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, 354 insertions, 0 deletions

diff --git a/Documentation/x86/mtrr.rst b/Documentation/x86/mtrr.rst
new file mode 100644
index 000000000..9f0b18517
--- /dev/null
+++ b/Documentation/x86/mtrr.rst
@@ -0,0 +1,354 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=========================================
+MTRR (Memory Type Range Register) control
+=========================================
+
+:Authors: - Richard Gooch <rgooch@atnf.csiro.au> - 3 Jun 1999
+          - Luis R. Rodriguez <mcgrof@do-not-panic.com> - April 9, 2015
+
+
+Phasing out MTRR use
+====================
+
+MTRR use is replaced on modern x86 hardware with PAT. Direct MTRR use by
+drivers on Linux is now completely phased out, device drivers should use
+arch_phys_wc_add() in combination with ioremap_wc() to make MTRR effective on
+non-PAT systems while a no-op but equally effective on PAT enabled systems.
+
+Even if Linux does not use MTRRs directly, some x86 platform firmware may still
+set up MTRRs early before booting the OS. They do this as some platform
+firmware may still have implemented access to MTRRs which would be controlled
+and handled by the platform firmware directly. An example of platform use of
+MTRRs is through the use of SMI handlers, one case could be for fan control,
+the platform code would need uncachable access to some of its fan control
+registers. Such platform access does not need any Operating System MTRR code in
+place other than mtrr_type_lookup() to ensure any OS specific mapping requests
+are aligned with platform MTRR setup. If MTRRs are only set up by the platform
+firmware code though and the OS does not make any specific MTRR mapping
+requests mtrr_type_lookup() should always return MTRR_TYPE_INVALID.
+
+For details refer to Documentation/x86/pat.rst.
+
+.. tip::
+  On Intel P6 family processors (Pentium Pro, Pentium II and later)
+  the Memory Type Range Registers (MTRRs) may be used to control
+  processor access to memory ranges. This is most useful when you have
+  a video (VGA) card on a PCI or AGP bus. Enabling write-combining
+  allows bus write transfers to be combined into a larger transfer
+  before bursting over the PCI/AGP bus. This can increase performance
+  of image write operations 2.5 times or more.
+
+  The Cyrix 6x86, 6x86MX and M II processors have Address Range
+  Registers (ARRs) which provide a similar functionality to MTRRs. For
+  these, the ARRs are used to emulate the MTRRs.
+
+  The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
+  MTRRs. These are supported.  The AMD Athlon family provide 8 Intel
+  style MTRRs.
+
+  The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. These
+  are supported.
+
+  The VIA Cyrix III and VIA C3 CPUs offer 8 Intel style MTRRs.
+
+  The CONFIG_MTRR option creates a /proc/mtrr file which may be used
+  to manipulate your MTRRs. Typically the X server should use
+  this. This should have a reasonably generic interface so that
+  similar control registers on other processors can be easily
+  supported.
+
+There are two interfaces to /proc/mtrr: one is an ASCII interface
+which allows you to read and write. The other is an ioctl()
+interface. The ASCII interface is meant for administration. The
+ioctl() interface is meant for C programs (i.e. the X server). The
+interfaces are described below, with sample commands and C code.
+
+
+Reading MTRRs from the shell
+============================
+::
+
+  % cat /proc/mtrr
+  reg00: base=0x00000000 (   0MB), size= 128MB: write-back, count=1
+  reg01: base=0x08000000 ( 128MB), size=  64MB: write-back, count=1
+
+Creating MTRRs from the C-shell::
+
+  # echo "base=0xf8000000 size=0x400000 type=write-combining" >! /proc/mtrr
+
+or if you use bash::
+
+  # echo "base=0xf8000000 size=0x400000 type=write-combining" >| /proc/mtrr
+
+And the result thereof::
+
+  % cat /proc/mtrr
+  reg00: base=0x00000000 (   0MB), size= 128MB: write-back, count=1
+  reg01: base=0x08000000 ( 128MB), size=  64MB: write-back, count=1
+  reg02: base=0xf8000000 (3968MB), size=   4MB: write-combining, count=1
+
+This is for video RAM at base address 0xf8000000 and size 4 megabytes. To
+find out your base address, you need to look at the output of your X
+server, which tells you where the linear framebuffer address is. A
+typical line that you may get is::
+
+  (--) S3: PCI: 968 rev 0, Linear FB @ 0xf8000000
+
+Note that you should only use the value from the X server, as it may
+move the framebuffer base address, so the only value you can trust is
+that reported by the X server.
+
+To find out the size of your framebuffer (what, you don't actually
+know?), the following line will tell you::
+
+  (--) S3: videoram:  4096k
+
+That's 4 megabytes, which is 0x400000 bytes (in hexadecimal).
+A patch is being written for XFree86 which will make this automatic:
+in other words the X server will manipulate /proc/mtrr using the
+ioctl() interface, so users won't have to do anything. If you use a
+commercial X server, lobby your vendor to add support for MTRRs.
+
+
+Creating overlapping MTRRs
+==========================
+::
+
+  %echo "base=0xfb000000 size=0x1000000 type=write-combining" >/proc/mtrr
+  %echo "base=0xfb000000 size=0x1000 type=uncachable" >/proc/mtrr
+
+And the results::
+
+  % cat /proc/mtrr
+  reg00: base=0x00000000 (   0MB), size=  64MB: write-back, count=1
+  reg01: base=0xfb000000 (4016MB), size=  16MB: write-combining, count=1
+  reg02: base=0xfb000000 (4016MB), size=   4kB: uncachable, count=1
+
+Some cards (especially Voodoo Graphics boards) need this 4 kB area
+excluded from the beginning of the region because it is used for
+registers.
+
+NOTE: You can only create type=uncachable region, if the first
+region that you created is type=write-combining.
+
+
+Removing MTRRs from the C-shel
+==============================
+::
+
+  % echo "disable=2" >! /proc/mtrr
+
+or using bash::
+
+  % echo "disable=2" >| /proc/mtrr
+
+
+Reading MTRRs from a C program using ioctl()'s
+==============================================
+::
+
+  /*  mtrr-show.c
+
+      Source file for mtrr-show (example program to show MTRRs using ioctl()'s)
+
+      Copyright (C) 1997-1998  Richard Gooch
+
+      This program is free software; you can redistribute it and/or modify
+      it under the terms of the GNU General Public License as published by
+      the Free Software Foundation; either version 2 of the License, or
+      (at your option) any later version.
+
+      This program is distributed in the hope that it will be useful,
+      but WITHOUT ANY WARRANTY; without even the implied warranty of
+      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+      GNU General Public License for more details.
+
+      You should have received a copy of the GNU General Public License
+      along with this program; if not, write to the Free Software
+      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+      Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
+      The postal address is:
+        Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
+  */
+
+  /*
+      This program will use an ioctl() on /proc/mtrr to show the current MTRR
+      settings. This is an alternative to reading /proc/mtrr.
+
+
+      Written by      Richard Gooch   17-DEC-1997
+
+      Last updated by Richard Gooch   2-MAY-1998
+
+
+  */
+  #include <stdio.h>
+  #include <stdlib.h>
+  #include <string.h>
+  #include <sys/types.h>
+  #include <sys/stat.h>
+  #include <fcntl.h>
+  #include <sys/ioctl.h>
+  #include <errno.h>
+  #include <asm/mtrr.h>
+
+  #define TRUE 1
+  #define FALSE 0
+  #define ERRSTRING strerror (errno)
+
+  static char *mtrr_strings[MTRR_NUM_TYPES] =
+  {
+      "uncachable",               /* 0 */
+      "write-combining",          /* 1 */
+      "?",                        /* 2 */
+      "?",                        /* 3 */
+      "write-through",            /* 4 */
+      "write-protect",            /* 5 */
+      "write-back",               /* 6 */
+  };
+
+  int main ()
+  {
+      int fd;
+      struct mtrr_gentry gentry;
+
+      if ( ( fd = open ("/proc/mtrr", O_RDONLY, 0) ) == -1 )
+      {
+    if (errno == ENOENT)
+    {
+        fputs ("/proc/mtrr not found: not supported or you don't have a PPro?\n",
+        stderr);
+        exit (1);
+    }
+    fprintf (stderr, "Error opening /proc/mtrr\t%s\n", ERRSTRING);
+    exit (2);
+      }
+      for (gentry.regnum = 0; ioctl (fd, MTRRIOC_GET_ENTRY, &gentry) == 0;
+    ++gentry.regnum)
+      {
+    if (gentry.size < 1)
+    {
+        fprintf (stderr, "Register: %u disabled\n", gentry.regnum);
+        continue;
+    }
+    fprintf (stderr, "Register: %u base: 0x%lx size: 0x%lx type: %s\n",
+      gentry.regnum, gentry.base, gentry.size,
+      mtrr_strings[gentry.type]);
+      }
+      if (errno == EINVAL) exit (0);
+      fprintf (stderr, "Error doing ioctl(2) on /dev/mtrr\t%s\n", ERRSTRING);
+      exit (3);
+  }   /*  End Function main  */
+
+
+Creating MTRRs from a C programme using ioctl()'s
+=================================================
+::
+
+  /*  mtrr-add.c
+
+      Source file for mtrr-add (example programme to add an MTRRs using ioctl())
+
+      Copyright (C) 1997-1998  Richard Gooch
+
+      This program is free software; you can redistribute it and/or modify
+      it under the terms of the GNU General Public License as published by
+      the Free Software Foundation; either version 2 of the License, or
+      (at your option) any later version.
+
+      This program is distributed in the hope that it will be useful,
+      but WITHOUT ANY WARRANTY; without even the implied warranty of
+      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+      GNU General Public License for more details.
+
+      You should have received a copy of the GNU General Public License
+      along with this program; if not, write to the Free Software
+      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+      Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
+      The postal address is:
+        Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
+  */
+
+  /*
+      This programme will use an ioctl() on /proc/mtrr to add an entry. The first
+      available mtrr is used. This is an alternative to writing /proc/mtrr.
+
+
+      Written by      Richard Gooch   17-DEC-1997
+
+      Last updated by Richard Gooch   2-MAY-1998
+
+
+  */
+  #include <stdio.h>
+  #include <string.h>
+  #include <stdlib.h>
+  #include <unistd.h>
+  #include <sys/types.h>
+  #include <sys/stat.h>
+  #include <fcntl.h>
+  #include <sys/ioctl.h>
+  #include <errno.h>
+  #include <asm/mtrr.h>
+
+  #define TRUE 1
+  #define FALSE 0
+  #define ERRSTRING strerror (errno)
+
+  static char *mtrr_strings[MTRR_NUM_TYPES] =
+  {
+      "uncachable",               /* 0 */
+      "write-combining",          /* 1 */
+      "?",                        /* 2 */
+      "?",                        /* 3 */
+      "write-through",            /* 4 */
+      "write-protect",            /* 5 */
+      "write-back",               /* 6 */
+  };
+
+  int main (int argc, char **argv)
+  {
+      int fd;
+      struct mtrr_sentry sentry;
+
+      if (argc != 4)
+      {
+    fprintf (stderr, "Usage:\tmtrr-add base size type\n");
+    exit (1);
+      }
+      sentry.base = strtoul (argv[1], NULL, 0);
+      sentry.size = strtoul (argv[2], NULL, 0);
+      for (sentry.type = 0; sentry.type < MTRR_NUM_TYPES; ++sentry.type)
+      {
+    if (strcmp (argv[3], mtrr_strings[sentry.type]) == 0) break;
+      }
+      if (sentry.type >= MTRR_NUM_TYPES)
+      {
+    fprintf (stderr, "Illegal type: \"%s\"\n", argv[3]);
+    exit (2);
+      }
+      if ( ( fd = open ("/proc/mtrr", O_WRONLY, 0) ) == -1 )
+      {
+    if (errno == ENOENT)
+    {
+        fputs ("/proc/mtrr not found: not supported or you don't have a PPro?\n",
+        stderr);
+        exit (3);
+    }
+    fprintf (stderr, "Error opening /proc/mtrr\t%s\n", ERRSTRING);
+    exit (4);
+      }
+      if (ioctl (fd, MTRRIOC_ADD_ENTRY, &sentry) == -1)
+      {
+    fprintf (stderr, "Error doing ioctl(2) on /dev/mtrr\t%s\n", ERRSTRING);
+    exit (5);
+      }
+      fprintf (stderr, "Sleeping for 5 seconds so you can see the new entry\n");
+      sleep (5);
+      close (fd);
+      fputs ("I've just closed /proc/mtrr so now the new entry should be gone\n",
+      stderr);
+  }   /*  End Function main  */