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, 702 insertions, 0 deletions

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
new file mode 100644
index 000000000..9c687da77
--- /dev/null
+++ b/arch/riscv/Kconfig
@@ -0,0 +1,702 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.rst.
+#
+
+config 64BIT
+	bool
+
+config 32BIT
+	bool
+
+config RISCV
+	def_bool y
+	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
+	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
+	select ARCH_HAS_BINFMT_FLAT
+	select ARCH_HAS_CURRENT_STACK_POINTER
+	select ARCH_HAS_DEBUG_VM_PGTABLE
+	select ARCH_HAS_DEBUG_VIRTUAL if MMU
+	select ARCH_HAS_DEBUG_WX
+	select ARCH_HAS_FORTIFY_SOURCE
+	select ARCH_HAS_GCOV_PROFILE_ALL
+	select ARCH_HAS_GIGANTIC_PAGE
+	select ARCH_HAS_KCOV
+	select ARCH_HAS_MMIOWB
+	select ARCH_HAS_PMEM_API
+	select ARCH_HAS_PTE_SPECIAL
+	select ARCH_HAS_SET_DIRECT_MAP if MMU
+	select ARCH_HAS_SET_MEMORY if MMU
+	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
+	select ARCH_HAS_STRICT_MODULE_RWX if MMU && !XIP_KERNEL
+	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+	select ARCH_HAS_UBSAN_SANITIZE_ALL
+	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
+	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
+	select ARCH_STACKWALK
+	select ARCH_SUPPORTS_ATOMIC_RMW
+	select ARCH_SUPPORTS_DEBUG_PAGEALLOC if MMU
+	select ARCH_SUPPORTS_HUGETLBFS if MMU
+	select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU
+	select ARCH_USE_MEMTEST
+	select ARCH_USE_QUEUED_RWLOCKS
+	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
+	select ARCH_WANT_FRAME_POINTERS
+	select ARCH_WANT_GENERAL_HUGETLB
+	select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
+	select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE
+	select BINFMT_FLAT_NO_DATA_START_OFFSET if !MMU
+	select BUILDTIME_TABLE_SORT if MMU
+	select CLONE_BACKWARDS
+	select CLINT_TIMER if !MMU
+	select COMMON_CLK
+	select CPU_PM if CPU_IDLE
+	select EDAC_SUPPORT
+	select GENERIC_ARCH_TOPOLOGY
+	select GENERIC_ATOMIC64 if !64BIT
+	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
+	select GENERIC_EARLY_IOREMAP
+	select GENERIC_GETTIMEOFDAY if HAVE_GENERIC_VDSO
+	select GENERIC_IDLE_POLL_SETUP
+	select GENERIC_IOREMAP if MMU
+	select GENERIC_IRQ_MULTI_HANDLER
+	select GENERIC_IRQ_SHOW
+	select GENERIC_IRQ_SHOW_LEVEL
+	select GENERIC_LIB_DEVMEM_IS_ALLOWED
+	select GENERIC_PCI_IOMAP
+	select GENERIC_PTDUMP if MMU
+	select GENERIC_SCHED_CLOCK
+	select GENERIC_SMP_IDLE_THREAD
+	select GENERIC_TIME_VSYSCALL if MMU && 64BIT
+	select GENERIC_VDSO_TIME_NS if HAVE_GENERIC_VDSO
+	select HARDIRQS_SW_RESEND
+	select HAVE_ARCH_AUDITSYSCALL
+	select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
+	select HAVE_ARCH_HUGE_VMAP if MMU && 64BIT && !XIP_KERNEL
+	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
+	select HAVE_ARCH_JUMP_LABEL_RELATIVE if !XIP_KERNEL
+	select HAVE_ARCH_KASAN if MMU && 64BIT
+	select HAVE_ARCH_KASAN_VMALLOC if MMU && 64BIT
+	select HAVE_ARCH_KFENCE if MMU && 64BIT
+	select HAVE_ARCH_KGDB if !XIP_KERNEL
+	select HAVE_ARCH_KGDB_QXFER_PKT
+	select HAVE_ARCH_MMAP_RND_BITS if MMU
+	select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
+	select HAVE_ARCH_SECCOMP_FILTER
+	select HAVE_ARCH_TRACEHOOK
+	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT && MMU
+	select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
+	select HAVE_ARCH_THREAD_STRUCT_WHITELIST
+	select HAVE_ARCH_VMAP_STACK if MMU && 64BIT
+	select HAVE_ASM_MODVERSIONS
+	select HAVE_CONTEXT_TRACKING_USER
+	select HAVE_DEBUG_KMEMLEAK
+	select HAVE_DMA_CONTIGUOUS if MMU
+	select HAVE_EBPF_JIT if MMU
+	select HAVE_FUNCTION_ERROR_INJECTION
+	select HAVE_GCC_PLUGINS
+	select HAVE_GENERIC_VDSO if MMU && 64BIT
+	select HAVE_IRQ_TIME_ACCOUNTING
+	select HAVE_KPROBES if !XIP_KERNEL
+	select HAVE_KPROBES_ON_FTRACE if !XIP_KERNEL
+	select HAVE_KRETPROBES if !XIP_KERNEL
+	select HAVE_RETHOOK if !XIP_KERNEL
+	select HAVE_MOVE_PMD
+	select HAVE_MOVE_PUD
+	select HAVE_PCI
+	select HAVE_PERF_EVENTS
+	select HAVE_PERF_REGS
+	select HAVE_PERF_USER_STACK_DUMP
+	select HAVE_POSIX_CPU_TIMERS_TASK_WORK
+	select HAVE_REGS_AND_STACK_ACCESS_API
+	select HAVE_FUNCTION_ARG_ACCESS_API
+	select HAVE_STACKPROTECTOR
+	select HAVE_SYSCALL_TRACEPOINTS
+	select HAVE_RSEQ
+	select IRQ_DOMAIN
+	select IRQ_FORCED_THREADING
+	select MODULES_USE_ELF_RELA if MODULES
+	select MODULE_SECTIONS if MODULES
+	select OF
+	select OF_DMA_DEFAULT_COHERENT
+	select OF_EARLY_FLATTREE
+	select OF_IRQ
+	select PCI_DOMAINS_GENERIC if PCI
+	select PCI_MSI if PCI
+	select RISCV_INTC
+	select RISCV_TIMER if RISCV_SBI
+	select SIFIVE_PLIC
+	select SPARSE_IRQ
+	select SYSCTL_EXCEPTION_TRACE
+	select THREAD_INFO_IN_TASK
+	select TRACE_IRQFLAGS_SUPPORT
+	select UACCESS_MEMCPY if !MMU
+	select ZONE_DMA32 if 64BIT
+	select HAVE_DYNAMIC_FTRACE if !XIP_KERNEL && MMU && $(cc-option,-fpatchable-function-entry=8)
+	select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
+	select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL
+	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_FUNCTION_TRACER if !XIP_KERNEL
+
+config ARCH_MMAP_RND_BITS_MIN
+	default 18 if 64BIT
+	default 8
+
+config ARCH_MMAP_RND_COMPAT_BITS_MIN
+	default 8
+
+# max bits determined by the following formula:
+#  VA_BITS - PAGE_SHIFT - 3
+config ARCH_MMAP_RND_BITS_MAX
+	default 24 if 64BIT # SV39 based
+	default 17
+
+config ARCH_MMAP_RND_COMPAT_BITS_MAX
+	default 17
+
+# set if we run in machine mode, cleared if we run in supervisor mode
+config RISCV_M_MODE
+	bool
+	default !MMU
+
+# set if we are running in S-mode and can use SBI calls
+config RISCV_SBI
+	bool
+	depends on !RISCV_M_MODE
+	default y
+
+config MMU
+	bool "MMU-based Paged Memory Management Support"
+	default y
+	help
+	  Select if you want MMU-based virtualised addressing space
+	  support by paged memory management. If unsure, say 'Y'.
+
+config PAGE_OFFSET
+	hex
+	default 0xC0000000 if 32BIT
+	default 0x80000000 if 64BIT && !MMU
+	default 0xff60000000000000 if 64BIT
+
+config KASAN_SHADOW_OFFSET
+	hex
+	depends on KASAN_GENERIC
+	default 0xdfffffff00000000 if 64BIT
+	default 0xffffffff if 32BIT
+
+config ARCH_FLATMEM_ENABLE
+	def_bool !NUMA
+
+config ARCH_SPARSEMEM_ENABLE
+	def_bool y
+	depends on MMU
+	select SPARSEMEM_STATIC if 32BIT && SPARSEMEM
+	select SPARSEMEM_VMEMMAP_ENABLE if 64BIT
+
+config ARCH_SELECT_MEMORY_MODEL
+	def_bool ARCH_SPARSEMEM_ENABLE
+
+config ARCH_SUPPORTS_UPROBES
+	def_bool y
+
+config STACKTRACE_SUPPORT
+	def_bool y
+
+config GENERIC_BUG
+	def_bool y
+	depends on BUG
+	select GENERIC_BUG_RELATIVE_POINTERS if 64BIT
+
+config GENERIC_BUG_RELATIVE_POINTERS
+	bool
+
+config GENERIC_CALIBRATE_DELAY
+	def_bool y
+
+config GENERIC_CSUM
+	def_bool y
+
+config GENERIC_HWEIGHT
+	def_bool y
+
+config FIX_EARLYCON_MEM
+	def_bool MMU
+
+config PGTABLE_LEVELS
+	int
+	default 5 if 64BIT
+	default 2
+
+config LOCKDEP_SUPPORT
+	def_bool y
+
+config RISCV_DMA_NONCOHERENT
+	bool
+	select ARCH_HAS_DMA_PREP_COHERENT
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+	select ARCH_HAS_SYNC_DMA_FOR_CPU
+	select ARCH_HAS_SETUP_DMA_OPS
+	select DMA_DIRECT_REMAP
+
+config AS_HAS_INSN
+	def_bool $(as-instr,.insn r 51$(comma) 0$(comma) 0$(comma) t0$(comma) t0$(comma) zero)
+
+source "arch/riscv/Kconfig.socs"
+source "arch/riscv/Kconfig.erratas"
+
+menu "Platform type"
+
+config NONPORTABLE
+	bool "Allow configurations that result in non-portable kernels"
+	help
+	  RISC-V kernel binaries are compatible between all known systems
+	  whenever possible, but there are some use cases that can only be
+	  satisfied by configurations that result in kernel binaries that are
+	  not portable between systems.
+
+	  Selecting N does not guarantee kernels will be portable to all known
+	  systems.  Selecting any of the options guarded by NONPORTABLE will
+	  result in kernel binaries that are unlikely to be portable between
+	  systems.
+
+	  If unsure, say N.
+
+choice
+	prompt "Base ISA"
+	default ARCH_RV64I
+	help
+	  This selects the base ISA that this kernel will target and must match
+	  the target platform.
+
+config ARCH_RV32I
+	bool "RV32I"
+	depends on NONPORTABLE
+	select 32BIT
+	select GENERIC_LIB_ASHLDI3
+	select GENERIC_LIB_ASHRDI3
+	select GENERIC_LIB_LSHRDI3
+	select GENERIC_LIB_UCMPDI2
+	select MMU
+
+config ARCH_RV64I
+	bool "RV64I"
+	select 64BIT
+	select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
+	select SWIOTLB if MMU
+
+endchoice
+
+# We must be able to map all physical memory into the kernel, but the compiler
+# is still a bit more efficient when generating code if it's setup in a manner
+# such that it can only map 2GiB of memory.
+choice
+	prompt "Kernel Code Model"
+	default CMODEL_MEDLOW if 32BIT
+	default CMODEL_MEDANY if 64BIT
+
+	config CMODEL_MEDLOW
+		bool "medium low code model"
+	config CMODEL_MEDANY
+		bool "medium any code model"
+endchoice
+
+config MODULE_SECTIONS
+	bool
+	select HAVE_MOD_ARCH_SPECIFIC
+
+config SMP
+	bool "Symmetric Multi-Processing"
+	help
+	  This enables support for systems with more than one CPU.  If
+	  you say N here, the kernel will run on single and
+	  multiprocessor machines, but will use only one CPU of a
+	  multiprocessor machine. If you say Y here, the kernel will run
+	  on many, but not all, single processor machines. On a single
+	  processor machine, the kernel will run faster if you say N
+	  here.
+
+	  If you don't know what to do here, say N.
+
+config NR_CPUS
+	int "Maximum number of CPUs (2-512)"
+	depends on SMP
+	range 2 512 if !RISCV_SBI_V01
+	range 2 32 if RISCV_SBI_V01 && 32BIT
+	range 2 64 if RISCV_SBI_V01 && 64BIT
+	default "32" if 32BIT
+	default "64" if 64BIT
+
+config HOTPLUG_CPU
+	bool "Support for hot-pluggable CPUs"
+	depends on SMP
+	select GENERIC_IRQ_MIGRATION
+	help
+
+	  Say Y here to experiment with turning CPUs off and on.  CPUs
+	  can be controlled through /sys/devices/system/cpu.
+
+	  Say N if you want to disable CPU hotplug.
+
+choice
+	prompt "CPU Tuning"
+	default TUNE_GENERIC
+
+config TUNE_GENERIC
+	bool "generic"
+
+endchoice
+
+# Common NUMA Features
+config NUMA
+	bool "NUMA Memory Allocation and Scheduler Support"
+	depends on SMP && MMU
+	select GENERIC_ARCH_NUMA
+	select OF_NUMA
+	select ARCH_SUPPORTS_NUMA_BALANCING
+	select USE_PERCPU_NUMA_NODE_ID
+	select NEED_PER_CPU_EMBED_FIRST_CHUNK
+	help
+	  Enable NUMA (Non-Uniform Memory Access) support.
+
+	  The kernel will try to allocate memory used by a CPU on the
+	  local memory of the CPU and add some more NUMA awareness to the kernel.
+
+config NODES_SHIFT
+	int "Maximum NUMA Nodes (as a power of 2)"
+	range 1 10
+	default "2"
+	depends on NUMA
+	help
+	  Specify the maximum number of NUMA Nodes available on the target
+	  system.  Increases memory reserved to accommodate various tables.
+
+config RISCV_ALTERNATIVE
+	bool
+	depends on !XIP_KERNEL
+	help
+	  This Kconfig allows the kernel to automatically patch the
+	  errata required by the execution platform at run time. The
+	  code patching is performed once in the boot stages. It means
+	  that the overhead from this mechanism is just taken once.
+
+config RISCV_ALTERNATIVE_EARLY
+	bool
+	depends on RISCV_ALTERNATIVE
+	help
+	  Allows early patching of the kernel for special errata
+
+config RISCV_ISA_C
+	bool "Emit compressed instructions when building Linux"
+	default y
+	help
+	  Adds "C" to the ISA subsets that the toolchain is allowed to emit
+	  when building Linux, which results in compressed instructions in the
+	  Linux binary.
+
+	  If you don't know what to do here, say Y.
+
+config RISCV_ISA_SVPBMT
+	bool "SVPBMT extension support"
+	depends on 64BIT && MMU
+	depends on !XIP_KERNEL
+	select RISCV_ALTERNATIVE
+	default y
+	help
+	   Adds support to dynamically detect the presence of the SVPBMT
+	   ISA-extension (Supervisor-mode: page-based memory types) and
+	   enable its usage.
+
+	   The memory type for a page contains a combination of attributes
+	   that indicate the cacheability, idempotency, and ordering
+	   properties for access to that page.
+
+	   The SVPBMT extension is only available on 64Bit cpus.
+
+	   If you don't know what to do here, say Y.
+
+config TOOLCHAIN_HAS_ZICBOM
+	bool
+	default y
+	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zicbom)
+	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zicbom)
+	depends on LLD_VERSION >= 150000 || LD_VERSION >= 23800
+
+config RISCV_ISA_ZICBOM
+	bool "Zicbom extension support for non-coherent DMA operation"
+	depends on TOOLCHAIN_HAS_ZICBOM
+	depends on !XIP_KERNEL && MMU
+	select RISCV_DMA_NONCOHERENT
+	select RISCV_ALTERNATIVE
+	default y
+	help
+	   Adds support to dynamically detect the presence of the ZICBOM
+	   extension (Cache Block Management Operations) and enable its
+	   usage.
+
+	   The Zicbom extension can be used to handle for example
+	   non-coherent DMA support on devices that need it.
+
+	   If you don't know what to do here, say Y.
+
+config TOOLCHAIN_HAS_ZIHINTPAUSE
+	bool
+	default y
+	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zihintpause)
+	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zihintpause)
+	depends on LLD_VERSION >= 150000 || LD_VERSION >= 23600
+
+config FPU
+	bool "FPU support"
+	default y
+	help
+	  Say N here if you want to disable all floating-point related procedure
+	  in the kernel.
+
+	  If you don't know what to do here, say Y.
+
+endmenu # "Platform type"
+
+menu "Kernel features"
+
+source "kernel/Kconfig.hz"
+
+config RISCV_SBI_V01
+	bool "SBI v0.1 support"
+	depends on RISCV_SBI
+	help
+	  This config allows kernel to use SBI v0.1 APIs. This will be
+	  deprecated in future once legacy M-mode software are no longer in use.
+
+config RISCV_BOOT_SPINWAIT
+	bool "Spinwait booting method"
+	depends on SMP
+	default y if RISCV_SBI_V01 || RISCV_M_MODE
+	help
+	  This enables support for booting Linux via spinwait method. In the
+	  spinwait method, all cores randomly jump to Linux. One of the cores
+	  gets chosen via lottery and all other keep spinning on a percpu
+	  variable. This method cannot support CPU hotplug and sparse hartid
+	  scheme. It should be only enabled for M-mode Linux or platforms relying
+	  on older firmware without SBI HSM extension. All other platforms should
+	  rely on ordered booting via SBI HSM extension which gets chosen
+	  dynamically at runtime if the firmware supports it.
+
+	  Since spinwait is incompatible with sparse hart IDs, it requires
+	  NR_CPUS be large enough to contain the physical hart ID of the first
+	  hart to enter Linux.
+
+	  If unsure what to do here, say N.
+
+config KEXEC
+	bool "Kexec system call"
+	select KEXEC_CORE
+	select HOTPLUG_CPU if SMP
+	depends on MMU
+	help
+	  kexec is a system call that implements the ability to shutdown your
+	  current kernel, and to start another kernel. It is like a reboot
+	  but it is independent of the system firmware. And like a reboot
+	  you can start any kernel with it, not just Linux.
+
+	  The name comes from the similarity to the exec system call.
+
+config KEXEC_FILE
+	bool "kexec file based systmem call"
+	select KEXEC_CORE
+	select KEXEC_ELF
+	select HAVE_IMA_KEXEC if IMA
+	depends on 64BIT && MMU
+	help
+	  This is new version of kexec system call. This system call is
+	  file based and takes file descriptors as system call argument
+	  for kernel and initramfs as opposed to list of segments as
+	  accepted by previous system call.
+
+	  If you don't know what to do here, say Y.
+
+config ARCH_HAS_KEXEC_PURGATORY
+	def_bool KEXEC_FILE
+	depends on CRYPTO=y
+	depends on CRYPTO_SHA256=y
+
+config CRASH_DUMP
+	bool "Build kdump crash kernel"
+	help
+	  Generate crash dump after being started by kexec. This should
+	  be normally only set in special crash dump kernels which are
+	  loaded in the main kernel with kexec-tools into a specially
+	  reserved region and then later executed after a crash by
+	  kdump/kexec.
+
+	  For more details see Documentation/admin-guide/kdump/kdump.rst
+
+config COMPAT
+	bool "Kernel support for 32-bit U-mode"
+	default 64BIT
+	depends on 64BIT && MMU
+	help
+	  This option enables support for a 32-bit U-mode running under a 64-bit
+	  kernel at S-mode. riscv32-specific components such as system calls,
+	  the user helper functions (vdso), signal rt_frame functions and the
+	  ptrace interface are handled appropriately by the kernel.
+
+	  If you want to execute 32-bit userspace applications, say Y.
+
+endmenu # "Kernel features"
+
+menu "Boot options"
+
+config CMDLINE
+	string "Built-in kernel command line"
+	help
+	  For most platforms, the arguments for the kernel's command line
+	  are provided at run-time, during boot. However, there are cases
+	  where either no arguments are being provided or the provided
+	  arguments are insufficient or even invalid.
+
+	  When that occurs, it is possible to define a built-in command
+	  line here and choose how the kernel should use it later on.
+
+choice
+	prompt "Built-in command line usage" if CMDLINE != ""
+	default CMDLINE_FALLBACK
+	help
+	  Choose how the kernel will handle the provided built-in command
+	  line.
+
+config CMDLINE_FALLBACK
+	bool "Use bootloader kernel arguments if available"
+	help
+	  Use the built-in command line as fallback in case we get nothing
+	  during boot. This is the default behaviour.
+
+config CMDLINE_EXTEND
+	bool "Extend bootloader kernel arguments"
+	help
+	  The command-line arguments provided during boot will be
+	  appended to the built-in command line. This is useful in
+	  cases where the provided arguments are insufficient and
+	  you don't want to or cannot modify them.
+
+config CMDLINE_FORCE
+	bool "Always use the default kernel command string"
+	help
+	  Always use the built-in command line, even if we get one during
+	  boot. This is useful in case you need to override the provided
+	  command line on systems where you don't have or want control
+	  over it.
+
+endchoice
+
+config EFI_STUB
+	bool
+
+config EFI
+	bool "UEFI runtime support"
+	depends on OF && !XIP_KERNEL
+	select LIBFDT
+	select UCS2_STRING
+	select EFI_PARAMS_FROM_FDT
+	select EFI_STUB
+	select EFI_GENERIC_STUB
+	select EFI_RUNTIME_WRAPPERS
+	select RISCV_ISA_C
+	depends on MMU
+	default y
+	help
+	  This option provides support for runtime services provided
+	  by UEFI firmware (such as non-volatile variables, realtime
+	  clock, and platform reset). A UEFI stub is also provided to
+	  allow the kernel to be booted as an EFI application. This
+	  is only useful on systems that have UEFI firmware.
+
+config CC_HAVE_STACKPROTECTOR_TLS
+	def_bool $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-guard-offset=0)
+
+config STACKPROTECTOR_PER_TASK
+	def_bool y
+	depends on !RANDSTRUCT
+	depends on STACKPROTECTOR && CC_HAVE_STACKPROTECTOR_TLS
+
+config PHYS_RAM_BASE_FIXED
+	bool "Explicitly specified physical RAM address"
+	depends on NONPORTABLE
+	default n
+
+config PHYS_RAM_BASE
+	hex "Platform Physical RAM address"
+	depends on PHYS_RAM_BASE_FIXED
+	default "0x80000000"
+	help
+	  This is the physical address of RAM in the system. It has to be
+	  explicitly specified to run early relocations of read-write data
+	  from flash to RAM.
+
+config XIP_KERNEL
+	bool "Kernel Execute-In-Place from ROM"
+	depends on MMU && SPARSEMEM && NONPORTABLE
+	# This prevents XIP from being enabled by all{yes,mod}config, which
+	# fail to build since XIP doesn't support large kernels.
+	depends on !COMPILE_TEST
+	select PHYS_RAM_BASE_FIXED
+	help
+	  Execute-In-Place allows the kernel to run from non-volatile storage
+	  directly addressable by the CPU, such as NOR flash. This saves RAM
+	  space since the text section of the kernel is not loaded from flash
+	  to RAM.  Read-write sections, such as the data section and stack,
+	  are still copied to RAM.  The XIP kernel is not compressed since
+	  it has to run directly from flash, so it will take more space to
+	  store it.  The flash address used to link the kernel object files,
+	  and for storing it, is configuration dependent. Therefore, if you
+	  say Y here, you must know the proper physical address where to
+	  store the kernel image depending on your own flash memory usage.
+
+	  Also note that the make target becomes "make xipImage" rather than
+	  "make zImage" or "make Image".  The final kernel binary to put in
+	  ROM memory will be arch/riscv/boot/xipImage.
+
+	  SPARSEMEM is required because the kernel text and rodata that are
+	  flash resident are not backed by memmap, then any attempt to get
+	  a struct page on those regions will trigger a fault.
+
+	  If unsure, say N.
+
+config XIP_PHYS_ADDR
+	hex "XIP Kernel Physical Location"
+	depends on XIP_KERNEL
+	default "0x21000000"
+	help
+	  This is the physical address in your flash memory the kernel will
+	  be linked for and stored to.  This address is dependent on your
+	  own flash usage.
+
+endmenu # "Boot options"
+
+config BUILTIN_DTB
+	bool
+	depends on OF && NONPORTABLE
+	default y if XIP_KERNEL
+
+config PORTABLE
+	bool
+	default !NONPORTABLE
+	select EFI
+	select OF
+	select MMU
+
+menu "Power management options"
+
+source "kernel/power/Kconfig"
+
+endmenu # "Power management options"
+
+menu "CPU Power Management"
+
+source "drivers/cpuidle/Kconfig"
+
+source "drivers/cpufreq/Kconfig"
+
+endmenu # "CPU Power Management"
+
+source "arch/riscv/kvm/Kconfig"