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, 196 insertions, 0 deletions

diff --git a/arch/arm64/kvm/vmid.c b/arch/arm64/kvm/vmid.c
new file mode 100644
index 000000000..d78ae63d7
--- /dev/null
+++ b/arch/arm64/kvm/vmid.c
@@ -0,0 +1,196 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * VMID allocator.
+ *
+ * Based on Arm64 ASID allocator algorithm.
+ * Please refer arch/arm64/mm/context.c for detailed
+ * comments on algorithm.
+ *
+ * Copyright (C) 2002-2003 Deep Blue Solutions Ltd, all rights reserved.
+ * Copyright (C) 2012 ARM Ltd.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+
+#include <asm/kvm_asm.h>
+#include <asm/kvm_mmu.h>
+
+unsigned int kvm_arm_vmid_bits;
+static DEFINE_RAW_SPINLOCK(cpu_vmid_lock);
+
+static atomic64_t vmid_generation;
+static unsigned long *vmid_map;
+
+static DEFINE_PER_CPU(atomic64_t, active_vmids);
+static DEFINE_PER_CPU(u64, reserved_vmids);
+
+#define VMID_MASK		(~GENMASK(kvm_arm_vmid_bits - 1, 0))
+#define VMID_FIRST_VERSION	(1UL << kvm_arm_vmid_bits)
+
+#define NUM_USER_VMIDS		VMID_FIRST_VERSION
+#define vmid2idx(vmid)		((vmid) & ~VMID_MASK)
+#define idx2vmid(idx)		vmid2idx(idx)
+
+/*
+ * As vmid #0 is always reserved, we will never allocate one
+ * as below and can be treated as invalid. This is used to
+ * set the active_vmids on vCPU schedule out.
+ */
+#define VMID_ACTIVE_INVALID		VMID_FIRST_VERSION
+
+#define vmid_gen_match(vmid) \
+	(!(((vmid) ^ atomic64_read(&vmid_generation)) >> kvm_arm_vmid_bits))
+
+static void flush_context(void)
+{
+	int cpu;
+	u64 vmid;
+
+	bitmap_clear(vmid_map, 0, NUM_USER_VMIDS);
+
+	for_each_possible_cpu(cpu) {
+		vmid = atomic64_xchg_relaxed(&per_cpu(active_vmids, cpu), 0);
+
+		/* Preserve reserved VMID */
+		if (vmid == 0)
+			vmid = per_cpu(reserved_vmids, cpu);
+		__set_bit(vmid2idx(vmid), vmid_map);
+		per_cpu(reserved_vmids, cpu) = vmid;
+	}
+
+	/*
+	 * Unlike ASID allocator, we expect less frequent rollover in
+	 * case of VMIDs. Hence, instead of marking the CPU as
+	 * flush_pending and issuing a local context invalidation on
+	 * the next context-switch, we broadcast TLB flush + I-cache
+	 * invalidation over the inner shareable domain on rollover.
+	 */
+	kvm_call_hyp(__kvm_flush_vm_context);
+}
+
+static bool check_update_reserved_vmid(u64 vmid, u64 newvmid)
+{
+	int cpu;
+	bool hit = false;
+
+	/*
+	 * Iterate over the set of reserved VMIDs looking for a match
+	 * and update to use newvmid (i.e. the same VMID in the current
+	 * generation).
+	 */
+	for_each_possible_cpu(cpu) {
+		if (per_cpu(reserved_vmids, cpu) == vmid) {
+			hit = true;
+			per_cpu(reserved_vmids, cpu) = newvmid;
+		}
+	}
+
+	return hit;
+}
+
+static u64 new_vmid(struct kvm_vmid *kvm_vmid)
+{
+	static u32 cur_idx = 1;
+	u64 vmid = atomic64_read(&kvm_vmid->id);
+	u64 generation = atomic64_read(&vmid_generation);
+
+	if (vmid != 0) {
+		u64 newvmid = generation | (vmid & ~VMID_MASK);
+
+		if (check_update_reserved_vmid(vmid, newvmid)) {
+			atomic64_set(&kvm_vmid->id, newvmid);
+			return newvmid;
+		}
+
+		if (!__test_and_set_bit(vmid2idx(vmid), vmid_map)) {
+			atomic64_set(&kvm_vmid->id, newvmid);
+			return newvmid;
+		}
+	}
+
+	vmid = find_next_zero_bit(vmid_map, NUM_USER_VMIDS, cur_idx);
+	if (vmid != NUM_USER_VMIDS)
+		goto set_vmid;
+
+	/* We're out of VMIDs, so increment the global generation count */
+	generation = atomic64_add_return_relaxed(VMID_FIRST_VERSION,
+						 &vmid_generation);
+	flush_context();
+
+	/* We have more VMIDs than CPUs, so this will always succeed */
+	vmid = find_next_zero_bit(vmid_map, NUM_USER_VMIDS, 1);
+
+set_vmid:
+	__set_bit(vmid, vmid_map);
+	cur_idx = vmid;
+	vmid = idx2vmid(vmid) | generation;
+	atomic64_set(&kvm_vmid->id, vmid);
+	return vmid;
+}
+
+/* Called from vCPU sched out with preemption disabled */
+void kvm_arm_vmid_clear_active(void)
+{
+	atomic64_set(this_cpu_ptr(&active_vmids), VMID_ACTIVE_INVALID);
+}
+
+void kvm_arm_vmid_update(struct kvm_vmid *kvm_vmid)
+{
+	unsigned long flags;
+	u64 vmid, old_active_vmid;
+
+	vmid = atomic64_read(&kvm_vmid->id);
+
+	/*
+	 * Please refer comments in check_and_switch_context() in
+	 * arch/arm64/mm/context.c.
+	 *
+	 * Unlike ASID allocator, we set the active_vmids to
+	 * VMID_ACTIVE_INVALID on vCPU schedule out to avoid
+	 * reserving the VMID space needlessly on rollover.
+	 * Hence explicitly check here for a "!= 0" to
+	 * handle the sync with a concurrent rollover.
+	 */
+	old_active_vmid = atomic64_read(this_cpu_ptr(&active_vmids));
+	if (old_active_vmid != 0 && vmid_gen_match(vmid) &&
+	    0 != atomic64_cmpxchg_relaxed(this_cpu_ptr(&active_vmids),
+					  old_active_vmid, vmid))
+		return;
+
+	raw_spin_lock_irqsave(&cpu_vmid_lock, flags);
+
+	/* Check that our VMID belongs to the current generation. */
+	vmid = atomic64_read(&kvm_vmid->id);
+	if (!vmid_gen_match(vmid))
+		vmid = new_vmid(kvm_vmid);
+
+	atomic64_set(this_cpu_ptr(&active_vmids), vmid);
+	raw_spin_unlock_irqrestore(&cpu_vmid_lock, flags);
+}
+
+/*
+ * Initialize the VMID allocator
+ */
+int kvm_arm_vmid_alloc_init(void)
+{
+	kvm_arm_vmid_bits = kvm_get_vmid_bits();
+
+	/*
+	 * Expect allocation after rollover to fail if we don't have
+	 * at least one more VMID than CPUs. VMID #0 is always reserved.
+	 */
+	WARN_ON(NUM_USER_VMIDS - 1 <= num_possible_cpus());
+	atomic64_set(&vmid_generation, VMID_FIRST_VERSION);
+	vmid_map = kcalloc(BITS_TO_LONGS(NUM_USER_VMIDS),
+			   sizeof(*vmid_map), GFP_KERNEL);
+	if (!vmid_map)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void kvm_arm_vmid_alloc_free(void)
+{
+	kfree(vmid_map);
+}