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, 403 insertions, 0 deletions

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
new file mode 100644
index 000000000..1d2aa448d
--- /dev/null
+++ b/arch/s390/kernel/traps.c
@@ -0,0 +1,403 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  S390 version
+ *    Copyright IBM Corp. 1999, 2000
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ *               Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
+ *
+ *  Derived from "arch/i386/kernel/traps.c"
+ *    Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+/*
+ * 'Traps.c' handles hardware traps and faults after we have saved some
+ * state in 'asm.s'.
+ */
+#include "asm/irqflags.h"
+#include "asm/ptrace.h"
+#include <linux/kprobes.h>
+#include <linux/kdebug.h>
+#include <linux/randomize_kstack.h>
+#include <linux/extable.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/sched/debug.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/cpu.h>
+#include <linux/entry-common.h>
+#include <asm/asm-extable.h>
+#include <asm/fpu/api.h>
+#include <asm/vtime.h>
+#include "entry.h"
+
+static inline void __user *get_trap_ip(struct pt_regs *regs)
+{
+	unsigned long address;
+
+	if (regs->int_code & 0x200)
+		address = current->thread.trap_tdb.data[3];
+	else
+		address = regs->psw.addr;
+	return (void __user *) (address - (regs->int_code >> 16));
+}
+
+int is_valid_bugaddr(unsigned long addr)
+{
+	return 1;
+}
+
+void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
+{
+	if (user_mode(regs)) {
+		force_sig_fault(si_signo, si_code, get_trap_ip(regs));
+		report_user_fault(regs, si_signo, 0);
+        } else {
+		if (!fixup_exception(regs))
+			die(regs, str);
+        }
+}
+
+static void do_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
+{
+	if (notify_die(DIE_TRAP, str, regs, 0,
+		       regs->int_code, si_signo) == NOTIFY_STOP)
+		return;
+	do_report_trap(regs, si_signo, si_code, str);
+}
+NOKPROBE_SYMBOL(do_trap);
+
+void do_per_trap(struct pt_regs *regs)
+{
+	if (notify_die(DIE_SSTEP, "sstep", regs, 0, 0, SIGTRAP) == NOTIFY_STOP)
+		return;
+	if (!current->ptrace)
+		return;
+	force_sig_fault(SIGTRAP, TRAP_HWBKPT,
+		(void __force __user *) current->thread.per_event.address);
+}
+NOKPROBE_SYMBOL(do_per_trap);
+
+static void default_trap_handler(struct pt_regs *regs)
+{
+	if (user_mode(regs)) {
+		report_user_fault(regs, SIGSEGV, 0);
+		force_exit_sig(SIGSEGV);
+	} else
+		die(regs, "Unknown program exception");
+}
+
+#define DO_ERROR_INFO(name, signr, sicode, str) \
+static void name(struct pt_regs *regs)		\
+{						\
+	do_trap(regs, signr, sicode, str);	\
+}
+
+DO_ERROR_INFO(addressing_exception, SIGILL, ILL_ILLADR,
+	      "addressing exception")
+DO_ERROR_INFO(execute_exception, SIGILL, ILL_ILLOPN,
+	      "execute exception")
+DO_ERROR_INFO(divide_exception, SIGFPE, FPE_INTDIV,
+	      "fixpoint divide exception")
+DO_ERROR_INFO(overflow_exception, SIGFPE, FPE_INTOVF,
+	      "fixpoint overflow exception")
+DO_ERROR_INFO(hfp_overflow_exception, SIGFPE, FPE_FLTOVF,
+	      "HFP overflow exception")
+DO_ERROR_INFO(hfp_underflow_exception, SIGFPE, FPE_FLTUND,
+	      "HFP underflow exception")
+DO_ERROR_INFO(hfp_significance_exception, SIGFPE, FPE_FLTRES,
+	      "HFP significance exception")
+DO_ERROR_INFO(hfp_divide_exception, SIGFPE, FPE_FLTDIV,
+	      "HFP divide exception")
+DO_ERROR_INFO(hfp_sqrt_exception, SIGFPE, FPE_FLTINV,
+	      "HFP square root exception")
+DO_ERROR_INFO(operand_exception, SIGILL, ILL_ILLOPN,
+	      "operand exception")
+DO_ERROR_INFO(privileged_op, SIGILL, ILL_PRVOPC,
+	      "privileged operation")
+DO_ERROR_INFO(special_op_exception, SIGILL, ILL_ILLOPN,
+	      "special operation exception")
+DO_ERROR_INFO(transaction_exception, SIGILL, ILL_ILLOPN,
+	      "transaction constraint exception")
+
+static inline void do_fp_trap(struct pt_regs *regs, __u32 fpc)
+{
+	int si_code = 0;
+	/* FPC[2] is Data Exception Code */
+	if ((fpc & 0x00000300) == 0) {
+		/* bits 6 and 7 of DXC are 0 iff IEEE exception */
+		if (fpc & 0x8000) /* invalid fp operation */
+			si_code = FPE_FLTINV;
+		else if (fpc & 0x4000) /* div by 0 */
+			si_code = FPE_FLTDIV;
+		else if (fpc & 0x2000) /* overflow */
+			si_code = FPE_FLTOVF;
+		else if (fpc & 0x1000) /* underflow */
+			si_code = FPE_FLTUND;
+		else if (fpc & 0x0800) /* inexact */
+			si_code = FPE_FLTRES;
+	}
+	do_trap(regs, SIGFPE, si_code, "floating point exception");
+}
+
+static void translation_specification_exception(struct pt_regs *regs)
+{
+	/* May never happen. */
+	panic("Translation-Specification Exception");
+}
+
+static void illegal_op(struct pt_regs *regs)
+{
+        __u8 opcode[6];
+	__u16 __user *location;
+	int is_uprobe_insn = 0;
+	int signal = 0;
+
+	location = get_trap_ip(regs);
+
+	if (user_mode(regs)) {
+		if (get_user(*((__u16 *) opcode), (__u16 __user *) location))
+			return;
+		if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
+			if (current->ptrace)
+				force_sig_fault(SIGTRAP, TRAP_BRKPT, location);
+			else
+				signal = SIGILL;
+#ifdef CONFIG_UPROBES
+		} else if (*((__u16 *) opcode) == UPROBE_SWBP_INSN) {
+			is_uprobe_insn = 1;
+#endif
+		} else
+			signal = SIGILL;
+	}
+	/*
+	 * We got either an illegal op in kernel mode, or user space trapped
+	 * on a uprobes illegal instruction. See if kprobes or uprobes picks
+	 * it up. If not, SIGILL.
+	 */
+	if (is_uprobe_insn || !user_mode(regs)) {
+		if (notify_die(DIE_BPT, "bpt", regs, 0,
+			       3, SIGTRAP) != NOTIFY_STOP)
+			signal = SIGILL;
+	}
+	if (signal)
+		do_trap(regs, signal, ILL_ILLOPC, "illegal operation");
+}
+NOKPROBE_SYMBOL(illegal_op);
+
+DO_ERROR_INFO(specification_exception, SIGILL, ILL_ILLOPN,
+	      "specification exception");
+
+static void vector_exception(struct pt_regs *regs)
+{
+	int si_code, vic;
+
+	if (!MACHINE_HAS_VX) {
+		do_trap(regs, SIGILL, ILL_ILLOPN, "illegal operation");
+		return;
+	}
+
+	/* get vector interrupt code from fpc */
+	save_fpu_regs();
+	vic = (current->thread.fpu.fpc & 0xf00) >> 8;
+	switch (vic) {
+	case 1: /* invalid vector operation */
+		si_code = FPE_FLTINV;
+		break;
+	case 2: /* division by zero */
+		si_code = FPE_FLTDIV;
+		break;
+	case 3: /* overflow */
+		si_code = FPE_FLTOVF;
+		break;
+	case 4: /* underflow */
+		si_code = FPE_FLTUND;
+		break;
+	case 5:	/* inexact */
+		si_code = FPE_FLTRES;
+		break;
+	default: /* unknown cause */
+		si_code = 0;
+	}
+	do_trap(regs, SIGFPE, si_code, "vector exception");
+}
+
+static void data_exception(struct pt_regs *regs)
+{
+	save_fpu_regs();
+	if (current->thread.fpu.fpc & FPC_DXC_MASK)
+		do_fp_trap(regs, current->thread.fpu.fpc);
+	else
+		do_trap(regs, SIGILL, ILL_ILLOPN, "data exception");
+}
+
+static void space_switch_exception(struct pt_regs *regs)
+{
+	/* Set user psw back to home space mode. */
+	if (user_mode(regs))
+		regs->psw.mask |= PSW_ASC_HOME;
+	/* Send SIGILL. */
+	do_trap(regs, SIGILL, ILL_PRVOPC, "space switch event");
+}
+
+static void monitor_event_exception(struct pt_regs *regs)
+{
+	if (user_mode(regs))
+		return;
+
+	switch (report_bug(regs->psw.addr - (regs->int_code >> 16), regs)) {
+	case BUG_TRAP_TYPE_NONE:
+		fixup_exception(regs);
+		break;
+	case BUG_TRAP_TYPE_WARN:
+		break;
+	case BUG_TRAP_TYPE_BUG:
+		die(regs, "monitor event");
+		break;
+	}
+}
+
+void kernel_stack_overflow(struct pt_regs *regs)
+{
+	bust_spinlocks(1);
+	printk("Kernel stack overflow.\n");
+	show_regs(regs);
+	bust_spinlocks(0);
+	panic("Corrupt kernel stack, can't continue.");
+}
+NOKPROBE_SYMBOL(kernel_stack_overflow);
+
+static void __init test_monitor_call(void)
+{
+	int val = 1;
+
+	if (!IS_ENABLED(CONFIG_BUG))
+		return;
+	asm volatile(
+		"	mc	0,0\n"
+		"0:	xgr	%0,%0\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "+d" (val));
+	if (!val)
+		panic("Monitor call doesn't work!\n");
+}
+
+void __init trap_init(void)
+{
+	local_mcck_enable();
+	test_monitor_call();
+}
+
+static void (*pgm_check_table[128])(struct pt_regs *regs);
+
+void noinstr __do_pgm_check(struct pt_regs *regs)
+{
+	unsigned int trapnr;
+	irqentry_state_t state;
+
+	regs->int_code = S390_lowcore.pgm_int_code;
+	regs->int_parm_long = S390_lowcore.trans_exc_code;
+
+	state = irqentry_enter(regs);
+
+	if (user_mode(regs)) {
+		update_timer_sys();
+		if (!static_branch_likely(&cpu_has_bear)) {
+			if (regs->last_break < 4096)
+				regs->last_break = 1;
+		}
+		current->thread.last_break = regs->last_break;
+	}
+
+	if (S390_lowcore.pgm_code & 0x0200) {
+		/* transaction abort */
+		current->thread.trap_tdb = S390_lowcore.pgm_tdb;
+	}
+
+	if (S390_lowcore.pgm_code & PGM_INT_CODE_PER) {
+		if (user_mode(regs)) {
+			struct per_event *ev = &current->thread.per_event;
+
+			set_thread_flag(TIF_PER_TRAP);
+			ev->address = S390_lowcore.per_address;
+			ev->cause = S390_lowcore.per_code_combined;
+			ev->paid = S390_lowcore.per_access_id;
+		} else {
+			/* PER event in kernel is kprobes */
+			__arch_local_irq_ssm(regs->psw.mask & ~PSW_MASK_PER);
+			do_per_trap(regs);
+			goto out;
+		}
+	}
+
+	if (!irqs_disabled_flags(regs->psw.mask))
+		trace_hardirqs_on();
+	__arch_local_irq_ssm(regs->psw.mask & ~PSW_MASK_PER);
+
+	trapnr = regs->int_code & PGM_INT_CODE_MASK;
+	if (trapnr)
+		pgm_check_table[trapnr](regs);
+out:
+	local_irq_disable();
+	irqentry_exit(regs, state);
+}
+
+/*
+ * The program check table contains exactly 128 (0x00-0x7f) entries. Each
+ * line defines the function to be called corresponding to the program check
+ * interruption code.
+ */
+static void (*pgm_check_table[128])(struct pt_regs *regs) = {
+	[0x00]		= default_trap_handler,
+	[0x01]		= illegal_op,
+	[0x02]		= privileged_op,
+	[0x03]		= execute_exception,
+	[0x04]		= do_protection_exception,
+	[0x05]		= addressing_exception,
+	[0x06]		= specification_exception,
+	[0x07]		= data_exception,
+	[0x08]		= overflow_exception,
+	[0x09]		= divide_exception,
+	[0x0a]		= overflow_exception,
+	[0x0b]		= divide_exception,
+	[0x0c]		= hfp_overflow_exception,
+	[0x0d]		= hfp_underflow_exception,
+	[0x0e]		= hfp_significance_exception,
+	[0x0f]		= hfp_divide_exception,
+	[0x10]		= do_dat_exception,
+	[0x11]		= do_dat_exception,
+	[0x12]		= translation_specification_exception,
+	[0x13]		= special_op_exception,
+	[0x14]		= default_trap_handler,
+	[0x15]		= operand_exception,
+	[0x16]		= default_trap_handler,
+	[0x17]		= default_trap_handler,
+	[0x18]		= transaction_exception,
+	[0x19]		= default_trap_handler,
+	[0x1a]		= default_trap_handler,
+	[0x1b]		= vector_exception,
+	[0x1c]		= space_switch_exception,
+	[0x1d]		= hfp_sqrt_exception,
+	[0x1e ... 0x37] = default_trap_handler,
+	[0x38]		= do_dat_exception,
+	[0x39]		= do_dat_exception,
+	[0x3a]		= do_dat_exception,
+	[0x3b]		= do_dat_exception,
+	[0x3c]		= default_trap_handler,
+	[0x3d]		= do_secure_storage_access,
+	[0x3e]		= do_non_secure_storage_access,
+	[0x3f]		= do_secure_storage_violation,
+	[0x40]		= monitor_event_exception,
+	[0x41 ... 0x7f] = default_trap_handler,
+};
+
+#define COND_TRAP(x) asm(			\
+	".weak " __stringify(x) "\n\t"		\
+	".set  " __stringify(x) ","		\
+	__stringify(default_trap_handler))
+
+COND_TRAP(do_secure_storage_access);
+COND_TRAP(do_non_secure_storage_access);
+COND_TRAP(do_secure_storage_violation);