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, 677 insertions, 0 deletions

diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h
new file mode 100644
index 000000000..0ccc985b9
--- /dev/null
+++ b/arch/arm/include/asm/tlbflush.h
@@ -0,0 +1,677 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  arch/arm/include/asm/tlbflush.h
+ *
+ *  Copyright (C) 1999-2003 Russell King
+ */
+#ifndef _ASMARM_TLBFLUSH_H
+#define _ASMARM_TLBFLUSH_H
+
+#ifndef __ASSEMBLY__
+# include <linux/mm_types.h>
+#endif
+
+#ifdef CONFIG_MMU
+
+#include <asm/glue.h>
+
+#define TLB_V4_U_PAGE	(1 << 1)
+#define TLB_V4_D_PAGE	(1 << 2)
+#define TLB_V4_I_PAGE	(1 << 3)
+#define TLB_V6_U_PAGE	(1 << 4)
+#define TLB_V6_D_PAGE	(1 << 5)
+#define TLB_V6_I_PAGE	(1 << 6)
+
+#define TLB_V4_U_FULL	(1 << 9)
+#define TLB_V4_D_FULL	(1 << 10)
+#define TLB_V4_I_FULL	(1 << 11)
+#define TLB_V6_U_FULL	(1 << 12)
+#define TLB_V6_D_FULL	(1 << 13)
+#define TLB_V6_I_FULL	(1 << 14)
+
+#define TLB_V6_U_ASID	(1 << 16)
+#define TLB_V6_D_ASID	(1 << 17)
+#define TLB_V6_I_ASID	(1 << 18)
+
+#define TLB_V6_BP	(1 << 19)
+
+/* Unified Inner Shareable TLB operations (ARMv7 MP extensions) */
+#define TLB_V7_UIS_PAGE	(1 << 20)
+#define TLB_V7_UIS_FULL (1 << 21)
+#define TLB_V7_UIS_ASID (1 << 22)
+#define TLB_V7_UIS_BP	(1 << 23)
+
+#define TLB_BARRIER	(1 << 28)
+#define TLB_L2CLEAN_FR	(1 << 29)		/* Feroceon */
+#define TLB_DCLEAN	(1 << 30)
+#define TLB_WB		(1 << 31)
+
+/*
+ *	MMU TLB Model
+ *	=============
+ *
+ *	We have the following to choose from:
+ *	  v4    - ARMv4 without write buffer
+ *	  v4wb  - ARMv4 with write buffer without I TLB flush entry instruction
+ *	  v4wbi - ARMv4 with write buffer with I TLB flush entry instruction
+ *	  fr    - Feroceon (v4wbi with non-outer-cacheable page table walks)
+ *	  fa    - Faraday (v4 with write buffer with UTLB)
+ *	  v6wbi - ARMv6 with write buffer with I TLB flush entry instruction
+ *	  v7wbi - identical to v6wbi
+ */
+#undef _TLB
+#undef MULTI_TLB
+
+#ifdef CONFIG_SMP_ON_UP
+#define MULTI_TLB 1
+#endif
+
+#define v4_tlb_flags	(TLB_V4_U_FULL | TLB_V4_U_PAGE)
+
+#ifdef CONFIG_CPU_TLB_V4WT
+# define v4_possible_flags	v4_tlb_flags
+# define v4_always_flags	v4_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB v4
+# endif
+#else
+# define v4_possible_flags	0
+# define v4_always_flags	(-1UL)
+#endif
+
+#define fa_tlb_flags	(TLB_WB | TLB_DCLEAN | TLB_BARRIER | \
+			 TLB_V4_U_FULL | TLB_V4_U_PAGE)
+
+#ifdef CONFIG_CPU_TLB_FA
+# define fa_possible_flags	fa_tlb_flags
+# define fa_always_flags	fa_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB fa
+# endif
+#else
+# define fa_possible_flags	0
+# define fa_always_flags	(-1UL)
+#endif
+
+#define v4wbi_tlb_flags	(TLB_WB | TLB_DCLEAN | \
+			 TLB_V4_I_FULL | TLB_V4_D_FULL | \
+			 TLB_V4_I_PAGE | TLB_V4_D_PAGE)
+
+#ifdef CONFIG_CPU_TLB_V4WBI
+# define v4wbi_possible_flags	v4wbi_tlb_flags
+# define v4wbi_always_flags	v4wbi_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB v4wbi
+# endif
+#else
+# define v4wbi_possible_flags	0
+# define v4wbi_always_flags	(-1UL)
+#endif
+
+#define fr_tlb_flags	(TLB_WB | TLB_DCLEAN | TLB_L2CLEAN_FR | \
+			 TLB_V4_I_FULL | TLB_V4_D_FULL | \
+			 TLB_V4_I_PAGE | TLB_V4_D_PAGE)
+
+#ifdef CONFIG_CPU_TLB_FEROCEON
+# define fr_possible_flags	fr_tlb_flags
+# define fr_always_flags	fr_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB v4wbi
+# endif
+#else
+# define fr_possible_flags	0
+# define fr_always_flags	(-1UL)
+#endif
+
+#define v4wb_tlb_flags	(TLB_WB | TLB_DCLEAN | \
+			 TLB_V4_I_FULL | TLB_V4_D_FULL | \
+			 TLB_V4_D_PAGE)
+
+#ifdef CONFIG_CPU_TLB_V4WB
+# define v4wb_possible_flags	v4wb_tlb_flags
+# define v4wb_always_flags	v4wb_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB v4wb
+# endif
+#else
+# define v4wb_possible_flags	0
+# define v4wb_always_flags	(-1UL)
+#endif
+
+#define v6wbi_tlb_flags (TLB_WB | TLB_DCLEAN | TLB_BARRIER | \
+			 TLB_V6_I_FULL | TLB_V6_D_FULL | \
+			 TLB_V6_I_PAGE | TLB_V6_D_PAGE | \
+			 TLB_V6_I_ASID | TLB_V6_D_ASID | \
+			 TLB_V6_BP)
+
+#ifdef CONFIG_CPU_TLB_V6
+# define v6wbi_possible_flags	v6wbi_tlb_flags
+# define v6wbi_always_flags	v6wbi_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB v6wbi
+# endif
+#else
+# define v6wbi_possible_flags	0
+# define v6wbi_always_flags	(-1UL)
+#endif
+
+#define v7wbi_tlb_flags_smp	(TLB_WB | TLB_BARRIER | \
+				 TLB_V7_UIS_FULL | TLB_V7_UIS_PAGE | \
+				 TLB_V7_UIS_ASID | TLB_V7_UIS_BP)
+#define v7wbi_tlb_flags_up	(TLB_WB | TLB_DCLEAN | TLB_BARRIER | \
+				 TLB_V6_U_FULL | TLB_V6_U_PAGE | \
+				 TLB_V6_U_ASID | TLB_V6_BP)
+
+#ifdef CONFIG_CPU_TLB_V7
+
+# ifdef CONFIG_SMP_ON_UP
+#  define v7wbi_possible_flags	(v7wbi_tlb_flags_smp | v7wbi_tlb_flags_up)
+#  define v7wbi_always_flags	(v7wbi_tlb_flags_smp & v7wbi_tlb_flags_up)
+# elif defined(CONFIG_SMP)
+#  define v7wbi_possible_flags	v7wbi_tlb_flags_smp
+#  define v7wbi_always_flags	v7wbi_tlb_flags_smp
+# else
+#  define v7wbi_possible_flags	v7wbi_tlb_flags_up
+#  define v7wbi_always_flags	v7wbi_tlb_flags_up
+# endif
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB v7wbi
+# endif
+#else
+# define v7wbi_possible_flags	0
+# define v7wbi_always_flags	(-1UL)
+#endif
+
+#ifndef _TLB
+#error Unknown TLB model
+#endif
+
+#ifndef __ASSEMBLY__
+
+#include <linux/sched.h>
+
+struct cpu_tlb_fns {
+	void (*flush_user_range)(unsigned long, unsigned long, struct vm_area_struct *);
+	void (*flush_kern_range)(unsigned long, unsigned long);
+	unsigned long tlb_flags;
+};
+
+/*
+ * Select the calling method
+ */
+#ifdef MULTI_TLB
+
+#define __cpu_flush_user_tlb_range	cpu_tlb.flush_user_range
+#define __cpu_flush_kern_tlb_range	cpu_tlb.flush_kern_range
+
+#else
+
+#define __cpu_flush_user_tlb_range	__glue(_TLB,_flush_user_tlb_range)
+#define __cpu_flush_kern_tlb_range	__glue(_TLB,_flush_kern_tlb_range)
+
+extern void __cpu_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+extern void __cpu_flush_kern_tlb_range(unsigned long, unsigned long);
+
+#endif
+
+extern struct cpu_tlb_fns cpu_tlb;
+
+#define __cpu_tlb_flags			cpu_tlb.tlb_flags
+
+/*
+ *	TLB Management
+ *	==============
+ *
+ *	The arch/arm/mm/tlb-*.S files implement these methods.
+ *
+ *	The TLB specific code is expected to perform whatever tests it
+ *	needs to determine if it should invalidate the TLB for each
+ *	call.  Start addresses are inclusive and end addresses are
+ *	exclusive; it is safe to round these addresses down.
+ *
+ *	flush_tlb_all()
+ *
+ *		Invalidate the entire TLB.
+ *
+ *	flush_tlb_mm(mm)
+ *
+ *		Invalidate all TLB entries in a particular address
+ *		space.
+ *		- mm	- mm_struct describing address space
+ *
+ *	flush_tlb_range(vma,start,end)
+ *
+ *		Invalidate a range of TLB entries in the specified
+ *		address space.
+ *		- mm	- mm_struct describing address space
+ *		- start - start address (may not be aligned)
+ *		- end	- end address (exclusive, may not be aligned)
+ *
+ *	flush_tlb_page(vma, uaddr)
+ *
+ *		Invalidate the specified page in the specified address range.
+ *		- vma	- vm_area_struct describing address range
+ *		- vaddr - virtual address (may not be aligned)
+ */
+
+/*
+ * We optimise the code below by:
+ *  - building a set of TLB flags that might be set in __cpu_tlb_flags
+ *  - building a set of TLB flags that will always be set in __cpu_tlb_flags
+ *  - if we're going to need __cpu_tlb_flags, access it once and only once
+ *
+ * This allows us to build optimal assembly for the single-CPU type case,
+ * and as close to optimal given the compiler constrants for multi-CPU
+ * case.  We could do better for the multi-CPU case if the compiler
+ * implemented the "%?" method, but this has been discontinued due to too
+ * many people getting it wrong.
+ */
+#define possible_tlb_flags	(v4_possible_flags | \
+				 v4wbi_possible_flags | \
+				 fr_possible_flags | \
+				 v4wb_possible_flags | \
+				 fa_possible_flags | \
+				 v6wbi_possible_flags | \
+				 v7wbi_possible_flags)
+
+#define always_tlb_flags	(v4_always_flags & \
+				 v4wbi_always_flags & \
+				 fr_always_flags & \
+				 v4wb_always_flags & \
+				 fa_always_flags & \
+				 v6wbi_always_flags & \
+				 v7wbi_always_flags)
+
+#define tlb_flag(f)	((always_tlb_flags & (f)) || (__tlb_flag & possible_tlb_flags & (f)))
+
+#define __tlb_op(f, insnarg, arg)					\
+	do {								\
+		if (always_tlb_flags & (f))				\
+			asm("mcr " insnarg				\
+			    : : "r" (arg) : "cc");			\
+		else if (possible_tlb_flags & (f))			\
+			asm("tst %1, %2\n\t"				\
+			    "mcrne " insnarg				\
+			    : : "r" (arg), "r" (__tlb_flag), "Ir" (f)	\
+			    : "cc");					\
+	} while (0)
+
+#define tlb_op(f, regs, arg)	__tlb_op(f, "p15, 0, %0, " regs, arg)
+#define tlb_l2_op(f, regs, arg)	__tlb_op(f, "p15, 1, %0, " regs, arg)
+
+static inline void __local_flush_tlb_all(void)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	tlb_op(TLB_V4_U_FULL | TLB_V6_U_FULL, "c8, c7, 0", zero);
+	tlb_op(TLB_V4_D_FULL | TLB_V6_D_FULL, "c8, c6, 0", zero);
+	tlb_op(TLB_V4_I_FULL | TLB_V6_I_FULL, "c8, c5, 0", zero);
+}
+
+static inline void local_flush_tlb_all(void)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	if (tlb_flag(TLB_WB))
+		dsb(nshst);
+
+	__local_flush_tlb_all();
+	tlb_op(TLB_V7_UIS_FULL, "c8, c7, 0", zero);
+
+	if (tlb_flag(TLB_BARRIER)) {
+		dsb(nsh);
+		isb();
+	}
+}
+
+static inline void __flush_tlb_all(void)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	if (tlb_flag(TLB_WB))
+		dsb(ishst);
+
+	__local_flush_tlb_all();
+	tlb_op(TLB_V7_UIS_FULL, "c8, c3, 0", zero);
+
+	if (tlb_flag(TLB_BARRIER)) {
+		dsb(ish);
+		isb();
+	}
+}
+
+static inline void __local_flush_tlb_mm(struct mm_struct *mm)
+{
+	const int zero = 0;
+	const int asid = ASID(mm);
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	if (possible_tlb_flags & (TLB_V4_U_FULL|TLB_V4_D_FULL|TLB_V4_I_FULL)) {
+		if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm))) {
+			tlb_op(TLB_V4_U_FULL, "c8, c7, 0", zero);
+			tlb_op(TLB_V4_D_FULL, "c8, c6, 0", zero);
+			tlb_op(TLB_V4_I_FULL, "c8, c5, 0", zero);
+		}
+	}
+
+	tlb_op(TLB_V6_U_ASID, "c8, c7, 2", asid);
+	tlb_op(TLB_V6_D_ASID, "c8, c6, 2", asid);
+	tlb_op(TLB_V6_I_ASID, "c8, c5, 2", asid);
+}
+
+static inline void local_flush_tlb_mm(struct mm_struct *mm)
+{
+	const int asid = ASID(mm);
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	if (tlb_flag(TLB_WB))
+		dsb(nshst);
+
+	__local_flush_tlb_mm(mm);
+	tlb_op(TLB_V7_UIS_ASID, "c8, c7, 2", asid);
+
+	if (tlb_flag(TLB_BARRIER))
+		dsb(nsh);
+}
+
+static inline void __flush_tlb_mm(struct mm_struct *mm)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	if (tlb_flag(TLB_WB))
+		dsb(ishst);
+
+	__local_flush_tlb_mm(mm);
+#ifdef CONFIG_ARM_ERRATA_720789
+	tlb_op(TLB_V7_UIS_ASID, "c8, c3, 0", 0);
+#else
+	tlb_op(TLB_V7_UIS_ASID, "c8, c3, 2", ASID(mm));
+#endif
+
+	if (tlb_flag(TLB_BARRIER))
+		dsb(ish);
+}
+
+static inline void
+__local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm);
+
+	if (possible_tlb_flags & (TLB_V4_U_PAGE|TLB_V4_D_PAGE|TLB_V4_I_PAGE|TLB_V4_I_FULL) &&
+	    cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
+		tlb_op(TLB_V4_U_PAGE, "c8, c7, 1", uaddr);
+		tlb_op(TLB_V4_D_PAGE, "c8, c6, 1", uaddr);
+		tlb_op(TLB_V4_I_PAGE, "c8, c5, 1", uaddr);
+		if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL))
+			asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
+	}
+
+	tlb_op(TLB_V6_U_PAGE, "c8, c7, 1", uaddr);
+	tlb_op(TLB_V6_D_PAGE, "c8, c6, 1", uaddr);
+	tlb_op(TLB_V6_I_PAGE, "c8, c5, 1", uaddr);
+}
+
+static inline void
+local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm);
+
+	if (tlb_flag(TLB_WB))
+		dsb(nshst);
+
+	__local_flush_tlb_page(vma, uaddr);
+	tlb_op(TLB_V7_UIS_PAGE, "c8, c7, 1", uaddr);
+
+	if (tlb_flag(TLB_BARRIER))
+		dsb(nsh);
+}
+
+static inline void
+__flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm);
+
+	if (tlb_flag(TLB_WB))
+		dsb(ishst);
+
+	__local_flush_tlb_page(vma, uaddr);
+#ifdef CONFIG_ARM_ERRATA_720789
+	tlb_op(TLB_V7_UIS_PAGE, "c8, c3, 3", uaddr & PAGE_MASK);
+#else
+	tlb_op(TLB_V7_UIS_PAGE, "c8, c3, 1", uaddr);
+#endif
+
+	if (tlb_flag(TLB_BARRIER))
+		dsb(ish);
+}
+
+static inline void __local_flush_tlb_kernel_page(unsigned long kaddr)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	tlb_op(TLB_V4_U_PAGE, "c8, c7, 1", kaddr);
+	tlb_op(TLB_V4_D_PAGE, "c8, c6, 1", kaddr);
+	tlb_op(TLB_V4_I_PAGE, "c8, c5, 1", kaddr);
+	if (!tlb_flag(TLB_V4_I_PAGE) && tlb_flag(TLB_V4_I_FULL))
+		asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
+
+	tlb_op(TLB_V6_U_PAGE, "c8, c7, 1", kaddr);
+	tlb_op(TLB_V6_D_PAGE, "c8, c6, 1", kaddr);
+	tlb_op(TLB_V6_I_PAGE, "c8, c5, 1", kaddr);
+}
+
+static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	kaddr &= PAGE_MASK;
+
+	if (tlb_flag(TLB_WB))
+		dsb(nshst);
+
+	__local_flush_tlb_kernel_page(kaddr);
+	tlb_op(TLB_V7_UIS_PAGE, "c8, c7, 1", kaddr);
+
+	if (tlb_flag(TLB_BARRIER)) {
+		dsb(nsh);
+		isb();
+	}
+}
+
+static inline void __flush_tlb_kernel_page(unsigned long kaddr)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	kaddr &= PAGE_MASK;
+
+	if (tlb_flag(TLB_WB))
+		dsb(ishst);
+
+	__local_flush_tlb_kernel_page(kaddr);
+	tlb_op(TLB_V7_UIS_PAGE, "c8, c3, 1", kaddr);
+
+	if (tlb_flag(TLB_BARRIER)) {
+		dsb(ish);
+		isb();
+	}
+}
+
+/*
+ * Branch predictor maintenance is paired with full TLB invalidation, so
+ * there is no need for any barriers here.
+ */
+static inline void __local_flush_bp_all(void)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	if (tlb_flag(TLB_V6_BP))
+		asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero));
+}
+
+static inline void local_flush_bp_all(void)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	__local_flush_bp_all();
+	if (tlb_flag(TLB_V7_UIS_BP))
+		asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero));
+}
+
+static inline void __flush_bp_all(void)
+{
+	const int zero = 0;
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	__local_flush_bp_all();
+	if (tlb_flag(TLB_V7_UIS_BP))
+		asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero));
+}
+
+/*
+ *	flush_pmd_entry
+ *
+ *	Flush a PMD entry (word aligned, or double-word aligned) to
+ *	RAM if the TLB for the CPU we are running on requires this.
+ *	This is typically used when we are creating PMD entries.
+ *
+ *	clean_pmd_entry
+ *
+ *	Clean (but don't drain the write buffer) if the CPU requires
+ *	these operations.  This is typically used when we are removing
+ *	PMD entries.
+ */
+static inline void flush_pmd_entry(void *pmd)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	tlb_op(TLB_DCLEAN, "c7, c10, 1	@ flush_pmd", pmd);
+	tlb_l2_op(TLB_L2CLEAN_FR, "c15, c9, 1  @ L2 flush_pmd", pmd);
+
+	if (tlb_flag(TLB_WB))
+		dsb(ishst);
+}
+
+static inline void clean_pmd_entry(void *pmd)
+{
+	const unsigned int __tlb_flag = __cpu_tlb_flags;
+
+	tlb_op(TLB_DCLEAN, "c7, c10, 1	@ flush_pmd", pmd);
+	tlb_l2_op(TLB_L2CLEAN_FR, "c15, c9, 1  @ L2 flush_pmd", pmd);
+}
+
+#undef tlb_op
+#undef tlb_flag
+#undef always_tlb_flags
+#undef possible_tlb_flags
+
+/*
+ * Convert calls to our calling convention.
+ */
+#define local_flush_tlb_range(vma,start,end)	__cpu_flush_user_tlb_range(start,end,vma)
+#define local_flush_tlb_kernel_range(s,e)	__cpu_flush_kern_tlb_range(s,e)
+
+#ifndef CONFIG_SMP
+#define flush_tlb_all		local_flush_tlb_all
+#define flush_tlb_mm		local_flush_tlb_mm
+#define flush_tlb_page		local_flush_tlb_page
+#define flush_tlb_kernel_page	local_flush_tlb_kernel_page
+#define flush_tlb_range		local_flush_tlb_range
+#define flush_tlb_kernel_range	local_flush_tlb_kernel_range
+#define flush_bp_all		local_flush_bp_all
+#else
+extern void flush_tlb_all(void);
+extern void flush_tlb_mm(struct mm_struct *mm);
+extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr);
+extern void flush_tlb_kernel_page(unsigned long kaddr);
+extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+extern void flush_bp_all(void);
+#endif
+
+/*
+ * If PG_dcache_clean is not set for the page, we need to ensure that any
+ * cache entries for the kernels virtual memory range are written
+ * back to the page. On ARMv6 and later, the cache coherency is handled via
+ * the set_pte_at() function.
+ */
+#if __LINUX_ARM_ARCH__ < 6
+extern void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
+	pte_t *ptep);
+#else
+static inline void update_mmu_cache(struct vm_area_struct *vma,
+				    unsigned long addr, pte_t *ptep)
+{
+}
+#endif
+
+#define update_mmu_cache_pmd(vma, address, pmd) do { } while (0)
+
+#endif
+
+#elif defined(CONFIG_SMP)	/* !CONFIG_MMU */
+
+#ifndef __ASSEMBLY__
+static inline void local_flush_tlb_all(void)									{ }
+static inline void local_flush_tlb_mm(struct mm_struct *mm)							{ }
+static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)			{ }
+static inline void local_flush_tlb_kernel_page(unsigned long kaddr)						{ }
+static inline void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)	{ }
+static inline void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)				{ }
+static inline void local_flush_bp_all(void)									{ }
+
+extern void flush_tlb_all(void);
+extern void flush_tlb_mm(struct mm_struct *mm);
+extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr);
+extern void flush_tlb_kernel_page(unsigned long kaddr);
+extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+extern void flush_bp_all(void);
+#endif	/* __ASSEMBLY__ */
+
+#endif
+
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_ARM_ERRATA_798181
+extern void erratum_a15_798181_init(void);
+#else
+static inline void erratum_a15_798181_init(void) {}
+#endif
+extern bool (*erratum_a15_798181_handler)(void);
+
+static inline bool erratum_a15_798181(void)
+{
+	if (unlikely(IS_ENABLED(CONFIG_ARM_ERRATA_798181) &&
+		erratum_a15_798181_handler))
+		return erratum_a15_798181_handler();
+	return false;
+}
+#endif
+
+#endif