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, 368 insertions, 0 deletions

diff --git a/arch/riscv/kernel/traps_misaligned.c b/arch/riscv/kernel/traps_misaligned.c
new file mode 100644
index 000000000..378f5b151
--- /dev/null
+++ b/arch/riscv/kernel/traps_misaligned.c
@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Western Digital Corporation or its affiliates.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/stringify.h>
+
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/csr.h>
+
+#define INSN_MATCH_LB			0x3
+#define INSN_MASK_LB			0x707f
+#define INSN_MATCH_LH			0x1003
+#define INSN_MASK_LH			0x707f
+#define INSN_MATCH_LW			0x2003
+#define INSN_MASK_LW			0x707f
+#define INSN_MATCH_LD			0x3003
+#define INSN_MASK_LD			0x707f
+#define INSN_MATCH_LBU			0x4003
+#define INSN_MASK_LBU			0x707f
+#define INSN_MATCH_LHU			0x5003
+#define INSN_MASK_LHU			0x707f
+#define INSN_MATCH_LWU			0x6003
+#define INSN_MASK_LWU			0x707f
+#define INSN_MATCH_SB			0x23
+#define INSN_MASK_SB			0x707f
+#define INSN_MATCH_SH			0x1023
+#define INSN_MASK_SH			0x707f
+#define INSN_MATCH_SW			0x2023
+#define INSN_MASK_SW			0x707f
+#define INSN_MATCH_SD			0x3023
+#define INSN_MASK_SD			0x707f
+
+#define INSN_MATCH_FLW			0x2007
+#define INSN_MASK_FLW			0x707f
+#define INSN_MATCH_FLD			0x3007
+#define INSN_MASK_FLD			0x707f
+#define INSN_MATCH_FLQ			0x4007
+#define INSN_MASK_FLQ			0x707f
+#define INSN_MATCH_FSW			0x2027
+#define INSN_MASK_FSW			0x707f
+#define INSN_MATCH_FSD			0x3027
+#define INSN_MASK_FSD			0x707f
+#define INSN_MATCH_FSQ			0x4027
+#define INSN_MASK_FSQ			0x707f
+
+#define INSN_MATCH_C_LD			0x6000
+#define INSN_MASK_C_LD			0xe003
+#define INSN_MATCH_C_SD			0xe000
+#define INSN_MASK_C_SD			0xe003
+#define INSN_MATCH_C_LW			0x4000
+#define INSN_MASK_C_LW			0xe003
+#define INSN_MATCH_C_SW			0xc000
+#define INSN_MASK_C_SW			0xe003
+#define INSN_MATCH_C_LDSP		0x6002
+#define INSN_MASK_C_LDSP		0xe003
+#define INSN_MATCH_C_SDSP		0xe002
+#define INSN_MASK_C_SDSP		0xe003
+#define INSN_MATCH_C_LWSP		0x4002
+#define INSN_MASK_C_LWSP		0xe003
+#define INSN_MATCH_C_SWSP		0xc002
+#define INSN_MASK_C_SWSP		0xe003
+
+#define INSN_MATCH_C_FLD		0x2000
+#define INSN_MASK_C_FLD			0xe003
+#define INSN_MATCH_C_FLW		0x6000
+#define INSN_MASK_C_FLW			0xe003
+#define INSN_MATCH_C_FSD		0xa000
+#define INSN_MASK_C_FSD			0xe003
+#define INSN_MATCH_C_FSW		0xe000
+#define INSN_MASK_C_FSW			0xe003
+#define INSN_MATCH_C_FLDSP		0x2002
+#define INSN_MASK_C_FLDSP		0xe003
+#define INSN_MATCH_C_FSDSP		0xa002
+#define INSN_MASK_C_FSDSP		0xe003
+#define INSN_MATCH_C_FLWSP		0x6002
+#define INSN_MASK_C_FLWSP		0xe003
+#define INSN_MATCH_C_FSWSP		0xe002
+#define INSN_MASK_C_FSWSP		0xe003
+
+#define INSN_LEN(insn)			((((insn) & 0x3) < 0x3) ? 2 : 4)
+
+#if defined(CONFIG_64BIT)
+#define LOG_REGBYTES			3
+#define XLEN				64
+#else
+#define LOG_REGBYTES			2
+#define XLEN				32
+#endif
+#define REGBYTES			(1 << LOG_REGBYTES)
+#define XLEN_MINUS_16			((XLEN) - 16)
+
+#define SH_RD				7
+#define SH_RS1				15
+#define SH_RS2				20
+#define SH_RS2C				2
+
+#define RV_X(x, s, n)			(((x) >> (s)) & ((1 << (n)) - 1))
+#define RVC_LW_IMM(x)			((RV_X(x, 6, 1) << 2) | \
+					 (RV_X(x, 10, 3) << 3) | \
+					 (RV_X(x, 5, 1) << 6))
+#define RVC_LD_IMM(x)			((RV_X(x, 10, 3) << 3) | \
+					 (RV_X(x, 5, 2) << 6))
+#define RVC_LWSP_IMM(x)			((RV_X(x, 4, 3) << 2) | \
+					 (RV_X(x, 12, 1) << 5) | \
+					 (RV_X(x, 2, 2) << 6))
+#define RVC_LDSP_IMM(x)			((RV_X(x, 5, 2) << 3) | \
+					 (RV_X(x, 12, 1) << 5) | \
+					 (RV_X(x, 2, 3) << 6))
+#define RVC_SWSP_IMM(x)			((RV_X(x, 9, 4) << 2) | \
+					 (RV_X(x, 7, 2) << 6))
+#define RVC_SDSP_IMM(x)			((RV_X(x, 10, 3) << 3) | \
+					 (RV_X(x, 7, 3) << 6))
+#define RVC_RS1S(insn)			(8 + RV_X(insn, SH_RD, 3))
+#define RVC_RS2S(insn)			(8 + RV_X(insn, SH_RS2C, 3))
+#define RVC_RS2(insn)			RV_X(insn, SH_RS2C, 5)
+
+#define SHIFT_RIGHT(x, y)		\
+	((y) < 0 ? ((x) << -(y)) : ((x) >> (y)))
+
+#define REG_MASK			\
+	((1 << (5 + LOG_REGBYTES)) - (1 << LOG_REGBYTES))
+
+#define REG_OFFSET(insn, pos)		\
+	(SHIFT_RIGHT((insn), (pos) - LOG_REGBYTES) & REG_MASK)
+
+#define REG_PTR(insn, pos, regs)	\
+	(ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
+
+#define GET_RM(insn)			(((insn) >> 12) & 7)
+
+#define GET_RS1(insn, regs)		(*REG_PTR(insn, SH_RS1, regs))
+#define GET_RS2(insn, regs)		(*REG_PTR(insn, SH_RS2, regs))
+#define GET_RS1S(insn, regs)		(*REG_PTR(RVC_RS1S(insn), 0, regs))
+#define GET_RS2S(insn, regs)		(*REG_PTR(RVC_RS2S(insn), 0, regs))
+#define GET_RS2C(insn, regs)		(*REG_PTR(insn, SH_RS2C, regs))
+#define GET_SP(regs)			(*REG_PTR(2, 0, regs))
+#define SET_RD(insn, regs, val)		(*REG_PTR(insn, SH_RD, regs) = (val))
+#define IMM_I(insn)			((s32)(insn) >> 20)
+#define IMM_S(insn)			(((s32)(insn) >> 25 << 5) | \
+					 (s32)(((insn) >> 7) & 0x1f))
+#define MASK_FUNCT3			0x7000
+
+#define GET_PRECISION(insn) (((insn) >> 25) & 3)
+#define GET_RM(insn) (((insn) >> 12) & 7)
+#define PRECISION_S 0
+#define PRECISION_D 1
+
+#define DECLARE_UNPRIVILEGED_LOAD_FUNCTION(type, insn)			\
+static inline type load_##type(const type *addr)			\
+{									\
+	type val;							\
+	asm (#insn " %0, %1"						\
+	: "=&r" (val) : "m" (*addr));					\
+	return val;							\
+}
+
+#define DECLARE_UNPRIVILEGED_STORE_FUNCTION(type, insn)			\
+static inline void store_##type(type *addr, type val)			\
+{									\
+	asm volatile (#insn " %0, %1\n"					\
+	: : "r" (val), "m" (*addr));					\
+}
+
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u8, lbu)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u16, lhu)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s8, lb)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s16, lh)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(s32, lw)
+DECLARE_UNPRIVILEGED_STORE_FUNCTION(u8, sb)
+DECLARE_UNPRIVILEGED_STORE_FUNCTION(u16, sh)
+DECLARE_UNPRIVILEGED_STORE_FUNCTION(u32, sw)
+#if defined(CONFIG_64BIT)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u32, lwu)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u64, ld)
+DECLARE_UNPRIVILEGED_STORE_FUNCTION(u64, sd)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(ulong, ld)
+#else
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(u32, lw)
+DECLARE_UNPRIVILEGED_LOAD_FUNCTION(ulong, lw)
+
+static inline u64 load_u64(const u64 *addr)
+{
+	return load_u32((u32 *)addr)
+		+ ((u64)load_u32((u32 *)addr + 1) << 32);
+}
+
+static inline void store_u64(u64 *addr, u64 val)
+{
+	store_u32((u32 *)addr, val);
+	store_u32((u32 *)addr + 1, val >> 32);
+}
+#endif
+
+static inline ulong get_insn(ulong mepc)
+{
+	register ulong __mepc asm ("a2") = mepc;
+	ulong val, rvc_mask = 3, tmp;
+
+	asm ("and %[tmp], %[addr], 2\n"
+		"bnez %[tmp], 1f\n"
+#if defined(CONFIG_64BIT)
+		__stringify(LWU) " %[insn], (%[addr])\n"
+#else
+		__stringify(LW) " %[insn], (%[addr])\n"
+#endif
+		"and %[tmp], %[insn], %[rvc_mask]\n"
+		"beq %[tmp], %[rvc_mask], 2f\n"
+		"sll %[insn], %[insn], %[xlen_minus_16]\n"
+		"srl %[insn], %[insn], %[xlen_minus_16]\n"
+		"j 2f\n"
+		"1:\n"
+		"lhu %[insn], (%[addr])\n"
+		"and %[tmp], %[insn], %[rvc_mask]\n"
+		"bne %[tmp], %[rvc_mask], 2f\n"
+		"lhu %[tmp], 2(%[addr])\n"
+		"sll %[tmp], %[tmp], 16\n"
+		"add %[insn], %[insn], %[tmp]\n"
+		"2:"
+	: [insn] "=&r" (val), [tmp] "=&r" (tmp)
+	: [addr] "r" (__mepc), [rvc_mask] "r" (rvc_mask),
+	  [xlen_minus_16] "i" (XLEN_MINUS_16));
+
+	return val;
+}
+
+union reg_data {
+	u8 data_bytes[8];
+	ulong data_ulong;
+	u64 data_u64;
+};
+
+int handle_misaligned_load(struct pt_regs *regs)
+{
+	union reg_data val;
+	unsigned long epc = regs->epc;
+	unsigned long insn = get_insn(epc);
+	unsigned long addr = csr_read(mtval);
+	int i, fp = 0, shift = 0, len = 0;
+
+	regs->epc = 0;
+
+	if ((insn & INSN_MASK_LW) == INSN_MATCH_LW) {
+		len = 4;
+		shift = 8 * (sizeof(unsigned long) - len);
+#if defined(CONFIG_64BIT)
+	} else if ((insn & INSN_MASK_LD) == INSN_MATCH_LD) {
+		len = 8;
+		shift = 8 * (sizeof(unsigned long) - len);
+	} else if ((insn & INSN_MASK_LWU) == INSN_MATCH_LWU) {
+		len = 4;
+#endif
+	} else if ((insn & INSN_MASK_FLD) == INSN_MATCH_FLD) {
+		fp = 1;
+		len = 8;
+	} else if ((insn & INSN_MASK_FLW) == INSN_MATCH_FLW) {
+		fp = 1;
+		len = 4;
+	} else if ((insn & INSN_MASK_LH) == INSN_MATCH_LH) {
+		len = 2;
+		shift = 8 * (sizeof(unsigned long) - len);
+	} else if ((insn & INSN_MASK_LHU) == INSN_MATCH_LHU) {
+		len = 2;
+#if defined(CONFIG_64BIT)
+	} else if ((insn & INSN_MASK_C_LD) == INSN_MATCH_C_LD) {
+		len = 8;
+		shift = 8 * (sizeof(unsigned long) - len);
+		insn = RVC_RS2S(insn) << SH_RD;
+	} else if ((insn & INSN_MASK_C_LDSP) == INSN_MATCH_C_LDSP &&
+		   ((insn >> SH_RD) & 0x1f)) {
+		len = 8;
+		shift = 8 * (sizeof(unsigned long) - len);
+#endif
+	} else if ((insn & INSN_MASK_C_LW) == INSN_MATCH_C_LW) {
+		len = 4;
+		shift = 8 * (sizeof(unsigned long) - len);
+		insn = RVC_RS2S(insn) << SH_RD;
+	} else if ((insn & INSN_MASK_C_LWSP) == INSN_MATCH_C_LWSP &&
+		   ((insn >> SH_RD) & 0x1f)) {
+		len = 4;
+		shift = 8 * (sizeof(unsigned long) - len);
+	} else if ((insn & INSN_MASK_C_FLD) == INSN_MATCH_C_FLD) {
+		fp = 1;
+		len = 8;
+		insn = RVC_RS2S(insn) << SH_RD;
+	} else if ((insn & INSN_MASK_C_FLDSP) == INSN_MATCH_C_FLDSP) {
+		fp = 1;
+		len = 8;
+#if defined(CONFIG_32BIT)
+	} else if ((insn & INSN_MASK_C_FLW) == INSN_MATCH_C_FLW) {
+		fp = 1;
+		len = 4;
+		insn = RVC_RS2S(insn) << SH_RD;
+	} else if ((insn & INSN_MASK_C_FLWSP) == INSN_MATCH_C_FLWSP) {
+		fp = 1;
+		len = 4;
+#endif
+	} else {
+		regs->epc = epc;
+		return -1;
+	}
+
+	val.data_u64 = 0;
+	for (i = 0; i < len; i++)
+		val.data_bytes[i] = load_u8((void *)(addr + i));
+
+	if (fp)
+		return -1;
+	SET_RD(insn, regs, val.data_ulong << shift >> shift);
+
+	regs->epc = epc + INSN_LEN(insn);
+
+	return 0;
+}
+
+int handle_misaligned_store(struct pt_regs *regs)
+{
+	union reg_data val;
+	unsigned long epc = regs->epc;
+	unsigned long insn = get_insn(epc);
+	unsigned long addr = csr_read(mtval);
+	int i, len = 0;
+
+	regs->epc = 0;
+
+	val.data_ulong = GET_RS2(insn, regs);
+
+	if ((insn & INSN_MASK_SW) == INSN_MATCH_SW) {
+		len = 4;
+#if defined(CONFIG_64BIT)
+	} else if ((insn & INSN_MASK_SD) == INSN_MATCH_SD) {
+		len = 8;
+#endif
+	} else if ((insn & INSN_MASK_SH) == INSN_MATCH_SH) {
+		len = 2;
+#if defined(CONFIG_64BIT)
+	} else if ((insn & INSN_MASK_C_SD) == INSN_MATCH_C_SD) {
+		len = 8;
+		val.data_ulong = GET_RS2S(insn, regs);
+	} else if ((insn & INSN_MASK_C_SDSP) == INSN_MATCH_C_SDSP &&
+		   ((insn >> SH_RD) & 0x1f)) {
+		len = 8;
+		val.data_ulong = GET_RS2C(insn, regs);
+#endif
+	} else if ((insn & INSN_MASK_C_SW) == INSN_MATCH_C_SW) {
+		len = 4;
+		val.data_ulong = GET_RS2S(insn, regs);
+	} else if ((insn & INSN_MASK_C_SWSP) == INSN_MATCH_C_SWSP &&
+		   ((insn >> SH_RD) & 0x1f)) {
+		len = 4;
+		val.data_ulong = GET_RS2C(insn, regs);
+	} else {
+		regs->epc = epc;
+		return -1;
+	}
+
+	for (i = 0; i < len; i++)
+		store_u8((void *)(addr + i), val.data_bytes[i]);
+
+	regs->epc = epc + INSN_LEN(insn);
+
+	return 0;
+}