169 lines
6.2 KiB
Plaintext
169 lines
6.2 KiB
Plaintext
menu "Generic Driver Options"
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config UEVENT_HELPER_PATH
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string "path to uevent helper"
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depends on HOTPLUG
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default "/sbin/hotplug"
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help
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Path to uevent helper program forked by the kernel for
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every uevent.
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config DEVTMPFS
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bool "Create a kernel maintained /dev tmpfs (EXPERIMENTAL)"
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depends on HOTPLUG && SHMEM && TMPFS
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help
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This creates a tmpfs filesystem, and mounts it at bootup
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and mounts it at /dev. The kernel driver core creates device
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nodes for all registered devices in that filesystem. All device
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nodes are owned by root and have the default mode of 0600.
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Userspace can add and delete the nodes as needed. This is
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intended to simplify bootup, and make it possible to delay
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the initial coldplug at bootup done by udev in userspace.
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It should also provide a simpler way for rescue systems
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to bring up a kernel with dynamic major/minor numbers.
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Meaningful symlinks, permissions and device ownership must
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still be handled by userspace.
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If unsure, say N here.
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config DEVTMPFS_MOUNT
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bool "Automount devtmpfs at /dev"
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depends on DEVTMPFS
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help
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This will mount devtmpfs at /dev if the kernel mounts the root
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filesystem. It will not affect initramfs based mounting.
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If unsure, say N here.
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config STANDALONE
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bool "Select only drivers that don't need compile-time external firmware" if EXPERIMENTAL
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default y
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help
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Select this option if you don't have magic firmware for drivers that
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need it.
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If unsure, say Y.
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config PREVENT_FIRMWARE_BUILD
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bool "Prevent firmware from being built"
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default y
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help
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Say yes to avoid building firmware. Firmware is usually shipped
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with the driver, and only when updating the firmware a rebuild
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should be made.
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If unsure say Y here.
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config FW_LOADER
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tristate "Userspace firmware loading support" if EMBEDDED
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depends on HOTPLUG
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default y
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---help---
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This option is provided for the case where no in-kernel-tree modules
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require userspace firmware loading support, but a module built outside
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the kernel tree does.
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config FIRMWARE_IN_KERNEL
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bool "Include in-kernel firmware blobs in kernel binary"
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depends on FW_LOADER
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default y
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help
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The kernel source tree includes a number of firmware 'blobs'
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which are used by various drivers. The recommended way to
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use these is to run "make firmware_install" and to copy the
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resulting binary files created in usr/lib/firmware directory
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of the kernel tree to the /lib/firmware on your system so
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that they can be loaded by userspace helpers on request.
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Enabling this option will build each required firmware blob
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into the kernel directly, where request_firmware() will find
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them without having to call out to userspace. This may be
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useful if your root file system requires a device which uses
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such firmware, and do not wish to use an initrd.
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This single option controls the inclusion of firmware for
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every driver which uses request_firmware() and ships its
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firmware in the kernel source tree, to avoid a proliferation
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of 'Include firmware for xxx device' options.
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Say 'N' and let firmware be loaded from userspace.
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config EXTRA_FIRMWARE
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string "External firmware blobs to build into the kernel binary"
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depends on FW_LOADER
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help
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This option allows firmware to be built into the kernel, for the
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cases where the user either cannot or doesn't want to provide it from
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userspace at runtime (for example, when the firmware in question is
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required for accessing the boot device, and the user doesn't want to
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use an initrd).
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This option is a string, and takes the (space-separated) names of the
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firmware files -- the same names which appear in MODULE_FIRMWARE()
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and request_firmware() in the source. These files should exist under
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the directory specified by the EXTRA_FIRMWARE_DIR option, which is
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by default the firmware/ subdirectory of the kernel source tree.
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So, for example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin",
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copy the usb8388.bin file into the firmware/ directory, and build the
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kernel. Then any request_firmware("usb8388.bin") will be
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satisfied internally without needing to call out to userspace.
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WARNING: If you include additional firmware files into your binary
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kernel image which are not available under the terms of the GPL,
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then it may be a violation of the GPL to distribute the resulting
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image -- since it combines both GPL and non-GPL work. You should
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consult a lawyer of your own before distributing such an image.
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config EXTRA_FIRMWARE_DIR
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string "Firmware blobs root directory"
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depends on EXTRA_FIRMWARE != ""
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default "firmware"
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help
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This option controls the directory in which the kernel build system
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looks for the firmware files listed in the EXTRA_FIRMWARE option.
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The default is the firmware/ directory in the kernel source tree,
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but by changing this option you can point it elsewhere, such as
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the /lib/firmware/ directory or another separate directory
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containing firmware files.
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config DEBUG_DRIVER
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bool "Driver Core verbose debug messages"
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depends on DEBUG_KERNEL
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help
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Say Y here if you want the Driver core to produce a bunch of
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debug messages to the system log. Select this if you are having a
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problem with the driver core and want to see more of what is
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going on.
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If you are unsure about this, say N here.
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config DEBUG_DEVRES
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bool "Managed device resources verbose debug messages"
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depends on DEBUG_KERNEL
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help
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This option enables kernel parameter devres.log. If set to
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non-zero, devres debug messages are printed. Select this if
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you are having a problem with devres or want to debug
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resource management for a managed device. devres.log can be
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switched on and off from sysfs node.
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If you are unsure about this, Say N here.
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config SYS_HYPERVISOR
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bool
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default n
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config GENLOCK
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bool "Enable a generic cross-process locking mechanism"
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depends on ANON_INODES
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help
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Enable a generic cross-process locking API to provide protection
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for shared memory objects such as graphics buffers.
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config GENLOCK_MISCDEVICE
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bool "Enable a misc-device for userspace to access the genlock engine"
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depends on GENLOCK
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help
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Create a miscdevice for the purposes of allowing userspace to create
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and interact with locks created using genlock.
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endmenu
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