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arch/x86/Kconfig
94.1 KB
b24413180 License cleanup: ... |
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# SPDX-License-Identifier: GPL-2.0 |
daa93fab8 x86: enable "make... |
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# Select 32 or 64 bit config 64BIT |
104daea14 kconfig: referenc... |
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bool "64-bit kernel" if "$(ARCH)" = "x86" default "$(ARCH)" != "i386" |
a7f7f6248 treewide: replace... |
6 |
help |
daa93fab8 x86: enable "make... |
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Say yes to build a 64-bit kernel - formerly known as x86_64 Say no to build a 32-bit kernel - formerly known as i386 config X86_32 |
3120e25ef x86/Kconfig: Clea... |
11 12 |
def_bool y depends on !64BIT |
341c787e3 x86/kconfig: Move... |
13 14 15 16 |
# Options that are inherently 32-bit kernel only: select ARCH_WANT_IPC_PARSE_VERSION select CLKSRC_I8253 select CLONE_BACKWARDS |
117ed4548 x86/irq/64: Remov... |
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select HAVE_DEBUG_STACKOVERFLOW |
341c787e3 x86/kconfig: Move... |
18 19 |
select MODULES_USE_ELF_REL select OLD_SIGACTION |
7ac870747 x86/vdso: Switch ... |
20 |
select GENERIC_VDSO_32 |
797335659 fanotify: Fix sys... |
21 |
select ARCH_SPLIT_ARG64 |
daa93fab8 x86: enable "make... |
22 23 |
config X86_64 |
3120e25ef x86/Kconfig: Clea... |
24 25 |
def_bool y depends on 64BIT |
d94e06857 x86/kconfig: Move... |
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# Options that are inherently 64-bit kernel only: |
4eb0716e8 hugetlb: allow to... |
27 |
select ARCH_HAS_GIGANTIC_PAGE |
c12d3362a int128: move __ui... |
28 |
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 |
d94e06857 x86/kconfig: Move... |
29 30 31 |
select ARCH_USE_CMPXCHG_LOCKREF select HAVE_ARCH_SOFT_DIRTY select MODULES_USE_ELF_RELA |
f616ab59c dma-mapping: move... |
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select NEED_DMA_MAP_STATE |
09230cbc1 swiotlb: move the... |
33 |
select SWIOTLB |
1032c0ba9 x86: arch/x86/Kco... |
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|
518049d9d ftrace/x86_32: Re... |
35 36 37 38 39 40 41 42 43 44 45 |
config FORCE_DYNAMIC_FTRACE def_bool y depends on X86_32 depends on FUNCTION_TRACER select DYNAMIC_FTRACE help We keep the static function tracing (!DYNAMIC_FTRACE) around in order to test the non static function tracing in the generic code, as other architectures still use it. But we only need to keep it around for x86_64. No need to keep it for x86_32. For x86_32, force DYNAMIC_FTRACE. |
d94e06857 x86/kconfig: Move... |
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# # Arch settings # # ( Note that options that are marked 'if X86_64' could in principle be # ported to 32-bit as well. ) # |
8d5fffb92 x86: move all sim... |
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config X86 |
3c2362e62 x86: use def_bool... |
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def_bool y |
c763ea265 x86/kconfig: Sort... |
54 55 56 |
# # Note: keep this list sorted alphabetically # |
6471b825c x86/kconfig: Reor... |
57 58 |
select ACPI_LEGACY_TABLES_LOOKUP if ACPI select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI |
942fa985e 32-bit userspace ... |
59 |
select ARCH_32BIT_OFF_T if X86_32 |
2a21ad571 x86/time: Impleme... |
60 |
select ARCH_CLOCKSOURCE_INIT |
c763ea265 x86/kconfig: Sort... |
61 |
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI |
fa5b6ec9e lib/Kconfig.debug... |
62 |
select ARCH_HAS_DEBUG_VIRTUAL |
399145f9e mm/debug: add tes... |
63 |
select ARCH_HAS_DEBUG_VM_PGTABLE if !X86_PAE |
21266be9e arch: consolidate... |
64 |
select ARCH_HAS_DEVMEM_IS_ALLOWED |
b1a57bbfc kgdb: Delay "kgdb... |
65 |
select ARCH_HAS_EARLY_DEBUG if KGDB |
6471b825c x86/kconfig: Reor... |
66 |
select ARCH_HAS_ELF_RANDOMIZE |
72d931046 Make ARCH_HAS_FAS... |
67 |
select ARCH_HAS_FAST_MULTIPLIER |
316d097c4 x86/pti: Filter a... |
68 |
select ARCH_HAS_FILTER_PGPROT |
6974f0c45 include/linux/str... |
69 |
select ARCH_HAS_FORTIFY_SOURCE |
957e3facd gcov: enable GCOV... |
70 |
select ARCH_HAS_GCOV_PROFILE_ALL |
0f1441b44 objtool: Fix noin... |
71 |
select ARCH_HAS_KCOV if X86_64 && STACK_VALIDATION |
0c9c1d563 x86, s390: Move A... |
72 |
select ARCH_HAS_MEM_ENCRYPT |
10bcc80e9 membarrier/x86: P... |
73 |
select ARCH_HAS_MEMBARRIER_SYNC_CORE |
0ebeea8ca bpf: Restrict bpf... |
74 |
select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
c763ea265 x86/kconfig: Sort... |
75 |
select ARCH_HAS_PMEM_API if X86_64 |
175967318 mm: introduce ARC... |
76 |
select ARCH_HAS_PTE_DEVMAP if X86_64 |
3010a5ea6 mm: introduce ARC... |
77 |
select ARCH_HAS_PTE_SPECIAL |
0aed55af8 x86, uaccess: int... |
78 |
select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 |
ec6347bb4 x86, powerpc: Ren... |
79 |
select ARCH_HAS_COPY_MC if X86_64 |
d2852a224 arch: add ARCH_HA... |
80 |
select ARCH_HAS_SET_MEMORY |
d253ca0c3 x86/mm/cpa: Add s... |
81 |
select ARCH_HAS_SET_DIRECT_MAP |
ad21fc4fa arch: Move CONFIG... |
82 83 |
select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX |
ac1ab12a3 lockin/x86: Imple... |
84 |
select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE |
25c619e59 x86/entry/32: Ena... |
85 |
select ARCH_HAS_SYSCALL_WRAPPER |
c6d308534 UBSAN: run-time u... |
86 |
select ARCH_HAS_UBSAN_SANITIZE_ALL |
7e01ccb43 x86: mm: use ARCH... |
87 |
select ARCH_HAS_DEBUG_WX |
6471b825c x86/kconfig: Reor... |
88 89 |
select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI |
77fbbc811 x86: select ARCH_... |
90 |
select ARCH_MIGHT_HAVE_PC_PARPORT |
5e2c18c0e Input: i8042 - se... |
91 |
select ARCH_MIGHT_HAVE_PC_SERIO |
3599fe12a x86/stacktrace: U... |
92 |
select ARCH_STACKWALK |
2c870e611 arm64: fix ACPI d... |
93 |
select ARCH_SUPPORTS_ACPI |
6471b825c x86/kconfig: Reor... |
94 |
select ARCH_SUPPORTS_ATOMIC_RMW |
6471b825c x86/kconfig: Reor... |
95 |
select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 |
bb613f1c2 FROMLIST: x86, bu... |
96 97 |
select ARCH_SUPPORTS_LTO_CLANG if X86_64 select ARCH_SUPPORTS_LTO_CLANG_THIN if X86_64 |
6471b825c x86/kconfig: Reor... |
98 |
select ARCH_USE_BUILTIN_BSWAP |
6471b825c x86/kconfig: Reor... |
99 100 |
select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS |
2ce0d7f97 x86/asm: Provide ... |
101 |
select ARCH_USE_SYM_ANNOTATIONS |
ce4a4e565 x86/mm: Remove th... |
102 |
select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH |
81c22041d bpf, x86, arm64: ... |
103 |
select ARCH_WANT_DEFAULT_BPF_JIT if X86_64 |
c763ea265 x86/kconfig: Sort... |
104 |
select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
3876d4a38 x86, arm64: Move ... |
105 |
select ARCH_WANT_HUGE_PMD_SHARE |
59612b24f kbuild: Hoist '--... |
106 |
select ARCH_WANT_LD_ORPHAN_WARN |
38d8b4e6b mm, THP, swap: de... |
107 |
select ARCH_WANTS_THP_SWAP if X86_64 |
109167063 scripts/sorttable... |
108 |
select BUILDTIME_TABLE_SORT |
6471b825c x86/kconfig: Reor... |
109 |
select CLKEVT_I8253 |
6471b825c x86/kconfig: Reor... |
110 111 |
select CLOCKSOURCE_VALIDATE_LAST_CYCLE select CLOCKSOURCE_WATCHDOG |
6471b825c x86/kconfig: Reor... |
112 |
select DCACHE_WORD_ACCESS |
45471cd98 Merge tag 'edac_f... |
113 114 |
select EDAC_ATOMIC_SCRUB select EDAC_SUPPORT |
6471b825c x86/kconfig: Reor... |
115 116 117 118 119 |
select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) select GENERIC_CLOCKEVENTS_MIN_ADJUST select GENERIC_CMOS_UPDATE select GENERIC_CPU_AUTOPROBE |
61dc0f555 x86/cpu: Implemen... |
120 |
select GENERIC_CPU_VULNERABILITIES |
5b7c73e00 x86: use generic ... |
121 |
select GENERIC_EARLY_IOREMAP |
27d6b4d14 x86/entry: Use ge... |
122 |
select GENERIC_ENTRY |
6471b825c x86/kconfig: Reor... |
123 124 |
select GENERIC_FIND_FIRST_BIT select GENERIC_IOMAP |
c7d6c9dd8 x86/apic: Impleme... |
125 |
select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP |
0fa115da4 x86/irq/vector: I... |
126 |
select GENERIC_IRQ_MATRIX_ALLOCATOR if X86_LOCAL_APIC |
ad7a929fa x86/irq: Use irq_... |
127 |
select GENERIC_IRQ_MIGRATION if SMP |
6471b825c x86/kconfig: Reor... |
128 |
select GENERIC_IRQ_PROBE |
c201c9179 x86/vector/msi: S... |
129 |
select GENERIC_IRQ_RESERVATION_MODE |
6471b825c x86/kconfig: Reor... |
130 131 |
select GENERIC_IRQ_SHOW select GENERIC_PENDING_IRQ if SMP |
2ae27137b x86: mm: convert ... |
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select GENERIC_PTDUMP |
6471b825c x86/kconfig: Reor... |
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select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select GENERIC_TIME_VSYSCALL |
7ac870747 x86/vdso: Switch ... |
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select GENERIC_GETTIMEOFDAY |
550a77a74 x86/vdso: Add tim... |
138 |
select GENERIC_VDSO_TIME_NS |
39656e83d mm: lift the x86_... |
139 |
select GUP_GET_PTE_LOW_HIGH if X86_PAE |
17e5888e4 x86: Select HARDI... |
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select HARDIRQS_SW_RESEND |
7edaeb684 kernel/watchdog: ... |
141 |
select HARDLOCKUP_CHECK_TIMESTAMP if X86_64 |
6471b825c x86/kconfig: Reor... |
142 143 144 |
select HAVE_ACPI_APEI if ACPI select HAVE_ACPI_APEI_NMI if ACPI select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
6471b825c x86/kconfig: Reor... |
145 146 147 |
select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE select HAVE_ARCH_JUMP_LABEL |
b34006c42 x86/jump_table: U... |
148 |
select HAVE_ARCH_JUMP_LABEL_RELATIVE |
d17a1d97d x86/mm/kasan: don... |
149 |
select HAVE_ARCH_KASAN if X86_64 |
0609ae011 x86/kasan: suppor... |
150 |
select HAVE_ARCH_KASAN_VMALLOC if X86_64 |
6471b825c x86/kconfig: Reor... |
151 |
select HAVE_ARCH_KGDB |
9e08f57d6 x86: mm: support ... |
152 153 |
select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT |
1b028f784 x86/mm: Introduce... |
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select HAVE_ARCH_COMPAT_MMAP_BASES if MMU && COMPAT |
271ca7887 arch: enable rela... |
155 |
select HAVE_ARCH_PREL32_RELOCATIONS |
6471b825c x86/kconfig: Reor... |
156 |
select HAVE_ARCH_SECCOMP_FILTER |
f7d83c1cf x86: Implement th... |
157 |
select HAVE_ARCH_THREAD_STRUCT_WHITELIST |
afaef01c0 x86/entry: Add ST... |
158 |
select HAVE_ARCH_STACKLEAK |
6471b825c x86/kconfig: Reor... |
159 160 |
select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
a00cc7d9d mm, x86: add supp... |
161 |
select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64 |
b64d8d1e1 mm/userfaultfd: d... |
162 |
select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD |
e37e43a49 x86/mm/64: Enable... |
163 |
select HAVE_ARCH_VMAP_STACK if X86_64 |
c763ea265 x86/kconfig: Sort... |
164 |
select HAVE_ARCH_WITHIN_STACK_FRAMES |
2ff2b7ec6 kbuild: add CONFI... |
165 |
select HAVE_ASM_MODVERSIONS |
6471b825c x86/kconfig: Reor... |
166 167 168 |
select HAVE_CMPXCHG_DOUBLE select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING if X86_64 |
cf4db2597 ftrace: Rename co... |
169 |
select HAVE_C_RECORDMCOUNT |
78a2549ec FROMLIST: x86, bu... |
170 |
select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION |
6471b825c x86/kconfig: Reor... |
171 |
select HAVE_DEBUG_KMEMLEAK |
6471b825c x86/kconfig: Reor... |
172 |
select HAVE_DMA_CONTIGUOUS |
677aa9f77 ftrace: add have ... |
173 |
select HAVE_DYNAMIC_FTRACE |
06aeaaeab ftrace: Move ARCH... |
174 |
select HAVE_DYNAMIC_FTRACE_WITH_REGS |
562955fe6 ftrace/x86: Add r... |
175 |
select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS |
03f5781be bpf, x86_32: add ... |
176 |
select HAVE_EBPF_JIT |
58340a07c introduce HAVE_EF... |
177 |
select HAVE_EFFICIENT_UNALIGNED_ACCESS |
6630a8e50 eisa: consolidate... |
178 |
select HAVE_EISA |
5f56a5dfd exit_thread: remo... |
179 |
select HAVE_EXIT_THREAD |
67a929e09 mm: rename CONFIG... |
180 |
select HAVE_FAST_GUP |
644e0e8dc x86/ftrace: Add -... |
181 |
select HAVE_FENTRY if X86_64 || DYNAMIC_FTRACE |
6471b825c x86/kconfig: Reor... |
182 |
select HAVE_FTRACE_MCOUNT_RECORD |
6471b825c x86/kconfig: Reor... |
183 184 |
select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER |
6b90bd4ba GCC plugin infras... |
185 |
select HAVE_GCC_PLUGINS |
6471b825c x86/kconfig: Reor... |
186 187 188 |
select HAVE_HW_BREAKPOINT select HAVE_IDE select HAVE_IOREMAP_PROT |
6471b825c x86/kconfig: Reor... |
189 |
select HAVE_IRQ_TIME_ACCOUNTING |
2e9f3bddc bzip2/lzma: make ... |
190 |
select HAVE_KERNEL_BZIP2 |
6471b825c x86/kconfig: Reor... |
191 192 |
select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZ4 |
2e9f3bddc bzip2/lzma: make ... |
193 |
select HAVE_KERNEL_LZMA |
13510997d x86: add support ... |
194 |
select HAVE_KERNEL_LZO |
6471b825c x86/kconfig: Reor... |
195 |
select HAVE_KERNEL_XZ |
fb46d057d x86: Add support ... |
196 |
select HAVE_KERNEL_ZSTD |
6471b825c x86/kconfig: Reor... |
197 198 |
select HAVE_KPROBES select HAVE_KPROBES_ON_FTRACE |
540adea38 error-injection: ... |
199 |
select HAVE_FUNCTION_ERROR_INJECTION |
6471b825c x86/kconfig: Reor... |
200 201 202 |
select HAVE_KRETPROBES select HAVE_KVM select HAVE_LIVEPATCH if X86_64 |
0102752e4 hw-breakpoints: S... |
203 |
select HAVE_MIXED_BREAKPOINTS_REGS |
ee9f8fce9 x86/unwind: Add t... |
204 |
select HAVE_MOD_ARCH_SPECIFIC |
9f132f7e1 mm: select HAVE_M... |
205 |
select HAVE_MOVE_PMD |
42a0bb3f7 printk/nmi: gener... |
206 |
select HAVE_NMI |
6471b825c x86/kconfig: Reor... |
207 208 209 210 |
select HAVE_OPROFILE select HAVE_OPTPROBES select HAVE_PCSPKR_PLATFORM select HAVE_PERF_EVENTS |
c01d43233 lockup_detector: ... |
211 |
select HAVE_PERF_EVENTS_NMI |
92e5aae45 kernel/watchdog: ... |
212 |
select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI |
eb01d42a7 PCI: consolidate ... |
213 |
select HAVE_PCI |
c5e63197d perf: Unified API... |
214 |
select HAVE_PERF_REGS |
c5ebcedb5 perf: Add ability... |
215 |
select HAVE_PERF_USER_STACK_DUMP |
ff2e6d725 asm-generic/tlb: ... |
216 |
select MMU_GATHER_RCU_TABLE_FREE if PARAVIRT |
009980855 x86: Select POSIX... |
217 |
select HAVE_POSIX_CPU_TIMERS_TASK_WORK |
6471b825c x86/kconfig: Reor... |
218 |
select HAVE_REGS_AND_STACK_ACCESS_API |
6415b38ba x86/stacktrace: E... |
219 |
select HAVE_RELIABLE_STACKTRACE if X86_64 && (UNWINDER_FRAME_POINTER || UNWINDER_ORC) && STACK_VALIDATION |
3c88ee194 x86: ptrace: Add ... |
220 |
select HAVE_FUNCTION_ARG_ACCESS_API |
d148eac0e Kbuild: rename HA... |
221 |
select HAVE_STACKPROTECTOR if CC_HAS_SANE_STACKPROTECTOR |
c763ea265 x86/kconfig: Sort... |
222 |
select HAVE_STACK_VALIDATION if X86_64 |
e6d6c071f x86/static_call: ... |
223 |
select HAVE_STATIC_CALL |
1e7e47883 x86/static_call: ... |
224 |
select HAVE_STATIC_CALL_INLINE if HAVE_STACK_VALIDATION |
d6761b8fd x86: Add support ... |
225 |
select HAVE_RSEQ |
6471b825c x86/kconfig: Reor... |
226 |
select HAVE_SYSCALL_TRACEPOINTS |
6471b825c x86/kconfig: Reor... |
227 |
select HAVE_UNSTABLE_SCHED_CLOCK |
7c68af6e3 core, x86: Add us... |
228 |
select HAVE_USER_RETURN_NOTIFIER |
7ac870747 x86/vdso: Switch ... |
229 |
select HAVE_GENERIC_VDSO |
05736e4ac cpu/hotplug: Prov... |
230 |
select HOTPLUG_SMT if SMP |
c0185808e x86: Enable force... |
231 |
select IRQ_FORCED_THREADING |
86596f0a2 scatterlist: move... |
232 |
select NEED_SG_DMA_LENGTH |
2eac9c2df PCI: consolidate ... |
233 |
select PCI_DOMAINS if PCI |
625210cfa x86/Kconfig: Sele... |
234 |
select PCI_LOCKLESS_CONFIG if PCI |
6471b825c x86/kconfig: Reor... |
235 |
select PERF_EVENTS |
3195ef59c x86: Do full rtc ... |
236 |
select RTC_LIB |
d6faca40f rtc: move mc14681... |
237 |
select RTC_MC146818_LIB |
6471b825c x86/kconfig: Reor... |
238 |
select SPARSE_IRQ |
83fe27ea5 rcu: Make SRCU op... |
239 |
select SRCU |
1e7e47883 x86/static_call: ... |
240 |
select STACK_VALIDATION if HAVE_STACK_VALIDATION && (HAVE_STATIC_CALL_INLINE || RETPOLINE) |
6471b825c x86/kconfig: Reor... |
241 |
select SYSCTL_EXCEPTION_TRACE |
15f4eae70 x86: Move thread_... |
242 |
select THREAD_INFO_IN_TASK |
6471b825c x86/kconfig: Reor... |
243 244 |
select USER_STACKTRACE_SUPPORT select VIRT_TO_BUS |
3b02a051d Merge tag 'v5.7-r... |
245 |
select HAVE_ARCH_KCSAN if X86_64 |
6471b825c x86/kconfig: Reor... |
246 |
select X86_FEATURE_NAMES if PROC_FS |
0c608dad2 x86/process: Add ... |
247 |
select PROC_PID_ARCH_STATUS if PROC_FS |
9e2b4be37 ima: add a new CO... |
248 |
imply IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI |
7d8330a56 KVM is not seen u... |
249 |
|
ba7e4d13f perf, x86: Add IN... |
250 |
config INSTRUCTION_DECODER |
3120e25ef x86/Kconfig: Clea... |
251 252 |
def_bool y depends on KPROBES || PERF_EVENTS || UPROBES |
ba7e4d13f perf, x86: Add IN... |
253 |
|
51b26ada7 x86: unify arch/x... |
254 255 256 257 |
config OUTPUT_FORMAT string default "elf32-i386" if X86_32 default "elf64-x86-64" if X86_64 |
8d5fffb92 x86: move all sim... |
258 |
config LOCKDEP_SUPPORT |
3c2362e62 x86: use def_bool... |
259 |
def_bool y |
8d5fffb92 x86: move all sim... |
260 261 |
config STACKTRACE_SUPPORT |
3c2362e62 x86: use def_bool... |
262 |
def_bool y |
8d5fffb92 x86: move all sim... |
263 |
|
8d5fffb92 x86: move all sim... |
264 |
config MMU |
3c2362e62 x86: use def_bool... |
265 |
def_bool y |
8d5fffb92 x86: move all sim... |
266 |
|
9e08f57d6 x86: mm: support ... |
267 268 269 270 271 272 273 274 275 276 277 278 279 |
config ARCH_MMAP_RND_BITS_MIN default 28 if 64BIT default 8 config ARCH_MMAP_RND_BITS_MAX default 32 if 64BIT default 16 config ARCH_MMAP_RND_COMPAT_BITS_MIN default 8 config ARCH_MMAP_RND_COMPAT_BITS_MAX default 16 |
8d5fffb92 x86: move all sim... |
280 281 282 283 |
config SBUS bool config GENERIC_ISA_DMA |
3120e25ef x86/Kconfig: Clea... |
284 285 |
def_bool y depends on ISA_DMA_API |
8d5fffb92 x86: move all sim... |
286 |
|
8d5fffb92 x86: move all sim... |
287 |
config GENERIC_BUG |
3c2362e62 x86: use def_bool... |
288 |
def_bool y |
8d5fffb92 x86: move all sim... |
289 |
depends on BUG |
b93a531e3 allow bug table e... |
290 291 292 293 |
select GENERIC_BUG_RELATIVE_POINTERS if X86_64 config GENERIC_BUG_RELATIVE_POINTERS bool |
8d5fffb92 x86: move all sim... |
294 |
|
8d5fffb92 x86: move all sim... |
295 |
config ARCH_MAY_HAVE_PC_FDC |
3120e25ef x86/Kconfig: Clea... |
296 297 |
def_bool y depends on ISA_DMA_API |
8d5fffb92 x86: move all sim... |
298 |
|
1032c0ba9 x86: arch/x86/Kco... |
299 300 |
config GENERIC_CALIBRATE_DELAY def_bool y |
9a0b84158 cpuidle: Add a po... |
301 302 |
config ARCH_HAS_CPU_RELAX def_bool y |
1b27d05b6 mm: move cache_li... |
303 304 |
config ARCH_HAS_CACHE_LINE_SIZE def_bool y |
316d097c4 x86/pti: Filter a... |
305 306 |
config ARCH_HAS_FILTER_PGPROT def_bool y |
dd5af90a7 x86/non-x86: perc... |
307 |
config HAVE_SETUP_PER_CPU_AREA |
89c9c4c58 x86: make Voyager... |
308 |
def_bool y |
b32ef636a percpu: use a kco... |
309 |
|
08fc45806 percpu: build fir... |
310 311 312 313 |
config NEED_PER_CPU_EMBED_FIRST_CHUNK def_bool y config NEED_PER_CPU_PAGE_FIRST_CHUNK |
11124411a x86: convert to t... |
314 |
def_bool y |
801e4062f Hibernation: Clea... |
315 316 |
config ARCH_HIBERNATION_POSSIBLE def_bool y |
801e4062f Hibernation: Clea... |
317 |
|
f4cb57007 Suspend: Clean up... |
318 319 |
config ARCH_SUSPEND_POSSIBLE def_bool y |
f4cb57007 Suspend: Clean up... |
320 |
|
53313b2c9 x86: mm: Remove g... |
321 322 |
config ARCH_WANT_GENERAL_HUGETLB def_bool y |
8d5fffb92 x86: move all sim... |
323 |
config ZONE_DMA32 |
e0fd24a3b x86/Kconfig: Avoi... |
324 |
def_bool y if X86_64 |
8d5fffb92 x86: move all sim... |
325 |
|
8d5fffb92 x86: move all sim... |
326 |
config AUDIT_ARCH |
e0fd24a3b x86/Kconfig: Avoi... |
327 |
def_bool y if X86_64 |
8d5fffb92 x86: move all sim... |
328 |
|
6a11f75b6 generic debug pag... |
329 330 |
config ARCH_SUPPORTS_DEBUG_PAGEALLOC def_bool y |
d6f2d75a7 x86/kasan: Move K... |
331 332 333 334 |
config KASAN_SHADOW_OFFSET hex depends on KASAN default 0xdffffc0000000000 |
69575d388 x86, intel_txt: c... |
335 336 |
config HAVE_INTEL_TXT def_bool y |
6ea303864 arch/x86: remove ... |
337 |
depends on INTEL_IOMMU && ACPI |
69575d388 x86, intel_txt: c... |
338 |
|
6b0c3d44d x86: unify arch/x... |
339 340 341 342 343 344 345 |
config X86_32_SMP def_bool y depends on X86_32 && SMP config X86_64_SMP def_bool y depends on X86_64 && SMP |
ccbeed3a0 x86: make lazy %g... |
346 347 |
config X86_32_LAZY_GS def_bool y |
8458f8c2d x86: fix dependen... |
348 |
depends on X86_32 && !STACKPROTECTOR |
ccbeed3a0 x86: make lazy %g... |
349 |
|
2b1444983 uprobes, mm, x86:... |
350 351 |
config ARCH_SUPPORTS_UPROBES def_bool y |
d20642f0a x86: move FIX_EAR... |
352 353 |
config FIX_EARLYCON_MEM def_bool y |
94d49eb30 x86/mm: Decouple ... |
354 355 |
config DYNAMIC_PHYSICAL_MASK bool |
982333683 x86: expose numbe... |
356 357 |
config PGTABLE_LEVELS int |
77ef56e4f x86: Enable 5-lev... |
358 |
default 5 if X86_5LEVEL |
982333683 x86: expose numbe... |
359 360 361 |
default 4 if X86_64 default 3 if X86_PAE default 2 |
2a61f4747 stack-protector: ... |
362 363 364 365 366 367 368 |
config CC_HAS_SANE_STACKPROTECTOR bool default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC)) if 64BIT default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC)) help We have to make sure stack protector is unconditionally disabled if the compiler produces broken code. |
506f1d07b x86: move the res... |
369 |
menu "Processor type and features" |
5ee715354 x86/kconfig: Move... |
370 371 372 373 374 375 376 377 378 |
config ZONE_DMA bool "DMA memory allocation support" if EXPERT default y help DMA memory allocation support allows devices with less than 32-bit addressing to allocate within the first 16MB of address space. Disable if no such devices will be used. If unsure, say Y. |
506f1d07b x86: move the res... |
379 380 |
config SMP bool "Symmetric multi-processing support" |
a7f7f6248 treewide: replace... |
381 |
help |
506f1d07b x86: move the res... |
382 |
This enables support for systems with more than one CPU. If you have |
4a4741577 Kconfig: update f... |
383 384 |
a system with only one CPU, say N. If you have a system with more than one CPU, say Y. |
506f1d07b x86: move the res... |
385 |
|
4a4741577 Kconfig: update f... |
386 |
If you say N here, the kernel will run on uni- and multiprocessor |
506f1d07b x86: move the res... |
387 388 |
machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, |
4a4741577 Kconfig: update f... |
389 |
uniprocessor machines. On a uniprocessor machine, the kernel |
506f1d07b x86: move the res... |
390 391 392 393 394 395 396 397 398 399 |
will run faster if you say N here. Note that if you say Y here and choose architecture "586" or "Pentium" under "Processor family", the kernel will not work on 486 architectures. Similarly, multiprocessor kernels for the "PPro" architecture may not work on all Pentium based boards. People using multiprocessor machines who say Y here should also say Y to "Enhanced Real Time Clock Support", below. The "Advanced Power Management" code will be disabled if you say Y here. |
cb1aaebea docs: fix broken ... |
400 |
See also <file:Documentation/x86/i386/IO-APIC.rst>, |
4f4cfa6c5 docs: admin-guide... |
401 |
<file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO available at |
506f1d07b x86: move the res... |
402 403 404 |
<http://www.tldp.org/docs.html#howto>. If you don't know what to do here, say N. |
9def39be4 x86: Support comp... |
405 406 407 |
config X86_FEATURE_NAMES bool "Processor feature human-readable names" if EMBEDDED default y |
a7f7f6248 treewide: replace... |
408 |
help |
9def39be4 x86: Support comp... |
409 410 411 412 413 414 |
This option compiles in a table of x86 feature bits and corresponding names. This is required to support /proc/cpuinfo and a few kernel messages. You can disable this to save space, at the expense of making those few kernel messages show numeric feature bits instead. If in doubt, say Y. |
06cd9a7dc x86: add x2apic c... |
415 416 |
config X86_X2APIC bool "Support x2apic" |
19e3d60d4 x86: Let x2APIC s... |
417 |
depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST) |
a7f7f6248 treewide: replace... |
418 |
help |
06cd9a7dc x86: add x2apic c... |
419 420 421 422 |
This enables x2apic support on CPUs that have this feature. This allows 32-bit apic IDs (so it can support very large systems), and accesses the local apic via MSRs not via mmio. |
06cd9a7dc x86: add x2apic c... |
423 |
If you don't know what to do here, say N. |
6695c85b2 x86: let MPS supp... |
424 |
config X86_MPPARSE |
6e87f9b7e arch/x86/Kconfig:... |
425 |
bool "Enable MPS table" if ACPI || SFI |
7a5276889 x86: simplify X86... |
426 |
default y |
5ab74722a x86, VisWS: turn ... |
427 |
depends on X86_LOCAL_APIC |
a7f7f6248 treewide: replace... |
428 |
help |
6695c85b2 x86: let MPS supp... |
429 430 |
For old smp systems that do not have proper acpi support. Newer systems (esp with 64bit cpus) with acpi support, MADT and DSDT will override it |
6695c85b2 x86: let MPS supp... |
431 |
|
ddd70cf93 goldfish: platfor... |
432 |
config GOLDFISH |
b03b016fe x86/Kconfig: Fix ... |
433 434 |
def_bool y depends on X86_GOLDFISH |
ddd70cf93 goldfish: platfor... |
435 |
|
76b043848 x86/retpoline: Ad... |
436 437 438 439 440 441 442 443 |
config RETPOLINE bool "Avoid speculative indirect branches in kernel" default y help Compile kernel with the retpoline compiler options to guard against kernel-to-user data leaks by avoiding speculative indirect branches. Requires a compiler with -mindirect-branch=thunk-extern support for full protection. The kernel may run slower. |
e6d429313 x86/resctrl: Avoi... |
444 445 |
config X86_CPU_RESCTRL bool "x86 CPU resource control support" |
6fe07ce35 x86/resctrl: Rena... |
446 |
depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD) |
59fe5a77d x86/intel_rdt: Se... |
447 |
select KERNFS |
e79f15a45 x86/resctrl: Add ... |
448 |
select PROC_CPU_RESCTRL if PROC_FS |
78e99b4a2 x86/intel_rdt: Ad... |
449 |
help |
e6d429313 x86/resctrl: Avoi... |
450 |
Enable x86 CPU resource control support. |
6fe07ce35 x86/resctrl: Rena... |
451 452 453 454 455 456 457 458 459 460 461 |
Provide support for the allocation and monitoring of system resources usage by the CPU. Intel calls this Intel Resource Director Technology (Intel(R) RDT). More information about RDT can be found in the Intel x86 Architecture Software Developer Manual. AMD calls this AMD Platform Quality of Service (AMD QoS). More information about AMD QoS can be found in the AMD64 Technology Platform Quality of Service Extensions manual. |
78e99b4a2 x86/intel_rdt: Ad... |
462 463 |
Say N if unsure. |
8425091ff x86: improve the ... |
464 |
if X86_32 |
a0d0bb4de x86/Kconfig: Simp... |
465 466 467 |
config X86_BIGSMP bool "Support for big SMP systems with more than 8 CPUs" depends on SMP |
a7f7f6248 treewide: replace... |
468 |
help |
e133f6eac x86/Kconfig: Corr... |
469 |
This option is needed for the systems that have more than 8 CPUs. |
a0d0bb4de x86/Kconfig: Simp... |
470 |
|
c5c606d9d x86: cleanup, ren... |
471 472 473 |
config X86_EXTENDED_PLATFORM bool "Support for extended (non-PC) x86 platforms" default y |
a7f7f6248 treewide: replace... |
474 |
help |
06ac8346a x86: cleanup, int... |
475 476 477 |
If you disable this option then the kernel will only support standard PC platforms. (which covers the vast majority of systems out there.) |
8425091ff x86: improve the ... |
478 479 |
If you enable this option then you'll be able to select support for the following (non-PC) 32 bit x86 platforms: |
cb7b80237 x86/platform: Mak... |
480 |
Goldfish (Android emulator) |
8425091ff x86: improve the ... |
481 |
AMD Elan |
8425091ff x86: improve the ... |
482 483 |
RDC R-321x SoC SGI 320/540 (Visual Workstation) |
83125a3a1 x86, platform: In... |
484 |
STA2X11-based (e.g. Northville) |
3f4110a48 x86: Add Mooresto... |
485 |
Moorestown MID devices |
06ac8346a x86: cleanup, int... |
486 487 488 |
If you have one of these systems, or if you want to build a generic distribution kernel, say Y here - otherwise say N. |
8425091ff x86: improve the ... |
489 |
endif |
06ac8346a x86: cleanup, int... |
490 |
|
8425091ff x86: improve the ... |
491 492 493 494 |
if X86_64 config X86_EXTENDED_PLATFORM bool "Support for extended (non-PC) x86 platforms" default y |
a7f7f6248 treewide: replace... |
495 |
help |
8425091ff x86: improve the ... |
496 497 498 499 500 501 |
If you disable this option then the kernel will only support standard PC platforms. (which covers the vast majority of systems out there.) If you enable this option then you'll be able to select support for the following (non-PC) 64 bit x86 platforms: |
44b111b51 x86: Add NumaChip... |
502 |
Numascale NumaChip |
8425091ff x86: improve the ... |
503 504 505 506 507 508 |
ScaleMP vSMP SGI Ultraviolet If you have one of these systems, or if you want to build a generic distribution kernel, say Y here - otherwise say N. endif |
c5c606d9d x86: cleanup, ren... |
509 510 |
# This is an alphabetically sorted list of 64 bit extended platforms # Please maintain the alphabetic order if and when there are additions |
44b111b51 x86: Add NumaChip... |
511 512 513 514 515 516 517 |
config X86_NUMACHIP bool "Numascale NumaChip" depends on X86_64 depends on X86_EXTENDED_PLATFORM depends on NUMA depends on SMP depends on X86_X2APIC |
f9726bfd4 x86/PCI: Add Numa... |
518 |
depends on PCI_MMCONFIG |
a7f7f6248 treewide: replace... |
519 |
help |
44b111b51 x86: Add NumaChip... |
520 521 522 |
Adds support for Numascale NumaChip large-SMP systems. Needed to enable more than ~168 cores. If you don't have one of these, you should say N here. |
506f1d07b x86: move the res... |
523 |
|
c5c606d9d x86: cleanup, ren... |
524 525 |
config X86_VSMP bool "ScaleMP vSMP" |
6276a074c x86: Make Linux g... |
526 |
select HYPERVISOR_GUEST |
c5c606d9d x86: cleanup, ren... |
527 528 529 |
select PARAVIRT depends on X86_64 && PCI depends on X86_EXTENDED_PLATFORM |
ead91d4b8 x86/vsmp: Fix num... |
530 |
depends on SMP |
a7f7f6248 treewide: replace... |
531 |
help |
c5c606d9d x86: cleanup, ren... |
532 533 534 |
Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is supposed to run on these EM64T-based machines. Only choose this option if you have one of these machines. |
5e3a77e9a x86: add support ... |
535 |
|
03b486322 x86: make UV supp... |
536 537 538 |
config X86_UV bool "SGI Ultraviolet" depends on X86_64 |
c5c606d9d x86: cleanup, ren... |
539 |
depends on X86_EXTENDED_PLATFORM |
54c28d294 x86, uv: add Kcon... |
540 |
depends on NUMA |
1ecb4ae5f arch/x86/Kconfig:... |
541 |
depends on EFI |
9d6c26e73 x86: x2apic, IR: ... |
542 |
depends on X86_X2APIC |
1222e564c x86/platform/uv: ... |
543 |
depends on PCI |
a7f7f6248 treewide: replace... |
544 |
help |
03b486322 x86: make UV supp... |
545 546 |
This option is needed in order to support SGI Ultraviolet systems. If you don't have one of these, you should say N here. |
c5c606d9d x86: cleanup, ren... |
547 548 |
# Following is an alphabetically sorted list of 32 bit extended platforms # Please maintain the alphabetic order if and when there are additions |
506f1d07b x86: move the res... |
549 |
|
ddd70cf93 goldfish: platfor... |
550 |
config X86_GOLDFISH |
b03b016fe x86/Kconfig: Fix ... |
551 552 |
bool "Goldfish (Virtual Platform)" depends on X86_EXTENDED_PLATFORM |
a7f7f6248 treewide: replace... |
553 |
help |
ddd70cf93 goldfish: platfor... |
554 555 556 |
Enable support for the Goldfish virtual platform used primarily for Android development. Unless you are building for the Android Goldfish emulator say N here. |
c751e17b5 x86: Add CE4100 p... |
557 558 559 560 |
config X86_INTEL_CE bool "CE4100 TV platform" depends on PCI depends on PCI_GODIRECT |
6084a6e23 x86: ce4100, irq:... |
561 |
depends on X86_IO_APIC |
c751e17b5 x86: Add CE4100 p... |
562 563 |
depends on X86_32 depends on X86_EXTENDED_PLATFORM |
37bc9f507 x86: Ce4100: Add ... |
564 |
select X86_REBOOTFIXUPS |
da6b737b9 x86: Add device t... |
565 566 |
select OF select OF_EARLY_FLATTREE |
a7f7f6248 treewide: replace... |
567 |
help |
c751e17b5 x86: Add CE4100 p... |
568 569 570 |
Select for the Intel CE media processor (CE4100) SOC. This option compiles in support for the CE4100 SOC for settop boxes and media devices. |
4cb9b00f4 x86, intel-mid: R... |
571 |
config X86_INTEL_MID |
43605ef18 x86, config: Intr... |
572 |
bool "Intel MID platform support" |
43605ef18 x86, config: Intr... |
573 |
depends on X86_EXTENDED_PLATFORM |
edc6bc784 x86/intel/mid: Fi... |
574 |
depends on X86_PLATFORM_DEVICES |
1ea7c6737 x86/config: Revam... |
575 |
depends on PCI |
3fda5bb42 x86/platform/inte... |
576 |
depends on X86_64 || (PCI_GOANY && X86_32) |
1ea7c6737 x86/config: Revam... |
577 |
depends on X86_IO_APIC |
7c9c3a1e5 x86/intel config:... |
578 |
select SFI |
4cb9b00f4 x86, intel-mid: R... |
579 |
select I2C |
7c9c3a1e5 x86/intel config:... |
580 |
select DW_APB_TIMER |
1ea7c6737 x86/config: Revam... |
581 |
select APB_TIMER |
54b34aa0a platform/x86: int... |
582 |
select INTEL_SCU_PCI |
15a713df4 x86/config: Selec... |
583 |
select MFD_INTEL_MSIC |
a7f7f6248 treewide: replace... |
584 |
help |
4cb9b00f4 x86, intel-mid: R... |
585 586 587 |
Select to build a kernel capable of supporting Intel MID (Mobile Internet Device) platform systems which do not have the PCI legacy interfaces. If you are building for a PC class system say N here. |
1ea7c6737 x86/config: Revam... |
588 |
|
4cb9b00f4 x86, intel-mid: R... |
589 590 |
Intel MID platforms are based on an Intel processor and chipset which consume less power than most of the x86 derivatives. |
43605ef18 x86, config: Intr... |
591 |
|
8bbc2a135 x86/intel/quark: ... |
592 593 594 595 596 597 598 599 600 601 602 |
config X86_INTEL_QUARK bool "Intel Quark platform support" depends on X86_32 depends on X86_EXTENDED_PLATFORM depends on X86_PLATFORM_DEVICES depends on X86_TSC depends on PCI depends on PCI_GOANY depends on X86_IO_APIC select IOSF_MBI select INTEL_IMR |
9ab6eb51e x86/intel/quark: ... |
603 |
select COMMON_CLK |
a7f7f6248 treewide: replace... |
604 |
help |
8bbc2a135 x86/intel/quark: ... |
605 606 607 |
Select to include support for Quark X1000 SoC. Say Y here if you have a Quark based system such as the Arduino compatible Intel Galileo. |
3d48aab1d x86: add support ... |
608 609 |
config X86_INTEL_LPSS bool "Intel Low Power Subsystem Support" |
5962dd22f x86/intel/lpss: M... |
610 |
depends on X86 && ACPI && PCI |
3d48aab1d x86: add support ... |
611 |
select COMMON_CLK |
0f531431d x86/intel/lpss: A... |
612 |
select PINCTRL |
eebb3e8d8 ACPI / LPSS: over... |
613 |
select IOSF_MBI |
a7f7f6248 treewide: replace... |
614 |
help |
3d48aab1d x86: add support ... |
615 616 |
Select to build support for Intel Low Power Subsystem such as found on Intel Lynxpoint PCH. Selecting this option enables |
0f531431d x86/intel/lpss: A... |
617 618 |
things like clock tree (common clock framework) and pincontrol which are needed by the LPSS peripheral drivers. |
3d48aab1d x86: add support ... |
619 |
|
92082a888 ACPI: add AMD ACP... |
620 621 622 623 624 |
config X86_AMD_PLATFORM_DEVICE bool "AMD ACPI2Platform devices support" depends on ACPI select COMMON_CLK select PINCTRL |
a7f7f6248 treewide: replace... |
625 |
help |
92082a888 ACPI: add AMD ACP... |
626 627 628 629 |
Select to interpret AMD specific ACPI device to platform device such as I2C, UART, GPIO found on AMD Carrizo and later chipsets. I2C and UART depend on COMMON_CLK to set clock. GPIO driver is implemented under PINCTRL subsystem. |
ced3ce760 x86/platform/inte... |
630 631 632 |
config IOSF_MBI tristate "Intel SoC IOSF Sideband support for SoC platforms" depends on PCI |
a7f7f6248 treewide: replace... |
633 |
help |
ced3ce760 x86/platform/inte... |
634 635 636 637 638 639 640 641 642 643 644 645 |
This option enables sideband register access support for Intel SoC platforms. On these platforms the IOSF sideband is used in lieu of MSR's for some register accesses, mostly but not limited to thermal and power. Drivers may query the availability of this device to determine if they need the sideband in order to work on these platforms. The sideband is available on the following SoC products. This list is not meant to be exclusive. - BayTrail - Braswell - Quark You should say Y if you are running a kernel on one of these SoC's. |
ed2226bd4 x86/platform/inte... |
646 647 648 |
config IOSF_MBI_DEBUG bool "Enable IOSF sideband access through debugfs" depends on IOSF_MBI && DEBUG_FS |
a7f7f6248 treewide: replace... |
649 |
help |
ed2226bd4 x86/platform/inte... |
650 651 652 653 654 655 656 657 |
Select this option to expose the IOSF sideband access registers (MCR, MDR, MCRX) through debugfs to write and read register information from different units on the SoC. This is most useful for obtaining device state information for debug and analysis. As this is a general access mechanism, users of this option would have specific knowledge of the device they want to access. If you don't require the option or are in doubt, say N. |
c5c606d9d x86: cleanup, ren... |
658 659 |
config X86_RDC321X bool "RDC R-321x SoC" |
506f1d07b x86: move the res... |
660 |
depends on X86_32 |
c5c606d9d x86: cleanup, ren... |
661 662 663 |
depends on X86_EXTENDED_PLATFORM select M486 select X86_REBOOTFIXUPS |
a7f7f6248 treewide: replace... |
664 |
help |
c5c606d9d x86: cleanup, ren... |
665 666 667 |
This option is needed for RDC R-321x system-on-chip, also known as R-8610-(G). If you don't have one of these chips, you should say N here. |
e0c7ae376 x86: rename X86_G... |
668 |
config X86_32_NON_STANDARD |
9c3980176 x86: move non-sta... |
669 670 |
bool "Support non-standard 32-bit SMP architectures" depends on X86_32 && SMP |
c5c606d9d x86: cleanup, ren... |
671 |
depends on X86_EXTENDED_PLATFORM |
a7f7f6248 treewide: replace... |
672 |
help |
b5660ba76 x86, platforms: R... |
673 674 675 676 |
This option compiles in the bigsmp and STA2X11 default subarchitectures. It is intended for a generic binary kernel. If you select them all, kernel will probe it one by one and will fallback to default. |
d49c42884 x86: make generic... |
677 |
|
c5c606d9d x86: cleanup, ren... |
678 |
# Alphabetically sorted list of Non standard 32 bit platforms |
d49c42884 x86: make generic... |
679 |
|
d949f36f1 x86: Fix hwpoison... |
680 |
config X86_SUPPORTS_MEMORY_FAILURE |
6fc108a08 x86: Clean up arc... |
681 |
def_bool y |
d949f36f1 x86: Fix hwpoison... |
682 683 684 |
# MCE code calls memory_failure(): depends on X86_MCE # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags: |
d949f36f1 x86: Fix hwpoison... |
685 686 687 |
# On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH: depends on X86_64 || !SPARSEMEM select ARCH_SUPPORTS_MEMORY_FAILURE |
d949f36f1 x86: Fix hwpoison... |
688 |
|
83125a3a1 x86, platform: In... |
689 690 691 |
config STA2X11 bool "STA2X11 Companion Chip Support" depends on X86_32_NON_STANDARD && PCI |
83125a3a1 x86, platform: In... |
692 693 |
select SWIOTLB select MFD_STA2X11 |
0145071b3 x86: Do away with... |
694 |
select GPIOLIB |
a7f7f6248 treewide: replace... |
695 |
help |
83125a3a1 x86, platform: In... |
696 697 698 699 700 |
This adds support for boards based on the STA2X11 IO-Hub, a.k.a. "ConneXt". The chip is used in place of the standard PC chipset, so all "standard" peripherals are missing. If this option is selected the kernel will still be able to boot on standard PC machines. |
82148d1d0 x86/platform: Add... |
701 702 703 |
config X86_32_IRIS tristate "Eurobraille/Iris poweroff module" depends on X86_32 |
a7f7f6248 treewide: replace... |
704 |
help |
82148d1d0 x86/platform: Add... |
705 706 707 708 709 710 711 712 |
The Iris machines from EuroBraille do not have APM or ACPI support to shut themselves down properly. A special I/O sequence is needed to do so, which is what this module does at kernel shutdown. This is only for Iris machines from EuroBraille. If unused, say N. |
ae1e9130b sched: rename SCH... |
713 |
config SCHED_OMIT_FRAME_POINTER |
3c2362e62 x86: use def_bool... |
714 715 |
def_bool y prompt "Single-depth WCHAN output" |
a87d09143 x86, sched: enabl... |
716 |
depends on X86 |
a7f7f6248 treewide: replace... |
717 |
help |
506f1d07b x86: move the res... |
718 719 720 721 722 723 |
Calculate simpler /proc/<PID>/wchan values. If this option is disabled then wchan values will recurse back to the caller function. This provides more accurate wchan values, at the expense of slightly more scheduling overhead. If in doubt, say "Y". |
6276a074c x86: Make Linux g... |
724 725 |
menuconfig HYPERVISOR_GUEST bool "Linux guest support" |
a7f7f6248 treewide: replace... |
726 |
help |
6276a074c x86: Make Linux g... |
727 728 729 |
Say Y here to enable options for running Linux under various hyper- visors. This option enables basic hypervisor detection and platform setup. |
506f1d07b x86: move the res... |
730 |
|
6276a074c x86: Make Linux g... |
731 732 |
If you say N, all options in this submenu will be skipped and disabled, and Linux guest support won't be built in. |
506f1d07b x86: move the res... |
733 |
|
6276a074c x86: Make Linux g... |
734 |
if HYPERVISOR_GUEST |
506f1d07b x86: move the res... |
735 |
|
e61bd94a3 x86: allow enabli... |
736 737 |
config PARAVIRT bool "Enable paravirtualization code" |
a7f7f6248 treewide: replace... |
738 |
help |
e61bd94a3 x86: allow enabli... |
739 740 741 742 |
This changes the kernel so it can modify itself when it is run under a hypervisor, potentially improving performance significantly over full virtualization. However, when run without a hypervisor the kernel is theoretically slower and slightly larger. |
c00a280a8 x86/paravirt: Int... |
743 744 |
config PARAVIRT_XXL bool |
6276a074c x86: Make Linux g... |
745 746 747 |
config PARAVIRT_DEBUG bool "paravirt-ops debugging" depends on PARAVIRT && DEBUG_KERNEL |
a7f7f6248 treewide: replace... |
748 |
help |
6276a074c x86: Make Linux g... |
749 750 |
Enable to debug paravirt_ops internals. Specifically, BUG if a paravirt_op is missing when it is called. |
b4ecc1269 x86: Fix performa... |
751 752 |
config PARAVIRT_SPINLOCKS bool "Paravirtualization layer for spinlocks" |
6ea303864 arch/x86: remove ... |
753 |
depends on PARAVIRT && SMP |
a7f7f6248 treewide: replace... |
754 |
help |
b4ecc1269 x86: Fix performa... |
755 756 757 |
Paravirtualized spinlocks allow a pvops backend to replace the spinlock implementation with something virtualization-friendly (for example, block the virtual CPU rather than spinning). |
4c4e4f613 x86/locking/kconf... |
758 759 |
It has a minimal impact on native kernels and gives a nice performance benefit on paravirtualized KVM / Xen kernels. |
b4ecc1269 x86: Fix performa... |
760 |
|
4c4e4f613 x86/locking/kconf... |
761 |
If you are unsure how to answer this question, answer Y. |
b4ecc1269 x86: Fix performa... |
762 |
|
ecca25029 x86/Kconfig: Add ... |
763 764 |
config X86_HV_CALLBACK_VECTOR def_bool n |
6276a074c x86: Make Linux g... |
765 |
source "arch/x86/xen/Kconfig" |
7af192c95 x86: Add structs ... |
766 |
|
6276a074c x86: Make Linux g... |
767 768 769 770 |
config KVM_GUEST bool "KVM Guest support (including kvmclock)" depends on PARAVIRT select PARAVIRT_CLOCK |
a1c4423b0 cpuidle-haltpoll:... |
771 |
select ARCH_CPUIDLE_HALTPOLL |
b1d405751 KVM: x86: Switch ... |
772 |
select X86_HV_CALLBACK_VECTOR |
6276a074c x86: Make Linux g... |
773 |
default y |
a7f7f6248 treewide: replace... |
774 |
help |
6276a074c x86: Make Linux g... |
775 776 777 778 779 |
This option enables various optimizations for running under the KVM hypervisor. It includes a paravirtualized clock, so that instead of relying on a PIT (or probably other) emulation by the underlying device model, the host provides the guest with timing infrastructure such as time of day, and system time |
506f1d07b x86: move the res... |
780 |
|
a1c4423b0 cpuidle-haltpoll:... |
781 |
config ARCH_CPUIDLE_HALTPOLL |
b03b016fe x86/Kconfig: Fix ... |
782 783 784 |
def_bool n prompt "Disable host haltpoll when loading haltpoll driver" help |
a1c4423b0 cpuidle-haltpoll:... |
785 |
If virtualized under KVM, disable host haltpoll. |
7733607fb xen/pvh: Split CO... |
786 787 |
config PVH bool "Support for running PVH guests" |
a7f7f6248 treewide: replace... |
788 |
help |
7733607fb xen/pvh: Split CO... |
789 790 |
This option enables the PVH entry point for guest virtual machines as specified in the x86/HVM direct boot ABI. |
6276a074c x86: Make Linux g... |
791 792 793 |
config PARAVIRT_TIME_ACCOUNTING bool "Paravirtual steal time accounting" depends on PARAVIRT |
a7f7f6248 treewide: replace... |
794 |
help |
6276a074c x86: Make Linux g... |
795 796 797 798 799 800 801 802 803 |
Select this option to enable fine granularity task steal time accounting. Time spent executing other tasks in parallel with the current vCPU is discounted from the vCPU power. To account for that, there can be a small performance impact. If in doubt, say N here. config PARAVIRT_CLOCK bool |
97349135f x86/paravirt: add... |
804 |
|
4a362601b x86/jailhouse: Ad... |
805 806 |
config JAILHOUSE_GUEST bool "Jailhouse non-root cell support" |
abde587b6 x86/jailhouse: Ad... |
807 |
depends on X86_64 && PCI |
87e65d05b x86/jailhouse: En... |
808 |
select X86_PM_TIMER |
a7f7f6248 treewide: replace... |
809 |
help |
4a362601b x86/jailhouse: Ad... |
810 811 812 |
This option allows to run Linux as guest in a Jailhouse non-root cell. You can leave this option disabled if you only want to start Jailhouse and run Linux afterwards in the root cell. |
ec7972c99 x86: Add support ... |
813 814 815 |
config ACRN_GUEST bool "ACRN Guest support" depends on X86_64 |
498ad3936 x86/acrn: Use HYP... |
816 |
select X86_HV_CALLBACK_VECTOR |
ec7972c99 x86: Add support ... |
817 818 819 820 821 822 |
help This option allows to run Linux as guest in the ACRN hypervisor. ACRN is a flexible, lightweight reference open-source hypervisor, built with real-time and safety-criticality in mind. It is built for embedded IOT with small footprint and real-time features. More details can be found in https://projectacrn.org/. |
6276a074c x86: Make Linux g... |
823 |
endif #HYPERVISOR_GUEST |
97349135f x86/paravirt: add... |
824 |
|
506f1d07b x86: move the res... |
825 826 827 |
source "arch/x86/Kconfig.cpu" config HPET_TIMER |
3c2362e62 x86: use def_bool... |
828 |
def_bool X86_64 |
506f1d07b x86: move the res... |
829 |
prompt "HPET Timer Support" if X86_32 |
a7f7f6248 treewide: replace... |
830 |
help |
8f9ca475c x86: clean up arc... |
831 832 833 834 835 836 |
Use the IA-PC HPET (High Precision Event Timer) to manage time in preference to the PIT and RTC, if a HPET is present. HPET is the next generation timer replacing legacy 8254s. The HPET provides a stable time base on SMP systems, unlike the TSC, but it is more expensive to access, |
4e7f9df25 hpet: Drop stale ... |
837 838 |
as it is off-chip. The interface used is documented in the HPET spec, revision 1. |
506f1d07b x86: move the res... |
839 |
|
8f9ca475c x86: clean up arc... |
840 841 842 |
You can safely choose Y here. However, HPET will only be activated if the platform and the BIOS support this feature. Otherwise the 8254 will be used for timing services. |
506f1d07b x86: move the res... |
843 |
|
8f9ca475c x86: clean up arc... |
844 |
Choose N to continue using the legacy 8254 timer. |
506f1d07b x86: move the res... |
845 846 |
config HPET_EMULATE_RTC |
3c2362e62 x86: use def_bool... |
847 |
def_bool y |
9d8af78b0 rtc: add HPET RTC... |
848 |
depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) |
506f1d07b x86: move the res... |
849 |
|
bb24c4716 x86, apbt: Moores... |
850 |
config APB_TIMER |
b03b016fe x86/Kconfig: Fix ... |
851 852 853 854 855 856 857 858 859 860 |
def_bool y if X86_INTEL_MID prompt "Intel MID APB Timer Support" if X86_INTEL_MID select DW_APB_TIMER depends on X86_INTEL_MID && SFI help APB timer is the replacement for 8254, HPET on X86 MID platforms. The APBT provides a stable time base on SMP systems, unlike the TSC, but it is more expensive to access, as it is off-chip. APB timers are always running regardless of CPU C states, they are used as per CPU clockevent device when possible. |
bb24c4716 x86, apbt: Moores... |
861 |
|
6a108a14f kconfig: rename C... |
862 |
# Mark as expert because too many people got it wrong. |
506f1d07b x86: move the res... |
863 |
# The code disables itself when not needed. |
7ae9392c0 x86: configurable... |
864 865 |
config DMI default y |
cf0744021 firmware/dmi_scan... |
866 |
select DMI_SCAN_MACHINE_NON_EFI_FALLBACK |
6a108a14f kconfig: rename C... |
867 |
bool "Enable DMI scanning" if EXPERT |
a7f7f6248 treewide: replace... |
868 |
help |
7ae9392c0 x86: configurable... |
869 870 871 872 |
Enabled scanning of DMI to identify machine quirks. Say Y here unless you have verified that your setup is not affected by entries in the DMI blacklist. Required by PNP BIOS code. |
506f1d07b x86: move the res... |
873 |
config GART_IOMMU |
38901f1c1 x86/iommu: Don't ... |
874 |
bool "Old AMD GART IOMMU support" |
2f9237d4f dma-mapping: make... |
875 |
select DMA_OPS |
a4ce5a48d iommu-helper: mov... |
876 |
select IOMMU_HELPER |
506f1d07b x86: move the res... |
877 |
select SWIOTLB |
23ac4ae82 x86, k8: Rename k... |
878 |
depends on X86_64 && PCI && AMD_NB |
a7f7f6248 treewide: replace... |
879 |
help |
ced3c42c9 x86/iommu: Clean ... |
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 |
Provides a driver for older AMD Athlon64/Opteron/Turion/Sempron GART based hardware IOMMUs. The GART supports full DMA access for devices with 32-bit access limitations, on systems with more than 3 GB. This is usually needed for USB, sound, many IDE/SATA chipsets and some other devices. Newer systems typically have a modern AMD IOMMU, supported via the CONFIG_AMD_IOMMU=y config option. In normal configurations this driver is only active when needed: there's more than 3 GB of memory and the system contains a 32-bit limited device. If unsure, say Y. |
506f1d07b x86: move the res... |
895 |
|
1184dc2ff x86: modify Kconf... |
896 |
config MAXSMP |
ddb0c5a68 Replace Configure... |
897 |
bool "Enable Maximum number of SMP Processors and NUMA Nodes" |
6ea303864 arch/x86: remove ... |
898 |
depends on X86_64 && SMP && DEBUG_KERNEL |
36f5101a6 x86: enable MAXSMP |
899 |
select CPUMASK_OFFSTACK |
a7f7f6248 treewide: replace... |
900 |
help |
ddb0c5a68 Replace Configure... |
901 |
Enable maximum number of CPUS and NUMA Nodes for this architecture. |
1184dc2ff x86: modify Kconf... |
902 |
If unsure, say N. |
506f1d07b x86: move the res... |
903 |
|
aec6487e9 x86/Kconfig: Furt... |
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
# # The maximum number of CPUs supported: # # The main config value is NR_CPUS, which defaults to NR_CPUS_DEFAULT, # and which can be configured interactively in the # [NR_CPUS_RANGE_BEGIN ... NR_CPUS_RANGE_END] range. # # The ranges are different on 32-bit and 64-bit kernels, depending on # hardware capabilities and scalability features of the kernel. # # ( If MAXSMP is enabled we just use the highest possible value and disable # interactive configuration. ) # config NR_CPUS_RANGE_BEGIN |
a0d0bb4de x86/Kconfig: Simp... |
919 |
int |
aec6487e9 x86/Kconfig: Furt... |
920 921 922 |
default NR_CPUS_RANGE_END if MAXSMP default 1 if !SMP default 2 |
a0d0bb4de x86/Kconfig: Simp... |
923 |
|
aec6487e9 x86/Kconfig: Furt... |
924 |
config NR_CPUS_RANGE_END |
a0d0bb4de x86/Kconfig: Simp... |
925 |
int |
aec6487e9 x86/Kconfig: Furt... |
926 927 928 929 |
depends on X86_32 default 64 if SMP && X86_BIGSMP default 8 if SMP && !X86_BIGSMP default 1 if !SMP |
a0d0bb4de x86/Kconfig: Simp... |
930 |
|
aec6487e9 x86/Kconfig: Furt... |
931 |
config NR_CPUS_RANGE_END |
a0d0bb4de x86/Kconfig: Simp... |
932 |
int |
aec6487e9 x86/Kconfig: Furt... |
933 |
depends on X86_64 |
1edae1ae6 x86/Kconfig: Enfo... |
934 935 |
default 8192 if SMP && CPUMASK_OFFSTACK default 512 if SMP && !CPUMASK_OFFSTACK |
aec6487e9 x86/Kconfig: Furt... |
936 |
default 1 if !SMP |
a0d0bb4de x86/Kconfig: Simp... |
937 |
|
aec6487e9 x86/Kconfig: Furt... |
938 |
config NR_CPUS_DEFAULT |
a0d0bb4de x86/Kconfig: Simp... |
939 940 |
int depends on X86_32 |
aec6487e9 x86/Kconfig: Furt... |
941 942 943 |
default 32 if X86_BIGSMP default 8 if SMP default 1 if !SMP |
a0d0bb4de x86/Kconfig: Simp... |
944 |
|
aec6487e9 x86/Kconfig: Furt... |
945 |
config NR_CPUS_DEFAULT |
a0d0bb4de x86/Kconfig: Simp... |
946 947 |
int depends on X86_64 |
aec6487e9 x86/Kconfig: Furt... |
948 949 950 |
default 8192 if MAXSMP default 64 if SMP default 1 if !SMP |
a0d0bb4de x86/Kconfig: Simp... |
951 |
|
506f1d07b x86: move the res... |
952 |
config NR_CPUS |
36f5101a6 x86: enable MAXSMP |
953 |
int "Maximum number of CPUs" if SMP && !MAXSMP |
aec6487e9 x86/Kconfig: Furt... |
954 955 |
range NR_CPUS_RANGE_BEGIN NR_CPUS_RANGE_END default NR_CPUS_DEFAULT |
a7f7f6248 treewide: replace... |
956 |
help |
506f1d07b x86: move the res... |
957 |
This allows you to specify the maximum number of CPUs which this |
bb61ccc7d x86/cpu: Allow hi... |
958 |
kernel will support. If CPUMASK_OFFSTACK is enabled, the maximum |
cad14bb9f x86/kconfig: Fix ... |
959 |
supported value is 8192, otherwise the maximum value is 512. The |
506f1d07b x86: move the res... |
960 |
minimum value which makes sense is 2. |
aec6487e9 x86/Kconfig: Furt... |
961 962 |
This is purely to save memory: each supported CPU adds about 8KB to the kernel image. |
506f1d07b x86: move the res... |
963 964 |
config SCHED_SMT |
dbe733642 x86/Kconfig: Sele... |
965 |
def_bool y if SMP |
506f1d07b x86: move the res... |
966 967 |
config SCHED_MC |
3c2362e62 x86: use def_bool... |
968 969 |
def_bool y prompt "Multi-core scheduler support" |
c8e56d20f x86: Kill CONFIG_... |
970 |
depends on SMP |
a7f7f6248 treewide: replace... |
971 |
help |
506f1d07b x86: move the res... |
972 973 974 |
Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. |
de966cf4a sched/x86: Change... |
975 976 |
config SCHED_MC_PRIO bool "CPU core priorities scheduler support" |
0a21fc121 sched/x86: Make C... |
977 978 979 |
depends on SCHED_MC && CPU_SUP_INTEL select X86_INTEL_PSTATE select CPU_FREQ |
de966cf4a sched/x86: Change... |
980 |
default y |
a7f7f6248 treewide: replace... |
981 |
help |
0a21fc121 sched/x86: Make C... |
982 983 984 985 |
Intel Turbo Boost Max Technology 3.0 enabled CPUs have a core ordering determined at manufacturing time, which allows certain cores to reach higher turbo frequencies (when running single threaded workloads) than others. |
de966cf4a sched/x86: Change... |
986 |
|
0a21fc121 sched/x86: Make C... |
987 988 989 990 |
Enabling this kernel feature teaches the scheduler about the TBM3 (aka ITMT) priority order of the CPU cores and adjusts the scheduler's CPU selection logic accordingly, so that higher overall system performance can be achieved. |
de966cf4a sched/x86: Change... |
991 |
|
0a21fc121 sched/x86: Make C... |
992 |
This feature will have no effect on CPUs without this feature. |
de966cf4a sched/x86: Change... |
993 |
|
0a21fc121 sched/x86: Make C... |
994 |
If unsure say Y here. |
5e76b2ab3 x86: Enable Intel... |
995 |
|
30b8b0066 init: Get rid of ... |
996 |
config UP_LATE_INIT |
b03b016fe x86/Kconfig: Fix ... |
997 998 |
def_bool y depends on !SMP && X86_LOCAL_APIC |
30b8b0066 init: Get rid of ... |
999 |
|
506f1d07b x86: move the res... |
1000 |
config X86_UP_APIC |
50849eefe x86/Kconfig: Simp... |
1001 1002 |
bool "Local APIC support on uniprocessors" if !PCI_MSI default PCI_MSI |
38a1dfda8 x86/apic: Re-enab... |
1003 |
depends on X86_32 && !SMP && !X86_32_NON_STANDARD |
a7f7f6248 treewide: replace... |
1004 |
help |
506f1d07b x86: move the res... |
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 |
A local APIC (Advanced Programmable Interrupt Controller) is an integrated interrupt controller in the CPU. If you have a single-CPU system which has a processor with a local APIC, you can say Y here to enable and use it. If you say Y here even though your machine doesn't have a local APIC, then the kernel will still run with no slowdown at all. The local APIC supports CPU-generated self-interrupts (timer, performance counters), and the NMI watchdog which detects hard lockups. config X86_UP_IOAPIC bool "IO-APIC support on uniprocessors" depends on X86_UP_APIC |
a7f7f6248 treewide: replace... |
1017 |
help |
506f1d07b x86: move the res... |
1018 1019 1020 1021 1022 1023 1024 1025 1026 |
An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an SMP-capable replacement for PC-style interrupt controllers. Most SMP systems and many recent uniprocessor systems have one. If you have a single-CPU system with an IO-APIC, you can say Y here to use it. If you say Y here even though your machine doesn't have an IO-APIC, then the kernel will still run with no slowdown at all. config X86_LOCAL_APIC |
3c2362e62 x86: use def_bool... |
1027 |
def_bool y |
0dbc6078c x86, build, pci: ... |
1028 |
depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI |
b5dc8e6c2 x86/irq: Use hier... |
1029 |
select IRQ_DOMAIN_HIERARCHY |
52f518a3a x86/MSI: Use hier... |
1030 |
select PCI_MSI_IRQ_DOMAIN if PCI_MSI |
506f1d07b x86: move the res... |
1031 1032 |
config X86_IO_APIC |
b1da1e715 x86/Kconfig: Simp... |
1033 1034 |
def_bool y depends on X86_LOCAL_APIC || X86_UP_IOAPIC |
506f1d07b x86: move the res... |
1035 |
|
41b9eb264 x86, pci: introdu... |
1036 1037 |
config X86_REROUTE_FOR_BROKEN_BOOT_IRQS bool "Reroute for broken boot IRQs" |
41b9eb264 x86, pci: introdu... |
1038 |
depends on X86_IO_APIC |
a7f7f6248 treewide: replace... |
1039 |
help |
41b9eb264 x86, pci: introdu... |
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 |
This option enables a workaround that fixes a source of spurious interrupts. This is recommended when threaded interrupt handling is used on systems where the generation of superfluous "boot interrupts" cannot be disabled. Some chipsets generate a legacy INTx "boot IRQ" when the IRQ entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does during interrupt handling). On chipsets where this boot IRQ generation cannot be disabled, this workaround keeps the original IRQ line masked so that only the equivalent "boot IRQ" is delivered to the CPUs. The workaround also tells the kernel to set up the IRQ handler on the boot IRQ line. In this way only one interrupt is delivered to the kernel. Otherwise the spurious second interrupt may cause the kernel to bring down (vital) interrupt lines. Only affects "broken" chipsets. Interrupt sharing may be increased on these systems. |
506f1d07b x86: move the res... |
1058 |
config X86_MCE |
bab9bc658 x86: mce: Update ... |
1059 |
bool "Machine Check / overheating reporting" |
648ed9403 x86/mce: Provide ... |
1060 |
select GENERIC_ALLOCATOR |
e57dbaf77 x86, mce: Enable ... |
1061 |
default y |
a7f7f6248 treewide: replace... |
1062 |
help |
bab9bc658 x86: mce: Update ... |
1063 1064 |
Machine Check support allows the processor to notify the kernel if it detects a problem (e.g. overheating, data corruption). |
506f1d07b x86: move the res... |
1065 |
The action the kernel takes depends on the severity of the problem, |
bab9bc658 x86: mce: Update ... |
1066 |
ranging from warning messages to halting the machine. |
4efc0670b x86, mce: use 64b... |
1067 |
|
5de97c9f6 x86/mce: Factor o... |
1068 1069 1070 |
config X86_MCELOG_LEGACY bool "Support for deprecated /dev/mcelog character device" depends on X86_MCE |
a7f7f6248 treewide: replace... |
1071 |
help |
5de97c9f6 x86/mce: Factor o... |
1072 1073 1074 |
Enable support for /dev/mcelog which is needed by the old mcelog userspace logging daemon. Consider switching to the new generation rasdaemon solution. |
506f1d07b x86: move the res... |
1075 |
config X86_MCE_INTEL |
3c2362e62 x86: use def_bool... |
1076 1077 |
def_bool y prompt "Intel MCE features" |
c1ebf8356 x86: mce: Rename ... |
1078 |
depends on X86_MCE && X86_LOCAL_APIC |
a7f7f6248 treewide: replace... |
1079 |
help |
506f1d07b x86: move the res... |
1080 1081 1082 1083 |
Additional support for intel specific MCE features such as the thermal monitor. config X86_MCE_AMD |
3c2362e62 x86: use def_bool... |
1084 1085 |
def_bool y prompt "AMD MCE features" |
f5382de9d x86/mce/AMD: Add ... |
1086 |
depends on X86_MCE && X86_LOCAL_APIC && AMD_NB |
a7f7f6248 treewide: replace... |
1087 |
help |
506f1d07b x86: move the res... |
1088 1089 |
Additional support for AMD specific MCE features such as the DRAM Error Threshold. |
4efc0670b x86, mce: use 64b... |
1090 |
config X86_ANCIENT_MCE |
6fc108a08 x86: Clean up arc... |
1091 |
bool "Support for old Pentium 5 / WinChip machine checks" |
c31d96338 x86: mce: Make CO... |
1092 |
depends on X86_32 && X86_MCE |
a7f7f6248 treewide: replace... |
1093 |
help |
cd13adcc8 x86: trivial clea... |
1094 |
Include support for machine check handling on old Pentium 5 or WinChip |
5065a706c treewide: Fix typ... |
1095 |
systems. These typically need to be enabled explicitly on the command |
cd13adcc8 x86: trivial clea... |
1096 |
line. |
4efc0670b x86, mce: use 64b... |
1097 |
|
b27626863 x86, mce, cmci: f... |
1098 1099 |
config X86_MCE_THRESHOLD depends on X86_MCE_AMD || X86_MCE_INTEL |
6fc108a08 x86: Clean up arc... |
1100 |
def_bool y |
b27626863 x86, mce, cmci: f... |
1101 |
|
ea149b36c x86, mce: add bas... |
1102 |
config X86_MCE_INJECT |
bc8e80d56 x86/mce: Merge mc... |
1103 |
depends on X86_MCE && X86_LOCAL_APIC && DEBUG_FS |
ea149b36c x86, mce: add bas... |
1104 |
tristate "Machine check injector support" |
a7f7f6248 treewide: replace... |
1105 |
help |
ea149b36c x86, mce: add bas... |
1106 1107 1108 |
Provide support for injecting machine checks for testing purposes. If you don't know what a machine check is and you don't do kernel QA it is safe to say n. |
4efc0670b x86, mce: use 64b... |
1109 1110 |
config X86_THERMAL_VECTOR def_bool y |
5bb38adcb x86: mce: Remove ... |
1111 |
depends on X86_MCE_INTEL |
4efc0670b x86, mce: use 64b... |
1112 |
|
07dc900e1 perf/x86: Move Kc... |
1113 |
source "arch/x86/events/Kconfig" |
e633c65a1 x86/perf/intel/un... |
1114 |
|
5aef51c34 x86/kconfig/32: R... |
1115 |
config X86_LEGACY_VM86 |
1e6428124 x86/vm86: Fix the... |
1116 |
bool "Legacy VM86 support" |
506f1d07b x86: move the res... |
1117 |
depends on X86_32 |
a7f7f6248 treewide: replace... |
1118 |
help |
5aef51c34 x86/kconfig/32: R... |
1119 1120 1121 1122 1123 1124 1125 1126 |
This option allows user programs to put the CPU into V8086 mode, which is an 80286-era approximation of 16-bit real mode. Some very old versions of X and/or vbetool require this option for user mode setting. Similarly, DOSEMU will use it if available to accelerate real mode DOS programs. However, any recent version of DOSEMU, X, or vbetool should be fully functional even without kernel VM86 support, as they will all |
1e6428124 x86/vm86: Fix the... |
1127 1128 1129 1130 |
fall back to software emulation. Nevertheless, if you are using a 16-bit DOS program where 16-bit performance matters, vm86 mode might be faster than emulation and you might want to enable this option. |
5aef51c34 x86/kconfig/32: R... |
1131 |
|
1e6428124 x86/vm86: Fix the... |
1132 1133 1134 1135 |
Note that any app that works on a 64-bit kernel is unlikely to need this option, as 64-bit kernels don't, and can't, support V8086 mode. This option is also unrelated to 16-bit protected mode and is not needed to run most 16-bit programs under Wine. |
5aef51c34 x86/kconfig/32: R... |
1136 |
|
1e6428124 x86/vm86: Fix the... |
1137 1138 |
Enabling this option increases the complexity of the kernel and slows down exception handling a tiny bit. |
5aef51c34 x86/kconfig/32: R... |
1139 |
|
1e6428124 x86/vm86: Fix the... |
1140 |
If unsure, say N here. |
5aef51c34 x86/kconfig/32: R... |
1141 1142 |
config VM86 |
b03b016fe x86/Kconfig: Fix ... |
1143 1144 |
bool default X86_LEGACY_VM86 |
34273f41d x86, espfix: Make... |
1145 1146 1147 1148 |
config X86_16BIT bool "Enable support for 16-bit segments" if EXPERT default y |
a5b9e5a2f x86/ldt: Make mod... |
1149 |
depends on MODIFY_LDT_SYSCALL |
a7f7f6248 treewide: replace... |
1150 |
help |
34273f41d x86, espfix: Make... |
1151 1152 1153 1154 1155 1156 1157 1158 |
This option is required by programs like Wine to run 16-bit protected mode legacy code on x86 processors. Disabling this option saves about 300 bytes on i386, or around 6K text plus 16K runtime memory on x86-64, config X86_ESPFIX32 def_bool y depends on X86_16BIT && X86_32 |
506f1d07b x86: move the res... |
1159 |
|
197725de6 x86, espfix: Make... |
1160 1161 |
config X86_ESPFIX64 def_bool y |
34273f41d x86, espfix: Make... |
1162 |
depends on X86_16BIT && X86_64 |
506f1d07b x86: move the res... |
1163 |
|
1ad83c858 x86_64,vsyscall: ... |
1164 |
config X86_VSYSCALL_EMULATION |
b03b016fe x86/Kconfig: Fix ... |
1165 1166 1167 |
bool "Enable vsyscall emulation" if EXPERT default y depends on X86_64 |
a7f7f6248 treewide: replace... |
1168 |
help |
1ad83c858 x86_64,vsyscall: ... |
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 |
This enables emulation of the legacy vsyscall page. Disabling it is roughly equivalent to booting with vsyscall=none, except that it will also disable the helpful warning if a program tries to use a vsyscall. With this option set to N, offending programs will just segfault, citing addresses of the form 0xffffffffff600?00. This option is required by many programs built before 2013, and care should be used even with newer programs if set to N. Disabling this option saves about 7K of kernel size and possibly 4K of additional runtime pagetable memory. |
111e7b15c x86/ioperm: Exten... |
1181 1182 |
config X86_IOPL_IOPERM bool "IOPERM and IOPL Emulation" |
a24ca9976 x86/iopl: Remove ... |
1183 |
default y |
a7f7f6248 treewide: replace... |
1184 |
help |
111e7b15c x86/ioperm: Exten... |
1185 1186 |
This enables the ioperm() and iopl() syscalls which are necessary for legacy applications. |
c8137ace5 x86/iopl: Restric... |
1187 1188 1189 1190 1191 1192 1193 1194 |
Legacy IOPL support is an overbroad mechanism which allows user space aside of accessing all 65536 I/O ports also to disable interrupts. To gain this access the caller needs CAP_SYS_RAWIO capabilities and permission from potentially active security modules. The emulation restricts the functionality of the syscall to only allowing the full range I/O port access, but prevents the |
a24ca9976 x86/iopl: Remove ... |
1195 1196 |
ability to disable interrupts from user space which would be granted if the hardware IOPL mechanism would be used. |
c8137ace5 x86/iopl: Restric... |
1197 |
|
506f1d07b x86: move the res... |
1198 1199 1200 |
config TOSHIBA tristate "Toshiba Laptop support" depends on X86_32 |
a7f7f6248 treewide: replace... |
1201 |
help |
506f1d07b x86: move the res... |
1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 |
This adds a driver to safely access the System Management Mode of the CPU on Toshiba portables with a genuine Toshiba BIOS. It does not work on models with a Phoenix BIOS. The System Management Mode is used to set the BIOS and power saving options on Toshiba portables. For information on utilities to make use of this driver see the Toshiba Linux utilities web site at: <http://www.buzzard.org.uk/toshiba/>. Say Y if you intend to run this kernel on a Toshiba portable. Say N otherwise. config I8K |
039ae5850 hwmon: Allow to c... |
1215 |
tristate "Dell i8k legacy laptop support" |
949a9d700 i8k: Integrate wi... |
1216 |
select HWMON |
039ae5850 hwmon: Allow to c... |
1217 |
select SENSORS_DELL_SMM |
a7f7f6248 treewide: replace... |
1218 |
help |
039ae5850 hwmon: Allow to c... |
1219 1220 1221 1222 1223 1224 1225 1226 1227 |
This option enables legacy /proc/i8k userspace interface in hwmon dell-smm-hwmon driver. Character file /proc/i8k reports bios version, temperature and allows controlling fan speeds of Dell laptops via System Management Mode. For old Dell laptops (like Dell Inspiron 8000) it reports also power and hotkey status. For fan speed control is needed userspace package i8kutils. Say Y if you intend to run this kernel on old Dell laptops or want to use userspace package i8kutils. |
506f1d07b x86: move the res... |
1228 1229 1230 |
Say N otherwise. config X86_REBOOTFIXUPS |
9ba16087d Kconfig: eliminat... |
1231 1232 |
bool "Enable X86 board specific fixups for reboot" depends on X86_32 |
a7f7f6248 treewide: replace... |
1233 |
help |
506f1d07b x86: move the res... |
1234 1235 1236 1237 1238 1239 1240 |
This enables chipset and/or board specific fixups to be done in order to get reboot to work correctly. This is only needed on some combinations of hardware and BIOS. The symptom, for which this config is intended, is when reboot ends with a stalled/hung system. Currently, the only fixup is for the Geode machines using |
5e3a77e9a x86: add support ... |
1241 |
CS5530A and CS5536 chipsets and the RDC R-321x SoC. |
506f1d07b x86: move the res... |
1242 1243 1244 1245 1246 1247 |
Say Y if you want to enable the fixup. Currently, it's safe to enable this option even if you don't need it. Say N otherwise. config MICROCODE |
9a2bc335f x86/microcode: Un... |
1248 1249 |
bool "CPU microcode loading support" default y |
80030e3d8 x86/microcode: Co... |
1250 |
depends on CPU_SUP_AMD || CPU_SUP_INTEL |
a7f7f6248 treewide: replace... |
1251 |
help |
506f1d07b x86: move the res... |
1252 |
If you say Y here, you will be able to update the microcode on |
5f9c01aa7 x86/microcode: Un... |
1253 1254 1255 1256 1257 1258 1259 |
Intel and AMD processors. The Intel support is for the IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, Pentium 4, Xeon etc. The AMD support is for families 0x10 and later. You will obviously need the actual microcode binary data itself which is not shipped with the Linux kernel. The preferred method to load microcode from a detached initrd is described |
cb1aaebea docs: fix broken ... |
1260 |
in Documentation/x86/microcode.rst. For that you need to enable |
5f9c01aa7 x86/microcode: Un... |
1261 1262 |
CONFIG_BLK_DEV_INITRD in order for the loader to be able to scan the initrd for microcode blobs. |
c508c46e6 firmware: Fix up ... |
1263 1264 1265 |
In addition, you can build the microcode into the kernel. For that you need to add the vendor-supplied microcode to the CONFIG_EXTRA_FIRMWARE config option. |
506f1d07b x86: move the res... |
1266 |
|
8d86f390d x86: major refact... |
1267 |
config MICROCODE_INTEL |
e43f6e67e x86, microcode: S... |
1268 |
bool "Intel microcode loading support" |
8f9ca475c x86: clean up arc... |
1269 1270 |
depends on MICROCODE default MICROCODE |
a7f7f6248 treewide: replace... |
1271 |
help |
8f9ca475c x86: clean up arc... |
1272 1273 |
This options enables microcode patch loading support for Intel processors. |
b8989db9d x86, doc, kconfig... |
1274 1275 1276 |
For the current Intel microcode data package go to <https://downloadcenter.intel.com> and search for 'Linux Processor Microcode Data File'. |
8d86f390d x86: major refact... |
1277 |
|
80cc9f102 x86: AMD microcod... |
1278 |
config MICROCODE_AMD |
e43f6e67e x86, microcode: S... |
1279 |
bool "AMD microcode loading support" |
8f9ca475c x86: clean up arc... |
1280 |
depends on MICROCODE |
a7f7f6248 treewide: replace... |
1281 |
help |
8f9ca475c x86: clean up arc... |
1282 1283 |
If you select this option, microcode patch loading support for AMD processors will be enabled. |
80cc9f102 x86: AMD microcod... |
1284 |
|
8f9ca475c x86: clean up arc... |
1285 |
config MICROCODE_OLD_INTERFACE |
c02f48e07 x86/microcode: De... |
1286 1287 |
bool "Ancient loading interface (DEPRECATED)" default n |
506f1d07b x86: move the res... |
1288 |
depends on MICROCODE |
a7f7f6248 treewide: replace... |
1289 |
help |
c02f48e07 x86/microcode: De... |
1290 1291 1292 1293 1294 |
DO NOT USE THIS! This is the ancient /dev/cpu/microcode interface which was used by userspace tools like iucode_tool and microcode.ctl. It is inadequate because it runs too late to be able to properly load microcode on a machine and it needs special tools. Instead, you should've switched to the early loading method with the initrd or |
cb1aaebea docs: fix broken ... |
1295 |
builtin microcode by now: Documentation/x86/microcode.rst |
506f1d07b x86: move the res... |
1296 1297 1298 |
config X86_MSR tristate "/dev/cpu/*/msr - Model-specific register support" |
a7f7f6248 treewide: replace... |
1299 |
help |
506f1d07b x86: move the res... |
1300 1301 1302 1303 1304 1305 1306 1307 |
This device gives privileged processes access to the x86 Model-Specific Registers (MSRs). It is a character device with major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. MSR accesses are directed to a specific CPU on multi-processor systems. config X86_CPUID tristate "/dev/cpu/*/cpuid - CPU information support" |
a7f7f6248 treewide: replace... |
1308 |
help |
506f1d07b x86: move the res... |
1309 1310 1311 1312 1313 1314 1315 |
This device gives processes access to the x86 CPUID instruction to be executed on a specific processor. It is a character device with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to /dev/cpu/31/cpuid. choice prompt "High Memory Support" |
6fc108a08 x86: Clean up arc... |
1316 |
default HIGHMEM4G |
506f1d07b x86: move the res... |
1317 1318 1319 1320 |
depends on X86_32 config NOHIGHMEM bool "off" |
a7f7f6248 treewide: replace... |
1321 |
help |
506f1d07b x86: move the res... |
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 |
Linux can use up to 64 Gigabytes of physical memory on x86 systems. However, the address space of 32-bit x86 processors is only 4 Gigabytes large. That means that, if you have a large amount of physical memory, not all of it can be "permanently mapped" by the kernel. The physical memory that's not permanently mapped is called "high memory". If you are compiling a kernel which will never run on a machine with more than 1 Gigabyte total physical RAM, answer "off" here (default choice and suitable for most users). This will result in a "3GB/1GB" split: 3GB are mapped so that each process sees a 3GB virtual memory space and the remaining part of the 4GB virtual memory space is used by the kernel to permanently map as much physical memory as possible. If the machine has between 1 and 4 Gigabytes physical RAM, then answer "4GB" here. If more than 4 Gigabytes is used then answer "64GB" here. This selection turns Intel PAE (Physical Address Extension) mode on. PAE implements 3-level paging on IA32 processors. PAE is fully supported by Linux, PAE mode is implemented on all recent Intel processors (Pentium Pro and better). NOTE: If you say "64GB" here, then the kernel will not boot on CPUs that don't support PAE! The actual amount of total physical memory will either be auto detected or can be forced by using a kernel command line option such as "mem=256M". (Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) If unsure, say "off". config HIGHMEM4G bool "4GB" |
a7f7f6248 treewide: replace... |
1357 |
help |
506f1d07b x86: move the res... |
1358 1359 1360 1361 1362 |
Select this if you have a 32-bit processor and between 1 and 4 gigabytes of physical RAM. config HIGHMEM64G bool "64GB" |
69b8d3fca x86/Kconfig: Excl... |
1363 |
depends on !M486 && !M586 && !M586TSC && !M586MMX && !MGEODE_LX && !MGEODEGX1 && !MCYRIXIII && !MELAN && !MWINCHIPC6 && !WINCHIP3D && !MK6 |
506f1d07b x86: move the res... |
1364 |
select X86_PAE |
a7f7f6248 treewide: replace... |
1365 |
help |
506f1d07b x86: move the res... |
1366 1367 1368 1369 1370 1371 |
Select this if you have a 32-bit processor and more than 4 gigabytes of physical RAM. endchoice choice |
6a108a14f kconfig: rename C... |
1372 |
prompt "Memory split" if EXPERT |
506f1d07b x86: move the res... |
1373 1374 |
default VMSPLIT_3G depends on X86_32 |
a7f7f6248 treewide: replace... |
1375 |
help |
506f1d07b x86: move the res... |
1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 |
Select the desired split between kernel and user memory. If the address range available to the kernel is less than the physical memory installed, the remaining memory will be available as "high memory". Accessing high memory is a little more costly than low memory, as it needs to be mapped into the kernel first. Note that increasing the kernel address space limits the range available to user programs, making the address space there tighter. Selecting anything other than the default 3G/1G split will also likely make your kernel incompatible with binary-only kernel modules. If you are not absolutely sure what you are doing, leave this option alone! config VMSPLIT_3G bool "3G/1G user/kernel split" config VMSPLIT_3G_OPT depends on !X86_PAE bool "3G/1G user/kernel split (for full 1G low memory)" config VMSPLIT_2G bool "2G/2G user/kernel split" config VMSPLIT_2G_OPT depends on !X86_PAE bool "2G/2G user/kernel split (for full 2G low memory)" config VMSPLIT_1G bool "1G/3G user/kernel split" endchoice config PAGE_OFFSET hex default 0xB0000000 if VMSPLIT_3G_OPT default 0x80000000 if VMSPLIT_2G default 0x78000000 if VMSPLIT_2G_OPT default 0x40000000 if VMSPLIT_1G default 0xC0000000 depends on X86_32 config HIGHMEM |
3c2362e62 x86: use def_bool... |
1415 |
def_bool y |
506f1d07b x86: move the res... |
1416 |
depends on X86_32 && (HIGHMEM64G || HIGHMEM4G) |
506f1d07b x86: move the res... |
1417 1418 |
config X86_PAE |
9ba16087d Kconfig: eliminat... |
1419 |
bool "PAE (Physical Address Extension) Support" |
506f1d07b x86: move the res... |
1420 |
depends on X86_32 && !HIGHMEM4G |
d4a451d5f arch: remove the ... |
1421 |
select PHYS_ADDR_T_64BIT |
9d99c7123 swiotlb: Enable i... |
1422 |
select SWIOTLB |
a7f7f6248 treewide: replace... |
1423 |
help |
506f1d07b x86: move the res... |
1424 1425 1426 1427 |
PAE is required for NX support, and furthermore enables larger swapspace support for non-overcommit purposes. It has the cost of more pagetable lookup overhead, and also consumes more pagetable space per process. |
77ef56e4f x86: Enable 5-lev... |
1428 1429 |
config X86_5LEVEL bool "Enable 5-level page tables support" |
18ec1eaf5 x86/mm: Enable 5-... |
1430 |
default y |
eedb92abb x86/mm: Make virt... |
1431 |
select DYNAMIC_MEMORY_LAYOUT |
162434e7f x86/mm: Make MAX_... |
1432 |
select SPARSEMEM_VMEMMAP |
77ef56e4f x86: Enable 5-lev... |
1433 |
depends on X86_64 |
a7f7f6248 treewide: replace... |
1434 |
help |
77ef56e4f x86: Enable 5-lev... |
1435 1436 1437 1438 1439 |
5-level paging enables access to larger address space: upto 128 PiB of virtual address space and 4 PiB of physical address space. It will be supported by future Intel CPUs. |
6657fca06 x86/mm: Allow to ... |
1440 1441 |
A kernel with the option enabled can be booted on machines that support 4- or 5-level paging. |
77ef56e4f x86: Enable 5-lev... |
1442 |
|
cb1aaebea docs: fix broken ... |
1443 |
See Documentation/x86/x86_64/5level-paging.rst for more |
77ef56e4f x86: Enable 5-lev... |
1444 1445 1446 |
information. Say N if unsure. |
10971ab26 x86/mm: Further s... |
1447 |
config X86_DIRECT_GBPAGES |
e5008abe9 x86/mm: Simplify ... |
1448 |
def_bool y |
2e1da13fb x86/kconfig: Remo... |
1449 |
depends on X86_64 |
a7f7f6248 treewide: replace... |
1450 |
help |
10971ab26 x86/mm: Further s... |
1451 1452 1453 1454 |
Certain kernel features effectively disable kernel linear 1 GB mappings (even if the CPU otherwise supports them), so don't confuse the user by printing that we have them enabled. |
9e899816d x86, mm: enable G... |
1455 |
|
5c280cf60 x86/mm/cpa: Add l... |
1456 1457 1458 |
config X86_CPA_STATISTICS bool "Enable statistic for Change Page Attribute" depends on DEBUG_FS |
a7f7f6248 treewide: replace... |
1459 |
help |
b75baaf3a x86/mm/pat: Fix t... |
1460 |
Expose statistics about the Change Page Attribute mechanism, which |
a943245ad x86/Kconfig: Fix ... |
1461 |
helps to determine the effectiveness of preserving large and huge |
5c280cf60 x86/mm/cpa: Add l... |
1462 |
page mappings when mapping protections are changed. |
7744ccdbc x86/mm: Add Secur... |
1463 1464 1465 |
config AMD_MEM_ENCRYPT bool "AMD Secure Memory Encryption (SME) support" depends on X86_64 && CPU_SUP_AMD |
82fef0ad8 x86/mm: unencrypt... |
1466 |
select DMA_COHERENT_POOL |
94d49eb30 x86/mm: Decouple ... |
1467 |
select DYNAMIC_PHYSICAL_MASK |
ce9084ba0 x86: Make ARCH_US... |
1468 |
select ARCH_USE_MEMREMAP_PROT |
9087c3758 dma-direct: Force... |
1469 |
select ARCH_HAS_FORCE_DMA_UNENCRYPTED |
597cfe482 x86/boot/compress... |
1470 |
select INSTRUCTION_DECODER |
a7f7f6248 treewide: replace... |
1471 |
help |
7744ccdbc x86/mm: Add Secur... |
1472 1473 1474 1475 1476 1477 1478 1479 |
Say yes to enable support for the encryption of system memory. This requires an AMD processor that supports Secure Memory Encryption (SME). config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT bool "Activate AMD Secure Memory Encryption (SME) by default" default y depends on AMD_MEM_ENCRYPT |
a7f7f6248 treewide: replace... |
1480 |
help |
7744ccdbc x86/mm: Add Secur... |
1481 1482 1483 1484 1485 1486 1487 1488 |
Say yes to have system memory encrypted by default if running on an AMD processor that supports Secure Memory Encryption (SME). If set to Y, then the encryption of system memory can be deactivated with the mem_encrypt=off command line option. If set to N, then the encryption of system memory can be activated with the mem_encrypt=on command line option. |
506f1d07b x86: move the res... |
1489 1490 |
# Common NUMA Features config NUMA |
e133f6eac x86/Kconfig: Corr... |
1491 |
bool "NUMA Memory Allocation and Scheduler Support" |
506f1d07b x86: move the res... |
1492 |
depends on SMP |
b5660ba76 x86, platforms: R... |
1493 1494 |
depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP) default y if X86_BIGSMP |
a7f7f6248 treewide: replace... |
1495 |
help |
e133f6eac x86/Kconfig: Corr... |
1496 |
Enable NUMA (Non-Uniform Memory Access) support. |
fd51b2d7d x86: update CONFI... |
1497 |
|
506f1d07b x86: move the res... |
1498 1499 1500 |
The kernel will try to allocate memory used by a CPU on the local memory controller of the CPU and add some more NUMA awareness to the kernel. |
c280ea5e4 x86: fix document... |
1501 |
For 64-bit this is recommended if the system is Intel Core i7 |
fd51b2d7d x86: update CONFI... |
1502 |
(or later), AMD Opteron, or EM64T NUMA. |
b5660ba76 x86, platforms: R... |
1503 |
For 32-bit this is only needed if you boot a 32-bit |
7cf6c9459 x86, apic: Remove... |
1504 |
kernel on a 64-bit NUMA platform. |
fd51b2d7d x86: update CONFI... |
1505 1506 |
Otherwise, you should say N. |
506f1d07b x86: move the res... |
1507 |
|
eec1d4fa0 x86, amd-nb: Comp... |
1508 |
config AMD_NUMA |
3c2362e62 x86: use def_bool... |
1509 1510 |
def_bool y prompt "Old style AMD Opteron NUMA detection" |
5da0ef9a8 x86: Disable AMD_... |
1511 |
depends on X86_64 && NUMA && PCI |
a7f7f6248 treewide: replace... |
1512 |
help |
eec1d4fa0 x86, amd-nb: Comp... |
1513 1514 1515 1516 1517 |
Enable AMD NUMA node topology detection. You should say Y here if you have a multi processor AMD system. This uses an old method to read the NUMA configuration directly from the builtin Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA instead, which also takes priority if both are compiled in. |
506f1d07b x86: move the res... |
1518 1519 |
config X86_64_ACPI_NUMA |
3c2362e62 x86: use def_bool... |
1520 1521 |
def_bool y prompt "ACPI NUMA detection" |
506f1d07b x86: move the res... |
1522 1523 |
depends on X86_64 && NUMA && ACPI && PCI select ACPI_NUMA |
a7f7f6248 treewide: replace... |
1524 |
help |
506f1d07b x86: move the res... |
1525 1526 1527 1528 |
Enable ACPI SRAT based node topology detection. config NUMA_EMU bool "NUMA emulation" |
1b7e03ef7 x86, NUMA: Enable... |
1529 |
depends on NUMA |
a7f7f6248 treewide: replace... |
1530 |
help |
506f1d07b x86: move the res... |
1531 1532 1533 1534 1535 |
Enable NUMA emulation. A flat machine will be split into virtual nodes when booted with "numa=fake=N", where N is the number of nodes. This is only useful for debugging. config NODES_SHIFT |
d25e26b61 [x86] Clean up MA... |
1536 |
int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP |
51591e31d x86: Increase CON... |
1537 1538 |
range 1 10 default "10" if MAXSMP |
506f1d07b x86: move the res... |
1539 |
default "6" if X86_64 |
506f1d07b x86: move the res... |
1540 1541 |
default "3" depends on NEED_MULTIPLE_NODES |
a7f7f6248 treewide: replace... |
1542 |
help |
1184dc2ff x86: modify Kconf... |
1543 |
Specify the maximum number of NUMA Nodes available on the target |
692105b8a trivial: fix typo... |
1544 |
system. Increases memory reserved to accommodate various tables. |
506f1d07b x86: move the res... |
1545 |
|
506f1d07b x86: move the res... |
1546 1547 |
config ARCH_FLATMEM_ENABLE def_bool y |
3b16651f8 x86: Clean up mem... |
1548 |
depends on X86_32 && !NUMA |
506f1d07b x86: move the res... |
1549 |
|
506f1d07b x86: move the res... |
1550 1551 |
config ARCH_SPARSEMEM_ENABLE def_bool y |
6ea303864 arch/x86: remove ... |
1552 |
depends on X86_64 || NUMA || X86_32 || X86_32_NON_STANDARD |
506f1d07b x86: move the res... |
1553 1554 |
select SPARSEMEM_STATIC if X86_32 select SPARSEMEM_VMEMMAP_ENABLE if X86_64 |
3b16651f8 x86: Clean up mem... |
1555 |
config ARCH_SPARSEMEM_DEFAULT |
6ad57f7f2 x86/Kconfig: Make... |
1556 |
def_bool X86_64 || (NUMA && X86_32) |
3b16651f8 x86: Clean up mem... |
1557 |
|
506f1d07b x86: move the res... |
1558 1559 |
config ARCH_SELECT_MEMORY_MODEL def_bool y |
b263295db x86: 64-bit, make... |
1560 |
depends on ARCH_SPARSEMEM_ENABLE |
506f1d07b x86: move the res... |
1561 1562 |
config ARCH_MEMORY_PROBE |
a0842b704 mm/hotplug, x86: ... |
1563 |
bool "Enable sysfs memory/probe interface" |
3120e25ef x86/Kconfig: Clea... |
1564 |
depends on X86_64 && MEMORY_HOTPLUG |
a0842b704 mm/hotplug, x86: ... |
1565 1566 |
help This option enables a sysfs memory/probe interface for testing. |
cb1aaebea docs: fix broken ... |
1567 |
See Documentation/admin-guide/mm/memory-hotplug.rst for more information. |
a0842b704 mm/hotplug, x86: ... |
1568 |
If you are unsure how to answer this question, answer N. |
506f1d07b x86: move the res... |
1569 |
|
3b16651f8 x86: Clean up mem... |
1570 1571 1572 |
config ARCH_PROC_KCORE_TEXT def_bool y depends on X86_64 && PROC_KCORE |
a29815a33 core, x86: make L... |
1573 |
config ILLEGAL_POINTER_VALUE |
b03b016fe x86/Kconfig: Fix ... |
1574 1575 1576 |
hex default 0 if X86_32 default 0xdead000000000000 if X86_64 |
a29815a33 core, x86: make L... |
1577 |
|
7a67832c7 libnvdimm, e820: ... |
1578 1579 |
config X86_PMEM_LEGACY_DEVICE bool |
ec776ef6b x86/mm: Add suppo... |
1580 |
config X86_PMEM_LEGACY |
7a67832c7 libnvdimm, e820: ... |
1581 |
tristate "Support non-standard NVDIMMs and ADR protected memory" |
9f53f9fa4 libnvdimm, pmem: ... |
1582 1583 |
depends on PHYS_ADDR_T_64BIT depends on BLK_DEV |
7a67832c7 libnvdimm, e820: ... |
1584 |
select X86_PMEM_LEGACY_DEVICE |
7b27a8622 libnvdimm/e820: R... |
1585 |
select NUMA_KEEP_MEMINFO if NUMA |
9f53f9fa4 libnvdimm, pmem: ... |
1586 |
select LIBNVDIMM |
ec776ef6b x86/mm: Add suppo... |
1587 1588 1589 1590 1591 1592 1593 |
help Treat memory marked using the non-standard e820 type of 12 as used by the Intel Sandy Bridge-EP reference BIOS as protected memory. The kernel will offer these regions to the 'pmem' driver so they can be used for persistent storage. Say Y if unsure. |
506f1d07b x86: move the res... |
1594 1595 |
config HIGHPTE bool "Allocate 3rd-level pagetables from highmem" |
6fc108a08 x86: Clean up arc... |
1596 |
depends on HIGHMEM |
a7f7f6248 treewide: replace... |
1597 |
help |
506f1d07b x86: move the res... |
1598 1599 1600 1601 |
The VM uses one page table entry for each page of physical memory. For systems with a lot of RAM, this can be wasteful of precious low memory. Setting this option will put user-space page table entries in high memory. |
9f077871c x86: clean up mem... |
1602 |
config X86_CHECK_BIOS_CORRUPTION |
8f9ca475c x86: clean up arc... |
1603 |
bool "Check for low memory corruption" |
a7f7f6248 treewide: replace... |
1604 |
help |
8f9ca475c x86: clean up arc... |
1605 1606 1607 1608 1609 1610 1611 |
Periodically check for memory corruption in low memory, which is suspected to be caused by BIOS. Even when enabled in the configuration, it is disabled at runtime. Enable it by setting "memory_corruption_check=1" on the kernel command line. By default it scans the low 64k of memory every 60 seconds; see the memory_corruption_check_size and memory_corruption_check_period parameters in |
8c27ceff3 docs: fix locatio... |
1612 |
Documentation/admin-guide/kernel-parameters.rst to adjust this. |
8f9ca475c x86: clean up arc... |
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 |
When enabled with the default parameters, this option has almost no overhead, as it reserves a relatively small amount of memory and scans it infrequently. It both detects corruption and prevents it from affecting the running system. It is, however, intended as a diagnostic tool; if repeatable BIOS-originated corruption always affects the same memory, you can use memmap= to prevent the kernel from using that memory. |
9f077871c x86: clean up mem... |
1623 |
|
c885df50f x86: default corr... |
1624 |
config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK |
8f9ca475c x86: clean up arc... |
1625 |
bool "Set the default setting of memory_corruption_check" |
c885df50f x86: default corr... |
1626 1627 |
depends on X86_CHECK_BIOS_CORRUPTION default y |
a7f7f6248 treewide: replace... |
1628 |
help |
8f9ca475c x86: clean up arc... |
1629 1630 |
Set whether the default state of memory_corruption_check is on or off. |
c885df50f x86: default corr... |
1631 |
|
9ea77bdb3 x86, bios: Make t... |
1632 |
config X86_RESERVE_LOW |
d0cd7425f x86, bios: By def... |
1633 1634 1635 |
int "Amount of low memory, in kilobytes, to reserve for the BIOS" default 64 range 4 640 |
a7f7f6248 treewide: replace... |
1636 |
help |
d0cd7425f x86, bios: By def... |
1637 1638 1639 1640 1641 1642 1643 1644 1645 |
Specify the amount of low memory to reserve for the BIOS. The first page contains BIOS data structures that the kernel must not use, so that page must always be reserved. By default we reserve the first 64K of physical RAM, as a number of BIOSes are known to corrupt that memory range during events such as suspend/resume or monitor cable insertion, so it must not be used by the kernel. |
fc3815194 x86: add X86_RESE... |
1646 |
|
d0cd7425f x86, bios: By def... |
1647 1648 1649 1650 1651 |
You can set this to 4 if you are absolutely sure that you trust the BIOS to get all its memory reservations and usages right. If you know your BIOS have problems beyond the default 64K area, you can set this to 640 to avoid using the entire low memory range. |
fc3815194 x86: add X86_RESE... |
1652 |
|
d0cd7425f x86, bios: By def... |
1653 1654 1655 1656 1657 |
If you have doubts about the BIOS (e.g. suspend/resume does not work or there's kernel crashes after certain hardware hotplug events) then you might want to enable X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical corruption patterns. |
fc3815194 x86: add X86_RESE... |
1658 |
|
d0cd7425f x86, bios: By def... |
1659 |
Leave this to the default value of 64 if you are unsure. |
fc3815194 x86: add X86_RESE... |
1660 |
|
506f1d07b x86: move the res... |
1661 1662 |
config MATH_EMULATION bool |
a5b9e5a2f x86/ldt: Make mod... |
1663 |
depends on MODIFY_LDT_SYSCALL |
87d6021b8 x86/math-emu: Lim... |
1664 |
prompt "Math emulation" if X86_32 && (M486SX || MELAN) |
a7f7f6248 treewide: replace... |
1665 |
help |
506f1d07b x86: move the res... |
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 |
Linux can emulate a math coprocessor (used for floating point operations) if you don't have one. 486DX and Pentium processors have a math coprocessor built in, 486SX and 386 do not, unless you added a 487DX or 387, respectively. (The messages during boot time can give you some hints here ["man dmesg"].) Everyone needs either a coprocessor or this emulation. If you don't have a math coprocessor, you need to say Y here; if you say Y here even though you have a coprocessor, the coprocessor will be used nevertheless. (This behavior can be changed with the kernel command line option "no387", which comes handy if your coprocessor is broken. Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) This means that it is a good idea to say Y here if you intend to use this kernel on different machines. More information about the internals of the Linux math coprocessor emulation can be found in <file:arch/x86/math-emu/README>. If you are not sure, say Y; apart from resulting in a 66 KB bigger kernel, it won't hurt. config MTRR |
6fc108a08 x86: Clean up arc... |
1689 |
def_bool y |
6a108a14f kconfig: rename C... |
1690 |
prompt "MTRR (Memory Type Range Register) support" if EXPERT |
a7f7f6248 treewide: replace... |
1691 |
help |
506f1d07b x86: move the res... |
1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 |
On Intel P6 family processors (Pentium Pro, Pentium II and later) the Memory Type Range Registers (MTRRs) may be used to control processor access to memory ranges. This is most useful if you have a video (VGA) card on a PCI or AGP bus. Enabling write-combining allows bus write transfers to be combined into a larger transfer before bursting over the PCI/AGP bus. This can increase performance of image write operations 2.5 times or more. Saying Y here creates a /proc/mtrr file which may be used to manipulate your processor's MTRRs. Typically the X server should use this. This code has a reasonably generic interface so that similar control registers on other processors can be easily supported as well: The Cyrix 6x86, 6x86MX and M II processors have Address Range Registers (ARRs) which provide a similar functionality to MTRRs. For these, the ARRs are used to emulate the MTRRs. The AMD K6-2 (stepping 8 and above) and K6-3 processors have two MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. All of these processors are supported by this code and it makes sense to say Y here if you have one of them. Saying Y here also fixes a problem with buggy SMP BIOSes which only set the MTRRs for the boot CPU and not for the secondary CPUs. This can lead to all sorts of problems, so it's good to say Y here. You can safely say Y even if your machine doesn't have MTRRs, you'll just add about 9 KB to your kernel. |
cb1aaebea docs: fix broken ... |
1720 |
See <file:Documentation/x86/mtrr.rst> for more information. |
506f1d07b x86: move the res... |
1721 |
|
95ffa2438 x86: mtrr cleanup... |
1722 |
config MTRR_SANITIZER |
2ffb3501f x86: change MTRR_... |
1723 |
def_bool y |
95ffa2438 x86: mtrr cleanup... |
1724 1725 |
prompt "MTRR cleanup support" depends on MTRR |
a7f7f6248 treewide: replace... |
1726 |
help |
aba3728ce x86: sanitize Kco... |
1727 1728 |
Convert MTRR layout from continuous to discrete, so X drivers can add writeback entries. |
95ffa2438 x86: mtrr cleanup... |
1729 |
|
aba3728ce x86: sanitize Kco... |
1730 |
Can be disabled with disable_mtrr_cleanup on the kernel command line. |
692105b8a trivial: fix typo... |
1731 |
The largest mtrr entry size for a continuous block can be set with |
aba3728ce x86: sanitize Kco... |
1732 |
mtrr_chunk_size. |
95ffa2438 x86: mtrr cleanup... |
1733 |
|
2ffb3501f x86: change MTRR_... |
1734 |
If unsure, say Y. |
95ffa2438 x86: mtrr cleanup... |
1735 1736 |
config MTRR_SANITIZER_ENABLE_DEFAULT |
f5098d62c x86: mtrr cleanup... |
1737 1738 1739 |
int "MTRR cleanup enable value (0-1)" range 0 1 default "0" |
95ffa2438 x86: mtrr cleanup... |
1740 |
depends on MTRR_SANITIZER |
a7f7f6248 treewide: replace... |
1741 |
help |
f5098d62c x86: mtrr cleanup... |
1742 |
Enable mtrr cleanup default value |
95ffa2438 x86: mtrr cleanup... |
1743 |
|
12031a624 x86: mtrr cleanup... |
1744 1745 1746 1747 1748 |
config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT int "MTRR cleanup spare reg num (0-7)" range 0 7 default "1" depends on MTRR_SANITIZER |
a7f7f6248 treewide: replace... |
1749 |
help |
12031a624 x86: mtrr cleanup... |
1750 |
mtrr cleanup spare entries default, it can be changed via |
aba3728ce x86: sanitize Kco... |
1751 |
mtrr_spare_reg_nr=N on the kernel command line. |
12031a624 x86: mtrr cleanup... |
1752 |
|
2e5d9c857 x86: PAT infrastr... |
1753 |
config X86_PAT |
6fc108a08 x86: Clean up arc... |
1754 |
def_bool y |
6a108a14f kconfig: rename C... |
1755 |
prompt "x86 PAT support" if EXPERT |
2a8a2719b x86 PAT: decouple... |
1756 |
depends on MTRR |
a7f7f6248 treewide: replace... |
1757 |
help |
2e5d9c857 x86: PAT infrastr... |
1758 |
Use PAT attributes to setup page level cache control. |
042b78e4d x86: PAT infrastr... |
1759 |
|
2e5d9c857 x86: PAT infrastr... |
1760 1761 1762 1763 |
PATs are the modern equivalents of MTRRs and are much more flexible than MTRRs. Say N here if you see bootup problems (boot crash, boot hang, |
042b78e4d x86: PAT infrastr... |
1764 |
spontaneous reboots) or a non-working video driver. |
2e5d9c857 x86: PAT infrastr... |
1765 1766 |
If unsure, say Y. |
46cf98cda x86, pat: General... |
1767 1768 1769 |
config ARCH_USES_PG_UNCACHED def_bool y depends on X86_PAT |
628c6246d x86, random: Arch... |
1770 1771 1772 |
config ARCH_RANDOM def_bool y prompt "x86 architectural random number generator" if EXPERT |
a7f7f6248 treewide: replace... |
1773 |
help |
628c6246d x86, random: Arch... |
1774 1775 1776 1777 |
Enable the x86 architectural RDRAND instruction (Intel Bull Mountain technology) to generate random numbers. If supported, this is a high bandwidth, cryptographically secure hardware random number generator. |
51ae4a2d7 x86, smap: Add a ... |
1778 1779 1780 |
config X86_SMAP def_bool y prompt "Supervisor Mode Access Prevention" if EXPERT |
a7f7f6248 treewide: replace... |
1781 |
help |
51ae4a2d7 x86, smap: Add a ... |
1782 1783 1784 1785 1786 1787 |
Supervisor Mode Access Prevention (SMAP) is a security feature in newer Intel processors. There is a small performance cost if this enabled and turned on; there is also a small increase in the kernel size if this is enabled. If unsure, say Y. |
b971880fe x86/Kconfig: Rena... |
1788 |
config X86_UMIP |
796ebc81b x86/umip: Select ... |
1789 |
def_bool y |
b971880fe x86/Kconfig: Rena... |
1790 |
prompt "User Mode Instruction Prevention" if EXPERT |
a7f7f6248 treewide: replace... |
1791 |
help |
b971880fe x86/Kconfig: Rena... |
1792 1793 1794 1795 1796 |
User Mode Instruction Prevention (UMIP) is a security feature in some x86 processors. If enabled, a general protection fault is issued if the SGDT, SLDT, SIDT, SMSW or STR instructions are executed in user mode. These instructions unnecessarily expose information about the hardware state. |
796ebc81b x86/umip: Select ... |
1797 1798 1799 1800 1801 |
The vast majority of applications do not use these instructions. For the very few that do, software emulation is provided in specific cases in protected and virtual-8086 modes. Emulated results are dummy. |
aa35f8969 x86/umip: Enable ... |
1802 |
|
35e97790f x86/mm/pkeys: Add... |
1803 |
config X86_INTEL_MEMORY_PROTECTION_KEYS |
38f3e775e x86/Kconfig: Upda... |
1804 |
prompt "Memory Protection Keys" |
35e97790f x86/mm/pkeys: Add... |
1805 |
def_bool y |
284244a98 x86/mm/pkeys: Add... |
1806 |
# Note: only available in 64-bit mode |
38f3e775e x86/Kconfig: Upda... |
1807 |
depends on X86_64 && (CPU_SUP_INTEL || CPU_SUP_AMD) |
52c8e6017 x86/kconfig, x86/... |
1808 1809 |
select ARCH_USES_HIGH_VMA_FLAGS select ARCH_HAS_PKEYS |
a7f7f6248 treewide: replace... |
1810 |
help |
284244a98 x86/mm/pkeys: Add... |
1811 1812 1813 |
Memory Protection Keys provides a mechanism for enforcing page-based protections, but without requiring modification of the page tables when an application changes protection domains. |
1eecbcdca docs: move protec... |
1814 |
For details, see Documentation/core-api/protection-keys.rst |
284244a98 x86/mm/pkeys: Add... |
1815 1816 |
If unsure, say y. |
35e97790f x86/mm/pkeys: Add... |
1817 |
|
db616173d x86/tsx: Add conf... |
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 |
choice prompt "TSX enable mode" depends on CPU_SUP_INTEL default X86_INTEL_TSX_MODE_OFF help Intel's TSX (Transactional Synchronization Extensions) feature allows to optimize locking protocols through lock elision which can lead to a noticeable performance boost. On the other hand it has been shown that TSX can be exploited to form side channel attacks (e.g. TAA) and chances are there will be more of those attacks discovered in the future. Therefore TSX is not enabled by default (aka tsx=off). An admin might override this decision by tsx=on the command line parameter. Even with TSX enabled, the kernel will attempt to enable the best possible TAA mitigation setting depending on the microcode available for the particular machine. This option allows to set the default tsx mode between tsx=on, =off and =auto. See Documentation/admin-guide/kernel-parameters.txt for more details. Say off if not sure, auto if TSX is in use but it should be used on safe platforms or on if TSX is in use and the security aspect of tsx is not relevant. config X86_INTEL_TSX_MODE_OFF bool "off" help TSX is disabled if possible - equals to tsx=off command line parameter. config X86_INTEL_TSX_MODE_ON bool "on" help TSX is always enabled on TSX capable HW - equals the tsx=on command line parameter. config X86_INTEL_TSX_MODE_AUTO bool "auto" help TSX is enabled on TSX capable HW that is believed to be safe against side channel attacks- equals the tsx=auto command line parameter. endchoice |
506f1d07b x86: move the res... |
1862 |
config EFI |
9ba16087d Kconfig: eliminat... |
1863 |
bool "EFI runtime service support" |
5b83683f3 x86: EFI runtime ... |
1864 |
depends on ACPI |
f6ce50026 x86/Kconfig: Make... |
1865 |
select UCS2_STRING |
022ee6c55 efi/x86: Move UEF... |
1866 |
select EFI_RUNTIME_WRAPPERS |
a7f7f6248 treewide: replace... |
1867 |
help |
8f9ca475c x86: clean up arc... |
1868 1869 |
This enables the kernel to use EFI runtime services that are available (such as the EFI variable services). |
506f1d07b x86: move the res... |
1870 |
|
8f9ca475c x86: clean up arc... |
1871 1872 1873 1874 1875 1876 |
This option is only useful on systems that have EFI firmware. In addition, you should use the latest ELILO loader available at <http://elilo.sourceforge.net> in order to take advantage of EFI runtime services. However, even with this option, the resultant kernel should continue to boot on existing non-EFI platforms. |
506f1d07b x86: move the res... |
1877 |
|
291f36325 x86, efi: EFI boo... |
1878 |
config EFI_STUB |
8f24f8c2f efi/libstub: Anno... |
1879 1880 1881 1882 |
bool "EFI stub support" depends on EFI && !X86_USE_3DNOW depends on $(cc-option,-mabi=ms) || X86_32 select RELOCATABLE |
a7f7f6248 treewide: replace... |
1883 |
help |
8f24f8c2f efi/libstub: Anno... |
1884 |
This kernel feature allows a bzImage to be loaded directly |
291f36325 x86, efi: EFI boo... |
1885 |
by EFI firmware without the use of a bootloader. |
4f4cfa6c5 docs: admin-guide... |
1886 |
See Documentation/admin-guide/efi-stub.rst for more information. |
0c7596621 x86, efi: Add EFI... |
1887 |
|
7d453eee3 x86/efi: Wire up ... |
1888 1889 1890 |
config EFI_MIXED bool "EFI mixed-mode support" depends on EFI_STUB && X86_64 |
a7f7f6248 treewide: replace... |
1891 |
help |
7d453eee3 x86/efi: Wire up ... |
1892 1893 1894 1895 1896 1897 1898 1899 1900 |
Enabling this feature allows a 64-bit kernel to be booted on a 32-bit firmware, provided that your CPU supports 64-bit mode. Note that it is not possible to boot a mixed-mode enabled kernel via the EFI boot stub - a bootloader that supports the EFI handover protocol must be used. If unsure, say N. |
8636a1f96 treewide: surroun... |
1901 |
source "kernel/Kconfig.hz" |
506f1d07b x86: move the res... |
1902 1903 1904 |
config KEXEC bool "kexec system call" |
2965faa5e kexec: split kexe... |
1905 |
select KEXEC_CORE |
a7f7f6248 treewide: replace... |
1906 |
help |
506f1d07b x86: move the res... |
1907 1908 1909 1910 1911 1912 1913 1914 1915 |
kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot but it is independent of the system firmware. And like a reboot you can start any kernel with it, not just Linux. The name comes from the similarity to the exec system call. It is an ongoing process to be certain the hardware in a machine is properly shutdown, so do not be surprised if this code does not |
bf2206957 Kconfig: Remove h... |
1916 1917 1918 |
initially work for you. As of this writing the exact hardware interface is strongly in flux, so no good recommendation can be made. |
506f1d07b x86: move the res... |
1919 |
|
74ca317c2 kexec: create a n... |
1920 1921 |
config KEXEC_FILE bool "kexec file based system call" |
2965faa5e kexec: split kexe... |
1922 |
select KEXEC_CORE |
74ca317c2 kexec: create a n... |
1923 |
select BUILD_BIN2C |
74ca317c2 kexec: create a n... |
1924 1925 1926 |
depends on X86_64 depends on CRYPTO=y depends on CRYPTO_SHA256=y |
a7f7f6248 treewide: replace... |
1927 |
help |
74ca317c2 kexec: create a n... |
1928 1929 1930 1931 |
This is new version of kexec system call. This system call is file based and takes file descriptors as system call argument for kernel and initramfs as opposed to list of segments as accepted by previous system call. |
b799a09f6 kexec_file: make ... |
1932 1933 |
config ARCH_HAS_KEXEC_PURGATORY def_bool KEXEC_FILE |
99d5cadfd kexec_file: split... |
1934 |
config KEXEC_SIG |
8e7d83810 kexec: verify the... |
1935 |
bool "Verify kernel signature during kexec_file_load() syscall" |
74ca317c2 kexec: create a n... |
1936 |
depends on KEXEC_FILE |
a7f7f6248 treewide: replace... |
1937 |
help |
d8eb89404 x86/kexec: Cleanu... |
1938 |
|
99d5cadfd kexec_file: split... |
1939 1940 1941 1942 1943 1944 |
This option makes the kexec_file_load() syscall check for a valid signature of the kernel image. The image can still be loaded without a valid signature unless you also enable KEXEC_SIG_FORCE, though if there's a signature that we can check, then it must be valid. In addition to this option, you need to enable signature |
d8eb89404 x86/kexec: Cleanu... |
1945 1946 |
verification for the corresponding kernel image type being loaded in order for this to work. |
8e7d83810 kexec: verify the... |
1947 |
|
99d5cadfd kexec_file: split... |
1948 1949 1950 |
config KEXEC_SIG_FORCE bool "Require a valid signature in kexec_file_load() syscall" depends on KEXEC_SIG |
a7f7f6248 treewide: replace... |
1951 |
help |
99d5cadfd kexec_file: split... |
1952 1953 |
This option makes kernel signature verification mandatory for the kexec_file_load() syscall. |
8e7d83810 kexec: verify the... |
1954 1955 |
config KEXEC_BZIMAGE_VERIFY_SIG bool "Enable bzImage signature verification support" |
99d5cadfd kexec_file: split... |
1956 |
depends on KEXEC_SIG |
8e7d83810 kexec: verify the... |
1957 1958 |
depends on SIGNED_PE_FILE_VERIFICATION select SYSTEM_TRUSTED_KEYRING |
a7f7f6248 treewide: replace... |
1959 |
help |
8e7d83810 kexec: verify the... |
1960 |
Enable bzImage signature verification support. |
506f1d07b x86: move the res... |
1961 |
config CRASH_DUMP |
04b69447f arch/x86/Kconfig:... |
1962 |
bool "kernel crash dumps" |
506f1d07b x86: move the res... |
1963 |
depends on X86_64 || (X86_32 && HIGHMEM) |
a7f7f6248 treewide: replace... |
1964 |
help |
506f1d07b x86: move the res... |
1965 1966 1967 1968 1969 1970 1971 1972 |
Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or BIOS using PHYSICAL_START, or it must be built as a relocatable image (CONFIG_RELOCATABLE=y). |
330d48105 docs: admin-guide... |
1973 |
For more details see Documentation/admin-guide/kdump/kdump.rst |
506f1d07b x86: move the res... |
1974 |
|
3ab835213 kexec jump |
1975 |
config KEXEC_JUMP |
6ea303864 arch/x86: remove ... |
1976 |
bool "kexec jump" |
fee7b0d84 x86, kexec: x86_6... |
1977 |
depends on KEXEC && HIBERNATION |
a7f7f6248 treewide: replace... |
1978 |
help |
89081d17f kexec jump: save/... |
1979 1980 |
Jump between original kernel and kexeced kernel and invoke code in physical address mode via KEXEC |
3ab835213 kexec jump |
1981 |
|
506f1d07b x86: move the res... |
1982 |
config PHYSICAL_START |
6a108a14f kconfig: rename C... |
1983 |
hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) |
ceefccc93 x86: default CONF... |
1984 |
default "0x1000000" |
a7f7f6248 treewide: replace... |
1985 |
help |
506f1d07b x86: move the res... |
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 |
This gives the physical address where the kernel is loaded. If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then bzImage will decompress itself to above physical address and run from there. Otherwise, bzImage will run from the address where it has been loaded by the boot loader and will ignore above physical address. In normal kdump cases one does not have to set/change this option as now bzImage can be compiled as a completely relocatable image (CONFIG_RELOCATABLE=y) and be used to load and run from a different address. This option is mainly useful for the folks who don't want to use a bzImage for capturing the crash dump and want to use a vmlinux instead. vmlinux is not relocatable hence a kernel needs to be specifically compiled to run from a specific memory area (normally a reserved region) and this option comes handy. |
ceefccc93 x86: default CONF... |
2002 2003 2004 2005 2006 2007 2008 |
So if you are using bzImage for capturing the crash dump, leave the value here unchanged to 0x1000000 and set CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux for capturing the crash dump change this value to start of the reserved region. In other words, it can be set based on the "X" value as specified in the "crashkernel=YM@XM" command line boot parameter passed to the panic-ed |
330d48105 docs: admin-guide... |
2009 |
kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst |
ceefccc93 x86: default CONF... |
2010 |
for more details about crash dumps. |
506f1d07b x86: move the res... |
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 |
Usage of bzImage for capturing the crash dump is recommended as one does not have to build two kernels. Same kernel can be used as production kernel and capture kernel. Above option should have gone away after relocatable bzImage support is introduced. But it is present because there are users out there who continue to use vmlinux for dump capture. This option should go away down the line. Don't change this unless you know what you are doing. config RELOCATABLE |
26717808f x86: make CONFIG_... |
2023 2024 |
bool "Build a relocatable kernel" default y |
a7f7f6248 treewide: replace... |
2025 |
help |
506f1d07b x86: move the res... |
2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 |
This builds a kernel image that retains relocation information so it can be loaded someplace besides the default 1MB. The relocations tend to make the kernel binary about 10% larger, but are discarded at runtime. One use is for the kexec on panic case where the recovery kernel must live at a different physical address than the primary kernel. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address it has been loaded at and the compile time physical address |
8ab3820fd x86, kaslr: Retur... |
2037 |
(CONFIG_PHYSICAL_START) is used as the minimum location. |
506f1d07b x86: move the res... |
2038 |
|
8ab3820fd x86, kaslr: Retur... |
2039 |
config RANDOMIZE_BASE |
e8581e3d6 x86/KASLR: Drop C... |
2040 |
bool "Randomize the address of the kernel image (KASLR)" |
8ab3820fd x86, kaslr: Retur... |
2041 |
depends on RELOCATABLE |
6807c8465 x86: Enable KASLR... |
2042 |
default y |
a7f7f6248 treewide: replace... |
2043 |
help |
e8581e3d6 x86/KASLR: Drop C... |
2044 2045 2046 2047 2048 2049 |
In support of Kernel Address Space Layout Randomization (KASLR), this randomizes the physical address at which the kernel image is decompressed and the virtual address where the kernel image is mapped, as a security feature that deters exploit attempts relying on knowledge of the location of kernel code internals. |
ed9f007ee x86/KASLR: Extend... |
2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 |
On 64-bit, the kernel physical and virtual addresses are randomized separately. The physical address will be anywhere between 16MB and the top of physical memory (up to 64TB). The virtual address will be randomized from 16MB up to 1GB (9 bits of entropy). Note that this also reduces the memory space available to kernel modules from 1.5GB to 1GB. On 32-bit, the kernel physical and virtual addresses are randomized together. They will be randomized from 16MB up to 512MB (8 bits of entropy). |
e8581e3d6 x86/KASLR: Drop C... |
2060 2061 2062 2063 |
Entropy is generated using the RDRAND instruction if it is supported. If RDTSC is supported, its value is mixed into the entropy pool as well. If neither RDRAND nor RDTSC are |
ed9f007ee x86/KASLR: Extend... |
2064 2065 2066 2067 2068 2069 |
supported, then entropy is read from the i8254 timer. The usable entropy is limited by the kernel being built using 2GB addressing, and that PHYSICAL_ALIGN must be at a minimum of 2MB. As a result, only 10 bits of entropy are theoretically possible, but the implementations are further limited due to memory layouts. |
e8581e3d6 x86/KASLR: Drop C... |
2070 |
|
6807c8465 x86: Enable KASLR... |
2071 |
If unsure, say Y. |
8ab3820fd x86, kaslr: Retur... |
2072 2073 |
# Relocation on x86 needs some additional build support |
845adf726 x86: add a Kconfi... |
2074 2075 |
config X86_NEED_RELOCS def_bool y |
8ab3820fd x86, kaslr: Retur... |
2076 |
depends on RANDOMIZE_BASE || (X86_32 && RELOCATABLE) |
845adf726 x86: add a Kconfi... |
2077 |
|
506f1d07b x86: move the res... |
2078 |
config PHYSICAL_ALIGN |
a02150610 x86, relocs: Move... |
2079 |
hex "Alignment value to which kernel should be aligned" |
8ab3820fd x86, kaslr: Retur... |
2080 |
default "0x200000" |
a02150610 x86, relocs: Move... |
2081 2082 |
range 0x2000 0x1000000 if X86_32 range 0x200000 0x1000000 if X86_64 |
a7f7f6248 treewide: replace... |
2083 |
help |
506f1d07b x86: move the res... |
2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 |
This value puts the alignment restrictions on physical address where kernel is loaded and run from. Kernel is compiled for an address which meets above alignment restriction. If bootloader loads the kernel at a non-aligned address and CONFIG_RELOCATABLE is set, kernel will move itself to nearest address aligned to above value and run from there. If bootloader loads the kernel at a non-aligned address and CONFIG_RELOCATABLE is not set, kernel will ignore the run time load address and decompress itself to the address it has been compiled for and run from there. The address for which kernel is compiled already meets above alignment restrictions. Hence the end result is that kernel runs from a physical address meeting above alignment restrictions. |
a02150610 x86, relocs: Move... |
2099 2100 |
On 32-bit this value must be a multiple of 0x2000. On 64-bit this value must be a multiple of 0x200000. |
506f1d07b x86: move the res... |
2101 |
Don't change this unless you know what you are doing. |
eedb92abb x86/mm: Make virt... |
2102 2103 |
config DYNAMIC_MEMORY_LAYOUT bool |
a7f7f6248 treewide: replace... |
2104 |
help |
eedb92abb x86/mm: Make virt... |
2105 2106 |
This option makes base addresses of vmalloc and vmemmap as well as __PAGE_OFFSET movable during boot. |
0483e1fa6 x86/mm: Implement... |
2107 2108 2109 2110 |
config RANDOMIZE_MEMORY bool "Randomize the kernel memory sections" depends on X86_64 depends on RANDOMIZE_BASE |
eedb92abb x86/mm: Make virt... |
2111 |
select DYNAMIC_MEMORY_LAYOUT |
0483e1fa6 x86/mm: Implement... |
2112 |
default RANDOMIZE_BASE |
a7f7f6248 treewide: replace... |
2113 |
help |
0483e1fa6 x86/mm: Implement... |
2114 2115 2116 2117 2118 2119 2120 2121 |
Randomizes the base virtual address of kernel memory sections (physical memory mapping, vmalloc & vmemmap). This security feature makes exploits relying on predictable memory locations less reliable. The order of allocations remains unchanged. Entropy is generated in the same way as RANDOMIZE_BASE. Current implementation in the optimal configuration have in average 30,000 different possible virtual addresses for each memory section. |
6807c8465 x86: Enable KASLR... |
2122 |
If unsure, say Y. |
0483e1fa6 x86/mm: Implement... |
2123 |
|
90397a417 x86/mm: Add memor... |
2124 2125 2126 2127 2128 2129 2130 |
config RANDOMIZE_MEMORY_PHYSICAL_PADDING hex "Physical memory mapping padding" if EXPERT depends on RANDOMIZE_MEMORY default "0xa" if MEMORY_HOTPLUG default "0x0" range 0x1 0x40 if MEMORY_HOTPLUG range 0x0 0x40 |
a7f7f6248 treewide: replace... |
2131 |
help |
90397a417 x86/mm: Add memor... |
2132 2133 2134 2135 2136 2137 |
Define the padding in terabytes added to the existing physical memory size during kernel memory randomization. It is useful for memory hotplug support but reduces the entropy available for address randomization. If unsure, leave at the default value. |
506f1d07b x86: move the res... |
2138 |
config HOTPLUG_CPU |
bebd024e4 x86/smp: Enforce ... |
2139 |
def_bool y |
40b313608 Finally eradicate... |
2140 |
depends on SMP |
506f1d07b x86: move the res... |
2141 |
|
80aa1dff6 x86, Kconfig: Add... |
2142 2143 |
config BOOTPARAM_HOTPLUG_CPU0 bool "Set default setting of cpu0_hotpluggable" |
2c922cd07 x86/cpu/hotplug: ... |
2144 |
depends on HOTPLUG_CPU |
a7f7f6248 treewide: replace... |
2145 |
help |
80aa1dff6 x86, Kconfig: Add... |
2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 |
Set whether default state of cpu0_hotpluggable is on or off. Say Y here to enable CPU0 hotplug by default. If this switch is turned on, there is no need to give cpu0_hotplug kernel parameter and the CPU0 hotplug feature is enabled by default. Please note: there are two known CPU0 dependencies if you want to enable the CPU0 hotplug feature either by this switch or by cpu0_hotplug kernel parameter. First, resume from hibernate or suspend always starts from CPU0. So hibernate and suspend are prevented if CPU0 is offline. Second dependency is PIC interrupts always go to CPU0. CPU0 can not offline if any interrupt can not migrate out of CPU0. There may be other CPU0 dependencies. Please make sure the dependencies are under your control before you enable this feature. Say N if you don't want to enable CPU0 hotplug feature by default. You still can enable the CPU0 hotplug feature at boot by kernel parameter cpu0_hotplug. |
a71c8bc5d x86, topology: De... |
2169 2170 2171 |
config DEBUG_HOTPLUG_CPU0 def_bool n prompt "Debug CPU0 hotplug" |
2c922cd07 x86/cpu/hotplug: ... |
2172 |
depends on HOTPLUG_CPU |
a7f7f6248 treewide: replace... |
2173 |
help |
a71c8bc5d x86, topology: De... |
2174 2175 2176 2177 2178 2179 2180 2181 2182 |
Enabling this option offlines CPU0 (if CPU0 can be offlined) as soon as possible and boots up userspace with CPU0 offlined. User can online CPU0 back after boot time. To debug CPU0 hotplug, you need to enable CPU0 offline/online feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during compilation or giving cpu0_hotplug kernel parameter at boot. If unsure, say N. |
506f1d07b x86: move the res... |
2183 |
config COMPAT_VDSO |
b0b49f267 x86, vdso: Remove... |
2184 2185 |
def_bool n prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)" |
953fee1d8 x86/kconfig: Clea... |
2186 |
depends on COMPAT_32 |
a7f7f6248 treewide: replace... |
2187 |
help |
b0b49f267 x86, vdso: Remove... |
2188 2189 2190 |
Certain buggy versions of glibc will crash if they are presented with a 32-bit vDSO that is not mapped at the address indicated in its segment table. |
e84446de5 x86 VSDO: Fix Kco... |
2191 |
|
b0b49f267 x86, vdso: Remove... |
2192 2193 2194 2195 2196 |
The bug was introduced by f866314b89d56845f55e6f365e18b31ec978ec3a and fixed by 3b3ddb4f7db98ec9e912ccdf54d35df4aa30e04a and 49ad572a70b8aeb91e57483a11dd1b77e31c4468. Glibc 2.3.3 is the only released version with the bug, but OpenSUSE 9 contains a buggy "glibc 2.3.2". |
506f1d07b x86: move the res... |
2197 |
|
b0b49f267 x86, vdso: Remove... |
2198 2199 2200 2201 2202 2203 2204 2205 2206 |
The symptom of the bug is that everything crashes on startup, saying: dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed! Saying Y here changes the default value of the vdso32 boot option from 1 to 0, which turns off the 32-bit vDSO entirely. This works around the glibc bug but hurts performance. If unsure, say N: if you are compiling your own kernel, you are unlikely to be using a buggy version of glibc. |
506f1d07b x86: move the res... |
2207 |
|
3dc33bd30 x86/entry/vsyscal... |
2208 2209 2210 |
choice prompt "vsyscall table for legacy applications" depends on X86_64 |
625b7b7f7 x86/vsyscall: Cha... |
2211 |
default LEGACY_VSYSCALL_XONLY |
3dc33bd30 x86/entry/vsyscal... |
2212 2213 2214 2215 2216 2217 2218 |
help Legacy user code that does not know how to find the vDSO expects to be able to issue three syscalls by calling fixed addresses in kernel space. Since this location is not randomized with ASLR, it can be used to assist security vulnerability exploitation. This setting can be changed at boot time via the kernel command |
bd49e16e3 x86/vsyscall: Add... |
2219 |
line parameter vsyscall=[emulate|xonly|none]. |
3dc33bd30 x86/entry/vsyscal... |
2220 2221 2222 2223 |
On a system with recent enough glibc (2.14 or newer) and no static binaries, you can say None without a performance penalty to improve security. |
bd49e16e3 x86/vsyscall: Add... |
2224 |
If unsure, select "Emulate execution only". |
3dc33bd30 x86/entry/vsyscal... |
2225 |
|
3dc33bd30 x86/entry/vsyscal... |
2226 |
config LEGACY_VSYSCALL_EMULATE |
bd49e16e3 x86/vsyscall: Add... |
2227 |
bool "Full emulation" |
3dc33bd30 x86/entry/vsyscal... |
2228 |
help |
bd49e16e3 x86/vsyscall: Add... |
2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 |
The kernel traps and emulates calls into the fixed vsyscall address mapping. This makes the mapping non-executable, but it still contains readable known contents, which could be used in certain rare security vulnerability exploits. This configuration is recommended when using legacy userspace that still uses vsyscalls along with legacy binary instrumentation tools that require code to be readable. An example of this type of legacy userspace is running Pin on an old binary that still uses vsyscalls. config LEGACY_VSYSCALL_XONLY bool "Emulate execution only" help The kernel traps and emulates calls into the fixed vsyscall address mapping and does not allow reads. This configuration is recommended when userspace might use the legacy vsyscall area but support for legacy binary instrumentation of legacy code is not needed. It mitigates certain uses of the vsyscall area as an ASLR-bypassing buffer. |
3dc33bd30 x86/entry/vsyscal... |
2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 |
config LEGACY_VSYSCALL_NONE bool "None" help There will be no vsyscall mapping at all. This will eliminate any risk of ASLR bypass due to the vsyscall fixed address mapping. Attempts to use the vsyscalls will be reported to dmesg, so that either old or malicious userspace programs can be identified. endchoice |
516cbf373 x86, bootup: add ... |
2261 2262 |
config CMDLINE_BOOL bool "Built-in kernel command line" |
a7f7f6248 treewide: replace... |
2263 |
help |
516cbf373 x86, bootup: add ... |
2264 2265 2266 2267 2268 2269 2270 2271 |
Allow for specifying boot arguments to the kernel at build time. On some systems (e.g. embedded ones), it is necessary or convenient to provide some or all of the kernel boot arguments with the kernel itself (that is, to not rely on the boot loader to provide them.) To compile command line arguments into the kernel, set this option to 'Y', then fill in the |
69711ca19 x86/kconfig: Fix ... |
2272 |
boot arguments in CONFIG_CMDLINE. |
516cbf373 x86, bootup: add ... |
2273 2274 2275 2276 2277 2278 2279 2280 |
Systems with fully functional boot loaders (i.e. non-embedded) should leave this option set to 'N'. config CMDLINE string "Built-in kernel command string" depends on CMDLINE_BOOL default "" |
a7f7f6248 treewide: replace... |
2281 |
help |
516cbf373 x86, bootup: add ... |
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 |
Enter arguments here that should be compiled into the kernel image and used at boot time. If the boot loader provides a command line at boot time, it is appended to this string to form the full kernel command line, when the system boots. However, you can use the CONFIG_CMDLINE_OVERRIDE option to change this behavior. In most cases, the command line (whether built-in or provided by the boot loader) should specify the device for the root file system. config CMDLINE_OVERRIDE bool "Built-in command line overrides boot loader arguments" |
645e64662 x86/Kconfig: Make... |
2296 |
depends on CMDLINE_BOOL && CMDLINE != "" |
a7f7f6248 treewide: replace... |
2297 |
help |
516cbf373 x86, bootup: add ... |
2298 2299 2300 2301 2302 |
Set this option to 'Y' to have the kernel ignore the boot loader command line, and use ONLY the built-in command line. This is used to work around broken boot loaders. This should be set to 'N' under normal conditions. |
a5b9e5a2f x86/ldt: Make mod... |
2303 2304 2305 |
config MODIFY_LDT_SYSCALL bool "Enable the LDT (local descriptor table)" if EXPERT default y |
a7f7f6248 treewide: replace... |
2306 |
help |
a5b9e5a2f x86/ldt: Make mod... |
2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 |
Linux can allow user programs to install a per-process x86 Local Descriptor Table (LDT) using the modify_ldt(2) system call. This is required to run 16-bit or segmented code such as DOSEMU or some Wine programs. It is also used by some very old threading libraries. Enabling this feature adds a small amount of overhead to context switches and increases the low-level kernel attack surface. Disabling it removes the modify_ldt(2) system call. Saying 'N' here may make sense for embedded or server kernels. |
b700e7f03 livepatch: kernel... |
2318 |
source "kernel/livepatch/Kconfig" |
506f1d07b x86: move the res... |
2319 |
endmenu |
3072e413e mm/memory_hotplug... |
2320 2321 2322 |
config ARCH_HAS_ADD_PAGES def_bool y depends on X86_64 && ARCH_ENABLE_MEMORY_HOTPLUG |
506f1d07b x86: move the res... |
2323 2324 2325 |
config ARCH_ENABLE_MEMORY_HOTPLUG def_bool y depends on X86_64 || (X86_32 && HIGHMEM) |
355510533 x86: add memory h... |
2326 2327 2328 |
config ARCH_ENABLE_MEMORY_HOTREMOVE def_bool y depends on MEMORY_HOTPLUG |
e534c7c5f numa: x86_64: use... |
2329 |
config USE_PERCPU_NUMA_NODE_ID |
645a79195 x86: Unify CPU ->... |
2330 |
def_bool y |
e534c7c5f numa: x86_64: use... |
2331 |
depends on NUMA |
9491846fc x86, mm: enable s... |
2332 2333 2334 |
config ARCH_ENABLE_SPLIT_PMD_PTLOCK def_bool y depends on X86_64 || X86_PAE |
c177c81e0 hugetlb: restrict... |
2335 2336 2337 |
config ARCH_ENABLE_HUGEPAGE_MIGRATION def_bool y depends on X86_64 && HUGETLB_PAGE && MIGRATION |
9c670ea37 mm: thp: introduc... |
2338 2339 2340 |
config ARCH_ENABLE_THP_MIGRATION def_bool y depends on X86_64 && TRANSPARENT_HUGEPAGE |
da85f865b x86: mention ACPI... |
2341 |
menu "Power management and ACPI options" |
e279b6c1d x86: start unific... |
2342 2343 |
config ARCH_HIBERNATION_HEADER |
3c2362e62 x86: use def_bool... |
2344 |
def_bool y |
445565303 x86-32, hibernate... |
2345 |
depends on HIBERNATION |
e279b6c1d x86: start unific... |
2346 2347 2348 2349 |
source "kernel/power/Kconfig" source "drivers/acpi/Kconfig" |
efafc8b21 x86: add arch-spe... |
2350 |
source "drivers/sfi/Kconfig" |
a6b68076f x86: compile apm ... |
2351 |
config X86_APM_BOOT |
6fc108a08 x86: Clean up arc... |
2352 |
def_bool y |
282e5aaba x86: Kconfig: dro... |
2353 |
depends on APM |
a6b68076f x86: compile apm ... |
2354 |
|
e279b6c1d x86: start unific... |
2355 2356 |
menuconfig APM tristate "APM (Advanced Power Management) BIOS support" |
efefa6f63 x86, VisWS: turn ... |
2357 |
depends on X86_32 && PM_SLEEP |
a7f7f6248 treewide: replace... |
2358 |
help |
e279b6c1d x86: start unific... |
2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 |
APM is a BIOS specification for saving power using several different techniques. This is mostly useful for battery powered laptops with APM compliant BIOSes. If you say Y here, the system time will be reset after a RESUME operation, the /proc/apm device will provide battery status information, and user-space programs will receive notification of APM "events" (e.g. battery status change). If you select "Y" here, you can disable actual use of the APM BIOS by passing the "apm=off" option to the kernel at boot time. Note that the APM support is almost completely disabled for machines with more than one CPU. In order to use APM, you will need supporting software. For location |
151f4e2bd docs: power: conv... |
2373 |
and more information, read <file:Documentation/power/apm-acpi.rst> |
2dc98fd32 doc: Konfig: Docu... |
2374 |
and the Battery Powered Linux mini-HOWTO, available from |
e279b6c1d x86: start unific... |
2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 |
<http://www.tldp.org/docs.html#howto>. This driver does not spin down disk drives (see the hdparm(8) manpage ("man 8 hdparm") for that), and it doesn't turn off VESA-compliant "green" monitors. This driver does not support the TI 4000M TravelMate and the ACER 486/DX4/75 because they don't have compliant BIOSes. Many "green" desktop machines also don't have compliant BIOSes, and this driver may cause those machines to panic during the boot phase. Generally, if you don't have a battery in your machine, there isn't much point in using this driver and you should say N. If you get random kernel OOPSes or reboots that don't seem to be related to anything, try disabling/enabling this option (or disabling/enabling APM in your BIOS). Some other things you should try when experiencing seemingly random, "weird" problems: 1) make sure that you have enough swap space and that it is enabled. 2) pass the "no-hlt" option to the kernel 3) switch on floating point emulation in the kernel and pass the "no387" option to the kernel 4) pass the "floppy=nodma" option to the kernel 5) pass the "mem=4M" option to the kernel (thereby disabling all but the first 4 MB of RAM) 6) make sure that the CPU is not over clocked. 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> 8) disable the cache from your BIOS settings 9) install a fan for the video card or exchange video RAM 10) install a better fan for the CPU 11) exchange RAM chips 12) exchange the motherboard. To compile this driver as a module, choose M here: the module will be called apm. if APM config APM_IGNORE_USER_SUSPEND bool "Ignore USER SUSPEND" |
a7f7f6248 treewide: replace... |
2418 |
help |
e279b6c1d x86: start unific... |
2419 2420 2421 2422 2423 2424 |
This option will ignore USER SUSPEND requests. On machines with a compliant APM BIOS, you want to say N. However, on the NEC Versa M series notebooks, it is necessary to say Y because of a BIOS bug. config APM_DO_ENABLE bool "Enable PM at boot time" |
a7f7f6248 treewide: replace... |
2425 |
help |
e279b6c1d x86: start unific... |
2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 |
Enable APM features at boot time. From page 36 of the APM BIOS specification: "When disabled, the APM BIOS does not automatically power manage devices, enter the Standby State, enter the Suspend State, or take power saving steps in response to CPU Idle calls." This driver will make CPU Idle calls when Linux is idle (unless this feature is turned off -- see "Do CPU IDLE calls", below). This should always save battery power, but more complicated APM features will be dependent on your BIOS implementation. You may need to turn this option off if your computer hangs at boot time when using APM support, or if it beeps continuously instead of suspending. Turn this off if you have a NEC UltraLite Versa 33/C or a Toshiba T400CDT. This is off by default since most machines do fine without this feature. config APM_CPU_IDLE |
dd8af0762 APM idle: registe... |
2441 |
depends on CPU_IDLE |
e279b6c1d x86: start unific... |
2442 |
bool "Make CPU Idle calls when idle" |
a7f7f6248 treewide: replace... |
2443 |
help |
e279b6c1d x86: start unific... |
2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 |
Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. On some machines, this can activate improved power savings, such as a slowed CPU clock rate, when the machine is idle. These idle calls are made after the idle loop has run for some length of time (e.g., 333 mS). On some machines, this will cause a hang at boot time or whenever the CPU becomes idle. (On machines with more than one CPU, this option does nothing.) config APM_DISPLAY_BLANK bool "Enable console blanking using APM" |
a7f7f6248 treewide: replace... |
2454 |
help |
e279b6c1d x86: start unific... |
2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 |
Enable console blanking using the APM. Some laptops can use this to turn off the LCD backlight when the screen blanker of the Linux virtual console blanks the screen. Note that this is only used by the virtual console screen blanker, and won't turn off the backlight when using the X Window system. This also doesn't have anything to do with your VESA-compliant power-saving monitor. Further, this option doesn't work for all laptops -- it might not turn off your backlight at all, or it might print a lot of errors to the console, especially if you are using gpm. config APM_ALLOW_INTS bool "Allow interrupts during APM BIOS calls" |
a7f7f6248 treewide: replace... |
2467 |
help |
e279b6c1d x86: start unific... |
2468 2469 2470 2471 2472 2473 |
Normally we disable external interrupts while we are making calls to the APM BIOS as a measure to lessen the effects of a badly behaving BIOS implementation. The BIOS should reenable interrupts if it needs to. Unfortunately, some BIOSes do not -- especially those in many of the newer IBM Thinkpads. If you experience hangs when you suspend, try setting this to Y. Otherwise, say N. |
e279b6c1d x86: start unific... |
2474 |
endif # APM |
bb0a56ecc [CPUFREQ] Move x8... |
2475 |
source "drivers/cpufreq/Kconfig" |
e279b6c1d x86: start unific... |
2476 2477 |
source "drivers/cpuidle/Kconfig" |
27471fdb3 i7300_idle driver... |
2478 |
source "drivers/idle/Kconfig" |
e279b6c1d x86: start unific... |
2479 2480 2481 2482 |
endmenu menu "Bus options (PCI etc.)" |
e279b6c1d x86: start unific... |
2483 2484 |
choice prompt "PCI access mode" |
efefa6f63 x86, VisWS: turn ... |
2485 |
depends on X86_32 && PCI |
e279b6c1d x86: start unific... |
2486 |
default PCI_GOANY |
a7f7f6248 treewide: replace... |
2487 |
help |
e279b6c1d x86: start unific... |
2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 |
On PCI systems, the BIOS can be used to detect the PCI devices and determine their configuration. However, some old PCI motherboards have BIOS bugs and may crash if this is done. Also, some embedded PCI-based systems don't have any BIOS at all. Linux can also try to detect the PCI hardware directly without using the BIOS. With this option, you can specify how Linux should detect the PCI devices. If you choose "BIOS", the BIOS will be used, if you choose "Direct", the BIOS won't be used, and if you choose "MMConfig", then PCI Express MMCONFIG will be used. If you choose "Any", the kernel will try MMCONFIG, then the direct access method and falls back to the BIOS if that doesn't work. If unsure, go with the default, which is "Any". config PCI_GOBIOS bool "BIOS" config PCI_GOMMCONFIG bool "MMConfig" config PCI_GODIRECT bool "Direct" |
3ef0e1f8c x86: olpc: add On... |
2510 |
config PCI_GOOLPC |
76fb65701 x86, olpc: Only e... |
2511 |
bool "OLPC XO-1" |
3ef0e1f8c x86: olpc: add On... |
2512 |
depends on OLPC |
2bdd1b031 PCI/x86: fix up P... |
2513 2514 |
config PCI_GOANY bool "Any" |
e279b6c1d x86: start unific... |
2515 2516 2517 |
endchoice config PCI_BIOS |
3c2362e62 x86: use def_bool... |
2518 |
def_bool y |
efefa6f63 x86, VisWS: turn ... |
2519 |
depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY) |
e279b6c1d x86: start unific... |
2520 2521 2522 |
# x86-64 doesn't support PCI BIOS access from long mode so always go direct. config PCI_DIRECT |
3c2362e62 x86: use def_bool... |
2523 |
def_bool y |
0aba496fc x86/PCI: select d... |
2524 |
depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG)) |
e279b6c1d x86: start unific... |
2525 2526 |
config PCI_MMCONFIG |
b45c9f365 x86: Consolidate ... |
2527 2528 |
bool "Support mmconfig PCI config space access" if X86_64 default y |
8364e1f83 x86/jailhouse: Al... |
2529 |
depends on PCI && (ACPI || SFI || JAILHOUSE_GUEST) |
b45c9f365 x86: Consolidate ... |
2530 |
depends on X86_64 || (PCI_GOANY || PCI_GOMMCONFIG) |
e279b6c1d x86: start unific... |
2531 |
|
3ef0e1f8c x86: olpc: add On... |
2532 |
config PCI_OLPC |
2bdd1b031 PCI/x86: fix up P... |
2533 2534 |
def_bool y depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY) |
3ef0e1f8c x86: olpc: add On... |
2535 |
|
b5401a96b xen/x86/PCI: Add ... |
2536 2537 2538 2539 |
config PCI_XEN def_bool y depends on PCI && XEN select SWIOTLB_XEN |
8364e1f83 x86/jailhouse: Al... |
2540 2541 2542 |
config MMCONF_FAM10H def_bool y depends on X86_64 && PCI_MMCONFIG && ACPI |
e279b6c1d x86: start unific... |
2543 |
|
3f6ea84a3 PCI: read memory ... |
2544 |
config PCI_CNB20LE_QUIRK |
6a108a14f kconfig: rename C... |
2545 |
bool "Read CNB20LE Host Bridge Windows" if EXPERT |
6ea303864 arch/x86: remove ... |
2546 |
depends on PCI |
3f6ea84a3 PCI: read memory ... |
2547 2548 2549 2550 |
help Read the PCI windows out of the CNB20LE host bridge. This allows PCI hotplug to work on systems with the CNB20LE chipset which do not have ACPI. |
64a5fed66 x86/PCI: make Bro... |
2551 2552 2553 2554 |
There's no public spec for this chipset, and this functionality is known to be incomplete. You should say N unless you know you need this. |
3a4955111 isa: Allow ISA-st... |
2555 |
config ISA_BUS |
17a2a129b isa: Remove ISA_B... |
2556 |
bool "ISA bus support on modern systems" if EXPERT |
3a4955111 isa: Allow ISA-st... |
2557 |
help |
17a2a129b isa: Remove ISA_B... |
2558 2559 2560 2561 2562 |
Expose ISA bus device drivers and options available for selection and configuration. Enable this option if your target machine has an ISA bus. ISA is an older system, displaced by PCI and newer bus architectures -- if your target machine is modern, it probably does not have an ISA bus. |
3a4955111 isa: Allow ISA-st... |
2563 2564 |
If unsure, say N. |
1c00f0161 x86: allow CONFIG... |
2565 |
# x86_64 have no ISA slots, but can have ISA-style DMA. |
e279b6c1d x86: start unific... |
2566 |
config ISA_DMA_API |
1c00f0161 x86: allow CONFIG... |
2567 2568 2569 2570 2571 |
bool "ISA-style DMA support" if (X86_64 && EXPERT) default y help Enables ISA-style DMA support for devices requiring such controllers. If unsure, say Y. |
e279b6c1d x86: start unific... |
2572 |
|
51e68d055 x86 isa: add back... |
2573 |
if X86_32 |
e279b6c1d x86: start unific... |
2574 2575 |
config ISA bool "ISA support" |
a7f7f6248 treewide: replace... |
2576 |
help |
e279b6c1d x86: start unific... |
2577 2578 2579 2580 2581 |
Find out whether you have ISA slots on your motherboard. ISA is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are PCI, EISA, MicroChannel (MCA) or VESA. ISA is an older system, now being displaced by PCI; newer boards don't support it. If you have ISA, say Y, otherwise N. |
e279b6c1d x86: start unific... |
2582 2583 |
config SCx200 tristate "NatSemi SCx200 support" |
a7f7f6248 treewide: replace... |
2584 |
help |
e279b6c1d x86: start unific... |
2585 2586 2587 2588 2589 2590 2591 2592 2593 |
This provides basic support for National Semiconductor's (now AMD's) Geode processors. The driver probes for the PCI-IDs of several on-chip devices, so its a good dependency for other scx200_* drivers. If compiled as a module, the driver is named scx200. config SCx200HR_TIMER tristate "NatSemi SCx200 27MHz High-Resolution Timer Support" |
592913ecb time: Kill off CO... |
2594 |
depends on SCx200 |
e279b6c1d x86: start unific... |
2595 |
default y |
a7f7f6248 treewide: replace... |
2596 |
help |
e279b6c1d x86: start unific... |
2597 2598 2599 2600 2601 |
This driver provides a clocksource built upon the on-chip 27MHz high-resolution timer. Its also a workaround for NSC Geode SC-1100's buggy TSC, which loses time when the processor goes idle (as is done by the scheduler). The other workaround is idle=poll boot option. |
3ef0e1f8c x86: olpc: add On... |
2602 2603 |
config OLPC bool "One Laptop Per Child support" |
540089798 x86: OLPC: Remove... |
2604 |
depends on !X86_PAE |
3c5549467 ALSA: cs5535audio... |
2605 |
select GPIOLIB |
dc3119e70 x86: OLPC: Cleanu... |
2606 |
select OF |
45bb1674b x86, olpc: Use de... |
2607 |
select OF_PROMTREE |
b4e518547 irq_domain/x86: C... |
2608 |
select IRQ_DOMAIN |
0c3d931b3 Platform: OLPC: A... |
2609 |
select OLPC_EC |
a7f7f6248 treewide: replace... |
2610 |
help |
3ef0e1f8c x86: olpc: add On... |
2611 2612 |
Add support for detecting the unique features of the OLPC XO hardware. |
a3128588b x86, olpc: Rename... |
2613 2614 |
config OLPC_XO1_PM bool "OLPC XO-1 Power Management" |
fa112cf1e x86/olpc: Fix bui... |
2615 |
depends on OLPC && MFD_CS5535=y && PM_SLEEP |
a7f7f6248 treewide: replace... |
2616 |
help |
97c4cb71c x86, olpc: Add XO... |
2617 |
Add support for poweroff and suspend of the OLPC XO-1 laptop. |
bf1ebf007 x86, olpc: Add XO... |
2618 |
|
cfee95977 x86, olpc: Add XO... |
2619 2620 2621 |
config OLPC_XO1_RTC bool "OLPC XO-1 Real Time Clock" depends on OLPC_XO1_PM && RTC_DRV_CMOS |
a7f7f6248 treewide: replace... |
2622 |
help |
cfee95977 x86, olpc: Add XO... |
2623 2624 |
Add support for the XO-1 real time clock, which can be used as a programmable wakeup source. |
7feda8e9f x86, olpc: Add XO... |
2625 2626 |
config OLPC_XO1_SCI bool "OLPC XO-1 SCI extras" |
92e830f25 x86/olpc: Fix inc... |
2627 |
depends on OLPC && OLPC_XO1_PM && GPIO_CS5535=y |
ed8e47fef x86/olpc: Fix olp... |
2628 |
depends on INPUT=y |
d8d01a637 x86, olpc: Fix de... |
2629 |
select POWER_SUPPLY |
a7f7f6248 treewide: replace... |
2630 |
help |
7feda8e9f x86, olpc: Add XO... |
2631 |
Add support for SCI-based features of the OLPC XO-1 laptop: |
7bc74b3df x86, olpc-xo1-sci... |
2632 |
- EC-driven system wakeups |
7feda8e9f x86, olpc: Add XO... |
2633 |
- Power button |
7bc74b3df x86, olpc-xo1-sci... |
2634 |
- Ebook switch |
2cf2baea1 x86, olpc-xo1-sci... |
2635 |
- Lid switch |
e1040ac69 x86, olpc-xo1-sci... |
2636 2637 |
- AC adapter status updates - Battery status updates |
7feda8e9f x86, olpc: Add XO... |
2638 |
|
a0f30f592 x86, olpc: Add XO... |
2639 2640 |
config OLPC_XO15_SCI bool "OLPC XO-1.5 SCI extras" |
d8d01a637 x86, olpc: Fix de... |
2641 2642 |
depends on OLPC && ACPI select POWER_SUPPLY |
a7f7f6248 treewide: replace... |
2643 |
help |
a0f30f592 x86, olpc: Add XO... |
2644 2645 2646 2647 |
Add support for SCI-based features of the OLPC XO-1.5 laptop: - EC-driven system wakeups - AC adapter status updates - Battery status updates |
bf1ebf007 x86, olpc: Add XO... |
2648 |
|
d4f3e3501 x86: geode: New P... |
2649 2650 2651 |
config ALIX bool "PCEngines ALIX System Support (LED setup)" select GPIOLIB |
a7f7f6248 treewide: replace... |
2652 |
help |
d4f3e3501 x86: geode: New P... |
2653 2654 2655 2656 2657 2658 2659 2660 2661 |
This option enables system support for the PCEngines ALIX. At present this just sets up LEDs for GPIO control on ALIX2/3/6 boards. However, other system specific setup should get added here. Note: You must still enable the drivers for GPIO and LED support (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs Note: You have to set alix.force=1 for boards with Award BIOS. |
da4e33029 x86/geode/net5501... |
2662 2663 2664 |
config NET5501 bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)" select GPIOLIB |
a7f7f6248 treewide: replace... |
2665 |
help |
da4e33029 x86/geode/net5501... |
2666 |
This option enables system support for the Soekris Engineering net5501. |
3197059af geos: Platform dr... |
2667 2668 2669 2670 |
config GEOS bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)" select GPIOLIB depends on DMI |
a7f7f6248 treewide: replace... |
2671 |
help |
3197059af geos: Platform dr... |
2672 |
This option enables system support for the Traverse Technologies GEOS. |
7d0291256 x86: Add TS-5500 ... |
2673 2674 2675 2676 2677 2678 |
config TS5500 bool "Technologic Systems TS-5500 platform support" depends on MELAN select CHECK_SIGNATURE select NEW_LEDS select LEDS_CLASS |
a7f7f6248 treewide: replace... |
2679 |
help |
7d0291256 x86: Add TS-5500 ... |
2680 |
This option enables system support for the Technologic Systems TS-5500. |
bc0120fdb x86: copy x86_64 ... |
2681 |
endif # X86_32 |
23ac4ae82 x86, k8: Rename k... |
2682 |
config AMD_NB |
e279b6c1d x86: start unific... |
2683 |
def_bool y |
0e152cd7c x86, k8 nb: Fix b... |
2684 |
depends on CPU_SUP_AMD && PCI |
e279b6c1d x86: start unific... |
2685 |
|
e3263ab38 x86: provide plat... |
2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 |
config X86_SYSFB bool "Mark VGA/VBE/EFI FB as generic system framebuffer" help Firmwares often provide initial graphics framebuffers so the BIOS, bootloader or kernel can show basic video-output during boot for user-guidance and debugging. Historically, x86 used the VESA BIOS Extensions and EFI-framebuffers for this, which are mostly limited to x86. This option, if enabled, marks VGA/VBE/EFI framebuffers as generic framebuffers so the new generic system-framebuffer drivers can be used on x86. If the framebuffer is not compatible with the generic |
e3a5dc087 x86/Kconfig: Fix ... |
2697 |
modes, it is advertised as fallback platform framebuffer so legacy |
e3263ab38 x86: provide plat... |
2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 |
drivers like efifb, vesafb and uvesafb can pick it up. If this option is not selected, all system framebuffers are always marked as fallback platform framebuffers as usual. Note: Legacy fbdev drivers, including vesafb, efifb, uvesafb, will not be able to pick up generic system framebuffers if this option is selected. You are highly encouraged to enable simplefb as replacement if you select this option. simplefb can correctly deal with generic system framebuffers. But you should still keep vesafb and others enabled as fallback if a system framebuffer is incompatible with simplefb. If unsure, say Y. |
e279b6c1d x86: start unific... |
2711 |
endmenu |
1572497cb kconfig: include ... |
2712 |
menu "Binary Emulations" |
e279b6c1d x86: start unific... |
2713 2714 2715 2716 |
config IA32_EMULATION bool "IA32 Emulation" depends on X86_64 |
39f88911b x86/kconfig: Clea... |
2717 |
select ARCH_WANT_OLD_COMPAT_IPC |
d1603990e x86: fix build er... |
2718 |
select BINFMT_ELF |
a97f52e67 x86: compat_binfm... |
2719 |
select COMPAT_BINFMT_ELF |
39f88911b x86/kconfig: Clea... |
2720 |
select COMPAT_OLD_SIGACTION |
a7f7f6248 treewide: replace... |
2721 |
help |
5fd92e65a x32: Allow x32 to... |
2722 2723 2724 |
Include code to run legacy 32-bit programs under a 64-bit kernel. You should likely turn this on, unless you're 100% sure that you don't have any 32-bit programs left. |
e279b6c1d x86: start unific... |
2725 2726 |
config IA32_AOUT |
8f9ca475c x86: clean up arc... |
2727 2728 |
tristate "IA32 a.out support" depends on IA32_EMULATION |
eac616557 x86: Deprecate a.... |
2729 |
depends on BROKEN |
a7f7f6248 treewide: replace... |
2730 |
help |
8f9ca475c x86: clean up arc... |
2731 |
Support old a.out binaries in the 32bit emulation. |
e279b6c1d x86: start unific... |
2732 |
|
0bf627639 x32: Warn and dis... |
2733 |
config X86_X32 |
6ea303864 arch/x86: remove ... |
2734 |
bool "x32 ABI for 64-bit mode" |
9b54050bf x86/compat: Separ... |
2735 |
depends on X86_64 |
a7f7f6248 treewide: replace... |
2736 |
help |
5fd92e65a x32: Allow x32 to... |
2737 2738 2739 2740 2741 2742 2743 2744 |
Include code to run binaries for the x32 native 32-bit ABI for 64-bit processors. An x32 process gets access to the full 64-bit register file and wide data path while leaving pointers at 32 bits for smaller memory footprint. You will need a recent binutils (2.22 or later) with elf32_x86_64 support enabled to compile a kernel with this option set. |
953fee1d8 x86/kconfig: Clea... |
2745 2746 2747 2748 2749 |
config COMPAT_32 def_bool y depends on IA32_EMULATION || X86_32 select HAVE_UID16 select OLD_SIGSUSPEND3 |
e279b6c1d x86: start unific... |
2750 |
config COMPAT |
3c2362e62 x86: use def_bool... |
2751 |
def_bool y |
0bf627639 x32: Warn and dis... |
2752 |
depends on IA32_EMULATION || X86_X32 |
e279b6c1d x86: start unific... |
2753 |
|
3120e25ef x86/Kconfig: Clea... |
2754 |
if COMPAT |
e279b6c1d x86: start unific... |
2755 |
config COMPAT_FOR_U64_ALIGNMENT |
3120e25ef x86/Kconfig: Clea... |
2756 |
def_bool y |
e279b6c1d x86: start unific... |
2757 2758 |
config SYSVIPC_COMPAT |
3c2362e62 x86: use def_bool... |
2759 |
def_bool y |
3120e25ef x86/Kconfig: Clea... |
2760 |
depends on SYSVIPC |
3120e25ef x86/Kconfig: Clea... |
2761 |
endif |
ee009e4a0 KEYS: Add an iove... |
2762 |
|
e279b6c1d x86: start unific... |
2763 |
endmenu |
e5beae169 io mapping: clean... |
2764 2765 2766 |
config HAVE_ATOMIC_IOMAP def_bool y depends on X86_32 |
e279b6c1d x86: start unific... |
2767 |
source "drivers/firmware/Kconfig" |
edf884172 KVM: Move arch de... |
2768 |
source "arch/x86/kvm/Kconfig" |
5e8ebd841 x86: probe assemb... |
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source "arch/x86/Kconfig.assembler" |