[buildroot-mgba.git] / linux / Config.in

menu "Kernel"

config BR2_LINUX_KERNEL
	bool "Linux Kernel"
	select BR2_PACKAGE_HOST_IMAGEMAGICK if BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH != ""
	help
	  Enable this option if you want to build a Linux kernel for
	  your embedded device

if BR2_LINUX_KERNEL

# Packages that need to have a kernel with support for loadable modules,
# but do not use the kernel-modules infrastructure, should select that
# option.
config BR2_LINUX_NEEDS_MODULES
	bool

#
# Version selection. We provide the choice between:
#
#  1. A single fairly recent stable kernel version
#  2. A custom stable version
#  3. A custom tarball
#  4. A set of custom repository locations
#
choice
	prompt "Kernel version"

config BR2_LINUX_KERNEL_LATEST_VERSION
	bool "Latest version (5.6)"

config BR2_LINUX_KERNEL_LATEST_CIP_VERSION
	bool "Latest CIP SLTS version (4.19.98-cip19)"
	help
	  CIP launched in the spring of 2016 to address the needs of
	  organizations in industries such as power generation and
	  distribution, water, oil and gas, transportation, building
	  automation and more for reliable and secure Linux-based
	  embedded systems that can be sustained over a period of
	  10 to as many as 60 years.
	  The project's goal is to provide an open source base layer
	  of industrial-grade software that permits the use and
	  implementation of software building blocks that meet
	  these requirements.

	  The CIP community plans to maintain 4.4 for security and
	  bug fixes for more than 10 years.

	  https://www.cip-project.org

config BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
	bool "Latest CIP RT SLTS version (4.19.98-cip19-rt7)"
	help
	  Same as the CIP version, but this is the PREEMPT_RT realtime
	  variant.

	  The CIP community plans to maintain 4.19 for security and
	  bug fixes for more than 10 years.

	  https://www.cip-project.org

config BR2_LINUX_KERNEL_CUSTOM_VERSION
	bool "Custom version"
	help
	  This option allows to use a specific official version from
	  kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...

	  Note: you cannot use this option to select a _longterm_ 2.6
	  kernel, because these kernels are not located at the standard
	  URL at kernel.org. Instead, select "Custom tarball" and
	  specify the right URL directly.

config BR2_LINUX_KERNEL_CUSTOM_TARBALL
	bool "Custom tarball"
	help
	  This option allows to specify a URL pointing to a kernel
	  source tarball. This URL can use any protocol recognized by
	  Buildroot, like http://, ftp://, file:// or scp://.

	  When pointing to a local tarball using file://, you may want
	  to use a make variable like $(TOPDIR) to reference the root of
	  the Buildroot tree.

config BR2_LINUX_KERNEL_CUSTOM_GIT
	bool "Custom Git repository"
	help
	  This option allows Buildroot to get the Linux kernel source
	  code from a Git repository.

config BR2_LINUX_KERNEL_CUSTOM_HG
	bool "Custom Mercurial repository"
	help
	  This option allows Buildroot to get the Linux kernel source
	  code from a Mercurial repository.

config BR2_LINUX_KERNEL_CUSTOM_SVN
	bool "Custom Subversion repository"
	help
	  This option allows Buildroot to get the Linux kernel source
	  code from a Subversion repository.

endchoice

config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
	string "Kernel version"
	depends on BR2_LINUX_KERNEL_CUSTOM_VERSION

config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION
	string "URL of custom kernel tarball"
	depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL

if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG || BR2_LINUX_KERNEL_CUSTOM_SVN

config BR2_LINUX_KERNEL_CUSTOM_REPO_URL
	string "URL of custom repository"
	default BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL \
		if BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL != ""  # legacy

config BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION
	string "Custom repository version"
	default BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION \
		if BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION != ""  # legacy
	help
	  Revision to use in the typical format used by
	  Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..

endif

config BR2_LINUX_KERNEL_VERSION
	string
	default "5.6.7" if BR2_LINUX_KERNEL_LATEST_VERSION
	default "4.19.98-cip19" if BR2_LINUX_KERNEL_LATEST_CIP_VERSION
	default "4.19.98-cip19-rt7" if BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \
		if BR2_LINUX_KERNEL_CUSTOM_VERSION
	default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
	default BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION \
		if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG || BR2_LINUX_KERNEL_CUSTOM_SVN

#
# Patch selection
#

config BR2_LINUX_KERNEL_PATCH
	string "Custom kernel patches"
	help
	  A space-separated list of patches to apply to the
	  kernel. Each patch can be described as an URL, a local file
	  path, or a directory. In the case of a directory, all files
	  matching *.patch in the directory will be applied.

#
# Configuration selection
#

choice
	prompt "Kernel configuration"
	default BR2_LINUX_KERNEL_USE_DEFCONFIG

config BR2_LINUX_KERNEL_USE_DEFCONFIG
	bool "Using an in-tree defconfig file"

config BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG
	bool "Use the architecture default configuration"
	help
	  This option will use the default configuration for the
	  selected architecture. I.e, it is equivalent to running
	  "make ARCH=<foo> defconfig". This is useful on architectures
	  that have a single defconfig file, such as ARM64.

config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
	bool "Using a custom (def)config file"

endchoice

config BR2_LINUX_KERNEL_DEFCONFIG
	string "Defconfig name"
	depends on BR2_LINUX_KERNEL_USE_DEFCONFIG
	help
	  Name of the kernel defconfig file to use, without the
	  trailing _defconfig.  The defconfig is located in
	  arch/<arch>/configs in the kernel tree.

config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE
	string "Configuration file path"
	depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
	help
	  Path to the kernel configuration file

	  Note: this can be a defconfig file or a complete .config file,
	  which can later be saved back with make
	  linux-update-(def)config.

config BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES
	string "Additional configuration fragment files"
	help
	  A space-separated list of kernel configuration fragment files,
	  that will be merged to the main kernel configuration file.

config BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH
	string "Custom boot logo file path"
	help
	  Use a custom Linux framebuffer boot logo.
	  Custom logo should be in PNG or JPEG format, it will be
	  converted to the linux kernel format (224 colors only)
	  and copied over the original logo file.

#
# Binary format
#

choice
	prompt "Kernel binary format"
	default BR2_LINUX_KERNEL_ZIMAGE if BR2_arm || BR2_armeb

config BR2_LINUX_KERNEL_UIMAGE
	bool "uImage"
	depends on BR2_arc || BR2_arm || BR2_armeb || \
		   BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le || \
		   BR2_sh || BR2_mips || BR2_mipsel || \
		   BR2_mips64 || BR2_mips64el || BR2_xtensa
	select BR2_PACKAGE_HOST_UBOOT_TOOLS

config BR2_LINUX_KERNEL_APPENDED_UIMAGE
	bool "uImage with appended DT"
	depends on BR2_arm || BR2_armeb
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_APPENDED_DTB
	select BR2_PACKAGE_HOST_UBOOT_TOOLS

config BR2_LINUX_KERNEL_BZIMAGE
	bool "bzImage"
	depends on BR2_i386 || BR2_x86_64

config BR2_LINUX_KERNEL_ZIMAGE
	bool "zImage"
	depends on BR2_arm || BR2_armeb || BR2_powerpc || \
		   BR2_powerpc64 || BR2_powerpc64le || BR2_sparc || \
		   BR2_sh || BR2_xtensa

config BR2_LINUX_KERNEL_ZIMAGE_EPAPR
	bool "zImage.epapr"
	depends on BR2_powerpc64 || BR2_powerpc64le

config BR2_LINUX_KERNEL_APPENDED_ZIMAGE
	bool "zImage with appended DT"
	depends on BR2_arm || BR2_armeb
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_APPENDED_DTB

config BR2_LINUX_KERNEL_CUIMAGE
	bool "cuImage"
	depends on BR2_powerpc
	select BR2_PACKAGE_HOST_UBOOT_TOOLS
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT

config BR2_LINUX_KERNEL_SIMPLEIMAGE
	bool "simpleImage"
	depends on BR2_microblaze
	select BR2_PACKAGE_HOST_UBOOT_TOOLS
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT

config BR2_LINUX_KERNEL_IMAGE
	bool "Image"
	depends on BR2_aarch64 || BR2_riscv

config BR2_LINUX_KERNEL_LINUX_BIN
	bool "linux.bin"
	depends on BR2_microblaze
	select BR2_PACKAGE_HOST_UBOOT_TOOLS

config BR2_LINUX_KERNEL_VMLINUX_BIN
	bool "vmlinux.bin"
	depends on BR2_mips || BR2_mipsel || BR2_sh

config BR2_LINUX_KERNEL_VMLINUX
	bool "vmlinux"

config BR2_LINUX_KERNEL_VMLINUZ
	bool "vmlinuz"
	depends on BR2_mips || BR2_mipsel

config BR2_LINUX_KERNEL_VMLINUZ_BIN
	bool "vmlinuz.bin"
	depends on BR2_mips || BR2_mipsel

config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	bool "custom target"
	help
	  For certain cases a board-specific target image must be
	  used.  For example, on powerPC where the OpenFirmware
	  description is attached in a board-specific kernel image
	  target like 'cuImage.mpc8379_rdb'.

	  Select this option and specify the make target in "Kernel
	  image target name".

endchoice

#
# Kernel compression format
#

choice
	prompt "Kernel compression format"
	help
	  This selection will just ensure that the correct host tools
	  are built. The actual compression for the kernel should be
	  selected in the kernel configuration menu.

config BR2_LINUX_KERNEL_GZIP
	bool "gzip compression"

config BR2_LINUX_KERNEL_LZ4
	bool "lz4 compression"

config BR2_LINUX_KERNEL_LZMA
	bool "lzma compression"

config BR2_LINUX_KERNEL_LZO
	bool "lzo compression"

config BR2_LINUX_KERNEL_XZ
	bool "xz compression"

endchoice

config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
	string "Kernel image target name"
	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	help
	  Specify the kernel make target to build the kernel that you
	  need.

config BR2_LINUX_KERNEL_IMAGE_NAME
	string "Kernel image name"
	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	help
	  The filename of the kernel image, if it is different from
	  the make target (above). Defaults to
	  BR2_LINUX_KERNEL_IMAGE_TARGET_NAME. If specified, the
	  filename is relative to arch/ARCH/boot/.

	  If unsure, leave it empty.

config BR2_LINUX_KERNEL_UIMAGE_LOADADDR
	string "load address (for 3.7+ multi-platform image)"
	depends on BR2_arm || BR2_armeb
	depends on BR2_LINUX_KERNEL_UIMAGE || BR2_LINUX_KERNEL_APPENDED_UIMAGE
	help
	  If your ARM system's Linux kernel is configured with the new
	  (3.7+) multi-architecture support (CONFIG_ARCH_MULTIPLATFORM=y
	  in your kernel config), then it is necessary to specify a
	  kernel load address when building the uImage. This should be a
	  hexadecimal string beginning with 0x, for example: 0x00008000.

	  If unsure, let this option empty.

config BR2_LINUX_KERNEL_DTS_SUPPORT
	bool "Build a Device Tree Blob (DTB)"
	help
	  Compile one or more device tree sources into device tree
	  blobs.
	  Select the dts files to compile in the options below.

if BR2_LINUX_KERNEL_DTS_SUPPORT

# We have mainly three cases when it comes to device tree support:
#   1) We don't want any support at all. Then the ..DTS_SUPPORT
#      variable won't be set
#   2) We want device tree support, so we need the user to enter the
#      device tree name or the path to the custom device he uses, but
#      the kernel abstracts this from us and only build an image that
#      looks like a regular kernel image. In this case, we only need
#      to derive the kernel image name from the given device tree
#      name, and all the rest is as usual
#   3) We want device tree support, but the kernel requires us to
#      build the device tree blob separately. In this case, some
#      more logic will be needed.
# The variable below address the second case, were you only want
# limited actions from buildroot.
config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
	bool "DTB is built by kernel itself"
	help
	  Normally, the device tree(s) to be built have to be passed
	  explicitly to the kernel build system. For some binary
	  formats, however, the kernel build system links in the
	  device tree directly in the kernel binary. Select this option
	  if you have such a kernel binary format.

config BR2_LINUX_KERNEL_APPENDED_DTB
	bool

config BR2_LINUX_KERNEL_INTREE_DTS_NAME
	string "In-tree Device Tree Source file names"
	help
	  Name of in-tree device tree source file, without
	  the trailing .dts. You can provide a list of
	  dts files to build, separated by spaces.

config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH
	string "Out-of-tree Device Tree Source file paths"
	help
	  Path to to out-of-tree device tree source files.
	  You can provide a list of dts paths to copy and
	  build, separated by spaces.

config BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT
	bool "Build Device Tree with overlay support"
	help
	  If enabled, pass the "-@" option to dtc, such that
	  symbols are generated in the compiled Device Tree.
	  Choose this option to support Device Tree overlays
	  on the target system.

endif

config BR2_LINUX_KERNEL_INSTALL_TARGET
	bool "Install kernel image to /boot in target"
	depends on !BR2_TARGET_ROOTFS_INITRAMFS
	help
	  Select this option to have the kernel image installed to
	  /boot in the target root filesystem, as is typically done on
	  x86/x86_64 systems.

	  Note that this option also installs the Device Tree Blobs to
	  /boot if DTBs have been generated by the kernel build
	  process.

config BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL
	bool "Needs host OpenSSL"
	help
	  Some Linux kernel configuration options (such as
	  CONFIG_SYSTEM_TRUSTED_KEYRING) require building a host
	  program called extract-cert, which itself needs
	  OpenSSL. Enabling this option will ensure host-openssl gets
	  built before the Linux kernel.

	  Enable this option if you get a Linux kernel build failure
	  such as "scripts/extract-cert.c:21:25: fatal error:
	  openssl/bio.h: No such file or directory".

config BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF
	bool "Needs host libelf"
	help
	  Some Linux kernel configuration options (such as
	  CONFIG_UNWINDER_ORC) require building a host program that
	  needs libelf. Enabling this option will ensure host-elfutils
	  (which provides libelf) gets built before the Linux kernel.

	  Enable this option if you get a Linux kernel build failure
	  such as "Cannot generate ORC metadata for
	  CONFIG_UNWINDER_ORC=y, please install libelf-dev,
	  libelf-devel or elfutils-libelf-devel".

# Linux extensions
source "linux/Config.ext.in"

# Linux tools
source "package/linux-tools/Config.in"

endif # BR2_LINUX_KERNEL

endmenu
Commit	Line	Data
487e21cf TP	1	menu "Kernel"
	2
	3	config BR2_LINUX_KERNEL
	4	bool "Linux Kernel"
39719172	5	select BR2_PACKAGE_HOST_IMAGEMAGICK if BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH != ""
487e21cf TP	6	help
	7	Enable this option if you want to build a Linux kernel for
	8	your embedded device
	9
	10	if BR2_LINUX_KERNEL
	11
5471bac7 YM	12	# Packages that need to have a kernel with support for loadable modules,
	13	# but do not use the kernel-modules infrastructure, should select that
	14	# option.
	15	config BR2_LINUX_NEEDS_MODULES
	16	bool
	17
487e21cf TP	18	#
	19	# Version selection. We provide the choice between:
	20	#
	21	# 1. A single fairly recent stable kernel version
cc3f8bc1 YM	22	# 2. A custom stable version
	23	# 3. A custom tarball
	24	# 4. A set of custom repository locations
487e21cf TP	25	#
	26	choice
	27	prompt "Kernel version"
487e21cf	28
c719ded2	29	config BR2_LINUX_KERNEL_LATEST_VERSION
d1f002c4	30	bool "Latest version (5.6)"
487e21cf	31
31d4fa76	32	config BR2_LINUX_KERNEL_LATEST_CIP_VERSION
14bc8519	33	bool "Latest CIP SLTS version (4.19.98-cip19)"
31d4fa76 AC	34	help
	35	CIP launched in the spring of 2016 to address the needs of
	36	organizations in industries such as power generation and
	37	distribution, water, oil and gas, transportation, building
	38	automation and more for reliable and secure Linux-based
	39	embedded systems that can be sustained over a period of
	40	10 to as many as 60 years.
	41	The project's goal is to provide an open source base layer
	42	of industrial-grade software that permits the use and
	43	implementation of software building blocks that meet
	44	these requirements.
	45
	46	The CIP community plans to maintain 4.4 for security and
	47	bug fixes for more than 10 years.
	48
	49	https://www.cip-project.org
	50
e9daff62	51	config BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
cba1aa49	52	bool "Latest CIP RT SLTS version (4.19.98-cip19-rt7)"
e9daff62 AC	53	help
	54	Same as the CIP version, but this is the PREEMPT_RT realtime
	55	variant.
	56
	57	The CIP community plans to maintain 4.19 for security and
	58	bug fixes for more than 10 years.
	59
	60	https://www.cip-project.org
	61
487e21cf TP	62	config BR2_LINUX_KERNEL_CUSTOM_VERSION
	63	bool "Custom version"
	64	help
d6bb2b50 TDS	65	This option allows to use a specific official version from
d6bb2b50 TDS	66	kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...
487e21cf	67
a1ede0a5 TDS	68	Note: you cannot use this option to select a _longterm_ 2.6
	69	kernel, because these kernels are not located at the standard
	70	URL at kernel.org. Instead, select "Custom tarball" and
	71	specify the right URL directly.
	72
487e21cf TP	73	config BR2_LINUX_KERNEL_CUSTOM_TARBALL
	74	bool "Custom tarball"
	75	help
4b95cf8d RM	76	This option allows to specify a URL pointing to a kernel
	77	source tarball. This URL can use any protocol recognized by
	78	Buildroot, like http://, ftp://, file:// or scp://.
74243211	79
4b95cf8d RM	80	When pointing to a local tarball using file://, you may want
	81	to use a make variable like $(TOPDIR) to reference the root of
	82	the Buildroot tree.
487e21cf	83
205fb19c	84	config BR2_LINUX_KERNEL_CUSTOM_GIT
4bff6145	85	bool "Custom Git repository"
205fb19c TP	86	help
	87	This option allows Buildroot to get the Linux kernel source
	88	code from a Git repository.
	89
63ecded2 TDS	90	config BR2_LINUX_KERNEL_CUSTOM_HG
	91	bool "Custom Mercurial repository"
	92	help
	93	This option allows Buildroot to get the Linux kernel source
	94	code from a Mercurial repository.
	95
986fa441 PS	96	config BR2_LINUX_KERNEL_CUSTOM_SVN
	97	bool "Custom Subversion repository"
	98	help
	99	This option allows Buildroot to get the Linux kernel source
	100	code from a Subversion repository.
	101
487e21cf TP	102	endchoice
	103
	104	config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
	105	string "Kernel version"
	106	depends on BR2_LINUX_KERNEL_CUSTOM_VERSION
487e21cf TP	107
	108	config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION
	109	string "URL of custom kernel tarball"
	110	depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL
	111
986fa441	112	if BR2_LINUX_KERNEL_CUSTOM_GIT \|\| BR2_LINUX_KERNEL_CUSTOM_HG \|\| BR2_LINUX_KERNEL_CUSTOM_SVN
205fb19c	113
63ecded2 TDS	114	config BR2_LINUX_KERNEL_CUSTOM_REPO_URL
	115	string "URL of custom repository"
	116	default BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL \
	117	if BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL != "" # legacy
	118
	119	config BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION
	120	string "Custom repository version"
	121	default BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION \
	122	if BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION != "" # legacy
babd953f	123	help
4b95cf8d RM	124	Revision to use in the typical format used by
4b95cf8d RM	125	Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..
205fb19c	126
63ecded2 TDS	127	endif
63ecded2 TDS	128
487e21cf TP	129	config BR2_LINUX_KERNEL_VERSION
487e21cf TP	130	string
72a6e50d	131	default "5.6.7" if BR2_LINUX_KERNEL_LATEST_VERSION
14bc8519	132	default "4.19.98-cip19" if BR2_LINUX_KERNEL_LATEST_CIP_VERSION
cba1aa49	133	default "4.19.98-cip19-rt7" if BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
63ecded2 TDS	134	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \
63ecded2 TDS	135	if BR2_LINUX_KERNEL_CUSTOM_VERSION
487e21cf	136	default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
63ecded2	137	default BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION \
986fa441	138	if BR2_LINUX_KERNEL_CUSTOM_GIT \|\| BR2_LINUX_KERNEL_CUSTOM_HG \|\| BR2_LINUX_KERNEL_CUSTOM_SVN
487e21cf TP	139
	140	#
	141	# Patch selection
	142	#
	143
	144	config BR2_LINUX_KERNEL_PATCH
55b0a375	145	string "Custom kernel patches"
487e21cf	146	help
55b0a375 TP	147	A space-separated list of patches to apply to the
	148	kernel. Each patch can be described as an URL, a local file
	149	path, or a directory. In the case of a directory, all files
0eba4759	150	matching *.patch in the directory will be applied.
487e21cf TP	151
	152	#
	153	# Configuration selection
	154	#
	155
	156	choice
	157	prompt "Kernel configuration"
	158	default BR2_LINUX_KERNEL_USE_DEFCONFIG
	159
	160	config BR2_LINUX_KERNEL_USE_DEFCONFIG
18215323	161	bool "Using an in-tree defconfig file"
487e21cf	162
53ced1f6 TP	163	config BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG
	164	bool "Use the architecture default configuration"
	165	help
	166	This option will use the default configuration for the
	167	selected architecture. I.e, it is equivalent to running
	168	"make ARCH=<foo> defconfig". This is useful on architectures
	169	that have a single defconfig file, such as ARM64.
	170
487e21cf	171	config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
18215323	172	bool "Using a custom (def)config file"
487e21cf TP	173
	174	endchoice
	175
	176	config BR2_LINUX_KERNEL_DEFCONFIG
	177	string "Defconfig name"
	178	depends on BR2_LINUX_KERNEL_USE_DEFCONFIG
	179	help
bed4e278 TDS	180	Name of the kernel defconfig file to use, without the
	181	trailing _defconfig. The defconfig is located in
	182	arch/<arch>/configs in the kernel tree.
487e21cf TP	183
	184	config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE
	185	string "Configuration file path"
	186	depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
	187	help
	188	Path to the kernel configuration file
	189
18215323	190	Note: this can be a defconfig file or a complete .config file,
4b95cf8d RM	191	which can later be saved back with make
4b95cf8d RM	192	linux-update-(def)config.
18215323	193
87bd1e37 FB	194	config BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES
	195	string "Additional configuration fragment files"
	196	help
	197	A space-separated list of kernel configuration fragment files,
	198	that will be merged to the main kernel configuration file.
	199
551e48a8 AC	200	config BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH
	201	string "Custom boot logo file path"
	202	help
	203	Use a custom Linux framebuffer boot logo.
	204	Custom logo should be in PNG or JPEG format, it will be
	205	converted to the linux kernel format (224 colors only)
	206	and copied over the original logo file.
	207
487e21cf TP	208	#
	209	# Binary format
	210	#
	211
	212	choice
	213	prompt "Kernel binary format"
5c67cb1d	214	default BR2_LINUX_KERNEL_ZIMAGE if BR2_arm \|\| BR2_armeb
487e21cf TP	215
	216	config BR2_LINUX_KERNEL_UIMAGE
	217	bool "uImage"
e55f21a9	218	depends on BR2_arc \|\| BR2_arm \|\| BR2_armeb \|\| \
1afd174f	219	BR2_powerpc \|\| BR2_powerpc64 \|\| BR2_powerpc64le \|\| \
4338a319	220	BR2_sh \|\| BR2_mips \|\| BR2_mipsel \|\| \
fd5b71af	221	BR2_mips64 \|\| BR2_mips64el \|\| BR2_xtensa
ee995b18	222	select BR2_PACKAGE_HOST_UBOOT_TOOLS
487e21cf	223
978928e4 MR	224	config BR2_LINUX_KERNEL_APPENDED_UIMAGE
	225	bool "uImage with appended DT"
	226	depends on BR2_arm \|\| BR2_armeb
	227	select BR2_LINUX_KERNEL_DTS_SUPPORT
	228	select BR2_LINUX_KERNEL_APPENDED_DTB
ee995b18	229	select BR2_PACKAGE_HOST_UBOOT_TOOLS
978928e4	230
487e21cf TP	231	config BR2_LINUX_KERNEL_BZIMAGE
487e21cf TP	232	bool "bzImage"
b626dc07	233	depends on BR2_i386 \|\| BR2_x86_64
487e21cf TP	234
	235	config BR2_LINUX_KERNEL_ZIMAGE
	236	bool "zImage"
7e674dfa CS	237	depends on BR2_arm \|\| BR2_armeb \|\| BR2_powerpc \|\| \
7e674dfa CS	238	BR2_powerpc64 \|\| BR2_powerpc64le \|\| BR2_sparc \|\| \
4338a319	239	BR2_sh \|\| BR2_xtensa
487e21cf	240
dc3935ea JK	241	config BR2_LINUX_KERNEL_ZIMAGE_EPAPR
	242	bool "zImage.epapr"
	243	depends on BR2_powerpc64 \|\| BR2_powerpc64le
	244
978928e4 MR	245	config BR2_LINUX_KERNEL_APPENDED_ZIMAGE
	246	bool "zImage with appended DT"
	247	depends on BR2_arm \|\| BR2_armeb
	248	select BR2_LINUX_KERNEL_DTS_SUPPORT
	249	select BR2_LINUX_KERNEL_APPENDED_DTB
	250
18e752de MR	251	config BR2_LINUX_KERNEL_CUIMAGE
	252	bool "cuImage"
	253	depends on BR2_powerpc
ee995b18	254	select BR2_PACKAGE_HOST_UBOOT_TOOLS
18e752de MR	255	select BR2_LINUX_KERNEL_DTS_SUPPORT
	256	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
	257
	258	config BR2_LINUX_KERNEL_SIMPLEIMAGE
	259	bool "simpleImage"
	260	depends on BR2_microblaze
ee995b18	261	select BR2_PACKAGE_HOST_UBOOT_TOOLS
18e752de MR	262	select BR2_LINUX_KERNEL_DTS_SUPPORT
	263	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
	264
55a6b6d0 AV	265	config BR2_LINUX_KERNEL_IMAGE
55a6b6d0 AV	266	bool "Image"
a3a4d4d4	267	depends on BR2_aarch64 \|\| BR2_riscv
55a6b6d0	268
18e752de MR	269	config BR2_LINUX_KERNEL_LINUX_BIN
	270	bool "linux.bin"
	271	depends on BR2_microblaze
ee995b18	272	select BR2_PACKAGE_HOST_UBOOT_TOOLS
18e752de	273
b626dc07 TP	274	config BR2_LINUX_KERNEL_VMLINUX_BIN
b626dc07 TP	275	bool "vmlinux.bin"
4338a319	276	depends on BR2_mips \|\| BR2_mipsel \|\| BR2_sh
487e21cf	277
71c05023 TP	278	config BR2_LINUX_KERNEL_VMLINUX
71c05023 TP	279	bool "vmlinux"
71c05023	280
c1485d51 KC	281	config BR2_LINUX_KERNEL_VMLINUZ
	282	bool "vmlinuz"
	283	depends on BR2_mips \|\| BR2_mipsel
	284
e9d2d024 YY	285	config BR2_LINUX_KERNEL_VMLINUZ_BIN
	286	bool "vmlinuz.bin"
	287	depends on BR2_mips \|\| BR2_mipsel
	288
e2ed6c8e MH	289	config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	290	bool "custom target"
	291	help
	292	For certain cases a board-specific target image must be
	293	used. For example, on powerPC where the OpenFirmware
	294	description is attached in a board-specific kernel image
	295	target like 'cuImage.mpc8379_rdb'.
	296
	297	Select this option and specify the make target in "Kernel
	298	image target name".
	299
487e21cf TP	300	endchoice
487e21cf TP	301
3ea133c9 JS	302	#
	303	# Kernel compression format
	304	#
	305
	306	choice
	307	prompt "Kernel compression format"
	308	help
4b95cf8d RM	309	This selection will just ensure that the correct host tools
	310	are built. The actual compression for the kernel should be
	311	selected in the kernel configuration menu.
3ea133c9 JS	312
	313	config BR2_LINUX_KERNEL_GZIP
	314	bool "gzip compression"
	315
	316	config BR2_LINUX_KERNEL_LZ4
	317	bool "lz4 compression"
	318
	319	config BR2_LINUX_KERNEL_LZMA
	320	bool "lzma compression"
	321
	322	config BR2_LINUX_KERNEL_LZO
	323	bool "lzo compression"
	324
	325	config BR2_LINUX_KERNEL_XZ
	326	bool "xz compression"
	327
	328	endchoice
	329
e2ed6c8e MH	330	config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
	331	string "Kernel image target name"
	332	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	333	help
	334	Specify the kernel make target to build the kernel that you
	335	need.
	336
c78d5763 WB	337	config BR2_LINUX_KERNEL_IMAGE_NAME
	338	string "Kernel image name"
	339	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	340	help
ea044ee2 TP	341	The filename of the kernel image, if it is different from
	342	the make target (above). Defaults to
	343	BR2_LINUX_KERNEL_IMAGE_TARGET_NAME. If specified, the
	344	filename is relative to arch/ARCH/boot/.
c78d5763 WB	345
	346	If unsure, leave it empty.
	347
8215e19b JB	348	config BR2_LINUX_KERNEL_UIMAGE_LOADADDR
	349	string "load address (for 3.7+ multi-platform image)"
	350	depends on BR2_arm \|\| BR2_armeb
	351	depends on BR2_LINUX_KERNEL_UIMAGE \|\| BR2_LINUX_KERNEL_APPENDED_UIMAGE
	352	help
4b95cf8d RM	353	If your ARM system's Linux kernel is configured with the new
	354	(3.7+) multi-architecture support (CONFIG_ARCH_MULTIPLATFORM=y
	355	in your kernel config), then it is necessary to specify a
	356	kernel load address when building the uImage. This should be a
	357	hexadecimal string beginning with 0x, for example: 0x00008000.
8215e19b JB	358
	359	If unsure, let this option empty.
	360
69fc497d	361	config BR2_LINUX_KERNEL_DTS_SUPPORT
be529e22	362	bool "Build a Device Tree Blob (DTB)"
69fc497d	363	help
4b95cf8d RM	364	Compile one or more device tree sources into device tree
4b95cf8d RM	365	blobs.
be529e22	366	Select the dts files to compile in the options below.
69fc497d MR	367
	368	if BR2_LINUX_KERNEL_DTS_SUPPORT
	369
978928e4 MR	370	# We have mainly three cases when it comes to device tree support:
	371	# 1) We don't want any support at all. Then the ..DTS_SUPPORT
	372	# variable won't be set
5b686a06 MY	373	# 2) We want device tree support, so we need the user to enter the
	374	# device tree name or the path to the custom device he uses, but
	375	# the kernel abstracts this from us and only build an image that
	376	# looks like a regular kernel image. In this case, we only need
	377	# to derive the kernel image name from the given device tree
	378	# name, and all the rest is as usual
978928e4 MR	379	# 3) We want device tree support, but the kernel requires us to
	380	# build the device tree blob separately. In this case, some
	381	# more logic will be needed.
	382	# The variable below address the second case, were you only want
	383	# limited actions from buildroot.
	384	config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
869773d6 PW	385	bool "DTB is built by kernel itself"
	386	help
	387	Normally, the device tree(s) to be built have to be passed
	388	explicitly to the kernel build system. For some binary
	389	formats, however, the kernel build system links in the
	390	device tree directly in the kernel binary. Select this option
	391	if you have such a kernel binary format.
978928e4 MR	392
	393	config BR2_LINUX_KERNEL_APPENDED_DTB
	394	bool
	395
69fc497d	396	config BR2_LINUX_KERNEL_INTREE_DTS_NAME
f142f23e	397	string "In-tree Device Tree Source file names"
69fc497d	398	help
f142f23e	399	Name of in-tree device tree source file, without
bed4e278 TDS	400	the trailing .dts. You can provide a list of
bed4e278 TDS	401	dts files to build, separated by spaces.
69fc497d MR	402
69fc497d MR	403	config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH
f142f23e	404	string "Out-of-tree Device Tree Source file paths"
69fc497d	405	help
f142f23e YM	406	Path to to out-of-tree device tree source files.
	407	You can provide a list of dts paths to copy and
	408	build, separated by spaces.
69fc497d	409
eb37deb6 TC	410	config BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT
	411	bool "Build Device Tree with overlay support"
	412	help
	413	If enabled, pass the "-@" option to dtc, such that
	414	symbols are generated in the compiled Device Tree.
	415	Choose this option to support Device Tree overlays
	416	on the target system.
	417
69fc497d MR	418	endif
69fc497d MR	419
eff25f4c TP	420	config BR2_LINUX_KERNEL_INSTALL_TARGET
	421	bool "Install kernel image to /boot in target"
	422	depends on !BR2_TARGET_ROOTFS_INITRAMFS
	423	help
	424	Select this option to have the kernel image installed to
	425	/boot in the target root filesystem, as is typically done on
	426	x86/x86_64 systems.
	427
e2a52885 TP	428	Note that this option also installs the Device Tree Blobs to
	429	/boot if DTBs have been generated by the kernel build
	430	process.
3011d235	431
93a7edf4 TP	432	config BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL
	433	bool "Needs host OpenSSL"
	434	help
	435	Some Linux kernel configuration options (such as
	436	CONFIG_SYSTEM_TRUSTED_KEYRING) require building a host
	437	program called extract-cert, which itself needs
	438	OpenSSL. Enabling this option will ensure host-openssl gets
	439	built before the Linux kernel.
	440
	441	Enable this option if you get a Linux kernel build failure
	442	such as "scripts/extract-cert.c:21:25: fatal error:
	443	openssl/bio.h: No such file or directory".
	444
f7cd72b3 TP	445	config BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF
	446	bool "Needs host libelf"
	447	help
	448	Some Linux kernel configuration options (such as
	449	CONFIG_UNWINDER_ORC) require building a host program that
	450	needs libelf. Enabling this option will ensure host-elfutils
	451	(which provides libelf) gets built before the Linux kernel.
	452
	453	Enable this option if you get a Linux kernel build failure
	454	such as "Cannot generate ORC metadata for
	455	CONFIG_UNWINDER_ORC=y, please install libelf-dev,
	456	libelf-devel or elfutils-libelf-devel".
	457
3011d235 TDS	458	# Linux extensions
	459	source "linux/Config.ext.in"
	460
f1863ede	461	# Linux tools
20b14466	462	source "package/linux-tools/Config.in"
f1863ede	463
487e21cf TP	464	endif # BR2_LINUX_KERNEL
	465
	466	endmenu