diff options
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 89 |
1 files changed, 67 insertions, 22 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index dfe8d1c226c..c45a3548537 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -58,6 +58,7 @@ parameter is applicable: ISAPNP ISA PnP 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. @@ -99,6 +100,7 @@ parameter is applicable: SWSUSP Software suspend (hibernation) is enabled. SUSPEND System suspend states are enabled. FTRACE Function tracing enabled. + TPM TPM drivers are enabled. TS Appropriate touchscreen support is enabled. UMS USB Mass Storage support is enabled. USB USB support is enabled. @@ -143,14 +145,14 @@ and is between 256 and 4096 characters. It is defined in the file acpi= [HW,ACPI,X86] Advanced Configuration and Power Interface - Format: { force | off | ht | strict | noirq | rsdt } + Format: { force | off | strict | noirq | rsdt } force -- enable ACPI if default was off off -- disable ACPI if default was on noirq -- do not use ACPI for IRQ routing - ht -- run only enough ACPI to enable Hyper Threading strict -- Be less tolerant of platforms that are not strictly ACPI specification compliant. rsdt -- prefer RSDT over (default) XSDT + copy_dsdt -- copy DSDT to memory See also Documentation/power/pm.txt, pci=noacpi @@ -252,8 +254,8 @@ and is between 256 and 4096 characters. It is defined in the file control method, with respect to putting devices into low power states, to be enforced (the ACPI 2.0 ordering of _PTS is used by default). - s4_nonvs prevents the kernel from saving/restoring the - ACPI NVS memory during hibernation. + nonvs prevents the kernel from saving/restoring the + ACPI NVS memory during suspend/hibernation and resume. sci_force_enable causes the kernel to set SCI_EN directly on resume from S1/S3 (which is against the ACPI spec, but some broken systems don't work without it). @@ -287,9 +289,6 @@ and is between 256 and 4096 characters. It is defined in the file advansys= [HW,SCSI] See header of drivers/scsi/advansys.c. - advwdt= [HW,WDT] Advantech WDT - Format: <iostart>,<iostop> - aedsp16= [HW,OSS] Audio Excel DSP 16 Format: <io>,<irq>,<dma>,<mss_io>,<mpu_io>,<mpu_irq> See also header of sound/oss/aedsp16.c. @@ -324,6 +323,8 @@ and is between 256 and 4096 characters. It is defined in the file they are unmapped. Otherwise they are flushed before they will be reused, which is a lot of faster + off - do not initialize any AMD IOMMU found in + the system amijoy.map= [HW,JOY] Amiga joystick support Map of devices attached to JOY0DAT and JOY1DAT @@ -708,6 +709,12 @@ and is between 256 and 4096 characters. It is defined in the file The VGA output is eventually overwritten by the real console. + ekgdboc= [X86,KGDB] Allow early kernel console debugging + ekgdboc=kbd + + This is desgined to be used in conjunction with + the boot argument: earlyprintk=vga + eata= [HW,SCSI] edd= [EDD] @@ -750,13 +757,14 @@ and is between 256 and 4096 characters. It is defined in the file Default value is 0. Value can be changed at runtime via /selinux/enforce. + erst_disable [ACPI] + Disable Error Record Serialization Table (ERST) + support. + ether= [HW,NET] Ethernet cards parameters This option is obsoleted by the "netdev=" option, which has equivalent usage. See its documentation for details. - eurwdt= [HW,WDT] Eurotech CPU-1220/1410 onboard watchdog. - Format: <io>[,<irq>] - failslab= fail_page_alloc= fail_make_request=[KNL] @@ -784,8 +792,12 @@ and is between 256 and 4096 characters. It is defined in the file as early as possible in order to facilitate early boot debugging. - ftrace_dump_on_oops + ftrace_dump_on_oops[=orig_cpu] [FTRACE] will dump the trace buffers on oops. + If no parameter is passed, ftrace will dump + buffers of all CPUs, but if you pass orig_cpu, it will + dump only the buffer of the CPU that triggered the + oops. ftrace_filter=[function-list] [FTRACE] Limit the functions traced by the function @@ -843,6 +855,11 @@ and is between 256 and 4096 characters. It is defined in the file hd= [EIDE] (E)IDE hard drive subsystem geometry Format: <cyl>,<head>,<sect> + hest_disable [ACPI] + Disable Hardware Error Source Table (HEST) support; + corresponding firmware-first mode error processing + logic will be disabled. + highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact size of <nn>. This works even on boxes that have no highmem otherwise. This also works to reduce highmem @@ -1112,10 +1129,26 @@ and is between 256 and 4096 characters. It is defined in the file use the HighMem zone if it exists, and the Normal zone if it does not. - kgdboc= [HW] kgdb over consoles. - Requires a tty driver that supports console polling. - (only serial supported for now) - Format: <serial_device>[,baud] + kgdbdbgp= [KGDB,HW] kgdb over EHCI usb debug port. + Format: <Controller#>[,poll interval] + The controller # is the number of the ehci usb debug + port as it is probed via PCI. The poll interval is + optional and is the number seconds in between + each poll cycle to the debug port in case you need + the functionality for interrupting the kernel with + gdb or control-c on the dbgp connection. When + not using this parameter you use sysrq-g to break into + the kernel debugger. + + kgdboc= [KGDB,HW] kgdb over consoles. + Requires a tty driver that supports console polling, + or a supported polling keyboard driver (non-usb). + Serial only format: <serial_device>[,baud] + keyboard only format: kbd + keyboard and serial format: kbd,<serial_device>[,baud] + + kgdbwait [KGDB] Stop kernel execution and enter the + kernel debugger at the earliest opportunity. kmac= [MIPS] korina ethernet MAC address. Configure the RouterBoard 532 series on-chip @@ -1227,10 +1260,12 @@ and is between 256 and 4096 characters. It is defined in the file * nohrst, nosrst, norst: suppress hard, soft and both resets. + * dump_id: dump IDENTIFY data. + If there are multiple matching configurations changing the same attribute, the last one is used. - lmb=debug [KNL] Enable lmb debug messages. + memblock=debug [KNL] Enable memblock debug messages. load_ramdisk= [RAM] List of ramdisks to load from floppy See Documentation/blockdev/ramdisk.txt. @@ -2015,7 +2050,9 @@ and is between 256 and 4096 characters. It is defined in the file WARNING: Forcing ASPM on may cause system lockups. pcie_pme= [PCIE,PM] Native PCIe PME signaling options: - off Do not use native PCIe PME signaling. + Format: {auto|force}[,nomsi] + auto Use native PCIe PME signaling if the BIOS allows the + kernel to control PCIe config registers of root ports. force Use native PCIe PME signaling even if the BIOS refuses to allow the kernel to control the relevant PCIe config registers. @@ -2238,9 +2275,6 @@ and is between 256 and 4096 characters. It is defined in the file sched_debug [KNL] Enables verbose scheduler debug messages. - sc1200wdt= [HW,WDT] SC1200 WDT (watchdog) driver - Format: <io>[,<timeout>[,<isapnp>]] - scsi_debug_*= [SCSI] See drivers/scsi/scsi_debug.c. @@ -2612,6 +2646,15 @@ and is between 256 and 4096 characters. It is defined in the file tp720= [HW,PS2] + tpm_suspend_pcr=[HW,TPM] + Format: integer pcr id + Specify that at suspend time, the tpm driver + should extend the specified pcr with zeros, + as a workaround for some chips which fail to + flush the last written pcr on TPM_SaveState. + This will guarantee that all the other pcrs + are saved. + trace_buf_size=nn[KMG] [FTRACE] will set tracing buffer size. @@ -2820,8 +2863,10 @@ and is between 256 and 4096 characters. It is defined in the file wd7000= [HW,SCSI] See header of drivers/scsi/wd7000.c. - wdt= [WDT] Watchdog - See Documentation/watchdog/wdt.txt. + watchdog timers [HW,WDT] For information on watchdog timers, + see Documentation/watchdog/watchdog-parameters.txt + or other driver-specific files in the + Documentation/watchdog/ directory. x2apic_phys [X86-64,APIC] Use x2apic physical mode instead of default x2apic cluster mode on platforms |