Lines Matching +full:meson +full:- +full:display
16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nocmcff -- Disable firmware first mode for corrected
28 nospcr -- disable console in ACPI SPCR table as
45 If set to vendor, prefer vendor-specific driver
77 Documentation/firmware-guide/acpi/debug.rst for more information about
135 Format: <byte> or <bitmap-list>
138 Disable auto-serialization of AML methods
141 auto-serialization feature.
159 Ignore the ACPI-based watchdog interface (WDAT) and let
180 acpi_osi=! # disable all built-in OS vendor
182 acpi_osi=!! # enable all built-in OS vendor
244 For broken nForce2 BIOS resulting in XT-PIC timer.
253 as soon as the kernel's real-mode entry point is called.
291 See Documentation/sound/alsa-configuration.rst
298 align_va_addr= [X86-64]
303 CPU-intensive style benchmark, and it can vary highly in
306 32: only for 32-bit processes
307 64: only for 64-bit processes
308 on: enable for both 32- and 64-bit processes
309 off: disable for both 32- and 64-bit processes
319 Allow execve() of 32-bit applications and setting of the
321 subset of the CPUs support 32-bit EL0. When this
322 parameter is present, the set of CPUs supporting 32-bit
324 and hot-unplug operations may be restricted.
326 See Documentation/arch/arm64/asymmetric-32bit.rst for more
329 amd_iommu= [HW,X86-64]
332 fullflush - Deprecated, equivalent to iommu.strict=1
333 off - do not initialize any AMD IOMMU found in
335 force_isolation - Force device isolation for all
340 force_enable - Force enable the IOMMU on platforms known
343 pgtbl_v1 - Use v1 page table for DMA-API (Default).
344 pgtbl_v2 - Use v2 page table for DMA-API.
345 irtcachedis - Disable Interrupt Remapping Table (IRT) caching.
346 nohugepages - Limit page-sizes used for v1 page-tables
348 v2_pgsizes_only - Limit page-sizes used for v1 page-tables
352 amd_iommu_dump= [HW,X86-64]
358 amd_iommu_intr= [HW,X86-64]
361 legacy - Use legacy interrupt remapping mode.
362 vapic - Use virtual APIC mode, which allows IOMMU
364 This mode requires kvm-amd.avic=1.
393 Disable amd-pstate preferred core.
406 Power management functions (SPARCstation-4/5 + deriv.)
408 Disable APC CPU standby support. SPARCstation-Fox does
409 not play well with APC CPU idle - disable it if you have
412 apic [APIC,X86-64] Use IO-APIC. Default.
418 when initialising the APIC and IO-APIC components.
419 For X86-32, this can also be used to specify an APIC
446 0 -- disable.
447 1 -- enable.
450 arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
498 audit= [KNL] Enable the audit sub-system
500 0 | off - kernel audit is disabled and can not be
502 unset - kernel audit is initialized but disabled and
504 1 | on - kernel audit is initialized and partially
517 0 - Disable the BAU.
518 1 - Enable the BAU.
519 unset - Disable the BAU.
558 See Documentation/block/cmdline-partition.rst
572 See Documentation/admin-guide/bootconfig.rst
577 bttv.pll= See Documentation/admin-guide/media/bttv.rst
586 cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
605 inclusive. See arch/mips/include/asm/pgtable-bits.h
615 - foo isn't auto-mounted if you mount all cgroups in
617 - foo isn't visible as an individually mountable
619 - if foo is an optional feature then the feature is
625 Specifying "pressure" disables per-cgroup pressure
643 nosocket -- Disable socket memory accounting.
644 nokmem -- Disable kernel memory accounting.
645 nobpf -- Disable BPF memory accounting.
650 0 -- check protection applied by kernel (includes
652 1 -- check protection requested by application.
664 numbers X. Note the Linux-specific bits are not necessarily
665 stable over kernel options, but the vendor-specific
685 force such clocks to be always-on nor does it reserve
689 information, see Documentation/driver-api/clk.rst.
691 clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
708 [X86-32] pit,hpet,tsc;
715 [X86-64] hpet,tsc
721 architected timer so that code using WFE-based polling
735 clocksource-wdtest.holdoff= [KNL]
741 cma=nn[MG]@[start[MG][-end[MG]]]
752 Sets the size of kernel per-numa memory area for
754 per-numa CMA altogether. And If this option is not
756 With per-numa CMA enabled, DMA users on node nid will
783 com20020= [HW,NET] ARCnet - COM20020 chipset
787 com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
791 ARCnet - COM90xx chipset (memory-mapped buffers)
820 See Documentation/admin-guide/serial-console.rst for more
835 $ ls -d /sys/bus/serial-base/devices/*:*.*/tty/*
836 /sys/bus/serial-base/devices/00:04:0.0/tty/ttyS0
849 Start an early, polled-mode console on the 8250/16550
852 MMIO inter-register address stride is either 8-bit
853 (mmio), 16-bit (mmio16), or 32-bit (mmio32).
857 the h/w is not re-initialized.
884 syscall, or to executing "dmesg -S --raw" or to reading
908 disable the cpuidle sub-system
914 disable the cpufreq sub-system
922 [X86,EARLY] Delay for N microsec between assert and de-assert
943 like Hyper-V, PowerPC (fadump) and AMD SEV-SNP.
951 [KNL, X86-64, ARM64, RISCV, LoongArch] Select a region
954 See Documentation/admin-guide/kdump/kdump.rst for further details.
959 start-[end] where start and end are both
961 Documentation/admin-guide/kdump/kdump.rst for an example.
964 [KNL, X86-64, ARM64, RISCV, LoongArch] range could be
972 [KNL, X86-64, ARM64, RISCV, LoongArch] range under 4G.
978 for 32-bit devices won't run out. Kernel would try to allocate
981 --> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB)
982 --> arm64: 128MiB
983 --> riscv: 128MiB
984 --> loongarch: 128MiB
992 [KNL] Disable crypto self-tests
1000 csdlock_debug= [KNL] Enable or disable debug add-ons of cross-CPU
1015 See also Documentation/input/devices/joystick-parport.rst
1028 [KNL] verbose locking self-tests
1031 self-tests.
1033 (no extra messages), setting it to -1 (all bits set)
1034 will print _a_lot_ more information - normally only
1069 Format: { on, no-mount, off }
1071 no-mount:
1076 get a -EPERM as result when trying to register files
1080 Default value is set in build-time with a kernel configuration.
1092 Documentation/admin-guide/mm/hugetlbpage.rst.
1106 delayacct [KNL] Enable per-task delay accounting
1192 entries for DMA-API debugging code. One entry is
1193 required per DMA-API allocation. Use this if the
1194 DMA-API debugging code disables itself because the
1198 With this option the DMA-API debugging driver
1222 Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst
1247 Control how the dt_cpu_ftrs device-tree binding is
1257 what data is available or for reverse-engineering.
1262 Documentation/admin-guide/dynamic-debug-howto.rst
1273 determined by stdout-path property in device tree's
1278 Start an early, polled-mode console on a Cadence
1289 Start an early, polled-mode console on the 8250/16550
1291 MMIO inter-register address stride is either 8-bit
1292 (mmio) or 32-bit (mmio32 or mmio32be).
1302 Start an early, polled-mode console on a pl011 serial
1306 the driver will use only 32-bit accessors to read/write
1314 meson,<addr>
1315 Start an early, polled-mode console on a meson serial
1321 Start an early, polled-mode console on an msm serial
1327 Start an early, polled-mode console on an msm serial
1333 Start an early, polled-mode console on a serial port
1339 Start an early, polled-mode console on a serial port
1345 Use RISC-V SBI (Supervisor Binary Interface) for early
1363 Start an early, polled-mode console on a lantiq serial
1377 Start an early, polled-mode, output-only console on the
1382 Start an early, polled-mode console on the
1388 Start an early, polled-mode console on a Qualcomm
1396 coherent non-x86 systems that use system memory for
1495 Documentation/admin-guide/acpi/ssdt-overlays.rst for details.
1512 elanfreq= [X86-32]
1520 See Documentation/admin-guide/kdump/kdump.rst for details.
1536 0 -- permissive (log only, no denials).
1537 1 -- enforcing (deny and log).
1570 See also Documentation/fault-injection/.
1574 See Documentation/admin-guide/sysctl/net.rst for
1578 See Documentation/admin-guide/blockdev/floppy.rst.
1580 forcepae [X86-32]
1587 fred= [X86-64]
1638 ftrace_filter=[function-list]
1640 tracer at boot up. function-list is a comma-separated
1645 ftrace_notrace=[function-list]
1647 function-list. This list can be changed at run time
1651 ftrace_graph_filter=[function-list]
1654 function-list is a comma-separated list of functions
1658 ftrace_graph_notrace=[function-list]
1660 function-list. This list is a comma-separated list of
1680 off -- Don't create device links from firmware info.
1681 permissive -- Create device links from firmware info
1684 on -- Create device links from firmware info and use it
1686 rpm -- Like "on", but also use to order runtime PM.
1699 strict -- Default. Continue waiting on consumers to
1701 timeout -- Give up waiting on consumers and call
1711 See also Documentation/input/devices/joystick-parport.rst
1715 gart_fix_e820= [X86-64,EARLY] disable the fix e820 for K8 GART
1741 gcov_persist= [GCOV] When non-zero (default), profiling data for
1751 gpio-mockup.gpio_mockup_ranges
1754 gpio-mockup.gpio_mockup_named_lines
1786 against bounds-checking flaws in the kernel's
1792 [KNL] Should the hard-lockup detector generate
1798 for 64-bit NUMA, off otherwise.
1806 corresponding firmware-first mode error processing
1816 during restoration read-only).
1853 hpet= [X86-32,HPET] option to control HPET usage
1870 number of pages to allocate per-node can be specified.
1871 See also Documentation/admin-guide/mm/hugetlbpage.rst.
1882 Documentation/admin-guide/mm/hugetlbpage.rst.
1893 boot-time allocation of gigantic hugepages is skipped.
1921 by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
1927 hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
1943 Set device-properties for ACPI-enumerated I2C-attached
1944 touchscreen, to e.g. fix coordinates of upside-down
1952 Omit "=<val>" entirely Set a boolean device-property
1953 Unsigned number Set a u32 device-property
1954 Anything else Set a string device-property
1957 i2c_touchscreen_props=GDIX1001:touchscreen-inverted-x:
1958 touchscreen-inverted-y
1960 i2c_touchscreen_props=MSSL1680:touchscreen-size-x=1920:
1961 touchscreen-size-y=1080:touchscreen-inverted-y:
1962 firmware-name=gsl1680-vendor-model.fw:silead,home-button
1967 (disabled by default, and as a pre-condition
1969 i8042.direct [HW] Put keyboard port into non-translated mode
1983 suspend-to-ram transitions, only during s2r
2007 -1 -- never invert brightness
2008 0 -- machine default
2009 1 -- force brightness inversion
2011 ia32_emulation= [X86-64]
2013 When true, allows loading 32-bit programs and executing 32-bit
2038 idle=nomwait: Disable mwait for CPU C-states
2066 legacy only accept legacy-NaN binaries, if supported
2068 2008 only accept 2008-NaN binaries, if supported
2079 'relaxed' straps the emulator for both legacy-NaN and
2080 2008-NaN, whereas 'strict' enables legacy-NaN only on
2089 Ignore loglevel setting - this will print /all/
2156 Formats: { "ima" | "ima-ng" | "ima-ngv2" | "ima-sig" |
2157 "ima-sigv2" }
2158 Default: "ima-ng"
2190 initcall_blacklist= [KNL] Do not execute a comma-separated list of
2191 initcall functions. Useful for debugging built-in
2236 0 -- basic integrity auditing messages. (Default)
2237 1 -- additional integrity auditing messages.
2265 could harm performance of some high-throughput
2274 1 to 9 specify maximum depth of C-state.
2283 algorithms for p-state selection. There are two
2284 P-state selection algorithms provided by
2287 on whether or not the hardware managed P-states
2294 used along with the hardware-managed P-states (HWP)
2298 in favor of acpi-cpufreq. Forcing the intel_pstate driver
2299 instead of acpi-cpufreq may disable platform features, such
2301 P-States information being indicated to OSPM and therefore
2304 or on platforms that use pcc-cpufreq instead of acpi-cpufreq.
2317 Allow per-logical-CPU P-State performance control limits using
2320 intremap= [X86-64,Intel-IOMMU,EARLY]
2325 BIOS x2APIC opt-out request will be ignored
2368 AMD Gart HW IOMMU-specific options:
2387 Do scatter-gather (SG) merging. Implies "force"
2391 Don't do scatter-gather (SG) merging.
2404 0 - Try to allocate a 32-bit DMA address first, before
2406 1 - Allocate directly from the full usable range,
2408 greater than 32-bit addressing.
2412 0 - Lazy mode.
2418 1 - Strict mode.
2421 unset - Use value of CONFIG_IOMMU_DEFAULT_DMA_{LAZY,STRICT}.
2423 legacy driver-specific options takes precedence.
2428 0 - Use IOMMU translation for DMA.
2429 1 - Bypass the IOMMU for DMA.
2430 unset - Use value of CONFIG_IOMMU_DEFAULT_PASSTHROUGH.
2432 io7= [HW] IO7 for Marvel-based Alpha systems
2447 See Documentation/admin-guide/nfs/nfsroot.rst.
2483 Enables support for pseudo-NMIs in the kernel. This
2502 [Deprecated - use cpusets instead]
2503 Format: [flag-list,]<cpu-list>
2536 "number of CPUs in system - 1".
2562 The format of <cpu-list> is described above.
2566 ivrs_ioapic [HW,X86-64]
2567 Provide an override to the IOAPIC-ID<->DEVICE-ID
2571 For example, to map IOAPIC-ID decimal 10 to
2577 * To map IOAPIC-ID decimal 10 to PCI device 00:14.0
2580 * To map IOAPIC-ID decimal 10 to PCI segment 0x1 and
2584 ivrs_hpet [HW,X86-64]
2585 Provide an override to the HPET-ID<->DEVICE-ID
2589 For example, to map HPET-ID decimal 10 to
2595 * To map HPET-ID decimal 0 to PCI device 00:14.0
2598 * To map HPET-ID decimal 10 to PCI segment 0x1 and
2602 ivrs_acpihid [HW,X86-64]
2603 Provide an override to the ACPI-HID:UID<->DEVICE-ID
2607 For example, to map UART-HID:UID AMD0020:0 to
2613 * To map UART-HID:UID AMD0020:0 to PCI segment is 0,
2616 * To map UART-HID:UID AMD0020:0 to PCI segment 0x1 and
2640 the kernel for non-movable allocations. The requested
2650 subsystem. Note that allocations like PTEs-from-HighMem
2658 for non-movable allocations and remaining memory is used
2669 gdb or control-c on the dbgp connection. When
2670 not using this parameter you use sysrq-g to break into
2675 or a supported polling keyboard driver (non-usb).
2702 Configure the RouterBoard 532 series on-chip
2705 kmemleak= [KNL,EARLY] Boot-time kmemleak enable/disable
2711 kprobe_event=[probe-list]
2713 The probe-list is a semicolon delimited list of probe
2743 execution by eliminating the write-protection faults
2770 virtualization on-demand when creating and destroying
2778 is that doing so may interfere with using out-of-tree
2805 back to huge pages. If the value is a non-zero N, KVM will
2810 kvm-amd.nested= [KVM,AMD] Control nested virtualization feature in
2813 kvm-amd.npt= [KVM,AMD] Control KVM's use of Nested Page Tables,
2814 a.k.a. Two-Dimensional Page Tables. Default is 1
2818 kvm-arm.mode=
2824 nvhe: Standard nVHE-based mode, without support for
2831 nested: VHE-based mode with support for nested
2839 command-line.
2843 kvm-arm.vgic_v3_group0_trap=
2844 [KVM,ARM,EARLY] Trap guest accesses to GICv3 group-0
2847 kvm-arm.vgic_v3_group1_trap=
2848 [KVM,ARM,EARLY] Trap guest accesses to GICv3 group-1
2851 kvm-arm.vgic_v3_common_trap=
2855 kvm-arm.vgic_v4_enable=
2859 kvm-arm.wfe_trap_policy=
2868 kvm-arm.wfi_trap_policy=
2885 kvm-intel.ept= [KVM,Intel] Control KVM's use of Extended Page Tables,
2886 a.k.a. Two-Dimensional Page Tables. Default is 1
2890 kvm-intel.emulate_invalid_guest_state=
2892 state. Ignored if kvm-intel.enable_unrestricted_guest=1,
2898 kvm-intel.flexpriority=
2903 kvm-intel.nested=
2907 kvm-intel.unrestricted_guest=
2913 kvm-intel.vmentry_l1d_flush=[KVM,Intel] Mitigation for L1 Terminal Fault
2914 CVE-2018-3620.
2925 kvm-intel.vpid= [KVM,Intel] Control KVM's use of Virtual Processor
2945 on - enable the interface for the mitigation
3010 For details see: Documentation/admin-guide/hw-vuln/l1tf.rst
3016 lapic [X86-32,APIC,EARLY] Enable the local APIC even if BIOS
3020 value for LAPIC timer one-shot implementation. Default
3043 libata.force= [LIBATA] Force configurations. The format is a comma-
3055 first fan-out link behind PMP device. It does not
3069 * Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
3076 * rstonce: only attempt one reset during hot-unplug
3171 Specify the number of self-propagating call_rcu()
3179 occasional long-duration lock hold time. Defaults
3190 Set the number of locking read-acquisition kthreads.
3195 Set the number of locking write-acquisition kthreads.
3198 Set time (s) after boot for CPU-hotplug testing.
3201 Set time (s) between CPU-hotplug operations, or
3202 zero to disable CPU-hotplug testing.
3205 Do periodic testing of real-time lock priority
3210 non-real-time spinlocks, due to their disabling
3211 of preemption. Note that non-realtime mutexes
3224 Set task-shuffle interval (jiffies). Shuffling
3225 tasks allows some CPUs to go into dyntick-idle
3230 is useful for hands-off automated testing.
3249 Run the write-side locktorture kthreads at
3250 sched_set_fifo() real-time priority.
3268 7 (KERN_DEBUG) debug-level messages
3280 logo.nologo [FB] Disables display of the built-in Linux logo.
3298 an IEEE 1284-compliant printer is attached; if
3304 time-consuming boot-time autodetection (up to 250 ms per
3324 Example: machtype=lemote-yeeloong-2f-7inch
3336 (loop.max_loop) unconditionally pre-created at init time. The default
3339 devices can be requested on-demand with the
3340 /dev/loop-control interface.
3342 mce= [X86-{32,64}]
3379 do not opt-in to Local MCE delivery. Use legacy method
3400 don't overwrite the bios-set CMCI threshold. This boot
3409 force-enable recoverable machine check code paths
3415 See Documentation/admin-guide/md.rst.
3422 Control mitigation for the Micro-architectural Data
3437 full - Enable MDS mitigation on vulnerable CPUs
3438 full,nosmt - Enable MDS mitigation and disable
3440 off - Unconditionally disable MDS mitigation
3442 On TAA-affected machines, mds=off can be prevented by
3451 For details see: Documentation/admin-guide/hw-vuln/mds.rst
3466 [ARC,MICROBLAZE] - the limit applies only to low memory,
3469 [ARM64] - only limits memory covered by the linear
3482 [ARM,MIPS,EARLY] - override the memory layout
3489 mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
3496 per-device physically contiguous DMA buffers.
3504 See Documentation/admin-guide/mm/memory-hotplug.rst.
3529 Example: Exclude memory from 0x18690000-0x1869ffff
3543 memmap=<size>%<offset>-<oldtype>+<newtype>
3545 from <oldtype> to <newtype>. If "-<oldtype>" is left
3560 repeatable BIOS-originated corruption always
3604 mem_encrypt= [X86-64] AMD Secure Memory Encryption (SME) control
3610 Refer to Documentation/virt/kvm/x86/amd-memory-encryption.rst
3614 s2idle - Suspend-To-Idle
3615 shallow - Power-On Suspend or equivalent (if supported)
3616 deep - Suspend-To-RAM or equivalent (if supported)
3617 See Documentation/admin-guide/pm/sleep-states.rst.
3619 mfgptfix [X86-32] Fix MFGPT timers on AMD Geode platforms when
3635 0 - The attached screen is the 3.5" TFT
3636 1 - The attached screen is the 7" TFT
3637 2 - The VGA Shield is attached (1024x768)
3641 b - Enable backlight. The TFT backlight pin will be
3645 c - Enable the s3c camera interface.
3646 t - Reserved for enabling touchscreen support. The
3650 https://repo.or.cz/w/linux-2.6/mini2440.git
3655 arch-independent options, each of which is an
3656 aggregation of existing arch-specific options.
3685 ssbd=force-off [ARM64]
3698 have other ways of avoiding SMT-based attacks.
3733 full - Enable mitigation on vulnerable CPUs
3735 full,nosmt - Enable mitigation and disable SMT on
3738 off - Unconditionally disable mitigation
3751 Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst
3781 module_blacklist= [KNL] Do not load a comma-separated list of
3806 movable_node [KNL,EARLY] Boot-time switch to make hotplugable memory
3813 Format: <name>,<region-number>,<size>,<offset>
3816 <name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
3855 something different and driver-specific.
3895 [NFS] enable 64-bit inode numbers.
3896 If zero, the NFS client will fake up a 32-bit inode
3898 of returning the full 64-bit number.
3899 The default is to return 64-bit inode numbers.
3934 [NFS4] Specify an additional fixed unique ident-
3965 driver. A non-zero value sets the minimum interval
3970 server-to-server copies for which this server is
3982 server-to-server copy, knfsd temporarily mounts
3989 See Documentation/admin-guide/nfs/nfsroot.rst.
3991 nfsroot= [NFS] nfs root filesystem for disk-less boxes.
3992 See Documentation/admin-guide/nfs/nfsroot.rst.
3995 See Documentation/admin-guide/nfs/nfsroot.rst.
3999 NMI stack-backtrace request.
4008 0 - turn hardlockup detector in nmi_watchdog off
4009 1 - turn hardlockup detector in nmi_watchdog on
4010 rNNN - configure the watchdog with raw perf event 0xNNN
4023 no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
4027 no4lvl [RISCV,EARLY] Disable 4-level and 5-level paging modes.
4028 Forces kernel to use 3-level paging instead.
4030 no5lvl [X86-64,RISCV,EARLY] Disable 5-level paging mode. Forces
4031 kernel to use 4-level paging instead.
4066 no_entry_flush [PPC,EARLY] Don't flush the L1-D cache when entering the kernel.
4068 noexec32 [X86-64]
4069 This affects only 32-bit executables.
4070 noexec32=on: enable non-executable mappings (default)
4072 noexec32=off: disable non-executable mappings
4083 nofxsr [BUGS=X86-32] Disables x86 floating point extended
4085 legacy floating-point registers on task switch.
4098 compared. However, if this command-line option is
4141 nointremap [X86-64,Intel-IOMMU,EARLY] Do not enable interrupt
4143 [Deprecated - use intremap=off]
4149 noirqdebug [X86-32] Disables the code which attempts to detect and
4159 no-kvmapf [X86,KVM,EARLY] Disable paravirtualized asynchronous page
4162 no-kvmclock [X86,KVM,EARLY] Disable paravirtualized KVM clock driver
4164 nolapic [X86-32,APIC,EARLY] Do not enable or use the local APIC.
4166 nolapic_timer [X86-32,APIC,EARLY] Do not use the local APIC timer.
4168 nomce [X86-32] Disable Machine Check Exception
4170 nomfgpt [X86-32] Disable Multi-Function General Purpose
4174 sets up a display mode and provides framebuffer memory
4176 not load if they could possibly displace the pre-
4179 perform display-mode changes or accelerated rendering.
4192 nopcid [X86-64,EARLY] Disable the PCID cpu feature.
4197 nopti [X86-64,EARLY]
4213 noreplace-smp [X86-32,SMP] Don't replace SMP instructions
4219 no-scroll [VGA] Disables scrollback.
4220 This is required for the Braillex ib80-piezo Braille
4223 nosgx [X86-64,SGX,EARLY] Disables Intel SGX kernel support.
4243 nosoftlockup [KNL] Disable the soft-lockup detector.
4249 nospectre_bhb [ARM64,EARLY] Disable all mitigations for Spectre-BHB (branch
4262 no-steal-acc [X86,PV_OPS,ARM64,PPC/PSERIES,RISCV,LOONGARCH,EARLY]
4269 timer IRQ sources, i.e., the IO-APIC timer. This can
4274 [PPC,EARLY] Don't flush the L1-D cache after accessing user data.
4287 no-vmw-sched-clock
4292 soft-lockup and NMI watchdog (hard-lockup).
4296 nox2apic [X86-64,APIC,EARLY] Do not enable x2APIC mode.
4304 enabling legacy floating-point and sse state.
4326 n. So during boot up some boot time memory for per-cpu
4327 variables need be pre-allocated for later physical cpu
4354 soft-reserved memory partitioning.
4363 See Documentation/admin-guide/sysctl/vm.rst for details.
4366 See Documentation/core-api/debugging-via-ohci1394.rst for more
4381 onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration
4385 boundary - index of last SLC block on Flex-OneNAND.
4387 lock - Configure if Flex-OneNAND boundary should be locked.
4406 page_owner= [KNL,EARLY] Boot-time page_owner enabling option.
4412 page_poison= [KNL,EARLY] Boot-time parameter changing the state of
4440 See Documentation/admin-guide/tainted-kernels.rst for
4493 Set to non-zero to probe primary and secondary ISA
4499 Set to non-zero if a chip is present that snoops speed
4547 Set to non-zero to probe tertiary and further ISA
4563 Set to non-zero to probe QDI controllers. By default
4568 Set to non-zero to probe Winbond controllers. Use
4615 bios [X86-32] force use of PCI BIOS, don't access
4617 has a non-standard PCI host bridge.
4618 nobios [X86-32] disallow use of PCI BIOS, only direct
4624 data in IO port 0xCFC, both 32-bit).
4626 Mechanism 2 (IO port 0xCF8 is an 8-bit port for
4627 the function, IO port 0xCFA, also 8-bit, sets
4629 through ports 0xC000-0xCFFF).
4636 root domains (aka PCI segments, in ACPI-speak).
4644 disable the use of MSI interrupts system-wide.
4649 primary IO-APIC for bridges that cannot disable
4656 biosirq [X86-32] Use PCI BIOS calls to get the interrupt
4680 F0000h-100000h range.
4685 assign-busses [X86] Always assign all PCI bus
4706 <linux-pci@vger.kernel.org>.
4710 a bug to <linux-pci@vger.kernel.org>.
4722 bfsort Sort PCI devices into breadth-first order.
4725 nobfsort Don't sort PCI devices into breadth-first order.
4727 tuning and use the BIOS-configured MPS defaults.
4737 configuration allows peer-to-peer DMA between
4740 that hot-added devices will work.
4755 A PCI-PCI bridge can be specified if resource
4761 for 4096-byte alignment.
4763 end-to-end CRC checking). Only effective if
4794 noats [PCIE, Intel-IOMMU, AMD-IOMMU]
4825 bit-0 : ACS Source Validation
4826 bit-1 : ACS Translation Blocking
4827 bit-2 : ACS P2P Request Redirect
4828 bit-3 : ACS P2P Completion Redirect
4829 bit-4 : ACS Upstream Forwarding
4830 bit-5 : ACS P2P Egress Control
4831 bit-6 : ACS Direct Translated P2P
4841 Validation unchanged from whatever power-up
4853 system-wide.
4867 dpc-native Use native PCIe service for DPC only. May
4884 Keep all power-domains already enabled by bootloader on,
4902 pirq= [SMP,APIC] Manual mp-table setup
4903 See Documentation/arch/x86/i386/IO-APIC.rst.
4907 See also Documentation/admin-guide/parport.rst.
4926 CONFIG_PNP_DEBUG_MESSAGES option). Change at run-time
4935 { on | off | curr | res | no-curr | no-res }
4980 none - Limited to cond_resched() calls
4981 voluntary - Limited to cond_resched() and might_sleep() calls
4982 full - Any section that isn't explicitly preempt disabled
4986 lazy - Scheduler controlled. Similar to full but instead
4992 print-fatal-signals=
4998 coredump - etc.
5001 you might want to try "ulimit -i unlimited".
5013 or lockdep-detected issues (only if lock debug is on).
5022 on - unlimited logging to /dev/kmsg from userspace
5023 off - logging to /dev/kmsg disabled
5024 ratelimit - ratelimit the logging
5035 - 'always': traditional behavior always allows mem overrides.
5036 - 'ptrace': only allow mem overrides for active ptracers.
5037 - 'never': never allow mem overrides.
5041 Limit processor to maximum C-state
5045 Ignore the _CST method to determine C-states,
5052 Param: "schedule" - profile schedule points.
5053 Param: "kvm" - profile VM exits.
5054 Param: <number> - step/bucket size as a power of 2 for
5085 pti= [X86-64] Control Page Table Isolation of user and
5090 on - unconditionally enable
5091 off - unconditionally disable
5092 auto - kernel detects whether your CPU model is
5098 [KNL] Number of legacy pty's. Overwrites compiled-in
5110 See Documentation/admin-guide/md.rst.
5113 See Documentation/admin-guide/blockdev/ramdisk.rst.
5132 cross-syscall address exposures. This is only
5138 ras=option[,option,...] [KNL] RAS-specific options
5144 rcu_nocbs[=cpu-list]
5149 enable the no-callback CPU mode, which prevents
5154 "p" for RCU-preempt, "s" for RCU-sched, and "g"
5158 and real-time workloads. It can also improve
5162 list of CPUs is set to no-callback mode from boot.
5166 no-callback mode from boot but the mode may be
5177 This improves the real-time response for the
5188 Do only a one-line RCU CPU stall warning when
5189 there is an ongoing too-long CSD-lock wait.
5195 If triggered before the RCU grace-period machinery
5205 RCU grace-period cleanup.
5209 RCU grace-period initialization.
5213 RCU grace-period pre-initialization, that is,
5214 the propagation of recent CPU-hotplug changes up
5218 Set delay from grace-period initialization to
5231 soliciting quiescent-state help from
5243 Set the SCHED_FIFO priority of the RCU per-CPU
5246 and for the RCU grace-period kthreads (rcu_bh,
5248 set, valid values are 1-99 and the default is 1
5249 (the least-favored priority). Otherwise, when
5250 RCU_BOOST is not set, valid values are 0-99 and
5251 the default is zero (non-realtime operation).
5256 On callback-offloaded (rcu_nocbs) CPUs,
5259 use of the ->nocb_bypass list. However, in the
5260 common non-flooded case, RCU queues directly to
5261 the main ->cblist in order to avoid the extra
5262 overhead of the ->nocb_bypass list and its lock.
5264 a single jiffy, RCU pre-queues the callbacks into
5265 the ->nocb_bypass queue. The definition of "too
5269 On callback-offloaded (rcu_nocbs) CPUs, avoid
5282 batch limiting is re-enabled.
5286 RCU's force-quiescent-state scan will aggressively
5294 Set the page-cache refill delay (in milliseconds)
5295 in response to low-memory conditions. The range
5299 Set the shift-right count to use to compute
5300 the callback-invocation batch limit bl from
5307 Please note that this callback-invocation batch
5308 limit applies only to non-offloaded callback
5317 cache-to-cache transfer latencies.
5323 and for NUMA systems with large remote-access
5339 the wakeup overhead on the global grace-period
5341 each group's NOCB grace-period kthread.
5344 Cause the grace-period kthread to get an extra
5346 it should at force-quiescent-state time.
5359 this specifies an rcu_read_unlock()-time delay
5363 of RCU-protected pointers after the relevant
5373 per-CPU rcuc kthreads. Defaults to a non-zero
5402 grace-period primitives such as call_rcu().
5413 grace-period primitives.
5416 Set test-start holdoff period. The purpose of
5434 Test the double-argument variant of kfree_rcu().
5436 rcuscale.kfree_rcu_test_single, both the single-
5437 and double-argument variants are tested.
5440 Test the single-argument variant of kfree_rcu().
5442 rcuscale.kfree_rcu_test_double, both the single-
5443 and double-argument variants are tested.
5457 does not affect the data-collection interval,
5462 Set number of RCU readers. The value -1 selects
5464 "n" less than -1 selects N-n+1, where N is again
5465 the number of CPUs. For example, -2 selects N
5466 (the number of CPUs), -3 selects N+1, and so on.
5467 A value of "n" less than or equal to -N selects
5480 complete. This is useful for hands-off automated
5487 Write-side holdoff between grace periods,
5492 Additional write-side holdoff between grace
5510 for RCU grace-period forward-progress testing
5517 Specify the fraction of a CPU-stall-warning
5518 period to do tight-loop forward-progress testing.
5522 forward-progress tests.
5526 need_resched() during tight-loop forward-progress
5530 Use conditional/asynchronous update-side
5531 normal-grace-period primitives, if available.
5534 Use conditional/asynchronous update-side
5535 expedited-grace-period primitives, if available.
5538 Use conditional/asynchronous update-side
5539 normal-grace-period primitives that also take
5544 Use conditional/asynchronous update-side
5545 expedited-grace-period primitives that also take
5569 Use expedited update-side primitives, if available.
5572 Use normal (non-expedited) asynchronous
5573 update-side primitives, if available.
5576 Use polled update-side normal-grace-period
5580 Use polled update-side expedited-grace-period
5584 Use polled update-side normal-grace-period
5589 Use polled update-side expedited-grace-period
5613 Use normal (non-expedited) synchronous
5614 update-side primitives, if available. If all
5618 they are all non-zero.
5626 Leak an RCU-protected pointer out of the reader.
5641 Set number of RCU callback-offload togglers.
5646 callback-offload toggling attempts.
5649 Set number of RCU readers. The value -1 selects
5650 N-1, where N is the number of CPUs. A value
5651 "n" less than -1 selects N-n-2, where N is again
5652 the number of CPUs. For example, -2 selects N
5653 (the number of CPUs), -3 selects N+1, and so on.
5656 Enable debug-object double-call_rcu() testing.
5659 Set time (s) after boot for CPU-hotplug testing.
5662 Set time (jiffies) between CPU-hotplug operations,
5663 or zero to disable CPU-hotplug testing.
5667 by a high-priority FIFO real-time task. Set to
5676 second) between preemptions by a high-priority
5677 FIFO real-time task. This delay is mediated
5682 The number of times in a given read-then-exit
5683 episode that a set of read-then-exit kthreads
5688 read-then-exit testing episodes.
5693 are entered from low-order bit up, and are
5695 0x1 bit is normal readers, 0x2 NMI-safe readers,
5696 and 0x4 light-weight readers.
5699 Set task-shuffle interval (s). Shuffling tasks
5700 allows some CPUs to go into dyntick-idle mode
5705 is useful for hands-off automated testing.
5714 any other stall-related activity. Note that
5720 in scheduling-while-atomic splats.
5739 grace-period kthread to test RCU CPU stall
5765 Test RCU's dyntick-idle handling. See also the
5820 Use expedited grace-period primitives, for
5824 real-time latency, and degrade energy efficiency.
5828 Use only normal grace-period primitives,
5831 real-time latency, CPU utilization, and
5833 increased grace-period latency. This parameter
5840 only normal grace-period primitives. No effect
5846 post-boot attempt at an expedited RCU grace
5847 period to instead use normal non-expedited
5848 grace-period processing.
5856 set to the default value of -1.
5859 Set the minimum number of callback-queuing-time
5860 lock-contention events per jiffy required to
5861 cause the RCU Tasks flavors to switch to per-CPU
5864 the default value of -1.
5869 of -1 allows this to be automatically (and
5877 number avoids disturbing real-time workloads,
5882 cancel laziness on that CPU. Use -1 to disable
5892 only printed prior to the stall-warning message
5940 force - Override the decision by the kernel to hide the
5979 There are some built-in platform specific "quirks"
5980 - you may see: "reboot: <name> series board detected.
5984 built-in quirk table, and use the generic default
6017 Set test-start holdoff period. The purpose of
6032 but the default has already reduced the per-pass
6037 Set number of readers. The default value of -1
6046 Set the read-side critical-section duration,
6050 Specify the read-protection implementation to test.
6076 See Documentation/admin-guide/cgroup-v1/cpusets.rst.
6106 reservetop= [X86-32,EARLY]
6123 See Documentation/power/swsusp-and-swap-files.rst
6139 AMD-based UNRET and IBPB mitigations alone do not stop
6141 sibling threads. For that reason, STIBP is used on pro-
6145 off - no mitigation
6146 auto - automatically select a migitation
6147 auto,nosmt - automatically select a mitigation,
6151 ibpb - On AMD, mitigate short speculation
6156 ibpb,nosmt - Like "ibpb" above but will disable SMT
6160 unret - Force enable untrained return thunks,
6161 only effective on AMD f15h-f17h based
6163 unret,nosmt - Like unret, but will disable SMT when STIBP
6195 ro [KNL] Mount root device read-only on boot
6198 on Mark read-only kernel memory as read-only (default).
6199 off Leave read-only kernel memory writable for debugging.
6200 full Mark read-only kernel memory and aliases as read-only
6207 debug-uart get routed to the D+ and D- pins of the usb
6213 block/early-lookup.c for details.
6238 rw [KNL] Mount root device read-write on boot
6292 to 10 seconds for built-in smp_call_function()
6299 that requesting even small non-zero numbers of
6306 The default of -1 specifies a number of kthreads
6311 test before initiating CPU-hotplug operations.
6315 CPU-hotplug operations. Specifying zero (which
6316 is the default) disables CPU-hotplug operations.
6322 Non-zero values are useful for automated tests.
6345 "wait" parameter. A value of -1 selects the
6346 default if all other weights are -1. However,
6348 value of -1 will instead select a weight of zero.
6353 non-zero "wait" parameter. See weight_single.
6366 non-zero "wait" parameter. See weight_single
6378 non-zero "wait" parameter. See weight_single
6389 0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
6390 1 -- enable.
6401 0 -- disable.
6402 1 -- enable.
6405 serialnumber [BUGS=X86-32]
6407 sev=option[,option...] [X86-64]
6413 Do not enable SEV-SNP (applies to host/hypervisor
6416 SEV-SNP guests.
6424 to set it to "all" by meaning -- no limit here.
6505 using the csdlock_debug- kernel parameter.
6510 system. By default, let CSD-lock acquisition
6512 for this value provides a 5-minute timeout.
6514 smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
6515 smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
6516 smsc-ircc2.ircc_sir= [HW] SIR base I/O port
6517 smsc-ircc2.ircc_fir= [HW] FIR base I/O port
6518 smsc-ircc2.ircc_irq= [HW] IRQ line
6519 smsc-ircc2.ircc_dma= [HW] DMA channel
6520 smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
6530 Default: -1 (no limit)
6533 [KNL] Should the soft-lockup detector generate panics.
6536 A value of 1 instructs the soft-lockup detector
6537 to panic the machine when a soft-lockup occurs. It is
6540 respective build-time switch to that functionality.
6543 [KNL] Should the soft-lockup detector generate
6548 See Documentation/admin-guide/laptops/sonypi.rst
6555 on - (default) Enable the HW or SW mitigation as
6558 vmexit - On systems which don't have the HW mitigation
6561 protected from VM-originated BHI attacks, but
6563 off - Disable the mitigation.
6570 on - unconditionally enable, implies
6572 off - unconditionally disable, implies
6574 auto - kernel detects whether your CPU model is
6591 retpoline - replace indirect branches
6592 retpoline,generic - Retpolines
6593 retpoline,lfence - LFENCE; indirect branch
6594 retpoline,amd - alias for retpoline,lfence
6595 eibrs - Enhanced/Auto IBRS
6596 eibrs,retpoline - Enhanced/Auto IBRS + Retpolines
6597 eibrs,lfence - Enhanced/Auto IBRS + LFENCE
6598 ibrs - use IBRS to protect kernel
6608 on - Unconditionally enable mitigations. Is
6611 off - Unconditionally disable mitigations. Is
6614 prctl - Indirect branch speculation is enabled,
6620 - Like "prctl" above, but only STIBP is
6626 - Same as "prctl" above, but all seccomp
6631 - Like "seccomp" above, but only STIBP is
6636 auto - Kernel selects the mitigation depending on
6647 off - Disable mitigation
6648 microcode - Enable microcode mitigation only
6649 safe-ret - Enable sw-only safe RET mitigation (default)
6650 ibpb - Enable mitigation by issuing IBPB on
6652 ibpb-vmexit - Issue IBPB only on VMEXIT
6653 (cloud-specific mitigation)
6678 on - Unconditionally disable Speculative Store Bypass
6679 off - Unconditionally enable Speculative Store Bypass
6680 auto - Kernel detects whether the CPU model contains an
6686 prctl - Control Speculative Store Bypass per thread
6690 seccomp - Same as "prctl" above, but all seccomp threads
6698 on,auto - On Power8 and Power9 insert a store-forwarding
6702 off - No action.
6716 off - not enabled
6718 warn - the kernel will emit rate-limited warnings
6726 fatal - the kernel will send SIGBUS to applications
6731 ratelimit:N -
6751 Certain CPUs are vulnerable to an MDS-like
6771 This kernel-boot parameter defaults to 128,
6772 but takes effect only when the low-order four
6789 instead of the compile-time CONFIG_NR_CPUS.
6793 grace-period sequence counter wrap for the
6794 srcu_data structure's ->srcu_gp_seq_needed field.
6809 Specifies the number of no-delay instances
6816 Specifies the per-grace-period phase, number of
6817 non-sleeping polls of readers. Beyond this limit,
6823 Specifies number of microseconds of non-sleeping
6824 delay between each non-sleeping poll of readers.
6827 Specifies the number of update-side contention
6832 set for contention-based conversions to occur.
6842 force-on: Unconditionally enable mitigation for
6844 force-off: Unconditionally disable mitigation for
6867 stacktrace_filter=[function-list]
6869 will trace at boot up. function-list is a comma-separated
6877 Set the STI (builtin display/keyboard on the HP-PARISC
6879 as the initial boot-console.
6939 to global on non-NUMA machines)
6964 <int> -- Number of I/O TLB slabs
6965 <int> -- Second integer after comma. Number of swiotlb
6968 force -- force using of bounce buffers even if they
6970 noforce -- Never use bounce buffers (for debugging)
6985 Ignore sysrq setting - this boot parameter will
6993 cache size. See Documentation/networking/ip-sysctl.rst
7000 Specify "mem" (for Suspend-to-RAM) or "standby" (for
7005 wakeup-capable RTC alarm.
7011 -1: disable all active trip points in all thermal zones
7015 -1: disable all critical trip points in all thermal zones
7022 -1: disable all passive trip points
7028 <deci-seconds>: poll all this frequency
7032 Format: <size>[KMG],<size>[KMG]:<state>;<size>[KMG]-<size>[KMG]:<state>
7037 See Documentation/admin-guide/mm/transhuge.rst for more
7045 Format: <size>[KMG],<size>[KMG]:<policy>;<size>[KMG]-<size>[KMG]:<policy>
7051 See Documentation/admin-guide/mm/transhuge.rst for more
7063 Prevent the CPU-hotplug component of torturing
7067 Dump the ftrace buffer at torture-test shutdown,
7071 with rotating-rust storage.
7076 disables verbose-printk() sleeping.
7079 Duration of each verbose-printk() sleep in jiffies.
7104 https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
7142 local - Use the per CPU time stamp counter
7146 global - Event time stamps are synchronize across
7149 counter - Simple counting of events (1, 2, ..)
7153 uptime - Use jiffies as the time stamp.
7154 perf - Use the same clock that perf uses.
7155 mono - Use ktime_get_mono_fast_ns() for time stamps.
7156 mono_raw - Use ktime_get_raw_fast_ns() for time
7158 boot - Use ktime_get_boot_fast_ns() for time stamps.
7162 trace_event=[event-list]
7164 to facilitate early boot debugging. The event-list is a
7165 comma-separated list of trace events to enable. See
7176 trace_instance=[instance-info]
7201 traceoff - Have the tracing instance tracing disabled after it is created.
7202 traceprintk - Have trace_printk() write into this trace instance
7247 trace_options=[option-list]
7249 The option-list is a comma delimited list of options
7263 trace_trigger=[trigger-list]
7300 See Documentation/admin-guide/mm/transhuge.rst
7307 See Documentation/admin-guide/mm/transhuge.rst
7314 See Documentation/admin-guide/mm/transhuge.rst
7322 - "tpm"
7323 - "tee"
7324 - "caam"
7325 - "dcp"
7335 - "kernel"
7336 - the same value as trusted.source: "tpm" or "tee"
7337 - "default"
7358 high-resolution timer mode on older hardware, and in
7394 on - Enable TSX on the system. Although there are
7397 several previous speculation-related CVEs, and
7401 off - Disable TSX on the system. (Note that this
7409 auto - Disable TSX if X86_BUG_TAA is present,
7414 See Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
7420 Similar to Micro-architectural Data Sampling (MDS)
7435 full - Enable TAA mitigation on vulnerable CPUs
7438 full,nosmt - Enable TAA mitigation and disable SMT on
7441 vulnerable to cross-thread TAA attacks.
7442 off - Unconditionally disable TAA mitigation
7444 On MDS-affected machines, tsx_async_abort=off can be
7456 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
7462 See also Documentation/input/devices/joystick-parport.rst
7464 udbg-immortal [PPC] When debugging early kernel crashes that
7470 Set number of hash buckets for UDP/UDP-Lite connections
7472 uhci-hcd.ignore_oc=
7474 Some badly-designed motherboards generate lots of
7483 unwind_debug [X86-64,EARLY]
7491 (default -1 = authorized (same as 1),
7497 for newly-detected USB devices (default 2). This
7525 [USB] Specifies timeout for the initial 64-byte
7532 [USB] A list of quirk entries to augment the built-in
7535 VendorID:ProductID:Flags. The IDs are 4-digit hex
7537 will change the built-in quirk; setting it if it is
7542 a 255-byte read);
7546 Set-Interface requests);
7565 (bInterval-1).
7603 usb-storage.delay_use=
7610 usb-storage.quirks=
7612 override the built-in unusual_devs list. List
7615 and Product ID values (4-digit hex numbers) and
7617 to a common usb-storage quirk flag as follows:
7659 medium is write-protected).
7668 1 - undefined instruction events
7669 2 - system calls
7670 4 - invalid data aborts
7671 8 - SIGSEGV faults
7672 16 - SIGBUS faults
7688 vdso32= [X86] Control the 32-bit vDSO
7689 vdso32=1: enable 32-bit VDSO
7690 vdso32=0 or vdso32=2: disable 32-bit VDSO
7700 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
7731 vga= [BOOT,X86-32] Select a particular video mode
7733 Documentation/admin-guide/svga.rst.
7748 - Disable all of the above options
7772 vsyscall= [X86-64,EARLY]
7775 code). Most statically-linked binaries and older
7799 see vga-softcursor.rst. Default: 2 = underline.
7804 This is a 16-member array composed of values
7805 ranging from 0-255.
7810 This is a 16-member array composed of values
7811 ranging from 0-255.
7816 This is a 16-member array composed of values
7817 ranging from 0-255.
7822 Set system-wide default UTF-8 mode for all tty's.
7823 Default is 1, i.e. UTF-8 mode is enabled for all
7828 Format=<-1|0|1>
7829 Set system-wide default for whether a cursor
7830 is shown on new VTs. Default is -1,
7833 cursors, 1 will display them.
7835 vt.italic= [VT] Default color for italic text; 0-15.
7838 vt.underline= [VT] Default color for underlined text; 0-15.
7842 see Documentation/watchdog/watchdog-parameters.rst
7843 or other driver-specific files in the
7857 Format: <cpu-list>
7878 Per-cpu work items which run for longer than this
7881 them from noticeably delaying other per-cpu work
7899 Per-cpu workqueues are generally preferred because
7901 locality; unfortunately, per-cpu workqueues tend to
7904 Enabling this makes the per-cpu workqueues which
7918 Documentation/core-api/workqueue.rst.
7931 forces round-robin CPU selection to flush out
7939 on - Enable writecombine, use WUC for ioremap_wc()
7940 off - Disable writecombine, use SUC for ioremap_wc()
7942 x2apic_phys [X86-64,APIC,EARLY] Use x2apic physical mode instead of
7946 xen_512gb_limit [KNL,X86-64,XEN]
7956 ide-disks -- unplug primary master IDE devices
7957 aux-ide-disks -- unplug non-primary-master IDE devices
7958 nics -- unplug network devices
7959 all -- unplug all emulated devices (NICs and IDE disks)
7960 unnecessary -- unplugging emulated devices is
7963 never -- do not unplug even if version check succeeds
7977 Select whether to always use non-faulting (safe) MSR
7997 xen_timer_slop= [X86-64,XEN,EARLY]
8022 preferred over the 2-level event handling, as it is
8039 xive.store-eoi=off [PPC]
8045 xhci-hcd.quirks [USB,KNL]