^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) # SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) menu "Generic Driver Options"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) config UEVENT_HELPER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) bool "Support for uevent helper"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) The uevent helper program is forked by the kernel for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) every uevent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) Before the switch to the netlink-based uevent source, this was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) used to hook hotplug scripts into kernel device events. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) usually pointed to a shell script at /sbin/hotplug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) This should not be used today, because usual systems create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) many events at bootup or device discovery in a very short time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) frame. One forked process per event can create so many processes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) that it creates a high system load, or on smaller systems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) it is known to create out-of-memory situations during bootup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) config UEVENT_HELPER_PATH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) string "path to uevent helper"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) depends on UEVENT_HELPER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) default ""
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) To disable user space helper program execution at by default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) specify an empty string here. This setting can still be altered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) later at runtime.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) config DEVTMPFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) bool "Maintain a devtmpfs filesystem to mount at /dev"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) This creates a tmpfs/ramfs filesystem instance early at bootup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) In this filesystem, the kernel driver core maintains device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) nodes with their default names and permissions for all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) registered devices with an assigned major/minor number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) Userspace can modify the filesystem content as needed, add
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) symlinks, and apply needed permissions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) It provides a fully functional /dev directory, where usually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) udev runs on top, managing permissions and adding meaningful
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) symlinks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) In very limited environments, it may provide a sufficient
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) functional /dev without any further help. It also allows simple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) rescue systems, and reliably handles dynamic major/minor numbers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) Notice: if CONFIG_TMPFS isn't enabled, the simpler ramfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) file system will be used instead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) config DEVTMPFS_MOUNT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) bool "Automount devtmpfs at /dev, after the kernel mounted the rootfs"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) depends on DEVTMPFS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) This will instruct the kernel to automatically mount the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) devtmpfs filesystem at /dev, directly after the kernel has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) mounted the root filesystem. The behavior can be overridden
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) with the commandline parameter: devtmpfs.mount=0|1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) This option does not affect initramfs based booting, here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) the devtmpfs filesystem always needs to be mounted manually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) after the rootfs is mounted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) With this option enabled, it allows to bring up a system in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) rescue mode with init=/bin/sh, even when the /dev directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) on the rootfs is completely empty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) config STANDALONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) bool "Select only drivers that don't need compile-time external firmware"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) default y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) Select this option if you don't have magic firmware for drivers that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) need it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) If unsure, say Y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) config PREVENT_FIRMWARE_BUILD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) bool "Disable drivers features which enable custom firmware building"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) default y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) Say yes to disable driver features which enable building a custom
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) driver firmware at kernel build time. These drivers do not use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) kernel firmware API to load firmware (CONFIG_FW_LOADER), instead they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) use their own custom loading mechanism. The required firmware is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) usually shipped with the driver, building the driver firmware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) should only be needed if you have an updated firmware source.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) Firmware should not be being built as part of kernel, these days
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) you should always prevent this and say Y here. There are only two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) old drivers which enable building of its firmware at kernel build
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) time:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) o CONFIG_WANXL through CONFIG_WANXL_BUILD_FIRMWARE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) o CONFIG_SCSI_AIC79XX through CONFIG_AIC79XX_BUILD_FIRMWARE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) source "drivers/base/firmware_loader/Kconfig"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) config WANT_DEV_COREDUMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) Drivers should "select" this option if they desire to use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) device coredump mechanism.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) config ALLOW_DEV_COREDUMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) bool "Allow device coredump" if EXPERT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) default y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) This option controls if the device coredump mechanism is available or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) not; if disabled, the mechanism will be omitted even if drivers that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) can use it are enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Say 'N' for more sensitive systems or systems that don't want
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) to ever access the information to not have the code, nor keep any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) If unsure, say Y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) config DEV_COREDUMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) default y if WANT_DEV_COREDUMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) depends on ALLOW_DEV_COREDUMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) config DEBUG_DRIVER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) bool "Driver Core verbose debug messages"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) depends on DEBUG_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) Say Y here if you want the Driver core to produce a bunch of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) debug messages to the system log. Select this if you are having a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) problem with the driver core and want to see more of what is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) going on.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) If you are unsure about this, say N here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) config DEBUG_DEVRES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) bool "Managed device resources verbose debug messages"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) depends on DEBUG_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) This option enables kernel parameter devres.log. If set to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) non-zero, devres debug messages are printed. Select this if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) you are having a problem with devres or want to debug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) resource management for a managed device. devres.log can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) switched on and off from sysfs node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) If you are unsure about this, Say N here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) config DEBUG_TEST_DRIVER_REMOVE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) bool "Test driver remove calls during probe (UNSTABLE)"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) depends on DEBUG_KERNEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) Say Y here if you want the Driver core to test driver remove functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) by calling probe, remove, probe. This tests the remove path without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) having to unbind the driver or unload the driver module.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) This option is expected to find errors and may render your system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) unusable. You should say N here unless you are explicitly looking to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) test this functionality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) config PM_QOS_KUNIT_TEST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) bool "KUnit Test for PM QoS features" if !KUNIT_ALL_TESTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) depends on KUNIT=y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) default KUNIT_ALL_TESTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) config HMEM_REPORTING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) depends on NUMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) Enable reporting for heterogenous memory access attributes under
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) their non-uniform memory nodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) source "drivers/base/test/Kconfig"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) config SYS_HYPERVISOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) config GENERIC_CPU_DEVICES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) config GENERIC_CPU_AUTOPROBE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) config GENERIC_CPU_VULNERABILITIES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) config SOC_BUS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) select GLOB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) source "drivers/base/regmap/Kconfig"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) source "drivers/base/arm/Kconfig"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) config DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) default n
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) select IRQ_WORK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) This option enables the framework for buffer-sharing between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) multiple drivers. A buffer is associated with a file using driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) APIs extension; the file's descriptor can then be passed on to other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) config DMA_FENCE_TRACE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) bool "Enable verbose DMA_FENCE_TRACE messages"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) depends on DMA_SHARED_BUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) Enable the DMA_FENCE_TRACE printks. This will add extra
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) spam to the console log, but will make it easier to diagnose
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) lockup related problems for dma-buffers shared across multiple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) config GENERIC_ARCH_TOPOLOGY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) help
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) Enable support for architectures common topology code: e.g., parsing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) CPU capacity information from DT, usage of such information for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) appropriate scaling, sysfs interface for reading capacity values at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) runtime.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) endmenu
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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