| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration" |
| 3 | |
| 4 | source "arch/um/Kconfig.common" |
| 5 | |
| 6 | menu "UML-specific options" |
| 7 | |
| 8 | menu "Host processor type and features" |
| 9 | |
| 10 | source "arch/x86/Kconfig.cpu" |
| 11 | |
| 12 | endmenu |
| 13 | |
| 14 | config UML_X86 |
| 15 | def_bool y |
| 16 | select GENERIC_FIND_FIRST_BIT |
| 17 | |
| 18 | config 64BIT |
| 19 | bool "64-bit kernel" if SUBARCH = "x86" |
| 20 | default SUBARCH != "i386" |
| 21 | |
| 22 | config X86_32 |
| 23 | def_bool !64BIT |
| 24 | select HAVE_AOUT |
| 25 | select ARCH_WANT_IPC_PARSE_VERSION |
| 26 | select MODULES_USE_ELF_REL |
| 27 | select CLONE_BACKWARDS |
| 28 | select OLD_SIGSUSPEND3 |
| 29 | select OLD_SIGACTION |
| 30 | |
| 31 | config X86_64 |
| 32 | def_bool 64BIT |
| 33 | select MODULES_USE_ELF_RELA |
| 34 | |
| 35 | config ARCH_DEFCONFIG |
| 36 | string |
| 37 | default "arch/um/configs/i386_defconfig" if X86_32 |
| 38 | default "arch/um/configs/x86_64_defconfig" if X86_64 |
| 39 | |
| 40 | config RWSEM_XCHGADD_ALGORITHM |
| 41 | def_bool 64BIT |
| 42 | |
| 43 | config RWSEM_GENERIC_SPINLOCK |
| 44 | def_bool !RWSEM_XCHGADD_ALGORITHM |
| 45 | |
| 46 | config 3_LEVEL_PGTABLES |
| 47 | bool "Three-level pagetables" if !64BIT |
| 48 | default 64BIT |
| 49 | help |
| 50 | Three-level pagetables will let UML have more than 4G of physical |
| 51 | memory. All the memory that can't be mapped directly will be treated |
| 52 | as high memory. |
| 53 | |
| 54 | However, this it experimental on 32-bit architectures, so if unsure say |
| 55 | N (on x86-64 it's automatically enabled, instead, as it's safe there). |
| 56 | |
| 57 | config ARCH_HAS_SC_SIGNALS |
| 58 | def_bool !64BIT |
| 59 | |
| 60 | config ARCH_REUSE_HOST_VSYSCALL_AREA |
| 61 | def_bool !64BIT |
| 62 | |
| 63 | config GENERIC_HWEIGHT |
| 64 | def_bool y |
| 65 | |
| 66 | source "arch/um/Kconfig.um" |
| 67 | |
| 68 | endmenu |
| 69 | |
| 70 | source "arch/um/Kconfig.rest" |