Documentation/admin-guide/kernel-parameters.rst

6 The following is a consolidated list of the kernel parameters as
16 Everything after "``--``" is passed as an argument to init.
46 nohz_full, irqaffinity, rcu_nocbs.  The format of this list is:
81 enabled and if respective hardware is present. The text in square brackets at
83 parameter is applicable::
85 	ACPI	ACPI support is enabled.
86 	AGP	AGP (Accelerated Graphics Port) is enabled.
87 	ALSA	ALSA sound support is enabled.
88 	APIC	APIC support is enabled.
89 	APM	Advanced Power Management support is enabled.
90 	ARM	ARM architecture is enabled.
91 	ARM64	ARM64 architecture is enabled.
92 	AX25	Appropriate AX.25 support is enabled.
93 	CLK	Common clock infrastructure is enabled.
94 	CMA	Contiguous Memory Area support is enabled.
95 	DRM	Direct Rendering Management support is enabled.
97 	EDD	BIOS Enhanced Disk Drive Services (EDD) is enabled
98 	EFI	EFI Partitioning (GPT) is enabled
99 	EIDE	EIDE/ATAPI support is enabled.
101 	FB	The frame buffer device is enabled.
103 	GCOV	GCOV profiling is enabled.
104 	HW	Appropriate hardware is enabled.
105 	IA-64	IA-64 architecture is enabled.
106 	IMA     Integrity measurement architecture is enabled.
107 	IOSCHED	More than one I/O scheduler is enabled.
108 	IP_PNP	IP DHCP, BOOTP, or RARP is enabled.
109 	IPV6	IPv6 support is enabled.
110 	ISAPNP	ISA PnP code is enabled.
111 	ISDN	Appropriate ISDN support is enabled.
112 	ISOL	CPU Isolation is enabled.
113 	JOY	Appropriate joystick support is enabled.
114 	KGDB	Kernel debugger support is enabled.
115 	KVM	Kernel Virtual Machine support is enabled.
116 	LIBATA  Libata driver is enabled
117 	LP	Printer support is enabled.
118 	LOOP	Loopback device support is enabled.
119 	M68k	M68k architecture is enabled.
122 	MDA	MDA console support is enabled.
123 	MIPS	MIPS architecture is enabled.
124 	MOUSE	Appropriate mouse support is enabled.
126 	MTD	MTD (Memory Technology Device) support is enabled.
127 	NET	Appropriate network support is enabled.
128 	NUMA	NUMA support is enabled.
129 	NFS	Appropriate NFS support is enabled.
130 	OF	Devicetree is enabled.
131 	OSS	OSS sound support is enabled.
132 	PV_OPS	A paravirtualized kernel is enabled.
133 	PARIDE	The ParIDE (parallel port IDE) subsystem is enabled.
134 	PARISC	The PA-RISC architecture is enabled.
135 	PCI	PCI bus support is enabled.
136 	PCIE	PCI Express support is enabled.
137 	PCMCIA	The PCMCIA subsystem is enabled.
138 	PNP	Plug & Play support is enabled.
139 	PPC	PowerPC architecture is enabled.
140 	PPT	Parallel port support is enabled.
141 	PS2	Appropriate PS/2 support is enabled.
142 	RAM	RAM disk support is enabled.
144 	S390	S390 architecture is enabled.
145 	SCSI	Appropriate SCSI support is enabled.
149 	SELINUX SELinux support is enabled.
150 	APPARMOR AppArmor support is enabled.
151 	SERIAL	Serial support is enabled.
152 	SH	SuperH architecture is enabled.
153 	SMP	The kernel is an SMP kernel.
154 	SPARC	Sparc architecture is enabled.
155 	SWSUSP	Software suspend (hibernation) is enabled.
158 	TS	Appropriate touchscreen support is enabled.
159 	UMS	USB Mass Storage support is enabled.
160 	USB	USB support is enabled.
161 	USBHID	USB Human Interface Device support is enabled.
162 	V4L	Video For Linux support is enabled.
163 	VMMIO   Driver for memory mapped virtio devices is enabled.
165 	VT	Virtual terminal support is enabled.
166 	WDT	Watchdog support is enabled.
167 	XT	IBM PC/XT MFM hard disk support is enabled.
168 	X86-32	X86-32, aka i386 architecture is enabled.
169 	X86-64	X86-64 architecture is enabled.
173 	X86_UV	SGI UV support is enabled.
174 	XEN	Xen support is enabled
179 	KNL	Is a kernel start-up parameter.
180 	BOOT	Is a boot loader parameter.
194 running once the system is up.
196 The number of kernel parameters is not limited, but the length of the
197 complete command line (parameters including spaces etc.) is limited to
199 and is between 256 and 4096 characters. It is defined in the file
202 Finally, the [KMG] suffix is commonly described after a number of kernel