# SPDX-License-Identifier: GPL-2.0
  # For a description of the syntax of this configuration file,
  # see Documentation/kbuild/kconfig-language.txt.
  
  config TILE
  	def_bool y
  	select ARCH_HAS_DEVMEM_IS_ALLOWED
  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
  	select ARCH_WANT_FRAME_POINTERS
  	select CC_OPTIMIZE_FOR_SIZE
  	select EDAC_SUPPORT
  	select GENERIC_CLOCKEVENTS
  	select GENERIC_FIND_FIRST_BIT
  	select GENERIC_IRQ_PROBE
  	select GENERIC_IRQ_SHOW
  	select GENERIC_PENDING_IRQ if SMP
  	select GENERIC_STRNCPY_FROM_USER
  	select GENERIC_STRNLEN_USER
  	select HAVE_ARCH_SECCOMP_FILTER
  	select HAVE_ARCH_TRACEHOOK
  	select HAVE_CONTEXT_TRACKING
  	select HAVE_DEBUG_BUGVERBOSE
  	select HAVE_DEBUG_KMEMLEAK
  	select HAVE_DEBUG_STACKOVERFLOW
  	select HAVE_DMA_API_DEBUG
  	select HAVE_EXIT_THREAD
  	select HAVE_KVM if !TILEGX
  	select HAVE_NMI if USE_PMC
  	select HAVE_PERF_EVENTS
  	select HAVE_SYSCALL_TRACEPOINTS
  	select MODULES_USE_ELF_RELA
  	select SYSCTL_EXCEPTION_TRACE
  	select SYS_HYPERVISOR
  	select USER_STACKTRACE_SUPPORT
  	select USE_PMC if PERF_EVENTS
  	select VIRT_TO_BUS
  
  config MMU
  	def_bool y
  
  config GENERIC_CSUM
  	def_bool y
  
  config HAVE_ARCH_ALLOC_REMAP
  	def_bool y
  
  config HAVE_SETUP_PER_CPU_AREA
  	def_bool y
  
  config NEED_PER_CPU_PAGE_FIRST_CHUNK
  	def_bool y
  
  config SYS_SUPPORTS_HUGETLBFS
  	def_bool y
  
  # Support for additional huge page sizes besides HPAGE_SIZE.
  # The software support is currently only present in the TILE-Gx
  # hypervisor. TILEPro in any case does not support page sizes
  # larger than the default HPAGE_SIZE.
  config HUGETLB_SUPER_PAGES
  	depends on HUGETLB_PAGE && TILEGX
  	def_bool y
  
  config GENERIC_TIME_VSYSCALL
  	def_bool y
  
  # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled.
  config USE_PMC
  	bool
  
  # FIXME: tilegx can implement a more efficient rwsem.
  config RWSEM_GENERIC_SPINLOCK
  	def_bool y
  
  # We only support gcc 4.4 and above, so this should work.
  config ARCH_SUPPORTS_OPTIMIZED_INLINING
  	def_bool y
  
  config ARCH_PHYS_ADDR_T_64BIT
  	def_bool y
  
  config ARCH_DMA_ADDR_T_64BIT
  	def_bool y
  
  config NEED_DMA_MAP_STATE
  	def_bool y
  
  config ARCH_HAS_DMA_SET_COHERENT_MASK
  	bool
  
  config LOCKDEP_SUPPORT
  	def_bool y
  
  config STACKTRACE_SUPPORT
  	def_bool y
  	select STACKTRACE
  
  # We use discontigmem for now; at some point we may want to switch
  # to sparsemem (Tilera bug 7996).
  config ARCH_DISCONTIGMEM_ENABLE
  	def_bool y
  
  config ARCH_DISCONTIGMEM_DEFAULT
  	def_bool y
  
  config TRACE_IRQFLAGS_SUPPORT
  	def_bool y
  
  # SMP is required for Tilera Linux.
  config SMP
  	def_bool y
  
  config HVC_TILE
  	depends on TTY
  	select HVC_DRIVER
  	select HVC_IRQ if TILEGX
  	def_bool y
  
  # Building with ARCH=tilegx (or ARCH=tile) implies using the
  # 64-bit TILE-Gx toolchain, so force CONFIG_TILEGX on.
  config TILEGX
  	def_bool ARCH != "tilepro"
  	select ARCH_SUPPORTS_ATOMIC_RMW
  	select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
  	select HAVE_ARCH_JUMP_LABEL
  	select HAVE_ARCH_KGDB
  	select HAVE_DYNAMIC_FTRACE
  	select HAVE_FTRACE_MCOUNT_RECORD
  	select HAVE_FUNCTION_GRAPH_TRACER
  	select HAVE_FUNCTION_TRACER
  	select HAVE_KPROBES
  	select HAVE_KRETPROBES
  	select SPARSE_IRQ
  
  config TILEPRO
  	def_bool !TILEGX
  
  config 64BIT
  	def_bool TILEGX
  
  config ARCH_DEFCONFIG
  	string
  	default "arch/tile/configs/tilepro_defconfig" if !TILEGX
  	default "arch/tile/configs/tilegx_defconfig" if TILEGX
  
  config PGTABLE_LEVELS
  	int
  	default 3 if 64BIT
  	default 2
  
  source "init/Kconfig"
  
  source "kernel/Kconfig.freezer"
  
  menu "Tilera-specific configuration"
  
  config NR_CPUS
  	int "Maximum number of tiles (2-255)"
  	range 2 255
  	depends on SMP
  	default "64"
  	---help---
  	  Building with 64 is the recommended value, but a slightly
  	  smaller kernel memory footprint results from using a smaller
  	  value on chips with fewer tiles.
  
  choice
  	prompt "Kernel page size"
  	default PAGE_SIZE_64KB
  	help
  	  This lets you select the page size of the kernel.  For best
  	  performance on memory-intensive applications, a page size of 64KB
  	  is recommended.  For workloads involving many small files, many
  	  connections, etc., it may be better to select 16KB, which uses
  	  memory more efficiently at some cost in TLB performance.
  
  	  Note that for TILEPro, you must also rebuild the hypervisor
  	  with a matching page size.
  
  config PAGE_SIZE_4KB
  	bool "4KB" if TILEPRO
  
  config PAGE_SIZE_16KB
  	bool "16KB"
  
  config PAGE_SIZE_64KB
  	bool "64KB"
  
  endchoice
  
  source "kernel/Kconfig.hz"
  
  config KEXEC
  	bool "kexec system call"
  	select KEXEC_CORE
  	---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.   It is used
  	  to implement the "mboot" Tilera booter.
  
  	  The name comes from the similarity to the exec system call.
  
  config COMPAT
  	bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
  	depends on TILEGX
  	select COMPAT_BINFMT_ELF
  	default y
  	---help---
  	  If enabled, the kernel will support running TILE-Gx binaries
  	  that were built with the -m32 option.
  
  config SECCOMP
  	bool "Enable seccomp to safely compute untrusted bytecode"
  	depends on PROC_FS
  	help
  	  This kernel feature is useful for number crunching applications
  	  that may need to compute untrusted bytecode during their
  	  execution. By using pipes or other transports made available to
  	  the process as file descriptors supporting the read/write
  	  syscalls, it's possible to isolate those applications in
  	  their own address space using seccomp. Once seccomp is
  	  enabled via prctl, it cannot be disabled and the task is only
  	  allowed to execute a few safe syscalls defined by each seccomp
  	  mode.
  
  	  If unsure, say N.
  
  config SYSVIPC_COMPAT
  	def_bool y
  	depends on COMPAT && SYSVIPC
  
  # We do not currently support disabling HIGHMEM on tilepro.
  config HIGHMEM
  	bool # "Support for more than 512 MB of RAM"
  	default !TILEGX
  	---help---
  	  Linux can use the full amount of RAM in the system by
  	  default.  However, the address space of TILE processors is
  	  only 4 Gigabytes large. That means that, if you have a large
  	  amount of physical memory, not all of it can be "permanently
  	  mapped" by the kernel. The physical memory that's not
  	  permanently mapped is called "high memory".
  
  	  If you are compiling a kernel which will never run on a
  	  machine with more than 512 MB total physical RAM, answer
  	  "false" here. This will result in the kernel mapping all of
  	  physical memory into the top 1 GB of virtual memory space.
  
  	  If unsure, say "true".
  
  config ZONE_DMA
  	def_bool y
  
  config IOMMU_HELPER
  	bool
  
  config NEED_SG_DMA_LENGTH
  	bool
  
  config SWIOTLB
  	bool
  	default TILEGX
  	select IOMMU_HELPER
  	select NEED_SG_DMA_LENGTH
  	select ARCH_HAS_DMA_SET_COHERENT_MASK
  
  # We do not currently support disabling NUMA.
  config NUMA
  	bool # "NUMA Memory Allocation and Scheduler Support"
  	depends on SMP && DISCONTIGMEM
  	default y
  	---help---
  	  NUMA memory allocation is required for TILE processors
  	  unless booting with memory striping enabled in the
  	  hypervisor, or with only a single memory controller.
  	  It is recommended that this option always be enabled.
  
  config NODES_SHIFT
  	int "Log base 2 of the max number of memory controllers"
  	default 2
  	depends on NEED_MULTIPLE_NODES
  	---help---
  	  By default, 2, i.e. 2^2 == 4 DDR2 controllers.
  	  In a system with more controllers, this value should be raised.
  
  choice
  	depends on !TILEGX
  	prompt "Memory split" if EXPERT
  	default VMSPLIT_3G
  	---help---
  	  Select the desired split between kernel and user memory.
  
  	  If the address range available to the kernel is less than the
  	  physical memory installed, the remaining memory will be available
  	  as "high memory". Accessing high memory is a little more costly
  	  than low memory, as it needs to be mapped into the kernel first.
  	  Note that increasing the kernel address space limits the range
  	  available to user programs, making the address space there
  	  tighter.  Selecting anything other than the default 3G/1G split
  	  will also likely make your kernel incompatible with binary-only
  	  kernel modules.
  
  	  If you are not absolutely sure what you are doing, leave this
  	  option alone!
  
  	config VMSPLIT_3_75G
  		bool "3.75G/0.25G user/kernel split (no kernel networking)"
  	config VMSPLIT_3_5G
  		bool "3.5G/0.5G user/kernel split"
  	config VMSPLIT_3G
  		bool "3G/1G user/kernel split"
  	config VMSPLIT_2_75G
  		bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
  	config VMSPLIT_2_5G
  		bool "2.5G/1.5G user/kernel split"
  	config VMSPLIT_2_25G
  		bool "2.25G/1.75G user/kernel split"
  	config VMSPLIT_2G
  		bool "2G/2G user/kernel split"
  	config VMSPLIT_1G
  		bool "1G/3G user/kernel split"
  endchoice
  
  config PAGE_OFFSET
  	hex
  	depends on !64BIT
  	default 0xF0000000 if VMSPLIT_3_75G
  	default 0xE0000000 if VMSPLIT_3_5G
  	default 0xB0000000 if VMSPLIT_2_75G
  	default 0xA0000000 if VMSPLIT_2_5G
  	default 0x90000000 if VMSPLIT_2_25G
  	default 0x80000000 if VMSPLIT_2G
  	default 0x40000000 if VMSPLIT_1G
  	default 0xC0000000
  
  source "mm/Kconfig"
  
  source "kernel/Kconfig.preempt"
  
  config CMDLINE_BOOL
  	bool "Built-in kernel command line"
  	default n
  	---help---
  	  Allow for specifying boot arguments to the kernel at
  	  build time.  On some systems (e.g. embedded ones), it is
  	  necessary or convenient to provide some or all of the
  	  kernel boot arguments with the kernel itself (that is,
  	  to not rely on the boot loader to provide them.)
  
  	  To compile command line arguments into the kernel,
  	  set this option to 'Y', then fill in the
  	  the boot arguments in CONFIG_CMDLINE.
  
  	  Systems with fully functional boot loaders (e.g. mboot, or
  	  if booting over PCI) should leave this option set to 'N'.
  
  config CMDLINE
  	string "Built-in kernel command string"
  	depends on CMDLINE_BOOL
  	default ""
  	---help---
  	  Enter arguments here that should be compiled into the kernel
  	  image and used at boot time.  If the boot loader provides a
  	  command line at boot time, it is appended to this string to
  	  form the full kernel command line, when the system boots.
  
  	  However, you can use the CONFIG_CMDLINE_OVERRIDE option to
  	  change this behavior.
  
  	  In most cases, the command line (whether built-in or provided
  	  by the boot loader) should specify the device for the root
  	  file system.
  
  config CMDLINE_OVERRIDE
  	bool "Built-in command line overrides boot loader arguments"
  	default n
  	depends on CMDLINE_BOOL
  	---help---
  	  Set this option to 'Y' to have the kernel ignore the boot loader
  	  command line, and use ONLY the built-in command line.
  
  	  This is used to work around broken boot loaders.  This should
  	  be set to 'N' under normal conditions.
  
  config VMALLOC_RESERVE
  	hex
  	default 0x2000000
  
  config HARDWALL
  	bool "Hardwall support to allow access to user dynamic network"
  	default y
  
  config KERNEL_PL
  	int "Processor protection level for kernel"
  	range 1 2
  	default 2 if TILEGX
  	default 1 if !TILEGX
  	---help---
  	  Since MDE 4.2, the Tilera hypervisor runs the kernel
  	  at PL2 by default.  If running under an older hypervisor,
  	  or as a KVM guest, you must run at PL1.  (The current
  	  hypervisor may also be recompiled with "make HV_PL=2" to
  	  allow it to run a kernel at PL1, but clients running at PL1
  	  are not expected to be supported indefinitely.)
  
  	  If you're not sure, don't change the default.
  
  source "arch/tile/gxio/Kconfig"
  
  endmenu  # Tilera-specific configuration
  
  menu "Bus options"
  
  config PCI
  	bool "PCI support"
  	default y
  	select PCI_DOMAINS
  	select GENERIC_PCI_IOMAP
  	select TILE_GXIO_TRIO if TILEGX
  	select PCI_MSI if TILEGX
  	---help---
  	  Enable PCI root complex support, so PCIe endpoint devices can
  	  be attached to the Tile chip.  Many, but not all, PCI devices
  	  are supported under Tilera's root complex driver.
  
  config PCI_DOMAINS
  	bool
  
  config NO_IOMEM
  	def_bool !PCI
  
  config NO_IOPORT_MAP
  	def_bool !PCI
  
  config TILE_PCI_IO
  	bool "PCI I/O space support"
  	default n
  	depends on PCI
  	depends on TILEGX
  	---help---
  	  Enable PCI I/O space support on TILEGx. Since the PCI I/O space
  	  is used by few modern PCIe endpoint devices, its support is disabled
  	  by default to save the TRIO PIO Region resource for other purposes.
  
  source "drivers/pci/Kconfig"
  
  config TILE_USB
  	tristate "Tilera USB host adapter support"
  	default y
  	depends on USB
  	depends on TILEGX
  	select TILE_GXIO_USB_HOST
  	---help---
  	  Provides USB host adapter support for the built-in EHCI and OHCI
  	  interfaces on TILE-Gx chips.
  
  endmenu
  
  menu "Executable file formats"
  
  source "fs/Kconfig.binfmt"
  
  endmenu
  
  source "net/Kconfig"
  
  source "drivers/Kconfig"
  
  source "fs/Kconfig"
  
  source "arch/tile/Kconfig.debug"
  
  source "security/Kconfig"
  
  source "crypto/Kconfig"
  
  source "lib/Kconfig"
  
  source "arch/tile/kvm/Kconfig"