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, 495 insertions, 0 deletions

diff --git a/arch/m68k/fpsp040/bugfix.S b/arch/m68k/fpsp040/bugfix.S
new file mode 100644
index 000000000..3bb9c84bb
--- /dev/null
+++ b/arch/m68k/fpsp040/bugfix.S
@@ -0,0 +1,495 @@
+|
+|	bugfix.sa 3.2 1/31/91
+|
+|
+|	This file contains workarounds for bugs in the 040
+|	relating to the Floating-Point Software Package (FPSP)
+|
+|	Fixes for bugs: 1238
+|
+|	Bug: 1238
+|
+|
+|    /* The following dirty_bit clear should be left in
+|     * the handler permanently to improve throughput.
+|     * The dirty_bits are located at bits [23:16] in
+|     * longword $08 in the busy frame $4x60.  Bit 16
+|     * corresponds to FP0, bit 17 corresponds to FP1,
+|     * and so on.
+|     */
+|    if  (E3_exception_just_serviced)   {
+|         dirty_bit[cmdreg3b[9:7]] = 0;
+|         }
+|
+|    if  (fsave_format_version != $40)  {goto NOFIX}
+|
+|    if !(E3_exception_just_serviced)   {goto NOFIX}
+|    if  (cupc == 0000000)              {goto NOFIX}
+|    if  ((cmdreg1b[15:13] != 000) &&
+|         (cmdreg1b[15:10] != 010001))  {goto NOFIX}
+|    if (((cmdreg1b[15:13] != 000) || ((cmdreg1b[12:10] != cmdreg2b[9:7]) &&
+|				      (cmdreg1b[12:10] != cmdreg3b[9:7]))  ) &&
+|	 ((cmdreg1b[ 9: 7] != cmdreg2b[9:7]) &&
+|	  (cmdreg1b[ 9: 7] != cmdreg3b[9:7])) )  {goto NOFIX}
+|
+|    /* Note: for 6d43b or 8d43b, you may want to add the following code
+|     * to get better coverage.  (If you do not insert this code, the part
+|     * won't lock up; it will simply get the wrong answer.)
+|     * Do NOT insert this code for 10d43b or later parts.
+|     *
+|     *  if (fpiarcu == integer stack return address) {
+|     *       cupc = 0000000;
+|     *       goto NOFIX;
+|     *       }
+|     */
+|
+|    if (cmdreg1b[15:13] != 000)   {goto FIX_OPCLASS2}
+|    FIX_OPCLASS0:
+|    if (((cmdreg1b[12:10] == cmdreg2b[9:7]) ||
+|	 (cmdreg1b[ 9: 7] == cmdreg2b[9:7])) &&
+|	(cmdreg1b[12:10] != cmdreg3b[9:7]) &&
+|	(cmdreg1b[ 9: 7] != cmdreg3b[9:7]))  {  /* xu conflict only */
+|	/* We execute the following code if there is an
+|	   xu conflict and NOT an nu conflict */
+|
+|	/* first save some values on the fsave frame */
+|	stag_temp     = STAG[fsave_frame];
+|	cmdreg1b_temp = CMDREG1B[fsave_frame];
+|	dtag_temp     = DTAG[fsave_frame];
+|	ete15_temp    = ETE15[fsave_frame];
+|
+|	CUPC[fsave_frame] = 0000000;
+|	FRESTORE
+|	FSAVE
+|
+|	/* If the xu instruction is exceptional, we punt.
+|	 * Otherwise, we would have to include OVFL/UNFL handler
+|	 * code here to get the correct answer.
+|	 */
+|	if (fsave_frame_format == $4060) {goto KILL_PROCESS}
+|
+|	fsave_frame = /* build a long frame of all zeros */
+|	fsave_frame_format = $4060;  /* label it as long frame */
+|
+|	/* load it with the temps we saved */
+|	STAG[fsave_frame]     =  stag_temp;
+|	CMDREG1B[fsave_frame] =  cmdreg1b_temp;
+|	DTAG[fsave_frame]     =  dtag_temp;
+|	ETE15[fsave_frame]    =  ete15_temp;
+|
+|	/* Make sure that the cmdreg3b dest reg is not going to
+|	 * be destroyed by a FMOVEM at the end of all this code.
+|	 * If it is, you should move the current value of the reg
+|	 * onto the stack so that the reg will loaded with that value.
+|	 */
+|
+|	/* All done.  Proceed with the code below */
+|    }
+|
+|    etemp  = FP_reg_[cmdreg1b[12:10]];
+|    ete15  = ~ete14;
+|    cmdreg1b[15:10] = 010010;
+|    clear(bug_flag_procIDxxxx);
+|    FRESTORE and return;
+|
+|
+|    FIX_OPCLASS2:
+|    if ((cmdreg1b[9:7] == cmdreg2b[9:7]) &&
+|	(cmdreg1b[9:7] != cmdreg3b[9:7]))  {  /* xu conflict only */
+|	/* We execute the following code if there is an
+|	   xu conflict and NOT an nu conflict */
+|
+|	/* first save some values on the fsave frame */
+|	stag_temp     = STAG[fsave_frame];
+|	cmdreg1b_temp = CMDREG1B[fsave_frame];
+|	dtag_temp     = DTAG[fsave_frame];
+|	ete15_temp    = ETE15[fsave_frame];
+|	etemp_temp    = ETEMP[fsave_frame];
+|
+|	CUPC[fsave_frame] = 0000000;
+|	FRESTORE
+|	FSAVE
+|
+|
+|	/* If the xu instruction is exceptional, we punt.
+|	 * Otherwise, we would have to include OVFL/UNFL handler
+|	 * code here to get the correct answer.
+|	 */
+|	if (fsave_frame_format == $4060) {goto KILL_PROCESS}
+|
+|	fsave_frame = /* build a long frame of all zeros */
+|	fsave_frame_format = $4060;  /* label it as long frame */
+|
+|	/* load it with the temps we saved */
+|	STAG[fsave_frame]     =  stag_temp;
+|	CMDREG1B[fsave_frame] =  cmdreg1b_temp;
+|	DTAG[fsave_frame]     =  dtag_temp;
+|	ETE15[fsave_frame]    =  ete15_temp;
+|	ETEMP[fsave_frame]    =  etemp_temp;
+|
+|	/* Make sure that the cmdreg3b dest reg is not going to
+|	 * be destroyed by a FMOVEM at the end of all this code.
+|	 * If it is, you should move the current value of the reg
+|	 * onto the stack so that the reg will loaded with that value.
+|	 */
+|
+|	/* All done.  Proceed with the code below */
+|    }
+|
+|    if (etemp_exponent == min_sgl)   etemp_exponent = min_dbl;
+|    if (etemp_exponent == max_sgl)   etemp_exponent = max_dbl;
+|    cmdreg1b[15:10] = 010101;
+|    clear(bug_flag_procIDxxxx);
+|    FRESTORE and return;
+|
+|
+|    NOFIX:
+|    clear(bug_flag_procIDxxxx);
+|    FRESTORE and return;
+|
+
+
+|		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.
+
+|BUGFIX    idnt    2,1 | Motorola 040 Floating Point Software Package
+
+	|section	8
+
+#include "fpsp.h"
+
+	|xref	fpsp_fmt_error
+
+	.global	b1238_fix
+b1238_fix:
+|
+| This code is entered only on completion of the handling of an
+| nu-generated ovfl, unfl, or inex exception.  If the version
+| number of the fsave is not $40, this handler is not necessary.
+| Simply branch to fix_done and exit normally.
+|
+	cmpib	#VER_40,4(%a7)
+	bne	fix_done
+|
+| Test for cu_savepc equal to zero.  If not, this is not a bug
+| #1238 case.
+|
+	moveb	CU_SAVEPC(%a6),%d0
+	andib	#0xFE,%d0
+	beq	fix_done	|if zero, this is not bug #1238
+
+|
+| Test the register conflict aspect.  If opclass0, check for
+| cu src equal to xu dest or equal to nu dest.  If so, go to
+| op0.  Else, or if opclass2, check for cu dest equal to
+| xu dest or equal to nu dest.  If so, go to tst_opcl.  Else,
+| exit, it is not the bug case.
+|
+| Check for opclass 0.  If not, go and check for opclass 2 and sgl.
+|
+	movew	CMDREG1B(%a6),%d0
+	andiw	#0xE000,%d0		|strip all but opclass
+	bne	op2sgl			|not opclass 0, check op2
+|
+| Check for cu and nu register conflict.  If one exists, this takes
+| priority over a cu and xu conflict.
+|
+	bfextu	CMDREG1B(%a6){#3:#3},%d0	|get 1st src
+	bfextu	CMDREG3B(%a6){#6:#3},%d1	|get 3rd dest
+	cmpb	%d0,%d1
+	beqs	op0			|if equal, continue bugfix
+|
+| Check for cu dest equal to nu dest.  If so, go and fix the
+| bug condition.  Otherwise, exit.
+|
+	bfextu	CMDREG1B(%a6){#6:#3},%d0	|get 1st dest
+	cmpb	%d0,%d1			|cmp 1st dest with 3rd dest
+	beqs	op0			|if equal, continue bugfix
+|
+| Check for cu and xu register conflict.
+|
+	bfextu	CMDREG2B(%a6){#6:#3},%d1	|get 2nd dest
+	cmpb	%d0,%d1			|cmp 1st dest with 2nd dest
+	beqs	op0_xu			|if equal, continue bugfix
+	bfextu	CMDREG1B(%a6){#3:#3},%d0	|get 1st src
+	cmpb	%d0,%d1			|cmp 1st src with 2nd dest
+	beq	op0_xu
+	bne	fix_done		|if the reg checks fail, exit
+|
+| We have the opclass 0 situation.
+|
+op0:
+	bfextu	CMDREG1B(%a6){#3:#3},%d0	|get source register no
+	movel	#7,%d1
+	subl	%d0,%d1
+	clrl	%d0
+	bsetl	%d1,%d0
+	fmovemx %d0,ETEMP(%a6)		|load source to ETEMP
+
+	moveb	#0x12,%d0
+	bfins	%d0,CMDREG1B(%a6){#0:#6}	|opclass 2, extended
+|
+|	Set ETEMP exponent bit 15 as the opposite of ete14
+|
+	btst	#6,ETEMP_EX(%a6)		|check etemp exponent bit 14
+	beq	setete15
+	bclr	#etemp15_bit,STAG(%a6)
+	bra	finish
+setete15:
+	bset	#etemp15_bit,STAG(%a6)
+	bra	finish
+
+|
+| We have the case in which a conflict exists between the cu src or
+| dest and the dest of the xu.  We must clear the instruction in
+| the cu and restore the state, allowing the instruction in the
+| xu to complete.  Remember, the instruction in the nu
+| was exceptional, and was completed by the appropriate handler.
+| If the result of the xu instruction is not exceptional, we can
+| restore the instruction from the cu to the frame and continue
+| processing the original exception.  If the result is also
+| exceptional, we choose to kill the process.
+|
+|	Items saved from the stack:
+|
+|		$3c stag     - L_SCR1
+|		$40 cmdreg1b - L_SCR2
+|		$44 dtag     - L_SCR3
+|
+| The cu savepc is set to zero, and the frame is restored to the
+| fpu.
+|
+op0_xu:
+	movel	STAG(%a6),L_SCR1(%a6)
+	movel	CMDREG1B(%a6),L_SCR2(%a6)
+	movel	DTAG(%a6),L_SCR3(%a6)
+	andil	#0xe0000000,L_SCR3(%a6)
+	moveb	#0,CU_SAVEPC(%a6)
+	movel	(%a7)+,%d1		|save return address from bsr
+	frestore (%a7)+
+	fsave	-(%a7)
+|
+| Check if the instruction which just completed was exceptional.
+|
+	cmpw	#0x4060,(%a7)
+	beq	op0_xb
+|
+| It is necessary to isolate the result of the instruction in the
+| xu if it is to fp0 - fp3 and write that value to the USER_FPn
+| locations on the stack.  The correct destination register is in
+| cmdreg2b.
+|
+	bfextu	CMDREG2B(%a6){#6:#3},%d0	|get dest register no
+	cmpil	#3,%d0
+	bgts	op0_xi
+	beqs	op0_fp3
+	cmpil	#1,%d0
+	blts	op0_fp0
+	beqs	op0_fp1
+op0_fp2:
+	fmovemx %fp2-%fp2,USER_FP2(%a6)
+	bras	op0_xi
+op0_fp1:
+	fmovemx %fp1-%fp1,USER_FP1(%a6)
+	bras	op0_xi
+op0_fp0:
+	fmovemx %fp0-%fp0,USER_FP0(%a6)
+	bras	op0_xi
+op0_fp3:
+	fmovemx %fp3-%fp3,USER_FP3(%a6)
+|
+| The frame returned is idle.  We must build a busy frame to hold
+| the cu state information and setup etemp.
+|
+op0_xi:
+	movel	#22,%d0		|clear 23 lwords
+	clrl	(%a7)
+op0_loop:
+	clrl	-(%a7)
+	dbf	%d0,op0_loop
+	movel	#0x40600000,-(%a7)
+	movel	L_SCR1(%a6),STAG(%a6)
+	movel	L_SCR2(%a6),CMDREG1B(%a6)
+	movel	L_SCR3(%a6),DTAG(%a6)
+	moveb	#0x6,CU_SAVEPC(%a6)
+	movel	%d1,-(%a7)		|return bsr return address
+	bfextu	CMDREG1B(%a6){#3:#3},%d0	|get source register no
+	movel	#7,%d1
+	subl	%d0,%d1
+	clrl	%d0
+	bsetl	%d1,%d0
+	fmovemx %d0,ETEMP(%a6)		|load source to ETEMP
+
+	moveb	#0x12,%d0
+	bfins	%d0,CMDREG1B(%a6){#0:#6}	|opclass 2, extended
+|
+|	Set ETEMP exponent bit 15 as the opposite of ete14
+|
+	btst	#6,ETEMP_EX(%a6)		|check etemp exponent bit 14
+	beq	op0_sete15
+	bclr	#etemp15_bit,STAG(%a6)
+	bra	finish
+op0_sete15:
+	bset	#etemp15_bit,STAG(%a6)
+	bra	finish
+
+|
+| The frame returned is busy.  It is not possible to reconstruct
+| the code sequence to allow completion.  We will jump to
+| fpsp_fmt_error and allow the kernel to kill the process.
+|
+op0_xb:
+	jmp	fpsp_fmt_error
+
+|
+| Check for opclass 2 and single size.  If not both, exit.
+|
+op2sgl:
+	movew	CMDREG1B(%a6),%d0
+	andiw	#0xFC00,%d0		|strip all but opclass and size
+	cmpiw	#0x4400,%d0		|test for opclass 2 and size=sgl
+	bne	fix_done		|if not, it is not bug 1238
+|
+| Check for cu dest equal to nu dest or equal to xu dest, with
+| a cu and nu conflict taking priority an nu conflict.  If either,
+| go and fix the bug condition.  Otherwise, exit.
+|
+	bfextu	CMDREG1B(%a6){#6:#3},%d0	|get 1st dest
+	bfextu	CMDREG3B(%a6){#6:#3},%d1	|get 3rd dest
+	cmpb	%d0,%d1			|cmp 1st dest with 3rd dest
+	beq	op2_com			|if equal, continue bugfix
+	bfextu	CMDREG2B(%a6){#6:#3},%d1	|get 2nd dest
+	cmpb	%d0,%d1			|cmp 1st dest with 2nd dest
+	bne	fix_done		|if the reg checks fail, exit
+|
+| We have the case in which a conflict exists between the cu src or
+| dest and the dest of the xu.  We must clear the instruction in
+| the cu and restore the state, allowing the instruction in the
+| xu to complete.  Remember, the instruction in the nu
+| was exceptional, and was completed by the appropriate handler.
+| If the result of the xu instruction is not exceptional, we can
+| restore the instruction from the cu to the frame and continue
+| processing the original exception.  If the result is also
+| exceptional, we choose to kill the process.
+|
+|	Items saved from the stack:
+|
+|		$3c stag     - L_SCR1
+|		$40 cmdreg1b - L_SCR2
+|		$44 dtag     - L_SCR3
+|		etemp        - FP_SCR2
+|
+| The cu savepc is set to zero, and the frame is restored to the
+| fpu.
+|
+op2_xu:
+	movel	STAG(%a6),L_SCR1(%a6)
+	movel	CMDREG1B(%a6),L_SCR2(%a6)
+	movel	DTAG(%a6),L_SCR3(%a6)
+	andil	#0xe0000000,L_SCR3(%a6)
+	moveb	#0,CU_SAVEPC(%a6)
+	movel	ETEMP(%a6),FP_SCR2(%a6)
+	movel	ETEMP_HI(%a6),FP_SCR2+4(%a6)
+	movel	ETEMP_LO(%a6),FP_SCR2+8(%a6)
+	movel	(%a7)+,%d1		|save return address from bsr
+	frestore (%a7)+
+	fsave	-(%a7)
+|
+| Check if the instruction which just completed was exceptional.
+|
+	cmpw	#0x4060,(%a7)
+	beq	op2_xb
+|
+| It is necessary to isolate the result of the instruction in the
+| xu if it is to fp0 - fp3 and write that value to the USER_FPn
+| locations on the stack.  The correct destination register is in
+| cmdreg2b.
+|
+	bfextu	CMDREG2B(%a6){#6:#3},%d0	|get dest register no
+	cmpil	#3,%d0
+	bgts	op2_xi
+	beqs	op2_fp3
+	cmpil	#1,%d0
+	blts	op2_fp0
+	beqs	op2_fp1
+op2_fp2:
+	fmovemx %fp2-%fp2,USER_FP2(%a6)
+	bras	op2_xi
+op2_fp1:
+	fmovemx %fp1-%fp1,USER_FP1(%a6)
+	bras	op2_xi
+op2_fp0:
+	fmovemx %fp0-%fp0,USER_FP0(%a6)
+	bras	op2_xi
+op2_fp3:
+	fmovemx %fp3-%fp3,USER_FP3(%a6)
+|
+| The frame returned is idle.  We must build a busy frame to hold
+| the cu state information and fix up etemp.
+|
+op2_xi:
+	movel	#22,%d0		|clear 23 lwords
+	clrl	(%a7)
+op2_loop:
+	clrl	-(%a7)
+	dbf	%d0,op2_loop
+	movel	#0x40600000,-(%a7)
+	movel	L_SCR1(%a6),STAG(%a6)
+	movel	L_SCR2(%a6),CMDREG1B(%a6)
+	movel	L_SCR3(%a6),DTAG(%a6)
+	moveb	#0x6,CU_SAVEPC(%a6)
+	movel	FP_SCR2(%a6),ETEMP(%a6)
+	movel	FP_SCR2+4(%a6),ETEMP_HI(%a6)
+	movel	FP_SCR2+8(%a6),ETEMP_LO(%a6)
+	movel	%d1,-(%a7)
+	bra	op2_com
+
+|
+| We have the opclass 2 single source situation.
+|
+op2_com:
+	moveb	#0x15,%d0
+	bfins	%d0,CMDREG1B(%a6){#0:#6}	|opclass 2, double
+
+	cmpw	#0x407F,ETEMP_EX(%a6)	|single +max
+	bnes	case2
+	movew	#0x43FF,ETEMP_EX(%a6)	|to double +max
+	bra	finish
+case2:
+	cmpw	#0xC07F,ETEMP_EX(%a6)	|single -max
+	bnes	case3
+	movew	#0xC3FF,ETEMP_EX(%a6)	|to double -max
+	bra	finish
+case3:
+	cmpw	#0x3F80,ETEMP_EX(%a6)	|single +min
+	bnes	case4
+	movew	#0x3C00,ETEMP_EX(%a6)	|to double +min
+	bra	finish
+case4:
+	cmpw	#0xBF80,ETEMP_EX(%a6)	|single -min
+	bne	fix_done
+	movew	#0xBC00,ETEMP_EX(%a6)	|to double -min
+	bra	finish
+|
+| The frame returned is busy.  It is not possible to reconstruct
+| the code sequence to allow completion.  fpsp_fmt_error causes
+| an fline illegal instruction to be executed.
+|
+| You should replace the jump to fpsp_fmt_error with a jump
+| to the entry point used to kill a process.
+|
+op2_xb:
+	jmp	fpsp_fmt_error
+
+|
+| Enter here if the case is not of the situations affected by
+| bug #1238, or if the fix is completed, and exit.
+|
+finish:
+fix_done:
+	rts
+
+	|end