The kernels command line parameters The Linux Kernel documentation. The following is a consolidated list of the kernel parameters as. English Dictionary order defined as ignoring all. The kernel parses parameters from the kernel command line up to. Everything after is passed as an argument to init. Linux Pcie Driver Example' title='Linux Pcie Driver Example' />In my previous question, I established that the memory address used by PCIPCIe devices does not have to mapped to system RAM, but could also refer to on device. Broadcom Limited is a diversified global semiconductor leader built on 50 years of innovation, collaboration and engineering excellence. Module parameters can be specified in two ways via the kernel command. Parameters for modules which are built into the kernel need to be. Some kernel parameters take a list of CPUs as a value, e. The format of this list is lt cpu number. Note that for the special case of a range one can split the range into equal. For example one can add to the command line following parameter isolcpus1,2,1. Linux Pcie Driver Example' title='Linux Pcie Driver Example' />CPUs 1. This document may not be entirely up to date and comprehensive. The command. modinfo p modulename shows a current list of all parameters of a loadable. Loadable modules, after being loaded into the running kernel, also. Some of these. parameters may be changed at runtime by the command. The parameters listed below are only valid if certain kernel build options were. The text in square brackets at. ACPI ACPI support is enabled. AGP AGP Accelerated Graphics Port is enabled. ALSA ALSA sound support is enabled. APIC APIC support is enabled. APM Advanced Power Management support is enabled. ARM ARM architecture is enabled. AVR3. 2 AVR3. 2 architecture is enabled. AX2. 5 Appropriate AX. BLACKFIN Blackfin architecture is enabled. CLK Common clock infrastructure is enabled. CMA Contiguous Memory Area support is enabled. DRM Direct Rendering Management support is enabled. DYNAMICDEBUG Build in debug messages and enable them at runtime. EDD BIOS Enhanced Disk Drive Services EDD is enabled. EFI EFI Partitioning GPT is enabled. EIDE EIDEATAPI support is enabled. EVM Extended Verification Module. FB The frame buffer device is enabled. FTRACE Function tracing enabled. GCOV GCOV profiling is enabled. HW Appropriate hardware is enabled. IA 6. 4 IA 6. 4 architecture is enabled. IMA Integrity measurement architecture is enabled. IOSCHED More than one IO scheduler is enabled. IPPNP IP DHCP, BOOTP, or RARP is enabled. IPV6 IPv. 6 support is enabled. ISAPNP ISA Pn. P code is enabled. ISDN Appropriate ISDN support is enabled. JOY Appropriate joystick support is enabled. KGDB Kernel debugger support is enabled. KVM Kernel Virtual Machine support is enabled. LIBATA Libata driver is enabled. LP Printer support is enabled. LOOP Loopback device support is enabled. Linux Pcie Driver Example Resumes' title='Linux Pcie Driver Example Resumes' />M6. M6. 8k architecture is enabled. These options have more detailed description inside of. Documentationm. 68kkernel options. MDA MDA console support is enabled. MIPS MIPS architecture is enabled. MOUSE Appropriate mouse support is enabled. MSI Message Signaled Interrupts PCI. MTD MTD Memory Technology Device support is enabled. NET Appropriate network support is enabled. NUMA NUMA support is enabled. NFS Appropriate NFS support is enabled. OSS OSS sound support is enabled. PVOPS A paravirtualized kernel is enabled. PARIDE The Par. IDE parallel port IDE subsystem is enabled. PARISC The PA RISC architecture is enabled. PCI PCI bus support is enabled. PCIE PCI Express support is enabled. PCMCIA The PCMCIA subsystem is enabled. PNP Plug Play support is enabled. PPC Power. PC architecture is enabled. PPT Parallel port support is enabled. PS2 Appropriate PS2 support is enabled. RAM RAM disk support is enabled. S3. 90 S3. 90 architecture is enabled. SCSI Appropriate SCSI support is enabled. A lot of drivers have their options described inside. Documentationscsi sub directory. SECURITY Different security models are enabled. SELINUX SELinux support is enabled. Game Tropico 1 there. APPARMOR App. Armor support is enabled. SERIAL Serial support is enabled. SH Super. H architecture is enabled. SMP The kernel is an SMP kernel. SPARC Sparc architecture is enabled. SWSUSP Software suspend hibernation is enabled. SUSPEND System suspend states are enabled. TPM TPM drivers are enabled. TS Appropriate touchscreen support is enabled. UMS USB Mass Storage support is enabled. USB USB support is enabled. USBHID USB Human Interface Device support is enabled. V4. L Video For Linux support is enabled. VMMIO Driver for memory mapped virtio devices is enabled. VGA The VGA console has been enabled. VT Virtual terminal support is enabled. WDT Watchdog support is enabled. XT IBM PCXT MFM hard disk support is enabled. X8. 6 3. 2 X8. 6 3. X8. 6 6. 4 X8. 6 6. More X8. 6 6. 4 boot options can be found in. Documentationx. 86x. X8. 6 Either 3. X8. X8. 6 6. X8. 6UV SGI UV support is enabled. XEN Xen support is enabled. In addition, the following text indicates that the option BUGS Relates to possible processor bugs on the said processor. KNL Is a kernel start up parameter. BOOT Is a boot loader parameter. Parameters denoted with BOOT are actually interpreted by the boot. Do not modify the syntax of boot loader parameters without extreme. Documentationx. 86boot. There are also arch specific kernel parameters not documented here. See for example lt Documentationx. Note that ALL kernel parameters listed below are CASE SENSITIVE, and that. The number of kernel parameters is not limited, but the length of the. This limit depends on the architecture. It is defined in the file. COMMANDLINESIZE. Finally, the KMG suffix is commonly described after a number of kernel. These K, M, and G letters represent the binary. Kilo, Mega, and Giga, equalling 21. Such letter suffixes can also be entirely omitted. HW,ACPI,X8. 6,ARM6. Advanced Configuration and Power Interface. Format force on off strict noirq rsdt. ACPI if default was off. ACPI but allow fallback to DT arm. ACPI if default was on. ACPI for IRQ routing. Be less tolerant of platforms that are not. ACPI specification compliant. RSDT over default XSDT. DSDT to memory. For ARM6. ONLY acpioff, acpion or acpiforce. See also Documentationpowerruntimepm. ACPI, IOAPIC. Format lt int. APIC table, if available. APIC table. default 0. HW,ACPI. acpibacklightvendor. If set to vendor, prefer vendor specific driver. ACPI video. ko driver. FADT to use 3. 2 bit addresses rather than the. X addresses. Some firmware have broken 6. ACPI ignore these and use. HW, ACPI. Disable AML predefined validation mechanism. This mechanism can repair the evaluation result to make. ACPI specification compliant. This option is useful for developers to identify the. AML interpreter issue when the issue. HW,ACPI,ACPIDEBUG. HW,ACPI,ACPIDEBUG. Format lt int. CONFIGACPIDEBUG must be enabled to produce any ACPI. Bits in debuglayer correspond to a. COMPONENT in an ACPI source file, e. COMPONENT ACPIPCICOMPONENT. Bits in debuglevel correspond to a level in. ACPIDEBUGPRINT statements, e. ACPIDEBUGPRINTACPIDBINFO,. The debuglevel mask defaults to info. See. Documentationacpidebug. Enable processor driver info messages. Enable PCIPCI interrupt routing info messages. Enable AML Debug output, i. Debug. object while interpreting AML. Enable all messages related to ACPI hardware. Some values produce so much output that the system is. The logbuflen parameter may be useful. ACPI. strict lax no. Check for resource conflicts between native drivers. ACPI Operation. Regions System. IO and System. Memory. IO ports and memory declared in ACPI might be. ACPI subsystem in arbitrary AML code and.