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, 246 insertions, 0 deletions

diff --git a/arch/loongarch/kernel/alternative.c b/arch/loongarch/kernel/alternative.c
new file mode 100644
index 000000000..4ad13847e
--- /dev/null
+++ b/arch/loongarch/kernel/alternative.c
@@ -0,0 +1,246 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <asm/alternative.h>
+#include <asm/cacheflush.h>
+#include <asm/inst.h>
+#include <asm/sections.h>
+
+int __read_mostly alternatives_patched;
+
+EXPORT_SYMBOL_GPL(alternatives_patched);
+
+#define MAX_PATCH_SIZE (((u8)(-1)) / LOONGARCH_INSN_SIZE)
+
+static int __initdata_or_module debug_alternative;
+
+static int __init debug_alt(char *str)
+{
+	debug_alternative = 1;
+	return 1;
+}
+__setup("debug-alternative", debug_alt);
+
+#define DPRINTK(fmt, args...)						\
+do {									\
+	if (debug_alternative)						\
+		printk(KERN_DEBUG "%s: " fmt "\n", __func__, ##args);	\
+} while (0)
+
+#define DUMP_WORDS(buf, count, fmt, args...)				\
+do {									\
+	if (unlikely(debug_alternative)) {				\
+		int _j;							\
+		union loongarch_instruction *_buf = buf;		\
+									\
+		if (!(count))						\
+			break;						\
+									\
+		printk(KERN_DEBUG fmt, ##args);				\
+		for (_j = 0; _j < count - 1; _j++)			\
+			printk(KERN_CONT "<%08x> ", _buf[_j].word);	\
+		printk(KERN_CONT "<%08x>\n", _buf[_j].word);		\
+	}								\
+} while (0)
+
+/* Use this to add nops to a buffer, then text_poke the whole buffer. */
+static void __init_or_module add_nops(union loongarch_instruction *insn, int count)
+{
+	while (count--) {
+		insn->word = INSN_NOP;
+		insn++;
+	}
+}
+
+/* Is the jump addr in local .altinstructions */
+static inline bool in_alt_jump(unsigned long jump, void *start, void *end)
+{
+	return jump >= (unsigned long)start && jump < (unsigned long)end;
+}
+
+static void __init_or_module recompute_jump(union loongarch_instruction *buf,
+		union loongarch_instruction *dest, union loongarch_instruction *src,
+		void *start, void *end)
+{
+	unsigned int si, si_l, si_h;
+	unsigned long cur_pc, jump_addr, pc;
+	long offset;
+
+	cur_pc = (unsigned long)src;
+	pc = (unsigned long)dest;
+
+	si_l = src->reg0i26_format.immediate_l;
+	si_h = src->reg0i26_format.immediate_h;
+	switch (src->reg0i26_format.opcode) {
+	case b_op:
+	case bl_op:
+		jump_addr = cur_pc + sign_extend64((si_h << 16 | si_l) << 2, 27);
+		if (in_alt_jump(jump_addr, start, end))
+			return;
+		offset = jump_addr - pc;
+		BUG_ON(offset < -SZ_128M || offset >= SZ_128M);
+		offset >>= 2;
+		buf->reg0i26_format.immediate_h = offset >> 16;
+		buf->reg0i26_format.immediate_l = offset;
+		return;
+	}
+
+	si_l = src->reg1i21_format.immediate_l;
+	si_h = src->reg1i21_format.immediate_h;
+	switch (src->reg1i21_format.opcode) {
+	case bceqz_op: /* bceqz_op = bcnez_op */
+		BUG_ON(buf->reg1i21_format.rj & BIT(4));
+		fallthrough;
+	case beqz_op:
+	case bnez_op:
+		jump_addr = cur_pc + sign_extend64((si_h << 16 | si_l) << 2, 22);
+		if (in_alt_jump(jump_addr, start, end))
+			return;
+		offset = jump_addr - pc;
+		BUG_ON(offset < -SZ_4M || offset >= SZ_4M);
+		offset >>= 2;
+		buf->reg1i21_format.immediate_h = offset >> 16;
+		buf->reg1i21_format.immediate_l = offset;
+		return;
+	}
+
+	si = src->reg2i16_format.immediate;
+	switch (src->reg2i16_format.opcode) {
+	case beq_op:
+	case bne_op:
+	case blt_op:
+	case bge_op:
+	case bltu_op:
+	case bgeu_op:
+		jump_addr = cur_pc + sign_extend64(si << 2, 17);
+		if (in_alt_jump(jump_addr, start, end))
+			return;
+		offset = jump_addr - pc;
+		BUG_ON(offset < -SZ_128K || offset >= SZ_128K);
+		offset >>= 2;
+		buf->reg2i16_format.immediate = offset;
+		return;
+	}
+}
+
+static int __init_or_module copy_alt_insns(union loongarch_instruction *buf,
+	union loongarch_instruction *dest, union loongarch_instruction *src, int nr)
+{
+	int i;
+
+	for (i = 0; i < nr; i++) {
+		buf[i].word = src[i].word;
+
+		if (is_pc_ins(&src[i])) {
+			pr_err("Not support pcrel instruction at present!");
+			return -EINVAL;
+		}
+
+		if (is_branch_ins(&src[i]) &&
+		    src[i].reg2i16_format.opcode != jirl_op) {
+			recompute_jump(&buf[i], &dest[i], &src[i], src, src + nr);
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * text_poke_early - Update instructions on a live kernel at boot time
+ *
+ * When you use this code to patch more than one byte of an instruction
+ * you need to make sure that other CPUs cannot execute this code in parallel.
+ * Also no thread must be currently preempted in the middle of these
+ * instructions. And on the local CPU you need to be protected again NMI or MCE
+ * handlers seeing an inconsistent instruction while you patch.
+ */
+static void *__init_or_module text_poke_early(union loongarch_instruction *insn,
+			      union loongarch_instruction *buf, unsigned int nr)
+{
+	int i;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	for (i = 0; i < nr; i++)
+		insn[i].word = buf[i].word;
+
+	local_irq_restore(flags);
+
+	wbflush();
+	flush_icache_range((unsigned long)insn, (unsigned long)(insn + nr));
+
+	return insn;
+}
+
+/*
+ * Replace instructions with better alternatives for this CPU type. This runs
+ * before SMP is initialized to avoid SMP problems with self modifying code.
+ * This implies that asymmetric systems where APs have less capabilities than
+ * the boot processor are not handled. Tough. Make sure you disable such
+ * features by hand.
+ */
+void __init_or_module apply_alternatives(struct alt_instr *start, struct alt_instr *end)
+{
+	struct alt_instr *a;
+	unsigned int nr_instr, nr_repl, nr_insnbuf;
+	union loongarch_instruction *instr, *replacement;
+	union loongarch_instruction insnbuf[MAX_PATCH_SIZE];
+
+	DPRINTK("alt table %px, -> %px", start, end);
+	/*
+	 * The scan order should be from start to end. A later scanned
+	 * alternative code can overwrite previously scanned alternative code.
+	 * Some kernel functions (e.g. memcpy, memset, etc) use this order to
+	 * patch code.
+	 *
+	 * So be careful if you want to change the scan order to any other
+	 * order.
+	 */
+	for (a = start; a < end; a++) {
+		nr_insnbuf = 0;
+
+		instr = (void *)&a->instr_offset + a->instr_offset;
+		replacement = (void *)&a->replace_offset + a->replace_offset;
+
+		BUG_ON(a->instrlen > sizeof(insnbuf));
+		BUG_ON(a->instrlen & 0x3);
+		BUG_ON(a->replacementlen & 0x3);
+
+		nr_instr = a->instrlen / LOONGARCH_INSN_SIZE;
+		nr_repl = a->replacementlen / LOONGARCH_INSN_SIZE;
+
+		if (!cpu_has(a->feature)) {
+			DPRINTK("feat not exist: %d, old: (%px len: %d), repl: (%px, len: %d)",
+				a->feature, instr, a->instrlen,
+				replacement, a->replacementlen);
+
+			continue;
+		}
+
+		DPRINTK("feat: %d, old: (%px len: %d), repl: (%px, len: %d)",
+			a->feature, instr, a->instrlen,
+			replacement, a->replacementlen);
+
+		DUMP_WORDS(instr, nr_instr, "%px: old_insn: ", instr);
+		DUMP_WORDS(replacement, nr_repl, "%px: rpl_insn: ", replacement);
+
+		copy_alt_insns(insnbuf, instr, replacement, nr_repl);
+		nr_insnbuf = nr_repl;
+
+		if (nr_instr > nr_repl) {
+			add_nops(insnbuf + nr_repl, nr_instr - nr_repl);
+			nr_insnbuf += nr_instr - nr_repl;
+		}
+		DUMP_WORDS(insnbuf, nr_insnbuf, "%px: final_insn: ", instr);
+
+		text_poke_early(instr, insnbuf, nr_insnbuf);
+	}
+}
+
+void __init alternative_instructions(void)
+{
+	apply_alternatives(__alt_instructions, __alt_instructions_end);
+
+	alternatives_patched = 1;
+}