Sam Ravnborg | daa93fa | 2007-11-12 20:54:30 +0100 | [diff] [blame] | 1 | # Select 32 or 64 bit |
| 2 | config 64BIT |
Sam Ravnborg | 6840999 | 2007-11-17 15:37:31 +0100 | [diff] [blame] | 3 | bool "64-bit kernel" if ARCH = "x86" |
David Woodhouse | ffee0de | 2012-12-20 21:51:55 +0000 | [diff] [blame] | 4 | default ARCH != "i386" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 5 | ---help--- |
Sam Ravnborg | daa93fa | 2007-11-12 20:54:30 +0100 | [diff] [blame] | 6 | Say yes to build a 64-bit kernel - formerly known as x86_64 |
| 7 | Say no to build a 32-bit kernel - formerly known as i386 |
| 8 | |
| 9 | config X86_32 |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 10 | def_bool y |
| 11 | depends on !64BIT |
Sam Ravnborg | daa93fa | 2007-11-12 20:54:30 +0100 | [diff] [blame] | 12 | |
| 13 | config X86_64 |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 14 | def_bool y |
| 15 | depends on 64BIT |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 16 | |
| 17 | ### Arch settings |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 18 | config X86 |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 19 | def_bool y |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 20 | select ACPI_LEGACY_TABLES_LOOKUP if ACPI |
| 21 | select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI |
| 22 | select ANON_INODES |
| 23 | select ARCH_CLOCKSOURCE_DATA |
| 24 | select ARCH_DISCARD_MEMBLOCK |
| 25 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
Stephen Boyd | 446f24d | 2013-04-30 15:28:42 -0700 | [diff] [blame] | 26 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
Dan Williams | 21266be | 2015-11-19 18:19:29 -0800 | [diff] [blame] | 27 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 28 | select ARCH_HAS_ELF_RANDOMIZE |
Linus Torvalds | 72d9310 | 2014-09-13 11:14:53 -0700 | [diff] [blame] | 29 | select ARCH_HAS_FAST_MULTIPLIER |
Riku Voipio | 957e3fa | 2014-12-12 16:57:44 -0800 | [diff] [blame] | 30 | select ARCH_HAS_GCOV_PROFILE_ALL |
Dan Williams | 96601ad | 2015-08-24 18:29:38 -0400 | [diff] [blame] | 31 | select ARCH_HAS_PMEM_API if X86_64 |
Ross Zwisler | 67a3e8f | 2015-08-27 13:14:20 -0600 | [diff] [blame] | 32 | select ARCH_HAS_MMIO_FLUSH |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 33 | select ARCH_HAS_SG_CHAIN |
Andrey Ryabinin | c6d3085 | 2016-01-20 15:00:55 -0800 | [diff] [blame] | 34 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 35 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
| 36 | select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI |
Mark Salter | 77fbbc8 | 2013-10-07 22:18:07 -0400 | [diff] [blame] | 37 | select ARCH_MIGHT_HAVE_PC_PARPORT |
Mark Salter | 5e2c18c | 2014-01-01 11:34:16 -0800 | [diff] [blame] | 38 | select ARCH_MIGHT_HAVE_PC_SERIO |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 39 | select ARCH_SUPPORTS_ATOMIC_RMW |
Mel Gorman | 3b242c6 | 2015-06-30 14:57:13 -0700 | [diff] [blame] | 40 | select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 41 | select ARCH_SUPPORTS_INT128 if X86_64 |
| 42 | select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 |
| 43 | select ARCH_USE_BUILTIN_BSWAP |
| 44 | select ARCH_USE_CMPXCHG_LOCKREF if X86_64 |
| 45 | select ARCH_USE_QUEUED_RWLOCKS |
| 46 | select ARCH_USE_QUEUED_SPINLOCKS |
Mel Gorman | 72b252a | 2015-09-04 15:47:32 -0700 | [diff] [blame] | 47 | select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP |
Ingo Molnar | 5aaeb5c | 2015-07-17 12:28:12 +0200 | [diff] [blame] | 48 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
Ingo Molnar | da4276b | 2009-01-07 11:05:10 +0100 | [diff] [blame] | 49 | select ARCH_WANT_FRAME_POINTERS |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 50 | select ARCH_WANT_IPC_PARSE_VERSION if X86_32 |
| 51 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 52 | select BUILDTIME_EXTABLE_SORT |
| 53 | select CLKEVT_I8253 |
| 54 | select CLKSRC_I8253 if X86_32 |
| 55 | select CLOCKSOURCE_VALIDATE_LAST_CYCLE |
| 56 | select CLOCKSOURCE_WATCHDOG |
| 57 | select CLONE_BACKWARDS if X86_32 |
| 58 | select COMPAT_OLD_SIGACTION if IA32_EMULATION |
| 59 | select DCACHE_WORD_ACCESS |
Linus Torvalds | 45471cd | 2015-06-24 19:52:06 -0700 | [diff] [blame] | 60 | select EDAC_ATOMIC_SCRUB |
| 61 | select EDAC_SUPPORT |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 62 | select GENERIC_CLOCKEVENTS |
| 63 | select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) |
| 64 | select GENERIC_CLOCKEVENTS_MIN_ADJUST |
| 65 | select GENERIC_CMOS_UPDATE |
| 66 | select GENERIC_CPU_AUTOPROBE |
| 67 | select GENERIC_EARLY_IOREMAP |
| 68 | select GENERIC_FIND_FIRST_BIT |
| 69 | select GENERIC_IOMAP |
| 70 | select GENERIC_IRQ_PROBE |
| 71 | select GENERIC_IRQ_SHOW |
| 72 | select GENERIC_PENDING_IRQ if SMP |
| 73 | select GENERIC_SMP_IDLE_THREAD |
| 74 | select GENERIC_STRNCPY_FROM_USER |
| 75 | select GENERIC_STRNLEN_USER |
| 76 | select GENERIC_TIME_VSYSCALL |
| 77 | select HAVE_ACPI_APEI if ACPI |
| 78 | select HAVE_ACPI_APEI_NMI if ACPI |
| 79 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
| 80 | select HAVE_AOUT if X86_32 |
| 81 | select HAVE_ARCH_AUDITSYSCALL |
| 82 | select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE |
| 83 | select HAVE_ARCH_JUMP_LABEL |
| 84 | select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP |
| 85 | select HAVE_ARCH_KGDB |
| 86 | select HAVE_ARCH_KMEMCHECK |
Daniel Cashman | 9e08f57 | 2016-01-14 15:20:06 -0800 | [diff] [blame] | 87 | select HAVE_ARCH_MMAP_RND_BITS if MMU |
| 88 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 89 | select HAVE_ARCH_SECCOMP_FILTER |
| 90 | select HAVE_ARCH_SOFT_DIRTY if X86_64 |
| 91 | select HAVE_ARCH_TRACEHOOK |
| 92 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
| 93 | select HAVE_BPF_JIT if X86_64 |
| 94 | select HAVE_CC_STACKPROTECTOR |
| 95 | select HAVE_CMPXCHG_DOUBLE |
| 96 | select HAVE_CMPXCHG_LOCAL |
| 97 | select HAVE_CONTEXT_TRACKING if X86_64 |
Josh Triplett | c1bd55f | 2015-06-30 15:00:00 -0700 | [diff] [blame] | 98 | select HAVE_COPY_THREAD_TLS |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 99 | select HAVE_C_RECORDMCOUNT |
| 100 | select HAVE_DEBUG_KMEMLEAK |
| 101 | select HAVE_DEBUG_STACKOVERFLOW |
| 102 | select HAVE_DMA_API_DEBUG |
Akinobu Mita | 9c5a362 | 2014-06-04 16:06:50 -0700 | [diff] [blame] | 103 | select HAVE_DMA_CONTIGUOUS |
Steven Rostedt | 677aa9f | 2008-05-17 00:01:36 -0400 | [diff] [blame] | 104 | select HAVE_DYNAMIC_FTRACE |
Masami Hiramatsu | 06aeaae | 2012-09-28 17:15:17 +0900 | [diff] [blame] | 105 | select HAVE_DYNAMIC_FTRACE_WITH_REGS |
Johannes Berg | 58340a0 | 2008-07-25 01:45:33 -0700 | [diff] [blame] | 106 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 107 | select HAVE_FENTRY if X86_64 |
| 108 | select HAVE_FTRACE_MCOUNT_RECORD |
| 109 | select HAVE_FUNCTION_GRAPH_FP_TEST |
| 110 | select HAVE_FUNCTION_GRAPH_TRACER |
| 111 | select HAVE_FUNCTION_TRACER |
| 112 | select HAVE_GENERIC_DMA_COHERENT if X86_32 |
K.Prasad | 0067f12 | 2009-06-01 23:43:57 +0530 | [diff] [blame] | 113 | select HAVE_HW_BREAKPOINT |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 114 | select HAVE_IDE |
| 115 | select HAVE_IOREMAP_PROT |
| 116 | select HAVE_IRQ_EXIT_ON_IRQ_STACK if X86_64 |
| 117 | select HAVE_IRQ_TIME_ACCOUNTING |
| 118 | select HAVE_KERNEL_BZIP2 |
| 119 | select HAVE_KERNEL_GZIP |
| 120 | select HAVE_KERNEL_LZ4 |
| 121 | select HAVE_KERNEL_LZMA |
| 122 | select HAVE_KERNEL_LZO |
| 123 | select HAVE_KERNEL_XZ |
| 124 | select HAVE_KPROBES |
| 125 | select HAVE_KPROBES_ON_FTRACE |
| 126 | select HAVE_KRETPROBES |
| 127 | select HAVE_KVM |
| 128 | select HAVE_LIVEPATCH if X86_64 |
| 129 | select HAVE_MEMBLOCK |
| 130 | select HAVE_MEMBLOCK_NODE_MAP |
Frederic Weisbecker | 0102752 | 2010-04-11 18:55:56 +0200 | [diff] [blame] | 131 | select HAVE_MIXED_BREAKPOINTS_REGS |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 132 | select HAVE_OPROFILE |
| 133 | select HAVE_OPTPROBES |
| 134 | select HAVE_PCSPKR_PLATFORM |
| 135 | select HAVE_PERF_EVENTS |
Frederic Weisbecker | c01d432 | 2010-05-15 22:57:48 +0200 | [diff] [blame] | 136 | select HAVE_PERF_EVENTS_NMI |
Jiri Olsa | c5e6319 | 2012-08-07 15:20:36 +0200 | [diff] [blame] | 137 | select HAVE_PERF_REGS |
Jiri Olsa | c5ebced | 2012-08-07 15:20:40 +0200 | [diff] [blame] | 138 | select HAVE_PERF_USER_STACK_DUMP |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 139 | select HAVE_REGS_AND_STACK_ACCESS_API |
| 140 | select HAVE_SYSCALL_TRACEPOINTS |
Brian Gerst | 0c3619e | 2015-06-22 07:55:20 -0400 | [diff] [blame] | 141 | select HAVE_UID16 if X86_32 || IA32_EMULATION |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 142 | select HAVE_UNSTABLE_SCHED_CLOCK |
Avi Kivity | 7c68af6 | 2009-09-19 09:40:22 +0300 | [diff] [blame] | 143 | select HAVE_USER_RETURN_NOTIFIER |
Thomas Gleixner | c0185808 | 2011-02-07 02:24:08 +0100 | [diff] [blame] | 144 | select IRQ_FORCED_THREADING |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 145 | select MODULES_USE_ELF_RELA if X86_64 |
| 146 | select MODULES_USE_ELF_REL if X86_32 |
| 147 | select OLD_SIGACTION if X86_32 |
| 148 | select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION |
| 149 | select PERF_EVENTS |
Prarit Bhargava | 3195ef5 | 2013-02-14 12:02:54 -0500 | [diff] [blame] | 150 | select RTC_LIB |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 151 | select SPARSE_IRQ |
Pranith Kumar | 83fe27e | 2014-12-05 11:24:45 -0500 | [diff] [blame] | 152 | select SRCU |
Ingo Molnar | 6471b82 | 2015-06-03 10:00:13 +0200 | [diff] [blame] | 153 | select SYSCTL_EXCEPTION_TRACE |
| 154 | select USER_STACKTRACE_SUPPORT |
| 155 | select VIRT_TO_BUS |
| 156 | select X86_DEV_DMA_OPS if X86_64 |
| 157 | select X86_FEATURE_NAMES if PROC_FS |
Balbir Singh | 7d8330a | 2008-02-10 12:46:28 +0530 | [diff] [blame] | 158 | |
Ingo Molnar | ba7e4d1 | 2009-06-06 13:58:12 +0200 | [diff] [blame] | 159 | config INSTRUCTION_DECODER |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 160 | def_bool y |
| 161 | depends on KPROBES || PERF_EVENTS || UPROBES |
Ingo Molnar | ba7e4d1 | 2009-06-06 13:58:12 +0200 | [diff] [blame] | 162 | |
Peter Zijlstra | 7fb0f1d | 2014-10-24 09:12:35 +0200 | [diff] [blame] | 163 | config PERF_EVENTS_INTEL_UNCORE |
| 164 | def_bool y |
Peter Zijlstra (Intel) | ce5686d | 2014-10-29 11:17:04 +0100 | [diff] [blame] | 165 | depends on PERF_EVENTS && CPU_SUP_INTEL && PCI |
Peter Zijlstra | 7fb0f1d | 2014-10-24 09:12:35 +0200 | [diff] [blame] | 166 | |
Linus Torvalds | 51b26ad | 2009-04-26 10:12:47 -0700 | [diff] [blame] | 167 | config OUTPUT_FORMAT |
| 168 | string |
| 169 | default "elf32-i386" if X86_32 |
| 170 | default "elf64-x86-64" if X86_64 |
| 171 | |
Sam Ravnborg | 7353190 | 2008-05-25 23:03:18 +0200 | [diff] [blame] | 172 | config ARCH_DEFCONFIG |
Sam Ravnborg | b9b39bf | 2008-04-29 12:48:15 +0200 | [diff] [blame] | 173 | string |
Sam Ravnborg | 7353190 | 2008-05-25 23:03:18 +0200 | [diff] [blame] | 174 | default "arch/x86/configs/i386_defconfig" if X86_32 |
| 175 | default "arch/x86/configs/x86_64_defconfig" if X86_64 |
Sam Ravnborg | b9b39bf | 2008-04-29 12:48:15 +0200 | [diff] [blame] | 176 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 177 | config LOCKDEP_SUPPORT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 178 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 179 | |
| 180 | config STACKTRACE_SUPPORT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 181 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 182 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 183 | config MMU |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 184 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 185 | |
Daniel Cashman | 9e08f57 | 2016-01-14 15:20:06 -0800 | [diff] [blame] | 186 | config ARCH_MMAP_RND_BITS_MIN |
| 187 | default 28 if 64BIT |
| 188 | default 8 |
| 189 | |
| 190 | config ARCH_MMAP_RND_BITS_MAX |
| 191 | default 32 if 64BIT |
| 192 | default 16 |
| 193 | |
| 194 | config ARCH_MMAP_RND_COMPAT_BITS_MIN |
| 195 | default 8 |
| 196 | |
| 197 | config ARCH_MMAP_RND_COMPAT_BITS_MAX |
| 198 | default 16 |
| 199 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 200 | config SBUS |
| 201 | bool |
| 202 | |
FUJITA Tomonori | 3bc4e45 | 2010-03-10 15:23:22 -0800 | [diff] [blame] | 203 | config NEED_DMA_MAP_STATE |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 204 | def_bool y |
Konrad Rzeszutek Wilk | a6dfa12 | 2015-04-17 15:04:48 -0400 | [diff] [blame] | 205 | depends on X86_64 || INTEL_IOMMU || DMA_API_DEBUG || SWIOTLB |
FUJITA Tomonori | 3bc4e45 | 2010-03-10 15:23:22 -0800 | [diff] [blame] | 206 | |
FUJITA Tomonori | 18e9830 | 2010-05-26 14:44:32 -0700 | [diff] [blame] | 207 | config NEED_SG_DMA_LENGTH |
Andrew Morton | 4a14d84 | 2010-05-26 14:44:33 -0700 | [diff] [blame] | 208 | def_bool y |
FUJITA Tomonori | 18e9830 | 2010-05-26 14:44:32 -0700 | [diff] [blame] | 209 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 210 | config GENERIC_ISA_DMA |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 211 | def_bool y |
| 212 | depends on ISA_DMA_API |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 213 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 214 | config GENERIC_BUG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 215 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 216 | depends on BUG |
Jan Beulich | b93a531 | 2008-12-16 11:40:27 +0000 | [diff] [blame] | 217 | select GENERIC_BUG_RELATIVE_POINTERS if X86_64 |
| 218 | |
| 219 | config GENERIC_BUG_RELATIVE_POINTERS |
| 220 | bool |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 221 | |
| 222 | config GENERIC_HWEIGHT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 223 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 224 | |
| 225 | config ARCH_MAY_HAVE_PC_FDC |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 226 | def_bool y |
| 227 | depends on ISA_DMA_API |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 228 | |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 229 | config RWSEM_XCHGADD_ALGORITHM |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 230 | def_bool y |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 231 | |
Sam Ravnborg | 1032c0b | 2007-11-06 21:35:08 +0100 | [diff] [blame] | 232 | config GENERIC_CALIBRATE_DELAY |
| 233 | def_bool y |
| 234 | |
venkatesh.pallipadi@intel.com | 9a0b841 | 2008-01-31 17:35:06 -0800 | [diff] [blame] | 235 | config ARCH_HAS_CPU_RELAX |
| 236 | def_bool y |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 237 | |
Pekka Enberg | 1b27d05 | 2008-04-28 02:12:22 -0700 | [diff] [blame] | 238 | config ARCH_HAS_CACHE_LINE_SIZE |
| 239 | def_bool y |
| 240 | |
Mike Travis | dd5af90 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 241 | config HAVE_SETUP_PER_CPU_AREA |
Brian Gerst | 89c9c4c | 2009-01-27 12:56:48 +0900 | [diff] [blame] | 242 | def_bool y |
travis@sgi.com | b32ef63 | 2008-01-30 13:32:51 +0100 | [diff] [blame] | 243 | |
Tejun Heo | 08fc458 | 2009-08-14 15:00:49 +0900 | [diff] [blame] | 244 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
| 245 | def_bool y |
| 246 | |
| 247 | config NEED_PER_CPU_PAGE_FIRST_CHUNK |
Tejun Heo | 1112441 | 2009-02-20 16:29:09 +0900 | [diff] [blame] | 248 | def_bool y |
| 249 | |
Johannes Berg | 801e406 | 2007-12-08 02:12:39 +0100 | [diff] [blame] | 250 | config ARCH_HIBERNATION_POSSIBLE |
| 251 | def_bool y |
Johannes Berg | 801e406 | 2007-12-08 02:12:39 +0100 | [diff] [blame] | 252 | |
Johannes Berg | f4cb570 | 2007-12-08 02:14:00 +0100 | [diff] [blame] | 253 | config ARCH_SUSPEND_POSSIBLE |
| 254 | def_bool y |
Johannes Berg | f4cb570 | 2007-12-08 02:14:00 +0100 | [diff] [blame] | 255 | |
Steve Capper | cfe28c5 | 2013-04-29 14:29:48 +0100 | [diff] [blame] | 256 | config ARCH_WANT_HUGE_PMD_SHARE |
| 257 | def_bool y |
| 258 | |
Steve Capper | 53313b2 | 2013-04-30 08:03:42 +0100 | [diff] [blame] | 259 | config ARCH_WANT_GENERAL_HUGETLB |
| 260 | def_bool y |
| 261 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 262 | config ZONE_DMA32 |
Jan Beulich | e0fd24a | 2015-02-05 15:39:34 +0000 | [diff] [blame] | 263 | def_bool y if X86_64 |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 264 | |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 265 | config AUDIT_ARCH |
Jan Beulich | e0fd24a | 2015-02-05 15:39:34 +0000 | [diff] [blame] | 266 | def_bool y if X86_64 |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 267 | |
Ingo Molnar | 765c68b | 2008-04-09 11:03:37 +0200 | [diff] [blame] | 268 | config ARCH_SUPPORTS_OPTIMIZED_INLINING |
| 269 | def_bool y |
| 270 | |
Akinobu Mita | 6a11f75 | 2009-03-31 15:23:17 -0700 | [diff] [blame] | 271 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
| 272 | def_bool y |
| 273 | |
Andrey Ryabinin | d6f2d75 | 2015-07-02 12:09:38 +0300 | [diff] [blame] | 274 | config KASAN_SHADOW_OFFSET |
| 275 | hex |
| 276 | depends on KASAN |
| 277 | default 0xdffffc0000000000 |
| 278 | |
Shane Wang | 69575d3 | 2009-09-01 18:25:07 -0700 | [diff] [blame] | 279 | config HAVE_INTEL_TXT |
| 280 | def_bool y |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 281 | depends on INTEL_IOMMU && ACPI |
Shane Wang | 69575d3 | 2009-09-01 18:25:07 -0700 | [diff] [blame] | 282 | |
Sam Ravnborg | 6b0c3d4 | 2008-01-30 13:32:27 +0100 | [diff] [blame] | 283 | config X86_32_SMP |
| 284 | def_bool y |
| 285 | depends on X86_32 && SMP |
| 286 | |
| 287 | config X86_64_SMP |
| 288 | def_bool y |
| 289 | depends on X86_64 && SMP |
| 290 | |
Tejun Heo | ccbeed3 | 2009-02-09 22:17:40 +0900 | [diff] [blame] | 291 | config X86_32_LAZY_GS |
| 292 | def_bool y |
Tejun Heo | 60a5317 | 2009-02-09 22:17:40 +0900 | [diff] [blame] | 293 | depends on X86_32 && !CC_STACKPROTECTOR |
Tejun Heo | ccbeed3 | 2009-02-09 22:17:40 +0900 | [diff] [blame] | 294 | |
Borislav Petkov | d61931d | 2010-03-05 17:34:46 +0100 | [diff] [blame] | 295 | config ARCH_HWEIGHT_CFLAGS |
| 296 | string |
| 297 | default "-fcall-saved-ecx -fcall-saved-edx" if X86_32 |
| 298 | default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64 |
| 299 | |
Srikar Dronamraju | 2b14449 | 2012-02-09 14:56:42 +0530 | [diff] [blame] | 300 | config ARCH_SUPPORTS_UPROBES |
| 301 | def_bool y |
| 302 | |
Rob Herring | d20642f | 2014-04-18 17:19:54 -0500 | [diff] [blame] | 303 | config FIX_EARLYCON_MEM |
| 304 | def_bool y |
| 305 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 306 | config PGTABLE_LEVELS |
| 307 | int |
| 308 | default 4 if X86_64 |
| 309 | default 3 if X86_PAE |
| 310 | default 2 |
| 311 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 312 | source "init/Kconfig" |
Matt Helsley | dc52ddc | 2008-10-18 20:27:21 -0700 | [diff] [blame] | 313 | source "kernel/Kconfig.freezer" |
Sam Ravnborg | 8d5fffb | 2007-11-06 23:30:30 +0100 | [diff] [blame] | 314 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 315 | menu "Processor type and features" |
| 316 | |
Randy Dunlap | 5ee7153 | 2012-01-16 11:57:18 -0800 | [diff] [blame] | 317 | config ZONE_DMA |
| 318 | bool "DMA memory allocation support" if EXPERT |
| 319 | default y |
| 320 | help |
| 321 | DMA memory allocation support allows devices with less than 32-bit |
| 322 | addressing to allocate within the first 16MB of address space. |
| 323 | Disable if no such devices will be used. |
| 324 | |
| 325 | If unsure, say Y. |
| 326 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 327 | config SMP |
| 328 | bool "Symmetric multi-processing support" |
| 329 | ---help--- |
| 330 | This enables support for systems with more than one CPU. If you have |
Robert Graffham | 4a47415 | 2014-01-23 15:55:29 -0800 | [diff] [blame] | 331 | a system with only one CPU, say N. If you have a system with more |
| 332 | than one CPU, say Y. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 333 | |
Robert Graffham | 4a47415 | 2014-01-23 15:55:29 -0800 | [diff] [blame] | 334 | If you say N here, the kernel will run on uni- and multiprocessor |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 335 | machines, but will use only one CPU of a multiprocessor machine. If |
| 336 | you say Y here, the kernel will run on many, but not all, |
Robert Graffham | 4a47415 | 2014-01-23 15:55:29 -0800 | [diff] [blame] | 337 | uniprocessor machines. On a uniprocessor machine, the kernel |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 338 | will run faster if you say N here. |
| 339 | |
| 340 | Note that if you say Y here and choose architecture "586" or |
| 341 | "Pentium" under "Processor family", the kernel will not work on 486 |
| 342 | architectures. Similarly, multiprocessor kernels for the "PPro" |
| 343 | architecture may not work on all Pentium based boards. |
| 344 | |
| 345 | People using multiprocessor machines who say Y here should also say |
| 346 | Y to "Enhanced Real Time Clock Support", below. The "Advanced Power |
| 347 | Management" code will be disabled if you say Y here. |
| 348 | |
Paul Bolle | 395cf96 | 2011-08-15 02:02:26 +0200 | [diff] [blame] | 349 | See also <file:Documentation/x86/i386/IO-APIC.txt>, |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 350 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
| 351 | <http://www.tldp.org/docs.html#howto>. |
| 352 | |
| 353 | If you don't know what to do here, say N. |
| 354 | |
Josh Triplett | 9def39be | 2013-10-30 08:09:45 -0700 | [diff] [blame] | 355 | config X86_FEATURE_NAMES |
| 356 | bool "Processor feature human-readable names" if EMBEDDED |
| 357 | default y |
| 358 | ---help--- |
| 359 | This option compiles in a table of x86 feature bits and corresponding |
| 360 | names. This is required to support /proc/cpuinfo and a few kernel |
| 361 | messages. You can disable this to save space, at the expense of |
| 362 | making those few kernel messages show numeric feature bits instead. |
| 363 | |
| 364 | If in doubt, say Y. |
| 365 | |
Borislav Petkov | 6e1315f | 2015-12-07 10:39:42 +0100 | [diff] [blame] | 366 | config X86_FAST_FEATURE_TESTS |
| 367 | bool "Fast CPU feature tests" if EMBEDDED |
| 368 | default y |
| 369 | ---help--- |
| 370 | Some fast-paths in the kernel depend on the capabilities of the CPU. |
| 371 | Say Y here for the kernel to patch in the appropriate code at runtime |
| 372 | based on the capabilities of the CPU. The infrastructure for patching |
| 373 | code at runtime takes up some additional space; space-constrained |
| 374 | embedded systems may wish to say N here to produce smaller, slightly |
| 375 | slower code. |
| 376 | |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 377 | config X86_X2APIC |
| 378 | bool "Support x2apic" |
Jan Kiszka | 19e3d60 | 2015-05-04 17:58:01 +0200 | [diff] [blame] | 379 | depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST) |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 380 | ---help--- |
| 381 | This enables x2apic support on CPUs that have this feature. |
| 382 | |
| 383 | This allows 32-bit apic IDs (so it can support very large systems), |
| 384 | and accesses the local apic via MSRs not via mmio. |
| 385 | |
Yinghai Lu | 06cd9a7 | 2009-02-16 17:29:58 -0800 | [diff] [blame] | 386 | If you don't know what to do here, say N. |
| 387 | |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 388 | config X86_MPPARSE |
Bin Gao | 6e87f9b7 | 2012-10-25 09:35:44 -0700 | [diff] [blame] | 389 | bool "Enable MPS table" if ACPI || SFI |
Jan Beulich | 7a52768 | 2008-10-30 10:38:24 +0000 | [diff] [blame] | 390 | default y |
Ingo Molnar | 5ab7472 | 2008-07-10 14:42:03 +0200 | [diff] [blame] | 391 | depends on X86_LOCAL_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 392 | ---help--- |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 393 | For old smp systems that do not have proper acpi support. Newer systems |
| 394 | (esp with 64bit cpus) with acpi support, MADT and DSDT will override it |
Yinghai Lu | 6695c85 | 2008-06-19 12:13:09 -0700 | [diff] [blame] | 395 | |
Yinghai Lu | 26f7ef1 | 2009-01-29 14:19:22 -0800 | [diff] [blame] | 396 | config X86_BIGSMP |
| 397 | bool "Support for big SMP systems with more than 8 CPUs" |
| 398 | depends on X86_32 && SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 399 | ---help--- |
Yinghai Lu | 26f7ef1 | 2009-01-29 14:19:22 -0800 | [diff] [blame] | 400 | This option is needed for the systems that have more than 8 CPUs |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 401 | |
Jun Nakajima | ddd70cf | 2013-01-21 17:23:09 +0000 | [diff] [blame] | 402 | config GOLDFISH |
| 403 | def_bool y |
| 404 | depends on X86_GOLDFISH |
| 405 | |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 406 | if X86_32 |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 407 | config X86_EXTENDED_PLATFORM |
| 408 | bool "Support for extended (non-PC) x86 platforms" |
| 409 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 410 | ---help--- |
Ingo Molnar | 06ac834 | 2009-01-27 18:11:43 +0100 | [diff] [blame] | 411 | If you disable this option then the kernel will only support |
| 412 | standard PC platforms. (which covers the vast majority of |
| 413 | systems out there.) |
| 414 | |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 415 | If you enable this option then you'll be able to select support |
| 416 | for the following (non-PC) 32 bit x86 platforms: |
Ben Hutchings | cb7b802 | 2013-06-24 01:05:25 +0100 | [diff] [blame] | 417 | Goldfish (Android emulator) |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 418 | AMD Elan |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 419 | RDC R-321x SoC |
| 420 | SGI 320/540 (Visual Workstation) |
Alessandro Rubini | 83125a3 | 2012-04-04 19:40:21 +0200 | [diff] [blame] | 421 | STA2X11-based (e.g. Northville) |
Thomas Gleixner | 3f4110a | 2009-08-29 14:54:20 +0200 | [diff] [blame] | 422 | Moorestown MID devices |
Ingo Molnar | 06ac834 | 2009-01-27 18:11:43 +0100 | [diff] [blame] | 423 | |
| 424 | If you have one of these systems, or if you want to build a |
| 425 | generic distribution kernel, say Y here - otherwise say N. |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 426 | endif |
Ingo Molnar | 06ac834 | 2009-01-27 18:11:43 +0100 | [diff] [blame] | 427 | |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 428 | if X86_64 |
| 429 | config X86_EXTENDED_PLATFORM |
| 430 | bool "Support for extended (non-PC) x86 platforms" |
| 431 | default y |
| 432 | ---help--- |
| 433 | If you disable this option then the kernel will only support |
| 434 | standard PC platforms. (which covers the vast majority of |
| 435 | systems out there.) |
| 436 | |
| 437 | If you enable this option then you'll be able to select support |
| 438 | for the following (non-PC) 64 bit x86 platforms: |
Steffen Persvold | 44b111b5 | 2011-12-06 00:07:26 +0800 | [diff] [blame] | 439 | Numascale NumaChip |
Ravikiran G Thirumalai | 8425091 | 2009-02-20 16:59:11 -0800 | [diff] [blame] | 440 | ScaleMP vSMP |
| 441 | SGI Ultraviolet |
| 442 | |
| 443 | If you have one of these systems, or if you want to build a |
| 444 | generic distribution kernel, say Y here - otherwise say N. |
| 445 | endif |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 446 | # This is an alphabetically sorted list of 64 bit extended platforms |
| 447 | # Please maintain the alphabetic order if and when there are additions |
Steffen Persvold | 44b111b5 | 2011-12-06 00:07:26 +0800 | [diff] [blame] | 448 | config X86_NUMACHIP |
| 449 | bool "Numascale NumaChip" |
| 450 | depends on X86_64 |
| 451 | depends on X86_EXTENDED_PLATFORM |
| 452 | depends on NUMA |
| 453 | depends on SMP |
| 454 | depends on X86_X2APIC |
Daniel J Blueman | f9726bf | 2012-12-07 14:24:32 -0700 | [diff] [blame] | 455 | depends on PCI_MMCONFIG |
Steffen Persvold | 44b111b5 | 2011-12-06 00:07:26 +0800 | [diff] [blame] | 456 | ---help--- |
| 457 | Adds support for Numascale NumaChip large-SMP systems. Needed to |
| 458 | enable more than ~168 cores. |
| 459 | If you don't have one of these, you should say N here. |
Nick Piggin | 03b4863 | 2009-01-20 04:36:04 +0100 | [diff] [blame] | 460 | |
Ingo Molnar | 6a48565 | 2009-01-27 18:29:13 +0100 | [diff] [blame] | 461 | config X86_VSMP |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 462 | bool "ScaleMP vSMP" |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 463 | select HYPERVISOR_GUEST |
Ingo Molnar | 6a48565 | 2009-01-27 18:29:13 +0100 | [diff] [blame] | 464 | select PARAVIRT |
| 465 | depends on X86_64 && PCI |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 466 | depends on X86_EXTENDED_PLATFORM |
Shai Fultheim | ead91d4 | 2012-04-16 10:39:35 +0300 | [diff] [blame] | 467 | depends on SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 468 | ---help--- |
Ingo Molnar | 6a48565 | 2009-01-27 18:29:13 +0100 | [diff] [blame] | 469 | Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is |
| 470 | supposed to run on these EM64T-based machines. Only choose this option |
| 471 | if you have one of these machines. |
| 472 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 473 | config X86_UV |
| 474 | bool "SGI Ultraviolet" |
| 475 | depends on X86_64 |
| 476 | depends on X86_EXTENDED_PLATFORM |
Jack Steiner | 54c28d2 | 2009-04-03 15:39:42 -0500 | [diff] [blame] | 477 | depends on NUMA |
Andrew Morton | 1ecb4ae | 2016-02-11 16:13:20 -0800 | [diff] [blame] | 478 | depends on EFI |
Suresh Siddha | 9d6c26e | 2009-04-20 13:02:31 -0700 | [diff] [blame] | 479 | depends on X86_X2APIC |
Ingo Molnar | 1222e56 | 2015-05-06 06:23:59 +0200 | [diff] [blame] | 480 | depends on PCI |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 481 | ---help--- |
| 482 | This option is needed in order to support SGI Ultraviolet systems. |
| 483 | If you don't have one of these, you should say N here. |
| 484 | |
| 485 | # Following is an alphabetically sorted list of 32 bit extended platforms |
| 486 | # Please maintain the alphabetic order if and when there are additions |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 487 | |
Jun Nakajima | ddd70cf | 2013-01-21 17:23:09 +0000 | [diff] [blame] | 488 | config X86_GOLDFISH |
| 489 | bool "Goldfish (Virtual Platform)" |
Ben Hutchings | cb7b802 | 2013-06-24 01:05:25 +0100 | [diff] [blame] | 490 | depends on X86_EXTENDED_PLATFORM |
Jun Nakajima | ddd70cf | 2013-01-21 17:23:09 +0000 | [diff] [blame] | 491 | ---help--- |
| 492 | Enable support for the Goldfish virtual platform used primarily |
| 493 | for Android development. Unless you are building for the Android |
| 494 | Goldfish emulator say N here. |
| 495 | |
Thomas Gleixner | c751e17 | 2010-11-09 12:08:04 -0800 | [diff] [blame] | 496 | config X86_INTEL_CE |
| 497 | bool "CE4100 TV platform" |
| 498 | depends on PCI |
| 499 | depends on PCI_GODIRECT |
Jiang Liu | 6084a6e | 2014-06-09 16:19:46 +0800 | [diff] [blame] | 500 | depends on X86_IO_APIC |
Thomas Gleixner | c751e17 | 2010-11-09 12:08:04 -0800 | [diff] [blame] | 501 | depends on X86_32 |
| 502 | depends on X86_EXTENDED_PLATFORM |
Dirk Brandewie | 37bc9f5 | 2010-11-09 12:08:08 -0800 | [diff] [blame] | 503 | select X86_REBOOTFIXUPS |
Sebastian Andrzej Siewior | da6b737 | 2011-02-22 21:07:37 +0100 | [diff] [blame] | 504 | select OF |
| 505 | select OF_EARLY_FLATTREE |
Thomas Gleixner | c751e17 | 2010-11-09 12:08:04 -0800 | [diff] [blame] | 506 | ---help--- |
| 507 | Select for the Intel CE media processor (CE4100) SOC. |
| 508 | This option compiles in support for the CE4100 SOC for settop |
| 509 | boxes and media devices. |
| 510 | |
David Cohen | 4cb9b00 | 2013-12-16 17:37:26 -0800 | [diff] [blame] | 511 | config X86_INTEL_MID |
Alan Cox | 43605ef | 2011-07-12 17:49:29 +0100 | [diff] [blame] | 512 | bool "Intel MID platform support" |
Alan Cox | 43605ef | 2011-07-12 17:49:29 +0100 | [diff] [blame] | 513 | depends on X86_EXTENDED_PLATFORM |
David Cohen | edc6bc7 | 2014-01-21 10:41:39 -0800 | [diff] [blame] | 514 | depends on X86_PLATFORM_DEVICES |
Alan Cox | 1ea7c67 | 2011-11-10 13:29:14 +0000 | [diff] [blame] | 515 | depends on PCI |
Andy Shevchenko | 3fda5bb | 2016-01-15 22:11:07 +0200 | [diff] [blame] | 516 | depends on X86_64 || (PCI_GOANY && X86_32) |
Alan Cox | 1ea7c67 | 2011-11-10 13:29:14 +0000 | [diff] [blame] | 517 | depends on X86_IO_APIC |
Alan Cox | 7c9c3a1 | 2011-12-29 14:43:16 +0000 | [diff] [blame] | 518 | select SFI |
David Cohen | 4cb9b00 | 2013-12-16 17:37:26 -0800 | [diff] [blame] | 519 | select I2C |
Alan Cox | 7c9c3a1 | 2011-12-29 14:43:16 +0000 | [diff] [blame] | 520 | select DW_APB_TIMER |
Alan Cox | 1ea7c67 | 2011-11-10 13:29:14 +0000 | [diff] [blame] | 521 | select APB_TIMER |
Alan Cox | 1ea7c67 | 2011-11-10 13:29:14 +0000 | [diff] [blame] | 522 | select INTEL_SCU_IPC |
Mika Westerberg | 15a713d | 2012-01-26 17:35:05 +0000 | [diff] [blame] | 523 | select MFD_INTEL_MSIC |
Alan Cox | 1ea7c67 | 2011-11-10 13:29:14 +0000 | [diff] [blame] | 524 | ---help--- |
David Cohen | 4cb9b00 | 2013-12-16 17:37:26 -0800 | [diff] [blame] | 525 | Select to build a kernel capable of supporting Intel MID (Mobile |
| 526 | Internet Device) platform systems which do not have the PCI legacy |
| 527 | interfaces. If you are building for a PC class system say N here. |
Alan Cox | 1ea7c67 | 2011-11-10 13:29:14 +0000 | [diff] [blame] | 528 | |
David Cohen | 4cb9b00 | 2013-12-16 17:37:26 -0800 | [diff] [blame] | 529 | Intel MID platforms are based on an Intel processor and chipset which |
| 530 | consume less power than most of the x86 derivatives. |
Alan Cox | 43605ef | 2011-07-12 17:49:29 +0100 | [diff] [blame] | 531 | |
Bryan O'Donoghue | 8bbc2a1 | 2015-01-30 16:29:39 +0000 | [diff] [blame] | 532 | config X86_INTEL_QUARK |
| 533 | bool "Intel Quark platform support" |
| 534 | depends on X86_32 |
| 535 | depends on X86_EXTENDED_PLATFORM |
| 536 | depends on X86_PLATFORM_DEVICES |
| 537 | depends on X86_TSC |
| 538 | depends on PCI |
| 539 | depends on PCI_GOANY |
| 540 | depends on X86_IO_APIC |
| 541 | select IOSF_MBI |
| 542 | select INTEL_IMR |
Andy Shevchenko | 9ab6eb5 | 2015-03-05 17:24:04 +0200 | [diff] [blame] | 543 | select COMMON_CLK |
Bryan O'Donoghue | 8bbc2a1 | 2015-01-30 16:29:39 +0000 | [diff] [blame] | 544 | ---help--- |
| 545 | Select to include support for Quark X1000 SoC. |
| 546 | Say Y here if you have a Quark based system such as the Arduino |
| 547 | compatible Intel Galileo. |
| 548 | |
Mika Westerberg | 3d48aab | 2013-01-18 13:45:59 +0000 | [diff] [blame] | 549 | config X86_INTEL_LPSS |
| 550 | bool "Intel Low Power Subsystem Support" |
Andy Shevchenko | eebb3e8 | 2015-12-12 02:45:06 +0100 | [diff] [blame] | 551 | depends on X86 && ACPI |
Mika Westerberg | 3d48aab | 2013-01-18 13:45:59 +0000 | [diff] [blame] | 552 | select COMMON_CLK |
Mathias Nyman | 0f53143 | 2013-09-13 17:02:29 +0300 | [diff] [blame] | 553 | select PINCTRL |
Andy Shevchenko | eebb3e8 | 2015-12-12 02:45:06 +0100 | [diff] [blame] | 554 | select IOSF_MBI |
Mika Westerberg | 3d48aab | 2013-01-18 13:45:59 +0000 | [diff] [blame] | 555 | ---help--- |
| 556 | Select to build support for Intel Low Power Subsystem such as |
| 557 | found on Intel Lynxpoint PCH. Selecting this option enables |
Mathias Nyman | 0f53143 | 2013-09-13 17:02:29 +0300 | [diff] [blame] | 558 | things like clock tree (common clock framework) and pincontrol |
| 559 | which are needed by the LPSS peripheral drivers. |
Mika Westerberg | 3d48aab | 2013-01-18 13:45:59 +0000 | [diff] [blame] | 560 | |
Ken Xue | 92082a8 | 2015-02-06 08:27:51 +0800 | [diff] [blame] | 561 | config X86_AMD_PLATFORM_DEVICE |
| 562 | bool "AMD ACPI2Platform devices support" |
| 563 | depends on ACPI |
| 564 | select COMMON_CLK |
| 565 | select PINCTRL |
| 566 | ---help--- |
| 567 | Select to interpret AMD specific ACPI device to platform device |
| 568 | such as I2C, UART, GPIO found on AMD Carrizo and later chipsets. |
| 569 | I2C and UART depend on COMMON_CLK to set clock. GPIO driver is |
| 570 | implemented under PINCTRL subsystem. |
| 571 | |
David E. Box | ced3ce7 | 2014-09-17 22:13:50 -0700 | [diff] [blame] | 572 | config IOSF_MBI |
| 573 | tristate "Intel SoC IOSF Sideband support for SoC platforms" |
| 574 | depends on PCI |
| 575 | ---help--- |
| 576 | This option enables sideband register access support for Intel SoC |
| 577 | platforms. On these platforms the IOSF sideband is used in lieu of |
| 578 | MSR's for some register accesses, mostly but not limited to thermal |
| 579 | and power. Drivers may query the availability of this device to |
| 580 | determine if they need the sideband in order to work on these |
| 581 | platforms. The sideband is available on the following SoC products. |
| 582 | This list is not meant to be exclusive. |
| 583 | - BayTrail |
| 584 | - Braswell |
| 585 | - Quark |
| 586 | |
| 587 | You should say Y if you are running a kernel on one of these SoC's. |
| 588 | |
David E. Box | ed2226b | 2014-09-17 22:13:51 -0700 | [diff] [blame] | 589 | config IOSF_MBI_DEBUG |
| 590 | bool "Enable IOSF sideband access through debugfs" |
| 591 | depends on IOSF_MBI && DEBUG_FS |
| 592 | ---help--- |
| 593 | Select this option to expose the IOSF sideband access registers (MCR, |
| 594 | MDR, MCRX) through debugfs to write and read register information from |
| 595 | different units on the SoC. This is most useful for obtaining device |
| 596 | state information for debug and analysis. As this is a general access |
| 597 | mechanism, users of this option would have specific knowledge of the |
| 598 | device they want to access. |
| 599 | |
| 600 | If you don't require the option or are in doubt, say N. |
| 601 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 602 | config X86_RDC321X |
| 603 | bool "RDC R-321x SoC" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 604 | depends on X86_32 |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 605 | depends on X86_EXTENDED_PLATFORM |
| 606 | select M486 |
| 607 | select X86_REBOOTFIXUPS |
| 608 | ---help--- |
| 609 | This option is needed for RDC R-321x system-on-chip, also known |
| 610 | as R-8610-(G). |
| 611 | If you don't have one of these chips, you should say N here. |
| 612 | |
Ingo Molnar | e0c7ae3 | 2009-01-27 18:43:09 +0100 | [diff] [blame] | 613 | config X86_32_NON_STANDARD |
Ingo Molnar | 9c39801 | 2009-01-27 18:24:57 +0100 | [diff] [blame] | 614 | bool "Support non-standard 32-bit SMP architectures" |
| 615 | depends on X86_32 && SMP |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 616 | depends on X86_EXTENDED_PLATFORM |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 617 | ---help--- |
H. Peter Anvin | b5660ba | 2014-02-25 12:14:06 -0800 | [diff] [blame] | 618 | This option compiles in the bigsmp and STA2X11 default |
| 619 | subarchitectures. It is intended for a generic binary |
| 620 | kernel. If you select them all, kernel will probe it one by |
| 621 | one and will fallback to default. |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 622 | |
Ravikiran G Thirumalai | c5c606d | 2009-02-09 18:18:14 -0800 | [diff] [blame] | 623 | # Alphabetically sorted list of Non standard 32 bit platforms |
Yinghai Lu | d49c428 | 2008-06-08 18:31:54 -0700 | [diff] [blame] | 624 | |
Linus Torvalds | d949f36 | 2009-09-26 09:35:07 -0700 | [diff] [blame] | 625 | config X86_SUPPORTS_MEMORY_FAILURE |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 626 | def_bool y |
Linus Torvalds | d949f36 | 2009-09-26 09:35:07 -0700 | [diff] [blame] | 627 | # MCE code calls memory_failure(): |
| 628 | depends on X86_MCE |
| 629 | # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags: |
Linus Torvalds | d949f36 | 2009-09-26 09:35:07 -0700 | [diff] [blame] | 630 | # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH: |
| 631 | depends on X86_64 || !SPARSEMEM |
| 632 | select ARCH_SUPPORTS_MEMORY_FAILURE |
Linus Torvalds | d949f36 | 2009-09-26 09:35:07 -0700 | [diff] [blame] | 633 | |
Alessandro Rubini | 83125a3 | 2012-04-04 19:40:21 +0200 | [diff] [blame] | 634 | config STA2X11 |
| 635 | bool "STA2X11 Companion Chip Support" |
| 636 | depends on X86_32_NON_STANDARD && PCI |
| 637 | select X86_DEV_DMA_OPS |
| 638 | select X86_DMA_REMAP |
| 639 | select SWIOTLB |
| 640 | select MFD_STA2X11 |
| 641 | select ARCH_REQUIRE_GPIOLIB |
| 642 | default n |
| 643 | ---help--- |
| 644 | This adds support for boards based on the STA2X11 IO-Hub, |
| 645 | a.k.a. "ConneXt". The chip is used in place of the standard |
| 646 | PC chipset, so all "standard" peripherals are missing. If this |
| 647 | option is selected the kernel will still be able to boot on |
| 648 | standard PC machines. |
| 649 | |
Shérab | 82148d1 | 2010-09-25 06:06:57 +0200 | [diff] [blame] | 650 | config X86_32_IRIS |
| 651 | tristate "Eurobraille/Iris poweroff module" |
| 652 | depends on X86_32 |
| 653 | ---help--- |
| 654 | The Iris machines from EuroBraille do not have APM or ACPI support |
| 655 | to shut themselves down properly. A special I/O sequence is |
| 656 | needed to do so, which is what this module does at |
| 657 | kernel shutdown. |
| 658 | |
| 659 | This is only for Iris machines from EuroBraille. |
| 660 | |
| 661 | If unused, say N. |
| 662 | |
Ingo Molnar | ae1e913 | 2008-11-11 09:05:16 +0100 | [diff] [blame] | 663 | config SCHED_OMIT_FRAME_POINTER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 664 | def_bool y |
| 665 | prompt "Single-depth WCHAN output" |
Ken Chen | a87d091 | 2008-11-06 11:10:49 -0800 | [diff] [blame] | 666 | depends on X86 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 667 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 668 | Calculate simpler /proc/<PID>/wchan values. If this option |
| 669 | is disabled then wchan values will recurse back to the |
| 670 | caller function. This provides more accurate wchan values, |
| 671 | at the expense of slightly more scheduling overhead. |
| 672 | |
| 673 | If in doubt, say "Y". |
| 674 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 675 | menuconfig HYPERVISOR_GUEST |
| 676 | bool "Linux guest support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 677 | ---help--- |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 678 | Say Y here to enable options for running Linux under various hyper- |
| 679 | visors. This option enables basic hypervisor detection and platform |
| 680 | setup. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 681 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 682 | If you say N, all options in this submenu will be skipped and |
| 683 | disabled, and Linux guest support won't be built in. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 684 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 685 | if HYPERVISOR_GUEST |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 686 | |
Eduardo Pereira Habkost | e61bd94 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 687 | config PARAVIRT |
| 688 | bool "Enable paravirtualization code" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 689 | ---help--- |
Eduardo Pereira Habkost | e61bd94 | 2008-01-30 13:33:32 +0100 | [diff] [blame] | 690 | This changes the kernel so it can modify itself when it is run |
| 691 | under a hypervisor, potentially improving performance significantly |
| 692 | over full virtualization. However, when run without a hypervisor |
| 693 | the kernel is theoretically slower and slightly larger. |
| 694 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 695 | config PARAVIRT_DEBUG |
| 696 | bool "paravirt-ops debugging" |
| 697 | depends on PARAVIRT && DEBUG_KERNEL |
| 698 | ---help--- |
| 699 | Enable to debug paravirt_ops internals. Specifically, BUG if |
| 700 | a paravirt_op is missing when it is called. |
| 701 | |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 702 | config PARAVIRT_SPINLOCKS |
| 703 | bool "Paravirtualization layer for spinlocks" |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 704 | depends on PARAVIRT && SMP |
Ingo Molnar | 62c7a1e | 2015-05-11 09:47:23 +0200 | [diff] [blame] | 705 | select UNINLINE_SPIN_UNLOCK if !QUEUED_SPINLOCKS |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 706 | ---help--- |
| 707 | Paravirtualized spinlocks allow a pvops backend to replace the |
| 708 | spinlock implementation with something virtualization-friendly |
| 709 | (for example, block the virtual CPU rather than spinning). |
| 710 | |
Raghavendra K T | 4c4e4f6 | 2013-10-21 21:35:08 +0530 | [diff] [blame] | 711 | It has a minimal impact on native kernels and gives a nice performance |
| 712 | benefit on paravirtualized KVM / Xen kernels. |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 713 | |
Raghavendra K T | 4c4e4f6 | 2013-10-21 21:35:08 +0530 | [diff] [blame] | 714 | If you are unsure how to answer this question, answer Y. |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 715 | |
Waiman Long | 45e898b | 2015-11-09 19:09:25 -0500 | [diff] [blame] | 716 | config QUEUED_LOCK_STAT |
| 717 | bool "Paravirt queued spinlock statistics" |
| 718 | depends on PARAVIRT_SPINLOCKS && DEBUG_FS && QUEUED_SPINLOCKS |
| 719 | ---help--- |
| 720 | Enable the collection of statistical data on the slowpath |
| 721 | behavior of paravirtualized queued spinlocks and report |
| 722 | them on debugfs. |
| 723 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 724 | source "arch/x86/xen/Kconfig" |
| 725 | |
| 726 | config KVM_GUEST |
| 727 | bool "KVM Guest support (including kvmclock)" |
| 728 | depends on PARAVIRT |
| 729 | select PARAVIRT_CLOCK |
| 730 | default y |
| 731 | ---help--- |
| 732 | This option enables various optimizations for running under the KVM |
| 733 | hypervisor. It includes a paravirtualized clock, so that instead |
| 734 | of relying on a PIT (or probably other) emulation by the |
| 735 | underlying device model, the host provides the guest with |
| 736 | timing infrastructure such as time of day, and system time |
| 737 | |
Srivatsa Vaddagiri | 1e20eb8 | 2013-08-09 19:52:01 +0530 | [diff] [blame] | 738 | config KVM_DEBUG_FS |
| 739 | bool "Enable debug information for KVM Guests in debugfs" |
| 740 | depends on KVM_GUEST && DEBUG_FS |
| 741 | default n |
| 742 | ---help--- |
| 743 | This option enables collection of various statistics for KVM guest. |
| 744 | Statistics are displayed in debugfs filesystem. Enabling this option |
| 745 | may incur significant overhead. |
| 746 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 747 | source "arch/x86/lguest/Kconfig" |
| 748 | |
| 749 | config PARAVIRT_TIME_ACCOUNTING |
| 750 | bool "Paravirtual steal time accounting" |
| 751 | depends on PARAVIRT |
| 752 | default n |
| 753 | ---help--- |
| 754 | Select this option to enable fine granularity task steal time |
| 755 | accounting. Time spent executing other tasks in parallel with |
| 756 | the current vCPU is discounted from the vCPU power. To account for |
| 757 | that, there can be a small performance impact. |
| 758 | |
| 759 | If in doubt, say N here. |
| 760 | |
Gerd Hoffmann | 7af192c | 2008-06-03 16:17:29 +0200 | [diff] [blame] | 761 | config PARAVIRT_CLOCK |
| 762 | bool |
Gerd Hoffmann | 7af192c | 2008-06-03 16:17:29 +0200 | [diff] [blame] | 763 | |
Borislav Petkov | 6276a07 | 2013-03-04 21:20:21 +0100 | [diff] [blame] | 764 | endif #HYPERVISOR_GUEST |
Jeremy Fitzhardinge | 9734913 | 2008-06-25 00:19:14 -0400 | [diff] [blame] | 765 | |
Yinghai Lu | 0867721 | 2010-02-10 01:20:20 -0800 | [diff] [blame] | 766 | config NO_BOOTMEM |
Yinghai Lu | 774ea0b | 2010-08-25 13:39:18 -0700 | [diff] [blame] | 767 | def_bool y |
Yinghai Lu | 0867721 | 2010-02-10 01:20:20 -0800 | [diff] [blame] | 768 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 769 | source "arch/x86/Kconfig.cpu" |
| 770 | |
| 771 | config HPET_TIMER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 772 | def_bool X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 773 | prompt "HPET Timer Support" if X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 774 | ---help--- |
| 775 | Use the IA-PC HPET (High Precision Event Timer) to manage |
| 776 | time in preference to the PIT and RTC, if a HPET is |
| 777 | present. |
| 778 | HPET is the next generation timer replacing legacy 8254s. |
| 779 | The HPET provides a stable time base on SMP |
| 780 | systems, unlike the TSC, but it is more expensive to access, |
Michael S. Tsirkin | 4e7f9df | 2016-02-11 01:05:01 +0200 | [diff] [blame] | 781 | as it is off-chip. The interface used is documented |
| 782 | in the HPET spec, revision 1. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 783 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 784 | You can safely choose Y here. However, HPET will only be |
| 785 | activated if the platform and the BIOS support this feature. |
| 786 | Otherwise the 8254 will be used for timing services. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 787 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 788 | Choose N to continue using the legacy 8254 timer. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 789 | |
| 790 | config HPET_EMULATE_RTC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 791 | def_bool y |
Bernhard Walle | 9d8af78 | 2008-02-06 01:38:52 -0800 | [diff] [blame] | 792 | depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 793 | |
Jacob Pan | bb24c47 | 2009-09-02 07:37:17 -0700 | [diff] [blame] | 794 | config APB_TIMER |
Alan Cox | 933b946 | 2011-12-17 17:43:40 +0000 | [diff] [blame] | 795 | def_bool y if X86_INTEL_MID |
| 796 | prompt "Intel MID APB Timer Support" if X86_INTEL_MID |
Jamie Iles | 06c3df4 | 2011-06-06 12:43:07 +0100 | [diff] [blame] | 797 | select DW_APB_TIMER |
Alan Cox | a0c3832 | 2011-12-17 21:57:25 +0000 | [diff] [blame] | 798 | depends on X86_INTEL_MID && SFI |
Jacob Pan | bb24c47 | 2009-09-02 07:37:17 -0700 | [diff] [blame] | 799 | help |
| 800 | APB timer is the replacement for 8254, HPET on X86 MID platforms. |
| 801 | The APBT provides a stable time base on SMP |
| 802 | systems, unlike the TSC, but it is more expensive to access, |
| 803 | as it is off-chip. APB timers are always running regardless of CPU |
| 804 | C states, they are used as per CPU clockevent device when possible. |
| 805 | |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 806 | # Mark as expert because too many people got it wrong. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 807 | # The code disables itself when not needed. |
Thomas Petazzoni | 7ae9392 | 2008-04-28 02:14:14 -0700 | [diff] [blame] | 808 | config DMI |
| 809 | default y |
Ard Biesheuvel | cf07440 | 2014-01-23 15:54:39 -0800 | [diff] [blame] | 810 | select DMI_SCAN_MACHINE_NON_EFI_FALLBACK |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 811 | bool "Enable DMI scanning" if EXPERT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 812 | ---help--- |
Thomas Petazzoni | 7ae9392 | 2008-04-28 02:14:14 -0700 | [diff] [blame] | 813 | Enabled scanning of DMI to identify machine quirks. Say Y |
| 814 | here unless you have verified that your setup is not |
| 815 | affected by entries in the DMI blacklist. Required by PNP |
| 816 | BIOS code. |
| 817 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 818 | config GART_IOMMU |
Andi Kleen | 38901f1 | 2013-10-04 14:37:56 -0700 | [diff] [blame] | 819 | bool "Old AMD GART IOMMU support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 820 | select SWIOTLB |
Andreas Herrmann | 23ac4ae | 2010-09-17 18:03:43 +0200 | [diff] [blame] | 821 | depends on X86_64 && PCI && AMD_NB |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 822 | ---help--- |
Ingo Molnar | ced3c42 | 2013-10-06 11:45:20 +0200 | [diff] [blame] | 823 | Provides a driver for older AMD Athlon64/Opteron/Turion/Sempron |
| 824 | GART based hardware IOMMUs. |
| 825 | |
| 826 | The GART supports full DMA access for devices with 32-bit access |
| 827 | limitations, on systems with more than 3 GB. This is usually needed |
| 828 | for USB, sound, many IDE/SATA chipsets and some other devices. |
| 829 | |
| 830 | Newer systems typically have a modern AMD IOMMU, supported via |
| 831 | the CONFIG_AMD_IOMMU=y config option. |
| 832 | |
| 833 | In normal configurations this driver is only active when needed: |
| 834 | there's more than 3 GB of memory and the system contains a |
| 835 | 32-bit limited device. |
| 836 | |
| 837 | If unsure, say Y. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 838 | |
| 839 | config CALGARY_IOMMU |
| 840 | bool "IBM Calgary IOMMU support" |
| 841 | select SWIOTLB |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 842 | depends on X86_64 && PCI |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 843 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 844 | Support for hardware IOMMUs in IBM's xSeries x366 and x460 |
| 845 | systems. Needed to run systems with more than 3GB of memory |
| 846 | properly with 32-bit PCI devices that do not support DAC |
| 847 | (Double Address Cycle). Calgary also supports bus level |
| 848 | isolation, where all DMAs pass through the IOMMU. This |
| 849 | prevents them from going anywhere except their intended |
| 850 | destination. This catches hard-to-find kernel bugs and |
| 851 | mis-behaving drivers and devices that do not use the DMA-API |
| 852 | properly to set up their DMA buffers. The IOMMU can be |
| 853 | turned off at boot time with the iommu=off parameter. |
| 854 | Normally the kernel will make the right choice by itself. |
| 855 | If unsure, say Y. |
| 856 | |
| 857 | config CALGARY_IOMMU_ENABLED_BY_DEFAULT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 858 | def_bool y |
| 859 | prompt "Should Calgary be enabled by default?" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 860 | depends on CALGARY_IOMMU |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 861 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 862 | Should Calgary be enabled by default? if you choose 'y', Calgary |
| 863 | will be used (if it exists). If you choose 'n', Calgary will not be |
| 864 | used even if it exists. If you choose 'n' and would like to use |
| 865 | Calgary anyway, pass 'iommu=calgary' on the kernel command line. |
| 866 | If unsure, say Y. |
| 867 | |
| 868 | # need this always selected by IOMMU for the VIA workaround |
| 869 | config SWIOTLB |
Joerg Roedel | a1afd01 | 2008-11-18 12:44:21 +0100 | [diff] [blame] | 870 | def_bool y if X86_64 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 871 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 872 | Support for software bounce buffers used on x86-64 systems |
Joe Millenbach | 4454d32 | 2012-09-02 17:38:20 -0700 | [diff] [blame] | 873 | which don't have a hardware IOMMU. Using this PCI devices |
| 874 | which can only access 32-bits of memory can be used on systems |
| 875 | with more than 3 GB of memory. |
| 876 | If unsure, say Y. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 877 | |
FUJITA Tomonori | a852250 | 2008-04-29 00:59:36 -0700 | [diff] [blame] | 878 | config IOMMU_HELPER |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 879 | def_bool y |
| 880 | depends on CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 881 | |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 882 | config MAXSMP |
Samuel Thibault | ddb0c5a | 2010-08-21 21:32:41 +0200 | [diff] [blame] | 883 | bool "Enable Maximum number of SMP Processors and NUMA Nodes" |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 884 | depends on X86_64 && SMP && DEBUG_KERNEL |
Mike Travis | 36f5101 | 2008-12-16 17:33:51 -0800 | [diff] [blame] | 885 | select CPUMASK_OFFSTACK |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 886 | ---help--- |
Samuel Thibault | ddb0c5a | 2010-08-21 21:32:41 +0200 | [diff] [blame] | 887 | Enable maximum number of CPUS and NUMA Nodes for this architecture. |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 888 | If unsure, say N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 889 | |
| 890 | config NR_CPUS |
Mike Travis | 36f5101 | 2008-12-16 17:33:51 -0800 | [diff] [blame] | 891 | int "Maximum number of CPUs" if SMP && !MAXSMP |
Michael K. Johnson | 2a3313f | 2009-04-21 21:44:48 -0400 | [diff] [blame] | 892 | range 2 8 if SMP && X86_32 && !X86_BIGSMP |
Josh Boyer | bb61ccc | 2013-11-05 09:37:29 -0500 | [diff] [blame] | 893 | range 2 512 if SMP && !MAXSMP && !CPUMASK_OFFSTACK |
Josh Boyer | b53b5ed | 2013-11-05 09:38:16 -0500 | [diff] [blame] | 894 | range 2 8192 if SMP && !MAXSMP && CPUMASK_OFFSTACK && X86_64 |
Mike Travis | 78637a97 | 2008-12-16 17:34:00 -0800 | [diff] [blame] | 895 | default "1" if !SMP |
Josh Boyer | b53b5ed | 2013-11-05 09:38:16 -0500 | [diff] [blame] | 896 | default "8192" if MAXSMP |
H. Peter Anvin | b5660ba | 2014-02-25 12:14:06 -0800 | [diff] [blame] | 897 | default "32" if SMP && X86_BIGSMP |
Kirill A. Shutemov | c5c1994 | 2015-05-08 13:25:45 +0300 | [diff] [blame] | 898 | default "8" if SMP && X86_32 |
| 899 | default "64" if SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 900 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 901 | This allows you to specify the maximum number of CPUs which this |
Josh Boyer | bb61ccc | 2013-11-05 09:37:29 -0500 | [diff] [blame] | 902 | kernel will support. If CPUMASK_OFFSTACK is enabled, the maximum |
Kirill A. Shutemov | cad14bb | 2015-05-08 13:25:26 +0300 | [diff] [blame] | 903 | supported value is 8192, otherwise the maximum value is 512. The |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 904 | minimum value which makes sense is 2. |
| 905 | |
| 906 | This is purely to save memory - each supported CPU adds |
| 907 | approximately eight kilobytes to the kernel image. |
| 908 | |
| 909 | config SCHED_SMT |
| 910 | bool "SMT (Hyperthreading) scheduler support" |
Borislav Petkov | c8e56d2 | 2015-06-04 18:55:25 +0200 | [diff] [blame] | 911 | depends on SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 912 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 913 | SMT scheduler support improves the CPU scheduler's decision making |
| 914 | when dealing with Intel Pentium 4 chips with HyperThreading at a |
| 915 | cost of slightly increased overhead in some places. If unsure say |
| 916 | N here. |
| 917 | |
| 918 | config SCHED_MC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 919 | def_bool y |
| 920 | prompt "Multi-core scheduler support" |
Borislav Petkov | c8e56d2 | 2015-06-04 18:55:25 +0200 | [diff] [blame] | 921 | depends on SMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 922 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 923 | Multi-core scheduler support improves the CPU scheduler's decision |
| 924 | making when dealing with multi-core CPU chips at a cost of slightly |
| 925 | increased overhead in some places. If unsure say N here. |
| 926 | |
| 927 | source "kernel/Kconfig.preempt" |
| 928 | |
Thomas Gleixner | 30b8b00 | 2015-01-15 21:22:39 +0000 | [diff] [blame] | 929 | config UP_LATE_INIT |
| 930 | def_bool y |
Thomas Gleixner | ba360f887 | 2015-01-24 10:34:46 +0100 | [diff] [blame] | 931 | depends on !SMP && X86_LOCAL_APIC |
Thomas Gleixner | 30b8b00 | 2015-01-15 21:22:39 +0000 | [diff] [blame] | 932 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 933 | config X86_UP_APIC |
Jan Beulich | 50849ee | 2015-02-05 15:31:56 +0000 | [diff] [blame] | 934 | bool "Local APIC support on uniprocessors" if !PCI_MSI |
| 935 | default PCI_MSI |
Bryan O'Donoghue | 38a1dfd | 2015-01-22 22:58:49 +0000 | [diff] [blame] | 936 | depends on X86_32 && !SMP && !X86_32_NON_STANDARD |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 937 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 938 | A local APIC (Advanced Programmable Interrupt Controller) is an |
| 939 | integrated interrupt controller in the CPU. If you have a single-CPU |
| 940 | system which has a processor with a local APIC, you can say Y here to |
| 941 | enable and use it. If you say Y here even though your machine doesn't |
| 942 | have a local APIC, then the kernel will still run with no slowdown at |
| 943 | all. The local APIC supports CPU-generated self-interrupts (timer, |
| 944 | performance counters), and the NMI watchdog which detects hard |
| 945 | lockups. |
| 946 | |
| 947 | config X86_UP_IOAPIC |
| 948 | bool "IO-APIC support on uniprocessors" |
| 949 | depends on X86_UP_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 950 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 951 | An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an |
| 952 | SMP-capable replacement for PC-style interrupt controllers. Most |
| 953 | SMP systems and many recent uniprocessor systems have one. |
| 954 | |
| 955 | If you have a single-CPU system with an IO-APIC, you can say Y here |
| 956 | to use it. If you say Y here even though your machine doesn't have |
| 957 | an IO-APIC, then the kernel will still run with no slowdown at all. |
| 958 | |
| 959 | config X86_LOCAL_APIC |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 960 | def_bool y |
Thomas Petazzoni | 0dbc607 | 2013-10-03 11:59:14 +0200 | [diff] [blame] | 961 | depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI |
Jiang Liu | b5dc8e6 | 2015-04-13 14:11:24 +0800 | [diff] [blame] | 962 | select IRQ_DOMAIN_HIERARCHY |
Jiang Liu | 52f518a | 2015-04-13 14:11:35 +0800 | [diff] [blame] | 963 | select PCI_MSI_IRQ_DOMAIN if PCI_MSI |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 964 | |
| 965 | config X86_IO_APIC |
Jan Beulich | b1da1e7 | 2015-02-05 15:35:21 +0000 | [diff] [blame] | 966 | def_bool y |
| 967 | depends on X86_LOCAL_APIC || X86_UP_IOAPIC |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 968 | |
Stefan Assmann | 41b9eb2 | 2008-07-15 13:48:55 +0200 | [diff] [blame] | 969 | config X86_REROUTE_FOR_BROKEN_BOOT_IRQS |
| 970 | bool "Reroute for broken boot IRQs" |
Stefan Assmann | 41b9eb2 | 2008-07-15 13:48:55 +0200 | [diff] [blame] | 971 | depends on X86_IO_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 972 | ---help--- |
Stefan Assmann | 41b9eb2 | 2008-07-15 13:48:55 +0200 | [diff] [blame] | 973 | This option enables a workaround that fixes a source of |
| 974 | spurious interrupts. This is recommended when threaded |
| 975 | interrupt handling is used on systems where the generation of |
| 976 | superfluous "boot interrupts" cannot be disabled. |
| 977 | |
| 978 | Some chipsets generate a legacy INTx "boot IRQ" when the IRQ |
| 979 | entry in the chipset's IO-APIC is masked (as, e.g. the RT |
| 980 | kernel does during interrupt handling). On chipsets where this |
| 981 | boot IRQ generation cannot be disabled, this workaround keeps |
| 982 | the original IRQ line masked so that only the equivalent "boot |
| 983 | IRQ" is delivered to the CPUs. The workaround also tells the |
| 984 | kernel to set up the IRQ handler on the boot IRQ line. In this |
| 985 | way only one interrupt is delivered to the kernel. Otherwise |
| 986 | the spurious second interrupt may cause the kernel to bring |
| 987 | down (vital) interrupt lines. |
| 988 | |
| 989 | Only affects "broken" chipsets. Interrupt sharing may be |
| 990 | increased on these systems. |
| 991 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 992 | config X86_MCE |
Andi Kleen | bab9bc6 | 2009-07-09 00:31:38 +0200 | [diff] [blame] | 993 | bool "Machine Check / overheating reporting" |
Chen, Gong | 648ed94 | 2015-08-12 18:29:34 +0200 | [diff] [blame] | 994 | select GENERIC_ALLOCATOR |
Borislav Petkov | e57dbaf | 2011-09-13 15:23:21 +0200 | [diff] [blame] | 995 | default y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 996 | ---help--- |
Andi Kleen | bab9bc6 | 2009-07-09 00:31:38 +0200 | [diff] [blame] | 997 | Machine Check support allows the processor to notify the |
| 998 | kernel if it detects a problem (e.g. overheating, data corruption). |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 999 | The action the kernel takes depends on the severity of the problem, |
Andi Kleen | bab9bc6 | 2009-07-09 00:31:38 +0200 | [diff] [blame] | 1000 | ranging from warning messages to halting the machine. |
Andi Kleen | 4efc067 | 2009-04-28 19:07:31 +0200 | [diff] [blame] | 1001 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1002 | config X86_MCE_INTEL |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1003 | def_bool y |
| 1004 | prompt "Intel MCE features" |
Andi Kleen | c1ebf83 | 2009-07-09 00:31:41 +0200 | [diff] [blame] | 1005 | depends on X86_MCE && X86_LOCAL_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1006 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1007 | Additional support for intel specific MCE features such as |
| 1008 | the thermal monitor. |
| 1009 | |
| 1010 | config X86_MCE_AMD |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1011 | def_bool y |
| 1012 | prompt "AMD MCE features" |
Andi Kleen | c1ebf83 | 2009-07-09 00:31:41 +0200 | [diff] [blame] | 1013 | depends on X86_MCE && X86_LOCAL_APIC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1014 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1015 | Additional support for AMD specific MCE features such as |
| 1016 | the DRAM Error Threshold. |
| 1017 | |
Andi Kleen | 4efc067 | 2009-04-28 19:07:31 +0200 | [diff] [blame] | 1018 | config X86_ANCIENT_MCE |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 1019 | bool "Support for old Pentium 5 / WinChip machine checks" |
Andi Kleen | c31d963 | 2009-07-09 00:31:37 +0200 | [diff] [blame] | 1020 | depends on X86_32 && X86_MCE |
Hidetoshi Seto | cd13adcc | 2009-05-27 16:57:31 +0900 | [diff] [blame] | 1021 | ---help--- |
| 1022 | Include support for machine check handling on old Pentium 5 or WinChip |
Masanari Iida | 5065a70 | 2013-11-30 21:38:43 +0900 | [diff] [blame] | 1023 | systems. These typically need to be enabled explicitly on the command |
Hidetoshi Seto | cd13adcc | 2009-05-27 16:57:31 +0900 | [diff] [blame] | 1024 | line. |
Andi Kleen | 4efc067 | 2009-04-28 19:07:31 +0200 | [diff] [blame] | 1025 | |
Andi Kleen | b276268 | 2009-02-12 13:49:31 +0100 | [diff] [blame] | 1026 | config X86_MCE_THRESHOLD |
| 1027 | depends on X86_MCE_AMD || X86_MCE_INTEL |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 1028 | def_bool y |
Andi Kleen | b276268 | 2009-02-12 13:49:31 +0100 | [diff] [blame] | 1029 | |
Andi Kleen | ea149b3 | 2009-04-29 19:31:00 +0200 | [diff] [blame] | 1030 | config X86_MCE_INJECT |
Andi Kleen | c1ebf83 | 2009-07-09 00:31:41 +0200 | [diff] [blame] | 1031 | depends on X86_MCE |
Andi Kleen | ea149b3 | 2009-04-29 19:31:00 +0200 | [diff] [blame] | 1032 | tristate "Machine check injector support" |
| 1033 | ---help--- |
| 1034 | Provide support for injecting machine checks for testing purposes. |
| 1035 | If you don't know what a machine check is and you don't do kernel |
| 1036 | QA it is safe to say n. |
| 1037 | |
Andi Kleen | 4efc067 | 2009-04-28 19:07:31 +0200 | [diff] [blame] | 1038 | config X86_THERMAL_VECTOR |
| 1039 | def_bool y |
Andi Kleen | 5bb38ad | 2009-07-09 00:31:39 +0200 | [diff] [blame] | 1040 | depends on X86_MCE_INTEL |
Andi Kleen | 4efc067 | 2009-04-28 19:07:31 +0200 | [diff] [blame] | 1041 | |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1042 | config X86_LEGACY_VM86 |
Ingo Molnar | 1e64281 | 2015-09-05 08:58:10 +0200 | [diff] [blame] | 1043 | bool "Legacy VM86 support" |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1044 | default n |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1045 | depends on X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1046 | ---help--- |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1047 | This option allows user programs to put the CPU into V8086 |
| 1048 | mode, which is an 80286-era approximation of 16-bit real mode. |
| 1049 | |
| 1050 | Some very old versions of X and/or vbetool require this option |
| 1051 | for user mode setting. Similarly, DOSEMU will use it if |
| 1052 | available to accelerate real mode DOS programs. However, any |
| 1053 | recent version of DOSEMU, X, or vbetool should be fully |
| 1054 | functional even without kernel VM86 support, as they will all |
Ingo Molnar | 1e64281 | 2015-09-05 08:58:10 +0200 | [diff] [blame] | 1055 | fall back to software emulation. Nevertheless, if you are using |
| 1056 | a 16-bit DOS program where 16-bit performance matters, vm86 |
| 1057 | mode might be faster than emulation and you might want to |
| 1058 | enable this option. |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1059 | |
Ingo Molnar | 1e64281 | 2015-09-05 08:58:10 +0200 | [diff] [blame] | 1060 | Note that any app that works on a 64-bit kernel is unlikely to |
| 1061 | need this option, as 64-bit kernels don't, and can't, support |
| 1062 | V8086 mode. This option is also unrelated to 16-bit protected |
| 1063 | mode and is not needed to run most 16-bit programs under Wine. |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1064 | |
Ingo Molnar | 1e64281 | 2015-09-05 08:58:10 +0200 | [diff] [blame] | 1065 | Enabling this option increases the complexity of the kernel |
| 1066 | and slows down exception handling a tiny bit. |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1067 | |
Ingo Molnar | 1e64281 | 2015-09-05 08:58:10 +0200 | [diff] [blame] | 1068 | If unsure, say N here. |
Andy Lutomirski | 5aef51c | 2015-07-10 08:34:23 -0700 | [diff] [blame] | 1069 | |
| 1070 | config VM86 |
| 1071 | bool |
| 1072 | default X86_LEGACY_VM86 |
H. Peter Anvin | 34273f4 | 2014-05-04 10:36:22 -0700 | [diff] [blame] | 1073 | |
| 1074 | config X86_16BIT |
| 1075 | bool "Enable support for 16-bit segments" if EXPERT |
| 1076 | default y |
Andy Lutomirski | a5b9e5a | 2015-07-30 14:31:34 -0700 | [diff] [blame] | 1077 | depends on MODIFY_LDT_SYSCALL |
H. Peter Anvin | 34273f4 | 2014-05-04 10:36:22 -0700 | [diff] [blame] | 1078 | ---help--- |
| 1079 | This option is required by programs like Wine to run 16-bit |
| 1080 | protected mode legacy code on x86 processors. Disabling |
| 1081 | this option saves about 300 bytes on i386, or around 6K text |
| 1082 | plus 16K runtime memory on x86-64, |
| 1083 | |
| 1084 | config X86_ESPFIX32 |
| 1085 | def_bool y |
| 1086 | depends on X86_16BIT && X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1087 | |
H. Peter Anvin | 197725d | 2014-05-04 10:00:49 -0700 | [diff] [blame] | 1088 | config X86_ESPFIX64 |
| 1089 | def_bool y |
H. Peter Anvin | 34273f4 | 2014-05-04 10:36:22 -0700 | [diff] [blame] | 1090 | depends on X86_16BIT && X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1091 | |
Andy Lutomirski | 1ad83c8 | 2014-10-29 14:33:47 -0700 | [diff] [blame] | 1092 | config X86_VSYSCALL_EMULATION |
| 1093 | bool "Enable vsyscall emulation" if EXPERT |
| 1094 | default y |
| 1095 | depends on X86_64 |
| 1096 | ---help--- |
| 1097 | This enables emulation of the legacy vsyscall page. Disabling |
| 1098 | it is roughly equivalent to booting with vsyscall=none, except |
| 1099 | that it will also disable the helpful warning if a program |
| 1100 | tries to use a vsyscall. With this option set to N, offending |
| 1101 | programs will just segfault, citing addresses of the form |
| 1102 | 0xffffffffff600?00. |
| 1103 | |
| 1104 | This option is required by many programs built before 2013, and |
| 1105 | care should be used even with newer programs if set to N. |
| 1106 | |
| 1107 | Disabling this option saves about 7K of kernel size and |
| 1108 | possibly 4K of additional runtime pagetable memory. |
| 1109 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1110 | config TOSHIBA |
| 1111 | tristate "Toshiba Laptop support" |
| 1112 | depends on X86_32 |
| 1113 | ---help--- |
| 1114 | This adds a driver to safely access the System Management Mode of |
| 1115 | the CPU on Toshiba portables with a genuine Toshiba BIOS. It does |
| 1116 | not work on models with a Phoenix BIOS. The System Management Mode |
| 1117 | is used to set the BIOS and power saving options on Toshiba portables. |
| 1118 | |
| 1119 | For information on utilities to make use of this driver see the |
| 1120 | Toshiba Linux utilities web site at: |
| 1121 | <http://www.buzzard.org.uk/toshiba/>. |
| 1122 | |
| 1123 | Say Y if you intend to run this kernel on a Toshiba portable. |
| 1124 | Say N otherwise. |
| 1125 | |
| 1126 | config I8K |
Pali Rohár | 039ae58 | 2015-05-14 13:16:37 +0200 | [diff] [blame] | 1127 | tristate "Dell i8k legacy laptop support" |
Jean Delvare | 949a9d7 | 2011-05-25 20:43:33 +0200 | [diff] [blame] | 1128 | select HWMON |
Pali Rohár | 039ae58 | 2015-05-14 13:16:37 +0200 | [diff] [blame] | 1129 | select SENSORS_DELL_SMM |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1130 | ---help--- |
Pali Rohár | 039ae58 | 2015-05-14 13:16:37 +0200 | [diff] [blame] | 1131 | This option enables legacy /proc/i8k userspace interface in hwmon |
| 1132 | dell-smm-hwmon driver. Character file /proc/i8k reports bios version, |
| 1133 | temperature and allows controlling fan speeds of Dell laptops via |
| 1134 | System Management Mode. For old Dell laptops (like Dell Inspiron 8000) |
| 1135 | it reports also power and hotkey status. For fan speed control is |
| 1136 | needed userspace package i8kutils. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1137 | |
Pali Rohár | 039ae58 | 2015-05-14 13:16:37 +0200 | [diff] [blame] | 1138 | Say Y if you intend to run this kernel on old Dell laptops or want to |
| 1139 | use userspace package i8kutils. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1140 | Say N otherwise. |
| 1141 | |
| 1142 | config X86_REBOOTFIXUPS |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 1143 | bool "Enable X86 board specific fixups for reboot" |
| 1144 | depends on X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1145 | ---help--- |
| 1146 | This enables chipset and/or board specific fixups to be done |
| 1147 | in order to get reboot to work correctly. This is only needed on |
| 1148 | some combinations of hardware and BIOS. The symptom, for which |
| 1149 | this config is intended, is when reboot ends with a stalled/hung |
| 1150 | system. |
| 1151 | |
| 1152 | Currently, the only fixup is for the Geode machines using |
Florian Fainelli | 5e3a77e | 2008-01-30 13:33:36 +0100 | [diff] [blame] | 1153 | CS5530A and CS5536 chipsets and the RDC R-321x SoC. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1154 | |
| 1155 | Say Y if you want to enable the fixup. Currently, it's safe to |
| 1156 | enable this option even if you don't need it. |
| 1157 | Say N otherwise. |
| 1158 | |
| 1159 | config MICROCODE |
Borislav Petkov | 9a2bc33 | 2015-10-20 11:54:44 +0200 | [diff] [blame] | 1160 | bool "CPU microcode loading support" |
| 1161 | default y |
Borislav Petkov | 80030e3 | 2013-10-13 18:36:29 +0200 | [diff] [blame] | 1162 | depends on CPU_SUP_AMD || CPU_SUP_INTEL |
Borislav Petkov | fe05589 | 2015-10-20 11:54:45 +0200 | [diff] [blame] | 1163 | depends on BLK_DEV_INITRD |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1164 | select FW_LOADER |
| 1165 | ---help--- |
Borislav Petkov | e43f6e6 | 2012-08-01 19:17:01 +0200 | [diff] [blame] | 1166 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1167 | If you say Y here, you will be able to update the microcode on |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 1168 | certain Intel and AMD processors. The Intel support is for the |
Borislav Petkov | e43f6e6 | 2012-08-01 19:17:01 +0200 | [diff] [blame] | 1169 | IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, Pentium 4, |
| 1170 | Xeon etc. The AMD support is for families 0x10 and later. You will |
| 1171 | obviously need the actual microcode binary data itself which is not |
| 1172 | shipped with the Linux kernel. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1173 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 1174 | This option selects the general module only, you need to select |
| 1175 | at least one vendor specific module as well. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1176 | |
Borislav Petkov | e43f6e6 | 2012-08-01 19:17:01 +0200 | [diff] [blame] | 1177 | To compile this driver as a module, choose M here: the module |
| 1178 | will be called microcode. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1179 | |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 1180 | config MICROCODE_INTEL |
Borislav Petkov | e43f6e6 | 2012-08-01 19:17:01 +0200 | [diff] [blame] | 1181 | bool "Intel microcode loading support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1182 | depends on MICROCODE |
| 1183 | default MICROCODE |
| 1184 | select FW_LOADER |
| 1185 | ---help--- |
| 1186 | This options enables microcode patch loading support for Intel |
| 1187 | processors. |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 1188 | |
Alan | b8989db | 2014-01-20 18:01:56 +0000 | [diff] [blame] | 1189 | For the current Intel microcode data package go to |
| 1190 | <https://downloadcenter.intel.com> and search for |
| 1191 | 'Linux Processor Microcode Data File'. |
Peter Oruba | 8d86f39 | 2008-07-28 18:44:21 +0200 | [diff] [blame] | 1192 | |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 1193 | config MICROCODE_AMD |
Borislav Petkov | e43f6e6 | 2012-08-01 19:17:01 +0200 | [diff] [blame] | 1194 | bool "AMD microcode loading support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1195 | depends on MICROCODE |
| 1196 | select FW_LOADER |
| 1197 | ---help--- |
| 1198 | If you select this option, microcode patch loading support for AMD |
| 1199 | processors will be enabled. |
Peter Oruba | 80cc9f1 | 2008-07-28 18:44:22 +0200 | [diff] [blame] | 1200 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1201 | config MICROCODE_OLD_INTERFACE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1202 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1203 | depends on MICROCODE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1204 | |
| 1205 | config X86_MSR |
| 1206 | tristate "/dev/cpu/*/msr - Model-specific register support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1207 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1208 | This device gives privileged processes access to the x86 |
| 1209 | Model-Specific Registers (MSRs). It is a character device with |
| 1210 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. |
| 1211 | MSR accesses are directed to a specific CPU on multi-processor |
| 1212 | systems. |
| 1213 | |
| 1214 | config X86_CPUID |
| 1215 | tristate "/dev/cpu/*/cpuid - CPU information support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1216 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1217 | This device gives processes access to the x86 CPUID instruction to |
| 1218 | be executed on a specific processor. It is a character device |
| 1219 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to |
| 1220 | /dev/cpu/31/cpuid. |
| 1221 | |
| 1222 | choice |
| 1223 | prompt "High Memory Support" |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 1224 | default HIGHMEM4G |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1225 | depends on X86_32 |
| 1226 | |
| 1227 | config NOHIGHMEM |
| 1228 | bool "off" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1229 | ---help--- |
| 1230 | Linux can use up to 64 Gigabytes of physical memory on x86 systems. |
| 1231 | However, the address space of 32-bit x86 processors is only 4 |
| 1232 | Gigabytes large. That means that, if you have a large amount of |
| 1233 | physical memory, not all of it can be "permanently mapped" by the |
| 1234 | kernel. The physical memory that's not permanently mapped is called |
| 1235 | "high memory". |
| 1236 | |
| 1237 | If you are compiling a kernel which will never run on a machine with |
| 1238 | more than 1 Gigabyte total physical RAM, answer "off" here (default |
| 1239 | choice and suitable for most users). This will result in a "3GB/1GB" |
| 1240 | split: 3GB are mapped so that each process sees a 3GB virtual memory |
| 1241 | space and the remaining part of the 4GB virtual memory space is used |
| 1242 | by the kernel to permanently map as much physical memory as |
| 1243 | possible. |
| 1244 | |
| 1245 | If the machine has between 1 and 4 Gigabytes physical RAM, then |
| 1246 | answer "4GB" here. |
| 1247 | |
| 1248 | If more than 4 Gigabytes is used then answer "64GB" here. This |
| 1249 | selection turns Intel PAE (Physical Address Extension) mode on. |
| 1250 | PAE implements 3-level paging on IA32 processors. PAE is fully |
| 1251 | supported by Linux, PAE mode is implemented on all recent Intel |
| 1252 | processors (Pentium Pro and better). NOTE: If you say "64GB" here, |
| 1253 | then the kernel will not boot on CPUs that don't support PAE! |
| 1254 | |
| 1255 | The actual amount of total physical memory will either be |
| 1256 | auto detected or can be forced by using a kernel command line option |
| 1257 | such as "mem=256M". (Try "man bootparam" or see the documentation of |
| 1258 | your boot loader (lilo or loadlin) about how to pass options to the |
| 1259 | kernel at boot time.) |
| 1260 | |
| 1261 | If unsure, say "off". |
| 1262 | |
| 1263 | config HIGHMEM4G |
| 1264 | bool "4GB" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1265 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1266 | Select this if you have a 32-bit processor and between 1 and 4 |
| 1267 | gigabytes of physical RAM. |
| 1268 | |
| 1269 | config HIGHMEM64G |
| 1270 | bool "64GB" |
H. Peter Anvin | eb068e7 | 2012-11-28 11:50:23 -0800 | [diff] [blame] | 1271 | depends on !M486 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1272 | select X86_PAE |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1273 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1274 | Select this if you have a 32-bit processor and more than 4 |
| 1275 | gigabytes of physical RAM. |
| 1276 | |
| 1277 | endchoice |
| 1278 | |
| 1279 | choice |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 1280 | prompt "Memory split" if EXPERT |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1281 | default VMSPLIT_3G |
| 1282 | depends on X86_32 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1283 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1284 | Select the desired split between kernel and user memory. |
| 1285 | |
| 1286 | If the address range available to the kernel is less than the |
| 1287 | physical memory installed, the remaining memory will be available |
| 1288 | as "high memory". Accessing high memory is a little more costly |
| 1289 | than low memory, as it needs to be mapped into the kernel first. |
| 1290 | Note that increasing the kernel address space limits the range |
| 1291 | available to user programs, making the address space there |
| 1292 | tighter. Selecting anything other than the default 3G/1G split |
| 1293 | will also likely make your kernel incompatible with binary-only |
| 1294 | kernel modules. |
| 1295 | |
| 1296 | If you are not absolutely sure what you are doing, leave this |
| 1297 | option alone! |
| 1298 | |
| 1299 | config VMSPLIT_3G |
| 1300 | bool "3G/1G user/kernel split" |
| 1301 | config VMSPLIT_3G_OPT |
| 1302 | depends on !X86_PAE |
| 1303 | bool "3G/1G user/kernel split (for full 1G low memory)" |
| 1304 | config VMSPLIT_2G |
| 1305 | bool "2G/2G user/kernel split" |
| 1306 | config VMSPLIT_2G_OPT |
| 1307 | depends on !X86_PAE |
| 1308 | bool "2G/2G user/kernel split (for full 2G low memory)" |
| 1309 | config VMSPLIT_1G |
| 1310 | bool "1G/3G user/kernel split" |
| 1311 | endchoice |
| 1312 | |
| 1313 | config PAGE_OFFSET |
| 1314 | hex |
| 1315 | default 0xB0000000 if VMSPLIT_3G_OPT |
| 1316 | default 0x80000000 if VMSPLIT_2G |
| 1317 | default 0x78000000 if VMSPLIT_2G_OPT |
| 1318 | default 0x40000000 if VMSPLIT_1G |
| 1319 | default 0xC0000000 |
| 1320 | depends on X86_32 |
| 1321 | |
| 1322 | config HIGHMEM |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1323 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1324 | depends on X86_32 && (HIGHMEM64G || HIGHMEM4G) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1325 | |
| 1326 | config X86_PAE |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 1327 | bool "PAE (Physical Address Extension) Support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1328 | depends on X86_32 && !HIGHMEM4G |
Christian Melki | 9d99c71 | 2015-10-05 17:31:33 +0200 | [diff] [blame] | 1329 | select SWIOTLB |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1330 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1331 | PAE is required for NX support, and furthermore enables |
| 1332 | larger swapspace support for non-overcommit purposes. It |
| 1333 | has the cost of more pagetable lookup overhead, and also |
| 1334 | consumes more pagetable space per process. |
| 1335 | |
Jeremy Fitzhardinge | 600715d | 2008-09-11 01:31:45 -0700 | [diff] [blame] | 1336 | config ARCH_PHYS_ADDR_T_64BIT |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 1337 | def_bool y |
| 1338 | depends on X86_64 || X86_PAE |
Jeremy Fitzhardinge | 600715d | 2008-09-11 01:31:45 -0700 | [diff] [blame] | 1339 | |
FUJITA Tomonori | 66f2b06 | 2010-10-20 15:55:35 -0700 | [diff] [blame] | 1340 | config ARCH_DMA_ADDR_T_64BIT |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 1341 | def_bool y |
| 1342 | depends on X86_64 || HIGHMEM64G |
FUJITA Tomonori | 66f2b06 | 2010-10-20 15:55:35 -0700 | [diff] [blame] | 1343 | |
Ingo Molnar | 10971ab | 2015-03-05 08:18:23 +0100 | [diff] [blame] | 1344 | config X86_DIRECT_GBPAGES |
Luis R. Rodriguez | e5008ab | 2015-03-04 17:24:12 -0800 | [diff] [blame] | 1345 | def_bool y |
| 1346 | depends on X86_64 && !DEBUG_PAGEALLOC && !KMEMCHECK |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1347 | ---help--- |
Ingo Molnar | 10971ab | 2015-03-05 08:18:23 +0100 | [diff] [blame] | 1348 | Certain kernel features effectively disable kernel |
| 1349 | linear 1 GB mappings (even if the CPU otherwise |
| 1350 | supports them), so don't confuse the user by printing |
| 1351 | that we have them enabled. |
Nick Piggin | 9e89981 | 2008-10-22 12:33:16 +0200 | [diff] [blame] | 1352 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1353 | # Common NUMA Features |
| 1354 | config NUMA |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1355 | bool "Numa Memory Allocation and Scheduler Support" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1356 | depends on SMP |
H. Peter Anvin | b5660ba | 2014-02-25 12:14:06 -0800 | [diff] [blame] | 1357 | depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP) |
| 1358 | default y if X86_BIGSMP |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1359 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1360 | Enable NUMA (Non Uniform Memory Access) support. |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1361 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1362 | The kernel will try to allocate memory used by a CPU on the |
| 1363 | local memory controller of the CPU and add some more |
| 1364 | NUMA awareness to the kernel. |
| 1365 | |
Ingo Molnar | c280ea5 | 2008-11-08 13:29:45 +0100 | [diff] [blame] | 1366 | For 64-bit this is recommended if the system is Intel Core i7 |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1367 | (or later), AMD Opteron, or EM64T NUMA. |
| 1368 | |
H. Peter Anvin | b5660ba | 2014-02-25 12:14:06 -0800 | [diff] [blame] | 1369 | For 32-bit this is only needed if you boot a 32-bit |
David Rientjes | 7cf6c94 | 2014-02-11 18:11:13 -0800 | [diff] [blame] | 1370 | kernel on a 64-bit NUMA platform. |
KOSAKI Motohiro | fd51b2d | 2008-11-05 02:27:19 +0900 | [diff] [blame] | 1371 | |
| 1372 | Otherwise, you should say N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1373 | |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame] | 1374 | config AMD_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1375 | def_bool y |
| 1376 | prompt "Old style AMD Opteron NUMA detection" |
Tejun Heo | 5da0ef9 | 2011-07-11 10:34:32 +0200 | [diff] [blame] | 1377 | depends on X86_64 && NUMA && PCI |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1378 | ---help--- |
Hans Rosenfeld | eec1d4f | 2010-10-29 17:14:30 +0200 | [diff] [blame] | 1379 | Enable AMD NUMA node topology detection. You should say Y here if |
| 1380 | you have a multi processor AMD system. This uses an old method to |
| 1381 | read the NUMA configuration directly from the builtin Northbridge |
| 1382 | of Opteron. It is recommended to use X86_64_ACPI_NUMA instead, |
| 1383 | which also takes priority if both are compiled in. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1384 | |
| 1385 | config X86_64_ACPI_NUMA |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1386 | def_bool y |
| 1387 | prompt "ACPI NUMA detection" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1388 | depends on X86_64 && NUMA && ACPI && PCI |
| 1389 | select ACPI_NUMA |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1390 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1391 | Enable ACPI SRAT based node topology detection. |
| 1392 | |
Suresh Siddha | 6ec6e0d | 2008-03-25 10:14:35 -0700 | [diff] [blame] | 1393 | # Some NUMA nodes have memory ranges that span |
| 1394 | # other nodes. Even though a pfn is valid and |
| 1395 | # between a node's start and end pfns, it may not |
| 1396 | # reside on that node. See memmap_init_zone() |
| 1397 | # for details. |
| 1398 | config NODES_SPAN_OTHER_NODES |
| 1399 | def_bool y |
| 1400 | depends on X86_64_ACPI_NUMA |
| 1401 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1402 | config NUMA_EMU |
| 1403 | bool "NUMA emulation" |
Tejun Heo | 1b7e03e | 2011-05-02 17:24:48 +0200 | [diff] [blame] | 1404 | depends on NUMA |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1405 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1406 | Enable NUMA emulation. A flat machine will be split |
| 1407 | into virtual nodes when booted with "numa=fake=N", where N is the |
| 1408 | number of nodes. This is only useful for debugging. |
| 1409 | |
| 1410 | config NODES_SHIFT |
Linus Torvalds | d25e26b | 2008-08-25 14:15:38 -0700 | [diff] [blame] | 1411 | int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP |
David Rientjes | 51591e3 | 2010-03-25 15:39:27 -0700 | [diff] [blame] | 1412 | range 1 10 |
| 1413 | default "10" if MAXSMP |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1414 | default "6" if X86_64 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1415 | default "3" |
| 1416 | depends on NEED_MULTIPLE_NODES |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1417 | ---help--- |
Mike Travis | 1184dc2 | 2008-05-12 21:21:12 +0200 | [diff] [blame] | 1418 | Specify the maximum number of NUMA Nodes available on the target |
Matt LaPlante | 692105b | 2009-01-26 11:12:25 +0100 | [diff] [blame] | 1419 | system. Increases memory reserved to accommodate various tables. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1420 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1421 | config ARCH_HAVE_MEMORY_PRESENT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1422 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1423 | depends on X86_32 && DISCONTIGMEM |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1424 | |
| 1425 | config NEED_NODE_MEMMAP_SIZE |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1426 | def_bool y |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1427 | depends on X86_32 && (DISCONTIGMEM || SPARSEMEM) |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1428 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1429 | config ARCH_FLATMEM_ENABLE |
| 1430 | def_bool y |
Tejun Heo | 3b16651 | 2011-04-01 11:15:12 +0200 | [diff] [blame] | 1431 | depends on X86_32 && !NUMA |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1432 | |
| 1433 | config ARCH_DISCONTIGMEM_ENABLE |
| 1434 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1435 | depends on NUMA && X86_32 |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1436 | |
| 1437 | config ARCH_DISCONTIGMEM_DEFAULT |
| 1438 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1439 | depends on NUMA && X86_32 |
| 1440 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1441 | config ARCH_SPARSEMEM_ENABLE |
| 1442 | def_bool y |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 1443 | depends on X86_64 || NUMA || X86_32 || X86_32_NON_STANDARD |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1444 | select SPARSEMEM_STATIC if X86_32 |
| 1445 | select SPARSEMEM_VMEMMAP_ENABLE if X86_64 |
| 1446 | |
Tejun Heo | 3b16651 | 2011-04-01 11:15:12 +0200 | [diff] [blame] | 1447 | config ARCH_SPARSEMEM_DEFAULT |
| 1448 | def_bool y |
| 1449 | depends on X86_64 |
| 1450 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1451 | config ARCH_SELECT_MEMORY_MODEL |
| 1452 | def_bool y |
Christoph Lameter | b263295 | 2008-01-30 13:30:47 +0100 | [diff] [blame] | 1453 | depends on ARCH_SPARSEMEM_ENABLE |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1454 | |
| 1455 | config ARCH_MEMORY_PROBE |
Toshi Kani | a0842b7 | 2013-07-19 11:47:48 -0600 | [diff] [blame] | 1456 | bool "Enable sysfs memory/probe interface" |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 1457 | depends on X86_64 && MEMORY_HOTPLUG |
Toshi Kani | a0842b7 | 2013-07-19 11:47:48 -0600 | [diff] [blame] | 1458 | help |
| 1459 | This option enables a sysfs memory/probe interface for testing. |
| 1460 | See Documentation/memory-hotplug.txt for more information. |
| 1461 | If you are unsure how to answer this question, answer N. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1462 | |
Tejun Heo | 3b16651 | 2011-04-01 11:15:12 +0200 | [diff] [blame] | 1463 | config ARCH_PROC_KCORE_TEXT |
| 1464 | def_bool y |
| 1465 | depends on X86_64 && PROC_KCORE |
| 1466 | |
Avi Kivity | a29815a | 2010-01-10 16:28:09 +0200 | [diff] [blame] | 1467 | config ILLEGAL_POINTER_VALUE |
| 1468 | hex |
| 1469 | default 0 if X86_32 |
| 1470 | default 0xdead000000000000 if X86_64 |
| 1471 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1472 | source "mm/Kconfig" |
| 1473 | |
Dan Williams | 7a67832 | 2015-08-19 00:34:34 -0400 | [diff] [blame] | 1474 | config X86_PMEM_LEGACY_DEVICE |
| 1475 | bool |
| 1476 | |
Christoph Hellwig | ec776ef | 2015-04-01 09:12:18 +0200 | [diff] [blame] | 1477 | config X86_PMEM_LEGACY |
Dan Williams | 7a67832 | 2015-08-19 00:34:34 -0400 | [diff] [blame] | 1478 | tristate "Support non-standard NVDIMMs and ADR protected memory" |
Dan Williams | 9f53f9f | 2015-06-09 15:33:45 -0400 | [diff] [blame] | 1479 | depends on PHYS_ADDR_T_64BIT |
| 1480 | depends on BLK_DEV |
Dan Williams | 7a67832 | 2015-08-19 00:34:34 -0400 | [diff] [blame] | 1481 | select X86_PMEM_LEGACY_DEVICE |
Dan Williams | 9f53f9f | 2015-06-09 15:33:45 -0400 | [diff] [blame] | 1482 | select LIBNVDIMM |
Christoph Hellwig | ec776ef | 2015-04-01 09:12:18 +0200 | [diff] [blame] | 1483 | help |
| 1484 | Treat memory marked using the non-standard e820 type of 12 as used |
| 1485 | by the Intel Sandy Bridge-EP reference BIOS as protected memory. |
| 1486 | The kernel will offer these regions to the 'pmem' driver so |
| 1487 | they can be used for persistent storage. |
| 1488 | |
| 1489 | Say Y if unsure. |
| 1490 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1491 | config HIGHPTE |
| 1492 | bool "Allocate 3rd-level pagetables from highmem" |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 1493 | depends on HIGHMEM |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1494 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1495 | The VM uses one page table entry for each page of physical memory. |
| 1496 | For systems with a lot of RAM, this can be wasteful of precious |
| 1497 | low memory. Setting this option will put user-space page table |
| 1498 | entries in high memory. |
| 1499 | |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1500 | config X86_CHECK_BIOS_CORRUPTION |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1501 | bool "Check for low memory corruption" |
| 1502 | ---help--- |
| 1503 | Periodically check for memory corruption in low memory, which |
| 1504 | is suspected to be caused by BIOS. Even when enabled in the |
| 1505 | configuration, it is disabled at runtime. Enable it by |
| 1506 | setting "memory_corruption_check=1" on the kernel command |
| 1507 | line. By default it scans the low 64k of memory every 60 |
| 1508 | seconds; see the memory_corruption_check_size and |
| 1509 | memory_corruption_check_period parameters in |
| 1510 | Documentation/kernel-parameters.txt to adjust this. |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1511 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1512 | When enabled with the default parameters, this option has |
| 1513 | almost no overhead, as it reserves a relatively small amount |
| 1514 | of memory and scans it infrequently. It both detects corruption |
| 1515 | and prevents it from affecting the running system. |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1516 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1517 | It is, however, intended as a diagnostic tool; if repeatable |
| 1518 | BIOS-originated corruption always affects the same memory, |
| 1519 | you can use memmap= to prevent the kernel from using that |
| 1520 | memory. |
Jeremy Fitzhardinge | 9f07787 | 2008-09-07 01:51:34 -0700 | [diff] [blame] | 1521 | |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1522 | config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1523 | bool "Set the default setting of memory_corruption_check" |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1524 | depends on X86_CHECK_BIOS_CORRUPTION |
| 1525 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1526 | ---help--- |
| 1527 | Set whether the default state of memory_corruption_check is |
| 1528 | on or off. |
Jeremy Fitzhardinge | c885df5 | 2008-09-07 02:37:32 -0700 | [diff] [blame] | 1529 | |
H. Peter Anvin | 9ea77bd | 2010-08-25 16:38:20 -0700 | [diff] [blame] | 1530 | config X86_RESERVE_LOW |
H. Peter Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 1531 | int "Amount of low memory, in kilobytes, to reserve for the BIOS" |
| 1532 | default 64 |
| 1533 | range 4 640 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1534 | ---help--- |
H. Peter Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 1535 | Specify the amount of low memory to reserve for the BIOS. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1536 | |
H. Peter Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 1537 | The first page contains BIOS data structures that the kernel |
| 1538 | must not use, so that page must always be reserved. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1539 | |
H. Peter Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 1540 | By default we reserve the first 64K of physical RAM, as a |
| 1541 | number of BIOSes are known to corrupt that memory range |
| 1542 | during events such as suspend/resume or monitor cable |
| 1543 | insertion, so it must not be used by the kernel. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1544 | |
H. Peter Anvin | d0cd742 | 2010-08-24 17:32:04 -0700 | [diff] [blame] | 1545 | You can set this to 4 if you are absolutely sure that you |
| 1546 | trust the BIOS to get all its memory reservations and usages |
| 1547 | right. If you know your BIOS have problems beyond the |
| 1548 | default 64K area, you can set this to 640 to avoid using the |
| 1549 | entire low memory range. |
| 1550 | |
| 1551 | If you have doubts about the BIOS (e.g. suspend/resume does |
| 1552 | not work or there's kernel crashes after certain hardware |
| 1553 | hotplug events) then you might want to enable |
| 1554 | X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check |
| 1555 | typical corruption patterns. |
| 1556 | |
| 1557 | Leave this to the default value of 64 if you are unsure. |
Ingo Molnar | fc38151 | 2008-09-16 10:07:34 +0200 | [diff] [blame] | 1558 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1559 | config MATH_EMULATION |
| 1560 | bool |
Andy Lutomirski | a5b9e5a | 2015-07-30 14:31:34 -0700 | [diff] [blame] | 1561 | depends on MODIFY_LDT_SYSCALL |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1562 | prompt "Math emulation" if X86_32 |
| 1563 | ---help--- |
| 1564 | Linux can emulate a math coprocessor (used for floating point |
| 1565 | operations) if you don't have one. 486DX and Pentium processors have |
| 1566 | a math coprocessor built in, 486SX and 386 do not, unless you added |
| 1567 | a 487DX or 387, respectively. (The messages during boot time can |
| 1568 | give you some hints here ["man dmesg"].) Everyone needs either a |
| 1569 | coprocessor or this emulation. |
| 1570 | |
| 1571 | If you don't have a math coprocessor, you need to say Y here; if you |
| 1572 | say Y here even though you have a coprocessor, the coprocessor will |
| 1573 | be used nevertheless. (This behavior can be changed with the kernel |
| 1574 | command line option "no387", which comes handy if your coprocessor |
| 1575 | is broken. Try "man bootparam" or see the documentation of your boot |
| 1576 | loader (lilo or loadlin) about how to pass options to the kernel at |
| 1577 | boot time.) This means that it is a good idea to say Y here if you |
| 1578 | intend to use this kernel on different machines. |
| 1579 | |
| 1580 | More information about the internals of the Linux math coprocessor |
| 1581 | emulation can be found in <file:arch/x86/math-emu/README>. |
| 1582 | |
| 1583 | If you are not sure, say Y; apart from resulting in a 66 KB bigger |
| 1584 | kernel, it won't hurt. |
| 1585 | |
| 1586 | config MTRR |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 1587 | def_bool y |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 1588 | prompt "MTRR (Memory Type Range Register) support" if EXPERT |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1589 | ---help--- |
| 1590 | On Intel P6 family processors (Pentium Pro, Pentium II and later) |
| 1591 | the Memory Type Range Registers (MTRRs) may be used to control |
| 1592 | processor access to memory ranges. This is most useful if you have |
| 1593 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining |
| 1594 | allows bus write transfers to be combined into a larger transfer |
| 1595 | before bursting over the PCI/AGP bus. This can increase performance |
| 1596 | of image write operations 2.5 times or more. Saying Y here creates a |
| 1597 | /proc/mtrr file which may be used to manipulate your processor's |
| 1598 | MTRRs. Typically the X server should use this. |
| 1599 | |
| 1600 | This code has a reasonably generic interface so that similar |
| 1601 | control registers on other processors can be easily supported |
| 1602 | as well: |
| 1603 | |
| 1604 | The Cyrix 6x86, 6x86MX and M II processors have Address Range |
| 1605 | Registers (ARRs) which provide a similar functionality to MTRRs. For |
| 1606 | these, the ARRs are used to emulate the MTRRs. |
| 1607 | The AMD K6-2 (stepping 8 and above) and K6-3 processors have two |
| 1608 | MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing |
| 1609 | write-combining. All of these processors are supported by this code |
| 1610 | and it makes sense to say Y here if you have one of them. |
| 1611 | |
| 1612 | Saying Y here also fixes a problem with buggy SMP BIOSes which only |
| 1613 | set the MTRRs for the boot CPU and not for the secondary CPUs. This |
| 1614 | can lead to all sorts of problems, so it's good to say Y here. |
| 1615 | |
| 1616 | You can safely say Y even if your machine doesn't have MTRRs, you'll |
| 1617 | just add about 9 KB to your kernel. |
| 1618 | |
Randy Dunlap | 7225e75 | 2008-07-26 17:54:22 -0700 | [diff] [blame] | 1619 | See <file:Documentation/x86/mtrr.txt> for more information. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1620 | |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1621 | config MTRR_SANITIZER |
Yinghai Lu | 2ffb350 | 2008-09-30 16:29:40 -0700 | [diff] [blame] | 1622 | def_bool y |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1623 | prompt "MTRR cleanup support" |
| 1624 | depends on MTRR |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1625 | ---help--- |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1626 | Convert MTRR layout from continuous to discrete, so X drivers can |
| 1627 | add writeback entries. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1628 | |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1629 | Can be disabled with disable_mtrr_cleanup on the kernel command line. |
Matt LaPlante | 692105b | 2009-01-26 11:12:25 +0100 | [diff] [blame] | 1630 | The largest mtrr entry size for a continuous block can be set with |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1631 | mtrr_chunk_size. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1632 | |
Yinghai Lu | 2ffb350 | 2008-09-30 16:29:40 -0700 | [diff] [blame] | 1633 | If unsure, say Y. |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1634 | |
| 1635 | config MTRR_SANITIZER_ENABLE_DEFAULT |
Yinghai Lu | f5098d6 | 2008-04-29 20:25:58 -0700 | [diff] [blame] | 1636 | int "MTRR cleanup enable value (0-1)" |
| 1637 | range 0 1 |
| 1638 | default "0" |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1639 | depends on MTRR_SANITIZER |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1640 | ---help--- |
Yinghai Lu | f5098d6 | 2008-04-29 20:25:58 -0700 | [diff] [blame] | 1641 | Enable mtrr cleanup default value |
Yinghai Lu | 95ffa24 | 2008-04-29 03:52:33 -0700 | [diff] [blame] | 1642 | |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1643 | config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT |
| 1644 | int "MTRR cleanup spare reg num (0-7)" |
| 1645 | range 0 7 |
| 1646 | default "1" |
| 1647 | depends on MTRR_SANITIZER |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1648 | ---help--- |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1649 | mtrr cleanup spare entries default, it can be changed via |
Thomas Gleixner | aba3728 | 2008-07-15 14:48:48 +0200 | [diff] [blame] | 1650 | mtrr_spare_reg_nr=N on the kernel command line. |
Yinghai Lu | 12031a6 | 2008-05-02 02:40:22 -0700 | [diff] [blame] | 1651 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1652 | config X86_PAT |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 1653 | def_bool y |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 1654 | prompt "x86 PAT support" if EXPERT |
Ingo Molnar | 2a8a271 | 2008-04-26 10:26:52 +0200 | [diff] [blame] | 1655 | depends on MTRR |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1656 | ---help--- |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1657 | Use PAT attributes to setup page level cache control. |
Venki Pallipadi | 042b78e | 2008-03-24 14:22:35 -0700 | [diff] [blame] | 1658 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1659 | PATs are the modern equivalents of MTRRs and are much more |
| 1660 | flexible than MTRRs. |
| 1661 | |
| 1662 | Say N here if you see bootup problems (boot crash, boot hang, |
Venki Pallipadi | 042b78e | 2008-03-24 14:22:35 -0700 | [diff] [blame] | 1663 | spontaneous reboots) or a non-working video driver. |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 1664 | |
| 1665 | If unsure, say Y. |
| 1666 | |
Venkatesh Pallipadi | 46cf98c | 2009-07-10 09:57:37 -0700 | [diff] [blame] | 1667 | config ARCH_USES_PG_UNCACHED |
| 1668 | def_bool y |
| 1669 | depends on X86_PAT |
| 1670 | |
H. Peter Anvin | 628c624 | 2011-07-31 13:59:29 -0700 | [diff] [blame] | 1671 | config ARCH_RANDOM |
| 1672 | def_bool y |
| 1673 | prompt "x86 architectural random number generator" if EXPERT |
| 1674 | ---help--- |
| 1675 | Enable the x86 architectural RDRAND instruction |
| 1676 | (Intel Bull Mountain technology) to generate random numbers. |
| 1677 | If supported, this is a high bandwidth, cryptographically |
| 1678 | secure hardware random number generator. |
| 1679 | |
H. Peter Anvin | 51ae4a2 | 2012-09-21 12:43:10 -0700 | [diff] [blame] | 1680 | config X86_SMAP |
| 1681 | def_bool y |
| 1682 | prompt "Supervisor Mode Access Prevention" if EXPERT |
| 1683 | ---help--- |
| 1684 | Supervisor Mode Access Prevention (SMAP) is a security |
| 1685 | feature in newer Intel processors. There is a small |
| 1686 | performance cost if this enabled and turned on; there is |
| 1687 | also a small increase in the kernel size if this is enabled. |
| 1688 | |
| 1689 | If unsure, say Y. |
| 1690 | |
Dave Hansen | 72e9b5f | 2014-12-12 10:38:36 -0800 | [diff] [blame] | 1691 | config X86_INTEL_MPX |
| 1692 | prompt "Intel MPX (Memory Protection Extensions)" |
| 1693 | def_bool n |
| 1694 | depends on CPU_SUP_INTEL |
| 1695 | ---help--- |
| 1696 | MPX provides hardware features that can be used in |
| 1697 | conjunction with compiler-instrumented code to check |
| 1698 | memory references. It is designed to detect buffer |
| 1699 | overflow or underflow bugs. |
| 1700 | |
| 1701 | This option enables running applications which are |
| 1702 | instrumented or otherwise use MPX. It does not use MPX |
| 1703 | itself inside the kernel or to protect the kernel |
| 1704 | against bad memory references. |
| 1705 | |
| 1706 | Enabling this option will make the kernel larger: |
| 1707 | ~8k of kernel text and 36 bytes of data on a 64-bit |
| 1708 | defconfig. It adds a long to the 'mm_struct' which |
| 1709 | will increase the kernel memory overhead of each |
| 1710 | process and adds some branches to paths used during |
| 1711 | exec() and munmap(). |
| 1712 | |
| 1713 | For details, see Documentation/x86/intel_mpx.txt |
| 1714 | |
| 1715 | If unsure, say N. |
| 1716 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1717 | config EFI |
Jan Beulich | 9ba1608 | 2008-10-15 22:01:38 -0700 | [diff] [blame] | 1718 | bool "EFI runtime service support" |
Huang, Ying | 5b83683 | 2008-01-30 13:31:19 +0100 | [diff] [blame] | 1719 | depends on ACPI |
Sergey Vlasov | f6ce500 | 2013-04-16 18:31:08 +0400 | [diff] [blame] | 1720 | select UCS2_STRING |
Ard Biesheuvel | 022ee6c | 2014-06-26 12:09:05 +0200 | [diff] [blame] | 1721 | select EFI_RUNTIME_WRAPPERS |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1722 | ---help--- |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1723 | This enables the kernel to use EFI runtime services that are |
| 1724 | available (such as the EFI variable services). |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1725 | |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1726 | This option is only useful on systems that have EFI firmware. |
| 1727 | In addition, you should use the latest ELILO loader available |
| 1728 | at <http://elilo.sourceforge.net> in order to take advantage |
| 1729 | of EFI runtime services. However, even with this option, the |
| 1730 | resultant kernel should continue to boot on existing non-EFI |
| 1731 | platforms. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1732 | |
Matt Fleming | 291f363 | 2011-12-12 21:27:52 +0000 | [diff] [blame] | 1733 | config EFI_STUB |
| 1734 | bool "EFI stub support" |
Matt Fleming | b16d8c2 | 2014-08-05 00:12:19 +0100 | [diff] [blame] | 1735 | depends on EFI && !X86_USE_3DNOW |
Matt Fleming | 7b2a583 | 2014-07-11 08:45:25 +0100 | [diff] [blame] | 1736 | select RELOCATABLE |
Matt Fleming | 291f363 | 2011-12-12 21:27:52 +0000 | [diff] [blame] | 1737 | ---help--- |
| 1738 | This kernel feature allows a bzImage to be loaded directly |
| 1739 | by EFI firmware without the use of a bootloader. |
| 1740 | |
Roy Franz | 4172fe2 | 2013-09-22 15:45:25 -0700 | [diff] [blame] | 1741 | See Documentation/efi-stub.txt for more information. |
Matt Fleming | 0c75966 | 2012-03-16 12:03:13 +0000 | [diff] [blame] | 1742 | |
Matt Fleming | 7d453ee | 2014-01-10 18:52:06 +0000 | [diff] [blame] | 1743 | config EFI_MIXED |
| 1744 | bool "EFI mixed-mode support" |
| 1745 | depends on EFI_STUB && X86_64 |
| 1746 | ---help--- |
| 1747 | Enabling this feature allows a 64-bit kernel to be booted |
| 1748 | on a 32-bit firmware, provided that your CPU supports 64-bit |
| 1749 | mode. |
| 1750 | |
| 1751 | Note that it is not possible to boot a mixed-mode enabled |
| 1752 | kernel via the EFI boot stub - a bootloader that supports |
| 1753 | the EFI handover protocol must be used. |
| 1754 | |
| 1755 | If unsure, say N. |
| 1756 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1757 | config SECCOMP |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 1758 | def_bool y |
| 1759 | prompt "Enable seccomp to safely compute untrusted bytecode" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1760 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1761 | This kernel feature is useful for number crunching applications |
| 1762 | that may need to compute untrusted bytecode during their |
| 1763 | execution. By using pipes or other transports made available to |
| 1764 | the process as file descriptors supporting the read/write |
| 1765 | syscalls, it's possible to isolate those applications in |
| 1766 | their own address space using seccomp. Once seccomp is |
Alexey Dobriyan | 9c0bbee | 2008-09-09 11:01:31 +0400 | [diff] [blame] | 1767 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1768 | and the task is only allowed to execute a few safe syscalls |
| 1769 | defined by each seccomp mode. |
| 1770 | |
| 1771 | If unsure, say Y. Only embedded should say N here. |
| 1772 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1773 | source kernel/Kconfig.hz |
| 1774 | |
| 1775 | config KEXEC |
| 1776 | bool "kexec system call" |
Dave Young | 2965faa | 2015-09-09 15:38:55 -0700 | [diff] [blame] | 1777 | select KEXEC_CORE |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1778 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1779 | kexec is a system call that implements the ability to shutdown your |
| 1780 | current kernel, and to start another kernel. It is like a reboot |
| 1781 | but it is independent of the system firmware. And like a reboot |
| 1782 | you can start any kernel with it, not just Linux. |
| 1783 | |
| 1784 | The name comes from the similarity to the exec system call. |
| 1785 | |
| 1786 | It is an ongoing process to be certain the hardware in a machine |
| 1787 | is properly shutdown, so do not be surprised if this code does not |
Geert Uytterhoeven | bf22069 | 2013-08-20 21:38:03 +0200 | [diff] [blame] | 1788 | initially work for you. As of this writing the exact hardware |
| 1789 | interface is strongly in flux, so no good recommendation can be |
| 1790 | made. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1791 | |
Vivek Goyal | 74ca317 | 2014-08-29 15:18:46 -0700 | [diff] [blame] | 1792 | config KEXEC_FILE |
| 1793 | bool "kexec file based system call" |
Dave Young | 2965faa | 2015-09-09 15:38:55 -0700 | [diff] [blame] | 1794 | select KEXEC_CORE |
Vivek Goyal | 74ca317 | 2014-08-29 15:18:46 -0700 | [diff] [blame] | 1795 | select BUILD_BIN2C |
Vivek Goyal | 74ca317 | 2014-08-29 15:18:46 -0700 | [diff] [blame] | 1796 | depends on X86_64 |
| 1797 | depends on CRYPTO=y |
| 1798 | depends on CRYPTO_SHA256=y |
| 1799 | ---help--- |
| 1800 | This is new version of kexec system call. This system call is |
| 1801 | file based and takes file descriptors as system call argument |
| 1802 | for kernel and initramfs as opposed to list of segments as |
| 1803 | accepted by previous system call. |
| 1804 | |
Vivek Goyal | 8e7d838 | 2014-08-08 14:26:13 -0700 | [diff] [blame] | 1805 | config KEXEC_VERIFY_SIG |
| 1806 | bool "Verify kernel signature during kexec_file_load() syscall" |
Vivek Goyal | 74ca317 | 2014-08-29 15:18:46 -0700 | [diff] [blame] | 1807 | depends on KEXEC_FILE |
Vivek Goyal | 8e7d838 | 2014-08-08 14:26:13 -0700 | [diff] [blame] | 1808 | ---help--- |
| 1809 | This option makes kernel signature verification mandatory for |
Borislav Petkov | d8eb894 | 2015-03-13 14:04:37 +0100 | [diff] [blame] | 1810 | the kexec_file_load() syscall. |
Vivek Goyal | 8e7d838 | 2014-08-08 14:26:13 -0700 | [diff] [blame] | 1811 | |
Borislav Petkov | d8eb894 | 2015-03-13 14:04:37 +0100 | [diff] [blame] | 1812 | In addition to that option, you need to enable signature |
| 1813 | verification for the corresponding kernel image type being |
| 1814 | loaded in order for this to work. |
Vivek Goyal | 8e7d838 | 2014-08-08 14:26:13 -0700 | [diff] [blame] | 1815 | |
| 1816 | config KEXEC_BZIMAGE_VERIFY_SIG |
| 1817 | bool "Enable bzImage signature verification support" |
| 1818 | depends on KEXEC_VERIFY_SIG |
| 1819 | depends on SIGNED_PE_FILE_VERIFICATION |
| 1820 | select SYSTEM_TRUSTED_KEYRING |
| 1821 | ---help--- |
| 1822 | Enable bzImage signature verification support. |
| 1823 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1824 | config CRASH_DUMP |
Pavel Machek | 04b6944 | 2008-08-14 17:16:50 +0200 | [diff] [blame] | 1825 | bool "kernel crash dumps" |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1826 | depends on X86_64 || (X86_32 && HIGHMEM) |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1827 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1828 | Generate crash dump after being started by kexec. |
| 1829 | This should be normally only set in special crash dump kernels |
| 1830 | which are loaded in the main kernel with kexec-tools into |
| 1831 | a specially reserved region and then later executed after |
| 1832 | a crash by kdump/kexec. The crash dump kernel must be compiled |
| 1833 | to a memory address not used by the main kernel or BIOS using |
| 1834 | PHYSICAL_START, or it must be built as a relocatable image |
| 1835 | (CONFIG_RELOCATABLE=y). |
| 1836 | For more details see Documentation/kdump/kdump.txt |
| 1837 | |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1838 | config KEXEC_JUMP |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 1839 | bool "kexec jump" |
Huang Ying | fee7b0d | 2009-03-10 10:57:16 +0800 | [diff] [blame] | 1840 | depends on KEXEC && HIBERNATION |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1841 | ---help--- |
Huang Ying | 89081d1 | 2008-07-25 19:45:10 -0700 | [diff] [blame] | 1842 | Jump between original kernel and kexeced kernel and invoke |
| 1843 | code in physical address mode via KEXEC |
Huang Ying | 3ab8352 | 2008-07-25 19:45:07 -0700 | [diff] [blame] | 1844 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1845 | config PHYSICAL_START |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 1846 | hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) |
H. Peter Anvin | ceefccc | 2009-05-11 16:12:16 -0700 | [diff] [blame] | 1847 | default "0x1000000" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1848 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1849 | This gives the physical address where the kernel is loaded. |
| 1850 | |
| 1851 | If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then |
| 1852 | bzImage will decompress itself to above physical address and |
| 1853 | run from there. Otherwise, bzImage will run from the address where |
| 1854 | it has been loaded by the boot loader and will ignore above physical |
| 1855 | address. |
| 1856 | |
| 1857 | In normal kdump cases one does not have to set/change this option |
| 1858 | as now bzImage can be compiled as a completely relocatable image |
| 1859 | (CONFIG_RELOCATABLE=y) and be used to load and run from a different |
| 1860 | address. This option is mainly useful for the folks who don't want |
| 1861 | to use a bzImage for capturing the crash dump and want to use a |
| 1862 | vmlinux instead. vmlinux is not relocatable hence a kernel needs |
| 1863 | to be specifically compiled to run from a specific memory area |
| 1864 | (normally a reserved region) and this option comes handy. |
| 1865 | |
H. Peter Anvin | ceefccc | 2009-05-11 16:12:16 -0700 | [diff] [blame] | 1866 | So if you are using bzImage for capturing the crash dump, |
| 1867 | leave the value here unchanged to 0x1000000 and set |
| 1868 | CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux |
| 1869 | for capturing the crash dump change this value to start of |
| 1870 | the reserved region. In other words, it can be set based on |
| 1871 | the "X" value as specified in the "crashkernel=YM@XM" |
| 1872 | command line boot parameter passed to the panic-ed |
| 1873 | kernel. Please take a look at Documentation/kdump/kdump.txt |
| 1874 | for more details about crash dumps. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1875 | |
| 1876 | Usage of bzImage for capturing the crash dump is recommended as |
| 1877 | one does not have to build two kernels. Same kernel can be used |
| 1878 | as production kernel and capture kernel. Above option should have |
| 1879 | gone away after relocatable bzImage support is introduced. But it |
| 1880 | is present because there are users out there who continue to use |
| 1881 | vmlinux for dump capture. This option should go away down the |
| 1882 | line. |
| 1883 | |
| 1884 | Don't change this unless you know what you are doing. |
| 1885 | |
| 1886 | config RELOCATABLE |
H. Peter Anvin | 2671780 | 2009-05-07 14:19:34 -0700 | [diff] [blame] | 1887 | bool "Build a relocatable kernel" |
| 1888 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1889 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1890 | This builds a kernel image that retains relocation information |
| 1891 | so it can be loaded someplace besides the default 1MB. |
| 1892 | The relocations tend to make the kernel binary about 10% larger, |
| 1893 | but are discarded at runtime. |
| 1894 | |
| 1895 | One use is for the kexec on panic case where the recovery kernel |
| 1896 | must live at a different physical address than the primary |
| 1897 | kernel. |
| 1898 | |
| 1899 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
| 1900 | it has been loaded at and the compile time physical address |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1901 | (CONFIG_PHYSICAL_START) is used as the minimum location. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1902 | |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1903 | config RANDOMIZE_BASE |
| 1904 | bool "Randomize the address of the kernel image" |
| 1905 | depends on RELOCATABLE |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1906 | default n |
| 1907 | ---help--- |
| 1908 | Randomizes the physical and virtual address at which the |
| 1909 | kernel image is decompressed, as a security feature that |
| 1910 | deters exploit attempts relying on knowledge of the location |
| 1911 | of kernel internals. |
| 1912 | |
Kees Cook | a653f35 | 2013-11-11 14:28:39 -0800 | [diff] [blame] | 1913 | Entropy is generated using the RDRAND instruction if it is |
| 1914 | supported. If RDTSC is supported, it is used as well. If |
| 1915 | neither RDRAND nor RDTSC are supported, then randomness is |
| 1916 | read from the i8254 timer. |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1917 | |
| 1918 | The kernel will be offset by up to RANDOMIZE_BASE_MAX_OFFSET, |
Kees Cook | a653f35 | 2013-11-11 14:28:39 -0800 | [diff] [blame] | 1919 | and aligned according to PHYSICAL_ALIGN. Since the kernel is |
| 1920 | built using 2GiB addressing, and PHYSICAL_ALGIN must be at a |
| 1921 | minimum of 2MiB, only 10 bits of entropy is theoretically |
| 1922 | possible. At best, due to page table layouts, 64-bit can use |
| 1923 | 9 bits of entropy and 32-bit uses 8 bits. |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1924 | |
Kees Cook | da2b6fb | 2013-12-10 12:27:45 -0800 | [diff] [blame] | 1925 | If unsure, say N. |
| 1926 | |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1927 | config RANDOMIZE_BASE_MAX_OFFSET |
Kees Cook | da2b6fb | 2013-12-10 12:27:45 -0800 | [diff] [blame] | 1928 | hex "Maximum kASLR offset allowed" if EXPERT |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1929 | depends on RANDOMIZE_BASE |
Kees Cook | 6145cfe | 2013-10-10 17:18:18 -0700 | [diff] [blame] | 1930 | range 0x0 0x20000000 if X86_32 |
| 1931 | default "0x20000000" if X86_32 |
| 1932 | range 0x0 0x40000000 if X86_64 |
| 1933 | default "0x40000000" if X86_64 |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1934 | ---help--- |
Kees Cook | da2b6fb | 2013-12-10 12:27:45 -0800 | [diff] [blame] | 1935 | The lesser of RANDOMIZE_BASE_MAX_OFFSET and available physical |
| 1936 | memory is used to determine the maximal offset in bytes that will |
| 1937 | be applied to the kernel when kernel Address Space Layout |
| 1938 | Randomization (kASLR) is active. This must be a multiple of |
| 1939 | PHYSICAL_ALIGN. |
Kees Cook | 6145cfe | 2013-10-10 17:18:18 -0700 | [diff] [blame] | 1940 | |
Kees Cook | da2b6fb | 2013-12-10 12:27:45 -0800 | [diff] [blame] | 1941 | On 32-bit this is limited to 512MiB by page table layouts. The |
| 1942 | default is 512MiB. |
Kees Cook | 6145cfe | 2013-10-10 17:18:18 -0700 | [diff] [blame] | 1943 | |
Kees Cook | da2b6fb | 2013-12-10 12:27:45 -0800 | [diff] [blame] | 1944 | On 64-bit this is limited by how the kernel fixmap page table is |
| 1945 | positioned, so this cannot be larger than 1GiB currently. Without |
| 1946 | RANDOMIZE_BASE, there is a 512MiB to 1.5GiB split between kernel |
| 1947 | and modules. When RANDOMIZE_BASE_MAX_OFFSET is above 512MiB, the |
| 1948 | modules area will shrink to compensate, up to the current maximum |
| 1949 | 1GiB to 1GiB split. The default is 1GiB. |
| 1950 | |
| 1951 | If unsure, leave at the default value. |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1952 | |
| 1953 | # Relocation on x86 needs some additional build support |
H. Peter Anvin | 845adf7 | 2009-05-05 21:20:51 -0700 | [diff] [blame] | 1954 | config X86_NEED_RELOCS |
| 1955 | def_bool y |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1956 | depends on RANDOMIZE_BASE || (X86_32 && RELOCATABLE) |
H. Peter Anvin | 845adf7 | 2009-05-05 21:20:51 -0700 | [diff] [blame] | 1957 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1958 | config PHYSICAL_ALIGN |
Kees Cook | a021506 | 2013-07-08 09:15:17 -0700 | [diff] [blame] | 1959 | hex "Alignment value to which kernel should be aligned" |
Kees Cook | 8ab3820 | 2013-10-10 17:18:14 -0700 | [diff] [blame] | 1960 | default "0x200000" |
Kees Cook | a021506 | 2013-07-08 09:15:17 -0700 | [diff] [blame] | 1961 | range 0x2000 0x1000000 if X86_32 |
| 1962 | range 0x200000 0x1000000 if X86_64 |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 1963 | ---help--- |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1964 | This value puts the alignment restrictions on physical address |
| 1965 | where kernel is loaded and run from. Kernel is compiled for an |
| 1966 | address which meets above alignment restriction. |
| 1967 | |
| 1968 | If bootloader loads the kernel at a non-aligned address and |
| 1969 | CONFIG_RELOCATABLE is set, kernel will move itself to nearest |
| 1970 | address aligned to above value and run from there. |
| 1971 | |
| 1972 | If bootloader loads the kernel at a non-aligned address and |
| 1973 | CONFIG_RELOCATABLE is not set, kernel will ignore the run time |
| 1974 | load address and decompress itself to the address it has been |
| 1975 | compiled for and run from there. The address for which kernel is |
| 1976 | compiled already meets above alignment restrictions. Hence the |
| 1977 | end result is that kernel runs from a physical address meeting |
| 1978 | above alignment restrictions. |
| 1979 | |
Kees Cook | a021506 | 2013-07-08 09:15:17 -0700 | [diff] [blame] | 1980 | On 32-bit this value must be a multiple of 0x2000. On 64-bit |
| 1981 | this value must be a multiple of 0x200000. |
| 1982 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1983 | Don't change this unless you know what you are doing. |
| 1984 | |
| 1985 | config HOTPLUG_CPU |
Dimitri Sivanich | 7c13e6a | 2008-08-11 10:46:46 -0500 | [diff] [blame] | 1986 | bool "Support for hot-pluggable CPUs" |
Stephen Rothwell | 40b3136 | 2013-05-21 13:49:35 +1000 | [diff] [blame] | 1987 | depends on SMP |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1988 | ---help--- |
Dimitri Sivanich | 7c13e6a | 2008-08-11 10:46:46 -0500 | [diff] [blame] | 1989 | Say Y here to allow turning CPUs off and on. CPUs can be |
| 1990 | controlled through /sys/devices/system/cpu. |
| 1991 | ( Note: power management support will enable this option |
| 1992 | automatically on SMP systems. ) |
| 1993 | Say N if you want to disable CPU hotplug. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 1994 | |
Fenghua Yu | 80aa1df | 2012-11-13 11:32:39 -0800 | [diff] [blame] | 1995 | config BOOTPARAM_HOTPLUG_CPU0 |
| 1996 | bool "Set default setting of cpu0_hotpluggable" |
| 1997 | default n |
Kees Cook | 2c922cd | 2013-01-22 13:01:19 -0800 | [diff] [blame] | 1998 | depends on HOTPLUG_CPU |
Fenghua Yu | 80aa1df | 2012-11-13 11:32:39 -0800 | [diff] [blame] | 1999 | ---help--- |
| 2000 | Set whether default state of cpu0_hotpluggable is on or off. |
| 2001 | |
| 2002 | Say Y here to enable CPU0 hotplug by default. If this switch |
| 2003 | is turned on, there is no need to give cpu0_hotplug kernel |
| 2004 | parameter and the CPU0 hotplug feature is enabled by default. |
| 2005 | |
| 2006 | Please note: there are two known CPU0 dependencies if you want |
| 2007 | to enable the CPU0 hotplug feature either by this switch or by |
| 2008 | cpu0_hotplug kernel parameter. |
| 2009 | |
| 2010 | First, resume from hibernate or suspend always starts from CPU0. |
| 2011 | So hibernate and suspend are prevented if CPU0 is offline. |
| 2012 | |
| 2013 | Second dependency is PIC interrupts always go to CPU0. CPU0 can not |
| 2014 | offline if any interrupt can not migrate out of CPU0. There may |
| 2015 | be other CPU0 dependencies. |
| 2016 | |
| 2017 | Please make sure the dependencies are under your control before |
| 2018 | you enable this feature. |
| 2019 | |
| 2020 | Say N if you don't want to enable CPU0 hotplug feature by default. |
| 2021 | You still can enable the CPU0 hotplug feature at boot by kernel |
| 2022 | parameter cpu0_hotplug. |
| 2023 | |
Fenghua Yu | a71c8bc | 2012-11-13 11:32:51 -0800 | [diff] [blame] | 2024 | config DEBUG_HOTPLUG_CPU0 |
| 2025 | def_bool n |
| 2026 | prompt "Debug CPU0 hotplug" |
Kees Cook | 2c922cd | 2013-01-22 13:01:19 -0800 | [diff] [blame] | 2027 | depends on HOTPLUG_CPU |
Fenghua Yu | a71c8bc | 2012-11-13 11:32:51 -0800 | [diff] [blame] | 2028 | ---help--- |
| 2029 | Enabling this option offlines CPU0 (if CPU0 can be offlined) as |
| 2030 | soon as possible and boots up userspace with CPU0 offlined. User |
| 2031 | can online CPU0 back after boot time. |
| 2032 | |
| 2033 | To debug CPU0 hotplug, you need to enable CPU0 offline/online |
| 2034 | feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during |
| 2035 | compilation or giving cpu0_hotplug kernel parameter at boot. |
| 2036 | |
| 2037 | If unsure, say N. |
| 2038 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 2039 | config COMPAT_VDSO |
Andy Lutomirski | b0b49f2 | 2014-03-13 16:01:26 -0700 | [diff] [blame] | 2040 | def_bool n |
| 2041 | prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)" |
Roland McGrath | af65d64 | 2008-01-30 13:30:43 +0100 | [diff] [blame] | 2042 | depends on X86_32 || IA32_EMULATION |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2043 | ---help--- |
Andy Lutomirski | b0b49f2 | 2014-03-13 16:01:26 -0700 | [diff] [blame] | 2044 | Certain buggy versions of glibc will crash if they are |
| 2045 | presented with a 32-bit vDSO that is not mapped at the address |
| 2046 | indicated in its segment table. |
Randy Dunlap | e84446d | 2009-11-10 15:46:52 -0800 | [diff] [blame] | 2047 | |
Andy Lutomirski | b0b49f2 | 2014-03-13 16:01:26 -0700 | [diff] [blame] | 2048 | The bug was introduced by f866314b89d56845f55e6f365e18b31ec978ec3a |
| 2049 | and fixed by 3b3ddb4f7db98ec9e912ccdf54d35df4aa30e04a and |
| 2050 | 49ad572a70b8aeb91e57483a11dd1b77e31c4468. Glibc 2.3.3 is |
| 2051 | the only released version with the bug, but OpenSUSE 9 |
| 2052 | contains a buggy "glibc 2.3.2". |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 2053 | |
Andy Lutomirski | b0b49f2 | 2014-03-13 16:01:26 -0700 | [diff] [blame] | 2054 | The symptom of the bug is that everything crashes on startup, saying: |
| 2055 | dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed! |
| 2056 | |
| 2057 | Saying Y here changes the default value of the vdso32 boot |
| 2058 | option from 1 to 0, which turns off the 32-bit vDSO entirely. |
| 2059 | This works around the glibc bug but hurts performance. |
| 2060 | |
| 2061 | If unsure, say N: if you are compiling your own kernel, you |
| 2062 | are unlikely to be using a buggy version of glibc. |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 2063 | |
Kees Cook | 3dc33bd | 2015-08-12 17:55:19 -0700 | [diff] [blame] | 2064 | choice |
| 2065 | prompt "vsyscall table for legacy applications" |
| 2066 | depends on X86_64 |
| 2067 | default LEGACY_VSYSCALL_EMULATE |
| 2068 | help |
| 2069 | Legacy user code that does not know how to find the vDSO expects |
| 2070 | to be able to issue three syscalls by calling fixed addresses in |
| 2071 | kernel space. Since this location is not randomized with ASLR, |
| 2072 | it can be used to assist security vulnerability exploitation. |
| 2073 | |
| 2074 | This setting can be changed at boot time via the kernel command |
| 2075 | line parameter vsyscall=[native|emulate|none]. |
| 2076 | |
| 2077 | On a system with recent enough glibc (2.14 or newer) and no |
| 2078 | static binaries, you can say None without a performance penalty |
| 2079 | to improve security. |
| 2080 | |
| 2081 | If unsure, select "Emulate". |
| 2082 | |
| 2083 | config LEGACY_VSYSCALL_NATIVE |
| 2084 | bool "Native" |
| 2085 | help |
| 2086 | Actual executable code is located in the fixed vsyscall |
| 2087 | address mapping, implementing time() efficiently. Since |
| 2088 | this makes the mapping executable, it can be used during |
| 2089 | security vulnerability exploitation (traditionally as |
| 2090 | ROP gadgets). This configuration is not recommended. |
| 2091 | |
| 2092 | config LEGACY_VSYSCALL_EMULATE |
| 2093 | bool "Emulate" |
| 2094 | help |
| 2095 | The kernel traps and emulates calls into the fixed |
| 2096 | vsyscall address mapping. This makes the mapping |
| 2097 | non-executable, but it still contains known contents, |
| 2098 | which could be used in certain rare security vulnerability |
| 2099 | exploits. This configuration is recommended when userspace |
| 2100 | still uses the vsyscall area. |
| 2101 | |
| 2102 | config LEGACY_VSYSCALL_NONE |
| 2103 | bool "None" |
| 2104 | help |
| 2105 | There will be no vsyscall mapping at all. This will |
| 2106 | eliminate any risk of ASLR bypass due to the vsyscall |
| 2107 | fixed address mapping. Attempts to use the vsyscalls |
| 2108 | will be reported to dmesg, so that either old or |
| 2109 | malicious userspace programs can be identified. |
| 2110 | |
| 2111 | endchoice |
| 2112 | |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 2113 | config CMDLINE_BOOL |
| 2114 | bool "Built-in kernel command line" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2115 | ---help--- |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 2116 | Allow for specifying boot arguments to the kernel at |
| 2117 | build time. On some systems (e.g. embedded ones), it is |
| 2118 | necessary or convenient to provide some or all of the |
| 2119 | kernel boot arguments with the kernel itself (that is, |
| 2120 | to not rely on the boot loader to provide them.) |
| 2121 | |
| 2122 | To compile command line arguments into the kernel, |
| 2123 | set this option to 'Y', then fill in the |
Sébastien Hinderer | 69711ca | 2015-07-08 00:02:01 +0200 | [diff] [blame] | 2124 | boot arguments in CONFIG_CMDLINE. |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 2125 | |
| 2126 | Systems with fully functional boot loaders (i.e. non-embedded) |
| 2127 | should leave this option set to 'N'. |
| 2128 | |
| 2129 | config CMDLINE |
| 2130 | string "Built-in kernel command string" |
| 2131 | depends on CMDLINE_BOOL |
| 2132 | default "" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2133 | ---help--- |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 2134 | Enter arguments here that should be compiled into the kernel |
| 2135 | image and used at boot time. If the boot loader provides a |
| 2136 | command line at boot time, it is appended to this string to |
| 2137 | form the full kernel command line, when the system boots. |
| 2138 | |
| 2139 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to |
| 2140 | change this behavior. |
| 2141 | |
| 2142 | In most cases, the command line (whether built-in or provided |
| 2143 | by the boot loader) should specify the device for the root |
| 2144 | file system. |
| 2145 | |
| 2146 | config CMDLINE_OVERRIDE |
| 2147 | bool "Built-in command line overrides boot loader arguments" |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 2148 | depends on CMDLINE_BOOL |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2149 | ---help--- |
Tim Bird | 516cbf3 | 2008-08-12 12:52:36 -0700 | [diff] [blame] | 2150 | Set this option to 'Y' to have the kernel ignore the boot loader |
| 2151 | command line, and use ONLY the built-in command line. |
| 2152 | |
| 2153 | This is used to work around broken boot loaders. This should |
| 2154 | be set to 'N' under normal conditions. |
| 2155 | |
Andy Lutomirski | a5b9e5a | 2015-07-30 14:31:34 -0700 | [diff] [blame] | 2156 | config MODIFY_LDT_SYSCALL |
| 2157 | bool "Enable the LDT (local descriptor table)" if EXPERT |
| 2158 | default y |
| 2159 | ---help--- |
| 2160 | Linux can allow user programs to install a per-process x86 |
| 2161 | Local Descriptor Table (LDT) using the modify_ldt(2) system |
| 2162 | call. This is required to run 16-bit or segmented code such as |
| 2163 | DOSEMU or some Wine programs. It is also used by some very old |
| 2164 | threading libraries. |
| 2165 | |
| 2166 | Enabling this feature adds a small amount of overhead to |
| 2167 | context switches and increases the low-level kernel attack |
| 2168 | surface. Disabling it removes the modify_ldt(2) system call. |
| 2169 | |
| 2170 | Saying 'N' here may make sense for embedded or server kernels. |
| 2171 | |
Seth Jennings | b700e7f | 2014-12-16 11:58:19 -0600 | [diff] [blame] | 2172 | source "kernel/livepatch/Kconfig" |
| 2173 | |
Sam Ravnborg | 506f1d0 | 2007-11-09 21:56:54 +0100 | [diff] [blame] | 2174 | endmenu |
| 2175 | |
| 2176 | config ARCH_ENABLE_MEMORY_HOTPLUG |
| 2177 | def_bool y |
| 2178 | depends on X86_64 || (X86_32 && HIGHMEM) |
| 2179 | |
Gary Hade | 3555105 | 2008-10-31 10:52:03 -0700 | [diff] [blame] | 2180 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
| 2181 | def_bool y |
| 2182 | depends on MEMORY_HOTPLUG |
| 2183 | |
Lee Schermerhorn | e534c7c | 2010-05-26 14:44:58 -0700 | [diff] [blame] | 2184 | config USE_PERCPU_NUMA_NODE_ID |
Tejun Heo | 645a791 | 2011-01-23 14:37:40 +0100 | [diff] [blame] | 2185 | def_bool y |
Lee Schermerhorn | e534c7c | 2010-05-26 14:44:58 -0700 | [diff] [blame] | 2186 | depends on NUMA |
| 2187 | |
Kirill A. Shutemov | 9491846 | 2013-11-14 14:31:10 -0800 | [diff] [blame] | 2188 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
| 2189 | def_bool y |
| 2190 | depends on X86_64 || X86_PAE |
| 2191 | |
Naoya Horiguchi | c177c81 | 2014-06-04 16:05:35 -0700 | [diff] [blame] | 2192 | config ARCH_ENABLE_HUGEPAGE_MIGRATION |
| 2193 | def_bool y |
| 2194 | depends on X86_64 && HUGETLB_PAGE && MIGRATION |
| 2195 | |
Bjorn Helgaas | da85f86 | 2008-11-05 13:37:27 -0600 | [diff] [blame] | 2196 | menu "Power management and ACPI options" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2197 | |
| 2198 | config ARCH_HIBERNATION_HEADER |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2199 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2200 | depends on X86_64 && HIBERNATION |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2201 | |
| 2202 | source "kernel/power/Kconfig" |
| 2203 | |
| 2204 | source "drivers/acpi/Kconfig" |
| 2205 | |
Feng Tang | efafc8b | 2009-08-14 15:23:29 -0400 | [diff] [blame] | 2206 | source "drivers/sfi/Kconfig" |
| 2207 | |
Andi Kleen | a6b6807 | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 2208 | config X86_APM_BOOT |
Jan Beulich | 6fc108a | 2010-04-21 15:23:44 +0100 | [diff] [blame] | 2209 | def_bool y |
Paul Bolle | 282e5aa | 2011-11-17 11:41:31 +0100 | [diff] [blame] | 2210 | depends on APM |
Andi Kleen | a6b6807 | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 2211 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2212 | menuconfig APM |
| 2213 | tristate "APM (Advanced Power Management) BIOS support" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 2214 | depends on X86_32 && PM_SLEEP |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2215 | ---help--- |
| 2216 | APM is a BIOS specification for saving power using several different |
| 2217 | techniques. This is mostly useful for battery powered laptops with |
| 2218 | APM compliant BIOSes. If you say Y here, the system time will be |
| 2219 | reset after a RESUME operation, the /proc/apm device will provide |
| 2220 | battery status information, and user-space programs will receive |
| 2221 | notification of APM "events" (e.g. battery status change). |
| 2222 | |
| 2223 | If you select "Y" here, you can disable actual use of the APM |
| 2224 | BIOS by passing the "apm=off" option to the kernel at boot time. |
| 2225 | |
| 2226 | Note that the APM support is almost completely disabled for |
| 2227 | machines with more than one CPU. |
| 2228 | |
| 2229 | In order to use APM, you will need supporting software. For location |
Michael Witten | 2dc98fd | 2011-07-08 21:11:16 +0000 | [diff] [blame] | 2230 | and more information, read <file:Documentation/power/apm-acpi.txt> |
| 2231 | and the Battery Powered Linux mini-HOWTO, available from |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2232 | <http://www.tldp.org/docs.html#howto>. |
| 2233 | |
| 2234 | This driver does not spin down disk drives (see the hdparm(8) |
| 2235 | manpage ("man 8 hdparm") for that), and it doesn't turn off |
| 2236 | VESA-compliant "green" monitors. |
| 2237 | |
| 2238 | This driver does not support the TI 4000M TravelMate and the ACER |
| 2239 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" |
| 2240 | desktop machines also don't have compliant BIOSes, and this driver |
| 2241 | may cause those machines to panic during the boot phase. |
| 2242 | |
| 2243 | Generally, if you don't have a battery in your machine, there isn't |
| 2244 | much point in using this driver and you should say N. If you get |
| 2245 | random kernel OOPSes or reboots that don't seem to be related to |
| 2246 | anything, try disabling/enabling this option (or disabling/enabling |
| 2247 | APM in your BIOS). |
| 2248 | |
| 2249 | Some other things you should try when experiencing seemingly random, |
| 2250 | "weird" problems: |
| 2251 | |
| 2252 | 1) make sure that you have enough swap space and that it is |
| 2253 | enabled. |
| 2254 | 2) pass the "no-hlt" option to the kernel |
| 2255 | 3) switch on floating point emulation in the kernel and pass |
| 2256 | the "no387" option to the kernel |
| 2257 | 4) pass the "floppy=nodma" option to the kernel |
| 2258 | 5) pass the "mem=4M" option to the kernel (thereby disabling |
| 2259 | all but the first 4 MB of RAM) |
| 2260 | 6) make sure that the CPU is not over clocked. |
| 2261 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> |
| 2262 | 8) disable the cache from your BIOS settings |
| 2263 | 9) install a fan for the video card or exchange video RAM |
| 2264 | 10) install a better fan for the CPU |
| 2265 | 11) exchange RAM chips |
| 2266 | 12) exchange the motherboard. |
| 2267 | |
| 2268 | To compile this driver as a module, choose M here: the |
| 2269 | module will be called apm. |
| 2270 | |
| 2271 | if APM |
| 2272 | |
| 2273 | config APM_IGNORE_USER_SUSPEND |
| 2274 | bool "Ignore USER SUSPEND" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2275 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2276 | This option will ignore USER SUSPEND requests. On machines with a |
| 2277 | compliant APM BIOS, you want to say N. However, on the NEC Versa M |
| 2278 | series notebooks, it is necessary to say Y because of a BIOS bug. |
| 2279 | |
| 2280 | config APM_DO_ENABLE |
| 2281 | bool "Enable PM at boot time" |
| 2282 | ---help--- |
| 2283 | Enable APM features at boot time. From page 36 of the APM BIOS |
| 2284 | specification: "When disabled, the APM BIOS does not automatically |
| 2285 | power manage devices, enter the Standby State, enter the Suspend |
| 2286 | State, or take power saving steps in response to CPU Idle calls." |
| 2287 | This driver will make CPU Idle calls when Linux is idle (unless this |
| 2288 | feature is turned off -- see "Do CPU IDLE calls", below). This |
| 2289 | should always save battery power, but more complicated APM features |
| 2290 | will be dependent on your BIOS implementation. You may need to turn |
| 2291 | this option off if your computer hangs at boot time when using APM |
| 2292 | support, or if it beeps continuously instead of suspending. Turn |
| 2293 | this off if you have a NEC UltraLite Versa 33/C or a Toshiba |
| 2294 | T400CDT. This is off by default since most machines do fine without |
| 2295 | this feature. |
| 2296 | |
| 2297 | config APM_CPU_IDLE |
Len Brown | dd8af07 | 2013-02-09 21:10:04 -0500 | [diff] [blame] | 2298 | depends on CPU_IDLE |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2299 | bool "Make CPU Idle calls when idle" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2300 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2301 | Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. |
| 2302 | On some machines, this can activate improved power savings, such as |
| 2303 | a slowed CPU clock rate, when the machine is idle. These idle calls |
| 2304 | are made after the idle loop has run for some length of time (e.g., |
| 2305 | 333 mS). On some machines, this will cause a hang at boot time or |
| 2306 | whenever the CPU becomes idle. (On machines with more than one CPU, |
| 2307 | this option does nothing.) |
| 2308 | |
| 2309 | config APM_DISPLAY_BLANK |
| 2310 | bool "Enable console blanking using APM" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2311 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2312 | Enable console blanking using the APM. Some laptops can use this to |
| 2313 | turn off the LCD backlight when the screen blanker of the Linux |
| 2314 | virtual console blanks the screen. Note that this is only used by |
| 2315 | the virtual console screen blanker, and won't turn off the backlight |
| 2316 | when using the X Window system. This also doesn't have anything to |
| 2317 | do with your VESA-compliant power-saving monitor. Further, this |
| 2318 | option doesn't work for all laptops -- it might not turn off your |
| 2319 | backlight at all, or it might print a lot of errors to the console, |
| 2320 | especially if you are using gpm. |
| 2321 | |
| 2322 | config APM_ALLOW_INTS |
| 2323 | bool "Allow interrupts during APM BIOS calls" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2324 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2325 | Normally we disable external interrupts while we are making calls to |
| 2326 | the APM BIOS as a measure to lessen the effects of a badly behaving |
| 2327 | BIOS implementation. The BIOS should reenable interrupts if it |
| 2328 | needs to. Unfortunately, some BIOSes do not -- especially those in |
| 2329 | many of the newer IBM Thinkpads. If you experience hangs when you |
| 2330 | suspend, try setting this to Y. Otherwise, say N. |
| 2331 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2332 | endif # APM |
| 2333 | |
Dave Jones | bb0a56e | 2011-05-19 18:51:07 -0400 | [diff] [blame] | 2334 | source "drivers/cpufreq/Kconfig" |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2335 | |
| 2336 | source "drivers/cpuidle/Kconfig" |
| 2337 | |
Andy Henroid | 27471fd | 2008-10-09 11:45:22 -0700 | [diff] [blame] | 2338 | source "drivers/idle/Kconfig" |
| 2339 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2340 | endmenu |
| 2341 | |
| 2342 | |
| 2343 | menu "Bus options (PCI etc.)" |
| 2344 | |
| 2345 | config PCI |
Ingo Molnar | 1ac9701 | 2008-05-19 14:10:14 +0200 | [diff] [blame] | 2346 | bool "PCI support" |
Adrian Bunk | 1c85808 | 2008-01-30 13:32:32 +0100 | [diff] [blame] | 2347 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2348 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2349 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 2350 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 2351 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 2352 | VESA. If you have PCI, say Y, otherwise N. |
| 2353 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2354 | choice |
| 2355 | prompt "PCI access mode" |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 2356 | depends on X86_32 && PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2357 | default PCI_GOANY |
| 2358 | ---help--- |
| 2359 | On PCI systems, the BIOS can be used to detect the PCI devices and |
| 2360 | determine their configuration. However, some old PCI motherboards |
| 2361 | have BIOS bugs and may crash if this is done. Also, some embedded |
| 2362 | PCI-based systems don't have any BIOS at all. Linux can also try to |
| 2363 | detect the PCI hardware directly without using the BIOS. |
| 2364 | |
| 2365 | With this option, you can specify how Linux should detect the |
| 2366 | PCI devices. If you choose "BIOS", the BIOS will be used, |
| 2367 | if you choose "Direct", the BIOS won't be used, and if you |
| 2368 | choose "MMConfig", then PCI Express MMCONFIG will be used. |
| 2369 | If you choose "Any", the kernel will try MMCONFIG, then the |
| 2370 | direct access method and falls back to the BIOS if that doesn't |
| 2371 | work. If unsure, go with the default, which is "Any". |
| 2372 | |
| 2373 | config PCI_GOBIOS |
| 2374 | bool "BIOS" |
| 2375 | |
| 2376 | config PCI_GOMMCONFIG |
| 2377 | bool "MMConfig" |
| 2378 | |
| 2379 | config PCI_GODIRECT |
| 2380 | bool "Direct" |
| 2381 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 2382 | config PCI_GOOLPC |
Daniel Drake | 76fb657 | 2010-09-23 17:28:04 +0100 | [diff] [blame] | 2383 | bool "OLPC XO-1" |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 2384 | depends on OLPC |
| 2385 | |
Andres Salomon | 2bdd1b0 | 2008-06-05 14:14:41 -0700 | [diff] [blame] | 2386 | config PCI_GOANY |
| 2387 | bool "Any" |
| 2388 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2389 | endchoice |
| 2390 | |
| 2391 | config PCI_BIOS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2392 | def_bool y |
Ingo Molnar | efefa6f | 2008-07-10 16:09:50 +0200 | [diff] [blame] | 2393 | depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2394 | |
| 2395 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. |
| 2396 | config PCI_DIRECT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2397 | def_bool y |
Shaohua Li | 0aba496 | 2011-05-27 14:59:39 +0800 | [diff] [blame] | 2398 | depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG)) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2399 | |
| 2400 | config PCI_MMCONFIG |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2401 | def_bool y |
Feng Tang | 5f0db7a | 2009-08-14 15:37:50 -0400 | [diff] [blame] | 2402 | depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY) |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2403 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 2404 | config PCI_OLPC |
Andres Salomon | 2bdd1b0 | 2008-06-05 14:14:41 -0700 | [diff] [blame] | 2405 | def_bool y |
| 2406 | depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY) |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 2407 | |
Alex Nixon | b5401a9 | 2010-03-18 16:31:34 -0400 | [diff] [blame] | 2408 | config PCI_XEN |
| 2409 | def_bool y |
| 2410 | depends on PCI && XEN |
| 2411 | select SWIOTLB_XEN |
| 2412 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2413 | config PCI_DOMAINS |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2414 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2415 | depends on PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2416 | |
| 2417 | config PCI_MMCONFIG |
| 2418 | bool "Support mmconfig PCI config space access" |
| 2419 | depends on X86_64 && PCI && ACPI |
| 2420 | |
Ira W. Snyder | 3f6ea84 | 2010-04-01 11:43:30 -0700 | [diff] [blame] | 2421 | config PCI_CNB20LE_QUIRK |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 2422 | bool "Read CNB20LE Host Bridge Windows" if EXPERT |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 2423 | depends on PCI |
Ira W. Snyder | 3f6ea84 | 2010-04-01 11:43:30 -0700 | [diff] [blame] | 2424 | help |
| 2425 | Read the PCI windows out of the CNB20LE host bridge. This allows |
| 2426 | PCI hotplug to work on systems with the CNB20LE chipset which do |
| 2427 | not have ACPI. |
| 2428 | |
Bjorn Helgaas | 64a5fed | 2011-01-06 10:12:30 -0700 | [diff] [blame] | 2429 | There's no public spec for this chipset, and this functionality |
| 2430 | is known to be incomplete. |
| 2431 | |
| 2432 | You should say N unless you know you need this. |
| 2433 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2434 | source "drivers/pci/pcie/Kconfig" |
| 2435 | |
| 2436 | source "drivers/pci/Kconfig" |
| 2437 | |
David Rientjes | 1c00f01 | 2011-03-22 16:34:59 -0700 | [diff] [blame] | 2438 | # x86_64 have no ISA slots, but can have ISA-style DMA. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2439 | config ISA_DMA_API |
David Rientjes | 1c00f01 | 2011-03-22 16:34:59 -0700 | [diff] [blame] | 2440 | bool "ISA-style DMA support" if (X86_64 && EXPERT) |
| 2441 | default y |
| 2442 | help |
| 2443 | Enables ISA-style DMA support for devices requiring such controllers. |
| 2444 | If unsure, say Y. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2445 | |
| 2446 | if X86_32 |
| 2447 | |
| 2448 | config ISA |
| 2449 | bool "ISA support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2450 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2451 | Find out whether you have ISA slots on your motherboard. ISA is the |
| 2452 | name of a bus system, i.e. the way the CPU talks to the other stuff |
| 2453 | inside your box. Other bus systems are PCI, EISA, MicroChannel |
| 2454 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; |
| 2455 | newer boards don't support it. If you have ISA, say Y, otherwise N. |
| 2456 | |
| 2457 | config EISA |
| 2458 | bool "EISA support" |
| 2459 | depends on ISA |
| 2460 | ---help--- |
| 2461 | The Extended Industry Standard Architecture (EISA) bus was |
| 2462 | developed as an open alternative to the IBM MicroChannel bus. |
| 2463 | |
| 2464 | The EISA bus provided some of the features of the IBM MicroChannel |
| 2465 | bus while maintaining backward compatibility with cards made for |
| 2466 | the older ISA bus. The EISA bus saw limited use between 1988 and |
| 2467 | 1995 when it was made obsolete by the PCI bus. |
| 2468 | |
| 2469 | Say Y here if you are building a kernel for an EISA-based machine. |
| 2470 | |
| 2471 | Otherwise, say N. |
| 2472 | |
| 2473 | source "drivers/eisa/Kconfig" |
| 2474 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2475 | config SCx200 |
| 2476 | tristate "NatSemi SCx200 support" |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2477 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2478 | This provides basic support for National Semiconductor's |
| 2479 | (now AMD's) Geode processors. The driver probes for the |
| 2480 | PCI-IDs of several on-chip devices, so its a good dependency |
| 2481 | for other scx200_* drivers. |
| 2482 | |
| 2483 | If compiled as a module, the driver is named scx200. |
| 2484 | |
| 2485 | config SCx200HR_TIMER |
| 2486 | tristate "NatSemi SCx200 27MHz High-Resolution Timer Support" |
John Stultz | 592913e | 2010-07-13 17:56:20 -0700 | [diff] [blame] | 2487 | depends on SCx200 |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2488 | default y |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2489 | ---help--- |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2490 | This driver provides a clocksource built upon the on-chip |
| 2491 | 27MHz high-resolution timer. Its also a workaround for |
| 2492 | NSC Geode SC-1100's buggy TSC, which loses time when the |
| 2493 | processor goes idle (as is done by the scheduler). The |
| 2494 | other workaround is idle=poll boot option. |
| 2495 | |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 2496 | config OLPC |
| 2497 | bool "One Laptop Per Child support" |
Thomas Gleixner | 5400897 | 2011-02-23 09:50:15 +0100 | [diff] [blame] | 2498 | depends on !X86_PAE |
Andres Salomon | 3c55494 | 2009-12-14 18:00:36 -0800 | [diff] [blame] | 2499 | select GPIOLIB |
Thomas Gleixner | dc3119e7 | 2011-02-23 10:08:31 +0100 | [diff] [blame] | 2500 | select OF |
Daniel Drake | 45bb167 | 2011-03-13 15:10:17 +0000 | [diff] [blame] | 2501 | select OF_PROMTREE |
Grant Likely | b4e5185 | 2011-12-16 15:50:17 -0700 | [diff] [blame] | 2502 | select IRQ_DOMAIN |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2503 | ---help--- |
Andres Salomon | 3ef0e1f | 2008-04-29 00:59:53 -0700 | [diff] [blame] | 2504 | Add support for detecting the unique features of the OLPC |
| 2505 | XO hardware. |
| 2506 | |
Daniel Drake | a312858 | 2011-06-25 17:34:10 +0100 | [diff] [blame] | 2507 | config OLPC_XO1_PM |
| 2508 | bool "OLPC XO-1 Power Management" |
Daniel Drake | 97c4cb7 | 2011-06-25 17:34:11 +0100 | [diff] [blame] | 2509 | depends on OLPC && MFD_CS5535 && PM_SLEEP |
Daniel Drake | a312858 | 2011-06-25 17:34:10 +0100 | [diff] [blame] | 2510 | select MFD_CORE |
Daniel Drake | bf1ebf0 | 2010-10-10 10:40:32 +0100 | [diff] [blame] | 2511 | ---help--- |
Daniel Drake | 97c4cb7 | 2011-06-25 17:34:11 +0100 | [diff] [blame] | 2512 | Add support for poweroff and suspend of the OLPC XO-1 laptop. |
Daniel Drake | bf1ebf0 | 2010-10-10 10:40:32 +0100 | [diff] [blame] | 2513 | |
Daniel Drake | cfee959 | 2011-06-25 17:34:17 +0100 | [diff] [blame] | 2514 | config OLPC_XO1_RTC |
| 2515 | bool "OLPC XO-1 Real Time Clock" |
| 2516 | depends on OLPC_XO1_PM && RTC_DRV_CMOS |
| 2517 | ---help--- |
| 2518 | Add support for the XO-1 real time clock, which can be used as a |
| 2519 | programmable wakeup source. |
| 2520 | |
Daniel Drake | 7feda8e | 2011-06-25 17:34:12 +0100 | [diff] [blame] | 2521 | config OLPC_XO1_SCI |
| 2522 | bool "OLPC XO-1 SCI extras" |
Daniel Drake | d8d01a6 | 2011-07-24 18:33:21 +0100 | [diff] [blame] | 2523 | depends on OLPC && OLPC_XO1_PM |
Randy Dunlap | ed8e47f | 2012-12-18 12:22:17 -0800 | [diff] [blame] | 2524 | depends on INPUT=y |
Daniel Drake | d8d01a6 | 2011-07-24 18:33:21 +0100 | [diff] [blame] | 2525 | select POWER_SUPPLY |
Daniel Drake | 7feda8e | 2011-06-25 17:34:12 +0100 | [diff] [blame] | 2526 | select GPIO_CS5535 |
| 2527 | select MFD_CORE |
| 2528 | ---help--- |
| 2529 | Add support for SCI-based features of the OLPC XO-1 laptop: |
Daniel Drake | 7bc74b3 | 2011-06-25 17:34:14 +0100 | [diff] [blame] | 2530 | - EC-driven system wakeups |
Daniel Drake | 7feda8e | 2011-06-25 17:34:12 +0100 | [diff] [blame] | 2531 | - Power button |
Daniel Drake | 7bc74b3 | 2011-06-25 17:34:14 +0100 | [diff] [blame] | 2532 | - Ebook switch |
Daniel Drake | 2cf2bae | 2011-06-25 17:34:15 +0100 | [diff] [blame] | 2533 | - Lid switch |
Daniel Drake | e1040ac | 2011-06-25 17:34:16 +0100 | [diff] [blame] | 2534 | - AC adapter status updates |
| 2535 | - Battery status updates |
Daniel Drake | 7feda8e | 2011-06-25 17:34:12 +0100 | [diff] [blame] | 2536 | |
Daniel Drake | a0f30f5 | 2011-06-25 17:34:18 +0100 | [diff] [blame] | 2537 | config OLPC_XO15_SCI |
| 2538 | bool "OLPC XO-1.5 SCI extras" |
Daniel Drake | d8d01a6 | 2011-07-24 18:33:21 +0100 | [diff] [blame] | 2539 | depends on OLPC && ACPI |
| 2540 | select POWER_SUPPLY |
Daniel Drake | a0f30f5 | 2011-06-25 17:34:18 +0100 | [diff] [blame] | 2541 | ---help--- |
| 2542 | Add support for SCI-based features of the OLPC XO-1.5 laptop: |
| 2543 | - EC-driven system wakeups |
| 2544 | - AC adapter status updates |
| 2545 | - Battery status updates |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2546 | |
Ed Wildgoose | d4f3e35 | 2011-09-20 14:00:12 -0700 | [diff] [blame] | 2547 | config ALIX |
| 2548 | bool "PCEngines ALIX System Support (LED setup)" |
| 2549 | select GPIOLIB |
| 2550 | ---help--- |
| 2551 | This option enables system support for the PCEngines ALIX. |
| 2552 | At present this just sets up LEDs for GPIO control on |
| 2553 | ALIX2/3/6 boards. However, other system specific setup should |
| 2554 | get added here. |
| 2555 | |
| 2556 | Note: You must still enable the drivers for GPIO and LED support |
| 2557 | (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs |
| 2558 | |
| 2559 | Note: You have to set alix.force=1 for boards with Award BIOS. |
| 2560 | |
Philip Prindeville | da4e330 | 2012-03-05 15:05:15 -0800 | [diff] [blame] | 2561 | config NET5501 |
| 2562 | bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)" |
| 2563 | select GPIOLIB |
| 2564 | ---help--- |
| 2565 | This option enables system support for the Soekris Engineering net5501. |
| 2566 | |
Philip A. Prindeville | 3197059 | 2012-01-14 01:45:39 -0700 | [diff] [blame] | 2567 | config GEOS |
| 2568 | bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)" |
| 2569 | select GPIOLIB |
| 2570 | depends on DMI |
| 2571 | ---help--- |
| 2572 | This option enables system support for the Traverse Technologies GEOS. |
| 2573 | |
Vivien Didelot | 7d02912 | 2013-01-04 16:18:14 -0500 | [diff] [blame] | 2574 | config TS5500 |
| 2575 | bool "Technologic Systems TS-5500 platform support" |
| 2576 | depends on MELAN |
| 2577 | select CHECK_SIGNATURE |
| 2578 | select NEW_LEDS |
| 2579 | select LEDS_CLASS |
| 2580 | ---help--- |
| 2581 | This option enables system support for the Technologic Systems TS-5500. |
| 2582 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2583 | endif # X86_32 |
| 2584 | |
Andreas Herrmann | 23ac4ae | 2010-09-17 18:03:43 +0200 | [diff] [blame] | 2585 | config AMD_NB |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2586 | def_bool y |
Borislav Petkov | 0e152cd | 2010-03-12 15:43:03 +0100 | [diff] [blame] | 2587 | depends on CPU_SUP_AMD && PCI |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2588 | |
| 2589 | source "drivers/pcmcia/Kconfig" |
| 2590 | |
| 2591 | source "drivers/pci/hotplug/Kconfig" |
| 2592 | |
Alexandre Bounine | 388b78a | 2011-03-23 16:43:03 -0700 | [diff] [blame] | 2593 | config RAPIDIO |
Alexandre Bounine | fdf90ab | 2013-07-03 15:08:56 -0700 | [diff] [blame] | 2594 | tristate "RapidIO support" |
Alexandre Bounine | 388b78a | 2011-03-23 16:43:03 -0700 | [diff] [blame] | 2595 | depends on PCI |
| 2596 | default n |
| 2597 | help |
Alexandre Bounine | fdf90ab | 2013-07-03 15:08:56 -0700 | [diff] [blame] | 2598 | If enabled this option will include drivers and the core |
Alexandre Bounine | 388b78a | 2011-03-23 16:43:03 -0700 | [diff] [blame] | 2599 | infrastructure code to support RapidIO interconnect devices. |
| 2600 | |
| 2601 | source "drivers/rapidio/Kconfig" |
| 2602 | |
David Herrmann | e3263ab | 2013-08-02 14:05:22 +0200 | [diff] [blame] | 2603 | config X86_SYSFB |
| 2604 | bool "Mark VGA/VBE/EFI FB as generic system framebuffer" |
| 2605 | help |
| 2606 | Firmwares often provide initial graphics framebuffers so the BIOS, |
| 2607 | bootloader or kernel can show basic video-output during boot for |
| 2608 | user-guidance and debugging. Historically, x86 used the VESA BIOS |
| 2609 | Extensions and EFI-framebuffers for this, which are mostly limited |
| 2610 | to x86. |
| 2611 | This option, if enabled, marks VGA/VBE/EFI framebuffers as generic |
| 2612 | framebuffers so the new generic system-framebuffer drivers can be |
| 2613 | used on x86. If the framebuffer is not compatible with the generic |
| 2614 | modes, it is adverticed as fallback platform framebuffer so legacy |
| 2615 | drivers like efifb, vesafb and uvesafb can pick it up. |
| 2616 | If this option is not selected, all system framebuffers are always |
| 2617 | marked as fallback platform framebuffers as usual. |
| 2618 | |
| 2619 | Note: Legacy fbdev drivers, including vesafb, efifb, uvesafb, will |
| 2620 | not be able to pick up generic system framebuffers if this option |
| 2621 | is selected. You are highly encouraged to enable simplefb as |
| 2622 | replacement if you select this option. simplefb can correctly deal |
| 2623 | with generic system framebuffers. But you should still keep vesafb |
| 2624 | and others enabled as fallback if a system framebuffer is |
| 2625 | incompatible with simplefb. |
| 2626 | |
| 2627 | If unsure, say Y. |
| 2628 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2629 | endmenu |
| 2630 | |
| 2631 | |
| 2632 | menu "Executable file formats / Emulations" |
| 2633 | |
| 2634 | source "fs/Kconfig.binfmt" |
| 2635 | |
| 2636 | config IA32_EMULATION |
| 2637 | bool "IA32 Emulation" |
| 2638 | depends on X86_64 |
Randy Dunlap | d160399 | 2013-06-18 12:33:40 -0700 | [diff] [blame] | 2639 | select BINFMT_ELF |
Roland McGrath | a97f52e | 2008-01-30 13:31:55 +0100 | [diff] [blame] | 2640 | select COMPAT_BINFMT_ELF |
Brian Gerst | 3bead55 | 2015-06-22 07:55:19 -0400 | [diff] [blame] | 2641 | select ARCH_WANT_OLD_COMPAT_IPC |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2642 | ---help--- |
H. J. Lu | 5fd92e6 | 2012-02-19 10:40:03 -0800 | [diff] [blame] | 2643 | Include code to run legacy 32-bit programs under a |
| 2644 | 64-bit kernel. You should likely turn this on, unless you're |
| 2645 | 100% sure that you don't have any 32-bit programs left. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2646 | |
| 2647 | config IA32_AOUT |
Ingo Molnar | 8f9ca47 | 2009-02-05 16:21:53 +0100 | [diff] [blame] | 2648 | tristate "IA32 a.out support" |
| 2649 | depends on IA32_EMULATION |
| 2650 | ---help--- |
| 2651 | Support old a.out binaries in the 32bit emulation. |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2652 | |
H. Peter Anvin | 0bf6276 | 2012-02-27 14:09:10 -0800 | [diff] [blame] | 2653 | config X86_X32 |
Kees Cook | 6ea3038 | 2012-10-02 11:16:47 -0700 | [diff] [blame] | 2654 | bool "x32 ABI for 64-bit mode" |
Brian Gerst | 9b54050 | 2015-06-22 07:55:21 -0400 | [diff] [blame] | 2655 | depends on X86_64 |
H. J. Lu | 5fd92e6 | 2012-02-19 10:40:03 -0800 | [diff] [blame] | 2656 | ---help--- |
| 2657 | Include code to run binaries for the x32 native 32-bit ABI |
| 2658 | for 64-bit processors. An x32 process gets access to the |
| 2659 | full 64-bit register file and wide data path while leaving |
| 2660 | pointers at 32 bits for smaller memory footprint. |
| 2661 | |
| 2662 | You will need a recent binutils (2.22 or later) with |
| 2663 | elf32_x86_64 support enabled to compile a kernel with this |
| 2664 | option set. |
| 2665 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2666 | config COMPAT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2667 | def_bool y |
H. Peter Anvin | 0bf6276 | 2012-02-27 14:09:10 -0800 | [diff] [blame] | 2668 | depends on IA32_EMULATION || X86_X32 |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2669 | |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 2670 | if COMPAT |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2671 | config COMPAT_FOR_U64_ALIGNMENT |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 2672 | def_bool y |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2673 | |
| 2674 | config SYSVIPC_COMPAT |
Harvey Harrison | 3c2362e | 2008-01-30 13:31:03 +0100 | [diff] [blame] | 2675 | def_bool y |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 2676 | depends on SYSVIPC |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2677 | |
David Howells | ee009e4a0 | 2011-03-07 15:06:20 +0000 | [diff] [blame] | 2678 | config KEYS_COMPAT |
Jan Beulich | 3120e25 | 2012-09-10 12:41:45 +0100 | [diff] [blame] | 2679 | def_bool y |
| 2680 | depends on KEYS |
| 2681 | endif |
David Howells | ee009e4a0 | 2011-03-07 15:06:20 +0000 | [diff] [blame] | 2682 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2683 | endmenu |
| 2684 | |
| 2685 | |
Keith Packard | e5beae1 | 2008-11-03 18:21:45 +0100 | [diff] [blame] | 2686 | config HAVE_ATOMIC_IOMAP |
| 2687 | def_bool y |
| 2688 | depends on X86_32 |
| 2689 | |
Alessandro Rubini | 4692d77 | 2012-04-04 19:39:58 +0200 | [diff] [blame] | 2690 | config X86_DEV_DMA_OPS |
| 2691 | bool |
Alessandro Rubini | 83125a3 | 2012-04-04 19:40:21 +0200 | [diff] [blame] | 2692 | depends on X86_64 || STA2X11 |
Alessandro Rubini | 4692d77 | 2012-04-04 19:39:58 +0200 | [diff] [blame] | 2693 | |
Alessandro Rubini | f7219a5 | 2012-04-04 19:40:10 +0200 | [diff] [blame] | 2694 | config X86_DMA_REMAP |
| 2695 | bool |
Alessandro Rubini | 83125a3 | 2012-04-04 19:40:21 +0200 | [diff] [blame] | 2696 | depends on STA2X11 |
Alessandro Rubini | f7219a5 | 2012-04-04 19:40:10 +0200 | [diff] [blame] | 2697 | |
Li, Aubrey | 93e5ead | 2014-06-30 14:08:42 +0800 | [diff] [blame] | 2698 | config PMC_ATOM |
| 2699 | def_bool y |
| 2700 | depends on PCI |
| 2701 | |
Keith Busch | 185a383 | 2016-01-12 13:18:10 -0700 | [diff] [blame] | 2702 | config VMD |
| 2703 | depends on PCI_MSI |
| 2704 | tristate "Volume Management Device Driver" |
| 2705 | default N |
| 2706 | ---help--- |
| 2707 | Adds support for the Intel Volume Management Device (VMD). VMD is a |
| 2708 | secondary PCI host bridge that allows PCI Express root ports, |
| 2709 | and devices attached to them, to be removed from the default |
| 2710 | PCI domain and placed within the VMD domain. This provides |
| 2711 | more bus resources than are otherwise possible with a |
| 2712 | single domain. If you know your system provides one of these and |
| 2713 | has devices attached to it, say Y; if you are not sure, say N. |
| 2714 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2715 | source "net/Kconfig" |
| 2716 | |
| 2717 | source "drivers/Kconfig" |
| 2718 | |
| 2719 | source "drivers/firmware/Kconfig" |
| 2720 | |
| 2721 | source "fs/Kconfig" |
| 2722 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2723 | source "arch/x86/Kconfig.debug" |
| 2724 | |
| 2725 | source "security/Kconfig" |
| 2726 | |
| 2727 | source "crypto/Kconfig" |
| 2728 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 2729 | source "arch/x86/kvm/Kconfig" |
| 2730 | |
Sam Ravnborg | e279b6c | 2007-11-06 20:41:05 +0100 | [diff] [blame] | 2731 | source "lib/Kconfig" |