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_operr.S | 355 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 355 insertions(+) create mode 100644 arch/m68k/fpsp040/x_operr.S (limited to 'arch/m68k/fpsp040/x_operr.S') diff --git a/arch/m68k/fpsp040/x_operr.S b/arch/m68k/fpsp040/x_operr.S new file mode 100644 index 000000000..e2c371c3a --- /dev/null +++ b/arch/m68k/fpsp040/x_operr.S @@ -0,0 +1,355 @@ +| +| x_operr.sa 3.5 7/1/91 +| +| fpsp_operr --- FPSP handler for operand error exception +| +| See 68040 User's Manual pp. 9-44f +| +| Note 1: For trap disabled 040 does the following: +| If the dest is a fp reg, then an extended precision non_signaling +| NAN is stored in the dest reg. If the dest format is b, w, or l and +| the source op is a NAN, then garbage is stored as the result (actually +| the upper 32 bits of the mantissa are sent to the integer unit). If +| the dest format is integer (b, w, l) and the operr is caused by +| integer overflow, or the source op is inf, then the result stored is +| garbage. +| There are three cases in which operr is incorrectly signaled on the +| 040. This occurs for move_out of format b, w, or l for the largest +| negative integer (-2^7 for b, -2^15 for w, -2^31 for l). +| +| On opclass = 011 fmove.(b,w,l) that causes a conversion +| overflow -> OPERR, the exponent in wbte (and fpte) is: +| byte 56 - (62 - exp) +| word 48 - (62 - exp) +| long 32 - (62 - exp) +| +| where exp = (true exp) - 1 +| +| So, wbtemp and fptemp will contain the following on erroneously +| signalled operr: +| fpts = 1 +| fpte = $4000 (15 bit externally) +| byte fptm = $ffffffff ffffff80 +| word fptm = $ffffffff ffff8000 +| long fptm = $ffffffff 80000000 +| +| Note 2: For trap enabled 040 does the following: +| If the inst is move_out, then same as Note 1. +| If the inst is not move_out, the dest is not modified. +| The exceptional operand is not defined for integer overflow +| during a move_out. +| + +| 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_OPERR: |idnt 2,1 | Motorola 040 Floating Point Software Package + + |section 8 + +#include "fpsp.h" + + |xref mem_write + |xref real_operr + |xref real_inex + |xref get_fline + |xref fpsp_done + |xref reg_dest + + .global fpsp_operr +fpsp_operr: +| + 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) + +| +| Check if this is an opclass 3 instruction. +| If so, fall through, else branch to operr_end +| + btstb #TFLAG,T_BYTE(%a6) + beqs operr_end + +| +| If the destination size is B,W,or L, the operr must be +| handled here. +| + movel CMDREG1B(%a6),%d0 + bfextu %d0{#3:#3},%d0 |0=long, 4=word, 6=byte + cmpib #0,%d0 |determine size; check long + beq operr_long + cmpib #4,%d0 |check word + beq operr_word + cmpib #6,%d0 |check byte + beq operr_byte + +| +| The size is not B,W,or L, so the operr is handled by the +| kernel handler. Set the operr bits and clean up, leaving +| only the integer exception frame on the stack, and the +| fpu in the original exceptional state. +| +operr_end: + bsetb #operr_bit,FPSR_EXCEPT(%a6) + bsetb #aiop_bit,FPSR_AEXCEPT(%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_operr + +operr_long: + moveql #4,%d1 |write size to d1 + moveb STAG(%a6),%d0 |test stag for nan + andib #0xe0,%d0 |clr all but tag + cmpib #0x60,%d0 |check for nan + beq operr_nan + cmpil #0x80000000,FPTEMP_LO(%a6) |test if ls lword is special + bnes chklerr |if not equal, check for incorrect operr + bsr check_upper |check if exp and ms mant are special + tstl %d0 + bnes chklerr |if d0 is true, check for incorrect operr + movel #0x80000000,%d0 |store special case result + bsr operr_store + bra not_enabled |clean and exit +| +| CHECK FOR INCORRECTLY GENERATED OPERR EXCEPTION HERE +| +chklerr: + movew FPTEMP_EX(%a6),%d0 + andw #0x7FFF,%d0 |ignore sign bit + cmpw #0x3FFE,%d0 |this is the only possible exponent value + bnes chklerr2 +fixlong: + movel FPTEMP_LO(%a6),%d0 + bsr operr_store + bra not_enabled +chklerr2: + movew FPTEMP_EX(%a6),%d0 + andw #0x7FFF,%d0 |ignore sign bit + cmpw #0x4000,%d0 + bcc store_max |exponent out of range + + movel FPTEMP_LO(%a6),%d0 + andl #0x7FFF0000,%d0 |look for all 1's on bits 30-16 + cmpl #0x7FFF0000,%d0 + beqs fixlong + + tstl FPTEMP_LO(%a6) + bpls chklepos + cmpl #0xFFFFFFFF,FPTEMP_HI(%a6) + beqs fixlong + bra store_max +chklepos: + tstl FPTEMP_HI(%a6) + beqs fixlong + bra store_max + +operr_word: + moveql #2,%d1 |write size to d1 + moveb STAG(%a6),%d0 |test stag for nan + andib #0xe0,%d0 |clr all but tag + cmpib #0x60,%d0 |check for nan + beq operr_nan + cmpil #0xffff8000,FPTEMP_LO(%a6) |test if ls lword is special + bnes chkwerr |if not equal, check for incorrect operr + bsr check_upper |check if exp and ms mant are special + tstl %d0 + bnes chkwerr |if d0 is true, check for incorrect operr + movel #0x80000000,%d0 |store special case result + bsr operr_store + bra not_enabled |clean and exit +| +| CHECK FOR INCORRECTLY GENERATED OPERR EXCEPTION HERE +| +chkwerr: + movew FPTEMP_EX(%a6),%d0 + andw #0x7FFF,%d0 |ignore sign bit + cmpw #0x3FFE,%d0 |this is the only possible exponent value + bnes store_max + movel FPTEMP_LO(%a6),%d0 + swap %d0 + bsr operr_store + bra not_enabled + +operr_byte: + moveql #1,%d1 |write size to d1 + moveb STAG(%a6),%d0 |test stag for nan + andib #0xe0,%d0 |clr all but tag + cmpib #0x60,%d0 |check for nan + beqs operr_nan + cmpil #0xffffff80,FPTEMP_LO(%a6) |test if ls lword is special + bnes chkberr |if not equal, check for incorrect operr + bsr check_upper |check if exp and ms mant are special + tstl %d0 + bnes chkberr |if d0 is true, check for incorrect operr + movel #0x80000000,%d0 |store special case result + bsr operr_store + bra not_enabled |clean and exit +| +| CHECK FOR INCORRECTLY GENERATED OPERR EXCEPTION HERE +| +chkberr: + movew FPTEMP_EX(%a6),%d0 + andw #0x7FFF,%d0 |ignore sign bit + cmpw #0x3FFE,%d0 |this is the only possible exponent value + bnes store_max + movel FPTEMP_LO(%a6),%d0 + asll #8,%d0 + swap %d0 + bsr operr_store + bra not_enabled + +| +| This operr condition is not of the special case. Set operr +| and aiop and write the portion of the nan to memory for the +| given size. +| +operr_nan: + orl #opaop_mask,USER_FPSR(%a6) |set operr & aiop + + movel ETEMP_HI(%a6),%d0 |output will be from upper 32 bits + bsr operr_store + bra end_operr +| +| Store_max loads the max pos or negative for the size, sets +| the operr and aiop bits, and clears inex and ainex, incorrectly +| set by the 040. +| +store_max: + orl #opaop_mask,USER_FPSR(%a6) |set operr & aiop + bclrb #inex2_bit,FPSR_EXCEPT(%a6) + bclrb #ainex_bit,FPSR_AEXCEPT(%a6) + fmovel #0,%FPSR + + tstw FPTEMP_EX(%a6) |check sign + blts load_neg + movel #0x7fffffff,%d0 + bsr operr_store + bra end_operr +load_neg: + movel #0x80000000,%d0 + bsr operr_store + bra end_operr + +| +| This routine stores the data in d0, for the given size in d1, +| to memory or data register as required. A read of the fline +| is required to determine the destination. +| +operr_store: + movel %d0,L_SCR1(%a6) |move write data to L_SCR1 + movel %d1,-(%a7) |save register size + bsrl get_fline |fline returned in d0 + movel (%a7)+,%d1 + bftst %d0{#26:#3} |if mode is zero, dest is Dn + bnes dest_mem +| +| Destination is Dn. Get register number from d0. Data is on +| the stack at (a7). D1 has size: 1=byte,2=word,4=long/single +| + andil #7,%d0 |isolate register number + cmpil #4,%d1 + beqs op_long |the most frequent case + cmpil #2,%d1 + bnes op_con + orl #8,%d0 + bras op_con +op_long: + orl #0x10,%d0 +op_con: + movel %d0,%d1 |format size:reg for reg_dest + bral reg_dest |call to reg_dest returns to caller +| ;of operr_store +| +| Destination is memory. Get from integer exception frame +| and call mem_write. +| +dest_mem: + leal L_SCR1(%a6),%a0 |put ptr to write data in a0 + movel EXC_EA(%a6),%a1 |put user destination address in a1 + movel %d1,%d0 |put size in d0 + bsrl mem_write + rts +| +| Check the exponent for $c000 and the upper 32 bits of the +| mantissa for $ffffffff. If both are true, return d0 clr +| and store the lower n bits of the least lword of FPTEMP +| to d0 for write out. If not, it is a real operr, and set d0. +| +check_upper: + cmpil #0xffffffff,FPTEMP_HI(%a6) |check if first byte is all 1's + bnes true_operr |if not all 1's then was true operr + cmpiw #0xc000,FPTEMP_EX(%a6) |check if incorrectly signalled + beqs not_true_operr |branch if not true operr + cmpiw #0xbfff,FPTEMP_EX(%a6) |check if incorrectly signalled + beqs not_true_operr |branch if not true operr +true_operr: + movel #1,%d0 |signal real operr + rts +not_true_operr: + clrl %d0 |signal no real operr + rts + +| +| End_operr tests for operr enabled. If not, it cleans up the stack +| and does an rte. If enabled, it cleans up the stack and branches +| to the kernel operr handler with only the integer exception +| frame on the stack and the fpu in the original exceptional state +| with correct data written to the destination. +| +end_operr: + btstb #operr_bit,FPCR_ENABLE(%a6) + beqs not_enabled +enabled: + 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_operr + +not_enabled: +| +| It is possible to have either inex2 or inex1 exceptions with the +| operr. 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 + beq operr_exit +| +| Inexact enabled and reported, and we must take an inexact exception. +| +take_inex: + moveb #INEX_VEC,EXC_VEC+1(%a6) + 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 real_inex +| +| Since operr is only an E1 exception, there is no need to frestore +| any state back to the fpu. +| +operr_exit: + 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 + + |end -- cgit v1.2.3