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/x_unfl.S | 268 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 268 insertions(+) create mode 100644 arch/m68k/fpsp040/x_unfl.S (limited to 'arch/m68k/fpsp040/x_unfl.S') diff --git a/arch/m68k/fpsp040/x_unfl.S b/arch/m68k/fpsp040/x_unfl.S new file mode 100644 index 000000000..eb772ff3b --- /dev/null +++ b/arch/m68k/fpsp040/x_unfl.S @@ -0,0 +1,268 @@ +| +| x_unfl.sa 3.4 7/1/91 +| +| fpsp_unfl --- FPSP handler for underflow exception +| +| Trap disabled results +| For 881/2 compatibility, sw must denormalize the intermediate +| result, then store the result. Denormalization is accomplished +| by taking the intermediate result (which is always normalized) and +| shifting the mantissa right while incrementing the exponent until +| it is equal to the denormalized exponent for the destination +| format. After denormalization, the result is rounded to the +| destination format. +| +| Trap enabled results +| All trap disabled code applies. In addition the exceptional +| operand needs to made available to the user with a bias of $6000 +| added to the exponent. +| + +| 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. + +X_UNFL: |idnt 2,1 | Motorola 040 Floating Point Software Package + + |section 8 + +#include "fpsp.h" + + |xref denorm + |xref round + |xref store + |xref g_rndpr + |xref g_opcls + |xref g_dfmtou + |xref real_unfl + |xref real_inex + |xref fpsp_done + |xref b1238_fix + + .global fpsp_unfl +fpsp_unfl: + link %a6,#-LOCAL_SIZE + fsave -(%a7) + moveml %d0-%d1/%a0-%a1,USER_DA(%a6) + fmovemx %fp0-%fp3,USER_FP0(%a6) + fmoveml %fpcr/%fpsr/%fpiar,USER_FPCR(%a6) + +| + bsrl unf_res |denormalize, round & store interm op +| +| If underflow exceptions are not enabled, check for inexact +| exception +| + btstb #unfl_bit,FPCR_ENABLE(%a6) + beqs ck_inex + + btstb #E3,E_BYTE(%a6) + beqs no_e3_1 +| +| Clear dirty bit on dest resister in the frame before branching +| to b1238_fix. +| + bfextu CMDREG3B(%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 + movel USER_FPSR(%a6),FPSR_SHADOW(%a6) + orl #sx_mask,E_BYTE(%a6) +no_e3_1: + moveml USER_DA(%a6),%d0-%d1/%a0-%a1 + fmovemx USER_FP0(%a6),%fp0-%fp3 + fmoveml USER_FPCR(%a6),%fpcr/%fpsr/%fpiar + frestore (%a7)+ + unlk %a6 + bral real_unfl +| +| It is possible to have either inex2 or inex1 exceptions with the +| unfl. If the inex enable bit is set in the FPCR, and either +| inex2 or inex1 occurred, we must clean up and branch to the +| real inex handler. +| +ck_inex: + moveb FPCR_ENABLE(%a6),%d0 + andb FPSR_EXCEPT(%a6),%d0 + andib #0x3,%d0 + beqs unfl_done + +| +| Inexact enabled and reported, and we must take an inexact exception +| +take_inex: + btstb #E3,E_BYTE(%a6) + beqs no_e3_2 +| +| Clear dirty bit on dest resister in the frame before branching +| to b1238_fix. +| + bfextu CMDREG3B(%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 + movel USER_FPSR(%a6),FPSR_SHADOW(%a6) + orl #sx_mask,E_BYTE(%a6) +no_e3_2: + moveb #INEX_VEC,EXC_VEC+1(%a6) + moveml USER_DA(%a6),%d0-%d1/%a0-%a1 + fmovemx USER_FP0(%a6),%fp0-%fp3 + fmoveml USER_FPCR(%a6),%fpcr/%fpsr/%fpiar + frestore (%a7)+ + unlk %a6 + bral real_inex + +unfl_done: + bclrb #E3,E_BYTE(%a6) + beqs e1_set |if set then branch +| +| Clear dirty bit on dest resister in the frame before branching +| to b1238_fix. +| + bfextu CMDREG3B(%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 + movel USER_FPSR(%a6),FPSR_SHADOW(%a6) + orl #sx_mask,E_BYTE(%a6) + moveml USER_DA(%a6),%d0-%d1/%a0-%a1 + fmovemx USER_FP0(%a6),%fp0-%fp3 + fmoveml USER_FPCR(%a6),%fpcr/%fpsr/%fpiar + frestore (%a7)+ + unlk %a6 + bral fpsp_done +e1_set: + moveml USER_DA(%a6),%d0-%d1/%a0-%a1 + fmovemx USER_FP0(%a6),%fp0-%fp3 + fmoveml USER_FPCR(%a6),%fpcr/%fpsr/%fpiar + unlk %a6 + bral fpsp_done +| +| unf_res --- underflow result calculation +| +unf_res: + bsrl g_rndpr |returns RND_PREC in d0 0=ext, +| ;1=sgl, 2=dbl +| ;we need the RND_PREC in the +| ;upper word for round + movew #0,-(%a7) + movew %d0,-(%a7) |copy RND_PREC to stack +| +| +| If the exception bit set is E3, the exceptional operand from the +| fpu is in WBTEMP; else it is in FPTEMP. +| + btstb #E3,E_BYTE(%a6) + beqs unf_E1 +unf_E3: + lea WBTEMP(%a6),%a0 |a0 now points to operand +| +| Test for fsgldiv and fsglmul. If the inst was one of these, then +| force the precision to extended for the denorm routine. Use +| the user's precision for the round routine. +| + movew CMDREG3B(%a6),%d1 |check for fsgldiv or fsglmul + andiw #0x7f,%d1 + cmpiw #0x30,%d1 |check for sgldiv + beqs unf_sgl + cmpiw #0x33,%d1 |check for sglmul + bnes unf_cont |if not, use fpcr prec in round +unf_sgl: + clrl %d0 + movew #0x1,(%a7) |override g_rndpr precision +| ;force single + bras unf_cont +unf_E1: + lea FPTEMP(%a6),%a0 |a0 now points to operand +unf_cont: + bclrb #sign_bit,LOCAL_EX(%a0) |clear sign bit + sne LOCAL_SGN(%a0) |store sign + + bsrl denorm |returns denorm, a0 points to it +| +| WARNING: +| ;d0 has guard,round sticky bit +| ;make sure that it is not corrupted +| ;before it reaches the round subroutine +| ;also ensure that a0 isn't corrupted + +| +| Set up d1 for round subroutine d1 contains the PREC/MODE +| information respectively on upper/lower register halves. +| + bfextu FPCR_MODE(%a6){#2:#2},%d1 |get mode from FPCR +| ;mode in lower d1 + addl (%a7)+,%d1 |merge PREC/MODE +| +| WARNING: a0 and d0 are assumed to be intact between the denorm and +| round subroutines. All code between these two subroutines +| must not corrupt a0 and d0. +| +| +| Perform Round +| Input: a0 points to input operand +| d0{31:29} has guard, round, sticky +| d1{01:00} has rounding mode +| d1{17:16} has rounding precision +| Output: a0 points to rounded operand +| + + bsrl round |returns rounded denorm at (a0) +| +| Differentiate between store to memory vs. store to register +| +unf_store: + bsrl g_opcls |returns opclass in d0{2:0} + cmpib #0x3,%d0 + bnes not_opc011 +| +| At this point, a store to memory is pending +| +opc011: + bsrl g_dfmtou + tstb %d0 + beqs ext_opc011 |If extended, do not subtract +| ;If destination format is sgl/dbl, + tstb LOCAL_HI(%a0) |If rounded result is normal,don't +| ;subtract + bmis ext_opc011 + subqw #1,LOCAL_EX(%a0) |account for denorm bias vs. +| ;normalized bias +| ; normalized denormalized +| ;single $7f $7e +| ;double $3ff $3fe +| +ext_opc011: + bsrl store |stores to memory + bras unf_done |finish up + +| +| At this point, a store to a float register is pending +| +not_opc011: + bsrl store |stores to float register +| ;a0 is not corrupted on a store to a +| ;float register. +| +| Set the condition codes according to result +| + tstl LOCAL_HI(%a0) |check upper mantissa + bnes ck_sgn + tstl LOCAL_LO(%a0) |check lower mantissa + bnes ck_sgn + bsetb #z_bit,FPSR_CC(%a6) |set condition codes if zero +ck_sgn: + btstb #sign_bit,LOCAL_EX(%a0) |check the sign bit + beqs unf_done + bsetb #neg_bit,FPSR_CC(%a6) + +| +| Finish. +| +unf_done: + btstb #inex2_bit,FPSR_EXCEPT(%a6) + beqs no_aunfl + bsetb #aunfl_bit,FPSR_AEXCEPT(%a6) +no_aunfl: + rts + + |end -- cgit v1.2.3