Lines Matching +full:0 +full:x86
12 acpi= [HW,ACPI,X86,ARM64,RISCV64,EARLY]
36 1,0: use 1st APIC table
37 default: 0
77 acpi.debug_layer=0x20000000
80 acpi.debug_layer=0xffffffff acpi.debug_level=0x2
82 acpi.debug_layer=0x2 acpi.debug_level=0xffffffff
106 By default, this is disabled due to x86 early mapping
230 acpi_pm_good [X86]
277 add_efi_memmap [EFI,X86,EARLY] Include EFI memory map in
291 behaviour to be specified. Bit 0 enables warnings,
294 align_va_addr= [X86-64]
325 amd_iommu= [HW,X86-64]
348 amd_iommu_dump= [HW,X86-64]
354 amd_iommu_intr= [HW,X86-64]
363 amd_pstate= [X86,EARLY]
376 to bias toward performance (0x0) or energy efficiency (0xff)
387 [X86]
408 apic= [APIC,X86,EARLY] Advanced Programmable Interrupt Controller
413 For X86-32, this can also be used to specify an APIC
418 apic_extnmi= [APIC,X86,EARLY] External NMI delivery setting
420 bsp: External NMI is delivered only to CPU 0
422 backup of CPU 0
431 See header of arch/x86/kernel/apm_32.c.
434 Format: { "0" | "1" }
436 0 -- disable.
480 Format: <bool> (0 = real, 1 = synthetic (default))
486 Format: { "0" | "1" | "off" | "on" }
487 0 | off - kernel audit is disabled and can not be
498 Format: <int> (must be >=0)
502 behavior is to disable the BAU (i.e. bau=0).
503 Format: { "0" | "1" }
504 0 - Disable the BAU.
540 bgrt_disable [ACPI,X86,EARLY]
573 cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
591 algorithm. Accepted values range from 0 to 7
635 Format: { "0" | "1" }
637 0 -- check protection applied by kernel (includes
648 clearcpuid=X[,X...] [X86]
650 arch/x86/include/asm/cpufeatures.h for the valid bit
678 clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
695 [X86-32] pit,hpet,tsc;
702 [X86-64] hpet,tsc
733 memory allocations. A value of 0 disables CMA
740 contiguous memory allocations. A value of 0 disables
742 specified, the default value is 0.
785 Format: y|n|Y|N|1|0
835 uart[8250],0x<addr>[,options]
875 seconds. A value of 0 disables the blank timer.
876 Defaults to 0.
887 0: default value, disable debugging
909 [X86,EARLY] Delay for N microsec between assert and de-assert
934 [KNL, X86-64, ARM64, RISCV, LoongArch] Select a region
947 [KNL, X86-64, ARM64, RISCV, LoongArch] range could be
955 [KNL, X86-64, ARM64, RISCV, LoongArch] range under 4G.
964 --> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB)
970 0: to disable low allocation.
1015 Bitmask for the various LOCKTYPE_ tests. Defaults to 0
1065 debugpat [X86] Enable PAT debugging
1083 of 0 will timeout at the end of initcalls. If the time
1153 disable_mtrr_cleanup [X86,EARLY]
1158 disable_mtrr_trim [X86, Intel and AMD only,EARLY]
1164 disable_timer_pin_1 [X86,EARLY]
1168 dis_ucode_ldr [X86] Disable the microcode loader.
1188 [X86] Controls mitigation for Register File Data
1237 dump_apple_properties [X86]
1239 x86 Macs. Useful for driver authors to determine
1271 uart[8250],0x<addr>[,options]
1379 coherent non-x86 systems that use system memory for
1389 earlyprintk= [X86,SH,ARM,M68k,S390,UM,EARLY]
1394 earlyprintk=serial[,0x...[,baudrate]]
1413 on some architectures (x86 and arm at least) by
1415 earlyprintk=serial,0x1008,115200
1468 efi_no_storage_paranoia [EFI,X86,EARLY]
1474 efivar_ssdt= [EFI; X86] Name of an EFI variable that contains an SSDT
1484 ekgdboc= [X86,KGDB,EARLY] Allow early kernel console debugging
1495 elanfreq= [X86-32]
1497 arch/x86/kernel/cpu/cpufreq/elanfreq.c.
1499 elfcorehdr=[size[KMG]@]offset[KMG] [PPC,SH,X86,S390,EARLY]
1505 enable_mtrr_cleanup [X86,EARLY]
1510 enable_timer_pin_1 [X86]
1517 Format: {"0" | "1"}
1519 0 -- permissive (log only, no denials).
1521 Default value is 0.
1562 forcepae [X86-32]
1569 fred= [X86-64]
1650 in the tracefs tracing directory. default: 0 (no limit)
1697 gart_fix_e820= [X86-64,EARLY] disable the fix e820 for K8 GART
1702 [X86,INTEL,EARLY] Control the Gather Data Sampling (GDS)
1727 goldfish [X86] Enable the goldfish android emulator platform.
1742 grcan.enable0= [HW] Configuration of physical interface 0. Determines
1743 the "Enable 0" bit of the configuration register.
1744 Format: 0 | 1
1745 Default: 0
1747 the "Enable 0" bit of the configuration register.
1748 Format: 0 | 1
1749 Default: 0
1751 Format: 0 | 1
1752 Default: 0
1754 Format: <unsigned int> such that (txsize & ~0x1fffc0) == 0.
1757 Format: <unsigned int> such that (rxsize & ~0x1fffc0) == 0.
1774 Format: 0 | 1
1779 Format: 0 | 1 (for off | on)
1833 hpet= [X86-32,HPET] option to control HPET usage
1841 hpet_mmap= [X86, HPET_MMAP] Allow userspace to mmap HPET
1897 Format: 0 | 1
1906 terminal devices. Valid values: 0..8
1911 hv_nopvspin [X86,HYPER_V,EARLY]
1922 i2c_touchscreen_props= [HW,ACPI,X86]
1926 submit a drivers/platform/x86/touchscreen_dmi.c patch
1965 Format: { 1 | Y | y | 0 | N | n }
1967 0, N, n: don't ever reset controller
1968 Default: only on s2r transitions on x86; most other
1980 brightness value of 0 indicates backlight switched off,
1982 to maximum brightness. If this parameter is set to 0
1984 is set to 1, a brightness value of 0 sets the backlight
1988 0 -- machine default
1991 ia32_emulation= [X86-64]
2001 idle= [X86,EARLY]
2020 for the device. By default it is set to false (0).
2080 owned by uid=0.
2101 mode bit set by either the effective uid (euid=0) or
2102 uid=0.
2123 opened for read by uid=0.
2184 Default is 0, 0
2188 Format: 0 | 1
2192 Format: 0 | 1
2195 init_pkru= [X86] Specify the default memory protection keys rights
2196 register contents for all processes. 0x55555554 by
2197 default (disallow access to all but pkey 0). Can
2203 int_pln_enable [X86] Enable power limit notification interrupt
2206 Format: { "0" | "1" }
2207 0 -- basic integrity auditing messages. (Default)
2243 intel_idle.max_cstate= [KNL,HW,ACPI,X86]
2244 0 disables intel_idle and fall back on acpi_idle.
2247 intel_pstate= [X86,EARLY]
2291 intremap= [X86-64,Intel-IOMMU,EARLY]
2305 iommu= [X86,EARLY]
2315 pt [X86]
2316 nopt [X86]
2320 iommu.forcedac= [ARM64,X86,EARLY] Control IOVA allocation for PCI devices.
2321 Format: { "0" | "1" }
2322 0 - Try to allocate a 32-bit DMA address first, before
2328 iommu.strict= [ARM64,X86,S390,EARLY] Configure TLB invalidation behaviour
2329 Format: { "0" | "1" }
2330 0 - Lazy mode.
2340 Note: on x86, strict mode specified via one of the
2344 [ARM64,X86,EARLY] Configure DMA to bypass the IOMMU by default.
2345 Format: { "0" | "1" }
2346 0 - Use IOMMU translation for DMA.
2354 io_delay= [X86,EARLY] I/O delay method
2355 0x80
2356 Standard port 0x80 based delay
2357 0xed
2358 Alternate port 0xed based delay (needed on some systems)
2372 Determine whether IPE starts in permissive (0) or
2380 is 0.
2451 <cpu number> begins at 0 and the maximum value is
2482 ivrs_ioapic [HW,X86-64]
2485 By default, PCI segment is 0, and can be omitted.
2488 PCI segment 0x1 and PCI device 00:14.0,
2496 * To map IOAPIC-ID decimal 10 to PCI segment 0x1 and
2500 ivrs_hpet [HW,X86-64]
2503 By default, PCI segment is 0, and can be omitted.
2506 PCI segment 0x1 and PCI device 00:14.0,
2511 * To map HPET-ID decimal 0 to PCI device 00:14.0
2513 ivrs_hpet[0]=00:14.0
2514 * To map HPET-ID decimal 10 to PCI segment 0x1 and
2518 ivrs_acpihid [HW,X86-64]
2521 By default, PCI segment is 0, and can be omitted.
2523 For example, to map UART-HID:UID AMD0020:0 to
2524 PCI segment 0x1 and PCI device ID 00:14.5,
2526 ivrs_acpihid=AMD0020:0@0001:00:14.5
2529 * To map UART-HID:UID AMD0020:0 to PCI segment is 0,
2531 ivrs_acpihid[00:14.5]=AMD0020:0
2532 * To map UART-HID:UID AMD0020:0 to PCI segment 0x1 and
2534 ivrs_acpihid[0001:00:14.5]=AMD0020:0
2553 kernelcore= [KNL,X86,PPC,EARLY]
2643 0: force disabled
2653 Default is 0 (don't ignore, but inject #GP)
2656 [KVM,X86] Controls whether or not KVM will try to
2680 kvm.enable_virt_at_load=[KVM,ARM64,LOONGARCH,MIPS,RISCV,X86]
2687 VMs, i.e. on the 0=>1 and 1=>0 transitions of the
2691 latency for creation of the 0=>1 VM, as KVM serializes
2715 back to huge pages. 0 disables the recovery, otherwise if
2723 If the value is 0 (the default), KVM will pick a period based
2756 [KVM,ARM,EARLY] Trap guest accesses to GICv3 group-0
2842 l1d_flush= [X86,INTEL,EARLY]
2859 l1tf= [X86,EARLY] Control mitigation of the L1TF vulnerability on
2928 lapic [X86-32,APIC,EARLY] Enable the local APIC even if BIOS
2931 lapic= [X86,APIC] Do not use TSC deadline
2936 lapic_timer_c2_ok [X86,APIC,EARLY] trust the local apic timer
2940 libata.dma=0 Disable all PATA and SATA DMA
2948 libata.ignore_hpa=0 keep BIOS limits (default)
2966 number of 0 either selects the first device or the
2981 * Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
3086 in progress at any given time. Defaults to 0,
3092 to 100 milliseconds. Select 0 to disable.
3118 boosting. Select 0 to disable, 1 to boost
3173 0 (KERN_EMERG) system is unusable
3197 lp=0 [LP] Specify parallel ports to use, e.g,
3199 lp=reset first parallel port). 'lp=0' disables the
3217 CPU). 0 enables autodetection (default). To determine
3239 will bring up during bootup. maxcpus=n : n >= 0 limits
3244 While n=0 is a special case, it is equivalent to "nosmp",
3254 mce [X86-32] Machine Check Exception
3256 mce=option [X86-64] See Documentation/arch/x86/x86_64/boot-options.rst
3265 mds= [X86,INTEL,EARLY]
3298 Must be specified, otherwise memory size will be 0.
3316 [X86] Work as limiting max address. Use together
3333 mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
3350 memmap=exactmap [KNL,X86,EARLY] Enable setting of an exact
3357 [KNL, X86,MIPS,XTENSA,EARLY] Force usage of a specific region of memory.
3373 Example: Exclude memory from 0x18690000-0x1869ffff
3374 memmap=64K$0x18690000
3376 memmap=0x10000$0x18690000
3382 [KNL,X86] Mark specific memory as protected.
3384 The memory region may be marked as e820 type 12 (0xc)
3396 memory_corruption_check=0/1 [X86,EARLY]
3408 memory_corruption_check_size=size [X86,EARLY]
3414 memory_corruption_check_period=seconds [X86,EARLY]
3417 other rate. 0 disables periodic checking.
3420 [KNL,X86,ARM] Boolean flag to enable this feature.
3438 memtest= [KNL,X86,ARM,M68K,PPC,RISCV,EARLY] Enable memtest
3440 default : 0 <disable>
3448 mem_encrypt= [X86-64] AMD Secure Memory Encryption (SME) control
3454 Refer to Documentation/virt/kvm/x86/amd-memory-encryption.rst
3463 mfgptfix [X86-32] Fix MFGPT timers on AMD Geode platforms when
3470 microcode.force_minrev= [X86]
3476 Format:[0..2][b][c][t]
3477 Default: "0tb"
3479 0 - The attached screen is the 3.5" TFT
3497 [X86,PPC,S390,ARM64,EARLY] Control optional mitigations for
3509 Equivalent to: if nokaslr then kpti=0 [ARM64]
3510 gather_data_sampling=off [X86]
3511 kvm.nx_huge_pages=off [X86]
3512 l1tf=off [X86]
3513 mds=off [X86]
3514 mmio_stale_data=off [X86]
3517 nobp=0 [S390]
3518 nopti [X86,PPC]
3520 nospectre_v1 [X86,PPC]
3521 nospectre_v2 [X86,PPC,S390,ARM64]
3522 reg_file_data_sampling=off [X86]
3523 retbleed=off [X86]
3524 spec_rstack_overflow=off [X86]
3525 spec_store_bypass_disable=off [X86,PPC]
3526 spectre_bhi=off [X86]
3527 spectre_v2_user=off [X86]
3528 srbds=off [X86,INTEL]
3530 tsx_async_abort=off [X86]
3549 Equivalent to: l1tf=flush,nosmt [X86]
3550 mds=full,nosmt [X86]
3551 tsx_async_abort=full,nosmt [X86]
3552 mmio_stale_data=full,nosmt [X86]
3553 retbleed=auto,nosmt [X86]
3559 of 0 disables mminit logging and a level of 4 will
3564 [X86,INTEL,EARLY] Control mitigation for the Processor
3639 movablecore= [KNL,X86,PPC,EARLY]
3669 mtrr=debug [X86,EARLY]
3673 mtrr_chunk_size=nn[KMG,X86,EARLY]
3677 mtrr_gran_size=nn[KMG,X86,EARLY]
3683 mtrr_spare_reg_nr=n [X86,EARLY]
3685 Range: 0,7 : spare reg number
3710 0 to disable accounting
3712 Default value is 0.
3736 and the specified value is >= 0.
3775 To turn off this behaviour, set the value to '0'.
3792 The default parameter value of '0' causes the kernel
3807 Setting this to value to 0 causes the kernel to use
3849 nmi_watchdog= [KNL,BUGS=X86] Debugging features for SMP kernels
3851 Valid num: 0 or 1
3852 0 - turn hardlockup detector in nmi_watchdog off
3854 rNNN - configure the watchdog with raw perf event 0xNNN
3867 no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
3874 no5lvl [X86-64,RISCV,EARLY] Disable 5-level paging mode. Forces
3910 noexec32 [X86-64]
3923 nofsgsbase [X86] Disables FSGSBASE instructions.
3925 nofxsr [BUGS=X86-32] Disables x86 floating point extended
3955 nohugeiomap [KNL,X86,PPC,ARM64,EARLY] Disable kernel huge I/O mappings.
3957 nohugevmalloc [KNL,X86,PPC,ARM64,EARLY] Disable kernel huge vmalloc mappings.
3979 nointremap [X86-64,Intel-IOMMU,EARLY] Do not enable interrupt
3983 noinvpcid [X86,EARLY] Disable the INVPCID cpu feature.
3987 noirqdebug [X86-32] Disables the code which attempts to detect and
3997 no-kvmapf [X86,KVM,EARLY] Disable paravirtualized asynchronous page
4000 no-kvmclock [X86,KVM,EARLY] Disable paravirtualized KVM clock driver
4002 nolapic [X86-32,APIC,EARLY] Do not enable or use the local APIC.
4004 nolapic_timer [X86-32,APIC,EARLY] Do not use the local APIC timer.
4006 nomce [X86-32] Disable Machine Check Exception
4008 nomfgpt [X86-32] Disable Multi-Function General Purpose
4023 nonmi_ipi [X86] Disable using NMI IPIs during panic/reboot to
4027 nopat [X86,EARLY] Disable PAT (page attribute table extension of
4030 nopcid [X86-64,EARLY] Disable the PCID cpu feature.
4032 nopku [X86] Disable Memory Protection Keys CPU feature found
4035 nopti [X86-64,EARLY]
4038 nopv= [X86,XEN,KVM,HYPER_V,VMWARE,EARLY]
4043 nopvspin [X86,XEN,KVM,EARLY]
4049 echo 0 > /proc/sys/kernel/randomize_va_space
4051 noreplace-smp [X86-32,SMP] Don't replace SMP instructions
4061 nosgx [X86-64,SGX,EARLY] Disables Intel SGX kernel support.
4072 and disable the IO APIC. legacy for "maxcpus=0".
4077 [KNL,X86,PPC] Disable symmetric multithreading (SMT).
4091 nospectre_v1 [X86,PPC,EARLY] Disable mitigations for Spectre Variant 1
4095 nospectre_v2 [X86,PPC_E500,ARM64,EARLY] Disable all mitigations
4100 no-steal-acc [X86,PV_OPS,ARM64,PPC/PSERIES,RISCV,LOONGARCH,EARLY]
4106 no_timer_check [X86,APIC] Disables the code which tests for
4124 [X86,PV_OPS,EARLY] Disable paravirtualized VMware
4132 nox2apic [X86-64,APIC,EARLY] Do not enable x2APIC mode.
4138 noxsave [BUGS=X86] Disables x86 extended register state save
4142 noxsaveopt [X86] Disables xsaveopt used in saving x86 extended
4149 noxsaves [X86] Disables xsaves and xrstors used in saving and
4150 restoring x86 extended register state in compacted
4168 numa=off [KNL, ARM64, PPC, RISCV, SPARC, X86, EARLY]
4173 [KNL, ARM64, RISCV, X86, EARLY]
4178 [KNL, ARM64, RISCV, X86, EARLY]
4183 [KNL, ARM64, RISCV, X86, EARLY]
4187 numa_balancing= [KNL,ARM64,PPC,RISCV,S390,X86] Enable or disable automatic
4210 omap_mux=i2c2_scl.i2c2_scl=0x100,i2c2_sda.i2c2_sda=0x100
4220 1 indicates lock status, 0 indicates unlock status.
4256 timeout > 0: seconds before rebooting
4257 timeout = 0: wait forever
4258 timeout < 0: reboot immediately
4280 bit 0: print all tasks info
4294 connected to, default is 0.
4297 0 for XT, 1 for AT (default is AT).
4300 parport= [HW,PPT] Specify parallel ports. 0 disables.
4301 Format: { 0 | auto | 0xBBB[,IRQ[,DMA]] }
4348 for the respective channel. Bit 0 is for the first
4373 Bit 0 is for mode 0, bit 1 is for mode 1, and so on.
4385 options up to 6 legacy ports are supported: 0x1f0,
4386 0x170, 0x1e8, 0x168, 0x1e0, 0x160, however probing
4388 corresponding bits in the mask to 1. Bit 0 is for
4389 the first port in the list above (0x1f0), and so on.
4395 set to 1 if CONFIG_PATA_QDI_MODULE, 0 otherwise.
4400 the standard I/O port (0x130) if 1, otherwise the
4401 value given is the I/O port to use (typically 0x1b0).
4403 0 otherwise.
4408 the use of the respective PIO modes. Bit 0 is for
4409 mode 0, bit 1 is for mode 1, and so on. Mode 0 only
4445 off [X86] don't probe for the PCI bus
4446 bios [X86-32] force use of PCI BIOS, don't access
4449 nobios [X86-32] disallow use of PCI BIOS, only direct
4453 conf1 [X86] Force use of PCI Configuration Access
4454 Mechanism 1 (config address in IO port 0xCF8,
4455 data in IO port 0xCFC, both 32-bit).
4456 conf2 [X86] Force use of PCI Configuration Access
4457 Mechanism 2 (IO port 0xCF8 is an 8-bit port for
4458 the function, IO port 0xCFA, also 8-bit, sets
4460 through ports 0xC000-0xCFFF).
4468 nommconf [X86] Disable use of MMCONFIG for PCI
4470 check_enable_amd_mmconf [X86] check for and enable
4487 biosirq [X86-32] Use PCI BIOS calls to get the interrupt
4495 rom [X86] Assign address space to expansion ROMs.
4499 norom [X86] Do not assign address space to
4502 nobar [X86] Do not assign address space to the
4504 irqmask=0xMMMM [X86] Set a bit mask of IRQs allowed to be
4508 pirqaddr=0xAAAAA [X86] Specify the physical address
4512 lastbus=N [X86] Scan all buses thru bus #N. Can be
4516 assign-busses [X86] Always assign all PCI bus
4519 usepirqmask [X86] Honor the possible IRQ mask stored
4525 noacpi [X86] Do not use ACPI for IRQ routing
4527 use_crs [X86] Use PCI host bridge window information
4531 nocrs [X86] Ignore PCI host bridge windows from ACPI.
4533 use_e820 [X86] Use E820 reservations to exclude parts of
4538 no_e820 [X86] Ignore E820 reservations for PCI host
4546 skip_isa_align [X86] do not align io start addr, so can
4548 noearly [X86] Don't do any early type 1 scanning.
4656 bit-0 : ACS Source Validation
4664 '0' – force disabled
4718 Format: { 0 | 1 }
4730 See Documentation/arch/x86/i386/IO-APIC.rst.
4733 Format: { parport<nr> | timid | 0 }
4736 pmtmr= [X86] Manual setup of pmtmr I/O Port.
4738 e.g. pmtmr=0x508
4743 PMU counters by setting MMCR0 to 0 (the FC bit is
4746 remains 0.
4784 possible_cpus= [SMP,S390,X86]
4830 Format: <bool> (1/Y/y=enable, 0/N/n=disable)
4837 serial console, keeping this 0 is a good choice
4840 default: 0 (auto_verbose is enabled)
4850 Format: <bool> (1/Y/y=enable, 0/N/n=disable)
4898 (0 = never).
4903 0 = disabled, 1 = enabled (default).
4907 pti= [X86-64] Control Page Table Isolation of user and
4957 Format: <bool> (1/Y/y=enable, 0/N/n=disable)
4962 cec_disable [X86]
5072 RCU_BOOST is not set, valid values are 0-99 and
5118 of permitted values is in the range 0:100000.
5197 Specify rcutree.use_softirq=0 to use rcuc kthreads.
5220 Default is 0.
5485 Test RCU priority boosting? 0=no, 1=maybe, 2=yes.
5670 rdrand= [X86,EARLY]
5677 rdt= [HW,X86,RDT]
5685 Format (x86 or x86_64):
5716 x86 laptops.
5737 refscale is built into the kernel and to 0 (leave
5763 them. If <base> is less than 0x10000, the region
5788 reservetop= [X86-32,EARLY]
5817 retbleed= [X86] Control mitigation of RETBleed (Arbitrary
5855 0 "airplane mode". All wifi, bluetooth, wimax, gps, fm,
5860 0 The "airplane mode" button does nothing.
5940 and so on. As a special case a factor of 0 imposes no
5949 schedstats= [KNL,X86] Enable or disable scheduled statistics.
5968 Format: integer between 0 and 10
5969 Default is 0.
6066 Format: { "0" | "1" }
6067 0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
6077 Format: { "0" | "1" }
6079 0 -- disable.
6083 serialnumber [BUGS=X86-32]
6085 sev=option[,option...] [X86-64] See Documentation/arch/x86/x86_64/boot-options.rst
6090 show_lapic= [APIC,X86] Advanced Programmable Interrupt Controller
6180 0: Toshiba Satellite 1800 (GP data pin select)
6193 Format: 0 | 1
6204 Format: 0 | 1
6209 spectre_bhi= [X86] Control mitigation of Branch History Injection
6224 spectre_v2= [X86,EARLY] Control mitigation of Spectre variant 2
6263 [X86] Control mitigation of Spectre variant 2
6304 [X86,EARLY] Control RAS overflow mitigation on AMD Zen CPUs
6335 On x86 the options are:
6353 X86: "prctl"
6367 [X86] Enable split lock detection or bus lock detection
6393 0 < N <= 1000.
6404 CPL > 0.
6406 srbds= [X86,INTEL,EARLY]
6440 0: Never.
6444 0x1X: Above plus if high contention.
6490 srcutree.convert_to_big must have the 0x10 bit
6548 [X86]
6571 range 0 < portnr < 1024).
6582 The default value is 0 (no limit).
6617 Format: { on | off | y | n | 1 | 0 }
6621 swiotlb= [ARM,PPC,MIPS,X86,S390,EARLY]
6688 0: no polling (default)
6742 (0). For more information about TPM hardware interfaces
6754 echo 0 > /proc/sys/kernel/tracepoint_printk
6841 If memory has been reserved (see memmap for x86), the instance
6844 memmap=12M$0x284500000 trace_instance=boot_map@0x284500000:12M
6847 memory at 0x284500000 that is 12Megs. The per CPU buffers of that
6967 [x86] reliable: mark tsc clocksource as reliable, this
6972 [x86] noirqtime: Do not use TSC to do irq accounting.
6976 [x86] unstable: mark the TSC clocksource as unstable, this
6979 [x86] nowatchdog: disable clocksource watchdog. Used
6983 [x86] recalibrate: force recalibration against a HW timer
6985 obtained from HW or FW using either an MSR or CPUID(0x15).
6987 [x86] watchdog: Use TSC as the watchdog clocksource with
6994 tsc_early_khz= [X86,EARLY] Skip early TSC calibration and use the given
7000 tsx= [X86] Control Transactional Synchronization
7029 tsx_async_abort= [X86,INTEL,EARLY] Control mitigation for the TSX Async
7093 [X86] Cause panic on unknown NMI.
7095 unwind_debug [X86-64,EARLY]
7104 0 = not authorized, 1 = authorized, 2 = authorized
7115 [USB] Set to log all usbfs traffic (default 0 = off).
7122 [USB] Set to cycle leds on hubs (default 0 = off).
7126 scheme (default 0 = off).
7130 usbfs (default = 16, 0 = max = 2047).
7204 Example: quirks=0781:5580:bk,0a5c:5834:gij
7288 [X86,EARLY] Flags controlling user PTE allocations.
7294 vdso= [X86,SH,SPARC]
7298 vdso=0: disable VDSO mapping
7300 vdso32= [X86] Control the 32-bit vDSO
7302 vdso32=0 or vdso32=2: disable 32-bit VDSO
7306 vdso32=0; otherwise, the default is vdso32=1.
7309 alias for vdso32=0.
7311 Try vdso32=0 if you encounter an error that says:
7318 Format: [0|1]
7322 the allocated input device. If set to 0, video driver
7339 virtio_mmio.device=1K@0x100b0000:48:7
7343 vga= [BOOT,X86-32] Select a particular video mode
7344 See Documentation/arch/x86/boot.rst and
7364 the minimum size (128MB on x86, arm32 platforms).
7384 vsyscall= [X86-64,EARLY]
7386 fixed addresses of 0xffffffffff600x00 from legacy
7405 Format: 0xYX, X = foreground, Y = background.
7406 Default: 0x07 = light gray on black.
7409 Format: 0xCCBBAA, where AA, BB, and CC are the same as
7417 ranging from 0-255.
7423 ranging from 0-255.
7429 ranging from 0-255.
7433 Format=<0|1>
7440 Format=<-1|0|1>
7444 overridden by individual drivers. 0 will hide
7447 vt.italic= [VT] Default color for italic text; 0-15.
7450 vt.underline= [VT] Default color for underlined text; 0-15.
7462 threshold is set to twice the value. A value of 0
7476 help debugging. 0 disables workqueue stall
7487 The default is 0, which disables the panic on stall.
7508 The default is 4 times. 0 disables the warning.
7554 x2apic_phys [X86-64,APIC,EARLY] Use x2apic physical mode instead of
7558 xen_512gb_limit [KNL,X86-64,XEN]
7565 xen_emul_unplug= [HW,X86,XEN,EARLY]
7577 xen_legacy_crash [X86,XEN,EARLY]
7581 xen_mc_debug [X86,XEN,EARLY]
7587 xen_msr_safe= [X86,XEN,EARLY]
7593 xen_nopv [X86]
7600 [KNL,X86,XEN,EARLY] Disable the vector callback for Xen
7609 xen_timer_slop= [X86-64,XEN,EARLY]