Lines Matching +full:touchscreen +full:- +full:x +full:- +full:mm
5 force -- enable ACPI if default was off
6 on -- enable ACPI but allow fallback to DT [arm64]
7 off -- disable ACPI if default was on
8 noirq -- do not use ACPI for IRQ routing
9 strict -- Be less tolerant of platforms that are not
11 rsdt -- prefer RSDT over (default) XSDT
12 copy_dsdt -- copy DSDT to memory
26 If set to vendor, prefer vendor-specific driver
58 Documentation/firmware-guide/acpi/debug.rst for more information about
121 Disable auto-serialization of AML methods
124 auto-serialization feature.
142 Ignore the ACPI-based watchdog interface (WDAT) and let
163 acpi_osi=! # disable all built-in OS vendor
165 acpi_osi=!! # enable all built-in OS vendor
227 For broken nForce2 BIOS resulting in XT-PIC timer.
235 as soon as the kernel's real-mode entry point is called.
265 See Documentation/sound/alsa-configuration.rst
272 align_va_addr= [X86-64]
277 CPU-intensive style benchmark, and it can vary highly in
280 32: only for 32-bit processes
281 64: only for 64-bit processes
282 on: enable for both 32- and 64-bit processes
283 off: disable for both 32- and 64-bit processes
292 amd_iommu= [HW,X86-64]
295 fullflush - enable flushing of IO/TLB entries when
299 off - do not initialize any AMD IOMMU found in
301 force_isolation - Force device isolation for all
307 amd_iommu_dump= [HW,X86-64]
313 amd_iommu_intr= [HW,X86-64]
316 legacy - Use legacy interrupt remapping mode.
317 vapic - Use virtual APIC mode, which allows IOMMU
319 This mode requires kvm-amd.avic=1.
333 Power management functions (SPARCstation-4/5 + deriv.)
335 Disable APC CPU standby support. SPARCstation-Fox does
336 not play well with APC CPU idle - disable it if you have
343 when initialising the APIC and IO-APIC components.
344 For X86-32, this can also be used to specify an APIC
364 to set it to "all" by meaning -- no limit here.
373 arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
397 audit= [KNL] Enable the audit sub-system
399 0 | off - kernel audit is disabled and can not be
401 unset - kernel audit is initialized but disabled and
403 1 | on - kernel audit is initialized and partially
416 0 - Disable the BAU.
417 1 - Enable the BAU.
418 unset - Disable the BAU.
439 See Documentation/block/cmdline-partition.rst
450 See Documentation/admin-guide/bootconfig.rst
461 bttv.pll= See Documentation/admin-guide/media/bttv.rst
470 cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
489 inclusive. See arch/mips/include/asm/pgtable-bits.h
499 - foo isn't auto-mounted if you mount all cgroups in
501 - foo isn't visible as an individually mountable
518 nosocket -- Disable socket memory accounting.
519 nokmem -- Disable kernel memory accounting.
524 0 -- check protection applied by kernel (includes
526 1 -- check protection requested by application.
540 force such clocks to be always-on nor does it reserve
544 information, see Documentation/driver-api/clk.rst.
546 clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
563 [X86-32] pit,hpet,tsc;
570 [X86-64] hpet,tsc
576 architected timer so that code using WFE-based polling
581 Disable CPUID feature X for the kernel. See
593 cma=nn[MG]@[start[MG][-end[MG]]]
604 Sets the size of kernel per-numa memory area for
606 per-numa CMA altogether. And If this option is not
608 With per-numa CMA enabled, DMA users on node nid will
624 com20020= [HW,NET] ARCnet - COM20020 chipset
628 com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
632 ARCnet - COM90xx chipset (memory-mapped buffers)
650 See Documentation/admin-guide/serial-console.rst for more
659 uart[8250],0x<addr>[,options]
660 Start an early, polled-mode console on the 8250/16550
663 MMIO inter-register address stride is either 8-bit
664 (mmio), 16-bit (mmio16), or 32-bit (mmio32).
668 the h/w is not re-initialized.
689 syscall, or to executing "dmesg -S --raw" or to reading
709 disable the cpuidle sub-system
715 disable the cpufreq sub-system
723 [X86] Delay for N microsec between assert and de-assert
738 [KNL, X86-64] Select a region under 4G first, and
741 See Documentation/admin-guide/kdump/kdump.rst for further details.
746 start-[end] where start and end are both
748 Documentation/admin-guide/kdump/kdump.rst for an example.
751 [KNL, X86-64] range could be above 4G. Allow kernel
756 It will be ignored if crashkernel=X is specified.
758 [KNL, X86-64] range under 4G. When crashkernel=X,high
763 low memory is needed to make sure DMA buffers for 32-bit
769 It will be ignored when crashkernel=X,high is not used
773 [KNL] Disable crypto self-tests
787 See also Documentation/input/devices/joystick-parport.rst
791 Documentation/admin-guide/dynamic-debug-howto.rst for
805 [KNL] verbose self-tests
808 self-tests.
810 1 will print _a lot_ more information - normally
848 Format: { on, no-mount, off }
850 no-mount:
855 get a -EPERM as result when trying to register files
859 Default value is set in build-time with a kernel configuration.
875 Documentation/admin-guide/mm/hugetlbpage.rst.
922 against bounds-checking flaws in the kernel's
962 to discrete, to make X server driver able to add WB
982 entries for DMA-API debugging code. One entry is
983 required per DMA-API allocation. Use this if the
984 DMA-API debugging code disables itself because the
988 With this option the DMA-API debugging driver
1003 Generic built-in EDID data sets are used, if one of
1008 available in Documentation/admin-guide/edid.rst. An EDID
1020 Control how the dt_cpu_ftrs device-tree binding is
1030 what data is available or for reverse-engineering.
1035 Documentation/admin-guide/dynamic-debug-howto.rst
1052 determined by stdout-path property in device tree's
1057 Start an early, polled-mode console on a Cadence
1067 uart[8250],0x<addr>[,options]
1068 Start an early, polled-mode console on the 8250/16550
1070 MMIO inter-register address stride is either 8-bit
1071 (mmio) or 32-bit (mmio32 or mmio32be).
1079 Start an early, polled-mode console on a pl011 serial
1083 the driver will use only 32-bit accessors to read/write
1087 Start an early, polled-mode console on a meson serial
1093 Start an early, polled-mode console on an msm serial
1099 Start an early, polled-mode console on an msm serial
1105 Start an early, polled-mode console on a serial port
1111 Start an early, polled-mode console on a serial port
1117 Use RISC-V SBI (Supervisor Binary Interface) for early
1135 Start an early, polled-mode console on a lantiq serial
1149 Start an early, polled-mode, output-only console on the
1154 Start an early, polled-mode console on the
1160 Start an early, polled-mode console on a Qualcomm
1168 coherent non-x86 systems that use system memory for
1183 earlyprintk=serial[,0x...[,baudrate]]
1279 attribute is added to range 0x100000000-0x180000000 and
1280 0x10a0000000-0x1120000000.
1284 range 0x240000000-0x43fffffff.
1296 Documentation/admin-guide/acpi/ssdt-overlays.rst for details.
1302 elanfreq= [X86-32]
1310 See Documentation/admin-guide/kdump/kdump.rst for details.
1314 to discrete, to make X server driver able to add WB
1326 0 -- permissive (log only, no denials).
1327 1 -- enforcing (deny and log).
1351 See also Documentation/fault-injection/.
1355 See Documentation/admin-guide/sysctl/net.rst for
1359 See Documentation/admin-guide/blockdev/floppy.rst.
1362 [IA-64] Avoid check_sal_cache_flush which may hang on
1367 forcepae [X86-32]
1386 ftrace_filter=[function-list]
1388 tracer at boot up. function-list is a comma separated
1393 ftrace_notrace=[function-list]
1395 function-list. This list can be changed at run time
1399 ftrace_graph_filter=[function-list]
1402 function-list is a comma separated list of functions
1406 ftrace_graph_notrace=[function-list]
1408 function-list. This list is a comma separated list of
1428 off -- Don't create device links from firmware info.
1429 permissive -- Create device links from firmware info
1432 on -- Create device links from firmware info and use it
1434 rpm -- Like "on", but also use to order runtime PM.
1440 See also Documentation/input/devices/joystick-parport.rst
1444 gart_fix_e820= [X86-64] disable the fix e820 for K8 GART
1448 gcov_persist= [GCOV] When non-zero (default), profiling data for
1481 gpio-mockup.gpio_mockup_ranges
1486 [KNL] Should the hard-lockup detector generate
1492 for 64-bit NUMA, off otherwise.
1495 hcl= [IA-64] SGI's Hardware Graph compatibility layer
1502 corresponding firmware-first mode error processing
1516 hpet= [X86-32,HPET] option to control HPET usage
1533 boot-time allocation of gigantic hugepages is skipped.
1541 Documentation/admin-guide/mm/hugetlbpage.rst.
1548 hugepagesz=X hugepages=Y can be specified once for
1551 Documentation/admin-guide/mm/hugetlbpage.rst.
1560 by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
1566 hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
1589 (disabled by default, and as a pre-condition
1591 i8042.direct [HW] Put keyboard port into non-translated mode
1605 suspend-to-ram transitions, only during s2r
1638 -1 -- never invert brightness
1639 0 -- machine default
1640 1 -- force brightness inversion
1645 ide-core.nodma= [HW] (E)IDE subsystem
1651 ide-generic.probe-mask= [HW] (E)IDE subsystem
1663 ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem
1674 idle=nomwait: Disable mwait for CPU C-states
1691 legacy only accept legacy-NaN binaries, if supported
1693 2008 only accept 2008-NaN binaries, if supported
1702 'relaxed' straps the emulator for both legacy-NaN and
1703 2008-NaN, whereas 'strict' enables legacy-NaN only on
1712 Ignore loglevel setting - this will print /all/
1776 Formats: { "ima" | "ima-ng" | "ima-sig" }
1777 Default: "ima-ng"
1809 initcall_blacklist= [KNL] Do not execute a comma-separated list of
1810 initcall functions. Useful for debugging built-in
1822 init_on_alloc= [MM] Fill newly allocated pages and heap objects with
1827 init_on_free= [MM] Fill freed pages and heap objects with zeroes.
1843 0 -- basic integrity auditing messages. (Default)
1844 1 -- additional integrity auditing messages.
1857 forcedac [X86-64]
1859 for io virtual address below 32-bit forcing dual
1861 than 32-bit addressing. The default is to look
1862 for translation below 32-bit and if not available
1880 could harm performance of some high-throughput
1894 1 to 9 specify maximum depth of C-state.
1904 used along with the hardware-managed P-states (HWP)
1908 in favor of acpi-cpufreq. Forcing the intel_pstate driver
1909 instead of acpi-cpufreq may disable platform features, such
1911 P-States information being indicated to OSPM and therefore
1914 or on platforms that use pcc-cpufreq instead of acpi-cpufreq.
1927 Allow per-logical-CPU P-State performance control limits using
1930 intremap= [X86-64, Intel-IOMMU]
1935 BIOS x2APIC opt-out request will be ignored
1959 0 - Lazy mode.
1965 1 - Strict mode (default).
1972 0 - Use IOMMU translation for DMA.
1973 1 - Bypass the IOMMU for DMA.
1974 unset - Use value of CONFIG_IOMMU_DEFAULT_PASSTHROUGH.
1976 io7= [HW] IO7 for Marvel-based Alpha systems
1991 See Documentation/admin-guide/nfs/nfsroot.rst.
2015 Enables support for pseudo-NMIs in the kernel. This
2034 [Deprecated - use cpusets instead]
2035 Format: [flag-list,]<cpu-list>
2066 "number of CPUs in system - 1".
2092 The format of <cpu-list> is described above.
2096 ivrs_ioapic [HW,X86-64]
2097 Provide an override to the IOAPIC-ID<->DEVICE-ID
2099 example, to map IOAPIC-ID decimal 10 to
2103 ivrs_hpet [HW,X86-64]
2104 Provide an override to the HPET-ID<->DEVICE-ID
2106 example, to map HPET-ID decimal 0 to
2110 ivrs_acpihid [HW,X86-64]
2111 Provide an override to the ACPI-HID:UID<->DEVICE-ID
2113 example, to map UART-HID:UID AMD0020:0 to
2133 kernelcore= [KNL,X86,IA-64,PPC]
2136 the kernel for non-movable allocations. The requested
2146 subsystem. Note that allocations like PTEs-from-HighMem
2154 for non-movable allocations and remaining memory is used
2165 gdb or control-c on the dbgp connection. When
2166 not using this parameter you use sysrq-g to break into
2171 or a supported polling keyboard driver (non-usb).
2198 Configure the RouterBoard 532 series on-chip
2201 kmemleak= [KNL] Boot-time kmemleak enable/disable
2207 kprobe_event=[probe-list]
2209 The probe-list is a semicolon delimited list of probe
2255 kvm-amd.nested= [KVM,AMD] Allow nested virtualization in KVM/SVM.
2258 kvm-amd.npt= [KVM,AMD] Disable nested paging (virtualized MMU)
2260 Default is 1 (enabled) if in 64-bit or 32-bit PAE mode.
2262 kvm-arm.vgic_v3_group0_trap=
2263 [KVM,ARM] Trap guest accesses to GICv3 group-0
2266 kvm-arm.vgic_v3_group1_trap=
2267 [KVM,ARM] Trap guest accesses to GICv3 group-1
2270 kvm-arm.vgic_v3_common_trap=
2274 kvm-arm.vgic_v4_enable=
2286 kvm-intel.ept= [KVM,Intel] Disable extended page tables
2290 kvm-intel.emulate_invalid_guest_state=
2294 kvm-intel.flexpriority=
2298 kvm-intel.nested=
2302 kvm-intel.unrestricted_guest=
2307 kvm-intel.vmentry_l1d_flush=[KVM,Intel] Mitigation for L1 Terminal Fault
2308 CVE-2018-3620.
2319 kvm-intel.vpid= [KVM,Intel] Disable Virtual Processor Identification
2386 For details see: Documentation/admin-guide/hw-vuln/l1tf.rst
2392 lapic [X86-32,APIC] Enable the local APIC even if BIOS
2396 value for LAPIC timer one-shot implementation. Default
2431 first fan-out link behind PMP device. It does not
2445 * Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
2457 hot-unplug link recovery
2494 Set the number of locking read-acquisition kthreads.
2499 Set the number of locking write-acquisition kthreads.
2502 Set time (s) after boot for CPU-hotplug testing.
2505 Set time (s) between CPU-hotplug operations, or
2506 zero to disable CPU-hotplug testing.
2509 Set task-shuffle interval (jiffies). Shuffling
2510 tasks allows some CPUs to go into dyntick-idle
2515 is useful for hands-off automated testing.
2548 7 (KERN_DEBUG) debug-level messages
2558 logo.nologo [FB] Disables display of the built-in Linux logo.
2576 an IEEE 1284-compliant printer is attached; if
2582 time-consuming boot-time autodetection (up to 250 ms per
2603 machvec= [IA-64] Force the use of a particular machine-vector
2609 Example: machtype=lemote-yeeloong-2f-7inch
2624 (loop.max_loop) unconditionally pre-created at init time. The default
2627 devices can be requested on-demand with the
2628 /dev/loop-control interface.
2630 mce [X86-32] Machine Check Exception
2632 mce=option [X86-64] See Documentation/x86/x86_64/boot-options.rst
2635 See Documentation/admin-guide/md.rst.
2642 Control mitigation for the Micro-architectural Data
2657 full - Enable MDS mitigation on vulnerable CPUs
2658 full,nosmt - Enable MDS mitigation and disable
2660 off - Unconditionally disable MDS mitigation
2662 On TAA-affected machines, mds=off can be prevented by
2671 For details see: Documentation/admin-guide/hw-vuln/mds.rst
2690 mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
2695 per-device physically contiguous DMA buffers.
2703 See Documentation/admin-guide/mm/memory-hotplug.rst.
2728 Example: Exclude memory from 0x18690000-0x1869ffff
2742 memmap=<size>%<offset>-<oldtype>+<newtype>
2744 from <oldtype> to <newtype>. If "-<oldtype>" is left
2759 repeatable BIOS-originated corruption always
2784 mem_encrypt= [X86-64] AMD Secure Memory Encryption (SME) control
2792 Refer to Documentation/virt/kvm/amd-memory-encryption.rst
2796 s2idle - Suspend-To-Idle
2797 shallow - Power-On Suspend or equivalent (if supported)
2798 deep - Suspend-To-RAM or equivalent (if supported)
2799 See Documentation/admin-guide/pm/sleep-states.rst.
2802 See Documentation/admin-guide/media/meye.rst.
2804 mfgpt_irq= [IA-32] Specify the IRQ to use for the
2805 Multi-Function General Purpose Timers on AMD Geode
2808 mfgptfix [X86-32] Fix MFGPT timers on AMD Geode platforms when
2822 0 - The attached screen is the 3.5" TFT
2823 1 - The attached screen is the 7" TFT
2824 2 - The VGA Shield is attached (1024x768)
2828 b - Enable backlight. The TFT backlight pin will be
2832 c - Enable the s3c camera interface.
2833 t - Reserved for enabling touchscreen support. The
2834 touchscreen support is not enabled in the mainstream
2837 https://repo.or.cz/w/linux-2.6/mini2440.git
2842 arch-independent options, each of which is an
2843 aggregation of existing arch-specific options.
2856 ssbd=force-off [ARM64]
2874 have other ways of avoiding SMT-based attacks.
2899 module_blacklist= [KNL] Do not load a comma-separated list of
2913 movablecore= [KNL,X86,IA-64,PPC]
2924 movable_node [KNL] Boot-time switch to make hotplugable memory
2931 Format: <name>,<region-number>,<size>,<offset>
2934 <name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
2943 onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration
2947 boundary - index of last SLC block on Flex-OneNAND.
2949 lock - Configure if Flex-OneNAND boundary should be locked.
2956 See arch/arm/mach-s3c2412/mach-jive.c
2984 something different and driver-specific.
2995 See Documentation/admin-guide/nfs/nfsroot.rst.
2997 nfsroot= [NFS] nfs root filesystem for disk-less boxes.
2998 See Documentation/admin-guide/nfs/nfsroot.rst.
3001 See Documentation/admin-guide/nfs/nfsroot.rst.
3025 [NFS] enable 64-bit inode numbers.
3026 If zero, the NFS client will fake up a 32-bit inode
3028 of returning the full 64-bit number.
3029 The default is to return 64-bit inode numbers.
3059 [NFS4] Specify an additional fixed unique ident-
3090 driver. A non-zero value sets the minimum interval
3102 NMI stack-backtrace request.
3111 0 - turn hardlockup detector in nmi_watchdog off
3112 1 - turn hardlockup detector in nmi_watchdog on
3129 no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
3133 no5lvl [X86-64] Disable 5-level paging mode. Forces
3134 kernel to use 4-level paging instead.
3164 noaliencache [MM, NUMA, SLAB] Disables the allocation of alien
3165 caches in the slab allocator. Saves per-node memory,
3185 nodelayacct [KNL] Disable per-task delay accounting
3191 no_entry_flush [PPC] Don't flush the L1-D cache when entering the kernel.
3193 noexec [IA-64]
3196 On X86-32 available only on PAE configured kernels.
3197 noexec=on: enable non-executable mappings (default)
3198 noexec=off: disable non-executable mappings
3208 noexec32 [X86-64]
3209 This affects only 32-bit executables.
3210 noexec32=on: enable non-executable mappings (default)
3212 noexec32=off: disable non-executable mappings
3217 nofxsr [BUGS=X86-32] Disables x86 floating point extended
3219 legacy floating-point registers on task switch.
3243 [PPC] Don't flush the L1-D cache after accessing user data.
3247 enabling legacy floating-point and sse state.
3272 nohalt [IA-64] Tells the kernel not to use the power saving
3274 power-consumption. On the positive side, it reduces
3275 interrupt wake-up latency, which may improve performance
3277 real-time systems.
3297 noirqdebug [X86-32] Disables the code which attempts to detect and
3308 nointremap [X86-64, Intel-IOMMU] Do not enable interrupt
3310 [Deprecated - use intremap=off]
3312 nointroute [IA-64]
3316 nojitter [IA-64] Disables jitter checking for ITC timers.
3318 no-kvmclock [X86,KVM] Disable paravirtualized KVM clock driver
3320 no-kvmapf [X86,KVM] Disable paravirtualized asynchronous page
3323 no-vmw-sched-clock
3327 no-steal-acc [X86,PV_OPS,ARM64] Disable paravirtualized steal time
3331 nolapic [X86-32,APIC] Do not enable or use the local APIC.
3333 nolapic_timer [X86-32,APIC] Do not use the local APIC timer.
3338 nomca [IA-64] Disable machine check abort handling
3340 nomce [X86-32] Disable Machine Check Exception
3342 nomfgpt [X86-32] Disable Multi-Function General Purpose
3354 nopcid [X86-64] Disable the PCID cpu feature.
3359 noreplace-smp [X86-32,SMP] Don't replace SMP instructions
3370 no-scroll [VGA] Disables scrollback.
3371 This is required for the Braillex ib80-piezo Braille
3374 nosbagart [IA-64]
3376 nosep [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
3381 nosoftlockup [KNL] Disable the soft-lockup detector.
3386 soft-lockup and NMI watchdog (hard-lockup).
3390 nox2apic [X86-64,APIC] Do not enable x2APIC mode.
3415 nptcg= [IA-64] Override max number of concurrent global TLB
3424 n. So during boot up some boot time memory for per-cpu
3425 variables need be pre-allocated for later physical cpu
3436 See Documentation/admin-guide/sysctl/vm.rst for details.
3439 See Documentation/core-api/debugging-via-ohci1394.rst for more
3478 running on a platform with a direct-mapped memory-side
3484 page_owner= [KNL] Boot-time page_owner enabling option.
3490 page_poison= [KNL] Boot-time parameter changing the state of
3520 See Documentation/admin-guide/tainted-kernels.rst for
3528 Run kdump after running panic-notifiers and dumping
3573 See also Documentation/admin-guide/blockdev/paride.rst.
3602 bios [X86-32] force use of PCI BIOS, don't access
3604 has a non-standard PCI host bridge.
3605 nobios [X86-32] disallow use of PCI BIOS, only direct
3611 data in IO port 0xCFC, both 32-bit).
3613 Mechanism 2 (IO port 0xCF8 is an 8-bit port for
3614 the function, IO port 0xCFA, also 8-bit, sets
3616 through ports 0xC000-0xCFFF).
3623 root domains (aka PCI segments, in ACPI-speak).
3631 disable the use of MSI interrupts system-wide.
3636 primary IO-APIC for bridges that cannot disable
3643 biosirq [X86-32] Use PCI BIOS calls to get the interrupt
3667 F0000h-100000h range.
3672 assign-busses [X86] Always assign all PCI bus
3700 bfsort Sort PCI devices into breadth-first order.
3703 nobfsort Don't sort PCI devices into breadth-first order.
3705 tuning and use the BIOS-configured MPS defaults.
3715 configuration allows peer-to-peer DMA between
3718 that hot-added devices will work.
3733 A PCI-PCI bridge can be specified if resource
3739 for 4096-byte alignment.
3741 end-to-end CRC checking).
3770 noats [PCIE, Intel-IOMMU, AMD-IOMMU]
3806 dpc-native Use native PCIe service for DPC only. May
3823 Keep all power-domains already enabled by bootloader on,
3829 See Documentation/admin-guide/blockdev/paride.rst.
3839 See comments in mm/percpu.c for details on each
3844 See Documentation/admin-guide/blockdev/paride.rst.
3847 See Documentation/admin-guide/blockdev/paride.rst.
3849 pirq= [SMP,APIC] Manual mp-table setup
3850 See Documentation/x86/i386/IO-APIC.rst.
3854 See also Documentation/admin-guide/parport.rst.
3865 CONFIG_PNP_DEBUG_MESSAGES option). Change at run-time
3874 { on | off | curr | res | no-curr | no-res }
3912 print-fatal-signals=
3918 coredump - etc.
3921 you might want to try "ulimit -i unlimited".
3933 on - unlimited logging to /dev/kmsg from userspace
3934 off - logging to /dev/kmsg disabled
3935 ratelimit - ratelimit the logging
3942 Limit processor to maximum C-state
3946 Ignore the _CST method to determine C-states,
3953 Param: "schedule" - profile schedule points.
3954 Param: "sleep" - profile D-state sleeping (millisecs).
3956 Param: "kvm" - profile VM exits.
3957 Param: <number> - step/bucket size as a power of 2 for
3987 See Documentation/admin-guide/blockdev/paride.rst.
3989 pti= [X86-64] Control Page Table Isolation of user and
3994 on - unconditionally enable
3995 off - unconditionally disable
3996 auto - kernel detects whether your CPU model is
4001 nopti [X86-64]
4005 [KNL] Number of legacy pty's. Overwrites compiled-in
4013 See Documentation/admin-guide/md.rst.
4016 See Documentation/admin-guide/blockdev/ramdisk.rst.
4026 ras=option[,option,...] [KNL] RAS-specific options
4038 the specified list of CPUs to be no-callback CPUs.
4041 purpose, where "x" is "p" for RCU-preempt, and
4042 "s" for RCU-sched, and "N" is the CPU number.
4044 which can be useful for HPC and real-time
4053 This improves the real-time response for the
4070 RCU grace-period cleanup.
4074 RCU grace-period initialization.
4078 RCU grace-period pre-initialization, that is,
4079 the propagation of recent CPU-hotplug changes up
4084 per-CPU rcuc kthreads. Defaults to a non-zero
4092 cache-to-cache transfer latencies.
4098 and for NUMA systems with large remote-access
4111 Set delay from grace-period initialization to
4124 soliciting quiescent-state help from
4136 Set the SCHED_FIFO priority of the RCU per-CPU
4139 and for the RCU grace-period kthreads (rcu_bh,
4141 set, valid values are 1-99 and the default is 1
4142 (the least-favored priority). Otherwise, when
4143 RCU_BOOST is not set, valid values are 0-99 and
4144 the default is zero (non-realtime operation).
4150 the wakeup overhead on the global grace-period
4152 each group's NOCB grace-period kthread.
4160 batch limiting is re-enabled.
4164 RCU's force-quiescent-state scan will aggressively
4182 Cause the grace-period kthread to get an extra
4184 it should at force-quiescent-state time.
4190 this specifies an rcu_read_unlock()-time delay
4194 of RCU-protected pointers after the relevant
4204 grace-period primitives such as call_rcu().
4215 grace-period primitives.
4218 Set test-start holdoff period. The purpose of
4237 Set number of RCU readers. The value -1 selects
4239 "n" less than -1 selects N-n+1, where N is again
4240 the number of CPUs. For example, -2 selects N
4241 (the number of CPUs), -3 selects N+1, and so on.
4242 A value of "n" less than or equal to -N selects
4255 complete. This is useful for hands-off automated
4262 Write-side holdoff between grace periods,
4279 Enable RCU grace-period forward-progress testing
4283 Specify the fraction of a CPU-stall-warning
4284 period to do tight-loop forward-progress testing.
4288 forward-progress tests.
4292 need_resched() during tight-loop forward-progress
4296 Use conditional/asynchronous update-side
4300 Use expedited update-side primitives, if available.
4303 Use normal (non-expedited) asynchronous
4304 update-side primitives, if available.
4307 Use normal (non-expedited) synchronous
4308 update-side primitives, if available. If all
4312 they are all non-zero.
4320 Leak an RCU-protected pointer out of the reader.
4335 Set number of RCU readers. The value -1 selects
4336 N-1, where N is the number of CPUs. A value
4337 "n" less than -1 selects N-n-2, where N is again
4338 the number of CPUs. For example, -2 selects N
4339 (the number of CPUs), -3 selects N+1, and so on.
4342 Enable debug-object double-call_rcu() testing.
4345 Set time (s) after boot for CPU-hotplug testing.
4348 Set time (jiffies) between CPU-hotplug operations,
4349 or zero to disable CPU-hotplug testing.
4352 Set the number of read-then-exit kthreads used
4354 task-exit processing.
4357 The number of times in a given read-then-exit
4358 episode that a set of read-then-exit kthreads
4363 read-then-exit testing episodes.
4366 Set task-shuffle interval (s). Shuffling tasks
4367 allows some CPUs to go into dyntick-idle mode
4372 is useful for hands-off automated testing.
4381 to any other stall-related activity.
4391 grace-period kthread to test RCU CPU stall
4417 Test RCU's dyntick-idle handling. See also the
4443 Use expedited grace-period primitives, for
4447 real-time latency, and degrade energy efficiency.
4451 Use only normal grace-period primitives,
4454 real-time latency, CPU utilization, and
4456 increased grace-period latency. This parameter
4463 only normal grace-period primitives. No effect
4470 number avoids disturbing real-time workloads,
4487 force - Override the decision by the kernel to hide the
4515 Set test-start holdoff period. The purpose of
4524 but the default has already reduced the per-pass
4529 Set number of readers. The default value of -1
4538 Set the read-side critical-section duration,
4542 Specify the read-protection implementation to test.
4555 See Documentation/admin-guide/cgroup-v1/cpusets.rst.
4563 reservetop= [X86-32]
4585 See Documentation/power/swsusp-and-swap-files.rst
4601 during restoration read-only).
4624 ro [KNL] Mount root device read-only on boot
4627 on Mark read-only kernel memory as read-only (default).
4628 off Leave read-only kernel memory writable for debugging.
4633 debug-uart get routed to the D+ and D- pins of the usb
4655 rw [KNL] Mount root device read-write on boot
4697 to 10 seconds for built-in smp_call_function()
4704 that requesting even small non-zero numbers of
4711 The default of -1 specifies a number of kthreads
4716 test before initiating CPU-hotplug operations.
4720 CPU-hotplug operations. Specifying zero (which
4721 is the default) disables CPU-hotplug operations.
4727 Non-zero values are useful for automated tests.
4750 "wait" parameter. A value of -1 selects the
4751 default if all other weights are -1. However,
4753 value of -1 will instead select a weight of zero.
4758 non-zero "wait" parameter. See weight_single.
4771 non-zero "wait" parameter. See weight_single
4783 non-zero "wait" parameter. See weight_single
4790 0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
4791 1 -- enable.
4802 0 -- disable.
4803 1 -- enable.
4809 0 -- disable.
4810 1 -- enable.
4813 serialnumber [BUGS=X86-32]
4818 simeth= [IA-64]
4823 slab_nomerge [MM]
4836 slab_max_order= [MM, SLAB]
4842 slub_debug[=options[,slabs][;[options[,slabs]]...] [MM, SLUB]
4850 slub_memcg_sysfs= [MM, SLUB]
4852 memory cgroup sub-caches. 1 to enable, 0 to disable.
4858 slub_max_order= [MM, SLUB]
4864 slub_min_objects= [MM, SLUB]
4873 slub_min_order= [MM, SLUB]
4878 slub_nomerge [MM, SLUB]
4885 smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
4886 smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
4887 smsc-ircc2.ircc_sir= [HW] SIR base I/O port
4888 smsc-ircc2.ircc_fir= [HW] FIR base I/O port
4889 smsc-ircc2.ircc_irq= [HW] IRQ line
4890 smsc-ircc2.ircc_dma= [HW] DMA channel
4891 smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
4901 Default: -1 (no limit)
4904 [KNL] Should the soft-lockup detector generate panics.
4907 A value of 1 instructs the soft-lockup detector
4908 to panic the machine when a soft-lockup occurs. It is
4911 respective build-time switch to that functionality.
4914 [KNL] Should the soft-lockup detector generate
4919 See Documentation/admin-guide/laptops/sonypi.rst
4926 on - unconditionally enable, implies
4928 off - unconditionally disable, implies
4930 auto - kernel detects whether your CPU model is
4947 retpoline - replace indirect branches
4948 retpoline,generic - google's original retpoline
4949 retpoline,amd - AMD-specific minimal thunk
4959 on - Unconditionally enable mitigations. Is
4962 off - Unconditionally disable mitigations. Is
4965 prctl - Indirect branch speculation is enabled,
4971 - Like "prctl" above, but only STIBP is
4977 - Same as "prctl" above, but all seccomp
4982 - Like "seccomp" above, but only STIBP is
4987 auto - Kernel selects the mitigation depending on
5019 on - Unconditionally disable Speculative Store Bypass
5020 off - Unconditionally enable Speculative Store Bypass
5021 auto - Kernel detects whether the CPU model contains an
5027 prctl - Control Speculative Store Bypass per thread
5031 seccomp - Same as "prctl" above, but all seccomp threads
5039 on,auto - On Power8 and Power9 insert a store-forwarding
5043 off - No action.
5060 off - not enabled
5062 warn - the kernel will emit rate limited warnings
5067 fatal - the kernel will send SIGBUS to applications
5079 Certain CPUs are vulnerable to an MDS-like
5097 grace-period sequence counter wrap for the
5098 srcu_data structure's ->srcu_gp_seq_needed field.
5120 force-on: Unconditionally enable mitigation for
5122 force-off: Unconditionally disable mitigation for
5129 stack_guard_gap= [MM]
5139 stacktrace_filter=[function-list]
5141 will trace at boot up. function-list is a comma separated
5149 Set the STI (builtin display/keyboard on the HP-PARISC
5151 as the initial boot-console.
5192 to global on non-NUMA machines)
5218 it if 0 is given (See Documentation/admin-guide/cgroup-v1/memory.rst)
5220 swiotlb= [ARM,IA-64,PPC,MIPS,X86]
5222 <int> -- Number of I/O TLB slabs
5223 force -- force using of bounce buffers even if they
5225 noforce -- Never use bounce buffers (for debugging)
5249 Ignore sysrq setting - this boot parameter will
5257 cache size. See Documentation/networking/ip-sysctl.rst
5263 Specify "mem" (for Suspend-to-RAM) or "standby" (for
5268 wakeup-capable RTC alarm.
5274 -1: disable all active trip points in all thermal zones
5278 -1: disable all critical trip points in all thermal zones
5289 -1: disable all passive trip points
5295 <deci-seconds>: poll all this frequency
5317 Prevent the CPU-hotplug component of torturing
5321 Dump the ftrace buffer at torture-test shutdown,
5325 with rotating-rust storage.
5341 trace_event=[event-list]
5343 to facilitate early boot debugging. The event-list is a
5347 trace_options=[option-list]
5349 The option-list is a comma delimited list of options
5399 See Documentation/admin-guide/mm/transhuge.rst
5407 high-resolution timer mode on older hardware, and in
5433 on - Enable TSX on the system. Although there are
5436 several previous speculation-related CVEs, and
5440 off - Disable TSX on the system. (Note that this
5448 auto - Disable TSX if X86_BUG_TAA is present,
5453 See Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
5459 Similar to Micro-architectural Data Sampling (MDS)
5474 full - Enable TAA mitigation on vulnerable CPUs
5477 full,nosmt - Enable TAA mitigation and disable SMT on
5480 vulnerable to cross-thread TAA attacks.
5481 off - Unconditionally disable TAA mitigation
5483 On MDS-affected machines, tsx_async_abort=off can be
5495 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
5501 See also Documentation/input/devices/joystick-parport.rst
5503 udbg-immortal [PPC] When debugging early kernel crashes that
5509 Set number of hash buckets for UDP/UDP-Lite connections
5511 uhci-hcd.ignore_oc=
5513 Some badly-designed motherboards generate lots of
5524 (default -1 = authorized except for wireless USB,
5530 for newly-detected USB devices (default 2). This
5558 [USB] Specifies timeout for the initial 64-byte
5565 [USB] A list of quirk entries to augment the built-in
5568 VendorID:ProductID:Flags. The IDs are 4-digit hex
5570 will change the built-in quirk; setting it if it is
5575 a 255-byte read);
5579 Set-Interface requests);
5598 (bInterval-1).
5633 usb-storage.delay_use=
5637 usb-storage.quirks=
5639 override the built-in unusual_devs list. List
5642 and Product ID values (4-digit hex numbers) and
5644 to a common usb-storage quirk flag as follows:
5685 medium is write-protected).
5694 1 - undefined instruction events
5695 2 - system calls
5696 4 - invalid data aborts
5697 8 - SIGSEGV faults
5698 16 - SIGBUS faults
5714 vdso32= [X86] Control the 32-bit vDSO
5715 vdso32=1: enable 32-bit VDSO
5716 vdso32=0 or vdso32=2: disable 32-bit VDSO
5726 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
5728 vector= [IA-64,SMP]
5759 vga= [BOOT,X86-32] Select a particular video mode
5761 Documentation/admin-guide/svga.rst.
5776 - Disable all of the above options
5797 vsyscall= [X86-64]
5800 code). Most statically-linked binaries and older
5818 Format: 0xYX, X = foreground, Y = background.
5824 see VGA-softcursor.txt. Default: 2 = underline.
5829 This is a 16-member array composed of values
5830 ranging from 0-255.
5835 This is a 16-member array composed of values
5836 ranging from 0-255.
5841 This is a 16-member array composed of values
5842 ranging from 0-255.
5847 Set system-wide default UTF-8 mode for all tty's.
5848 Default is 1, i.e. UTF-8 mode is enabled for all
5853 Format=<-1|0|1>
5854 Set system-wide default for whether a cursor
5855 is shown on new VTs. Default is -1,
5860 vt.italic= [VT] Default color for italic text; 0-15.
5863 vt.underline= [VT] Default color for underlined text; 0-15.
5867 see Documentation/watchdog/watchdog-parameters.rst
5868 or other driver-specific files in the
5894 that this also can be controlled per-workqueue for
5898 Per-cpu workqueues are generally preferred because
5900 locality; unfortunately, per-cpu workqueues tend to
5903 Enabling this makes the per-cpu workqueues which
5918 forces round-robin CPU selection to flush out
5923 x2apic_phys [X86-64,APIC] Use x2apic physical mode instead of
5927 x86_intel_mid_timer= [X86-32,APBT]
5933 xen_512gb_limit [KNL,X86-64,XEN]
5943 ide-disks -- unplug primary master IDE devices
5944 aux-ide-disks -- unplug non-primary-master IDE devices
5945 nics -- unplug network devices
5946 all -- unplug all emulated devices (NICs and IDE disks)
5947 unnecessary -- unplugging emulated devices is
5950 never -- do not unplug even if version check succeeds
5973 xen_timer_slop= [X86-64,XEN]
5991 preferred over the 2-level event handling, as it is
6018 xhci-hcd.quirks [USB,KNL]