From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- arch/arm/lib/copy_template.S | 273 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 273 insertions(+) create mode 100644 arch/arm/lib/copy_template.S (limited to 'arch/arm/lib/copy_template.S') diff --git a/arch/arm/lib/copy_template.S b/arch/arm/lib/copy_template.S new file mode 100644 index 000000000..8fbafb074 --- /dev/null +++ b/arch/arm/lib/copy_template.S @@ -0,0 +1,273 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/arch/arm/lib/copy_template.s + * + * Code template for optimized memory copy functions + * + * Author: Nicolas Pitre + * Created: Sep 28, 2005 + * Copyright: MontaVista Software, Inc. + */ + +/* + * Theory of operation + * ------------------- + * + * This file provides the core code for a forward memory copy used in + * the implementation of memcopy(), copy_to_user() and copy_from_user(). + * + * The including file must define the following accessor macros + * according to the need of the given function: + * + * ldr1w ptr reg abort + * + * This loads one word from 'ptr', stores it in 'reg' and increments + * 'ptr' to the next word. The 'abort' argument is used for fixup tables. + * + * ldr4w ptr reg1 reg2 reg3 reg4 abort + * ldr8w ptr, reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort + * + * This loads four or eight words starting from 'ptr', stores them + * in provided registers and increments 'ptr' past those words. + * The'abort' argument is used for fixup tables. + * + * ldr1b ptr reg cond abort + * + * Similar to ldr1w, but it loads a byte and increments 'ptr' one byte. + * It also must apply the condition code if provided, otherwise the + * "al" condition is assumed by default. + * + * str1w ptr reg abort + * str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort + * str1b ptr reg cond abort + * + * Same as their ldr* counterparts, but data is stored to 'ptr' location + * rather than being loaded. + * + * enter reg1 reg2 + * + * Preserve the provided registers on the stack plus any additional + * data as needed by the implementation including this code. Called + * upon code entry. + * + * usave reg1 reg2 + * + * Unwind annotation macro is corresponding for 'enter' macro. + * It tell unwinder that preserved some provided registers on the stack + * and additional data by a prior 'enter' macro. + * + * exit reg1 reg2 + * + * Restore registers with the values previously saved with the + * 'preserv' macro. Called upon code termination. + * + * LDR1W_SHIFT + * STR1W_SHIFT + * + * Correction to be applied to the "ip" register when branching into + * the ldr1w or str1w instructions (some of these macros may expand to + * than one 32bit instruction in Thumb-2) + */ + + UNWIND( .fnstart ) + enter r4, UNWIND(fpreg,) lr + UNWIND( .setfp fpreg, sp ) + UNWIND( mov fpreg, sp ) + + subs r2, r2, #4 + blt 8f + ands ip, r0, #3 + PLD( pld [r1, #0] ) + bne 9f + ands ip, r1, #3 + bne 10f + +1: subs r2, r2, #(28) + stmfd sp!, {r5, r6, r8, r9} + blt 5f + + CALGN( ands ip, r0, #31 ) + CALGN( rsb r3, ip, #32 ) + CALGN( sbcsne r4, r3, r2 ) @ C is always set here + CALGN( bcs 2f ) + CALGN( adr r4, 6f ) + CALGN( subs r2, r2, r3 ) @ C gets set + CALGN( add pc, r4, ip ) + + PLD( pld [r1, #0] ) +2: PLD( subs r2, r2, #96 ) + PLD( pld [r1, #28] ) + PLD( blt 4f ) + PLD( pld [r1, #60] ) + PLD( pld [r1, #92] ) + +3: PLD( pld [r1, #124] ) +4: ldr8w r1, r3, r4, r5, r6, r8, r9, ip, lr, abort=20f + subs r2, r2, #32 + str8w r0, r3, r4, r5, r6, r8, r9, ip, lr, abort=20f + bge 3b + PLD( cmn r2, #96 ) + PLD( bge 4b ) + +5: ands ip, r2, #28 + rsb ip, ip, #32 +#if LDR1W_SHIFT > 0 + lsl ip, ip, #LDR1W_SHIFT +#endif + addne pc, pc, ip @ C is always clear here + b 7f +6: + .rept (1 << LDR1W_SHIFT) + W(nop) + .endr + ldr1w r1, r3, abort=20f + ldr1w r1, r4, abort=20f + ldr1w r1, r5, abort=20f + ldr1w r1, r6, abort=20f + ldr1w r1, r8, abort=20f + ldr1w r1, r9, abort=20f + ldr1w r1, lr, abort=20f + +#if LDR1W_SHIFT < STR1W_SHIFT + lsl ip, ip, #STR1W_SHIFT - LDR1W_SHIFT +#elif LDR1W_SHIFT > STR1W_SHIFT + lsr ip, ip, #LDR1W_SHIFT - STR1W_SHIFT +#endif + add pc, pc, ip + nop + .rept (1 << STR1W_SHIFT) + W(nop) + .endr + str1w r0, r3, abort=20f + str1w r0, r4, abort=20f + str1w r0, r5, abort=20f + str1w r0, r6, abort=20f + str1w r0, r8, abort=20f + str1w r0, r9, abort=20f + str1w r0, lr, abort=20f + + CALGN( bcs 2b ) + +7: ldmfd sp!, {r5, r6, r8, r9} + +8: movs r2, r2, lsl #31 + ldr1b r1, r3, ne, abort=21f + ldr1b r1, r4, cs, abort=21f + ldr1b r1, ip, cs, abort=21f + str1b r0, r3, ne, abort=21f + str1b r0, r4, cs, abort=21f + str1b r0, ip, cs, abort=21f + + exit r4, UNWIND(fpreg,) pc + +9: rsb ip, ip, #4 + cmp ip, #2 + ldr1b r1, r3, gt, abort=21f + ldr1b r1, r4, ge, abort=21f + ldr1b r1, lr, abort=21f + str1b r0, r3, gt, abort=21f + str1b r0, r4, ge, abort=21f + subs r2, r2, ip + str1b r0, lr, abort=21f + blt 8b + ands ip, r1, #3 + beq 1b + +10: bic r1, r1, #3 + cmp ip, #2 + ldr1w r1, lr, abort=21f + beq 17f + bgt 18f + + + .macro forward_copy_shift pull push + + subs r2, r2, #28 + blt 14f + + CALGN( ands ip, r0, #31 ) + CALGN( rsb ip, ip, #32 ) + CALGN( sbcsne r4, ip, r2 ) @ C is always set here + CALGN( subcc r2, r2, ip ) + CALGN( bcc 15f ) + +11: stmfd sp!, {r5, r6, r8 - r10} + + PLD( pld [r1, #0] ) + PLD( subs r2, r2, #96 ) + PLD( pld [r1, #28] ) + PLD( blt 13f ) + PLD( pld [r1, #60] ) + PLD( pld [r1, #92] ) + +12: PLD( pld [r1, #124] ) +13: ldr4w r1, r4, r5, r6, r8, abort=19f + mov r3, lr, lspull #\pull + subs r2, r2, #32 + ldr4w r1, r9, r10, ip, lr, abort=19f + orr r3, r3, r4, lspush #\push + mov r4, r4, lspull #\pull + orr r4, r4, r5, lspush #\push + mov r5, r5, lspull #\pull + orr r5, r5, r6, lspush #\push + mov r6, r6, lspull #\pull + orr r6, r6, r8, lspush #\push + mov r8, r8, lspull #\pull + orr r8, r8, r9, lspush #\push + mov r9, r9, lspull #\pull + orr r9, r9, r10, lspush #\push + mov r10, r10, lspull #\pull + orr r10, r10, ip, lspush #\push + mov ip, ip, lspull #\pull + orr ip, ip, lr, lspush #\push + str8w r0, r3, r4, r5, r6, r8, r9, r10, ip, abort=19f + bge 12b + PLD( cmn r2, #96 ) + PLD( bge 13b ) + + ldmfd sp!, {r5, r6, r8 - r10} + +14: ands ip, r2, #28 + beq 16f + +15: mov r3, lr, lspull #\pull + ldr1w r1, lr, abort=21f + subs ip, ip, #4 + orr r3, r3, lr, lspush #\push + str1w r0, r3, abort=21f + bgt 15b + CALGN( cmp r2, #0 ) + CALGN( bge 11b ) + +16: sub r1, r1, #(\push / 8) + b 8b + + .endm + + + forward_copy_shift pull=8 push=24 + +17: forward_copy_shift pull=16 push=16 + +18: forward_copy_shift pull=24 push=8 + + UNWIND( .fnend ) + +/* + * Abort preamble and completion macros. + * If a fixup handler is required then those macros must surround it. + * It is assumed that the fixup code will handle the private part of + * the exit macro. + */ + + .macro copy_abort_preamble +19: ldmfd sp!, {r5, r6, r8 - r10} + b 21f +20: ldmfd sp!, {r5, r6, r8, r9} +21: + .endm + + .macro copy_abort_end + ldmfd sp!, {r4, UNWIND(fpreg,) pc} + .endm + -- cgit v1.2.3