Lines Matching +full:multi +full:- +full:ported
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:
27 # Options that are inherently 64-bit kernel only:
54 # ported to 32-bit as well. )
141 # Word-size accesses may read uninitialized data past the trailing \0
315 default "elf32-i386" if X86_32
316 default "elf64-x86-64" if X86_64
414 …default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC) $(CLANG_FLAGS)) if 64…
415 default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC) $(CLANG_FLAGS))
419 the segment on 32-bit kernels.
424 bool "Symmetric multi-processing support"
430 If you say N here, the kernel will run on uni- and multiprocessor
445 See also <file:Documentation/arch/x86/i386/IO-APIC.rst>,
446 <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at
457 This allows 32-bit apic IDs (so it can support very large systems),
508 bool "Support for extended (non-PC) x86 platforms"
516 for the following (non-PC) 32 bit x86 platforms:
519 RDC R-321x SoC
521 STA2X11-based (e.g. Northville)
525 generic distribution kernel, say Y here - otherwise say N.
530 bool "Support for extended (non-PC) x86 platforms"
538 for the following (non-PC) 64 bit x86 platforms:
544 generic distribution kernel, say Y here - otherwise say N.
557 Adds support for Numascale NumaChip large-SMP systems. Needed to
570 supposed to run on these EM64T-based machines. Only choose this option
681 - BayTrail
682 - Braswell
683 - Quark
701 bool "RDC R-321x SoC"
707 This option is needed for RDC R-321x system-on-chip, also known
708 as R-8610-(G).
712 bool "Support non-standard 32-bit SMP architectures"
727 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
728 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
739 This adds support for boards based on the STA2X11 IO-Hub,
760 prompt "Single-depth WCHAN output"
773 Say Y here to enable options for running Linux under various hyper-
795 bool "paravirt-ops debugging"
806 spinlock implementation with something virtualization-friendly
860 bool "Jailhouse non-root cell support"
864 This option allows to run Linux as guest in a Jailhouse non-root
874 a flexible, lightweight reference open-source hypervisor, built with
875 real-time and safety-criticality in mind. It is built for embedded
876 IOT with small footprint and real-time features. More details can be
880 bool "Intel TDX (Trust Domain Extensions) - Guest Support"
905 Use the IA-PC HPET (High Precision Event Timer) to manage
911 as it is off-chip. The interface used is documented
946 The GART supports full DMA access for devices with 32-bit access
955 32-bit limited device.
980 # The ranges are different on 32-bit and 64-bit kernels, depending on
1042 by sharing mid-level caches, last-level cache tags or internal
1050 prompt "Multi-core scheduler support"
1053 Multi-core scheduler support improves the CPU scheduler's decision
1054 making when dealing with multi-core CPU chips at a cost of slightly
1088 integrated interrupt controller in the CPU. If you have a single-CPU
1092 all. The local APIC supports CPU-generated self-interrupts (timer,
1097 bool "IO-APIC support on uniprocessors"
1100 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
1101 SMP-capable replacement for PC-style interrupt controllers. Most
1104 If you have a single-CPU system with an IO-APIC, you can say Y here
1106 an IO-APIC, then the kernel will still run with no slowdown at all.
1127 entry in the chipset's IO-APIC is masked (as, e.g. the RT
1201 mode, which is an 80286-era approximation of 16-bit real mode.
1209 a 16-bit DOS program where 16-bit performance matters, vm86
1213 Note that any app that works on a 64-bit kernel is unlikely to
1214 need this option, as 64-bit kernels don't, and can't, support
1215 V8086 mode. This option is also unrelated to 16-bit protected
1216 mode and is not needed to run most 16-bit programs under Wine.
1228 bool "Enable support for 16-bit segments" if EXPERT
1232 This option is required by programs like Wine to run 16-bit
1235 plus 16K runtime memory on x86-64,
1308 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
1356 tristate "/dev/cpu/*/msr - Model-specific register support"
1359 Model-Specific Registers (MSRs). It is a character device with
1361 MSR accesses are directed to a specific CPU on multi-processor
1365 tristate "/dev/cpu/*/cpuid - CPU information support"
1381 However, the address space of 32-bit x86 processors is only 4
1400 PAE implements 3-level paging on IA32 processors. PAE is fully
1416 Select this if you have a 32-bit processor and between 1 and 4
1424 Select this if you have a 32-bit processor and more than 4
1443 will also likely make your kernel incompatible with binary-only
1483 larger swapspace support for non-overcommit purposes. It
1488 bool "Enable 5-level page tables support"
1494 5-level paging enables access to larger address space:
1501 support 4- or 5-level paging.
1503 See Documentation/arch/x86/x86_64/5level-paging.rst for more
1553 Enable NUMA (Non-Uniform Memory Access) support.
1559 For 64-bit this is recommended if the system is Intel Core i7
1562 For 32-bit this is only needed if you boot a 32-bit
1563 kernel on a 64-bit NUMA platform.
1573 you have a multi processor AMD system. This uses an old method to
1627 See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
1643 tristate "Support non-standard NVDIMMs and ADR protected memory"
1650 Treat memory marked using the non-standard e820 type of 12 as used
1651 by the Intel Sandy Bridge-EP reference BIOS as protected memory.
1658 bool "Allocate 3rd-level pagetables from highmem"
1663 low memory. Setting this option will put user-space page table
1676 Documentation/admin-guide/kernel-parameters.rst to adjust this.
1684 BIOS-originated corruption always affects the same memory,
1718 emulation can be found in <file:arch/x86/math-emu/README>.
1730 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1744 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1746 write-combining. All of these processors are supported by this code
1773 int "MTRR cleanup enable value (0-1)"
1781 int "MTRR cleanup spare reg num (0-7)"
1800 spontaneous reboots) or a non-working video driver.
1820 specific cases in protected and virtual-8086 modes. Emulated
1827 # https://github.com/llvm/llvm-project/commit/e0b89df2e0f0130881bf6c39bf31d7f6aac00e0f
1828 # https://github.com/llvm/llvm-project/commit/dfcf69770bc522b9e411c66454934a37c1f35332
1829 def_bool ((CC_IS_GCC && $(cc-option, -fcf-protection=branch -mindirect-branch-register)) || \
1831 $(as-instr,endbr64)
1842 # https://github.com/llvm/llvm-project/commit/9d7001eba9c4cb311e03cd8cdc231f9e579f2d0f
1848 hardware support course-grain forward-edge Control Flow Integrity
1863 # Note: only available in 64-bit mode
1869 page-based protections, but without requiring modification of the
1872 For details, see Documentation/core-api/protection-keys.rst
1896 and =auto. See Documentation/admin-guide/kernel-parameters.txt for more
1906 TSX is disabled if possible - equals to tsx=off command line parameter.
1911 TSX is always enabled on TSX capable HW - equals the tsx=on command
1918 side channel attacks- equals the tsx=auto command line parameter.
1972 resultant kernel should continue to boot on existing non-EFI
1983 See Documentation/admin-guide/efi-stub.rst for more information.
2003 bool "EFI mixed-mode support"
2006 Enabling this feature allows a 64-bit kernel to be booted
2007 on a 32-bit firmware, provided that your CPU supports 64-bit
2010 Note that it is not possible to boot a mixed-mode enabled
2011 kernel via the EFI boot stub - a bootloader that supports
2033 Ranges can be set up to this value using comma-separated list.
2040 Export EFI runtime memory regions to /sys/firmware/efi/runtime-map.
2044 See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
2107 command line boot parameter passed to the panic-ed
2108 kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst
2150 On 64-bit, the kernel physical and virtual addresses are
2157 On 32-bit, the kernel physical and virtual addresses are
2188 If bootloader loads the kernel at a non-aligned address and
2192 If bootloader loads the kernel at a non-aligned address and
2200 On 32-bit this value must be a multiple of 0x2000. On 64-bit
2250 to 64-bit linear addresses, allowing software to use of the
2262 prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)"
2266 presented with a 32-bit vDSO that is not mapped at the address
2276 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
2279 option from 1 to 0, which turns off the 32-bit vDSO entirely.
2314 certain uses of the vsyscall area as an ASLR-bypassing
2329 bool "Built-in kernel command line"
2341 Systems with fully functional boot loaders (i.e. non-embedded)
2345 string "Built-in kernel command string"
2357 In most cases, the command line (whether built-in or provided
2362 bool "Built-in command line overrides boot loader arguments"
2366 command line, and use ONLY the built-in command line.
2375 Linux can allow user programs to install a per-process x86
2377 call. This is required to run 16-bit or segmented code such as
2382 context switches and increases the low-level kernel attack
2408 def_bool $(cc-option,-mharden-sls=all)
2411 def_bool $(cc-option,-mfunction-return=thunk-extern)
2414 def_bool $(cc-option,-fpatchable-function-entry=16,16)
2424 # Basically: FUNCTION_ALIGNMENT - 5*CFI_CLANG
2486 kernel-to-user data leaks by avoiding speculative indirect
2487 branches. Requires a compiler with -mindirect-branch=thunk-extern
2491 bool "Enable return-thunks"
2496 Compile the kernel with the return-thunks compiler option to guard
2497 against kernel-to-user data leaks by avoiding return speculation.
2498 Requires a compiler with -mfunction-return=thunk-extern
2516 SKL Return-Speculation-Buffer (RSB) underflow issue. The
2519 non-affected systems the overhead of this option is marginal as
2520 the call depth tracking is using run-time generated call thunks
2535 kernel command line with 'debug-callthunks'.
2545 spec_rstack_overflow={ibpb,ibpb-vmexit} mitigations.
2561 Enable the SRSO mitigation needed on AMD Zen1-4 machines.
2564 bool "Mitigate Straight-Line-Speculation"
2569 Compile the kernel with straight-line-speculation options to guard
2601 See also <file:Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst>
2604 bool "Mitigate Spectre-BHB (Branch History Injection)"
2611 See <file:Documentation/admin-guide/hw-vuln/spectre.rst>
2622 See <file:Documentation/admin-guide/hw-vuln/indirect-target-selection.rst>
2652 battery status information, and user-space programs will receive
2662 and more information, read <file:Documentation/power/apm-acpi.rst>
2663 and the Battery Powered Linux mini-HOWTO, available from
2668 VESA-compliant "green" monitors.
2720 feature is turned off -- see "Do CPU IDLE calls", below). This
2749 do with your VESA-compliant power-saving monitor. Further, this
2750 option doesn't work for all laptops -- it might not turn off your
2760 needs to. Unfortunately, some BIOSes do not -- especially those in
2784 PCI-based systems don't have any BIOS at all. Linux can also try to
2805 bool "OLPC XO-1"
2817 # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
2859 architectures -- if your target machine is modern, it probably does
2864 # x86_64 have no ISA slots, but can have ISA-style DMA.
2866 bool "ISA-style DMA support" if (X86_64 && EXPERT)
2869 Enables ISA-style DMA support for devices requiring such controllers.
2888 PCI-IDs of several on-chip devices, so its a good dependency
2894 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
2898 This driver provides a clocksource built upon the on-chip
2899 27MHz high-resolution timer. Its also a workaround for
2900 NSC Geode SC-1100's buggy TSC, which loses time when the
2917 bool "OLPC XO-1 Power Management"
2920 Add support for poweroff and suspend of the OLPC XO-1 laptop.
2923 bool "OLPC XO-1 Real Time Clock"
2926 Add support for the XO-1 real time clock, which can be used as a
2930 bool "OLPC XO-1 SCI extras"
2935 Add support for SCI-based features of the OLPC XO-1 laptop:
2936 - EC-driven system wakeups
2937 - Power button
2938 - Ebook switch
2939 - Lid switch
2940 - AC adapter status updates
2941 - Battery status updates
2944 bool "OLPC XO-1.5 SCI extras"
2948 Add support for SCI-based features of the OLPC XO-1.5 laptop:
2949 - EC-driven system wakeups
2950 - AC adapter status updates
2951 - Battery status updates
2981 bool "Technologic Systems TS-5500 platform support"
2987 This option enables system support for the Technologic Systems TS-5500.
3006 Include code to run legacy 32-bit programs under a
3007 64-bit kernel. You should likely turn this on, unless you're
3008 100% sure that you don't have any 32-bit programs left.
3011 bool "x32 ABI for 64-bit mode"
3013 # llvm-objcopy does not convert x86_64 .note.gnu.property or
3017 depends on $(success,$(OBJCOPY) --version | head -n1 | grep -qv llvm)
3019 Include code to run binaries for the x32 native 32-bit ABI
3020 for 64-bit processors. An x32 process gets access to the
3021 full 64-bit register file and wide data path while leaving