X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=Documentation%2Fkernel-parameters.txt;h=a92c5ebf373e2bf4bea68072b58fbc0471ad9c13;hb=6a0bdffa0073857870a4ed1b4489762146359eb4;hp=ab84a01c8d68d6ec90465d958c7988786ae51be6;hpb=dabb8aa96020bde8359bc73e76c484dd7ff9b7f2;p=~andy%2Flinux diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index ab84a01c8d6..a92c5ebf373 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -70,7 +70,6 @@ parameter is applicable: M68k M68k architecture is enabled. These options have more detailed description inside of Documentation/m68k/kernel-options.txt. - MCA MCA bus support is enabled. MDA MDA console support is enabled. MIPS MIPS architecture is enabled. MOUSE Appropriate mouse support is enabled. @@ -110,6 +109,7 @@ parameter is applicable: USB USB support is enabled. USBHID USB Human Interface Device support is enabled. V4L 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. @@ -335,6 +335,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted. requirements as needed. This option does not override iommu=pt + amd_iommu_dump= [HW,X86-64] + Enable AMD IOMMU driver option to dump the ACPI table + for AMD IOMMU. With this option enabled, AMD IOMMU + driver will print ACPI tables for AMD IOMMU during + IOMMU initialization. + amijoy.map= [HW,JOY] Amiga joystick support Map of devices attached to JOY0DAT and JOY1DAT Format: , @@ -397,8 +403,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. atkbd.softrepeat= [HW] Use software keyboard repeat - autotest [IA-64] - baycom_epp= [HW,AX25] Format: , @@ -508,6 +512,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. Also note the kernel might malfunction if you disable some critical bits. + cma=nn[MG] [ARM,KNL] + Sets the size of kernel global memory area for contiguous + memory allocations. For more information, see + include/linux/dma-contiguous.h + cmo_free_hint= [PPC] Format: { yes | no } Specify whether pages are marked as being inactive when they are freed. This is used in CMO environments @@ -515,6 +524,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. a hypervisor. Default: yes + coherent_pool=nn[KMG] [ARM,KNL] + Sets the size of memory pool for coherent, atomic dma + allocations if Contiguous Memory Allocator (CMA) is used. + code_bytes [X86] How many bytes of object code to print in an oops report. Range: 0 - 8192 @@ -610,7 +623,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. ddebug_query= [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot time. See Documentation/dynamic-debug-howto.txt for - details. + details. Deprecated, see dyndbg. debug [KNL] Enable kernel debugging (events log level). @@ -730,6 +743,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. dscc4.setup= [NET] + dyndbg[="val"] [KNL,DYNAMIC_DEBUG] + module.dyndbg[="val"] + Enable debug messages at boot time. See + Documentation/dynamic-debug-howto.txt for details. + earlycon= [KNL] Output early console device and options. uart[8250],io,[,options] uart[8250],mmio,[,options] @@ -982,6 +1000,20 @@ bytes respectively. Such letter suffixes can also be entirely omitted. i8k.restricted [HW] Allow controlling fans only if SYS_ADMIN capability is set. + i915.invert_brightness= + [DRM] Invert the sense of the variable that is used to + set the brightness of the panel backlight. Normally a + brightness value of 0 indicates backlight switched off, + and the maximum of the brightness value sets the backlight + to maximum brightness. If this parameter is set to 0 + (default) and the machine requires it, or this parameter + is set to 1, a brightness value of 0 sets the backlight + to maximum brightness, and the maximum of the brightness + value switches the backlight off. + -1 -- never invert brightness + 0 -- machine default + 1 -- force brightness inversion + icn= [HW,ISDN] Format: [,[,[,]]] @@ -1425,8 +1457,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. devices can be requested on-demand with the /dev/loop-control interface. - mcatest= [IA-64] - mce [X86-32] Machine Check Exception mce=option [X86-64] See Documentation/x86/x86_64/boot-options.txt @@ -2161,6 +2191,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. on: Turn realloc on realloc same as realloc=on noari do not use PCIe ARI. + pcie_scan_all Scan all possible PCIe devices. Otherwise we + only look for one device below a PCIe downstream + port. pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power Management. @@ -2454,6 +2487,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. resume= [SWSUSP] Specify the partition device for software suspend + Format: + {/dev/ | PARTUUID= | : | } resume_offset= [SWSUSP] Specify the offset from the beginning of the partition @@ -2508,6 +2543,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted. sched_debug [KNL] Enables verbose scheduler debug messages. + skew_tick= [KNL] Offset the periodic timer tick per cpu to mitigate + xtime_lock contention on larger systems, and/or RCU lock + contention on all systems with CONFIG_MAXSMP set. + Format: { "0" | "1" } + 0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1" + 1 -- enable. + Note: increases power consumption, thus should only be + enabled if running jitter sensitive (HPC/RT) workloads. + security= [SECURITY] Choose a security module to enable at boot. If this boot parameter is not specified, only the first security module asking for security registration will be @@ -2929,6 +2973,22 @@ bytes respectively. Such letter suffixes can also be entirely omitted. video= [FB] Frame buffer configuration See Documentation/fb/modedb.txt. + virtio_mmio.device= + [VMMIO] Memory mapped virtio (platform) device. + + @:[:] + where: + := size (can use standard suffixes + like K, M and G) + := physical base address + := interrupt number (as passed to + request_irq()) + := (optional) platform device id + example: + virtio_mmio.device=1K@0x100b0000:48:7 + + Can be used multiple times for multiple devices. + vga= [BOOT,X86-32] Select a particular video mode See Documentation/x86/boot.txt and Documentation/svga.txt.