Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 231 insertions, 0 deletions

diff --git a/Documentation/powerpc/elf_hwcaps.rst b/Documentation/powerpc/elf_hwcaps.rst
new file mode 100644
index 000000000..3366e5b18
--- /dev/null
+++ b/Documentation/powerpc/elf_hwcaps.rst
@@ -0,0 +1,231 @@
+.. _elf_hwcaps_powerpc:
+
+==================
+POWERPC ELF HWCAPs
+==================
+
+This document describes the usage and semantics of the powerpc ELF HWCAPs.
+
+
+1. Introduction
+---------------
+
+Some hardware or software features are only available on some CPU
+implementations, and/or with certain kernel configurations, but have no other
+discovery mechanism available to userspace code. The kernel exposes the
+presence of these features to userspace through a set of flags called HWCAPs,
+exposed in the auxiliary vector.
+
+Userspace software can test for features by acquiring the AT_HWCAP or
+AT_HWCAP2 entry of the auxiliary vector, and testing whether the relevant
+flags are set, e.g.::
+
+	bool floating_point_is_present(void)
+	{
+		unsigned long HWCAPs = getauxval(AT_HWCAP);
+		if (HWCAPs & PPC_FEATURE_HAS_FPU)
+			return true;
+
+		return false;
+	}
+
+Where software relies on a feature described by a HWCAP, it should check the
+relevant HWCAP flag to verify that the feature is present before attempting to
+make use of the feature.
+
+HWCAP is the preferred method to test for the presence of a feature rather
+than probing through other means, which may not be reliable or may cause
+unpredictable behaviour.
+
+Software that targets a particular platform does not necessarily have to
+test for required or implied features. For example if the program requires
+FPU, VMX, VSX, it is not necessary to test those HWCAPs, and it may be
+impossible to do so if the compiler generates code requiring those features.
+
+2. Facilities
+-------------
+
+The Power ISA uses the term "facility" to describe a class of instructions,
+registers, interrupts, etc. The presence or absence of a facility indicates
+whether this class is available to be used, but the specifics depend on the
+ISA version. For example, if the VSX facility is available, the VSX
+instructions that can be used differ between the v3.0B and v3.1B ISA
+versions.
+
+3. Categories
+-------------
+
+The Power ISA before v3.0 uses the term "category" to describe certain
+classes of instructions and operating modes which may be optional or
+mutually exclusive, the exact meaning of the HWCAP flag may depend on
+context, e.g., the presence of the BOOKE feature implies that the server
+category is not implemented.
+
+4. HWCAP allocation
+-------------------
+
+HWCAPs are allocated as described in Power Architecture 64-Bit ELF V2 ABI
+Specification (which will be reflected in the kernel's uapi headers).
+
+5. The HWCAPs exposed in AT_HWCAP
+---------------------------------
+
+PPC_FEATURE_32
+    32-bit CPU
+
+PPC_FEATURE_64
+    64-bit CPU (userspace may be running in 32-bit mode).
+
+PPC_FEATURE_601_INSTR
+    The processor is PowerPC 601.
+    Unused in the kernel since f0ed73f3fa2c ("powerpc: Remove PowerPC 601")
+
+PPC_FEATURE_HAS_ALTIVEC
+    Vector (aka Altivec, VMX) facility is available.
+
+PPC_FEATURE_HAS_FPU
+    Floating point facility is available.
+
+PPC_FEATURE_HAS_MMU
+    Memory management unit is present and enabled.
+
+PPC_FEATURE_HAS_4xxMAC
+    The processor is 40x or 44x family.
+
+PPC_FEATURE_UNIFIED_CACHE
+    The processor has a unified L1 cache for instructions and data, as
+    found in NXP e200.
+    Unused in the kernel since 39c8bf2b3cc1 ("powerpc: Retire e200 core (mpc555x processor)")
+
+PPC_FEATURE_HAS_SPE
+    Signal Processing Engine facility is available.
+
+PPC_FEATURE_HAS_EFP_SINGLE
+    Embedded Floating Point single precision operations are available.
+
+PPC_FEATURE_HAS_EFP_DOUBLE
+    Embedded Floating Point double precision operations are available.
+
+PPC_FEATURE_NO_TB
+    The timebase facility (mftb instruction) is not available.
+    This is a 601 specific HWCAP, so if it is known that the processor
+    running is not a 601, via other HWCAPs or other means, it is not
+    required to test this bit before using the timebase.
+    Unused in the kernel since f0ed73f3fa2c ("powerpc: Remove PowerPC 601")
+
+PPC_FEATURE_POWER4
+    The processor is POWER4 or PPC970/FX/MP.
+    POWER4 support dropped from the kernel since 471d7ff8b51b ("powerpc/64s: Remove POWER4 support")
+
+PPC_FEATURE_POWER5
+    The processor is POWER5.
+
+PPC_FEATURE_POWER5_PLUS
+    The processor is POWER5+.
+
+PPC_FEATURE_CELL
+    The processor is Cell.
+
+PPC_FEATURE_BOOKE
+    The processor implements the embedded category ("BookE") architecture.
+
+PPC_FEATURE_SMT
+    The processor implements SMT.
+
+PPC_FEATURE_ICACHE_SNOOP
+    The processor icache is coherent with the dcache, and instruction storage
+    can be made consistent with data storage for the purpose of executing
+    instructions with the sequence (as described in, e.g., POWER9 Processor
+    User's Manual, 4.6.2.2 Instruction Cache Block Invalidate (icbi))::
+
+        sync
+        icbi (to any address)
+        isync
+
+PPC_FEATURE_ARCH_2_05
+    The processor supports the v2.05 userlevel architecture. Processors
+    supporting later architectures DO NOT set this feature.
+
+PPC_FEATURE_PA6T
+    The processor is PA6T.
+
+PPC_FEATURE_HAS_DFP
+    DFP facility is available.
+
+PPC_FEATURE_POWER6_EXT
+    The processor is POWER6.
+
+PPC_FEATURE_ARCH_2_06
+    The processor supports the v2.06 userlevel architecture. Processors
+    supporting later architectures also set this feature.
+
+PPC_FEATURE_HAS_VSX
+    VSX facility is available.
+
+PPC_FEATURE_PSERIES_PERFMON_COMPAT
+    The processor supports architected PMU events in the range 0xE0-0xFF.
+
+PPC_FEATURE_TRUE_LE
+    The processor supports true little-endian mode.
+
+PPC_FEATURE_PPC_LE
+    The processor supports "PowerPC Little-Endian", that uses address
+    munging to make storage access appear to be little-endian, but the
+    data is stored in a different format that is unsuitable to be
+    accessed by other agents not running in this mode.
+
+6. The HWCAPs exposed in AT_HWCAP2
+----------------------------------
+
+PPC_FEATURE2_ARCH_2_07
+    The processor supports the v2.07 userlevel architecture. Processors
+    supporting later architectures also set this feature.
+
+PPC_FEATURE2_HTM
+    Transactional Memory feature is available.
+
+PPC_FEATURE2_DSCR
+    DSCR facility is available.
+
+PPC_FEATURE2_EBB
+    EBB facility is available.
+
+PPC_FEATURE2_ISEL
+    isel instruction is available. This is superseded by ARCH_2_07 and
+    later.
+
+PPC_FEATURE2_TAR
+    TAR facility is available.
+
+PPC_FEATURE2_VEC_CRYPTO
+    v2.07 crypto instructions are available.
+
+PPC_FEATURE2_HTM_NOSC
+    System calls fail if called in a transactional state, see
+    Documentation/powerpc/syscall64-abi.rst
+
+PPC_FEATURE2_ARCH_3_00
+    The processor supports the v3.0B / v3.0C userlevel architecture. Processors
+    supporting later architectures also set this feature.
+
+PPC_FEATURE2_HAS_IEEE128
+    IEEE 128-bit binary floating point is supported with VSX
+    quad-precision instructions and data types.
+
+PPC_FEATURE2_DARN
+    darn instruction is available.
+
+PPC_FEATURE2_SCV
+    The scv 0 instruction may be used for system calls, see
+    Documentation/powerpc/syscall64-abi.rst.
+
+PPC_FEATURE2_HTM_NO_SUSPEND
+    A limited Transactional Memory facility that does not support suspend is
+    available, see Documentation/powerpc/transactional_memory.rst.
+
+PPC_FEATURE2_ARCH_3_1
+    The processor supports the v3.1 userlevel architecture. Processors
+    supporting later architectures also set this feature.
+
+PPC_FEATURE2_MMA
+    MMA facility is available.