Lines Matching +full:sci +full:- +full:pm +full:- +full:domain
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:
58 # ported to 32-bit as well. )
159 # Word-size accesses may read uninitialized data past the trailing \0
340 default "elf32-i386" if X86_32
341 default "elf64-x86-64" if X86_64
435 bool "Symmetric multi-processing support"
441 If you say N here, the kernel will run on uni- and multiprocessor
456 See also <file:Documentation/arch/x86/i386/IO-APIC.rst>,
457 <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at
487 bool "Enable MSI and MSI-x delivery by posted interrupts"
538 bool "Support for extended (non-PC) x86 platforms"
546 for the following non-PC x86 platforms, depending on the value of
549 32-bit platforms (CONFIG_64BIT=n):
553 RDC R-321x SoC
555 64-bit platforms (CONFIG_64BIT=y):
563 generic distribution kernel, say Y here - otherwise say N.
576 Adds support for Numascale NumaChip large-SMP systems. Needed to
589 supposed to run on these EM64T-based machines. Only choose this option
616 Select to build a kernel capable of supporting 64-bit Intel MID
625 If you are building for a PC class system or non-MID tablet
675 bool "RDC R-321x SoC"
681 This option is needed for RDC R-321x system-on-chip, also known
682 as R-8610-(G).
719 - BayTrail
720 - Braswell
721 - Quark
742 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
743 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
762 prompt "Single-depth WCHAN output"
775 Say Y here to enable options for running Linux under various hyper-
798 bool "paravirt-ops debugging"
809 spinlock implementation with something virtualization-friendly
863 bool "Jailhouse non-root cell support"
867 This option allows to run Linux as guest in a Jailhouse non-root
877 a flexible, lightweight reference open-source hypervisor, built with
878 real-time and safety-criticality in mind. It is built for embedded
879 IOT with small footprint and real-time features. More details can be
883 bool "Intel TDX (Trust Domain Extensions) - Guest Support"
908 Use the IA-PC HPET (High Precision Event Timer) to manage
914 as it is off-chip. The interface used is documented
948 The GART supports full DMA access for devices with 32-bit access
957 32-bit limited device.
982 # 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
1089 integrated interrupt controller in the CPU. If you have a single-CPU
1093 all. The local APIC supports CPU-generated self-interrupts (timer,
1098 bool "IO-APIC support on uniprocessors"
1101 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
1102 SMP-capable replacement for PC-style interrupt controllers. Most
1105 If you have a single-CPU system with an IO-APIC, you can say Y here
1107 an IO-APIC, then the kernel will still run with no slowdown at all.
1135 entry in the chipset's IO-APIC is masked (as, e.g. the RT
1209 mode, which is an 80286-era approximation of 16-bit real mode.
1217 a 16-bit DOS program where 16-bit performance matters, vm86
1221 Note that any app that works on a 64-bit kernel is unlikely to
1222 need this option, as 64-bit kernels don't, and can't, support
1223 V8086 mode. This option is also unrelated to 16-bit protected
1224 mode and is not needed to run most 16-bit programs under Wine.
1236 bool "Enable support for 16-bit segments" if EXPERT
1240 This option is required by programs like Wine to run 16-bit
1243 plus 16K runtime memory on x86-64,
1316 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
1364 tristate "/dev/cpu/*/msr - Model-specific register support"
1367 Model-Specific Registers (MSRs). It is a character device with
1369 MSR accesses are directed to a specific CPU on multi-processor
1373 tristate "/dev/cpu/*/cpuid - CPU information support"
1385 However, the address space of 32-bit x86 processors is only 4
1418 will also likely make your kernel incompatible with binary-only
1456 larger swapspace support for non-overcommit purposes. It
1506 Enable NUMA (Non-Uniform Memory Access) support.
1512 For 64-bit this is recommended if the system is Intel Core i7
1569 See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
1585 tristate "Support non-standard NVDIMMs and ADR protected memory"
1592 Treat memory marked using the non-standard e820 type of 12 as used
1593 by the Intel Sandy Bridge-EP reference BIOS as protected memory.
1609 Documentation/admin-guide/kernel-parameters.rst to adjust this.
1617 BIOS-originated corruption always affects the same memory,
1651 emulation can be found in <file:arch/x86/math-emu/README>.
1663 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1677 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1679 write-combining. All of these processors are supported by this code
1706 int "MTRR cleanup enable value (0-1)"
1714 int "MTRR cleanup spare reg num (0-7)"
1734 spontaneous reboots) or a non-working video driver.
1750 specific cases in protected and virtual-8086 modes. Emulated
1757 # https://github.com/llvm/llvm-project/commit/e0b89df2e0f0130881bf6c39bf31d7f6aac00e0f
1758 # https://github.com/llvm/llvm-project/commit/dfcf69770bc522b9e411c66454934a37c1f35332
1759 def_bool ((CC_IS_GCC && $(cc-option, -fcf-protection=branch -mindirect-branch-register)) || \
1761 $(as-instr,endbr64)
1772 # https://github.com/llvm/llvm-project/commit/9d7001eba9c4cb311e03cd8cdc231f9e579f2d0f
1778 hardware support course-grain forward-edge Control Flow Integrity
1793 # Note: only available in 64-bit mode
1799 page-based protections, but without requiring modification of the
1802 For details, see Documentation/core-api/protection-keys.rst
1830 and =auto. See Documentation/admin-guide/kernel-parameters.txt for more
1840 TSX is disabled if possible - equals to tsx=off command line parameter.
1845 TSX is always enabled on TSX capable HW - equals the tsx=on command
1852 side channel attacks- equals the tsx=auto command line parameter.
1892 bool "Intel Trust Domain Extensions (TDX) host support"
1902 Intel Trust Domain Extensions (TDX) protects guest VMs from malicious
1923 resultant kernel should continue to boot on existing non-EFI
1934 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
1971 Export EFI runtime memory regions to /sys/firmware/efi/runtime-map.
1975 See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map.
2047 command line boot parameter passed to the panic-ed
2048 kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst
2090 On 64-bit, the kernel physical and virtual addresses are
2097 On 32-bit, the kernel physical and virtual addresses are
2129 If bootloader loads the kernel at a non-aligned address and
2133 If bootloader loads the kernel at a non-aligned address and
2141 On 32-bit this value must be a multiple of 0x2000. On 64-bit
2184 to 64-bit linear addresses, allowing software to use of the
2200 presented with a 32-bit vDSO that is not mapped at the address
2210 dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed!
2213 option from 1 to 0, which turns off the 32-bit vDSO entirely.
2248 certain uses of the vsyscall area as an ASLR-bypassing
2263 bool "Built-in kernel command line"
2275 Systems with fully functional boot loaders (i.e. non-embedded)
2279 string "Built-in kernel command string"
2291 In most cases, the command line (whether built-in or provided
2296 bool "Built-in command line overrides boot loader arguments"
2300 command line, and use ONLY the built-in command line.
2309 Linux can allow user programs to install a per-process x86
2311 call. This is required to run 16-bit or segmented code such as
2316 context switches and increases the low-level kernel attack
2360 def_bool $(success,echo 'int __seg_fs fs; int __seg_gs gs;' | $(CC) -x c - -S -o /dev/null)
2364 # -fsanitize=kernel-address (KASAN) and -fsanitize=thread (KCSAN)
2379 def_bool $(cc-option,-mharden-sls=all)
2382 def_bool $(cc-option,-mfunction-return=thunk-extern)
2385 def_bool $(cc-option,-fpatchable-function-entry=16,16)
2388 def_bool $(cc-option,-fsanitize=kcfi -fsanitize-kcfi-arity)
2399 # Basically: FUNCTION_ALIGNMENT - 5*CFI_CLANG
2465 kernel-to-user data leaks by avoiding speculative indirect
2466 branches. Requires a compiler with -mindirect-branch=thunk-extern
2470 bool "Enable return-thunks"
2475 Compile the kernel with the return-thunks compiler option to guard
2476 against kernel-to-user data leaks by avoiding return speculation.
2477 Requires a compiler with -mfunction-return=thunk-extern
2495 SKL Return-Stack-Buffer (RSB) underflow issue. The mitigation is off
2497 retbleed=stuff option. For non-affected systems the overhead of this
2498 option is marginal as the call depth tracking is using run-time
2513 kernel command line with 'debug-callthunks'.
2523 spec_rstack_overflow={ibpb,ibpb-vmexit} mitigations.
2539 Enable the SRSO mitigation needed on AMD Zen1-4 machines.
2542 bool "Mitigate Straight-Line-Speculation"
2547 Compile the kernel with straight-line-speculation options to guard
2570 See also <file:Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst>
2573 bool "Mitigate Spectre-BHB (Branch History Injection)"
2580 See <file:Documentation/admin-guide/hw-vuln/spectre.rst>
2590 See also <file:Documentation/admin-guide/hw-vuln/mds.rst>
2601 See also <file:Documentation/admin-guide/hw-vuln/tsx_async_abort.rst>
2609 Stale Data Vulnerabilities are a class of memory-mapped I/O (MMIO)
2613 <file:Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst>
2623 See <file:Documentation/admin-guide/hw-vuln/l1tf.rst
2646 See also <file:Documentation/admin-guide/hw-vuln/spectre.rst>
2658 See also <file:Documentation/admin-guide/hw-vuln/spectre.rst>
2672 <file:Documentation/admin-guide/hw-vuln/special-register-buffer-data-sampling.rst>
2693 See <file:Documentation/admin-guide/hw-vuln/indirect-target-selection.rst>
2732 battery status information, and user-space programs will receive
2742 and more information, read <file:Documentation/power/apm-acpi.rst>
2743 and the Battery Powered Linux mini-HOWTO, available from
2748 VESA-compliant "green" monitors.
2793 bool "Enable PM at boot time"
2800 feature is turned off -- see "Do CPU IDLE calls", below). This
2829 do with your VESA-compliant power-saving monitor. Further, this
2830 option doesn't work for all laptops -- it might not turn off your
2840 needs to. Unfortunately, some BIOSes do not -- especially those in
2864 PCI-based systems don't have any BIOS at all. Linux can also try to
2885 bool "OLPC XO-1"
2897 # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
2946 lspci -nn | grep '1166:0009'
2960 architectures -- if your target machine is modern, it probably does
2965 # x86_64 have no ISA slots, but can have ISA-style DMA.
2967 bool "ISA-style DMA support" if (X86_64 && EXPERT)
2970 Enables ISA-style DMA support for devices requiring such controllers.
2989 PCI-IDs of several on-chip devices, so its a good dependency
2995 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
2999 This driver provides a clocksource built upon the on-chip
3000 27MHz high-resolution timer. Its also a workaround for
3001 NSC Geode SC-1100's buggy TSC, which loses time when the
3018 bool "OLPC XO-1 Power Management"
3021 Add support for poweroff and suspend of the OLPC XO-1 laptop.
3024 bool "OLPC XO-1 Real Time Clock"
3027 Add support for the XO-1 real time clock, which can be used as a
3031 bool "OLPC XO-1 SCI extras"
3036 Add support for SCI-based features of the OLPC XO-1 laptop:
3037 - EC-driven system wakeups
3038 - Power button
3039 - Ebook switch
3040 - Lid switch
3041 - AC adapter status updates
3042 - Battery status updates
3045 bool "OLPC XO-1.5 SCI extras"
3049 Add support for SCI-based features of the OLPC XO-1.5 laptop:
3050 - EC-driven system wakeups
3051 - AC adapter status updates
3052 - Battery status updates
3088 bool "Technologic Systems TS-5500 platform support"
3094 This option enables system support for the Technologic Systems TS-5500.
3117 Include code to run legacy 32-bit programs under a
3118 64-bit kernel. You should likely turn this on, unless you're
3119 100% sure that you don't have any 32-bit programs left.
3126 Make IA32 emulation disabled by default. This prevents loading 32-bit
3127 processes and access to 32-bit syscalls. If unsure, leave it to its
3131 bool "x32 ABI for 64-bit mode"
3133 # llvm-objcopy does not convert x86_64 .note.gnu.property or
3137 depends on $(success,$(OBJCOPY) --version | head -n1 | grep -qv llvm)
3139 Include code to run binaries for the x32 native 32-bit ABI
3140 for 64-bit processors. An x32 process gets access to the
3141 full 64-bit register file and wide data path while leaving