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

• Pull m68k updates

• Pull debugobjects update

• Pull EFI updates

• Pull genirq updates

• Pull RCU updates

• Pull x86 RAS updates

• Pull scheduler updates

• Pull locking/atomics update

• Pull perf update

• Pull timer updates

• Pull x86 apic update

• Pull x86 boot updates

• Pull x86 asm updates

• Pull x86 build cleanup

• Pull x86 cleanups

• Pull x86 cpu updates

• Pull x86 dump printing cleanup

• Pull x86/hyper-v update

• Pull x86 cache QoS (RDT/CAR) updates

• Pull x86 platform updates

• Pull x86 mm updates

• Pull x86 vdso update

• Pull x86 PTI updates

• Pull x86 timer updates

• Pull s390 updates

• Pull ARM updates

• Pull ARM clkdev updates

• Pull parisc updates

• Pull MIPS updates

• Pull hwmon updates

• Pull vfs open-related updates

• Pull vfs icache updates

• Pull vfs lookup() updates

• Pull vfs aio updates

• Pull misc vfs updates

• Pull file locking updates

• Pull btrfs updates

• Pull fs iomap refactoring

• Pull cifs updates

• Pull ext4 updates

• Pull xfs updates

• Merge L1 Terminal Fault fixes

• Pull block updates

• Pull mtd updates

• Pull MD updates

• Pull dma-mapping updates

• Pull configfs updates

• Pull regmap updates

• Pull spi updates

• Pull regulator updates

• Pull pin control updates

• Pull Devicetree updates

• Pull LED updates

• Pull power management updates

• Pull ACPI updates

• Pull sound updates

• Pull documentation update

• Pull arm64 updates

• Pull xen updates

• Pull hardened usercopy updates

• Pull pstore update

• Pull security subsystem updates

• Pull SELinux updates

• Pull audit patches

• Pull printk updates

• Pull gcc plugin cleanups

• Pull Kbuild updates

• Pull Kconfig updates

• Pull Kconfig consolidation

• Pull networking updates

• Pull crypto updates

• Pull drm updates

• Pull media updates

• Pull auxdisplay updates

• Pull clang-format updates

• Pull random updates

• Pull EDAC updates

• Pull GPIO updates

• Pull clk updates

• Pull SCSI updates

• Pull gfs2 updates

• Pull smack updates

• Pull TPM updates

• Pull integrity updates

• Pull pci updates

• Pull mailbox updates

• Pull thermal management updates

• Pull VFIO updates

• Pull orangefs updates

• Pull UDF and ext2 update

• Pull fsnotify updates

• Pull device mapper updates

• Pull VLA removal leftovers

• Pull modules updates

• Pull powerpc updates

• Pull drm msm support for adreno a6xx

• Pull rdma updates

• Merge memory management updates from akpm

• Pull 9p updates

• Pull USB/PHY updates

• Pull tty/serial driver updates

• Pull staging and IIO updates

• Pull char/misc driver updates

• Pull driver core updates

• Pull MMC updates

• Pull DMAengine updates

• Pull watchdog updates

• Pull remoteproc updates

• Pull rpmsg updates

• Pull hwspinlock updates

• Pull input updates

• Pull RISC-V updates

• Pull first set of KVM updates

• Pull MFD updates

• Pull backlight updates

• Pull HID updates

• Pull livepatching updates

• Pull RTC updates

• Pull ceph updates

• Pull tracing updates

• Pull Kselftest update

• Pull ia64 NO_BOOTMEM conversion

• Pull arch/microblaze updates

• Pull chrome platform updates

• Pull core signal handling updates

• Pull i2c updates

• Pull power supply and reset updates

• Pull overlayfs updates

• Pull fuse update

• Pull arch/h8300 updates

• Pull sparc updates

• Pull IDE updates

• Pull more power management updates

• Pull more ACPI updates

• Merge more memory management updates from akpm

• Pull f2fs updates

• Pull more block updates

• Pull second set of KVM updates

• Pull Xtensa updates

• Pull more parisc updates

• Pull x86 platform driver updates

• Pull ARM 32-bit SoC platform updates

• Pull ARM SoC driver updates

• Pull ARM SoC defconfig updates

• Pull ARM device-tree updates

• Pull OpenRISC update

• Pull fbdev updates

• Pull pwm updates

• Pull UBI/UBIFS updates

• Pull nfsd updates

• Pull NFS client updates

• Merge yet more memory management updates from akpm

• Pull virtio updates

• Pull second i2c update

• Pull s390 updates

• Pull apparmor updates

• Pull thermal management updates

• Pull IOMMU updates

• Pull workqueue updates

• Pull cgroup updates

• Pull libata updates

• Pull more Kbuild updates

• Pull ARM SoC late updates

• Pull libnvdimm updates

• Pull libnvdimm memory-failure update

• Pull irq update

• Pull perf updates

• Pull IDA updates

• Pull timer update

14. Other news sites

• LWN's merge window, part 1, part 2

• Phoronix's The New & Improved Features Of The Linux 4.19 Kernel

• Heise.de (german): CPU-Vertrauensfrage und Meltdown-Schutz für 32-Bit-CPUs Update

• Linux 4.19: Performance goodies