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, 459 insertions, 0 deletions

diff --git a/arch/mips/include/asm/mips-cm.h b/arch/mips/include/asm/mips-cm.h
new file mode 100644
index 000000000..23c67c087
--- /dev/null
+++ b/arch/mips/include/asm/mips-cm.h
@@ -0,0 +1,459 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2013 Imagination Technologies
+ * Author: Paul Burton <paul.burton@mips.com>
+ */
+
+#ifndef __MIPS_ASM_MIPS_CPS_H__
+# error Please include asm/mips-cps.h rather than asm/mips-cm.h
+#endif
+
+#ifndef __MIPS_ASM_MIPS_CM_H__
+#define __MIPS_ASM_MIPS_CM_H__
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/errno.h>
+
+/* The base address of the CM GCR block */
+extern void __iomem *mips_gcr_base;
+
+/* The base address of the CM L2-only sync region */
+extern void __iomem *mips_cm_l2sync_base;
+
+/**
+ * __mips_cm_phys_base - retrieve the physical base address of the CM
+ *
+ * This function returns the physical base address of the Coherence Manager
+ * global control block, or 0 if no Coherence Manager is present. It provides
+ * a default implementation which reads the CMGCRBase register where available,
+ * and may be overridden by platforms which determine this address in a
+ * different way by defining a function with the same prototype except for the
+ * name mips_cm_phys_base (without underscores).
+ */
+extern phys_addr_t __mips_cm_phys_base(void);
+
+/*
+ * mips_cm_is64 - determine CM register width
+ *
+ * The CM register width is determined by the version of the CM, with CM3
+ * introducing 64 bit GCRs and all prior CM versions having 32 bit GCRs.
+ * However we may run a kernel built for MIPS32 on a system with 64 bit GCRs,
+ * or vice-versa. This variable indicates the width of the memory accesses
+ * that the kernel will perform to GCRs, which may differ from the actual
+ * width of the GCRs.
+ *
+ * It's set to 0 for 32-bit accesses and 1 for 64-bit accesses.
+ */
+extern int mips_cm_is64;
+
+/**
+ * mips_cm_error_report - Report CM cache errors
+ */
+#ifdef CONFIG_MIPS_CM
+extern void mips_cm_error_report(void);
+#else
+static inline void mips_cm_error_report(void) {}
+#endif
+
+/**
+ * mips_cm_probe - probe for a Coherence Manager
+ *
+ * Attempt to detect the presence of a Coherence Manager. Returns 0 if a CM
+ * is successfully detected, else -errno.
+ */
+#ifdef CONFIG_MIPS_CM
+extern int mips_cm_probe(void);
+#else
+static inline int mips_cm_probe(void)
+{
+	return -ENODEV;
+}
+#endif
+
+/**
+ * mips_cm_present - determine whether a Coherence Manager is present
+ *
+ * Returns true if a CM is present in the system, else false.
+ */
+static inline bool mips_cm_present(void)
+{
+#ifdef CONFIG_MIPS_CM
+	return mips_gcr_base != NULL;
+#else
+	return false;
+#endif
+}
+
+/**
+ * mips_cm_has_l2sync - determine whether an L2-only sync region is present
+ *
+ * Returns true if the system implements an L2-only sync region, else false.
+ */
+static inline bool mips_cm_has_l2sync(void)
+{
+#ifdef CONFIG_MIPS_CM
+	return mips_cm_l2sync_base != NULL;
+#else
+	return false;
+#endif
+}
+
+/* Offsets to register blocks from the CM base address */
+#define MIPS_CM_GCB_OFS		0x0000 /* Global Control Block */
+#define MIPS_CM_CLCB_OFS	0x2000 /* Core Local Control Block */
+#define MIPS_CM_COCB_OFS	0x4000 /* Core Other Control Block */
+#define MIPS_CM_GDB_OFS		0x6000 /* Global Debug Block */
+
+/* Total size of the CM memory mapped registers */
+#define MIPS_CM_GCR_SIZE	0x8000
+
+/* Size of the L2-only sync region */
+#define MIPS_CM_L2SYNC_SIZE	0x1000
+
+#define GCR_ACCESSOR_RO(sz, off, name)					\
+	CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_GCB_OFS + off, name)		\
+	CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_COCB_OFS + off, redir_##name)
+
+#define GCR_ACCESSOR_RW(sz, off, name)					\
+	CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_GCB_OFS + off, name)		\
+	CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_COCB_OFS + off, redir_##name)
+
+#define GCR_CX_ACCESSOR_RO(sz, off, name)				\
+	CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_CLCB_OFS + off, cl_##name)	\
+	CPS_ACCESSOR_RO(gcr, sz, MIPS_CM_COCB_OFS + off, co_##name)
+
+#define GCR_CX_ACCESSOR_RW(sz, off, name)				\
+	CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_CLCB_OFS + off, cl_##name)	\
+	CPS_ACCESSOR_RW(gcr, sz, MIPS_CM_COCB_OFS + off, co_##name)
+
+/* GCR_CONFIG - Information about the system */
+GCR_ACCESSOR_RO(64, 0x000, config)
+#define CM_GCR_CONFIG_CLUSTER_COH_CAPABLE	BIT_ULL(43)
+#define CM_GCR_CONFIG_CLUSTER_ID		GENMASK_ULL(39, 32)
+#define CM_GCR_CONFIG_NUM_CLUSTERS		GENMASK(29, 23)
+#define CM_GCR_CONFIG_NUMIOCU			GENMASK(15, 8)
+#define CM_GCR_CONFIG_PCORES			GENMASK(7, 0)
+
+/* GCR_BASE - Base address of the Global Configuration Registers (GCRs) */
+GCR_ACCESSOR_RW(64, 0x008, base)
+#define CM_GCR_BASE_GCRBASE			GENMASK_ULL(47, 15)
+#define CM_GCR_BASE_CMDEFTGT			GENMASK(1, 0)
+#define  CM_GCR_BASE_CMDEFTGT_MEM		0
+#define  CM_GCR_BASE_CMDEFTGT_RESERVED		1
+#define  CM_GCR_BASE_CMDEFTGT_IOCU0		2
+#define  CM_GCR_BASE_CMDEFTGT_IOCU1		3
+
+/* GCR_ACCESS - Controls core/IOCU access to GCRs */
+GCR_ACCESSOR_RW(32, 0x020, access)
+#define CM_GCR_ACCESS_ACCESSEN			GENMASK(7, 0)
+
+/* GCR_REV - Indicates the Coherence Manager revision */
+GCR_ACCESSOR_RO(32, 0x030, rev)
+#define CM_GCR_REV_MAJOR			GENMASK(15, 8)
+#define CM_GCR_REV_MINOR			GENMASK(7, 0)
+
+#define CM_ENCODE_REV(major, minor) \
+		(FIELD_PREP(CM_GCR_REV_MAJOR, major) | \
+		 FIELD_PREP(CM_GCR_REV_MINOR, minor))
+
+#define CM_REV_CM2				CM_ENCODE_REV(6, 0)
+#define CM_REV_CM2_5				CM_ENCODE_REV(7, 0)
+#define CM_REV_CM3				CM_ENCODE_REV(8, 0)
+#define CM_REV_CM3_5				CM_ENCODE_REV(9, 0)
+
+/* GCR_ERR_CONTROL - Control error checking logic */
+GCR_ACCESSOR_RW(32, 0x038, err_control)
+#define CM_GCR_ERR_CONTROL_L2_ECC_EN		BIT(1)
+#define CM_GCR_ERR_CONTROL_L2_ECC_SUPPORT	BIT(0)
+
+/* GCR_ERR_MASK - Control which errors are reported as interrupts */
+GCR_ACCESSOR_RW(64, 0x040, error_mask)
+
+/* GCR_ERR_CAUSE - Indicates the type of error that occurred */
+GCR_ACCESSOR_RW(64, 0x048, error_cause)
+#define CM_GCR_ERROR_CAUSE_ERRTYPE		GENMASK(31, 27)
+#define CM3_GCR_ERROR_CAUSE_ERRTYPE		GENMASK_ULL(63, 58)
+#define CM_GCR_ERROR_CAUSE_ERRINFO		GENMASK(26, 0)
+
+/* GCR_ERR_ADDR - Indicates the address associated with an error */
+GCR_ACCESSOR_RW(64, 0x050, error_addr)
+
+/* GCR_ERR_MULT - Indicates when multiple errors have occurred */
+GCR_ACCESSOR_RW(64, 0x058, error_mult)
+#define CM_GCR_ERROR_MULT_ERR2ND		GENMASK(4, 0)
+
+/* GCR_L2_ONLY_SYNC_BASE - Base address of the L2 cache-only sync region */
+GCR_ACCESSOR_RW(64, 0x070, l2_only_sync_base)
+#define CM_GCR_L2_ONLY_SYNC_BASE_SYNCBASE	GENMASK(31, 12)
+#define CM_GCR_L2_ONLY_SYNC_BASE_SYNCEN		BIT(0)
+
+/* GCR_GIC_BASE - Base address of the Global Interrupt Controller (GIC) */
+GCR_ACCESSOR_RW(64, 0x080, gic_base)
+#define CM_GCR_GIC_BASE_GICBASE			GENMASK(31, 17)
+#define CM_GCR_GIC_BASE_GICEN			BIT(0)
+
+/* GCR_CPC_BASE - Base address of the Cluster Power Controller (CPC) */
+GCR_ACCESSOR_RW(64, 0x088, cpc_base)
+#define CM_GCR_CPC_BASE_CPCBASE			GENMASK(31, 15)
+#define CM_GCR_CPC_BASE_CPCEN			BIT(0)
+
+/* GCR_REGn_BASE - Base addresses of CM address regions */
+GCR_ACCESSOR_RW(64, 0x090, reg0_base)
+GCR_ACCESSOR_RW(64, 0x0a0, reg1_base)
+GCR_ACCESSOR_RW(64, 0x0b0, reg2_base)
+GCR_ACCESSOR_RW(64, 0x0c0, reg3_base)
+#define CM_GCR_REGn_BASE_BASEADDR		GENMASK(31, 16)
+
+/* GCR_REGn_MASK - Size & destination of CM address regions */
+GCR_ACCESSOR_RW(64, 0x098, reg0_mask)
+GCR_ACCESSOR_RW(64, 0x0a8, reg1_mask)
+GCR_ACCESSOR_RW(64, 0x0b8, reg2_mask)
+GCR_ACCESSOR_RW(64, 0x0c8, reg3_mask)
+#define CM_GCR_REGn_MASK_ADDRMASK		GENMASK(31, 16)
+#define CM_GCR_REGn_MASK_CCAOVR			GENMASK(7, 5)
+#define CM_GCR_REGn_MASK_CCAOVREN		BIT(4)
+#define CM_GCR_REGn_MASK_DROPL2			BIT(2)
+#define CM_GCR_REGn_MASK_CMTGT			GENMASK(1, 0)
+#define  CM_GCR_REGn_MASK_CMTGT_DISABLED	0x0
+#define  CM_GCR_REGn_MASK_CMTGT_MEM		0x1
+#define  CM_GCR_REGn_MASK_CMTGT_IOCU0		0x2
+#define  CM_GCR_REGn_MASK_CMTGT_IOCU1		0x3
+
+/* GCR_GIC_STATUS - Indicates presence of a Global Interrupt Controller (GIC) */
+GCR_ACCESSOR_RO(32, 0x0d0, gic_status)
+#define CM_GCR_GIC_STATUS_EX			BIT(0)
+
+/* GCR_CPC_STATUS - Indicates presence of a Cluster Power Controller (CPC) */
+GCR_ACCESSOR_RO(32, 0x0f0, cpc_status)
+#define CM_GCR_CPC_STATUS_EX			BIT(0)
+
+/* GCR_L2_CONFIG - Indicates L2 cache configuration when Config5.L2C=1 */
+GCR_ACCESSOR_RW(32, 0x130, l2_config)
+#define CM_GCR_L2_CONFIG_BYPASS			BIT(20)
+#define CM_GCR_L2_CONFIG_SET_SIZE		GENMASK(15, 12)
+#define CM_GCR_L2_CONFIG_LINE_SIZE		GENMASK(11, 8)
+#define CM_GCR_L2_CONFIG_ASSOC			GENMASK(7, 0)
+
+/* GCR_SYS_CONFIG2 - Further information about the system */
+GCR_ACCESSOR_RO(32, 0x150, sys_config2)
+#define CM_GCR_SYS_CONFIG2_MAXVPW		GENMASK(3, 0)
+
+/* GCR_L2_PFT_CONTROL - Controls hardware L2 prefetching */
+GCR_ACCESSOR_RW(32, 0x300, l2_pft_control)
+#define CM_GCR_L2_PFT_CONTROL_PAGEMASK		GENMASK(31, 12)
+#define CM_GCR_L2_PFT_CONTROL_PFTEN		BIT(8)
+#define CM_GCR_L2_PFT_CONTROL_NPFT		GENMASK(7, 0)
+
+/* GCR_L2_PFT_CONTROL_B - Controls hardware L2 prefetching */
+GCR_ACCESSOR_RW(32, 0x308, l2_pft_control_b)
+#define CM_GCR_L2_PFT_CONTROL_B_CEN		BIT(8)
+#define CM_GCR_L2_PFT_CONTROL_B_PORTID		GENMASK(7, 0)
+
+/* GCR_L2SM_COP - L2 cache op state machine control */
+GCR_ACCESSOR_RW(32, 0x620, l2sm_cop)
+#define CM_GCR_L2SM_COP_PRESENT			BIT(31)
+#define CM_GCR_L2SM_COP_RESULT			GENMASK(8, 6)
+#define  CM_GCR_L2SM_COP_RESULT_DONTCARE	0
+#define  CM_GCR_L2SM_COP_RESULT_DONE_OK		1
+#define  CM_GCR_L2SM_COP_RESULT_DONE_ERROR	2
+#define  CM_GCR_L2SM_COP_RESULT_ABORT_OK	3
+#define  CM_GCR_L2SM_COP_RESULT_ABORT_ERROR	4
+#define CM_GCR_L2SM_COP_RUNNING			BIT(5)
+#define CM_GCR_L2SM_COP_TYPE			GENMASK(4, 2)
+#define  CM_GCR_L2SM_COP_TYPE_IDX_WBINV		0
+#define  CM_GCR_L2SM_COP_TYPE_IDX_STORETAG	1
+#define  CM_GCR_L2SM_COP_TYPE_IDX_STORETAGDATA	2
+#define  CM_GCR_L2SM_COP_TYPE_HIT_INV		4
+#define  CM_GCR_L2SM_COP_TYPE_HIT_WBINV		5
+#define  CM_GCR_L2SM_COP_TYPE_HIT_WB		6
+#define  CM_GCR_L2SM_COP_TYPE_FETCHLOCK		7
+#define CM_GCR_L2SM_COP_CMD			GENMASK(1, 0)
+#define  CM_GCR_L2SM_COP_CMD_START		1	/* only when idle */
+#define  CM_GCR_L2SM_COP_CMD_ABORT		3	/* only when running */
+
+/* GCR_L2SM_TAG_ADDR_COP - L2 cache op state machine address control */
+GCR_ACCESSOR_RW(64, 0x628, l2sm_tag_addr_cop)
+#define CM_GCR_L2SM_TAG_ADDR_COP_NUM_LINES	GENMASK_ULL(63, 48)
+#define CM_GCR_L2SM_TAG_ADDR_COP_START_TAG	GENMASK_ULL(47, 6)
+
+/* GCR_BEV_BASE - Controls the location of the BEV for powered up cores */
+GCR_ACCESSOR_RW(64, 0x680, bev_base)
+
+/* GCR_Cx_RESET_RELEASE - Controls core reset for CM 1.x */
+GCR_CX_ACCESSOR_RW(32, 0x000, reset_release)
+
+/* GCR_Cx_COHERENCE - Controls core coherence */
+GCR_CX_ACCESSOR_RW(32, 0x008, coherence)
+#define CM_GCR_Cx_COHERENCE_COHDOMAINEN		GENMASK(7, 0)
+#define CM3_GCR_Cx_COHERENCE_COHEN		BIT(0)
+
+/* GCR_Cx_CONFIG - Information about a core's configuration */
+GCR_CX_ACCESSOR_RO(32, 0x010, config)
+#define CM_GCR_Cx_CONFIG_IOCUTYPE		GENMASK(11, 10)
+#define CM_GCR_Cx_CONFIG_PVPE			GENMASK(9, 0)
+
+/* GCR_Cx_OTHER - Configure the core-other/redirect GCR block */
+GCR_CX_ACCESSOR_RW(32, 0x018, other)
+#define CM_GCR_Cx_OTHER_CORENUM			GENMASK(31, 16)	/* CM < 3 */
+#define CM_GCR_Cx_OTHER_CLUSTER_EN		BIT(31)		/* CM >= 3.5 */
+#define CM_GCR_Cx_OTHER_GIC_EN			BIT(30)		/* CM >= 3.5 */
+#define CM_GCR_Cx_OTHER_BLOCK			GENMASK(25, 24)	/* CM >= 3.5 */
+#define  CM_GCR_Cx_OTHER_BLOCK_LOCAL		0
+#define  CM_GCR_Cx_OTHER_BLOCK_GLOBAL		1
+#define  CM_GCR_Cx_OTHER_BLOCK_USER		2
+#define  CM_GCR_Cx_OTHER_BLOCK_GLOBAL_HIGH	3
+#define CM_GCR_Cx_OTHER_CLUSTER			GENMASK(21, 16)	/* CM >= 3.5 */
+#define CM3_GCR_Cx_OTHER_CORE			GENMASK(13, 8)	/* CM >= 3 */
+#define  CM_GCR_Cx_OTHER_CORE_CM		32
+#define CM3_GCR_Cx_OTHER_VP			GENMASK(2, 0)	/* CM >= 3 */
+
+/* GCR_Cx_RESET_BASE - Configure where powered up cores will fetch from */
+GCR_CX_ACCESSOR_RW(32, 0x020, reset_base)
+#define CM_GCR_Cx_RESET_BASE_BEVEXCBASE		GENMASK(31, 12)
+
+/* GCR_Cx_ID - Identify the current core */
+GCR_CX_ACCESSOR_RO(32, 0x028, id)
+#define CM_GCR_Cx_ID_CLUSTER			GENMASK(15, 8)
+#define CM_GCR_Cx_ID_CORE			GENMASK(7, 0)
+
+/* GCR_Cx_RESET_EXT_BASE - Configure behaviour when cores reset or power up */
+GCR_CX_ACCESSOR_RW(32, 0x030, reset_ext_base)
+#define CM_GCR_Cx_RESET_EXT_BASE_EVARESET	BIT(31)
+#define CM_GCR_Cx_RESET_EXT_BASE_UEB		BIT(30)
+#define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCMASK	GENMASK(27, 20)
+#define CM_GCR_Cx_RESET_EXT_BASE_BEVEXCPA	GENMASK(7, 1)
+#define CM_GCR_Cx_RESET_EXT_BASE_PRESENT	BIT(0)
+
+/**
+ * mips_cm_l2sync - perform an L2-only sync operation
+ *
+ * If an L2-only sync region is present in the system then this function
+ * performs and L2-only sync and returns zero. Otherwise it returns -ENODEV.
+ */
+static inline int mips_cm_l2sync(void)
+{
+	if (!mips_cm_has_l2sync())
+		return -ENODEV;
+
+	writel(0, mips_cm_l2sync_base);
+	return 0;
+}
+
+/**
+ * mips_cm_revision() - return CM revision
+ *
+ * Return: The revision of the CM, from GCR_REV, or 0 if no CM is present. The
+ * return value should be checked against the CM_REV_* macros.
+ */
+static inline int mips_cm_revision(void)
+{
+	if (!mips_cm_present())
+		return 0;
+
+	return read_gcr_rev();
+}
+
+/**
+ * mips_cm_max_vp_width() - return the width in bits of VP indices
+ *
+ * Return: the width, in bits, of VP indices in fields that combine core & VP
+ * indices.
+ */
+static inline unsigned int mips_cm_max_vp_width(void)
+{
+	extern int smp_num_siblings;
+
+	if (mips_cm_revision() >= CM_REV_CM3)
+		return FIELD_GET(CM_GCR_SYS_CONFIG2_MAXVPW,
+				 read_gcr_sys_config2());
+
+	if (mips_cm_present()) {
+		/*
+		 * We presume that all cores in the system will have the same
+		 * number of VP(E)s, and if that ever changes then this will
+		 * need revisiting.
+		 */
+		return FIELD_GET(CM_GCR_Cx_CONFIG_PVPE, read_gcr_cl_config()) + 1;
+	}
+
+	if (IS_ENABLED(CONFIG_SMP))
+		return smp_num_siblings;
+
+	return 1;
+}
+
+/**
+ * mips_cm_vp_id() - calculate the hardware VP ID for a CPU
+ * @cpu: the CPU whose VP ID to calculate
+ *
+ * Hardware such as the GIC uses identifiers for VPs which may not match the
+ * CPU numbers used by Linux. This function calculates the hardware VP
+ * identifier corresponding to a given CPU.
+ *
+ * Return: the VP ID for the CPU.
+ */
+static inline unsigned int mips_cm_vp_id(unsigned int cpu)
+{
+	unsigned int core = cpu_core(&cpu_data[cpu]);
+	unsigned int vp = cpu_vpe_id(&cpu_data[cpu]);
+
+	return (core * mips_cm_max_vp_width()) + vp;
+}
+
+#ifdef CONFIG_MIPS_CM
+
+/**
+ * mips_cm_lock_other - lock access to redirect/other region
+ * @cluster: the other cluster to be accessed
+ * @core: the other core to be accessed
+ * @vp: the VP within the other core to be accessed
+ * @block: the register block to be accessed
+ *
+ * Configure the redirect/other region for the local core/VP (depending upon
+ * the CM revision) to target the specified @cluster, @core, @vp & register
+ * @block. Must be called before using the redirect/other region, and followed
+ * by a call to mips_cm_unlock_other() when access to the redirect/other region
+ * is complete.
+ *
+ * This function acquires a spinlock such that code between it &
+ * mips_cm_unlock_other() calls cannot be pre-empted by anything which may
+ * reconfigure the redirect/other region, and cannot be interfered with by
+ * another VP in the core. As such calls to this function should not be nested.
+ */
+extern void mips_cm_lock_other(unsigned int cluster, unsigned int core,
+			       unsigned int vp, unsigned int block);
+
+/**
+ * mips_cm_unlock_other - unlock access to redirect/other region
+ *
+ * Must be called after mips_cm_lock_other() once all required access to the
+ * redirect/other region has been completed.
+ */
+extern void mips_cm_unlock_other(void);
+
+#else /* !CONFIG_MIPS_CM */
+
+static inline void mips_cm_lock_other(unsigned int cluster, unsigned int core,
+				      unsigned int vp, unsigned int block) { }
+static inline void mips_cm_unlock_other(void) { }
+
+#endif /* !CONFIG_MIPS_CM */
+
+/**
+ * mips_cm_lock_other_cpu - lock access to redirect/other region
+ * @cpu: the other CPU whose register we want to access
+ *
+ * Configure the redirect/other region for the local core/VP (depending upon
+ * the CM revision) to target the specified @cpu & register @block. This is
+ * equivalent to calling mips_cm_lock_other() but accepts a Linux CPU number
+ * for convenience.
+ */
+static inline void mips_cm_lock_other_cpu(unsigned int cpu, unsigned int block)
+{
+	struct cpuinfo_mips *d = &cpu_data[cpu];
+
+	mips_cm_lock_other(cpu_cluster(d), cpu_core(d), cpu_vpe_id(d), block);
+}
+
+#endif /* __MIPS_ASM_MIPS_CM_H__ */