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Diffstat (limited to 'drivers/base/Kconfig')
| -rw-r--r-- | drivers/base/Kconfig | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig new file mode 100644 index 000000000..6f04b831a --- /dev/null +++ b/drivers/base/Kconfig @@ -0,0 +1,233 @@ +# SPDX-License-Identifier: GPL-2.0 +menu "Generic Driver Options" + +config AUXILIARY_BUS + bool + +config UEVENT_HELPER + bool "Support for uevent helper" + help + The uevent helper program is forked by the kernel for + every uevent. + Before the switch to the netlink-based uevent source, this was + used to hook hotplug scripts into kernel device events. It + usually pointed to a shell script at /sbin/hotplug. + This should not be used today, because usual systems create + many events at bootup or device discovery in a very short time + frame. One forked process per event can create so many processes + that it creates a high system load, or on smaller systems + it is known to create out-of-memory situations during bootup. + +config UEVENT_HELPER_PATH + string "path to uevent helper" + depends on UEVENT_HELPER + default "" + help + To disable user space helper program execution at by default + specify an empty string here. This setting can still be altered + via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper + later at runtime. + +config DEVTMPFS + bool "Maintain a devtmpfs filesystem to mount at /dev" + help + This creates a tmpfs/ramfs filesystem instance early at bootup. + In this filesystem, the kernel driver core maintains device + nodes with their default names and permissions for all + registered devices with an assigned major/minor number. + Userspace can modify the filesystem content as needed, add + symlinks, and apply needed permissions. + It provides a fully functional /dev directory, where usually + udev runs on top, managing permissions and adding meaningful + symlinks. + In very limited environments, it may provide a sufficient + functional /dev without any further help. It also allows simple + rescue systems, and reliably handles dynamic major/minor numbers. + + Notice: if CONFIG_TMPFS isn't enabled, the simpler ramfs + file system will be used instead. + +config DEVTMPFS_MOUNT + bool "Automount devtmpfs at /dev, after the kernel mounted the rootfs" + depends on DEVTMPFS + help + This will instruct the kernel to automatically mount the + devtmpfs filesystem at /dev, directly after the kernel has + mounted the root filesystem. The behavior can be overridden + with the commandline parameter: devtmpfs.mount=0|1. + This option does not affect initramfs based booting, here + the devtmpfs filesystem always needs to be mounted manually + after the rootfs is mounted. + With this option enabled, it allows to bring up a system in + rescue mode with init=/bin/sh, even when the /dev directory + on the rootfs is completely empty. + +config DEVTMPFS_SAFE + bool "Use nosuid,noexec mount options on devtmpfs" + depends on DEVTMPFS + help + This instructs the kernel to include the MS_NOEXEC and MS_NOSUID mount + flags when mounting devtmpfs. + + Notice: If enabled, things like /dev/mem cannot be mmapped + with the PROT_EXEC flag. This can break, for example, non-KMS + video drivers. + +config STANDALONE + bool "Select only drivers that don't need compile-time external firmware" + default y + help + Select this option if you don't have magic firmware for drivers that + need it. + + If unsure, say Y. + +config PREVENT_FIRMWARE_BUILD + bool "Disable drivers features which enable custom firmware building" + default y + help + Say yes to disable driver features which enable building a custom + driver firmware at kernel build time. These drivers do not use the + kernel firmware API to load firmware (CONFIG_FW_LOADER), instead they + use their own custom loading mechanism. The required firmware is + usually shipped with the driver, building the driver firmware + should only be needed if you have an updated firmware source. + + Firmware should not be being built as part of kernel, these days + you should always prevent this and say Y here. There are only two + old drivers which enable building of its firmware at kernel build + time: + + o CONFIG_WANXL through CONFIG_WANXL_BUILD_FIRMWARE + o CONFIG_SCSI_AIC79XX through CONFIG_AIC79XX_BUILD_FIRMWARE + +source "drivers/base/firmware_loader/Kconfig" + +config WANT_DEV_COREDUMP + bool + help + Drivers should "select" this option if they desire to use the + device coredump mechanism. + +config ALLOW_DEV_COREDUMP + bool "Allow device coredump" if EXPERT + default y + help + This option controls if the device coredump mechanism is available or + not; if disabled, the mechanism will be omitted even if drivers that + can use it are enabled. + Say 'N' for more sensitive systems or systems that don't want + to ever access the information to not have the code, nor keep any + data. + + If unsure, say Y. + +config DEV_COREDUMP + bool + default y if WANT_DEV_COREDUMP + depends on ALLOW_DEV_COREDUMP + +config DEBUG_DRIVER + bool "Driver Core verbose debug messages" + depends on DEBUG_KERNEL + help + Say Y here if you want the Driver core to produce a bunch of + debug messages to the system log. Select this if you are having a + problem with the driver core and want to see more of what is + going on. + + If you are unsure about this, say N here. + +config DEBUG_DEVRES + bool "Managed device resources verbose debug messages" + depends on DEBUG_KERNEL + help + This option enables kernel parameter devres.log. If set to + non-zero, devres debug messages are printed. Select this if + you are having a problem with devres or want to debug + resource management for a managed device. devres.log can be + switched on and off from sysfs node. + + If you are unsure about this, Say N here. + +config DEBUG_TEST_DRIVER_REMOVE + bool "Test driver remove calls during probe (UNSTABLE)" + depends on DEBUG_KERNEL + help + Say Y here if you want the Driver core to test driver remove functions + by calling probe, remove, probe. This tests the remove path without + having to unbind the driver or unload the driver module. + + This option is expected to find errors and may render your system + unusable. You should say N here unless you are explicitly looking to + test this functionality. + +config PM_QOS_KUNIT_TEST + bool "KUnit Test for PM QoS features" if !KUNIT_ALL_TESTS + depends on KUNIT=y + default KUNIT_ALL_TESTS + +config HMEM_REPORTING + bool + default n + depends on NUMA + help + Enable reporting for heterogeneous memory access attributes under + their non-uniform memory nodes. + +source "drivers/base/test/Kconfig" + +config SYS_HYPERVISOR + bool + default n + +config GENERIC_CPU_DEVICES + bool + default n + +config GENERIC_CPU_AUTOPROBE + bool + +config GENERIC_CPU_VULNERABILITIES + bool + +config SOC_BUS + bool + select GLOB + +source "drivers/base/regmap/Kconfig" + +config DMA_SHARED_BUFFER + bool + default n + select IRQ_WORK + help + This option enables the framework for buffer-sharing between + multiple drivers. A buffer is associated with a file using driver + APIs extension; the file's descriptor can then be passed on to other + driver. + +config DMA_FENCE_TRACE + bool "Enable verbose DMA_FENCE_TRACE messages" + depends on DMA_SHARED_BUFFER + help + Enable the DMA_FENCE_TRACE printks. This will add extra + spam to the console log, but will make it easier to diagnose + lockup related problems for dma-buffers shared across multiple + devices. + +config GENERIC_ARCH_TOPOLOGY + bool + help + Enable support for architectures common topology code: e.g., parsing + CPU capacity information from DT, usage of such information for + appropriate scaling, sysfs interface for reading capacity values at + runtime. + +config GENERIC_ARCH_NUMA + bool + help + Enable support for generic NUMA implementation. Currently, RISC-V + and ARM64 use it. + +endmenu |