, commit , commit, ,commit, commit, commit, commit, commit, commit Implement exit-less IPIs support commit, commit, commit nVMX: nested VMCS shadowing. It expose VMCS Shadowing feature to L1 guest. This is done in order to accelerate the use-case of Triple-Virtualization commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit Nested VMX live migration commit

Hyper-V: Introduce PV guest address space mapping flush support commit, commit, commit, commit

MIPS Introduce NT_MIPS_DSP & NT_MIPS_FP_MODE ELF notes & corresponding regsets to expose DSP ASE & floating point mode state respectively, both for live debugging & core dumps commit, commit Loongson: Add Loongson-3A R3.1 basic support commit Make elf2ecoff work on 64bit host machines commit ath79: add support for QCA953x QCA956x TP9343 commit

NDS32 ftrace Support static function tracer commit Support static function graph tracer commit Support dynamic function tracer commit Support dynamic function graph tracer commit Add RECORD_MCOUNT support commit

POWERPC Add barrier_nospec implementation for NXP PowerPC Book3E commit Support for flushing the count cache on context switch on some IBM CPUs (controlled by firmware), as a Spectre v2 mitigation commit, commit, commit, commit, commit Disable the speculation barrier from the command line commit via-pmu: Replace via-pmu68k driver with via-pmu driver commit via-pmu: Add support for m68k PowerBooks commit powernv: Add support to enable sensor groups commit Remove POWER9 DD1 support commit

S390 Host large page support for KVM guests commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit ftrace: Add -mfentry and -mnop-mcount support commit qeth: add statistics for consumed buffer elements commit zcrypt: AP bus support for alternate driver(s) commit zcrypt: Show load of cards and queues in sysfs commit Support for perf report -D commit perf list: Add support for detailed PMU event description commit perf report: Add support for s390 auxiliary trace commit, commit perf stat: Add transaction flag (-T) support for s390 commit



12. Drivers

12.1. Graphics

Add vkms, the Virtual Kernel Mode-Setting driver. It creates a very basic kms driver with 1 crtc/encoder/connector/plane. VKMS driver would be useful for testing, or for running X (or similar) on headless machines and be able to still use the GPU. Thus it enables a virtual display without the need for hardware display capability commit, commit

console/fbcon: defer fbcon taking over the console from the dummy console until the first text is displayed on the console. Together with the "quiet" kernel commandline option, this allows fbcon to still be used together with a smooth graphical bootup commit

vmwgfx: support for multisample surfaces commit, commit, commit, commit

Displayport support for CEC tunneling over AUX commit

efifb: BGRT: Add nobgrt option commit

debugfs: Add internal client debugfs file commit

amdgpu Modify CS IOCTL to allow its input as command buffer and an array of buffer handles to create a temporay bo list and then destroy it when IOCTL completes. This saves on calling for BO_LIST create and destry IOCTLs in MESA and by this improves performance commit Add stutter mode control in a module parameter for RV. Stutter mode can save power in low DRAM use cases including but not limited to productivity application use, web browsing, and video playback commit JPEG engine support on VCN merge Add a sysfs entry to read GPU load from userspace commit DP YCbCr 4:2:0 support commit Set/read lane settings through debugfs commit Add new polaris pci id commit Remove internal/unused kernel module parameters commit

amdkfd Add Raven support commit Add CU-masking ioctl to KFD. It allows a KFD client to control the set of CUs used by a user mode queue for executing compute dispatches. This can be used for optimizing the partitioning of the GPU and minimize conflicts between concurrent tasks commit Add debugfs interface to trigger HWS hang commit

i915 Icelake: Add power well support commit Icelake: Add DSI support commit Introducing Whiskey Lake platform commit Introducing Amber Lake platform commit Remove support for legacy debugfs crc interface commit Add DisplayPort CEC-Tunneling-over-AUX support commit gvt: Add 64K huge gtt support commit and 2M huge gtt support commit

armada: Atomic modesetting support completed commit, commit, commit, commit

sun4i R40 display engine support commit Add TCON TOP driver commit

mediatek: MT2712 SoC support merge

msm: Add A6XX device support commit

mali-dp Add RGB writeback formats for DP500 commit Add debugfs file for reporting internal errors commit

panel Add Ilitek ILI9881c panel driver commit Add support for the EDT ETM0700G0BDH6 commit Add support for the EDT ETM0700G0EDH6 commit p079zca: Support Innolux P097PFG panel commit simple: Add Innolux TV123WAM panel driver support commit simple: Add Sharp LQ035Q7DB03 panel support commit simple: Add newhaven, nhd-4.3-480272ef-atxl LCD commit simple: Add support for BOE HV070WSA-100 panel to simple-panel commit simple: Add support for DataImage SCF0700C48GGU18 commit simple: Add support for Rocktech RK070ER9427 LCD panel commit Add AUO g070vvn01 display support (800x480) commit

pl111: Support Nomadik LCDC variant commit

tinydrm: new driver for ILI9341 display panels commit

vc4 Add support for SAND modifier commit Add support for the transposer block commit

ipu-v3: add support for XRGB32 and XBGR32 V4L2 pixel formats commit

12.2. Storage

nvme: implement the Namespace Write Protect feature described in "NVMe TP 4005a Namespace Write Protect" commit, commit, commit

nvme: Add support for Asynchronous Namespace Access as specified in NVMe 1.3 TP 4004 commit, commit, commit, commit, commit, commit, commit, commit

nvmet-rdma: support max(16KB, PAGE_SIZE) inline data commit

nvmet: add commands supported and effects log page commit

scsi Switch to scsi-mq by default commit tcmu: add module wide block/reset_netlink support commit ufs: add Hisilicon ufs driver code commit lpfc: Support duration field in Link Cable Beacon V1 command commit megaraid_sas: Support FW provided TM timeout values commit remove NCR_D700 driver commit remove NCR_Q720 driver commit

ata: sata_rcar: Add r8a77965 support commit

12.3. Drivers in the Staging area

(FEATURED) erofs: Add EROFS (Enhanced Read-Only File System), a lightweight read-only file system with modern designs for scenarios which need high-performance read-only requirements, eg. firmwares in mobile phone or LIVECDs source

Gasket driver framework + Apex driver commit

imx: add support for RGB565_2X8 on parallel bus commit

Add driver for Xilinx AXI-Stream FIFO v4.1 IP core commit

fsl-mc: Move DPIO from staging to drivers/soc/fsl commit

vboxvideo: Add page-flip support commit

Remove Skein and Threefish code commit

comedi: drop serial2002 driver commit

iio: Drop ADIS16060 driver from staging commit

mt7621-gpio: remove driver from staging commit

12.4. Networking

Bluetooth Add a new Realtek 8723DE ID 0bda:b009 commit btqca: Add wcn3990 firmware download support commit btrtl: add support for retrieving the UART settings commit btrtl: add support for the RTL8723BS and RTL8723DS chips commit hci_h5: Add support for the RTL8723BS commit hci_h5: Add support for enable and device-wake GPIOs commit hci_h5: Add support for serdev enumerated devices commit hci_qca: Add support for Qualcomm Bluetooth chip wcn3990 commit hci_qca: Enable 3.2 Mbps operating speed commit mediatek: Add protocol support for MediaTek serial devices commit

Infiniband/mlx5: Introduce mlx5 DEVX interface. It enables direct access from the user space area to the mlx5 device driver by using the KABI mechanism. The main purpose here is to make the user space driver as independent as possible from the kernel so that future device functionality and commands can be activated with minimal to none kernel changes commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Infiniband/mlx5: Support RoCE ICRC encapsulated error counter commit

RDMA/hns: Add 50GE type of hnae3 device match commit

RDMA/hns: Add TPQ link table support commit and TSQ link table support commit

hns3: Add vlan filter setting by ethtool command -K commit

aquantia: Add ethtool operations: renegotiate commit, ring size configuration commit, rx/tx flow control ethtools callback commit

ath6kl: add support for Dell Wireless 1537 commit

ath10k: add debugfs file warm_hw_reset commit

ath10k: support for multicast rate control commit

bnxt_en: Add DCBNL DSCP application protocol support commit

bnxt_en: Add external loopback test to ethtool selftest commit

bnxt_en: Add hwmon sysfs support to read temperature commit

bnxt_en: Add support for ethtool get dump commit

can kvaser_usb: Add support for Kvaser USB hydra family commit ucan: add driver for Theobroma Systems UCAN devices commit xilinx_can: add support for Xilinx CAN FD core commit

cxgb4: Add new T5 PCI device id 0x50ae commit, 0x50af and 0x50b0 commit

cxgb4: add support to display DCB info commit

cxgb4: Support ethtool private flags commit

dpaa_eth: add support for hardware timestamping commit

dpaa_eth: add the get_ts_info interface for ethtool commit

dsa Add Vitesse VSC73xx DSA router driver commit add support for ksz9897 ethernet switch commit mv88e6xxx: 6390 vs 6390X SERDES support commit mv88e6xxx: Add hwtimestamp support for the 6165 commit mv88e6xxx: Add mv88e6165 PTP support commit mv88e6xxx: add phylink support commit realtek-smi: Add Realtek SMI driver commit rtl8366rb: Support port 4 (WAN) commit

ti: cpsw: add CBS Qdisc offload commit

ti: cpsw: add MQPRIO Qdisc offload commit

fsl/fman: add set_tstamp interface commit

fsl/fman_port: support getting timestamp commit

ice: Report stats for allocated queues via ethtool stats commit

igb: Add support for ETF offload commit

iw_cxgb4: Support FW write completion WR commit

iwlwifi: add module parameter to disable 802.11ax commit

iwlwifi: add support for 22560 devices commit

iwlwifi: add support for IEEE802.11ax commit

iwlwifi: add a bunch of PCI IDs for 22000 and 22560 commit

ixgbe: add ipsec security registers into ethtool register dump commit

lan743x: Add EEE support commit

lan743x: Add RSS support commit

lan743x: Add power management support commit

lan743x: Add support for ethtool eeprom access commit, get_drvinfo commit, link settings commit, message level commit, statistics commit

lan743x: lan743x: Add PTP support commit

mlx4: Add support for devlink reload and load driverinit values commit

mlx5: Add core support for double vlan push/pop steering action commit

mlx5: Add support for flow table destination number commit

mlx5: Expose MPEGC (Management PCIe General Configuration) structures commit

mlx5: FW tracer commit, commit

mlx5e: Add NAPI statistics commit

mlx5e: Add TX completions statistics commit

mlx5e: Add XDP_TX completions statistics commit

mlx5e: Add support for XDP_REDIRECT in device-out side commit

mlx5e: Add UDP GSO support commit

mlx5e: Add channel events counter commit

mlx5e: support for ethtool rxnfc flow steering commit, commit, commit, commit

mlx5e: Offload setting/matching on tunnel tos/ttl commit, commit, commit

mlx5e: Support offloading double vlan push/pop tc actions commit

mlx5e: Support offloading tc double vlan headers match commit

mlxsw: Introduce initial Spectrum-2 support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

mlxsw: Introduce algorithmic TCAM support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

mlxsw: Support DSCP prioritization and rewrite commit, commit, commit, commit, commit, commit, commit, commit

mscc: ocelot: add VLAN filtering commit

mscc: ocelot: add bonding support commit

mt76: Add support for MediaTek MT76x0U (USB) commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

mt76: Add support for MT76x2u, a 2x2 USB 802.11ac chipset by MediaTek commit, commit, commit, commit

mt7601u: expose 802.11w support commit

mvpp2: add a debugfs interface commit, commit, commit, commit

mvpp2: mvpp2: add RSS support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

nfp bpf: support u16 and u32 multiplications commit bpf: support u32 divide commit bpf: xdp_adjust_tail support commit expose ring stats of inactive rings via ethtool commit flower: add geneve option match offload commit flower: add geneve option push action offload commit flower: allow matching on ipv4 UDP tunnel tos and ttl commit flower: enabled offloading of Team LAG commit flower: offload tos and tunnel flags for ipv4 udp tunnels commit implement netpoll ndo (thus enabling netconsole) commit

phy: Add support for Broadcom Omega internal Combo GPHY commit

phy: Add support to configure clock in Broadcom iProc mdio mux commit

phy: realtek: Support RTL8366RB variant commit

phy: realtek: add missing entry for RTL8211C to mdio_device_id table commit

phy: realtek: add support for RTL8211 commit

phy: realtek: add support for RTL8211C commit

phy: sfp: Add HWMON support for module sensors commit

phy: vitesse: Add support for VSC73xx commit

qed/qede: Multi CoS support commit

qed: Add Multi-TC RoCE support commit

qede: Add destination ip based flow profile commit

qede: Add driver callbacks for eeprom module query commit

qede: Ingress tc flower offload (drop action) support commit

qedr: Add support for kernel mode SRQ's commit

qedr: Add user space support for SRQ commit

qmi_wwan: Support dynamic config on Quectel EP06 commit

qtnfmac: enable multiple SSIDs scan support commit

qtnfmac: enable source MAC address randomization support commit

qtnfmac: implement net_device_ops callback to set MAC address commit

qtnfmac: implement basic WoWLAN support commit

qtnfmac: implement cfg80211 power management callback commit

r8169: Reinstate ASPM Support commit

r8169: add support for NCube 8168 network card commit

r8169: enable ASPM on RTL8106E commit

r8169: remove TBI 1000BaseX support commit

rsi: add firmware support for AP+BT dual mode commit

sh_eth: Add R7S9210 support commit

stmmac: adds support for 10Gigabit IP. The IP is called XGMAC2 commit, commit, commit, commit, commit, commit, commit

stmmac: Add support for CBS QDISC commit

ucc_geth: Add BQL support commit

wil6210: allow scan on AP interface commit

wil6210: add 3-MSI support commit, commit

wil6210: add TX latency statistics commit

wil6210: add support for enhanced DMA RX data flows commit, enhanced DMA TX data flows commit, enhanced DMA debugfs commit

wil6210: add support for link statistics commit

wil6210: add support for Talyn-MB (Talyn ver 2.0) device commit, commit, commit, commit

wil6210: support max aggregation window size 64 commit

12.5. Audio

firewire-motu: add support for Motu Traveler commit

hda/ca0132: Adds support for the Recon3D PCI-E card commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

hda/realtek: Comprehensive model list for ALC262 commit, ALC268 commit, ALC882 & co commit

usb-audio: add support for UAC3 Power Domains. This feature of the USB audio class 3 allows the host to notify the device what it is making use of so power comsumption can be optimized commit, commit, commit, commit

usb-audio: Add support for Encore mDSD USB DAC commit

ASoC Intel: Boards: Add GLK Realtek Maxim I2S machine driver commit core: add support to card re-bind using component framework commit es7134: add support for the es7154 commit es7241: add es7241 codec support commit meson: adds support for the audio subsystem found on Amlogic's axg SoC family. The first SoC of this family is the A113D/X targeted at smart speaker application. The G12a SoC family, Amlogic next-gen STB chipset, will reuse this audio subsystem commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit qcom: add sdm845 sound card support commit rt5651: Add IN3 Boost volume control commit rt5651: Add button press support commit rt5682: add rt5682 codec driver commit stm32: sai: add iec958 controls support commit tas517x: add tas5707 support commit uniphier: add support for multichannel output commit wcd9335: add CLASS-H Controller support commit wcd9335: add support to wcd9335 codec commit wm_adsp: Allow up to 8 channels for voice control commit



12.6. Tablets, touch screens, keyboards, mouses

Add MT_TOOL_DIAL commit

Add bu21029 touch driver commit

egalax_ts: add system wakeup support commit

elantech: enable middle button of touchpad on ThinkPad P72 commit

touchscreen: resistive-adc-touch: add generic resistive ADC touchscreen commit

elan_i2c: add ACPI ID for Lenovo IdeaPad 330-15IGM commit

HID: Add support for Apple Magic Keyboards commit cougar: Add support for the Cougar 500k Gaming Keyboard commit elan: Add USB-id for HP x2 10-n000nd touchpad commit elan: Add support for touchpad on the Toshiba Click Mini L9W commit hid-saitek: Add device ID for RAT 7 Contagion commit input: enable Totem on the Dell Canvas 27 commit intel-ish-hid: Enable Ice Lake mobile commit intel-ish-hid: Enable Sunrise Point-H ish driver commit microsoft: support the Surface Dial commit wiimote: add support for Guitar-Hero devices commit



12.7. TV tuners, webcams, video capturers

v4l2-ctrl: Add control for VP9 profile commit

v4l: enables the video standards to be controlled directly on the subdev device node commit

v4l: Add new 10-bit packed grayscale format commit, add new 2X8 10-bit grayscale media bus code commit

vicodec: the Virtual Codec driver, a driver that emulates a HW codec commit, commit, commit, commit, commit

ak7375: Add ak7375 lens voice coil driver commit

camss: Add support for 10-bit grayscale formats commit

camss: Add support for 8x96 on csid commit, ispif commit, vfe commit

camss: Add support for RAW MIPI14 on 8x96 commit

camss: vfe: Add support for UYVY output from VFE on 8x96 commit

coda: add read-only h.264 decoder profile/level controls commit

dvb-frontends: add Socionext MN88443x ISDB-S/T demodulator driver commit

dw9807: Add dw9807 vcm driver commit

i2c: Add driver for Aptina MT9V111 commit

i2c: Copy rj54n1cb0c soc_camera sensor driver commit

i2c: lm3560: add support for lm3559 chip commit

imx274: add cropping support via SELECTION API commit

ov2680: Add Omnivision OV2680 sensor driver commit

ov5640: add HFLIP/VFLIP controls support commit

ov5640: add support of module orientation commit

ov772x: add media controller support commit

platform: Add ChromeOS EC CEC driver commit

rcar-vin: Add support for R-Car R8A77995 SoC commit, enable support for r8a77965 commit

smiapp: Support the "rotation" property commit

uvcvideo: Add KSMedia 8-bit IR format support commit

venus: add HEVC codec support commit

venus: hfi: preparation to support venus 4xx commit

venus: implementing multi-stream support commit

video-i2c: add hwmon support for amg88xx commit

12.8. Universal Serial Bus

Report wakeup events on root-hub ports commit

typec: tcpm: Support for Alternate Modes commit

typec: tcpci: move tcpci drivers out of staging commit

Add USB ehci support for nuvoton npcm7xx platform commit

option: add support for DW5821e commit

serial: kl5kusb105: remove KLSI device id commit

serial: pl2303: add a new device id for ATEN commit

serial: simple: add Motorola Tetra MTP6550 id commit

dwc3: Add a glue driver for Synopsys HAPS platform commit

host: exynos: Remove support for Exynos5440 commit

usbtmc: Add ioctl for EOM bit commit

usbtmc: Add ioctl for termination character commit

usbtmc: Add ioctl for trigger commit

usbtmc: Add ioctls to set/get usb timeout commit

12.9. Serial Peripheral Interface (SPI)

Add SPI controller driver for UniPhier SoC commit

dw-mmio: add MSCC Ocelot support commit

pxa2xx: Add support for Intel Ice Lake commit

spi-gpio: add SPI_3WIRE support commit

12.10. Watchdog

Add driver for the MEN 16z069 IP-Core commit

12.11. Serial

sh-sci: Add support for R7S9210 commit

qcom_geni_serial: Add support for flow control commit

12.12. ACPI, EFI, cpufreq, thermal, Power Management

ACPI / EC: Add another entry for Thinkpad X1 Carbon 6th commit

thermal: armada: add multi-channel sensors support commit

thermal: tsens: Add generic support for TSENS v2 IP commit

12.13. Real Time Clock (RTC)

isl1208: add support for isl1219 with tamper detection commit

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

power: reset: qcom-pon: Add Qcom PON driver commit

power: supply: add cros-ec USBPD charger driver commit

regulator: Add support for CPCAP regulators on Motorola Xoom devices commit

regulator: add QCOM RPMh regulator driver commit

regulator: bd9571mwv: Add support for toggle power switches commit

regulator: bd9571mwv: Use "backup_mode" sysfs file instead of "wake_up" commit

regulator: pfuze100: add support to en-/disable switch regulators commit

regulator: uniphier: add regulator driver for UniPhier SoC commit

12.15. Pin Controllers (pinctrl)

ocelot: add support for interrupt controller commit

intel: Add Ice Lake PCH pin controller support commit

imx: add driver for i.MX8MQ commit

berlin: add the as370 SoC pinctrl driver commit

12.16. Multi Media Card (MMC)

renesas_sdhi: add eMMC HS400 mode support commit

sdhci-of-dwcmshc: add SDHCI OF Synopsys DWC MSHC driver commit

sdhci-pci-dwc-mshc: synopsys dwc mshc support commit

sdhci-pci: Add support for Intel ICP commit

sdhci: Add support for O2 eMMC HS200 mode commit

sdhci: Add support for O2 hardware tuning commit

tmio: add eMMC HS400 mode support commit

12.17. Memory Technology Devices (MTD)

nand: Add core infrastructure to support SPI NANDs commit

rawnand: add NVIDIA Tegra NAND Flash controller driver commit

rawnand: atmel: add module param to avoid using dma commit

spinand: Add initial support for Micron MT29F2G01ABAGD commit, Winbond W25M02GV commit, MX35LF1GE4AB commit, MX35LF2GE4AB commit

ubi: provide a way to skip CRC checks commit, commit

12.18. Industrial I/O (iio)

Add channel for Phase commit

Add channel for Position Relative commit

accel: adxl345: add calibration offset support commit

accel: adxl345: add sampling frequency support commit

adc: Add Spreadtrum SC27XX PMICs ADC support commit

adc: at91-sama5d2_adc: add support for position and pressure channels commit

adxl345: Add support for the ADXL375 commit

chemical: Add support for Bosch BME680 sensor commit

dac: Add AD5758 support commit

light: introduce si1133 commit

vcnl4000: add VCNL4010 and VCNL4020 device id commit

vcnl4000: add support for VCNL4200 commit

ad5686: Add AD5311R support commit

12.19. Multi Function Devices (MFD)

Add support for Cirrus Logic CS47L35/L85/L90/L91 codecs commit, commit, commit, commit, commit, commit, commit, commit, commit

bd71837: Core driver for ROHM BD71837 PMIC commit

da9063: Add DA9063L support commit

intel-lpss: Add Ice Lake PCI IDs commit

12.20. Pulse-Width Modulation (PWM)

mediatek: Add MT7628 support commit

fsl-ftm: Enable support for the new SoC i.MX8QM commit

12.21. Inter-Integrated Circuit (I2C)

Add Actions Semiconductor Owl family S900 I2C driver commit

Adds an algorithm for an I2C master physically located on an FSI slave device commit, commit, commit, commit, commit, commit, commit

i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller commit

i801: Add support for Intel Ice Lake commit

tegra: Add support for Tegra194 commit

12.22. Hardware monitoring (hwmon)

Add support for RPi voltage sensor commit

Add support for power min, lcrit, min_alarm and lcrit_alarm commit

Add NPCM7xx: PWM and Fan driver commit

k10temp: Support Threadripper 2920X, 2970WX commit, commit

mlxreg-fan: Add support for Mellanox FAN driver commit

12.23. General Purpose I/O (gpio)

it87: Add support for IT8613 commit

tegra186: Add support for Tegra194 commit

mt7621: Add a driver for MT7621 commit

12.24. Leds

lm3692x: Support LED sync configuration commit

12.25. DMA engines

Add Actions Semi Owl family S900 DMA driver commit

imx-sdma: add virt-dma support commit

12.26. Hardware Random Number Generator (hwrng)

msm: remove msm hw_random driver commit

12.27. Cryptography hardware acceleration

Add support for the SHA512 and SHA384 algorithms in the Inside Secure SafeXcel driver commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Introduce the EIP197d engine support to the Inside Secure SafeXcel driver commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit

Adds support for more algorithms in the Inside Secure SafeXcel driver: MD5 (and its hmac), DES (ECB and CBC), and 3DES (ECB and CBC) commit, commit, commit, commit

ccp: Add support for new CCP/PSP device ID commit

hisilicon: SEC security accelerator driver commit

qcom-rng: Add Qcom prng driver commit

12.28. PCI

Add pci=disable_acs_redir parameter to disable ACS redirection for peer-to-peer DMA support (we don't have the peer-to-peer support yet; this is just one piece) commit, commit, commit

AER: Add sysfs attributes for rootport cumulative stats commit

AER: Add sysfs attributes to provide AER stats and breakdown commit

kirin: Add MSI support commit

pciehp: Support interrupts sent from D3hot commit

hotplug: Delete skeleton driver commit

tools: Add MSI-X support commit

12.29. FRU Support Interface (FSI)

Add new central chardev support commit

Add cfam char devices commit

sbefifo: Add driver for the SBE FIFO commit

12.30. Clock

Add driver for MAX9485 commit

actions: Add S700 SoC clock support commit

at91: add I2S clock mux driver commit

meson: add axg audio sclk divider driver commit

meson: add clk-phase clock driver commit

meson: add triple phase clock driver commit

qcom: Add display clock controller driver for SDM845 commit

qcom: clk-rpmh: Add QCOM RPMh clock driver commit

renesas: Renesas R9A06G032 clock driver commit

rockchip: add clock controller for px30 commit

rockchip: add support for half divider commit

samsung: Remove support for Exynos5440 commit

tegra: Add sdmmc mux divider clock commit

timer-mediatek: Add support for system timer commit

New RISC-V SBI timer driver commit

12.31. Various

GNSS receiver (e.g. a GPS receiver) subsystem commit, commit, commit, commit, commit

FPGA Device Feature List (DFL) Device 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

bus: add bus driver for accessing Allwinner A64 DE2 commit

cpufreq: armada-37xx: Add AVS support commit

cpufreq: exynos: Remove support for Exynos5440 commit

drivers/misc: Aspeed LPC snoop output using misc chardev commit

drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs commit

drivers: soc: Add LLCC driver commit

irqchip: add a SiFive PLIC driver commit

libnvdimm: Introduce locked DIMM capacity support commit

mailbox: Add support for i.MX messaging unit commit

mailbox: mediatek: Add Mediatek CMDQ driver commit

mailbox: ti-msgmgr: Add support for Secure Proxy commit

mei: expose fw version to sysfs commit

mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux commit

nvmem: Add Spreadtrum SC27XX efuse support commit

parport: parport_serial: Add WCH CH382L PCIe single parallel port support commit

phy: Renesas R-Car gen3 PCIe PHY driver commit

phy: bcm-sr-pcie: Add Stingray PCIe PHY driver commit

platform/mellanox: Introduce support for Mellanox register access driver commit

platform/mellanox: mlxreg-hotplug: Add hotplug hwmon uevent notification commit

ptp_qoriq: support automatic configuration for ptp timer commit

regmap: add SCCB support commit

remoteproc: qcom: Introduce Hexagon V5 based WCSS driver commit

reset: meson: add meson audio arb driver commit

reset: qcom: AOSS (always on subsystem) reset controller commit

reset: uniphier: add USB3 core reset control commit

slimbus: ngd: Add qcom SLIMBus NGD driver commit

slimbus: ngd: add stream support commit

soc: mediatek: pwrap: add mt6351 driver for mt6797 SoCs commit

soc: mediatek: pwrap: add pwrap driver for mt6797 SoCs commit

iommu Add config option to set passthrough as default commit Add sysfs attribyte for domain type commit Enable debugfs exposure of IOMMU driver internals commit



13. List of merges

14. Other news sites