Lines Matching +full:remoteproc +full:- +full:rpm
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.
442 0 -- disable.
443 1 -- enable.
446 arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
497 audit= [KNL] Enable the audit sub-system
499 0 | off - kernel audit is disabled and can not be
501 unset - kernel audit is initialized but disabled and
503 1 | on - kernel audit is initialized and partially
516 0 - Disable the BAU.
517 1 - Enable the BAU.
518 unset - Disable the BAU.
557 See Documentation/block/cmdline-partition.rst
571 See Documentation/admin-guide/bootconfig.rst
576 bttv.pll= See Documentation/admin-guide/media/bttv.rst
585 cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
604 inclusive. See arch/mips/include/asm/pgtable-bits.h
614 - foo isn't auto-mounted if you mount all cgroups in
616 - foo isn't visible as an individually mountable
618 - if foo is an optional feature then the feature is
624 Specifying "pressure" disables per-cgroup pressure
641 semi-legacy software can check this file to decide
650 nosocket -- Disable socket memory accounting.
651 nokmem -- Disable kernel memory accounting.
652 nobpf -- Disable BPF memory accounting.
657 0 -- check protection applied by kernel (includes
659 1 -- check protection requested by application.
671 numbers X. Note the Linux-specific bits are not necessarily
672 stable over kernel options, but the vendor-specific
692 force such clocks to be always-on nor does it reserve
696 information, see Documentation/driver-api/clk.rst.
698 clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
715 [X86-32] pit,hpet,tsc;
722 [X86-64] hpet,tsc
728 architected timer so that code using WFE-based polling
742 clocksource-wdtest.holdoff= [KNL]
748 cma=nn[MG]@[start[MG][-end[MG]]]
759 Sets the size of kernel per-numa memory area for
761 per-numa CMA altogether. And If this option is not
763 With per-numa CMA enabled, DMA users on node nid will
790 com20020= [HW,NET] ARCnet - COM20020 chipset
794 com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
798 ARCnet - COM90xx chipset (memory-mapped buffers)
827 See Documentation/admin-guide/serial-console.rst for more
842 $ ls -d /sys/bus/serial-base/devices/*:*.*/tty/*
843 /sys/bus/serial-base/devices/00:04:0.0/tty/ttyS0
856 Start an early, polled-mode console on the 8250/16550
859 MMIO inter-register address stride is either 8-bit
860 (mmio), 16-bit (mmio16), or 32-bit (mmio32).
864 the h/w is not re-initialized.
891 syscall, or to executing "dmesg -S --raw" or to reading
915 disable the cpuidle sub-system
921 disable the cpufreq sub-system
929 [X86,EARLY] Delay for N microsec between assert and de-assert
950 like Hyper-V, PowerPC (fadump) and AMD SEV-SNP.
958 [KNL, X86-64, ARM64, RISCV, LoongArch] Select a region
961 See Documentation/admin-guide/kdump/kdump.rst for further details.
966 start-[end] where start and end are both
968 Documentation/admin-guide/kdump/kdump.rst for an example.
971 [KNL, X86-64, ARM64, RISCV, LoongArch] range could be
979 [KNL, X86-64, ARM64, RISCV, LoongArch] range under 4G.
985 for 32-bit devices won't run out. Kernel would try to allocate
988 --> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB)
989 --> arm64: 128MiB
990 --> riscv: 128MiB
991 --> loongarch: 128MiB
1021 [KNL] Disable crypto self-tests
1029 csdlock_debug= [KNL] Enable or disable debug add-ons of cross-CPU
1044 See also Documentation/input/devices/joystick-parport.rst
1057 [KNL] verbose locking self-tests
1060 self-tests.
1062 (no extra messages), setting it to -1 (all bits set)
1063 will print _a_lot_ more information - normally only
1098 Format: { on, no-mount, off }
1100 no-mount:
1105 get a -EPERM as result when trying to register files
1109 Default value is set in build-time with a kernel configuration.
1121 Documentation/admin-guide/mm/hugetlbpage.rst.
1135 delayacct [KNL] Enable per-task delay accounting
1221 entries for DMA-API debugging code. One entry is
1222 required per DMA-API allocation. Use this if the
1223 DMA-API debugging code disables itself because the
1227 With this option the DMA-API debugging driver
1251 Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst
1276 Control how the dt_cpu_ftrs device-tree binding is
1286 what data is available or for reverse-engineering.
1291 Documentation/admin-guide/dynamic-debug-howto.rst
1302 determined by stdout-path property in device tree's
1307 Start an early, polled-mode console on a Cadence
1318 Start an early, polled-mode console on the 8250/16550
1320 MMIO inter-register address stride is either 8-bit
1321 (mmio) or 32-bit (mmio32 or mmio32be).
1331 Start an early, polled-mode console on a pl011 serial
1335 the driver will use only 32-bit accessors to read/write
1344 Start an early, polled-mode console on a meson serial
1350 Start an early, polled-mode console on an msm serial
1356 Start an early, polled-mode console on an msm serial
1362 Start an early, polled-mode console on a serial port
1368 Start an early, polled-mode console on a serial port
1374 Use RISC-V SBI (Supervisor Binary Interface) for early
1392 Start an early, polled-mode console on a lantiq serial
1406 Start an early, polled-mode, output-only console on the
1411 Start an early, polled-mode console on the
1417 Start an early, polled-mode console on a Qualcomm
1425 coherent non-x86 systems that use system memory for
1528 Documentation/admin-guide/acpi/ssdt-overlays.rst for details.
1545 elanfreq= [X86-32]
1553 See Documentation/admin-guide/kdump/kdump.rst for details.
1569 0 -- permissive (log only, no denials).
1570 1 -- enforcing (deny and log).
1603 See also Documentation/fault-injection/.
1607 See Documentation/admin-guide/sysctl/net.rst for
1611 See Documentation/admin-guide/blockdev/floppy.rst.
1613 forcepae [X86-32]
1620 fred= [X86-64]
1671 ftrace_filter=[function-list]
1673 tracer at boot up. function-list is a comma-separated
1678 ftrace_notrace=[function-list]
1680 function-list. This list can be changed at run time
1684 ftrace_graph_filter=[function-list]
1687 function-list is a comma-separated list of functions
1691 ftrace_graph_notrace=[function-list]
1693 function-list. This list is a comma-separated list of
1712 Format: { off | permissive | on | rpm }
1713 off -- Don't create device links from firmware info.
1714 permissive -- Create device links from firmware info
1717 on -- Create device links from firmware info and use it
1719 rpm -- Like "on", but also use to order runtime PM.
1723 dependencies. This only applies for fw_devlink=on|rpm.
1732 strict -- Default. Continue waiting on consumers to
1734 timeout -- Give up waiting on consumers and call
1744 See also Documentation/input/devices/joystick-parport.rst
1748 gart_fix_e820= [X86-64,EARLY] disable the fix e820 for K8 GART
1774 gcov_persist= [GCOV] When non-zero (default), profiling data for
1784 gpio-mockup.gpio_mockup_ranges
1787 gpio-mockup.gpio_mockup_named_lines
1819 against bounds-checking flaws in the kernel's
1827 [KNL] Should the hard-lockup detector generate
1843 auto - Hash pointers unless slab_debug is enabled.
1844 always - Always hash pointers (even if slab_debug is
1846 never - Never hash pointers. This option should only
1854 for 64-bit NUMA, off otherwise.
1862 corresponding firmware-first mode error processing
1872 during restoration read-only).
1916 hpet= [X86-32,HPET] option to control HPET usage
1933 number of pages to allocate per-node can be specified.
1934 See also Documentation/admin-guide/mm/hugetlbpage.rst.
1945 Documentation/admin-guide/mm/hugetlbpage.rst.
1955 Note that this parameter only applies to non-gigantic huge pages.
1965 boot-time allocation of gigantic hugepages is skipped.
2000 by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
2006 hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
2028 Set device-properties for ACPI-enumerated I2C-attached
2029 touchscreen, to e.g. fix coordinates of upside-down
2037 Omit "=<val>" entirely Set a boolean device-property
2038 Unsigned number Set a u32 device-property
2039 Anything else Set a string device-property
2042 i2c_touchscreen_props=GDIX1001:touchscreen-inverted-x:
2043 touchscreen-inverted-y
2045 i2c_touchscreen_props=MSSL1680:touchscreen-size-x=1920:
2046 touchscreen-size-y=1080:touchscreen-inverted-y:
2047 firmware-name=gsl1680-vendor-model.fw:silead,home-button
2052 (disabled by default, and as a pre-condition
2054 i8042.direct [HW] Put keyboard port into non-translated mode
2068 suspend-to-ram transitions, only during s2r
2092 -1 -- never invert brightness
2093 0 -- machine default
2094 1 -- force brightness inversion
2096 ia32_emulation= [X86-64]
2098 When true, allows loading 32-bit programs and executing 32-bit
2123 idle=nomwait: Disable mwait for CPU C-states
2151 legacy only accept legacy-NaN binaries, if supported
2153 2008 only accept 2008-NaN binaries, if supported
2164 'relaxed' straps the emulator for both legacy-NaN and
2165 2008-NaN, whereas 'strict' enables legacy-NaN only on
2174 Ignore loglevel setting - this will print /all/
2241 Formats: { "ima" | "ima-ng" | "ima-ngv2" | "ima-sig" |
2242 "ima-sigv2" }
2243 Default: "ima-ng"
2281 stuff: Deploy RSB-fill mitigation when retpoline is
2286 Documentation/admin-guide/hw-vuln/indirect-target-selection.rst
2297 initcall_blacklist= [KNL] Do not execute a comma-separated list of
2298 initcall functions. Useful for debugging built-in
2343 0 -- basic integrity auditing messages. (Default)
2344 1 -- additional integrity auditing messages.
2372 could harm performance of some high-throughput
2381 1 to 9 specify maximum depth of C-state.
2390 algorithms for p-state selection. There are two
2391 P-state selection algorithms provided by
2394 on whether or not the hardware managed P-states
2401 used along with the hardware-managed P-states (HWP)
2405 in favor of acpi-cpufreq. Forcing the intel_pstate driver
2406 instead of acpi-cpufreq may disable platform features, such
2408 P-States information being indicated to OSPM and therefore
2411 or on platforms that use pcc-cpufreq instead of acpi-cpufreq.
2424 Allow per-logical-CPU P-State performance control limits using
2427 Do not enable capacity-aware scheduling (CAS) on
2430 intremap= [X86-64,Intel-IOMMU,EARLY]
2435 BIOS x2APIC opt-out request will be ignored
2478 AMD Gart HW IOMMU-specific options:
2497 Do scatter-gather (SG) merging. Implies "force"
2501 Don't do scatter-gather (SG) merging.
2514 0 - Try to allocate a 32-bit DMA address first, before
2516 1 - Allocate directly from the full usable range,
2518 greater than 32-bit addressing.
2522 0 - Lazy mode.
2528 1 - Strict mode.
2531 unset - Use value of CONFIG_IOMMU_DEFAULT_DMA_{LAZY,STRICT}.
2533 legacy driver-specific options takes precedence.
2538 0 - Use IOMMU translation for DMA.
2539 1 - Bypass the IOMMU for DMA.
2540 unset - Use value of CONFIG_IOMMU_DEFAULT_PASSTHROUGH.
2542 io7= [HW] IO7 for Marvel-based Alpha systems
2557 See Documentation/admin-guide/nfs/nfsroot.rst.
2593 Enables support for pseudo-NMIs in the kernel. This
2598 [RISC-V,EARLY]
2600 as IPIs. Intended for system where IMSIC is trap-n-emulated,
2619 [Deprecated - use cpusets instead]
2620 Format: [flag-list,]<cpu-list>
2653 "number of CPUs in system - 1".
2679 The format of <cpu-list> is described above.
2683 ivrs_ioapic [HW,X86-64]
2684 Provide an override to the IOAPIC-ID<->DEVICE-ID
2688 For example, to map IOAPIC-ID decimal 10 to
2694 * To map IOAPIC-ID decimal 10 to PCI device 00:14.0
2697 * To map IOAPIC-ID decimal 10 to PCI segment 0x1 and
2701 ivrs_hpet [HW,X86-64]
2702 Provide an override to the HPET-ID<->DEVICE-ID
2706 For example, to map HPET-ID decimal 10 to
2712 * To map HPET-ID decimal 0 to PCI device 00:14.0
2715 * To map HPET-ID decimal 10 to PCI segment 0x1 and
2719 ivrs_acpihid [HW,X86-64]
2720 Provide an override to the ACPI-HID:UID<->DEVICE-ID
2724 For example, to map UART-HID:UID AMD0020:0 to
2730 * To map UART-HID:UID AMD0020:0 to PCI segment is 0,
2733 * To map UART-HID:UID AMD0020:0 to PCI segment 0x1 and
2757 the kernel for non-movable allocations. The requested
2767 subsystem. Note that allocations like PTEs-from-HighMem
2775 for non-movable allocations and remaining memory is used
2786 gdb or control-c on the dbgp connection. When
2787 not using this parameter you use sysrq-g to break into
2792 or a supported polling keyboard driver (non-usb).
2821 "0" | "off" | "n" - kexec handover is disabled
2822 "1" | "on" | "y" - kexec handover is enabled
2828 ranges that can only be used for non-kernel
2839 parameter defines the size of additional per-node
2844 Configure the RouterBoard 532 series on-chip
2847 kmemleak= [KNL,EARLY] Boot-time kmemleak enable/disable
2853 kprobe_event=[probe-list]
2855 The probe-list is a semicolon delimited list of probe
2885 execution by eliminating the write-protection faults
2912 virtualization on-demand when creating and destroying
2920 is that doing so may interfere with using out-of-tree
2947 back to huge pages. If the value is a non-zero N, KVM will
2952 kvm-amd.nested= [KVM,AMD] Control nested virtualization feature in
2955 kvm-amd.npt= [KVM,AMD] Control KVM's use of Nested Page Tables,
2956 a.k.a. Two-Dimensional Page Tables. Default is 1
2960 kvm-arm.mode=
2966 nvhe: Standard nVHE-based mode, without support for
2973 nested: VHE-based mode with support for nested
2981 command-line.
2985 kvm-arm.vgic_v3_group0_trap=
2986 [KVM,ARM,EARLY] Trap guest accesses to GICv3 group-0
2989 kvm-arm.vgic_v3_group1_trap=
2990 [KVM,ARM,EARLY] Trap guest accesses to GICv3 group-1
2993 kvm-arm.vgic_v3_common_trap=
2997 kvm-arm.vgic_v4_enable=
3001 kvm-arm.wfe_trap_policy=
3010 kvm-arm.wfi_trap_policy=
3027 kvm-intel.ept= [KVM,Intel] Control KVM's use of Extended Page Tables,
3028 a.k.a. Two-Dimensional Page Tables. Default is 1
3032 kvm-intel.emulate_invalid_guest_state=
3034 state. Ignored if kvm-intel.enable_unrestricted_guest=1,
3040 kvm-intel.flexpriority=
3045 kvm-intel.nested=
3049 kvm-intel.unrestricted_guest=
3055 kvm-intel.vmentry_l1d_flush=[KVM,Intel] Mitigation for L1 Terminal Fault
3056 CVE-2018-3620.
3067 kvm-intel.vpid= [KVM,Intel] Control KVM's use of Virtual Processor
3087 on - enable the interface for the mitigation
3152 For details see: Documentation/admin-guide/hw-vuln/l1tf.rst
3158 lapic [X86-32,APIC,EARLY] Enable the local APIC even if BIOS
3162 value for LAPIC timer one-shot implementation. Default
3185 libata.force= [LIBATA] Force configurations. The format is a comma-
3197 first fan-out link behind PMP device. It does not
3211 * Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
3218 * rstonce: only attempt one reset during hot-unplug
3261 * external: Mark port as external (hotplug-capable).
3315 Specify the number of self-propagating call_rcu()
3323 occasional long-duration lock hold time. Defaults
3334 Set the number of locking read-acquisition kthreads.
3339 Set the number of locking write-acquisition kthreads.
3342 Set time (s) after boot for CPU-hotplug testing.
3345 Set time (s) between CPU-hotplug operations, or
3346 zero to disable CPU-hotplug testing.
3349 Do periodic testing of real-time lock priority
3354 non-real-time spinlocks, due to their disabling
3355 of preemption. Note that non-realtime mutexes
3368 Set task-shuffle interval (jiffies). Shuffling
3369 tasks allows some CPUs to go into dyntick-idle
3374 is useful for hands-off automated testing.
3393 Run the write-side locktorture kthreads at
3394 sched_set_fifo() real-time priority.
3412 7 (KERN_DEBUG) debug-level messages
3424 logo.nologo [FB] Disables display of the built-in Linux logo.
3442 an IEEE 1284-compliant printer is attached; if
3448 time-consuming boot-time autodetection (up to 250 ms per
3468 Example: machtype=lemote-yeeloong-2f-7inch
3480 (loop.max_loop) unconditionally pre-created at init time. The default
3483 devices can be requested on-demand with the
3484 /dev/loop-control interface.
3486 mce= [X86-{32,64}]
3523 do not opt-in to Local MCE delivery. Use legacy method
3544 don't overwrite the bios-set CMCI threshold. This boot
3553 force-enable recoverable machine check code paths
3559 See Documentation/admin-guide/md.rst.
3566 Control mitigation for the Micro-architectural Data
3581 full - Enable MDS mitigation on vulnerable CPUs
3582 full,nosmt - Enable MDS mitigation and disable
3584 off - Unconditionally disable MDS mitigation
3586 On TAA-affected machines, mds=off can be prevented by
3595 For details see: Documentation/admin-guide/hw-vuln/mds.rst
3610 [ARC,MICROBLAZE] - the limit applies only to low memory,
3613 [ARM64] - only limits memory covered by the linear
3626 [ARM,MIPS,EARLY] - override the memory layout
3633 mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
3640 per-device physically contiguous DMA buffers.
3648 See Documentation/admin-guide/mm/memory-hotplug.rst.
3673 Example: Exclude memory from 0x18690000-0x1869ffff
3687 memmap=<size>%<offset>-<oldtype>+<newtype>
3689 from <oldtype> to <newtype>. If "-<oldtype>" is left
3704 repeatable BIOS-originated corruption always
3748 mem_encrypt= [X86-64] AMD Secure Memory Encryption (SME) control
3754 Refer to Documentation/virt/kvm/x86/amd-memory-encryption.rst
3758 s2idle - Suspend-To-Idle
3759 shallow - Power-On Suspend or equivalent (if supported)
3760 deep - Suspend-To-RAM or equivalent (if supported)
3761 See Documentation/admin-guide/pm/sleep-states.rst.
3763 mfgptfix [X86-32] Fix MFGPT timers on AMD Geode platforms when
3779 0 - The attached screen is the 3.5" TFT
3780 1 - The attached screen is the 7" TFT
3781 2 - The VGA Shield is attached (1024x768)
3785 b - Enable backlight. The TFT backlight pin will be
3789 c - Enable the s3c camera interface.
3790 t - Reserved for enabling touchscreen support. The
3794 https://repo.or.cz/w/linux-2.6/mini2440.git
3799 arch-independent options, each of which is an
3800 aggregation of existing arch-specific options.
3830 ssbd=force-off [ARM64]
3843 have other ways of avoiding SMT-based attacks.
3857 supports attack-vector based controls as documented in
3858 Documentation/admin-guide/hw-vuln/attack_vector_controls.rst
3882 full - Enable mitigation on vulnerable CPUs
3884 full,nosmt - Enable mitigation and disable SMT on
3887 off - Unconditionally disable mitigation
3900 Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst
3930 module_blacklist= [KNL] Do not load a comma-separated list of
3955 movable_node [KNL,EARLY] Boot-time switch to make hotplugable memory
3962 Format: <name>,<region-number>,<size>,<offset>
3965 <name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
4004 something different and driver-specific.
4044 [NFS] enable 64-bit inode numbers.
4045 If zero, the NFS client will fake up a 32-bit inode
4047 of returning the full 64-bit number.
4048 The default is to return 64-bit inode numbers.
4083 [NFS4] Specify an additional fixed unique ident-
4114 driver. A non-zero value sets the minimum interval
4119 server-to-server copies for which this server is
4131 server-to-server copy, knfsd temporarily mounts
4138 See Documentation/admin-guide/nfs/nfsroot.rst.
4140 nfsroot= [NFS] nfs root filesystem for disk-less boxes.
4141 See Documentation/admin-guide/nfs/nfsroot.rst.
4144 See Documentation/admin-guide/nfs/nfsroot.rst.
4148 NMI stack-backtrace request.
4157 0 - turn hardlockup detector in nmi_watchdog off
4158 1 - turn hardlockup detector in nmi_watchdog on
4159 rNNN - configure the watchdog with raw perf event 0xNNN
4172 no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
4176 no4lvl [RISCV,EARLY] Disable 4-level and 5-level paging modes.
4177 Forces kernel to use 3-level paging instead.
4179 no5lvl [X86-64,RISCV,EARLY] Disable 5-level paging mode. Forces
4180 kernel to use 4-level paging instead.
4215 no_entry_flush [PPC,EARLY] Don't flush the L1-D cache when entering the kernel.
4217 noexec32 [X86-64]
4218 This affects only 32-bit executables.
4219 noexec32=on: enable non-executable mappings (default)
4221 noexec32=off: disable non-executable mappings
4232 nofxsr [BUGS=X86-32] Disables x86 floating point extended
4234 legacy floating-point registers on task switch.
4279 nointremap [X86-64,Intel-IOMMU,EARLY] Do not enable interrupt
4281 [Deprecated - use intremap=off]
4287 noirqdebug [X86-32] Disables the code which attempts to detect and
4297 no-kvmapf [X86,KVM,EARLY] Disable paravirtualized asynchronous page
4300 no-kvmclock [X86,KVM,EARLY] Disable paravirtualized KVM clock driver
4302 nolapic [X86-32,APIC,EARLY] Do not enable or use the local APIC.
4304 nolapic_timer [X86-32,APIC,EARLY] Do not use the local APIC timer.
4306 nomce [X86-32] Disable Machine Check Exception
4308 nomfgpt [X86-32] Disable Multi-Function General Purpose
4314 not load if they could possibly displace the pre-
4317 perform display-mode changes or accelerated rendering.
4330 nopcid [X86-64,EARLY] Disable the PCID cpu feature.
4335 nopti [X86-64,EARLY]
4351 noreplace-smp [X86-32,SMP] Don't replace SMP instructions
4357 no-scroll [VGA] Disables scrollback.
4358 This is required for the Braillex ib80-piezo Braille
4361 nosgx [X86-64,SGX,EARLY] Disables Intel SGX kernel support.
4381 nosoftlockup [KNL] Disable the soft-lockup detector.
4387 nospectre_bhb [ARM64,EARLY] Disable all mitigations for Spectre-BHB (branch
4400 no-steal-acc [X86,PV_OPS,ARM64,PPC/PSERIES,RISCV,LOONGARCH,EARLY]
4407 timer IRQ sources, i.e., the IO-APIC timer. This can
4412 [PPC,EARLY] Don't flush the L1-D cache after accessing user data.
4425 no-vmw-sched-clock
4430 soft-lockup and NMI watchdog (hard-lockup).
4434 nox2apic [X86-64,APIC,EARLY] Do not enable x2APIC mode.
4442 enabling legacy floating-point and sse state.
4464 n. So during boot up some boot time memory for per-cpu
4465 variables need be pre-allocated for later physical cpu
4492 soft-reserved memory partitioning.
4501 See Documentation/admin-guide/sysctl/vm.rst for details.
4504 See Documentation/core-api/debugging-via-ohci1394.rst for more
4519 onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration
4523 boundary - index of last SLC block on Flex-OneNAND.
4525 lock - Configure if Flex-OneNAND boundary should be locked.
4544 page_owner= [KNL,EARLY] Boot-time page_owner enabling option.
4550 page_poison= [KNL,EARLY] Boot-time parameter changing the state of
4578 See Documentation/admin-guide/tainted-kernels.rst for
4650 Set to non-zero to probe primary and secondary ISA
4656 Set to non-zero if a chip is present that snoops speed
4704 Set to non-zero to probe tertiary and further ISA
4720 Set to non-zero to probe QDI controllers. By default
4725 Set to non-zero to probe Winbond controllers. Use
4772 bios [X86-32] force use of PCI BIOS, don't access
4774 has a non-standard PCI host bridge.
4775 nobios [X86-32] disallow use of PCI BIOS, only direct
4781 data in IO port 0xCFC, both 32-bit).
4783 Mechanism 2 (IO port 0xCF8 is an 8-bit port for
4784 the function, IO port 0xCFA, also 8-bit, sets
4786 through ports 0xC000-0xCFFF).
4793 root domains (aka PCI segments, in ACPI-speak).
4801 disable the use of MSI interrupts system-wide.
4806 primary IO-APIC for bridges that cannot disable
4813 biosirq [X86-32] Use PCI BIOS calls to get the interrupt
4837 F0000h-100000h range.
4842 assign-busses [X86] Always assign all PCI bus
4863 <linux-pci@vger.kernel.org>.
4867 a bug to <linux-pci@vger.kernel.org>.
4879 bfsort Sort PCI devices into breadth-first order.
4882 nobfsort Don't sort PCI devices into breadth-first order.
4884 tuning and use the BIOS-configured MPS defaults.
4894 configuration allows peer-to-peer DMA between
4897 that hot-added devices will work.
4912 A PCI-PCI bridge can be specified if resource
4918 for 4096-byte alignment.
4920 end-to-end CRC checking). Only effective if
4951 noats [PCIE, Intel-IOMMU, AMD-IOMMU]
4982 bit-0 : ACS Source Validation
4983 bit-1 : ACS Translation Blocking
4984 bit-2 : ACS P2P Request Redirect
4985 bit-3 : ACS P2P Completion Redirect
4986 bit-4 : ACS Upstream Forwarding
4987 bit-5 : ACS P2P Egress Control
4988 bit-6 : ACS Direct Translated P2P
4998 Validation unchanged from whatever power-up
5010 system-wide.
5024 dpc-native Use native PCIe service for DPC only. May
5041 Keep all power-domains already enabled by bootloader on,
5059 pirq= [SMP,APIC] Manual mp-table setup
5060 See Documentation/arch/x86/i386/IO-APIC.rst.
5064 See also Documentation/admin-guide/parport.rst.
5083 resume of devices during system-wide power transitions.
5085 dependencies are not well-defined, or for debugging
5095 CONFIG_PNP_DEBUG_MESSAGES option). Change at run-time
5104 { on | off | curr | res | no-curr | no-res }
5149 none - Limited to cond_resched() calls
5150 voluntary - Limited to cond_resched() and might_sleep() calls
5151 full - Any section that isn't explicitly preempt disabled
5155 lazy - Scheduler controlled. Similar to full but instead
5161 print-fatal-signals=
5167 coredump - etc.
5170 you might want to try "ulimit -i unlimited".
5182 or lockdep-detected issues (only if lock debug is on).
5190 Allows storing messages from non-panic CPUs into
5192 flushed to consoles by the panic-CPU on
5193 a best-effort basis.
5199 on - unlimited logging to /dev/kmsg from userspace
5200 off - logging to /dev/kmsg disabled
5201 ratelimit - ratelimit the logging
5212 - 'always': traditional behavior always allows mem overrides.
5213 - 'ptrace': only allow mem overrides for active ptracers.
5214 - 'never': never allow mem overrides.
5218 Limit processor to maximum C-state
5222 Ignore the _CST method to determine C-states,
5229 Param: "schedule" - profile schedule points.
5230 Param: "kvm" - profile VM exits.
5231 Param: <number> - step/bucket size as a power of 2 for
5262 pti= [X86-64] Control Page Table Isolation of user and
5267 on - unconditionally enable
5268 off - unconditionally disable
5269 auto - kernel detects whether your CPU model is
5275 [KNL] Number of legacy pty's. Overwrites compiled-in
5287 See Documentation/admin-guide/md.rst.
5290 See Documentation/admin-guide/blockdev/ramdisk.rst.
5309 cross-syscall address exposures. This is only
5315 ras=option[,option,...] [KNL] RAS-specific options
5321 rcu_nocbs[=cpu-list]
5326 enable the no-callback CPU mode, which prevents
5331 "p" for RCU-preempt, "s" for RCU-sched, and "g"
5335 and real-time workloads. It can also improve
5339 list of CPUs is set to no-callback mode from boot.
5343 no-callback mode from boot but the mode may be
5354 This improves the real-time response for the
5365 Do only a one-line RCU CPU stall warning when
5366 there is an ongoing too-long CSD-lock wait.
5372 If triggered before the RCU grace-period machinery
5382 RCU grace-period cleanup.
5386 RCU grace-period initialization.
5390 RCU grace-period pre-initialization, that is,
5391 the propagation of recent CPU-hotplug changes up
5395 Set delay from grace-period initialization to
5408 soliciting quiescent-state help from
5420 Set the SCHED_FIFO priority of the RCU per-CPU
5423 and for the RCU grace-period kthreads (rcu_bh,
5425 set, valid values are 1-99 and the default is 1
5426 (the least-favored priority). Otherwise, when
5427 RCU_BOOST is not set, valid values are 0-99 and
5428 the default is zero (non-realtime operation).
5433 On callback-offloaded (rcu_nocbs) CPUs,
5436 use of the ->nocb_bypass list. However, in the
5437 common non-flooded case, RCU queues directly to
5438 the main ->cblist in order to avoid the extra
5439 overhead of the ->nocb_bypass list and its lock.
5441 a single jiffy, RCU pre-queues the callbacks into
5442 the ->nocb_bypass queue. The definition of "too
5446 On callback-offloaded (rcu_nocbs) CPUs, avoid
5459 batch limiting is re-enabled.
5463 RCU's force-quiescent-state scan will aggressively
5471 Set the page-cache refill delay (in milliseconds)
5472 in response to low-memory conditions. The range
5476 Set the shift-right count to use to compute
5477 the callback-invocation batch limit bl from
5484 Please note that this callback-invocation batch
5485 limit applies only to non-offloaded callback
5494 cache-to-cache transfer latencies.
5500 and for NUMA systems with large remote-access
5516 the wakeup overhead on the global grace-period
5518 each group's NOCB grace-period kthread.
5521 Cause the grace-period kthread to get an extra
5523 it should at force-quiescent-state time.
5536 this specifies an rcu_read_unlock()-time delay
5540 of RCU-protected pointers after the relevant
5550 per-CPU rcuc kthreads. Defaults to a non-zero
5580 grace-period primitives such as call_rcu().
5591 grace-period primitives.
5594 Set test-start holdoff period. The purpose of
5612 Test the double-argument variant of kfree_rcu().
5614 rcuscale.kfree_rcu_test_single, both the single-
5615 and double-argument variants are tested.
5618 Test the single-argument variant of kfree_rcu().
5620 rcuscale.kfree_rcu_test_double, both the single-
5621 and double-argument variants are tested.
5635 does not affect the data-collection interval,
5640 Set number of RCU readers. The value -1 selects
5642 "n" less than -1 selects N-n+1, where N is again
5643 the number of CPUs. For example, -2 selects N
5644 (the number of CPUs), -3 selects N+1, and so on.
5645 A value of "n" less than or equal to -N selects
5658 complete. This is useful for hands-off automated
5665 Write-side holdoff between grace periods,
5670 Additional write-side holdoff between grace
5688 for RCU grace-period forward-progress testing
5695 Specify the fraction of a CPU-stall-warning
5696 period to do tight-loop forward-progress testing.
5700 forward-progress tests.
5704 need_resched() during tight-loop forward-progress
5708 Use conditional/asynchronous update-side
5709 normal-grace-period primitives, if available.
5712 Use conditional/asynchronous update-side
5713 expedited-grace-period primitives, if available.
5716 Use conditional/asynchronous update-side
5717 normal-grace-period primitives that also take
5722 Use conditional/asynchronous update-side
5723 expedited-grace-period primitives that also take
5747 Use expedited update-side primitives, if available.
5750 Use normal (non-expedited) asynchronous
5751 update-side primitives, if available.
5754 Use polled update-side normal-grace-period
5758 Use polled update-side expedited-grace-period
5762 Use polled update-side normal-grace-period
5767 Use polled update-side expedited-grace-period
5791 Use normal (non-expedited) synchronous
5792 update-side primitives, if available. If all
5796 they are all non-zero.
5799 Enable grace-period wrap lag testing. Setting
5804 Set the value for grace-period wrap lag during
5819 the grace-period wrap lag will be set to the
5829 Leak an RCU-protected pointer out of the reader.
5844 Set number of RCU callback-offload togglers.
5849 callback-offload toggling attempts.
5852 Set number of RCU readers. The value -1 selects
5853 N-1, where N is the number of CPUs. A value
5854 "n" less than -1 selects N-n-2, where N is again
5855 the number of CPUs. For example, -2 selects N
5856 (the number of CPUs), -3 selects N+1, and so on.
5859 Enable debug-object double-call_rcu() testing.
5862 Set time (s) after boot for CPU-hotplug testing.
5865 Set time (jiffies) between CPU-hotplug operations,
5866 or zero to disable CPU-hotplug testing.
5870 by a high-priority FIFO real-time task. Set to
5879 second) between preemptions by a high-priority
5880 FIFO real-time task. This delay is mediated
5885 The number of times in a given read-then-exit
5886 episode that a set of read-then-exit kthreads
5891 read-then-exit testing episodes.
5896 are entered from low-order bit up, and are
5898 0x1 bit is normal readers, 0x2 NMI-safe readers,
5899 and 0x4 light-weight readers.
5902 Set task-shuffle interval (s). Shuffling tasks
5903 allows some CPUs to go into dyntick-idle mode
5908 is useful for hands-off automated testing.
5917 any other stall-related activity. Note that
5923 in scheduling-while-atomic splats.
5942 grace-period kthread to test RCU CPU stall
5966 of RCU priority-boost testing. Defaults to zero,
5973 Test RCU's dyntick-idle handling. See also the
6028 Use expedited grace-period primitives, for
6032 real-time latency, and degrade energy efficiency.
6036 Use only normal grace-period primitives,
6039 real-time latency, CPU utilization, and
6041 increased grace-period latency. This parameter
6048 only normal grace-period primitives. No effect
6054 post-boot attempt at an expedited RCU grace
6055 period to instead use normal non-expedited
6056 grace-period processing.
6064 set to the default value of -1.
6067 Set the minimum number of callback-queuing-time
6068 lock-contention events per jiffy required to
6069 cause the RCU Tasks flavors to switch to per-CPU
6072 the default value of -1.
6077 of -1 allows this to be automatically (and
6085 number avoids disturbing real-time workloads,
6090 cancel laziness on that CPU. Use -1 to disable
6100 only printed prior to the stall-warning message
6148 force - Override the decision by the kernel to hide the
6187 There are some built-in platform specific "quirks"
6188 - you may see: "reboot: <name> series board detected.
6192 built-in quirk table, and use the generic default
6225 Set test-start holdoff period. The purpose of
6240 but the default has already reduced the per-pass
6245 Set number of readers. The default value of -1
6254 Set the read-side critical-section duration,
6258 Specify the read-protection implementation to test.
6284 See Documentation/admin-guide/cgroup-v1/cpusets.rst.
6314 reservetop= [X86-32,EARLY]
6331 See Documentation/power/swsusp-and-swap-files.rst
6347 AMD-based UNRET and IBPB mitigations alone do not stop
6349 sibling threads. For that reason, STIBP is used on pro-
6353 off - no mitigation
6354 auto - automatically select a migitation
6355 auto,nosmt - automatically select a mitigation,
6359 ibpb - On AMD, mitigate short speculation
6364 ibpb,nosmt - Like "ibpb" above but will disable SMT
6368 unret - Force enable untrained return thunks,
6369 only effective on AMD f15h-f17h based
6371 unret,nosmt - Like unret, but will disable SMT when STIBP
6403 ro [KNL] Mount root device read-only on boot
6406 on Mark read-only kernel memory as read-only (default).
6407 off Leave read-only kernel memory writable for debugging.
6408 full Mark read-only kernel memory and aliases as read-only
6415 debug-uart get routed to the D+ and D- pins of the usb
6421 block/early-lookup.c for details.
6442 [KNL,ARM,CMA] Remoteproc physical memory block.
6451 rw [KNL] Mount root device read-write on boot
6480 solution to mutex-based priority inversion.
6510 to 10 seconds for built-in smp_call_function()
6517 that requesting even small non-zero numbers of
6524 The default of -1 specifies a number of kthreads
6529 test before initiating CPU-hotplug operations.
6533 CPU-hotplug operations. Specifying zero (which
6534 is the default) disables CPU-hotplug operations.
6540 Non-zero values are useful for automated tests.
6563 "wait" parameter. A value of -1 selects the
6564 default if all other weights are -1. However,
6566 value of -1 will instead select a weight of zero.
6571 non-zero "wait" parameter. See weight_single.
6584 non-zero "wait" parameter. See weight_single
6596 non-zero "wait" parameter. See weight_single
6607 0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
6608 1 -- enable.
6619 0 -- disable.
6620 1 -- enable.
6623 serialnumber [BUGS=X86-32]
6625 sev=option[,option...] [X86-64]
6631 Do not enable SEV-SNP (applies to host/hypervisor
6634 SEV-SNP guests.
6642 to set it to "all" by meaning -- no limit here.
6654 Documentation/admin-guide/mm/slab.rst.
6665 Documentation/admin-guide/mm/slab.rst.
6681 Documentation/admin-guide/mm/slab.rst.
6687 Documentation/admin-guide/mm/slab.rst.
6702 Documentation/admin-guide/mm/slab.rst.
6729 using the csdlock_debug- kernel parameter.
6734 system. By default, let CSD-lock acquisition
6736 for this value provides a 5-minute timeout.
6738 smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
6739 smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
6740 smsc-ircc2.ircc_sir= [HW] SIR base I/O port
6741 smsc-ircc2.ircc_fir= [HW] FIR base I/O port
6742 smsc-ircc2.ircc_irq= [HW] IRQ line
6743 smsc-ircc2.ircc_dma= [HW] DMA channel
6744 smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
6754 Default: -1 (no limit)
6757 [KNL] Should the soft-lockup detector generate panics.
6760 A value of 1 instructs the soft-lockup detector
6761 to panic the machine when a soft-lockup occurs. It is
6764 respective build-time switch to that functionality.
6767 [KNL] Should the soft-lockup detector generate
6772 See Documentation/admin-guide/laptops/sonypi.rst
6779 on - (default) Enable the HW or SW mitigation as
6782 vmexit - On systems which don't have the HW mitigation
6785 protected from VM-originated BHI attacks, but
6787 off - Disable the mitigation.
6794 on - unconditionally enable, implies
6796 off - unconditionally disable, implies
6798 auto - kernel detects whether your CPU model is
6817 retpoline - replace indirect branches
6818 retpoline,generic - Retpolines
6819 retpoline,lfence - LFENCE; indirect branch
6820 retpoline,amd - alias for retpoline,lfence
6821 eibrs - Enhanced/Auto IBRS
6822 eibrs,retpoline - Enhanced/Auto IBRS + Retpolines
6823 eibrs,lfence - Enhanced/Auto IBRS + LFENCE
6824 ibrs - use IBRS to protect kernel
6834 on - Unconditionally enable mitigations. Is
6837 off - Unconditionally disable mitigations. Is
6840 prctl - Indirect branch speculation is enabled,
6846 - Like "prctl" above, but only STIBP is
6852 - Same as "prctl" above, but all seccomp
6857 - Like "seccomp" above, but only STIBP is
6862 auto - Kernel selects the mitigation depending on
6873 off - Disable mitigation
6874 microcode - Enable microcode mitigation only
6875 safe-ret - Enable sw-only safe RET mitigation (default)
6876 ibpb - Enable mitigation by issuing IBPB on
6878 ibpb-vmexit - Issue IBPB only on VMEXIT
6879 (cloud-specific mitigation)
6904 on - Unconditionally disable Speculative Store Bypass
6905 off - Unconditionally enable Speculative Store Bypass
6906 auto - Kernel detects whether the CPU model contains an
6912 prctl - Control Speculative Store Bypass per thread
6916 seccomp - Same as "prctl" above, but all seccomp threads
6924 on,auto - On Power8 and Power9 insert a store-forwarding
6928 off - No action.
6942 off - not enabled
6944 warn - the kernel will emit rate-limited warnings
6952 fatal - the kernel will send SIGBUS to applications
6957 ratelimit:N -
6977 Certain CPUs are vulnerable to an MDS-like
6997 This kernel-boot parameter defaults to 128,
6998 but takes effect only when the low-order four
7015 instead of the compile-time CONFIG_NR_CPUS.
7019 grace-period sequence counter wrap for the
7020 srcu_data structure's ->srcu_gp_seq_needed field.
7035 Specifies the number of no-delay instances
7042 Specifies the per-grace-period phase, number of
7043 non-sleeping polls of readers. Beyond this limit,
7049 Specifies number of microseconds of non-sleeping
7050 delay between each non-sleeping poll of readers.
7053 Specifies the number of update-side contention
7058 set for contention-based conversions to occur.
7068 force-on: Unconditionally enable mitigation for
7070 force-off: Unconditionally disable mitigation for
7092 stack traces. Pools are allocated on-demand up to this
7098 stacktrace_filter=[function-list]
7100 will trace at boot up. function-list is a comma-separated
7108 Set the STI (builtin display/keyboard on the HP-PARISC
7110 as the initial boot-console.
7170 to global on non-NUMA machines)
7195 <int> -- Number of I/O TLB slabs
7196 <int> -- Second integer after comma. Number of swiotlb
7199 force -- force using of bounce buffers even if they
7201 noforce -- Never use bounce buffers (for debugging)
7216 Ignore sysrq setting - this boot parameter will
7224 cache size. See Documentation/networking/ip-sysctl.rst
7231 Specify "mem" (for Suspend-to-RAM) or "standby" (for
7236 wakeup-capable RTC alarm.
7242 -1: disable all active trip points in all thermal zones
7246 -1: disable all critical trip points in all thermal zones
7253 -1: disable all passive trip points
7259 <deci-seconds>: poll all this frequency
7263 Format: <size>[KMG],<size>[KMG]:<state>;<size>[KMG]-<size>[KMG]:<state>
7268 See Documentation/admin-guide/mm/transhuge.rst for more
7276 Format: <size>[KMG],<size>[KMG]:<policy>;<size>[KMG]-<size>[KMG]:<policy>
7282 See Documentation/admin-guide/mm/transhuge.rst for more
7294 Prevent the CPU-hotplug component of torturing
7298 Dump the ftrace buffer at torture-test shutdown,
7302 with rotating-rust storage.
7307 disables verbose-printk() sleeping.
7310 Duration of each verbose-printk() sleep in jiffies.
7343 https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
7381 local - Use the per CPU time stamp counter
7385 global - Event time stamps are synchronize across
7388 counter - Simple counting of events (1, 2, ..)
7392 uptime - Use jiffies as the time stamp.
7393 perf - Use the same clock that perf uses.
7394 mono - Use ktime_get_mono_fast_ns() for time stamps.
7395 mono_raw - Use ktime_get_raw_fast_ns() for time
7397 boot - Use ktime_get_boot_fast_ns() for time stamps.
7401 trace_event=[event-list]
7403 to facilitate early boot debugging. The event-list is a
7404 comma-separated list of trace events to enable. See
7415 trace_instance=[instance-info]
7440 traceoff - Have the tracing instance tracing disabled after it is created.
7441 traceprintk - Have trace_printk() write into this trace instance
7488 trace_options=[option-list]
7490 The option-list is a comma delimited list of options
7504 trace_trigger=[trigger-list]
7550 See Documentation/admin-guide/mm/transhuge.rst
7557 See Documentation/admin-guide/mm/transhuge.rst
7564 See Documentation/admin-guide/mm/transhuge.rst
7572 - "tpm"
7573 - "tee"
7574 - "caam"
7575 - "dcp"
7585 - "kernel"
7586 - the same value as trusted.source: "tpm" or "tee"
7587 - "default"
7610 off - disable the mitigation
7611 on - enable the mitigation (default)
7612 user - mitigate only user/kernel transitions
7613 vm - mitigate only guest/host transitions
7621 high-resolution timer mode on older hardware, and in
7657 on - Enable TSX on the system. Although there are
7660 several previous speculation-related CVEs, and
7664 off - Disable TSX on the system. (Note that this
7672 auto - Disable TSX if X86_BUG_TAA is present,
7677 See Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
7683 Similar to Micro-architectural Data Sampling (MDS)
7698 full - Enable TAA mitigation on vulnerable CPUs
7701 full,nosmt - Enable TAA mitigation and disable SMT on
7704 vulnerable to cross-thread TAA attacks.
7705 off - Unconditionally disable TAA mitigation
7707 On MDS-affected machines, tsx_async_abort=off can be
7719 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
7725 See also Documentation/input/devices/joystick-parport.rst
7727 udbg-immortal [PPC] When debugging early kernel crashes that
7733 Set number of hash buckets for UDP/UDP-Lite connections
7735 uhci-hcd.ignore_oc=
7737 Some badly-designed motherboards generate lots of
7762 unwind_debug [X86-64,EARLY]
7770 (default -1 = authorized (same as 1),
7776 for newly-detected USB devices (default 2). This
7804 [USB] Specifies timeout for the initial 64-byte
7811 [USB] A list of quirk entries to augment the built-in
7814 VendorID:ProductID:Flags. The IDs are 4-digit hex
7816 will change the built-in quirk; setting it if it is
7821 a 255-byte read);
7825 Set-Interface requests);
7844 (bInterval-1).
7882 usb-storage.delay_use=
7889 usb-storage.quirks=
7891 override the built-in unusual_devs list. List
7894 and Product ID values (4-digit hex numbers) and
7896 to a common usb-storage quirk flag as follows:
7938 medium is write-protected).
7947 1 - undefined instruction events
7948 2 - system calls
7949 4 - invalid data aborts
7950 8 - SIGSEGV faults
7951 16 - SIGBUS faults
7960 vdso32= [X86] Control the 32-bit vDSO
7961 vdso32=1: enable 32-bit VDSO
7962 vdso32=0 or vdso32=2: disable 32-bit VDSO
7972 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
8003 vga= [BOOT,X86-32] Select a particular video mode
8005 Documentation/admin-guide/svga.rst.
8020 - Disable all of the above options
8044 vsyscall= [X86-64,EARLY]
8047 code). Most statically-linked binaries and older
8071 see vga-softcursor.rst. Default: 2 = underline.
8076 This is a 16-member array composed of values
8077 ranging from 0-255.
8082 This is a 16-member array composed of values
8083 ranging from 0-255.
8088 This is a 16-member array composed of values
8089 ranging from 0-255.
8094 Set system-wide default UTF-8 mode for all tty's.
8095 Default is 1, i.e. UTF-8 mode is enabled for all
8100 Format=<-1|0|1>
8101 Set system-wide default for whether a cursor
8102 is shown on new VTs. Default is -1,
8107 vt.italic= [VT] Default color for italic text; 0-15.
8110 vt.underline= [VT] Default color for underlined text; 0-15.
8114 see Documentation/watchdog/watchdog-parameters.rst
8115 or other driver-specific files in the
8129 Format: <cpu-list>
8150 Per-cpu work items which run for longer than this
8153 them from noticeably delaying other per-cpu work
8171 Per-cpu workqueues are generally preferred because
8173 locality; unfortunately, per-cpu workqueues tend to
8176 Enabling this makes the per-cpu workqueues which
8190 Documentation/core-api/workqueue.rst.
8203 forces round-robin CPU selection to flush out
8211 on - Enable writecombine, use WUC for ioremap_wc()
8212 off - Disable writecombine, use SUC for ioremap_wc()
8214 x2apic_phys [X86-64,APIC,EARLY] Use x2apic physical mode instead of
8218 xen_512gb_limit [KNL,X86-64,XEN]
8228 ide-disks -- unplug primary master IDE devices
8229 aux-ide-disks -- unplug non-primary-master IDE devices
8230 nics -- unplug network devices
8231 all -- unplug all emulated devices (NICs and IDE disks)
8232 unnecessary -- unplugging emulated devices is
8235 never -- do not unplug even if version check succeeds
8249 Select whether to always use non-faulting (safe) MSR
8269 xen_timer_slop= [X86-64,XEN,EARLY]
8294 preferred over the 2-level event handling, as it is
8311 xive.store-eoi=off [PPC]
8317 xhci-hcd.quirks [USB,KNL]