| Kconfig (b11918bdbe79bd002d00a9f1d78958167ccfad99) | Kconfig (df3735c5b40fad8d0d28eb8ab065fe955b3347ee) |
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| 1# Select 32 or 64 bit 2config 64BIT 3 bool "64-bit kernel" if ARCH = "x86" 4 default ARCH != "i386" 5 ---help--- 6 Say yes to build a 64-bit kernel - formerly known as x86_64 7 Say no to build a 32-bit kernel - formerly known as i386 8 --- 41 unchanged lines hidden (view full) --- 50 select ARCH_HAS_DEVMEM_IS_ALLOWED 51 select ARCH_HAS_ELF_RANDOMIZE 52 select ARCH_HAS_FAST_MULTIPLIER 53 select ARCH_HAS_FORTIFY_SOURCE 54 select ARCH_HAS_GCOV_PROFILE_ALL 55 select ARCH_HAS_KCOV if X86_64 56 select ARCH_HAS_MMIO_FLUSH 57 select ARCH_HAS_PMEM_API if X86_64 | 1# Select 32 or 64 bit 2config 64BIT 3 bool "64-bit kernel" if ARCH = "x86" 4 default ARCH != "i386" 5 ---help--- 6 Say yes to build a 64-bit kernel - formerly known as x86_64 7 Say no to build a 32-bit kernel - formerly known as i386 8 --- 41 unchanged lines hidden (view full) --- 50 select ARCH_HAS_DEVMEM_IS_ALLOWED 51 select ARCH_HAS_ELF_RANDOMIZE 52 select ARCH_HAS_FAST_MULTIPLIER 53 select ARCH_HAS_FORTIFY_SOURCE 54 select ARCH_HAS_GCOV_PROFILE_ALL 55 select ARCH_HAS_KCOV if X86_64 56 select ARCH_HAS_MMIO_FLUSH 57 select ARCH_HAS_PMEM_API if X86_64 |
| 58 # Causing hangs/crashes, see the commit that added this change for details. 59 select ARCH_HAS_REFCOUNT if BROKEN |
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| 58 select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 59 select ARCH_HAS_SET_MEMORY 60 select ARCH_HAS_SG_CHAIN 61 select ARCH_HAS_STRICT_KERNEL_RWX 62 select ARCH_HAS_STRICT_MODULE_RWX 63 select ARCH_HAS_UBSAN_SANITIZE_ALL 64 select ARCH_HAS_ZONE_DEVICE if X86_64 65 select ARCH_HAVE_NMI_SAFE_CMPXCHG 66 select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI 67 select ARCH_MIGHT_HAVE_PC_PARPORT 68 select ARCH_MIGHT_HAVE_PC_SERIO 69 select ARCH_SUPPORTS_ATOMIC_RMW 70 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 71 select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 72 select ARCH_USE_BUILTIN_BSWAP 73 select ARCH_USE_QUEUED_RWLOCKS 74 select ARCH_USE_QUEUED_SPINLOCKS 75 select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH | 60 select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 61 select ARCH_HAS_SET_MEMORY 62 select ARCH_HAS_SG_CHAIN 63 select ARCH_HAS_STRICT_KERNEL_RWX 64 select ARCH_HAS_STRICT_MODULE_RWX 65 select ARCH_HAS_UBSAN_SANITIZE_ALL 66 select ARCH_HAS_ZONE_DEVICE if X86_64 67 select ARCH_HAVE_NMI_SAFE_CMPXCHG 68 select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI 69 select ARCH_MIGHT_HAVE_PC_PARPORT 70 select ARCH_MIGHT_HAVE_PC_SERIO 71 select ARCH_SUPPORTS_ATOMIC_RMW 72 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT 73 select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 74 select ARCH_USE_BUILTIN_BSWAP 75 select ARCH_USE_QUEUED_RWLOCKS 76 select ARCH_USE_QUEUED_SPINLOCKS 77 select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH |
| 76 select ARCH_WANT_FRAME_POINTERS | |
| 77 select ARCH_WANTS_DYNAMIC_TASK_STRUCT 78 select ARCH_WANTS_THP_SWAP if X86_64 79 select BUILDTIME_EXTABLE_SORT 80 select CLKEVT_I8253 81 select CLOCKSOURCE_VALIDATE_LAST_CYCLE 82 select CLOCKSOURCE_WATCHDOG 83 select DCACHE_WORD_ACCESS 84 select EDAC_ATOMIC_SCRUB --- 10 unchanged lines hidden (view full) --- 95 select GENERIC_IRQ_MIGRATION if SMP 96 select GENERIC_IRQ_PROBE 97 select GENERIC_IRQ_SHOW 98 select GENERIC_PENDING_IRQ if SMP 99 select GENERIC_SMP_IDLE_THREAD 100 select GENERIC_STRNCPY_FROM_USER 101 select GENERIC_STRNLEN_USER 102 select GENERIC_TIME_VSYSCALL | 78 select ARCH_WANTS_DYNAMIC_TASK_STRUCT 79 select ARCH_WANTS_THP_SWAP if X86_64 80 select BUILDTIME_EXTABLE_SORT 81 select CLKEVT_I8253 82 select CLOCKSOURCE_VALIDATE_LAST_CYCLE 83 select CLOCKSOURCE_WATCHDOG 84 select DCACHE_WORD_ACCESS 85 select EDAC_ATOMIC_SCRUB --- 10 unchanged lines hidden (view full) --- 96 select GENERIC_IRQ_MIGRATION if SMP 97 select GENERIC_IRQ_PROBE 98 select GENERIC_IRQ_SHOW 99 select GENERIC_PENDING_IRQ if SMP 100 select GENERIC_SMP_IDLE_THREAD 101 select GENERIC_STRNCPY_FROM_USER 102 select GENERIC_STRNLEN_USER 103 select GENERIC_TIME_VSYSCALL |
| 104 select HARDLOCKUP_CHECK_TIMESTAMP if X86_64 |
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| 103 select HAVE_ACPI_APEI if ACPI 104 select HAVE_ACPI_APEI_NMI if ACPI 105 select HAVE_ALIGNED_STRUCT_PAGE if SLUB 106 select HAVE_ARCH_AUDITSYSCALL 107 select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE 108 select HAVE_ARCH_JUMP_LABEL 109 select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP 110 select HAVE_ARCH_KGDB --- 41 unchanged lines hidden (view full) --- 152 select HAVE_KPROBES 153 select HAVE_KPROBES_ON_FTRACE 154 select HAVE_KRETPROBES 155 select HAVE_KVM 156 select HAVE_LIVEPATCH if X86_64 157 select HAVE_MEMBLOCK 158 select HAVE_MEMBLOCK_NODE_MAP 159 select HAVE_MIXED_BREAKPOINTS_REGS | 105 select HAVE_ACPI_APEI if ACPI 106 select HAVE_ACPI_APEI_NMI if ACPI 107 select HAVE_ALIGNED_STRUCT_PAGE if SLUB 108 select HAVE_ARCH_AUDITSYSCALL 109 select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE 110 select HAVE_ARCH_JUMP_LABEL 111 select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP 112 select HAVE_ARCH_KGDB --- 41 unchanged lines hidden (view full) --- 154 select HAVE_KPROBES 155 select HAVE_KPROBES_ON_FTRACE 156 select HAVE_KRETPROBES 157 select HAVE_KVM 158 select HAVE_LIVEPATCH if X86_64 159 select HAVE_MEMBLOCK 160 select HAVE_MEMBLOCK_NODE_MAP 161 select HAVE_MIXED_BREAKPOINTS_REGS |
| 162 select HAVE_MOD_ARCH_SPECIFIC |
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| 160 select HAVE_NMI 161 select HAVE_OPROFILE 162 select HAVE_OPTPROBES 163 select HAVE_PCSPKR_PLATFORM 164 select HAVE_PERF_EVENTS 165 select HAVE_PERF_EVENTS_NMI | 163 select HAVE_NMI 164 select HAVE_OPROFILE 165 select HAVE_OPTPROBES 166 select HAVE_PCSPKR_PLATFORM 167 select HAVE_PERF_EVENTS 168 select HAVE_PERF_EVENTS_NMI |
| 166 select HAVE_HARDLOCKUP_DETECTOR_PERF if HAVE_PERF_EVENTS_NMI | 169 select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI |
| 167 select HAVE_PERF_REGS 168 select HAVE_PERF_USER_STACK_DUMP | 170 select HAVE_PERF_REGS 171 select HAVE_PERF_USER_STACK_DUMP |
| 172 select HAVE_RCU_TABLE_FREE |
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| 169 select HAVE_REGS_AND_STACK_ACCESS_API | 173 select HAVE_REGS_AND_STACK_ACCESS_API |
| 170 select HAVE_RELIABLE_STACKTRACE if X86_64 && FRAME_POINTER && STACK_VALIDATION | 174 select HAVE_RELIABLE_STACKTRACE if X86_64 && FRAME_POINTER_UNWINDER && STACK_VALIDATION |
| 171 select HAVE_STACK_VALIDATION if X86_64 172 select HAVE_SYSCALL_TRACEPOINTS 173 select HAVE_UNSTABLE_SCHED_CLOCK 174 select HAVE_USER_RETURN_NOTIFIER 175 select IRQ_FORCED_THREADING 176 select PCI_LOCKLESS_CONFIG 177 select PERF_EVENTS 178 select RTC_LIB --- 142 unchanged lines hidden (view full) --- 321config ARCH_SUPPORTS_UPROBES 322 def_bool y 323 324config FIX_EARLYCON_MEM 325 def_bool y 326 327config PGTABLE_LEVELS 328 int | 175 select HAVE_STACK_VALIDATION if X86_64 176 select HAVE_SYSCALL_TRACEPOINTS 177 select HAVE_UNSTABLE_SCHED_CLOCK 178 select HAVE_USER_RETURN_NOTIFIER 179 select IRQ_FORCED_THREADING 180 select PCI_LOCKLESS_CONFIG 181 select PERF_EVENTS 182 select RTC_LIB --- 142 unchanged lines hidden (view full) --- 325config ARCH_SUPPORTS_UPROBES 326 def_bool y 327 328config FIX_EARLYCON_MEM 329 def_bool y 330 331config PGTABLE_LEVELS 332 int |
| 333 default 5 if X86_5LEVEL |
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| 329 default 4 if X86_64 330 default 3 if X86_PAE 331 default 2 332 333source "init/Kconfig" 334source "kernel/Kconfig.freezer" 335 336menu "Processor type and features" --- 82 unchanged lines hidden (view full) --- 419 depends on X86_32 && SMP 420 ---help--- 421 This option is needed for the systems that have more than 8 CPUs 422 423config GOLDFISH 424 def_bool y 425 depends on X86_GOLDFISH 426 | 334 default 4 if X86_64 335 default 3 if X86_PAE 336 default 2 337 338source "init/Kconfig" 339source "kernel/Kconfig.freezer" 340 341menu "Processor type and features" --- 82 unchanged lines hidden (view full) --- 424 depends on X86_32 && SMP 425 ---help--- 426 This option is needed for the systems that have more than 8 CPUs 427 428config GOLDFISH 429 def_bool y 430 depends on X86_GOLDFISH 431 |
| 427config INTEL_RDT_A 428 bool "Intel Resource Director Technology Allocation support" | 432config INTEL_RDT 433 bool "Intel Resource Director Technology support" |
| 429 default n 430 depends on X86 && CPU_SUP_INTEL 431 select KERNFS 432 help | 434 default n 435 depends on X86 && CPU_SUP_INTEL 436 select KERNFS 437 help |
| 433 Select to enable resource allocation which is a sub-feature of 434 Intel Resource Director Technology(RDT). More information about 435 RDT can be found in the Intel x86 Architecture Software 436 Developer Manual. | 438 Select to enable resource allocation and monitoring which are 439 sub-features of Intel Resource Director Technology(RDT). More 440 information about RDT can be found in the Intel x86 441 Architecture Software Developer Manual. |
| 437 438 Say N if unsure. 439 440if X86_32 441config X86_EXTENDED_PLATFORM 442 bool "Support for extended (non-PC) x86 platforms" 443 default y 444 ---help--- --- 327 unchanged lines hidden (view full) --- 772 bool "Enable debug information for KVM Guests in debugfs" 773 depends on KVM_GUEST && DEBUG_FS 774 default n 775 ---help--- 776 This option enables collection of various statistics for KVM guest. 777 Statistics are displayed in debugfs filesystem. Enabling this option 778 may incur significant overhead. 779 | 442 443 Say N if unsure. 444 445if X86_32 446config X86_EXTENDED_PLATFORM 447 bool "Support for extended (non-PC) x86 platforms" 448 default y 449 ---help--- --- 327 unchanged lines hidden (view full) --- 777 bool "Enable debug information for KVM Guests in debugfs" 778 depends on KVM_GUEST && DEBUG_FS 779 default n 780 ---help--- 781 This option enables collection of various statistics for KVM guest. 782 Statistics are displayed in debugfs filesystem. Enabling this option 783 may incur significant overhead. 784 |
| 780source "arch/x86/lguest/Kconfig" 781 | |
| 782config PARAVIRT_TIME_ACCOUNTING 783 bool "Paravirtual steal time accounting" 784 depends on PARAVIRT 785 default n 786 ---help--- 787 Select this option to enable fine granularity task steal time 788 accounting. Time spent executing other tasks in parallel with 789 the current vCPU is discounted from the vCPU power. To account for --- 603 unchanged lines hidden (view full) --- 1393 depends on X86_32 && !HIGHMEM4G 1394 select SWIOTLB 1395 ---help--- 1396 PAE is required for NX support, and furthermore enables 1397 larger swapspace support for non-overcommit purposes. It 1398 has the cost of more pagetable lookup overhead, and also 1399 consumes more pagetable space per process. 1400 | 785config PARAVIRT_TIME_ACCOUNTING 786 bool "Paravirtual steal time accounting" 787 depends on PARAVIRT 788 default n 789 ---help--- 790 Select this option to enable fine granularity task steal time 791 accounting. Time spent executing other tasks in parallel with 792 the current vCPU is discounted from the vCPU power. To account for --- 603 unchanged lines hidden (view full) --- 1396 depends on X86_32 && !HIGHMEM4G 1397 select SWIOTLB 1398 ---help--- 1399 PAE is required for NX support, and furthermore enables 1400 larger swapspace support for non-overcommit purposes. It 1401 has the cost of more pagetable lookup overhead, and also 1402 consumes more pagetable space per process. 1403 |
| 1404config X86_5LEVEL 1405 bool "Enable 5-level page tables support" 1406 depends on X86_64 1407 ---help--- 1408 5-level paging enables access to larger address space: 1409 upto 128 PiB of virtual address space and 4 PiB of 1410 physical address space. 1411 1412 It will be supported by future Intel CPUs. 1413 1414 Note: a kernel with this option enabled can only be booted 1415 on machines that support the feature. 1416 1417 See Documentation/x86/x86_64/5level-paging.txt for more 1418 information. 1419 1420 Say N if unsure. 1421 |
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| 1401config ARCH_PHYS_ADDR_T_64BIT 1402 def_bool y 1403 depends on X86_64 || X86_PAE 1404 1405config ARCH_DMA_ADDR_T_64BIT 1406 def_bool y 1407 depends on X86_64 || HIGHMEM64G 1408 1409config X86_DIRECT_GBPAGES 1410 def_bool y 1411 depends on X86_64 && !DEBUG_PAGEALLOC && !KMEMCHECK 1412 ---help--- 1413 Certain kernel features effectively disable kernel 1414 linear 1 GB mappings (even if the CPU otherwise 1415 supports them), so don't confuse the user by printing 1416 that we have them enabled. 1417 | 1422config ARCH_PHYS_ADDR_T_64BIT 1423 def_bool y 1424 depends on X86_64 || X86_PAE 1425 1426config ARCH_DMA_ADDR_T_64BIT 1427 def_bool y 1428 depends on X86_64 || HIGHMEM64G 1429 1430config X86_DIRECT_GBPAGES 1431 def_bool y 1432 depends on X86_64 && !DEBUG_PAGEALLOC && !KMEMCHECK 1433 ---help--- 1434 Certain kernel features effectively disable kernel 1435 linear 1 GB mappings (even if the CPU otherwise 1436 supports them), so don't confuse the user by printing 1437 that we have them enabled. 1438 |
| 1439config ARCH_HAS_MEM_ENCRYPT 1440 def_bool y 1441 1442config AMD_MEM_ENCRYPT 1443 bool "AMD Secure Memory Encryption (SME) support" 1444 depends on X86_64 && CPU_SUP_AMD 1445 ---help--- 1446 Say yes to enable support for the encryption of system memory. 1447 This requires an AMD processor that supports Secure Memory 1448 Encryption (SME). 1449 1450config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT 1451 bool "Activate AMD Secure Memory Encryption (SME) by default" 1452 default y 1453 depends on AMD_MEM_ENCRYPT 1454 ---help--- 1455 Say yes to have system memory encrypted by default if running on 1456 an AMD processor that supports Secure Memory Encryption (SME). 1457 1458 If set to Y, then the encryption of system memory can be 1459 deactivated with the mem_encrypt=off command line option. 1460 1461 If set to N, then the encryption of system memory can be 1462 activated with the mem_encrypt=on command line option. 1463 1464config ARCH_USE_MEMREMAP_PROT 1465 def_bool y 1466 depends on AMD_MEM_ENCRYPT 1467 |
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| 1418# Common NUMA Features 1419config NUMA 1420 bool "Numa Memory Allocation and Scheduler Support" 1421 depends on SMP 1422 depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP) 1423 default y if X86_BIGSMP 1424 ---help--- 1425 Enable NUMA (Non Uniform Memory Access) support. --- 325 unchanged lines hidden (view full) --- 1751 performance cost if this enabled and turned on; there is 1752 also a small increase in the kernel size if this is enabled. 1753 1754 If unsure, say Y. 1755 1756config X86_INTEL_MPX 1757 prompt "Intel MPX (Memory Protection Extensions)" 1758 def_bool n | 1468# Common NUMA Features 1469config NUMA 1470 bool "Numa Memory Allocation and Scheduler Support" 1471 depends on SMP 1472 depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP) 1473 default y if X86_BIGSMP 1474 ---help--- 1475 Enable NUMA (Non Uniform Memory Access) support. --- 325 unchanged lines hidden (view full) --- 1801 performance cost if this enabled and turned on; there is 1802 also a small increase in the kernel size if this is enabled. 1803 1804 If unsure, say Y. 1805 1806config X86_INTEL_MPX 1807 prompt "Intel MPX (Memory Protection Extensions)" 1808 def_bool n |
| 1759 depends on CPU_SUP_INTEL | 1809 # Note: only available in 64-bit mode due to VMA flags shortage 1810 depends on CPU_SUP_INTEL && X86_64 1811 select ARCH_USES_HIGH_VMA_FLAGS |
| 1760 ---help--- 1761 MPX provides hardware features that can be used in 1762 conjunction with compiler-instrumented code to check 1763 memory references. It is designed to detect buffer 1764 overflow or underflow bugs. 1765 1766 This option enables running applications which are 1767 instrumented or otherwise use MPX. It does not use MPX --- 1056 unchanged lines hidden --- | 1812 ---help--- 1813 MPX provides hardware features that can be used in 1814 conjunction with compiler-instrumented code to check 1815 memory references. It is designed to detect buffer 1816 overflow or underflow bugs. 1817 1818 This option enables running applications which are 1819 instrumented or otherwise use MPX. It does not use MPX --- 1056 unchanged lines hidden --- |