Merge tag 'riscv-for-linus-6.6-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

			memory region [offset, offset + size] for that kernel

			image. If '@offset' is omitted, then a suitable offset

			is selected automatically.

			[KNL, X86-64, ARM64] Select a region under 4G first, and

			[KNL, X86-64, ARM64, RISCV] Select a region under 4G first, and

			fall back to reserve region above 4G when '@offset'

			hasn't been specified.

			See Documentation/admin-guide/kdump/kdump.rst for further details.

			Documentation/admin-guide/kdump/kdump.rst for an example.

	crashkernel=size[KMG],high

			[KNL, X86-64, ARM64] range could be above 4G. Allow kernel

			to allocate physical memory region from top, so could

			be above 4G if system have more than 4G ram installed.

			Otherwise memory region will be allocated below 4G, if

			available.

			[KNL, X86-64, ARM64, RISCV] range could be above 4G.

			Allow kernel to allocate physical memory region from top,

			so could be above 4G if system have more than 4G ram

			installed. Otherwise memory region will be allocated

			below 4G, if available.

			It will be ignored if crashkernel=X is specified.

	crashkernel=size[KMG],low

			[KNL, X86-64, ARM64] range under 4G. When crashkernel=X,high

			[KNL, X86-64, ARM64, RISCV] range under 4G. When crashkernel=X,high

			is passed, kernel could allocate physical memory region

			above 4G, that cause second kernel crash on system

			that require some amount of low memory, e.g. swiotlb

			size is	platform dependent.

			  --> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB)

			  --> arm64: 128MiB

			  --> riscv: 128MiB

			This one lets the user specify own low range under 4G

			for second kernel instead.

			0: to disable low allocation.

			[KNL] Disable ring 3 MONITOR/MWAIT feature on supported

			CPUs.

	riscv_isa_fallback [RISCV]

			When CONFIG_RISCV_ISA_FALLBACK is not enabled, permit

			falling back to detecting extension support by parsing

			"riscv,isa" property on devicetree systems when the

			replacement properties are not found. See the Kconfig

			entry for RISCV_ISA_FALLBACK.

	ro		[KNL] Mount root device read-only on boot

	rodata=		[KNL]

The default value is 8.

perf_user_access (arm64 only)

=================================

perf_user_access (arm64 and riscv only)

=======================================

Controls user space access for reading perf event counters.

Controls user space access for reading perf event counters. When set to 1,

user space can read performance monitor counter registers directly.

arm64

=====

The default value is 0 (access disabled).

When set to 1, user space can read performance monitor counter registers

directly.

See Documentation/arch/arm64/perf.rst for more information.

riscv

=====

When set to 0, user space access is disabled.

The default value is 1, user space can read performance monitor counter

registers through perf, any direct access without perf intervention will trigger

an illegal instruction.

When set to 2, which enables legacy mode (user space has direct access to cycle

and insret CSRs only). Note that this legacy value is deprecated and will be

removed once all user space applications are fixed.

Note that the time CSR is always directly accessible to all modes.

pid_max

=======

   ffffffff00000000 |  -4     GB | ffffffff7fffffff |    2 GB | modules, BPF

   ffffffff80000000 |  -2     GB | ffffffffffffffff |    2 GB | kernel

  __________________|____________|__________________|_________|____________________________________________________________

Userspace VAs

--------------------

To maintain compatibility with software that relies on the VA space with a

maximum of 48 bits the kernel will, by default, return virtual addresses to

userspace from a 48-bit range (sv48). This default behavior is achieved by

passing 0 into the hint address parameter of mmap. On CPUs with an address space

smaller than sv48, the CPU maximum supported address space will be the default.

Software can "opt-in" to receiving VAs from another VA space by providing

a hint address to mmap. A hint address passed to mmap will cause the largest

address space that fits entirely into the hint to be used, unless there is no

space left in the address space. If there is no space available in the requested

address space, an address in the next smallest available address space will be

returned.

For example, in order to obtain 48-bit VA space, a hint address greater than

:code:`1 << 47` must be provided. Note that this is 47 due to sv48 userspace

ending at :code:`1 << 47` and the addresses beyond this are reserved for the

kernel. Similarly, to obtain 57-bit VA space addresses, a hint address greater

than or equal to :code:`1 << 56` must be provided.

	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_SYSCALL_WRAPPER

	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

	select ARCH_HAS_UBSAN_SANITIZE_ALL

	select ARCH_HAS_VDSO_DATA

	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT

	select ARCH_STACKWALK

	select ARCH_SUPPORTS_ATOMIC_RMW

	select ARCH_SUPPORTS_CFI_CLANG

	select ARCH_SUPPORTS_DEBUG_PAGEALLOC if MMU

	select ARCH_SUPPORTS_HUGETLBFS if MMU

	select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU

	select ARCH_SUPPORTS_PER_VMA_LOCK if MMU

	select ARCH_USE_MEMTEST

	select ARCH_USE_QUEUED_RWLOCKS

	select ARCH_USES_CFI_TRAPS if CFI_CLANG

	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU

	select ARCH_WANT_FRAME_POINTERS

	select ARCH_WANT_GENERAL_HUGETLB if !RISCV_ISA_SVNAPOT

	select COMMON_CLK

	select CPU_PM if CPU_IDLE || HIBERNATION

	select EDAC_SUPPORT

	select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE)

	select GENERIC_ARCH_TOPOLOGY

	select GENERIC_ATOMIC64 if !64BIT

	select GENERIC_CLOCKEVENTS_BROADCAST if SMP

	select HAVE_PERF_REGS

	select HAVE_PERF_USER_STACK_DUMP

	select HAVE_POSIX_CPU_TIMERS_TASK_WORK

	select HAVE_PREEMPT_DYNAMIC_KEY if !XIP_KERNEL

	select HAVE_REGS_AND_STACK_ACCESS_API

	select HAVE_RETHOOK if !XIP_KERNEL

	select HAVE_RSEQ

	select ARCH_HAS_SETUP_DMA_OPS

	select ARCH_HAS_SYNC_DMA_FOR_CPU

	select ARCH_HAS_SYNC_DMA_FOR_DEVICE

	select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB

	select DMA_DIRECT_REMAP

config AS_HAS_INSN

	  be linked for and stored to.  This address is dependent on your

	  own flash usage.

config RISCV_ISA_FALLBACK

	bool "Permit falling back to parsing riscv,isa for extension support by default"

	default y

	help

	  Parsing the "riscv,isa" devicetree property has been deprecated and

	  replaced by a list of explicitly defined strings. For compatibility

	  with existing platforms, the kernel will fall back to parsing the

	  "riscv,isa" property if the replacements are not found.

	  Selecting N here will result in a kernel that does not use the

	  fallback, unless the commandline "riscv_isa_fallback" parameter is

	  present.

	  Please see the dt-binding, located at

	  Documentation/devicetree/bindings/riscv/extensions.yaml for details

	  on the replacement properties, "riscv,isa-base" and

	  "riscv,isa-extensions".

endmenu # "Boot options"

config BUILTIN_DTB

ifeq ($(CONFIG_CMODEL_MEDANY),y)

	KBUILD_CFLAGS += -mcmodel=medany

endif

ifeq ($(CONFIG_PERF_EVENTS),y)

        KBUILD_CFLAGS += -fno-omit-frame-pointer

endif

# Avoid generating .eh_frame sections.

KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables