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. )
253 default "elf32-i386" if X86_32
254 default "elf64-x86-64" if X86_64
368 int
376 default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC)) if 64BIT
377 default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC))
380 the compiler produces broken code.
388 DMA memory allocation support allows devices with less than 32-bit
395 bool "Symmetric multi-processing support"
401 If you say N here, the kernel will run on uni- and multiprocessor
413 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
416 See also <file:Documentation/x86/i386/IO-APIC.rst>,
417 <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at
423 bool "Processor feature human-readable names" if EMBEDDED
439 This allows 32-bit apic IDs (so it can support very large systems),
485 bool "Support for extended (non-PC) x86 platforms"
493 for the following (non-PC) 32 bit x86 platforms:
496 RDC R-321x SoC
498 STA2X11-based (e.g. Northville)
502 generic distribution kernel, say Y here - otherwise say N.
507 bool "Support for extended (non-PC) x86 platforms"
515 for the following (non-PC) 64 bit x86 platforms:
521 generic distribution kernel, say Y here - otherwise say N.
534 Adds support for Numascale NumaChip large-SMP systems. Needed to
547 supposed to run on these EM64T-based machines. Only choose this option
636 things like clock tree (common clock framework) and pincontrol
647 I2C and UART depend on COMMON_CLK to set clock. GPIO driver is
661 - BayTrail
662 - Braswell
663 - Quark
681 bool "RDC R-321x SoC"
687 This option is needed for RDC R-321x system-on-chip, also known
688 as R-8610-(G).
692 bool "Support non-standard 32-bit SMP architectures"
707 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
708 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
719 This adds support for boards based on the STA2X11 IO-Hub,
740 prompt "Single-depth WCHAN output"
753 Say Y here to enable options for running Linux under various hyper-
774 bool "paravirt-ops debugging"
785 spinlock implementation with something virtualization-friendly
807 hypervisor. It includes a paravirtualized clock, so that instead
839 bool "Jailhouse non-root cell support"
843 This option allows to run Linux as guest in a Jailhouse non-root
853 a flexible, lightweight reference open-source hypervisor, built with
854 real-time and safety-criticality in mind. It is built for embedded
855 IOT with small footprint and real-time features. More details can be
866 Use the IA-PC HPET (High Precision Event Timer) to manage
870 The HPET provides a stable time base on SMP
872 as it is off-chip. The interface used is documented
892 The APBT provides a stable time base on SMP
894 as it is off-chip. APB timers are always running regardless of CPU
919 The GART supports full DMA access for devices with 32-bit access
928 32-bit limited device.
947 # The ranges are different on 32-bit and 64-bit kernels, depending on
955 int
961 int
968 int
975 int
982 int
989 int "Maximum number of CPUs" if SMP && !MAXSMP
1006 prompt "Multi-core scheduler support"
1009 Multi-core scheduler support improves the CPU scheduler's decision
1010 making when dealing with multi-core CPU chips at a cost of slightly
1044 integrated interrupt controller in the CPU. If you have a single-CPU
1048 all. The local APIC supports CPU-generated self-interrupts (timer,
1053 bool "IO-APIC support on uniprocessors"
1056 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
1057 SMP-capable replacement for PC-style interrupt controllers. Most
1060 If you have a single-CPU system with an IO-APIC, you can say Y here
1062 an IO-APIC, then the kernel will still run with no slowdown at all.
1075 bool "Reroute for broken boot IRQs"
1084 entry in the chipset's IO-APIC is masked (as, e.g. the RT
1094 Only affects "broken" chipsets. Interrupt sharing may be
1162 mode, which is an 80286-era approximation of 16-bit real mode.
1170 a 16-bit DOS program where 16-bit performance matters, vm86
1174 Note that any app that works on a 64-bit kernel is unlikely to
1175 need this option, as 64-bit kernels don't, and can't, support
1176 V8086 mode. This option is also unrelated to 16-bit protected
1177 mode and is not needed to run most 16-bit programs under Wine.
1189 bool "Enable support for 16-bit segments" if EXPERT
1193 This option is required by programs like Wine to run 16-bit
1196 plus 16K runtime memory on x86-64,
1264 dell-smm-hwmon driver. Character file /proc/i8k reports bios version,
1285 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
1309 need to add the vendor-supplied microcode to the CONFIG_EXTRA_FIRMWARE
1344 tristate "/dev/cpu/*/msr - Model-specific register support"
1347 Model-Specific Registers (MSRs). It is a character device with
1349 MSR accesses are directed to a specific CPU on multi-processor
1353 tristate "/dev/cpu/*/cpuid - CPU information support"
1369 However, the address space of 32-bit x86 processors is only 4
1388 PAE implements 3-level paging on IA32 processors. PAE is fully
1404 Select this if you have a 32-bit processor and between 1 and 4
1412 Select this if you have a 32-bit processor and more than 4
1431 will also likely make your kernel incompatible with binary-only
1471 larger swapspace support for non-overcommit purposes. It
1476 bool "Enable 5-level page tables support"
1482 5-level paging enables access to larger address space:
1489 support 4- or 5-level paging.
1491 See Documentation/x86/x86_64/5level-paging.rst for more
1546 Enable NUMA (Non-Uniform Memory Access) support.
1552 For 64-bit this is recommended if the system is Intel Core i7
1555 For 32-bit this is only needed if you boot a 32-bit
1556 kernel on a 64-bit NUMA platform.
1588 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
1620 See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
1636 tristate "Support non-standard NVDIMMs and ADR protected memory"
1643 Treat memory marked using the non-standard e820 type of 12 as used
1644 by the Intel Sandy Bridge-EP reference BIOS as protected memory.
1651 bool "Allocate 3rd-level pagetables from highmem"
1656 low memory. Setting this option will put user-space page table
1669 Documentation/admin-guide/kernel-parameters.rst to adjust this.
1677 BIOS-originated corruption always affects the same memory,
1690 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1734 is broken. Try "man bootparam" or see the documentation of your boot
1740 emulation can be found in <file:arch/x86/math-emu/README>.
1752 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1766 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1768 write-combining. All of these processors are supported by this code
1795 int "MTRR cleanup enable value (0-1)"
1803 int "MTRR cleanup spare reg num (0-7)"
1822 spontaneous reboots) or a non-working video driver.
1862 specific cases in protected and virtual-8086 modes. Emulated
1868 # Note: only available in 64-bit mode
1874 page-based protections, but without requiring modification of the
1877 For details, see Documentation/core-api/protection-keys.rst
1901 and =auto. See Documentation/admin-guide/kernel-parameters.txt for more
1911 TSX is disabled if possible - equals to tsx=off command line parameter.
1916 TSX is always enabled on TSX capable HW - equals the tsx=on command
1923 side channel attacks- equals the tsx=auto command line parameter.
1939 resultant kernel should continue to boot on existing non-EFI
1945 depends on $(cc-option,-mabi=ms) || X86_32
1951 See Documentation/admin-guide/efi-stub.rst for more information.
1954 bool "EFI mixed-mode support"
1957 Enabling this feature allows a 64-bit kernel to be booted
1958 on a 32-bit firmware, provided that your CPU supports 64-bit
1961 Note that it is not possible to boot a mixed-mode enabled
1962 kernel via the EFI boot stub - a bootloader that supports
2037 which are loaded in the main kernel with kexec-tools into
2043 For more details see Documentation/admin-guide/kdump/kdump.rst
2079 command line boot parameter passed to the panic-ed
2080 kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst
2122 On 64-bit, the kernel physical and virtual addresses are
2129 On 32-bit, the kernel physical and virtual addresses are
2160 If bootloader loads the kernel at a non-aligned address and
2164 If bootloader loads the kernel at a non-aligned address and
2172 On 32-bit this value must be a multiple of 0x2000. On 64-bit
2265 prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)"
2269 presented with a 32-bit vDSO that is not mapped at the address
2279 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
2282 option from 1 to 0, which turns off the 32-bit vDSO entirely.
2311 address mapping. This makes the mapping non-executable, but
2329 certain uses of the vsyscall area as an ASLR-bypassing
2344 bool "Built-in kernel command line"
2356 Systems with fully functional boot loaders (i.e. non-embedded)
2360 string "Built-in kernel command string"
2372 In most cases, the command line (whether built-in or provided
2377 bool "Built-in command line overrides boot loader arguments"
2381 command line, and use ONLY the built-in command line.
2383 This is used to work around broken boot loaders. This should
2390 Linux can allow user programs to install a per-process x86
2392 call. This is required to run 16-bit or segmented code such as
2397 context switches and increases the low-level kernel attack
2407 def_bool $(cc-option,-mharden-sls=all)
2410 def_bool $(cc-option,-mfunction-return=thunk-extern)
2440 kernel-to-user data leaks by avoiding speculative indirect
2441 branches. Requires a compiler with -mindirect-branch=thunk-extern
2445 bool "Enable return-thunks"
2449 Compile the kernel with the return-thunks compiler option to guard
2450 against kernel-to-user data leaks by avoiding return speculation.
2451 Requires a compiler with -mfunction-return=thunk-extern
2478 bool "Mitigate Straight-Line-Speculation"
2482 Compile the kernel with straight-line-speculation options to guard
2540 battery status information, and user-space programs will receive
2550 and more information, read <file:Documentation/power/apm-acpi.rst>
2551 and the Battery Powered Linux mini-HOWTO, available from
2556 VESA-compliant "green" monitors.
2574 2) pass the "no-hlt" option to the kernel
2608 feature is turned off -- see "Do CPU IDLE calls", below). This
2623 a slowed CPU clock rate, when the machine is idle. These idle calls
2637 do with your VESA-compliant power-saving monitor. Further, this
2638 option doesn't work for all laptops -- it might not turn off your
2648 needs to. Unfortunately, some BIOSes do not -- especially those in
2673 PCI-based systems don't have any BIOS at all. Linux can also try to
2694 bool "OLPC XO-1"
2706 # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
2749 architectures -- if your target machine is modern, it probably does
2754 # x86_64 have no ISA slots, but can have ISA-style DMA.
2756 bool "ISA-style DMA support" if (X86_64 && EXPERT)
2759 Enables ISA-style DMA support for devices requiring such controllers.
2778 PCI-IDs of several on-chip devices, so its a good dependency
2784 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
2788 This driver provides a clocksource built upon the on-chip
2789 27MHz high-resolution timer. Its also a workaround for
2790 NSC Geode SC-1100's buggy TSC, which loses time when the
2807 bool "OLPC XO-1 Power Management"
2810 Add support for poweroff and suspend of the OLPC XO-1 laptop.
2813 bool "OLPC XO-1 Real Time Clock"
2816 Add support for the XO-1 real time clock, which can be used as a
2820 bool "OLPC XO-1 SCI extras"
2825 Add support for SCI-based features of the OLPC XO-1 laptop:
2826 - EC-driven system wakeups
2827 - Power button
2828 - Ebook switch
2829 - Lid switch
2830 - AC adapter status updates
2831 - Battery status updates
2834 bool "OLPC XO-1.5 SCI extras"
2838 Add support for SCI-based features of the OLPC XO-1.5 laptop:
2839 - EC-driven system wakeups
2840 - AC adapter status updates
2841 - Battery status updates
2871 bool "Technologic Systems TS-5500 platform support"
2877 This option enables system support for the Technologic Systems TS-5500.
2889 bootloader or kernel can show basic video-output during boot for
2890 user-guidance and debugging. Historically, x86 used the VESA BIOS
2891 Extensions and EFI-framebuffers for this, which are mostly limited
2894 framebuffers so the new generic system-framebuffer drivers can be
2924 Include code to run legacy 32-bit programs under a
2925 64-bit kernel. You should likely turn this on, unless you're
2926 100% sure that you don't have any 32-bit programs left.
2931 depends on BROKEN
2936 bool "x32 ABI for 64-bit mode"
2939 Include code to run binaries for the x32 native 32-bit ABI
2940 for 64-bit processors. An x32 process gets access to the
2941 full 64-bit register file and wide data path while leaving