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/m68k/fpsp040/skeleton.S | 514 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 514 insertions(+) create mode 100644 arch/m68k/fpsp040/skeleton.S (limited to 'arch/m68k/fpsp040/skeleton.S') diff --git a/arch/m68k/fpsp040/skeleton.S b/arch/m68k/fpsp040/skeleton.S new file mode 100644 index 000000000..439395aa6 --- /dev/null +++ b/arch/m68k/fpsp040/skeleton.S @@ -0,0 +1,514 @@ +| +| skeleton.sa 3.2 4/26/91 +| +| This file contains code that is system dependent and will +| need to be modified to install the FPSP. +| +| Each entry point for exception 'xxxx' begins with a 'jmp fpsp_xxxx'. +| Put any target system specific handling that must be done immediately +| before the jump instruction. If there no handling necessary, then +| the 'fpsp_xxxx' handler entry point should be placed in the exception +| table so that the 'jmp' can be eliminated. If the FPSP determines that the +| exception is one that must be reported then there will be a +| return from the package by a 'jmp real_xxxx'. At that point +| the machine state will be identical to the state before +| the FPSP was entered. In particular, whatever condition +| that caused the exception will still be pending when the FPSP +| package returns. Thus, there will be system specific code +| to handle the exception. +| +| If the exception was completely handled by the package, then +| the return will be via a 'jmp fpsp_done'. Unless there is +| OS specific work to be done (such as handling a context switch or +| interrupt) the user program can be resumed via 'rte'. +| +| In the following skeleton code, some typical 'real_xxxx' handling +| code is shown. This code may need to be moved to an appropriate +| place in the target system, or rewritten. +| + +| Copyright (C) Motorola, Inc. 1990 +| All Rights Reserved +| +| For details on the license for this file, please see the +| file, README, in this same directory. + +| +| Modified for Linux-1.3.x by Jes Sorensen (jds@kom.auc.dk) +| + +#include +#include +#include + +|SKELETON idnt 2,1 | Motorola 040 Floating Point Software Package + + |section 15 +| +| The following counters are used for standalone testing +| + + |section 8 + +#include "fpsp.h" + + |xref b1238_fix + +| +| Divide by Zero exception +| +| All dz exceptions are 'real', hence no fpsp_dz entry point. +| + .global dz + .global real_dz +dz: +real_dz: + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E1,E_BYTE(%a6) + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Inexact exception +| +| All inexact exceptions are real, but the 'real' handler +| will probably want to clear the pending exception. +| The provided code will clear the E3 exception (if pending), +| otherwise clear the E1 exception. The frestore is not really +| necessary for E1 exceptions. +| +| Code following the 'inex' label is to handle bug #1232. In this +| bug, if an E1 snan, ovfl, or unfl occurred, and the process was +| swapped out before taking the exception, the exception taken on +| return was inex, rather than the correct exception. The snan, ovfl, +| and unfl exception to be taken must not have been enabled. The +| fix is to check for E1, and the existence of one of snan, ovfl, +| or unfl bits set in the fpsr. If any of these are set, branch +| to the appropriate handler for the exception in the fpsr. Note +| that this fix is only for d43b parts, and is skipped if the +| version number is not $40. +| +| + .global real_inex + .global inex +inex: + link %a6,#-LOCAL_SIZE + fsave -(%sp) + cmpib #VER_40,(%sp) |test version number + bnes not_fmt40 + fmovel %fpsr,-(%sp) + btstb #E1,E_BYTE(%a6) |test for E1 set + beqs not_b1232 + btstb #snan_bit,2(%sp) |test for snan + beq inex_ckofl + addl #4,%sp + frestore (%sp)+ + unlk %a6 + bra snan +inex_ckofl: + btstb #ovfl_bit,2(%sp) |test for ovfl + beq inex_ckufl + addl #4,%sp + frestore (%sp)+ + unlk %a6 + bra ovfl +inex_ckufl: + btstb #unfl_bit,2(%sp) |test for unfl + beq not_b1232 + addl #4,%sp + frestore (%sp)+ + unlk %a6 + bra unfl + +| +| We do not have the bug 1232 case. Clean up the stack and call +| real_inex. +| +not_b1232: + addl #4,%sp + frestore (%sp)+ + unlk %a6 + +real_inex: + + link %a6,#-LOCAL_SIZE + fsave -(%sp) +not_fmt40: + bclrb #E3,E_BYTE(%a6) |clear and test E3 flag + beqs inex_cke1 +| +| Clear dirty bit on dest resister in the frame before branching +| to b1238_fix. +| + moveml %d0/%d1,USER_DA(%a6) + bfextu CMDREG1B(%a6){#6:#3},%d0 |get dest reg no + bclrb %d0,FPR_DIRTY_BITS(%a6) |clr dest dirty bit + bsrl b1238_fix |test for bug1238 case + moveml USER_DA(%a6),%d0/%d1 + bras inex_done +inex_cke1: + bclrb #E1,E_BYTE(%a6) +inex_done: + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Overflow exception +| + |xref fpsp_ovfl + .global real_ovfl + .global ovfl +ovfl: + jmp fpsp_ovfl +real_ovfl: + + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E3,E_BYTE(%a6) |clear and test E3 flag + bnes ovfl_done + bclrb #E1,E_BYTE(%a6) +ovfl_done: + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Underflow exception +| + |xref fpsp_unfl + .global real_unfl + .global unfl +unfl: + jmp fpsp_unfl +real_unfl: + + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E3,E_BYTE(%a6) |clear and test E3 flag + bnes unfl_done + bclrb #E1,E_BYTE(%a6) +unfl_done: + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Signalling NAN exception +| + |xref fpsp_snan + .global real_snan + .global snan +snan: + jmp fpsp_snan +real_snan: + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E1,E_BYTE(%a6) |snan is always an E1 exception + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Operand Error exception +| + |xref fpsp_operr + .global real_operr + .global operr +operr: + jmp fpsp_operr +real_operr: + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E1,E_BYTE(%a6) |operr is always an E1 exception + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + + +| +| BSUN exception +| +| This sample handler simply clears the nan bit in the FPSR. +| + |xref fpsp_bsun + .global real_bsun + .global bsun +bsun: + jmp fpsp_bsun +real_bsun: + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E1,E_BYTE(%a6) |bsun is always an E1 exception + fmovel %FPSR,-(%sp) + bclrb #nan_bit,(%sp) + fmovel (%sp)+,%FPSR + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| F-line exception +| +| A 'real' F-line exception is one that the FPSP isn't supposed to +| handle. E.g. an instruction with a co-processor ID that is not 1. +| +| + |xref fpsp_fline + .global real_fline + .global fline +fline: + jmp fpsp_fline +real_fline: + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Unsupported data type exception +| + |xref fpsp_unsupp + .global real_unsupp + .global unsupp +unsupp: + jmp fpsp_unsupp +real_unsupp: + link %a6,#-LOCAL_SIZE + fsave -(%sp) + bclrb #E1,E_BYTE(%a6) |unsupp is always an E1 exception + frestore (%sp)+ + unlk %a6 + + SAVE_ALL_INT + GET_CURRENT(%d0) + movel %sp,%sp@- | stack frame pointer argument + bsrl trap_c + addql #4,%sp + bral ret_from_exception + +| +| Trace exception +| + .global real_trace +real_trace: + | + bral trap + +| +| fpsp_fmt_error --- exit point for frame format error +| +| The fpu stack frame does not match the frames existing +| or planned at the time of this writing. The fpsp is +| unable to handle frame sizes not in the following +| version:size pairs: +| +| {4060, 4160} - busy frame +| {4028, 4130} - unimp frame +| {4000, 4100} - idle frame +| +| This entry point simply holds an f-line illegal value. +| Replace this with a call to your kernel panic code or +| code to handle future revisions of the fpu. +| + .global fpsp_fmt_error +fpsp_fmt_error: + + .long 0xf27f0000 |f-line illegal + +| +| fpsp_done --- FPSP exit point +| +| The exception has been handled by the package and we are ready +| to return to user mode, but there may be OS specific code +| to execute before we do. If there is, do it now. +| +| + + .global fpsp_done +fpsp_done: + btst #0x5,%sp@ | supervisor bit set in saved SR? + beq .Lnotkern + rte +.Lnotkern: + SAVE_ALL_INT + GET_CURRENT(%d0) + | deliver signals, reschedule etc.. + jra ret_from_exception + +| +| mem_write --- write to user or supervisor address space +| +| Writes to memory while in supervisor mode. copyout accomplishes +| this via a 'moves' instruction. copyout is a UNIX SVR3 (and later) function. +| If you don't have copyout, use the local copy of the function below. +| +| a0 - supervisor source address +| a1 - user destination address +| d0 - number of bytes to write (maximum count is 12) +| +| The supervisor source address is guaranteed to point into the supervisor +| stack. The result is that a UNIX +| process is allowed to sleep as a consequence of a page fault during +| copyout. The probability of a page fault is exceedingly small because +| the 68040 always reads the destination address and thus the page +| faults should have already been handled. +| +| If the EXC_SR shows that the exception was from supervisor space, +| then just do a dumb (and slow) memory move. In a UNIX environment +| there shouldn't be any supervisor mode floating point exceptions. +| + .global mem_write +mem_write: + btstb #5,EXC_SR(%a6) |check for supervisor state + beqs user_write +super_write: + moveb (%a0)+,(%a1)+ + subql #1,%d0 + bnes super_write + rts +user_write: + movel %d1,-(%sp) |preserve d1 just in case + movel %d0,-(%sp) + movel %a1,-(%sp) + movel %a0,-(%sp) + jsr copyout + addw #12,%sp + movel (%sp)+,%d1 + rts +| +| mem_read --- read from user or supervisor address space +| +| Reads from memory while in supervisor mode. copyin accomplishes +| this via a 'moves' instruction. copyin is a UNIX SVR3 (and later) function. +| If you don't have copyin, use the local copy of the function below. +| +| The FPSP calls mem_read to read the original F-line instruction in order +| to extract the data register number when the 'Dn' addressing mode is +| used. +| +|Input: +| a0 - user source address +| a1 - supervisor destination address +| d0 - number of bytes to read (maximum count is 12) +| +| Like mem_write, mem_read always reads with a supervisor +| destination address on the supervisor stack. Also like mem_write, +| the EXC_SR is checked and a simple memory copy is done if reading +| from supervisor space is indicated. +| + .global mem_read +mem_read: + btstb #5,EXC_SR(%a6) |check for supervisor state + beqs user_read +super_read: + moveb (%a0)+,(%a1)+ + subql #1,%d0 + bnes super_read + rts +user_read: + movel %d1,-(%sp) |preserve d1 just in case + movel %d0,-(%sp) + movel %a1,-(%sp) + movel %a0,-(%sp) + jsr copyin + addw #12,%sp + movel (%sp)+,%d1 + rts + +| +| Use these routines if your kernel doesn't have copyout/copyin equivalents. +| Assumes that D0/D1/A0/A1 are scratch registers. copyout overwrites DFC, +| and copyin overwrites SFC. +| +copyout: + movel 4(%sp),%a0 | source + movel 8(%sp),%a1 | destination + movel 12(%sp),%d0 | count + subl #1,%d0 | dec count by 1 for dbra + movel #1,%d1 + +| DFC is already set +| movec %d1,%DFC | set dfc for user data space +moreout: + moveb (%a0)+,%d1 | fetch supervisor byte +out_ea: + movesb %d1,(%a1)+ | write user byte + dbf %d0,moreout + rts + +copyin: + movel 4(%sp),%a0 | source + movel 8(%sp),%a1 | destination + movel 12(%sp),%d0 | count + subl #1,%d0 | dec count by 1 for dbra + movel #1,%d1 +| SFC is already set +| movec %d1,%SFC | set sfc for user space +morein: +in_ea: + movesb (%a0)+,%d1 | fetch user byte + moveb %d1,(%a1)+ | write supervisor byte + dbf %d0,morein + rts + + .section .fixup,#alloc,#execinstr + .even +1: + jbsr fpsp040_die + jbra .Lnotkern + + .section __ex_table,#alloc + .align 4 + + .long in_ea,1b + .long out_ea,1b + + |end -- cgit v1.2.3