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27 lines
1.4 KiB
Org Mode
27 lines
1.4 KiB
Org Mode
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#+title: Linux kernel options
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#+date: "2021-06-18 15:34:19 +08:00"
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#+date_modified: "2021-06-18 15:34:48 +08:00"
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#+language: en
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- [[https://wiki.gentoo.org/wiki/Kernel][Gentoo wiki page on kernels]]
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- Linux also has official documentation on kernel.org and tldp.org
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- the kernel is large today, most of which can be configured to be compiled or not;
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there is a default configuration when compiling the kernel
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- most of the features you would expect can be included
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+ run ELF binaries
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+ various filesystem support
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+ virtualization support
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+ Android drivers
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+ debugging options for kernel hacking
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+ pseudo-filesystems
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+ most drivers for common hardware (e.g., LED, USB, and network devices)
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+ special hardware drivers (e.g., Steam controller, Nintendo Wii)
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- most of the options can be configured either to be included inside of the kernel image or as an external module
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- most of the features are available as kernel options
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+ =CONFIG_HID_GENERIC= enables support for generic devices such as mice, keyboards, joysticks
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+ you can know what compile options is included from the kernel with =/proc/config.gz= but only if =CONFIG_IKCONFIG_PROC= is included
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+ =CONFIG_HID_BATTERY_STRENGTH= enables reporting battery strength
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- you can know what kernel options of the compiled kernel by looking at =/proc/config.gz= (e.g., ~gunzip --stdout /proc/config.gz | bat~);
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though, it is only possible if compiled with =CONFIG_IKCONFIG_PROC= option.
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