Linux 5.14 was released on Sun, 29 Aug 2021.
Summary: This release includes a new system call to create secret memory areas that not even root can access, intended to be used to keep secrets safe; Core Scheduling, to allow safer use of SMT systems with CPU vulnerabilities; a burstable CFS controller via cgroups which allows bursty CPU-bound workloads to borrow a bit against their future quota; two new madvise(2) flags to improve performance in some situations; support for a Ext4 journal checkpoint ioctl that causes the journal blocks to be discarded or zero-filled for purposes of safety; a cgroup interface to kill all processes within that cgroup; initial steps towards signed BPF programs; and support for the next AMD and Intel GPUs chips. As always, there are many other features, new drivers, improvements and fixes.
Contents
-
Prominent features
- New memfd_secret(2) system call to create secret memory areas
- Improved AMD and Intel GPU support
- CFS burstable bandwith controller
- Core Scheduling, for safe hyperthreading
- Two new madvise(2) flags: MADV_POPULATE_READ and MADV_POPULATE_READ
- EXT4 journal checkpoint
- cgroup kill interface to kill all processes
- Initial steps towards BPF signed programs
- Core (various)
- File systems
- Memory management
- Block layer
- Tracing, perf and BPF
- Virtualization
- Security
- Networking
- Architectures
-
Drivers
- Graphics
- Power Management
- Storage
- Drivers in the Staging area
- Networking
- Audio
- Tablets, touch screens, keyboards, mouses
- TV tuners, webcams, video capturers
- Universal Serial Bus
- Serial Peripheral Interface (SPI)
- Watchdog
- Serial
- CPU Frequency scaling
- Voltage, current regulators, power capping, power supply
- Real Time Clock (RTC)
- Pin Controllers (pinctrl)
- Multi Media Card (MMC)
- Memory Technology Devices (MTD)
- Industrial I/O (iio)
- Multi Function Devices (MFD)
- Pulse-Width Modulation (PWM)
- Inter-Integrated Circuit (I2C + I3C)
- Hardware monitoring (hwmon)
- DMA engines
- Cryptography hardware acceleration
- PCI
- FRU Support Interface (FSI)
- Clock
- PHY ("physical layer" framework)
- EDAC (Error Detection And Correction)
- IOMMU
- Various
- List of Pull Requests
- Other news sites
1. Prominent features
1.1. New memfd_secret(2) system call to create secret memory areas
This release includes a new system call, memfd_secret(2), which allows to create a special memfd file descriptor whose contents will not be readable by any other process, not even root processes or the kernel itself; only the process that creates it can access it. This is intended to be used by programs that need to store some secret safely.
Recommended LWN article: memfd_secret() in 5.14
1.2. Improved AMD and Intel GPU support
This release adds preliminary support for future AMD and Intel graphics hardware, such as AMD Yellow Carp, AMD Beige Goby and Intel Alder Lake P.
1.3. CFS burstable bandwith controller
This release introduces the burstable CFS controller via cgroups, which allows bursty CPU-bound workloads to borrow a bit against their future quota to improve overall latencies & batching. Can be tweaked via /sys/fs/cgroup/cpu/<X>/cpu.cfs_burst_us.
Recommended LWN article: The burstable CFS bandwidth controller
1.4. Core Scheduling, for safe hyperthreading
Some of the recent CPU vulnerabilities allow to gather information from other processes being run in the same HyperTreading CPU. This release adds support for core scheduling, a feature that allows only trusted tasks to run concurrently on cpus sharing compute resources (like hyperthreads on a core). The goal is to mitigate the core-level side-channel attacks without requiring to disable SMT (which has a significant impact on performance in some situations).
Recommended LWN article: Core scheduling lands in 5.14
1.5. Two new madvise(2) flags: MADV_POPULATE_READ and MADV_POPULATE_READ
The madvise(2) system call lets applications hint the kernel about their behavior so that the kernel can optimize the management of memory resources. In this release, two new flags have been added: MADV_POPULATE_READ, which prefault page tables, just like manually reading each individual page would do, and without breaking any COW mappings; and MADV_POPULATE_WRITE, which can be used to preallocate backend memory and prefault page tables just like manually writing (or reading+writing) each individual page, break any COW mappings in the way. This lets some application (eg. emulators like QEMU) optimize some cases.
1.6. EXT4 journal checkpoint
This release includes a new ioctl for Ext4 file systems, EXT4_IOC_CHECKPOINT. When called, the journal ensures all transactions and their associated buffers are submitted to the disk. In-progress transactions are waited upon and included in the checkpoint. The EXT4_IOC_CHECKPOINT_FLAG_DISCARD and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT ioctl flags cause the journal blocks to be discarded or zero-filled, respectively, after the journal checkpoint is complete. The ioctl may be useful when snapshotting a system or for complying with content deletion SLOs.
1.7. cgroup kill interface to kill all processes
This release introduces the cgroup.kill file. It does what it says on the tin and allows a caller to kill a cgroup by writing "1" into cgroup.kill. The file is available in non-root cgroups.
1.8. Initial steps towards BPF signed programs
This release includes the first steps towards signed bpf programs. It uses new type of bpf program that is in charge of loading other BPF programs.
Recommended LWN article: Toward signed BPF programs
2. Core (various)
- Task scheduler
(FEATURED) Add support for core scheduling, a feature that allows only trusted tasks to run concurrently on cpus sharing compute resources (eg: hyperthreads on a core). The goal is to mitigate the core-level side-channel attacks without requiring to disable SMT (which has a significant impact on performance in some situations) commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
(FEATURED) Introduce the burstable CFS controller via cgroups, which allows bursty CPU-bound workloads to borrow a bit against their future quota to improve overall latencies & batching. Can be tweaked via /sys/fs/cgroup/cpu/<X>/cpu.cfs_burst_us commit
"Age" (decay) average idle time, to better track & improve workloads such as 'tbench' commit
Rework CPU capacity asymmetry detection commit, commit, commit
Add allowed CPU capacity knowledge to the Energy Aware Scheduler commit, commit
delayacct: Default disabled commit
mount: Support "nosymfollow" in new mount api commit, commit
procfs: allow reading /proc/<pid>/fdinfo/<fd> with PTRACE_MODE_READ commit, commit
- io_uring
Add IORING_REGISTER_IOWQ_AFF that allows an application to specificy CPU affinities for any IO threads that may get created to service request, and an IORING_UNREGISTER_IOWQ_AFF that simply resets the masks back to the default of per-node commit, commit
Reduce latency by reissueing the operation commit
- cgroup
seccomp: Add "atomic addfd + send reply" mode to SECCOMP_USER_NOTIF to better handle EINTR races visible to seccomp monitors commit, commit, commit, commit, commit
Build: Add build ID to stacktraces commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
futex: Provide FUTEX_LOCK_PI2, which is a variant that doesn't set FLAGS_CLOCKRT (i.e. uses CLOCK_MONOTONIC) commit, commit
kcsan: Add support for reporting observed value changes commit, commit, commit, commit, commit, commit, commit, commit, commit
locking/atomic: convert all architectures to ARCH_ATOMIC 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
- kunit
Remove the raw driver (obsoleted by Direct-IO) commit
jump_labels: variable sized jump_labels commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
bootconfig: Add mixed subkeys and value under the same key commit, commit, commit, commit, commit
tick/broadcast: Infrastructure to support per CPU "broadcast" devices for per CPU clockevent devices which stop in deep idle states. This allows us to utilize the more efficient architected timer on certain ARM SoCs for normal operation instead of permanentely using the slow to access SoC specific clockevent device commit, commit, commit, commit, commit
binfmt: remove support for em86 (alpha only) commit
3. File systems
- BTRFS
scrub: add sysfs knob to limit scrub IO bandwidth per device commit
Support cancellable resize and device delete ioctls commit, commit, commit, commit, commit, commit
Avoid unnecessary logging of xattrs during fast fsyncs (+17% throughput, -17% runtime on xattr stress workload) commit
Don't set the full sync flag when truncation does not touch extents (speeds up SQL workload) commit
Preemptive flushing improvements: adjust clamping logic on multi-threaded workloads to avoid flushing too soon; take into account global block reserve, may help on almost full filesystems; and continue flushing when there are enough pending delalloc and ordered bytes) commit, commit, commit, commit, commit, commit, commit
Make read time repair to be only submitted for each corrupted sector commit, commit, commit
Eliminate a deadlock when allocating system chunks and rework chunk allocation commit, commit
Add data write support for subpage commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Commit the transaction unconditionally for enospc commit, commit, commit, commit
Device stats are also available in /sys/fs/btrfs/FSID/devinfo/DEVID/error_stats commit
- XFS
- EXT4
- F2FS
Support RO feature commit
Show casefolding support only when supported commit
Advertise encrypted casefolding in sysfs commit
Add compress_inode mount option. It supports using address space of a filesystem managed inode to cache compressed block, in order to improve cache hit ratio of random read commit
Support migrating swapfile in aligned write mode commit
Add nocompress extensions support commit
- CIFS
- DLM
- FUSE
- NFS
- ORANGEFS
Readahead adjustment commit
- PSTORE
Mark pstore-blk as broken commit
- VBOXSF
- CEPH
Add IO size metrics support commit
4. Memory management
(FEATURED) Introduce memfd_secret system call to create "secret" memory areas commit, commit, commit, commit, commit, commit, commit
Bind the rlimit counters to a user in user namespace. Recommended LWN article. commit, commit, commit, commit, commit, commit, commit, commit, commit
kasan: add memory corruption identification support for hw tag-based kasan commit, commit, commit
(FEATURED) madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault page tables commit, commit, commit, commit, commit
Reduce kmemcache memory accounting overhead commit, commit, commit, commit
Allow high order pages to be stored on the per-cpu page allocator commit, commit
Use local_lock for pcp protection and reduce stat overhead commit, commit, commit, commit, commit, commit, commit, commit, commit
Calculate pcp->high based on zone sizes and active CPUs commit, commit, commit, commit, commit, commit
page_reporting: Make page reporting work on arm64 with 64KB page size commit, commit, commit, commit
Free idle swap cache page after COW commit
Free some vmemmap pages of HugeTLB page commit, commit, commit, commit, commit, commit, commit, commit, commit
Free some vmemmap pages of HugeTLB page that contain repeated information commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
memcg/slab: create a new set of kmalloc-cg-<n> caches commit, commit, commit
thp: use generic THP migration for NUMA hinting fault commit, commit, commit, commit, commit, commit, commit
Add support for SVM atomics in Nouveau commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
slub: move sysfs slab alloc/free interfaces to debugfs commit
percpu: memcg memory accounting rework commit, commit, commit
userfaultfd: add minor fault handling for shmem commit, commit, commit, commit, commit, commit, commit, commit, commit
Remove DISCONTIGMEM memory model commit, commit, commit, commit, commit, commit, commit, commit, commit
5. Block layer
cgroup: Improve I/O priority support by letting users configure a cgroup I/O priority policy in the blkio.prio.class attribute. Unlike ioprio_set(), this cgroup setting does affect writeback I/O priority. See also Documentation/admin-guide/cgroup-v2.rst commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
blkcg: prevent dirty inodes to pin dying memory cgroups commit, commit, commit, commit, commit, commit, commit, commit
bfq: preserve control, boost throughput commit, commit, commit, commit, commit, commit, commit
Charge loop device i/o to issuing cgroup commit, commit, commit
dm space maps: improve performance with inc/dec on ranges of blocks commit
dm btree: improve btree residency commit
dm: Improve zoned block device support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
dm writecache: add optional "metadata_only" parameter. When present: only metadata is promoted to the cache commit
dm writecache: make writeback pause configurable commit
md: io stats accounting commit, commit, commit, commit, commit, commit, commit, commit
md: raid5 lock contention optimization commit
block and nvme passthrough error handling commit, commit, commit, commit
6. Tracing, perf and BPF
- BPF
(FEATURED) syscall program, FD array, loader program, light skeleton commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
static linker: global symbols visibility commit, commit, commit, commit, commit, commit
libbpf: Add low level TC-BPF management API commit
libbpf: Add request buffer type for netlink messages commit
- perf
perf annotate: Add itrace options support commit
perf header: Support HYBRID_TOPOLOGY and HYBRID_CPU_PMU_CAPS commit, commit
perf parse-events: Add bison --file-prefix-map option commit
perf probe: Add --bootconfig to output definition in bootconfig format commit
perf record: Add a dummy event on hybrid systems to collect metadata records commit
perf script: Add API for filtering via dynamically loaded shared object commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
perf scripting python: Add insn, srcline and srccode commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
hwlat improvements and osnoise/timerlat tracers commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
tracing/boot: Add per-group/all events enablement commit
7. Virtualization
KVM statistics data fd-based binary interface commit, commit, commit, commit, commit, commit, commit
virtio_pci: Support surprise removal of virtio pci device commit
8. Security
ima: Add template fields to verify EVM portable signatures commit, commit, commit, commit, commit, commit, commit
evm: Improve usability of portable signatures commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
IMA: support for duplicate measurement records commit
9. Networking
- TCP
Implement SRv6 End.DT46 Behavior, defined in the IETF RFC 8986 along with SRv6 End.DT4 and End.DT6 Behaviors commit
xdp: extend xdp_redirect_map with broadcast support commit, commit, commit, commit
virtio/vsock: introduce SOCK_SEQPACKET support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Reset MAC header consistently across L3 virtual devices commit, commit, commit, commit, commit, commit
batman-adv: mcast: add MRD + routable IPv4 multicast with bridges support commit
can: introduce CANFD_FDF flag for mixed content in struct canfd_frame commit
- 802.11
devlink: rate objects API commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
inet_diag: add support for tw_mark commit
Add support for custom multipath hash policy for both IPv4 and IPv6 traffic. The new policy allows user space to control the outer and inner packet fields used for the hash computation commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
icmp: add support for extended RFC 8335 PROBE (ping) commit
- Multi Path TCP
Data checksum support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Add timestamp support commit, commit, commit, commit, commit, commit, commit
Restrict values of 'enabled' sysctl commit
Support SYSCTL only if enabled commit
Socket migration for SO_REUSEPORT when a process using it is dying. See this recommended LWN article. commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
bridge: split IPv4/v6 mc router state and export for batman-adv commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Add the 25G BASE-R mode to the set modes supported commit, commit, commit, commit
Retrieve netns cookie via getsocketopt commit
Allow bypass of the lockless qdisc to improving performance (for pktgen: +23% with one thread, +44% with 2 threads) commit, commit, commit
- netfilter
Add nfnetlink_hook subsystem to fetch the netfilter hook pipeline configuration. This also includes a new field to annotate the hook type as metadata commit, commit, commit, commit, commit, commit
Expose TCP and UDP flowtable offload timeouts through sysctl commit, commit
conntrack: add new sysctl to disable RST check commit
nf_tables: add last expression commit
Support for SCTP chunks matching on nf_tables commit
nft_nat: allow to specify layer 4 protocol NAT only commit
sctp: implement RFC8899: Packetization Layer Path MTU Discovery for SCTP transport commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- ncsi
smc: Add SMC statistic support commit, commit, commit, commit
Bluetooth: Increment management interface revision commit
- SUNRPC
Allow for offlining/removing xprt via sysfs commit, commit, commit, commit, commit, commit, commit, commit
Create sysfs files for chaning the IP address commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Allow for offlining/removing xprt via sysfs commit, commit, commit, commit, commit, commit, commit, commit, commit
- WWAN
Add WWAN link creation support commit, commit, commit, commit
link creation improvements commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
subsystem improvements commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Add WWAN device index sysfs attribute commit
Add WWAN port type attribute commit
10. Architectures
10.1. X86
Improve Minimum Alternate Stack Size commit, commit, commit, commit, commit, commit
- platform
surface: aggregator: Extend user-space interface for events commit, commit, commit, commit, commit, commit, commit
Add intel_skl_int3472 driver commit
amd-pmc: Add new acpi id for future PMC controllers commit
amd-pmc: Add support for ACPI ID AMDI0006 commit
amd-pmc: Add support for logging SMU metrics commit
amd-pmc: Add support for logging s0ix counters commit
dell-privacy: Add support for Dell hardware privacy commit
gigabyte-wmi: add support for B450M S2H V2 commit
gigabyte-wmi: add support for B550 Aorus Elite V2 commit
gigabyte-wmi: add support for X570 GAMING X commit
intel-hid: add Alder Lake ACPI device ID commit
think-lmi: Add WMI interface support on Lenovo platforms commit
think-lmi: Add pending_reboot support commit
thinkpad_acpi: Add X1 Carbon Gen 9 second fan support commit
touchscreen_dmi: Add info for the Goodix GT912 panel of TM800A550L tablets commit
Enable Clang LTO for 32-bit as well commit
perf/x86/cstate: Add ICELAKE_X and ICELAKE_D support commit
split lock detection: Add "ratelimit:N" parameter to the split_lock_detect= boot option, to rate-limit the generation of bus-lock exceptions commit, commit, commit
- KVM
Allow userspace to handle emulation errors (unknown instructions) commit
SVM: add module param to control the #SMI interception commit
Support write protecting only large pages commit
Add support for XMM fast hypercalls commit, commit, commit, commit
Hyper-V nested virt enlightenments for SVM commit, commit, commit, commit, commit, commit, commit
hyper-v: Fine-grained access check to Hyper-V hypercalls and MSRs 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
Introduce KVM_{GET|SET}_SREGS2 commit, commit, commit, commit, commit, commit, commit, commit
Implement nested TSC scaling commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
nVMX: nSVM: Add more statistics to KVM debugfs commit
- perf
Enable I/O stacks to IIO PMON mapping on SNR and ICX commit, commit, commit
perf stat: Add Topdown metrics L2 events as default events commit
perf stat: Enable BPF counters with --for-each-cgroup commit, commit, commit
perf top: Add cgroup support for perf top (-G) commit
perf scripting python: Improve general scripting for Intel PT commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
perf intel-pt: Add more support for VMs commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Support perf-mem/perf-c2c for AlderLake commit, commit, commit, commit, commit, commit, commit, commit
perf vendor events intel: Add core event list for Icelake Server commit
perf vendor events intel: Add uncore event list for Icelake Server commit
perf vendor events intel: Update event list for Icelake Client commit
perf vendor events power10: Adds 24x7 nest metric events for power10 platform commit
perf x86 kvm-stat: Support to analyze kvm MSR commit
10.2. ARM
- Device Tree Sources
Raspberry Pi 400 commit
Rockchip: RK3568 SoC and EVB, video codecs for rk3036/3066/3188/322x commit, commit
Qualcomm: SA8155p Automotive platform (SM8150 derivative), SM8150/8250 enhancements and support for Sony Xperia 1/1II and 5/5II commit, commit, commit
Qualcomm: New support for Microsoft Surface Duo (SM8150-based), Huawei Ascend G7 commit, commit
Allwinner: More device bindings for V3s, Forlinx OKA40i-C and NanoPi R1S H5 boards commit, commit
MediaTek: More device bindings for mt8167, new Chromebook system variants for mt8183 commit, commit, commit, commit, commit
Amlogic: BananaPi BPI-M5 board added commit
Support for GE B1x5v2 and B1x5Pv2 commit
Add intel-ixp42x-welltech-epbx100 commit
imx28: Add DTS description of imx28 based XEA board commit
imx: Add i.mx6q DaSheng COM-9XX SBC board support commit
qcom: Add board support for HK10 commit
qcom: sc7180: Add pompom rev3 commit
qcom: sc7180: Add CoachZ rev3 commit
ti: k3-am65: Add support for UHS-I modes in MMCSD1 subsystem commit
qcom: pmm8155au_2: Add base dts file commit
qcom: pmm8155au_1: Add base dts file commit
imx: Add i.mx8mm Gateworks gw7901 dts support commit, commit
tegra: pmc: Add core power domain commit
tegra: pmc: Add driver state syncing commit
tegra: regulators: Support core domain state syncing commit
qcom: rpmhpd: Add SC8180X commit
qcom: rpmpd: Add MDM9607 RPM Power Domains commit
qcom: socinfo: Add more IDs commit
ARM: imx: add smp support for imx7d commit
- ARM64
Allow Pointer Authentication to be configured independently for kernel and userspace commit, commit
firmware: Add initial support for Arm FF-A commit, commit, commit, commit, commit, commit
Prepare instruction decoder for objtool commit, commit, commit, commit, commit, commit, commit
String function updates commit, commit, commit, commit, commit, commit, commit, commit
perf: Add more support on caps under sysfs commit
kasan: support specialized outlined tag mismatch checks commit
MTE support for KVM guest commit, commit, commit, commit, commit, commit
10.3. POWERPC
sstep: Add emulation support and tests for 'setb' instruction commit
Optimise KUAP on book3s/32commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
8xx: Allow disabling KUAP at boot time commit
44x: Implement Kernel Userspace Exec Protection (KUEP) commit
Enable VAS and NX-GZIP support on PowerVM commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Further Strict RWX support commit, commit, commit, commit, commit, commit, commit, commit, commit
Add support for Microwatt soft-core commit, commit, commit, commit, commit, commit, commit, commit, commit
Fast interrupt exits commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
papr_scm: Add support for reporting dirty-shutdown-count commit
xmon: Add support for running a command on all cpus in xmon commit
Implement huge VMAP and VMALLOC on powerpc 8xx commit, commit, commit, commit, commit
Book3S: C-ify the P9 entry/exit code 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 for H_RPT_INVALIDATE in PowerPC KVM commit, commit, commit, commit, commit, commit
10.4. RISCV
mremap speedup commit
Add mem kernel parameter support commit
Enable KFENCE for riscv64 commit
Add VMAP_STACK overflow detection commit
10.5. S390
AP: support new dynamic AP bus size limit commit
ap/zcrypt: notify userspace with online, config and mode info commit
cpumf: Allow concurrent access for CPU Measurement Counter Facility commit
vdso: add minimal compat vdso commit
boot: add zstd support commit
KVM: stats: Support binary stats retrieval for a VCPU commit
10.6. UML
PCI support. It communicates with the outside (of UML) with virtio, which we previously added using vhost-user, and then offers a PCI bus to the inside system, where normal PCI probing etc. happens, but all config space & IO accesses are forwarded over virtio commit, commit, commit, commit, commit, commit, commit, commit, commit
Allow not setting extra rpaths in the linux binary commit
Add support for host CPU flags and alignment commit, commit, commit
10.7. M68K
Replace macide driver with generic platform drivers commit
Replace q40ide driver with pata_falcon and falconide commit
10.8. MIPS
ath79: ar9331: Add OpeneEmbed SOM9331 Board commit
11. Drivers
11.1. Graphics
Add simpledrm driver, a DRM driver for simple-framebuffer framebuffers as provided by the kernel's boot code. This driver enables basic graphical output on many different graphics devices that are provided by the platform (e.g., EFI, VESA, embedded framebuffers) commit
Mark AGP ioctls as legacy commit
HDMI infoframe signal colorimetry support commit, commit, commit
- Remove DRM_KMS_FB_HELPER config option
- 16bpc fixed point format fourcc
- Intel
- XeLPD Display IP preperation work
- (FEATURED) ADL-P enablement patches
- Disable mmap ioctl for discerte GPUs
- Start enabling HuC loading for Gen12+
- Initial TTM support for Discrete GPUs
- ADL-S PCI ID update
Initial LMEM support for DG1 commit, commit, commit, commit, commit, commit, commit, commit, commit
- amdgpu
- Aldebaran updates + initial SR-IOV
(FEATURED) New GPU: Beige Goby support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
(FEATURED) New GPU: Yellow Carp support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
PCIe ASPM support commit
Renoir TMZ enablement commit
- Initial multiple eDP panel support
Use fdinfo to track devices/process info commit
16bpc fixed point format support commit
New INFO query for additional vbios info commit
- amdkfd
SR-IOV aldebaran support commit
Add HMM-based SVM memory manager 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
Add debugfs entry for dsc passthrough commit
Add debugfs node to read private buffer commit
Add a new device ID for Aldebaran commit
Add DID for beige goby commit
Add another Renoir DID commit
Add new dimgrey cavefish DID commit
Add sysfs counters for vm fault and migration commit, commit
- vmwgfx
- msm
devcoredump support for display errors commit, commit, commit, commit, commit, commit, commit
mdp5: alpha/blend_mode/zpos support commit
a6xx: cached coherent buffer support commit, commit, commit, commit, commit
gpu iova fault improvement commit, commit, commit, commit, commit
Add support for Adreno 660 GPU commit
Add debugfs to trigger shrinker commit
- mediatek
- bochs
Add screen blanking support commit
- etnaviv
- imx
Add color properties commit
- panfrost
- vkms
ttm: Provide tt_shrink file via debugfs commit
- panel
- hyperv
Add new DRM driver for HyperV graphics commit
- bridge:
backlight: rt4831: Adds support for Richtek RT4831 backlight commit
11.2. Power Management
- ACPI
- thermal
11.3. Storage
Remove legacy IDE driver (obsoleted by libata drivers) commit, commit, commit, commit, commit
ahci: Add support for Dell S140 and later controllers commit
nvmet: add ZBD backened support commit, commit, commit, commit, commit
- scsi
efct: Broadcom (Emulex) FC Target driver 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
nvme: Added a new sysfs attribute appid_store commit
qedf: Add vendor identifier attribute commit
qla2xxx: Add heartbeat check commit
11.4. Drivers in the Staging area
spmi: hisi-spmi-controller: move driver from staging commit
phy: phy-hi3670-usb3: move driver from staging into phy commit
fbtft: Add support for orientation on Himax HX8347d commit
android: ashmem: add size field in procfs fdinfo commit
media: hantro: add initial SAMA5D4 support commit
media: imx: imx7_mipi_csis: Add i.MX8MM support commit
media: sp8870: move it to staging commit
media: av7110: move driver to staging commit
Add support for older Rockchip SoCs to V4L2 hantro and rkvdec drivers commit, commit, commit, commit, commit, commit
Add HANTRO G2/HEVC decoder support for IMX8MQ commit, commit, commit, commit, commit, commit, commit, commit, commit
Drop kpc2000 driver commit
11.5. Networking
Add Mellanox BlueField Gigabit Ethernet driver commit
- Bluetooth
btusb: Add support for Lite-On Mediatek Chip commit
Enable Bluetooth functionality for WCN6750 commit, commit, commit, commit, commit
btbcm: Add entry for BCM43430B0 UART Bluetooth commit
btusb: Add 0x0b05:0x190e Realtek 8761BU (ASUS BT500) device commit
btusb: Add a new QCA_ROME device (0cf3:e500) commit
RDMA/hns: Support getting max QP number from firmware commit
RDMA/irdma: Add Intel Ethernet Protocol Driver for RDMA commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- RDMA/mlx5
RDMA/mlx5: Support real-time timestamp directly from the device commit
RDMA/rxe: Implement memory windows commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- ath11k
- atl1c
bnxt_en: Add hardware PTP timestamping support on 575XX devices commit, commit, commit, commit, commit, commit, commit
brcmfmac: support parse country code map from DT commit
can: c_can: add ethtool support commit
dpaa2-mac: Add ACPI support for DPAA2 MAC driver commit
- dsa
Provide cable test support for the ksz886x switch commit, commit, commit, commit, commit, commit, commit, commit
mv88e6xxx: enable SerDes PCS register dump via ethtool -d on Topaz commit
mv88e6xxx: enable SerDes RX stats for Topaz commit
qca8k: Multiple improvement to qca8k stability 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
Add NXP SJA1110 support to the sja1105 DSA driver commit, commit, commit, commit, commit, commit, commit
DSA tagging driver for NXP SJA1110 commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
fsl/fman: Add fibre support commit
gianfar: Implement rx_missed_errors counter commit
gve: Introduce DQO descriptor format commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- hns3
Add VLAN filter control support commit, commit, commit, commit, commit, commit, commit, commit
Add RAS compatibility adaptation solution commit, commit, commit, commit, commit
Add support for FD counter in debugfs commit
Add support for dumping MAC umv counter in debugfs commit
Remove the useless debugfs file node cmd commit
Add support for a new RXD advanced layout commit
- ice
- igc
iosm: PCIe Driver for Intel M.2 Modem commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- ipa
- iwlwifi:
- marvell
mdio: Add ACPI support code for mdio commit
- mlx5/mlx5e
mt7601u: add USB device ID for some versions of XiaoDu WiFi Dongle commit
- mt76
mt7615: add thermal sensor device support commit
mt7663: enable hw rx header translation commit
mt7915: add MSI support commit
mt7915: add support for tx status reporting commit
mt7915: add thermal sensor device support commit
mt7921: add back connection monitor support commit
mt7921: enable HE BFee capability commit
mt7921: enable hw offloading for wep keys commit
mt7921: enable random mac address during sched_scan commit
mt7921: enable runtime pm by default commit
mt7921: limit txpower according to userlevel power commit
mvpp2: ACPI MDIO support for Marvell controllers commit, commit, commit, commit, commit, commit
nfp: Introduce conntrack offloading to the nfp driver commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- octeontx2-af
pcs: add 2500BASEX support for Intel mGbE controller commit
Port the SJA1105 DSA driver to XPCS commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- phy
dsa micrel/ksz886x add MDI-X support commit
Add MediaTek Gigabit Ethernet PHY driver commit
Add driver for Motorcomm yt8511 phy commit
Add support for qca8k switch internal PHY in at803x commit
micrel: ksz8081 add MDI-X support commit
micrel: ksz886x/ksz8081: add cabletest support commit
nxp-c45-tja11xx: add timestamping support commit
Add 25G BASE-R support commit
r8152: support pauseparam of ethtool_ops commit
Remove the caif_hsi driver commit
rsi: Add support for changing beacon interval commit
- rtw88
sfp: add support for 25G BASE-R SFPs commit
- sparx5
- stmmac
usb/phy: asix: add support for ax88772A/C PHYs commit, commit
wcn36xx: Enable downstream consistent Wake on Lan commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
mac80211_hwsim: add concurrent channels scanning support over virtio commit
11.6. Audio
Add Scarlett Gen 3 support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
bebob: add support for ToneWeal FW66 commit
- firewire
- hda
realtek: Add another ALC236 variant support commit
intel-dsp-cfg: add missing ElkhartLake PCI ID commit
oxfw: add explicit device entry for Loud Technologies Mackie Onyx Sattelite commit
oxfw: add explicit device entry for Loud Technologies Tapco Link.FireWire 4x6 commit
rawmidi: Add framing mode commit
usb-audio: Add support for Denon DN-X1600 commit
- ASoC
Add Rockchip rk817 audio CODEC support commit
Intel: Boards: tgl_max98373: Add BT offload support commit
Intel: add sof-cs42l42 machine driver commit
Intel: boards: add support for adl boards in sof-rt5682 commit
Intel: sof_rt5682: Enable Bluetooth offload on tgl and adl commit
Intel: sof_sdw: add support for Bluetooth offload commit
Intel: sof_sdw: remove hdac-hdmi support commit
SOF: Intel: pci-tgl: add ADL-M support commit
codecs: Add driver for NXP/Goodix TFA989x (TFA1) amplifiers commit
codecs: tfa989x: Add support for tfa9897 commit
codecs: wcd-clsh: add new version support commit
ASoC: codecs: add wcd938x support commit, commit, commit, commit, commit, commit, commit
codecs: wcd934x: add Headset and button detection support commit, commit, commit, commit
cs42l42: Add support for 2304000 Bit clock commit and support for 2400000 Bit clock commit
fsl_spdif: add support for enabling raw capture mode commit
imx-card: Add imx-card machine driver commit
meson: g12a-toacodec: add support for SM1 TOACODEC commit
qcom: Add four speaker support on MI2S secondary commit
qdsp6: Add Quinary MI2S ports support commit, commit, commit, commit
rsnd: add debugfs support commit
rsnd: add null CLOCKIN support commit
rt711: add two jack detection modes commit
tlv320aic32x4: add support for TAS2505 commit, commit, commit
topology: Add support for multiple kcontrol types to a widget commit
11.7. Tablets, touch screens, keyboards, mouses
resistive-adc-touch: add support for z1 and z2 channels commit
edt-ft5x06: add support for iovcc-supply commit
pm8941-pwrkey: add support for PMK8350 PON_HLOS PMIC peripheral commit
- HID
input: Add support for Programmable Buttons commit
apple: Add support for Keychron K1 wireless keyboard commit
amd_sfh: Add initial support for HPD sensor commit
amd_sfh: Extend ALS support for newer AMD platform commit
amd_sfh: Extend driver capabilities for multi-generation support commit
lg-g15: Add support for the Logitech Z-10 speakers commit
11.8. TV tuners, webcams, video capturers
Add HANTRO G2/HEVC decoder support for IMX8MQ commit, commit, commit, commit, commit, commit, commit, commit, commit
MPEG-2 stateless API cleanup and destaging commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
atmel: atmel-isc-base: add support for more formats and additional pipeline modules commit
imx208: Add imx208 camera sensor driver commit
mtk-vcodec: Add MT8192 H264 venc driver commit
mtk-vcodec: Support MT8192 H264 4K encoding commit
ov8856: Add support for 2 data lanes commit
ov8856: add vflip/hflip control support commit
rcar-csi2: Add support for Y10 and Y8 commit
rc: add keymap for Toshiba CT-90405 remote commit
rc: remove tango ir driver and keymap commit
11.9. Universal Serial Bus
cdc-wdm: WWAN framework integration commit
gadget: f_uac2/u_audio: add feedback endpoint support commit
gadget: f_uac2: add adaptive sync support for capture commit
gadget: u_audio: add real feedback implementation commit
isp1760: add support for isp1763 commit
isp1763: add peripheral mode commit
- serial
xhci-mtk: allow multiple Start-Split in a microframe commit
- Thunderbolt
11.10. Serial Peripheral Interface (SPI)
add of_device_uevent_modalias support commit
hisi-kunpeng: Add debugfs support commit
spi-mem: add automatic poll status functions commit
stm32-qspi: add automatic poll status feature commit
11.11. Watchdog
Add hrtimer-based pretimeout feature commit
sbsa: Support architecture version 1 commit
hpwdt: New PCI IDs commit
sama5d4_wdt: add support for sama7g5-wdt commit
Add Mstar MSC313e WDT driver commit
Remove MV64x60 watchdog driver commit
11.12. Serial
fsl_lpuart: add loopback support commit
liteuart: Add support for earlycon commit
sh-sci: Add support for RZ/G2L SoC commit
Add Option International GSM-Ready 56K/ISDN modem commit
11.13. CPU Frequency scaling
mediatek: add support for mt8365 commit
cppc: Add support for frequency invariance commit, commit, commit, commit
intel_pstate: HWP support on hybrid processors commit, commit
intel_pstate: Add Icelake servers support in no-HWP mode commit
intel_pstate: Add Cometlake support in no-HWP mode commit
11.14. Voltage, current regulators, power capping, power supply
- power
- regulator
bd70528: Drop BD70528 support commit
bd9576: Support error reporting commit
fan53555: add tcs4526 commit
max8893: add regulator driver commit
mt6359: Add support for MT6359 regulator commit
mt6359: Add support for MT6359P regulator commit
qcom-rpmh: Add new regulator found on SA8155p adp board commit
rt6160: Add support for Richtek RT6160 commit
rt6245: Add support for Richtek RT6245 commit
sy7636a: Initial commit commit
11.15. Real Time Clock (RTC)
m41t80: add support for fixed clock commit
imxdi: add wakeup support commit
bd70528: Drop BD70528 support commit
11.16. Pin Controllers (pinctrl)
tigerlake: Add Alder Lake-M ACPI ID commit
amd: Add device HID for new AMD GPIO controller commit
mediatek: add support for mt8365 SoC commit
qcom: pinctrl: Add pinctrl driver for sm6125 commit
11.17. Multi Media Card (MMC)
Add support for cache ctrl for SD cards commit
Initital support for new power/perf features for SD cards commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
Add support for disabling HS400 mode via DT commit
sdhci-iproc: Add support for the legacy sdhci controller on the BCM7211 commit
JZ4740: Add support for JZ4775 commit
11.18. Memory Technology Devices (MTD)
Add OTP nvmem provider support commit
rawnand: NV-DDR support commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
rawnand: omap: Add larger page NAND chips support commit
rawnand: pl353: Add support for the ARM PL353 SMC NAND controller commit
spi-nor: enable locking support for MX25L12805D commit
spi-nor: intel-spi: Add support for Intel Alder Lake-M SPI serial flash commit
spinand: macronix: Add support for serial NAND flash commit
11.19. Industrial I/O (iio)
accel: Add driver for Murata SCA3300 accelerometer commit
accel: add support for FXLS8962AF/FXLS8964AF accelerometers commit
accel: bmc150: Add support for yoga's with dual accelerometers with an ACPI HID of DUAL250E commit, commit, commit, commit, commit, commit, commit, commit, commit
accel: bmc150: Add device IDs for BMA253 commit
accel: kxcjk-1013: Add support for KX023-1025 commit
adc: ad7298: Enable on Intel Galileo Gen 1 commit
adc: add ADC driver for the TI TSC2046 controller commit
afe: iio-rescale: Support processed channels commit
light: Added AMS tsl2591 driver implementation commit
sps30: add support for serial interface commit
sps30: separate core and interface specific code commit
st_sensors: Add lsm9ds0 IMU support commit
temperature: add driver support for ti tmp117 commit
11.20. Multi Function Devices (MFD)
Add Rockchip rk817 audio CODEC support commit
intel-lpss: Add Intel Alder Lake-M PCI IDs commit
pm8008: Add driver for QCOM PM8008 PMIC commit
rt4831: Adds support for Richtek RT4831 commit
tps68470: Remove tps68470 MFD driver commit
11.21. Pulse-Width Modulation (PWM)
pca9685: Support new usage_power setting in PWM state commit
11.22. Inter-Integrated Circuit (I2C + I3C)
11.23. Hardware monitoring (hwmon)
pmbus: Add support for reading direct mode coefficients commit
pmbus/zl6100: Add support for ZLS1003, ZLS4009 and ZL8802 commit
adm1275: enable adm1272 temperature reporting commit
Add sht4x Temperature and Humidity Sensor Driver commit
pmbus/pim4328: Add PMBus driver for PIM4006, PIM4328 and PIM4820 commit
pmbus: Add support for MPS Multi-phase mp2888 controller commit
pmbus: Add driver for Delta DPS-920AB PSU commit
11.24. DMA engines
qcom: gpi: Add SM8250 compatible commit
11.25. Cryptography hardware acceleration
hisilicon: supports to configure function's QoS for ACC commit, commit, commit, commit, commit, commit, commit, commit
hisilicon/qm: add MSI detection steps on Kunpeng930 commit
hisilicon/qm: implement for querying hardware tasks status commit
hisilicon/sec: supports new aeads for new hardware commit, commit, commit, commit
hisilicon: supports new skciphers for new hardware commit, commit, commit
hisilicon: add new type of sqe for Kunpeng930 commit, commit
nx: Add sysfs interface to export NX capabilities commit
octeontx2 - Add mailbox support for CN10K commit
octeontx2 - add support for CPT operations on CN10K commit
octeontx2 - add support to map LMTST region for CN10K commit
sl3516 - Add sl3516 crypto engine commit
11.26. PCI
ixp4xx: Add a new driver for IXP4xx commit
iproc: Support multi-MSI only on uniprocessor kernel commit
Add sysfs "removable" attribute commit
11.27. FRU Support Interface (FSI)
Aspeed: Reduce poll timeout commit
11.28. Clock
Add support for the lmk04832 commit
agilex/stratix10: add support for the 2nd bypass commit
hisilicon: Add clock driver for hi3559A SoC commit
imx: scu: add gpr clocks support commit
ingenic: Add support for the JZ4760 commit
lmk04832: add support for digital delay commit
clk: qcom: Add camera clock controller driver for SM8250 commit, commit, commit
qcom: Add MDM9607 GCC driver commit
qcom: clk-rcg2: Add support for duty-cycle for RCG commit
qcom: dispcc-sm8250: Add EDP clocks commit
renesas: Add CPG core wrapper for RZ/G2L SoC commit
renesas: r9a07g044: Add P2 Clock support commit
renesas: rcar-gen3: Add boost support to Z clocks commit
renesas: rcar-gen3: Increase Z clock accuracy commit
renesas: rzg2l: Add multi clock PM support commit
si5341: Add sysfs properties to allow checking/resetting device faults commit
stm32mp1: new compatible for secure RCC support commit
ti: add am33xx/am43xx spread spectrum clock support commit
11.29. PHY ("physical layer" framework)
qcom-qusb2: Add configuration for SM4250 and SM6115 commit
qcom-qmp: Add support for SDX55 QMP PCIe PHY commit
phy-rockchip-inno-usb2: add support for RK3308 USB phy commit
phy-can-transceiver: Add support for generic CAN transceiver driver commit
rockchip: add Innosilicon-based CSI dphy commit
11.30. EDAC (Error Detection And Correction)
i10nm: Add detection of memory levels for ICX/SPR servers commit
i10nm: Add support for high bandwidth memory commit
igen6: Add Intel Alder Lake SoC support commit
igen6: Add Intel ICL-NNPI SoC support commit
igen6: Add Intel Tiger Lake SoC support commit
skx_common: Add new ADXL components for 2-level memory commit
11.31. IOMMU
amd: Add amd_iommu=force_enable option commit
Add support for ACPI VIOT commit, commit, commit, commit, commit
vt-d: Expose latency monitor data through debugfs commit
vt-d: Support asynchronous IOMMU nested capabilities commit
rockchip: Add support for iommu v2 commit
11.32. Various
xillybus: Add driver for XillyUSB (Xillybus variant for USB) commit
counter: Add support for Intel Quadrature Encoder Peripheral commit
- cxl
firmware: Add initial support for Arm FF-A commit, commit, commit, commit, commit
reset: mchp: sparx5: add switch reset driver commit
reset: stm32mp1: remove stm32mp1 reset commit
hwspinlock: add sun6i hardware spinlock support commit
interconnect: qcom: Add SC7280 interconnect provider driver commit
ipmi: Allow raw access to KCS devices commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
- mailbox
mbox: add polarfire soc system controller mailbox commit
misc: eeprom_93xx46: Add new 93c56 and 93c66 compatible strings commit
mxser: drop ISA support commit
nvmem: Add support for FRAM commit
ptp: support virtual clocks and timestamping commit, commit, commit, commit, commit, commit, commit, commit, commit, commit, commit
pwm: core: Support new usage_power setting in PWM state commit
- regmap
- remoteproc
w1: ds2438: adding support for calibration of current measurements commit, commit, commit, commit, commit, commit
uio: uio_pci_generic: add memory resource mappings commit
12. List of Pull Requests
13. Other news sites
LWN's merge window part 1, part 2
Phoronix Feature list