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, 479 insertions, 0 deletions

diff --git a/kernel/bpf/cpumask.c b/kernel/bpf/cpumask.c
new file mode 100644
index 000000000..52b981512
--- /dev/null
+++ b/kernel/bpf/cpumask.c
@@ -0,0 +1,479 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2023 Meta, Inc */
+#include <linux/bpf.h>
+#include <linux/bpf_mem_alloc.h>
+#include <linux/btf.h>
+#include <linux/btf_ids.h>
+#include <linux/cpumask.h>
+
+/**
+ * struct bpf_cpumask - refcounted BPF cpumask wrapper structure
+ * @cpumask:	The actual cpumask embedded in the struct.
+ * @usage:	Object reference counter. When the refcount goes to 0, the
+ *		memory is released back to the BPF allocator, which provides
+ *		RCU safety.
+ *
+ * Note that we explicitly embed a cpumask_t rather than a cpumask_var_t.  This
+ * is done to avoid confusing the verifier due to the typedef of cpumask_var_t
+ * changing depending on whether CONFIG_CPUMASK_OFFSTACK is defined or not. See
+ * the details in <linux/cpumask.h>. The consequence is that this structure is
+ * likely a bit larger than it needs to be when CONFIG_CPUMASK_OFFSTACK is
+ * defined due to embedding the whole NR_CPUS-size bitmap, but the extra memory
+ * overhead is minimal. For the more typical case of CONFIG_CPUMASK_OFFSTACK
+ * not being defined, the structure is the same size regardless.
+ */
+struct bpf_cpumask {
+	cpumask_t cpumask;
+	refcount_t usage;
+};
+
+static struct bpf_mem_alloc bpf_cpumask_ma;
+
+static bool cpu_valid(u32 cpu)
+{
+	return cpu < nr_cpu_ids;
+}
+
+__diag_push();
+__diag_ignore_all("-Wmissing-prototypes",
+		  "Global kfuncs as their definitions will be in BTF");
+
+/**
+ * bpf_cpumask_create() - Create a mutable BPF cpumask.
+ *
+ * Allocates a cpumask that can be queried, mutated, acquired, and released by
+ * a BPF program. The cpumask returned by this function must either be embedded
+ * in a map as a kptr, or freed with bpf_cpumask_release().
+ *
+ * bpf_cpumask_create() allocates memory using the BPF memory allocator, and
+ * will not block. It may return NULL if no memory is available.
+ */
+__bpf_kfunc struct bpf_cpumask *bpf_cpumask_create(void)
+{
+	struct bpf_cpumask *cpumask;
+
+	/* cpumask must be the first element so struct bpf_cpumask be cast to struct cpumask. */
+	BUILD_BUG_ON(offsetof(struct bpf_cpumask, cpumask) != 0);
+
+	cpumask = bpf_mem_alloc(&bpf_cpumask_ma, sizeof(*cpumask));
+	if (!cpumask)
+		return NULL;
+
+	memset(cpumask, 0, sizeof(*cpumask));
+	refcount_set(&cpumask->usage, 1);
+
+	return cpumask;
+}
+
+/**
+ * bpf_cpumask_acquire() - Acquire a reference to a BPF cpumask.
+ * @cpumask: The BPF cpumask being acquired. The cpumask must be a trusted
+ *	     pointer.
+ *
+ * Acquires a reference to a BPF cpumask. The cpumask returned by this function
+ * must either be embedded in a map as a kptr, or freed with
+ * bpf_cpumask_release().
+ */
+__bpf_kfunc struct bpf_cpumask *bpf_cpumask_acquire(struct bpf_cpumask *cpumask)
+{
+	refcount_inc(&cpumask->usage);
+	return cpumask;
+}
+
+/**
+ * bpf_cpumask_kptr_get() - Attempt to acquire a reference to a BPF cpumask
+ *			    stored in a map.
+ * @cpumaskp: A pointer to a BPF cpumask map value.
+ *
+ * Attempts to acquire a reference to a BPF cpumask stored in a map value. The
+ * cpumask returned by this function must either be embedded in a map as a
+ * kptr, or freed with bpf_cpumask_release(). This function may return NULL if
+ * no BPF cpumask was found in the specified map value.
+ */
+__bpf_kfunc struct bpf_cpumask *bpf_cpumask_kptr_get(struct bpf_cpumask **cpumaskp)
+{
+	struct bpf_cpumask *cpumask;
+
+	/* The BPF memory allocator frees memory backing its caches in an RCU
+	 * callback. Thus, we can safely use RCU to ensure that the cpumask is
+	 * safe to read.
+	 */
+	rcu_read_lock();
+
+	cpumask = READ_ONCE(*cpumaskp);
+	if (cpumask && !refcount_inc_not_zero(&cpumask->usage))
+		cpumask = NULL;
+
+	rcu_read_unlock();
+	return cpumask;
+}
+
+/**
+ * bpf_cpumask_release() - Release a previously acquired BPF cpumask.
+ * @cpumask: The cpumask being released.
+ *
+ * Releases a previously acquired reference to a BPF cpumask. When the final
+ * reference of the BPF cpumask has been released, it is subsequently freed in
+ * an RCU callback in the BPF memory allocator.
+ */
+__bpf_kfunc void bpf_cpumask_release(struct bpf_cpumask *cpumask)
+{
+	if (!cpumask)
+		return;
+
+	if (refcount_dec_and_test(&cpumask->usage)) {
+		migrate_disable();
+		bpf_mem_free(&bpf_cpumask_ma, cpumask);
+		migrate_enable();
+	}
+}
+
+/**
+ * bpf_cpumask_first() - Get the index of the first nonzero bit in the cpumask.
+ * @cpumask: The cpumask being queried.
+ *
+ * Find the index of the first nonzero bit of the cpumask. A struct bpf_cpumask
+ * pointer may be safely passed to this function.
+ */
+__bpf_kfunc u32 bpf_cpumask_first(const struct cpumask *cpumask)
+{
+	return cpumask_first(cpumask);
+}
+
+/**
+ * bpf_cpumask_first_zero() - Get the index of the first unset bit in the
+ *			      cpumask.
+ * @cpumask: The cpumask being queried.
+ *
+ * Find the index of the first unset bit of the cpumask. A struct bpf_cpumask
+ * pointer may be safely passed to this function.
+ */
+__bpf_kfunc u32 bpf_cpumask_first_zero(const struct cpumask *cpumask)
+{
+	return cpumask_first_zero(cpumask);
+}
+
+/**
+ * bpf_cpumask_set_cpu() - Set a bit for a CPU in a BPF cpumask.
+ * @cpu: The CPU to be set in the cpumask.
+ * @cpumask: The BPF cpumask in which a bit is being set.
+ */
+__bpf_kfunc void bpf_cpumask_set_cpu(u32 cpu, struct bpf_cpumask *cpumask)
+{
+	if (!cpu_valid(cpu))
+		return;
+
+	cpumask_set_cpu(cpu, (struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_clear_cpu() - Clear a bit for a CPU in a BPF cpumask.
+ * @cpu: The CPU to be cleared from the cpumask.
+ * @cpumask: The BPF cpumask in which a bit is being cleared.
+ */
+__bpf_kfunc void bpf_cpumask_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask)
+{
+	if (!cpu_valid(cpu))
+		return;
+
+	cpumask_clear_cpu(cpu, (struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_test_cpu() - Test whether a CPU is set in a cpumask.
+ * @cpu: The CPU being queried for.
+ * @cpumask: The cpumask being queried for containing a CPU.
+ *
+ * Return:
+ * * true  - @cpu is set in the cpumask
+ * * false - @cpu was not set in the cpumask, or @cpu is an invalid cpu.
+ */
+__bpf_kfunc bool bpf_cpumask_test_cpu(u32 cpu, const struct cpumask *cpumask)
+{
+	if (!cpu_valid(cpu))
+		return false;
+
+	return cpumask_test_cpu(cpu, (struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_test_and_set_cpu() - Atomically test and set a CPU in a BPF cpumask.
+ * @cpu: The CPU being set and queried for.
+ * @cpumask: The BPF cpumask being set and queried for containing a CPU.
+ *
+ * Return:
+ * * true  - @cpu is set in the cpumask
+ * * false - @cpu was not set in the cpumask, or @cpu is invalid.
+ */
+__bpf_kfunc bool bpf_cpumask_test_and_set_cpu(u32 cpu, struct bpf_cpumask *cpumask)
+{
+	if (!cpu_valid(cpu))
+		return false;
+
+	return cpumask_test_and_set_cpu(cpu, (struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_test_and_clear_cpu() - Atomically test and clear a CPU in a BPF
+ *				      cpumask.
+ * @cpu: The CPU being cleared and queried for.
+ * @cpumask: The BPF cpumask being cleared and queried for containing a CPU.
+ *
+ * Return:
+ * * true  - @cpu is set in the cpumask
+ * * false - @cpu was not set in the cpumask, or @cpu is invalid.
+ */
+__bpf_kfunc bool bpf_cpumask_test_and_clear_cpu(u32 cpu, struct bpf_cpumask *cpumask)
+{
+	if (!cpu_valid(cpu))
+		return false;
+
+	return cpumask_test_and_clear_cpu(cpu, (struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_setall() - Set all of the bits in a BPF cpumask.
+ * @cpumask: The BPF cpumask having all of its bits set.
+ */
+__bpf_kfunc void bpf_cpumask_setall(struct bpf_cpumask *cpumask)
+{
+	cpumask_setall((struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_clear() - Clear all of the bits in a BPF cpumask.
+ * @cpumask: The BPF cpumask being cleared.
+ */
+__bpf_kfunc void bpf_cpumask_clear(struct bpf_cpumask *cpumask)
+{
+	cpumask_clear((struct cpumask *)cpumask);
+}
+
+/**
+ * bpf_cpumask_and() - AND two cpumasks and store the result.
+ * @dst: The BPF cpumask where the result is being stored.
+ * @src1: The first input.
+ * @src2: The second input.
+ *
+ * Return:
+ * * true  - @dst has at least one bit set following the operation
+ * * false - @dst is empty following the operation
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc bool bpf_cpumask_and(struct bpf_cpumask *dst,
+				 const struct cpumask *src1,
+				 const struct cpumask *src2)
+{
+	return cpumask_and((struct cpumask *)dst, src1, src2);
+}
+
+/**
+ * bpf_cpumask_or() - OR two cpumasks and store the result.
+ * @dst: The BPF cpumask where the result is being stored.
+ * @src1: The first input.
+ * @src2: The second input.
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc void bpf_cpumask_or(struct bpf_cpumask *dst,
+				const struct cpumask *src1,
+				const struct cpumask *src2)
+{
+	cpumask_or((struct cpumask *)dst, src1, src2);
+}
+
+/**
+ * bpf_cpumask_xor() - XOR two cpumasks and store the result.
+ * @dst: The BPF cpumask where the result is being stored.
+ * @src1: The first input.
+ * @src2: The second input.
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc void bpf_cpumask_xor(struct bpf_cpumask *dst,
+				 const struct cpumask *src1,
+				 const struct cpumask *src2)
+{
+	cpumask_xor((struct cpumask *)dst, src1, src2);
+}
+
+/**
+ * bpf_cpumask_equal() - Check two cpumasks for equality.
+ * @src1: The first input.
+ * @src2: The second input.
+ *
+ * Return:
+ * * true   - @src1 and @src2 have the same bits set.
+ * * false  - @src1 and @src2 differ in at least one bit.
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc bool bpf_cpumask_equal(const struct cpumask *src1, const struct cpumask *src2)
+{
+	return cpumask_equal(src1, src2);
+}
+
+/**
+ * bpf_cpumask_intersects() - Check two cpumasks for overlap.
+ * @src1: The first input.
+ * @src2: The second input.
+ *
+ * Return:
+ * * true   - @src1 and @src2 have at least one of the same bits set.
+ * * false  - @src1 and @src2 don't have any of the same bits set.
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc bool bpf_cpumask_intersects(const struct cpumask *src1, const struct cpumask *src2)
+{
+	return cpumask_intersects(src1, src2);
+}
+
+/**
+ * bpf_cpumask_subset() - Check if a cpumask is a subset of another.
+ * @src1: The first cpumask being checked as a subset.
+ * @src2: The second cpumask being checked as a superset.
+ *
+ * Return:
+ * * true   - All of the bits of @src1 are set in @src2.
+ * * false  - At least one bit in @src1 is not set in @src2.
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc bool bpf_cpumask_subset(const struct cpumask *src1, const struct cpumask *src2)
+{
+	return cpumask_subset(src1, src2);
+}
+
+/**
+ * bpf_cpumask_empty() - Check if a cpumask is empty.
+ * @cpumask: The cpumask being checked.
+ *
+ * Return:
+ * * true   - None of the bits in @cpumask are set.
+ * * false  - At least one bit in @cpumask is set.
+ *
+ * A struct bpf_cpumask pointer may be safely passed to @cpumask.
+ */
+__bpf_kfunc bool bpf_cpumask_empty(const struct cpumask *cpumask)
+{
+	return cpumask_empty(cpumask);
+}
+
+/**
+ * bpf_cpumask_full() - Check if a cpumask has all bits set.
+ * @cpumask: The cpumask being checked.
+ *
+ * Return:
+ * * true   - All of the bits in @cpumask are set.
+ * * false  - At least one bit in @cpumask is cleared.
+ *
+ * A struct bpf_cpumask pointer may be safely passed to @cpumask.
+ */
+__bpf_kfunc bool bpf_cpumask_full(const struct cpumask *cpumask)
+{
+	return cpumask_full(cpumask);
+}
+
+/**
+ * bpf_cpumask_copy() - Copy the contents of a cpumask into a BPF cpumask.
+ * @dst: The BPF cpumask being copied into.
+ * @src: The cpumask being copied.
+ *
+ * A struct bpf_cpumask pointer may be safely passed to @src.
+ */
+__bpf_kfunc void bpf_cpumask_copy(struct bpf_cpumask *dst, const struct cpumask *src)
+{
+	cpumask_copy((struct cpumask *)dst, src);
+}
+
+/**
+ * bpf_cpumask_any() - Return a random set CPU from a cpumask.
+ * @cpumask: The cpumask being queried.
+ *
+ * Return:
+ * * A random set bit within [0, num_cpus) if at least one bit is set.
+ * * >= num_cpus if no bit is set.
+ *
+ * A struct bpf_cpumask pointer may be safely passed to @src.
+ */
+__bpf_kfunc u32 bpf_cpumask_any(const struct cpumask *cpumask)
+{
+	return cpumask_any(cpumask);
+}
+
+/**
+ * bpf_cpumask_any_and() - Return a random set CPU from the AND of two
+ *			   cpumasks.
+ * @src1: The first cpumask.
+ * @src2: The second cpumask.
+ *
+ * Return:
+ * * A random set bit within [0, num_cpus) if at least one bit is set.
+ * * >= num_cpus if no bit is set.
+ *
+ * struct bpf_cpumask pointers may be safely passed to @src1 and @src2.
+ */
+__bpf_kfunc u32 bpf_cpumask_any_and(const struct cpumask *src1, const struct cpumask *src2)
+{
+	return cpumask_any_and(src1, src2);
+}
+
+__diag_pop();
+
+BTF_SET8_START(cpumask_kfunc_btf_ids)
+BTF_ID_FLAGS(func, bpf_cpumask_create, KF_ACQUIRE | KF_RET_NULL)
+BTF_ID_FLAGS(func, bpf_cpumask_release, KF_RELEASE | KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_acquire, KF_ACQUIRE | KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_kptr_get, KF_ACQUIRE | KF_KPTR_GET | KF_RET_NULL)
+BTF_ID_FLAGS(func, bpf_cpumask_first, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_first_zero, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_set_cpu, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_clear_cpu, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_test_cpu, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_test_and_set_cpu, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_test_and_clear_cpu, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_setall, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_clear, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_and, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_or, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_xor, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_equal, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_intersects, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_subset, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_empty, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_full, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_copy, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_any, KF_TRUSTED_ARGS)
+BTF_ID_FLAGS(func, bpf_cpumask_any_and, KF_TRUSTED_ARGS)
+BTF_SET8_END(cpumask_kfunc_btf_ids)
+
+static const struct btf_kfunc_id_set cpumask_kfunc_set = {
+	.owner = THIS_MODULE,
+	.set   = &cpumask_kfunc_btf_ids,
+};
+
+BTF_ID_LIST(cpumask_dtor_ids)
+BTF_ID(struct, bpf_cpumask)
+BTF_ID(func, bpf_cpumask_release)
+
+static int __init cpumask_kfunc_init(void)
+{
+	int ret;
+	const struct btf_id_dtor_kfunc cpumask_dtors[] = {
+		{
+			.btf_id	      = cpumask_dtor_ids[0],
+			.kfunc_btf_id = cpumask_dtor_ids[1]
+		},
+	};
+
+	ret = bpf_mem_alloc_init(&bpf_cpumask_ma, 0, false);
+	ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &cpumask_kfunc_set);
+	ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &cpumask_kfunc_set);
+	return  ret ?: register_btf_id_dtor_kfuncs(cpumask_dtors,
+						   ARRAY_SIZE(cpumask_dtors),
+						   THIS_MODULE);
+}
+
+late_initcall(cpumask_kfunc_init);