Lines Matching +full:int +full:- +full:clock +full:- +full:stable +full:- +full:broken
1 # SPDX-License-Identifier: GPL-2.0
4 bool "64-bit kernel" if "$(ARCH)" = "x86"
7 Say yes to build a 64-bit kernel - formerly known as x86_64
8 Say no to build a 32-bit kernel - formerly known as i386
13 # Options that are inherently 32-bit kernel only:
26 # Options that are inherently 64-bit kernel only:
50 # ported to 32-bit as well. )
254 default "elf32-i386" if X86_32
255 default "elf64-x86-64" if X86_64
369 int
377 default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC)) if 64BIT
378 default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC))
381 the compiler produces broken code.
389 DMA memory allocation support allows devices with less than 32-bit
396 bool "Symmetric multi-processing support"
402 If you say N here, the kernel will run on uni- and multiprocessor
414 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
417 See also <file:Documentation/x86/i386/IO-APIC.rst>,
418 <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at
424 bool "Processor feature human-readable names" if EMBEDDED
440 This allows 32-bit apic IDs (so it can support very large systems),
486 bool "Support for extended (non-PC) x86 platforms"
494 for the following (non-PC) 32 bit x86 platforms:
497 RDC R-321x SoC
499 STA2X11-based (e.g. Northville)
503 generic distribution kernel, say Y here - otherwise say N.
508 bool "Support for extended (non-PC) x86 platforms"
516 for the following (non-PC) 64 bit x86 platforms:
522 generic distribution kernel, say Y here - otherwise say N.
535 Adds support for Numascale NumaChip large-SMP systems. Needed to
548 supposed to run on these EM64T-based machines. Only choose this option
637 things like clock tree (common clock framework) and pincontrol
648 I2C and UART depend on COMMON_CLK to set clock. GPIO driver is
662 - BayTrail
663 - Braswell
664 - Quark
682 bool "RDC R-321x SoC"
688 This option is needed for RDC R-321x system-on-chip, also known
689 as R-8610-(G).
693 bool "Support non-standard 32-bit SMP architectures"
708 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
709 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
720 This adds support for boards based on the STA2X11 IO-Hub,
741 prompt "Single-depth WCHAN output"
754 Say Y here to enable options for running Linux under various hyper-
775 bool "paravirt-ops debugging"
786 spinlock implementation with something virtualization-friendly
808 hypervisor. It includes a paravirtualized clock, so that instead
840 bool "Jailhouse non-root cell support"
844 This option allows to run Linux as guest in a Jailhouse non-root
854 a flexible, lightweight reference open-source hypervisor, built with
855 real-time and safety-criticality in mind. It is built for embedded
856 IOT with small footprint and real-time features. More details can be
867 Use the IA-PC HPET (High Precision Event Timer) to manage
871 The HPET provides a stable time base on SMP
873 as it is off-chip. The interface used is documented
893 The APBT provides a stable time base on SMP
895 as it is off-chip. APB timers are always running regardless of CPU
920 The GART supports full DMA access for devices with 32-bit access
929 32-bit limited device.
948 # The ranges are different on 32-bit and 64-bit kernels, depending on
956 int
962 int
969 int
976 int
983 int
990 int "Maximum number of CPUs" if SMP && !MAXSMP
1007 prompt "Multi-core scheduler support"
1010 Multi-core scheduler support improves the CPU scheduler's decision
1011 making when dealing with multi-core CPU chips at a cost of slightly
1045 integrated interrupt controller in the CPU. If you have a single-CPU
1049 all. The local APIC supports CPU-generated self-interrupts (timer,
1054 bool "IO-APIC support on uniprocessors"
1057 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
1058 SMP-capable replacement for PC-style interrupt controllers. Most
1061 If you have a single-CPU system with an IO-APIC, you can say Y here
1063 an IO-APIC, then the kernel will still run with no slowdown at all.
1076 bool "Reroute for broken boot IRQs"
1085 entry in the chipset's IO-APIC is masked (as, e.g. the RT
1095 Only affects "broken" chipsets. Interrupt sharing may be
1163 mode, which is an 80286-era approximation of 16-bit real mode.
1171 a 16-bit DOS program where 16-bit performance matters, vm86
1175 Note that any app that works on a 64-bit kernel is unlikely to
1176 need this option, as 64-bit kernels don't, and can't, support
1177 V8086 mode. This option is also unrelated to 16-bit protected
1178 mode and is not needed to run most 16-bit programs under Wine.
1190 bool "Enable support for 16-bit segments" if EXPERT
1194 This option is required by programs like Wine to run 16-bit
1197 plus 16K runtime memory on x86-64,
1266 dell-smm-hwmon driver. Character file /proc/i8k reports bios version,
1287 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
1311 need to add the vendor-supplied microcode to the CONFIG_EXTRA_FIRMWARE
1345 tristate "/dev/cpu/*/msr - Model-specific register support"
1348 Model-Specific Registers (MSRs). It is a character device with
1350 MSR accesses are directed to a specific CPU on multi-processor
1354 tristate "/dev/cpu/*/cpuid - CPU information support"
1370 However, the address space of 32-bit x86 processors is only 4
1389 PAE implements 3-level paging on IA32 processors. PAE is fully
1405 Select this if you have a 32-bit processor and between 1 and 4
1413 Select this if you have a 32-bit processor and more than 4
1432 will also likely make your kernel incompatible with binary-only
1472 larger swapspace support for non-overcommit purposes. It
1477 bool "Enable 5-level page tables support"
1483 5-level paging enables access to larger address space:
1490 support 4- or 5-level paging.
1492 See Documentation/x86/x86_64/5level-paging.rst for more
1548 Enable NUMA (Non-Uniform Memory Access) support.
1554 For 64-bit this is recommended if the system is Intel Core i7
1557 For 32-bit this is only needed if you boot a 32-bit
1558 kernel on a 64-bit NUMA platform.
1590 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
1622 See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
1638 tristate "Support non-standard NVDIMMs and ADR protected memory"
1645 Treat memory marked using the non-standard e820 type of 12 as used
1646 by the Intel Sandy Bridge-EP reference BIOS as protected memory.
1653 bool "Allocate 3rd-level pagetables from highmem"
1658 low memory. Setting this option will put user-space page table
1671 Documentation/admin-guide/kernel-parameters.rst to adjust this.
1679 BIOS-originated corruption always affects the same memory,
1692 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1736 is broken. Try "man bootparam" or see the documentation of your boot
1742 emulation can be found in <file:arch/x86/math-emu/README>.
1754 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1768 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1770 write-combining. All of these processors are supported by this code
1797 int "MTRR cleanup enable value (0-1)"
1805 int "MTRR cleanup spare reg num (0-7)"
1824 spontaneous reboots) or a non-working video driver.
1864 specific cases in protected and virtual-8086 modes. Emulated
1870 # Note: only available in 64-bit mode
1876 page-based protections, but without requiring modification of the
1879 For details, see Documentation/core-api/protection-keys.rst
1903 and =auto. See Documentation/admin-guide/kernel-parameters.txt for more
1913 TSX is disabled if possible - equals to tsx=off command line parameter.
1918 TSX is always enabled on TSX capable HW - equals the tsx=on command
1925 side channel attacks- equals the tsx=auto command line parameter.
1942 resultant kernel should continue to boot on existing non-EFI
1953 See Documentation/admin-guide/efi-stub.rst for more information.
1956 bool "EFI mixed-mode support"
1959 Enabling this feature allows a 64-bit kernel to be booted
1960 on a 32-bit firmware, provided that your CPU supports 64-bit
1963 Note that it is not possible to boot a mixed-mode enabled
1964 kernel via the EFI boot stub - a bootloader that supports
2039 which are loaded in the main kernel with kexec-tools into
2045 For more details see Documentation/admin-guide/kdump/kdump.rst
2081 command line boot parameter passed to the panic-ed
2082 kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst
2124 On 64-bit, the kernel physical and virtual addresses are
2131 On 32-bit, the kernel physical and virtual addresses are
2162 If bootloader loads the kernel at a non-aligned address and
2166 If bootloader loads the kernel at a non-aligned address and
2174 On 32-bit this value must be a multiple of 0x2000. On 64-bit
2267 prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)"
2271 presented with a 32-bit vDSO that is not mapped at the address
2281 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
2284 option from 1 to 0, which turns off the 32-bit vDSO entirely.
2313 address mapping. This makes the mapping non-executable, but
2331 certain uses of the vsyscall area as an ASLR-bypassing
2346 bool "Built-in kernel command line"
2358 Systems with fully functional boot loaders (i.e. non-embedded)
2362 string "Built-in kernel command string"
2374 In most cases, the command line (whether built-in or provided
2379 bool "Built-in command line overrides boot loader arguments"
2383 command line, and use ONLY the built-in command line.
2385 This is used to work around broken boot loaders. This should
2392 Linux can allow user programs to install a per-process x86
2394 call. This is required to run 16-bit or segmented code such as
2399 context switches and increases the low-level kernel attack
2409 def_bool $(cc-option,-mharden-sls=all)
2412 def_bool $(cc-option,-mfunction-return=thunk-extern)
2442 kernel-to-user data leaks by avoiding speculative indirect
2443 branches. Requires a compiler with -mindirect-branch=thunk-extern
2447 bool "Enable return-thunks"
2451 Compile the kernel with the return-thunks compiler option to guard
2452 against kernel-to-user data leaks by avoiding return speculation.
2453 Requires a compiler with -mfunction-return=thunk-extern
2484 Enable the SRSO mitigation needed on AMD Zen1-4 machines.
2487 bool "Mitigate Straight-Line-Speculation"
2491 Compile the kernel with straight-line-speculation options to guard
2523 See also <file:Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst>
2579 battery status information, and user-space programs will receive
2589 and more information, read <file:Documentation/power/apm-acpi.rst>
2590 and the Battery Powered Linux mini-HOWTO, available from
2595 VESA-compliant "green" monitors.
2613 2) pass the "no-hlt" option to the kernel
2647 feature is turned off -- see "Do CPU IDLE calls", below). This
2662 a slowed CPU clock rate, when the machine is idle. These idle calls
2676 do with your VESA-compliant power-saving monitor. Further, this
2677 option doesn't work for all laptops -- it might not turn off your
2687 needs to. Unfortunately, some BIOSes do not -- especially those in
2712 PCI-based systems don't have any BIOS at all. Linux can also try to
2733 bool "OLPC XO-1"
2745 # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
2788 architectures -- if your target machine is modern, it probably does
2793 # x86_64 have no ISA slots, but can have ISA-style DMA.
2795 bool "ISA-style DMA support" if (X86_64 && EXPERT)
2798 Enables ISA-style DMA support for devices requiring such controllers.
2817 PCI-IDs of several on-chip devices, so its a good dependency
2823 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
2827 This driver provides a clocksource built upon the on-chip
2828 27MHz high-resolution timer. Its also a workaround for
2829 NSC Geode SC-1100's buggy TSC, which loses time when the
2846 bool "OLPC XO-1 Power Management"
2849 Add support for poweroff and suspend of the OLPC XO-1 laptop.
2852 bool "OLPC XO-1 Real Time Clock"
2855 Add support for the XO-1 real time clock, which can be used as a
2859 bool "OLPC XO-1 SCI extras"
2864 Add support for SCI-based features of the OLPC XO-1 laptop:
2865 - EC-driven system wakeups
2866 - Power button
2867 - Ebook switch
2868 - Lid switch
2869 - AC adapter status updates
2870 - Battery status updates
2873 bool "OLPC XO-1.5 SCI extras"
2877 Add support for SCI-based features of the OLPC XO-1.5 laptop:
2878 - EC-driven system wakeups
2879 - AC adapter status updates
2880 - Battery status updates
2910 bool "Technologic Systems TS-5500 platform support"
2916 This option enables system support for the Technologic Systems TS-5500.
2928 bootloader or kernel can show basic video-output during boot for
2929 user-guidance and debugging. Historically, x86 used the VESA BIOS
2930 Extensions and EFI-framebuffers for this, which are mostly limited
2933 framebuffers so the new generic system-framebuffer drivers can be
2963 Include code to run legacy 32-bit programs under a
2964 64-bit kernel. You should likely turn this on, unless you're
2965 100% sure that you don't have any 32-bit programs left.
2970 depends on BROKEN
2975 bool "x32 ABI for 64-bit mode"
2977 # llvm-objcopy does not convert x86_64 .note.gnu.property or
2981 depends on $(success,$(OBJCOPY) --version | head -n1 | grep -qv llvm)
2983 Include code to run binaries for the x32 native 32-bit ABI
2984 for 64-bit processors. An x32 process gets access to the
2985 full 64-bit register file and wide data path while leaving