| Kconfig (b19efcabb587e5470a423ef778905f47e5a47f1a) | Kconfig (2ae27137b2db89365f623a7694786cf6d1acb6c7) |
|---|---|
| 1# SPDX-License-Identifier: GPL-2.0 2# Select 32 or 64 bit 3config 64BIT 4 bool "64-bit kernel" if "$(ARCH)" = "x86" 5 default "$(ARCH)" != "i386" 6 ---help--- 7 Say yes to build a 64-bit kernel - formerly known as x86_64 8 Say no to build a 32-bit kernel - formerly known as i386 --- 79 unchanged lines hidden (view full) --- 88 select ARCH_STACKWALK 89 select ARCH_SUPPORTS_ACPI 90 select ARCH_SUPPORTS_ATOMIC_RMW 91 select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 92 select ARCH_USE_BUILTIN_BSWAP 93 select ARCH_USE_QUEUED_RWLOCKS 94 select ARCH_USE_QUEUED_SPINLOCKS 95 select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH | 1# SPDX-License-Identifier: GPL-2.0 2# Select 32 or 64 bit 3config 64BIT 4 bool "64-bit kernel" if "$(ARCH)" = "x86" 5 default "$(ARCH)" != "i386" 6 ---help--- 7 Say yes to build a 64-bit kernel - formerly known as x86_64 8 Say no to build a 32-bit kernel - formerly known as i386 --- 79 unchanged lines hidden (view full) --- 88 select ARCH_STACKWALK 89 select ARCH_SUPPORTS_ACPI 90 select ARCH_SUPPORTS_ATOMIC_RMW 91 select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 92 select ARCH_USE_BUILTIN_BSWAP 93 select ARCH_USE_QUEUED_RWLOCKS 94 select ARCH_USE_QUEUED_SPINLOCKS 95 select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH |
| 96 select ARCH_WANT_DEFAULT_BPF_JIT if X86_64 |
|
| 96 select ARCH_WANTS_DYNAMIC_TASK_STRUCT 97 select ARCH_WANT_HUGE_PMD_SHARE 98 select ARCH_WANTS_THP_SWAP if X86_64 | 97 select ARCH_WANTS_DYNAMIC_TASK_STRUCT 98 select ARCH_WANT_HUGE_PMD_SHARE 99 select ARCH_WANTS_THP_SWAP if X86_64 |
| 99 select BUILDTIME_EXTABLE_SORT | 100 select BUILDTIME_TABLE_SORT |
| 100 select CLKEVT_I8253 101 select CLOCKSOURCE_VALIDATE_LAST_CYCLE 102 select CLOCKSOURCE_WATCHDOG 103 select DCACHE_WORD_ACCESS 104 select EDAC_ATOMIC_SCRUB 105 select EDAC_SUPPORT 106 select GENERIC_CLOCKEVENTS 107 select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) --- 6 unchanged lines hidden (view full) --- 114 select GENERIC_IOMAP 115 select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP 116 select GENERIC_IRQ_MATRIX_ALLOCATOR if X86_LOCAL_APIC 117 select GENERIC_IRQ_MIGRATION if SMP 118 select GENERIC_IRQ_PROBE 119 select GENERIC_IRQ_RESERVATION_MODE 120 select GENERIC_IRQ_SHOW 121 select GENERIC_PENDING_IRQ if SMP | 101 select CLKEVT_I8253 102 select CLOCKSOURCE_VALIDATE_LAST_CYCLE 103 select CLOCKSOURCE_WATCHDOG 104 select DCACHE_WORD_ACCESS 105 select EDAC_ATOMIC_SCRUB 106 select EDAC_SUPPORT 107 select GENERIC_CLOCKEVENTS 108 select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) --- 6 unchanged lines hidden (view full) --- 115 select GENERIC_IOMAP 116 select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP 117 select GENERIC_IRQ_MATRIX_ALLOCATOR if X86_LOCAL_APIC 118 select GENERIC_IRQ_MIGRATION if SMP 119 select GENERIC_IRQ_PROBE 120 select GENERIC_IRQ_RESERVATION_MODE 121 select GENERIC_IRQ_SHOW 122 select GENERIC_PENDING_IRQ if SMP |
| 123 select GENERIC_PTDUMP |
|
| 122 select GENERIC_SMP_IDLE_THREAD 123 select GENERIC_STRNCPY_FROM_USER 124 select GENERIC_STRNLEN_USER 125 select GENERIC_TIME_VSYSCALL 126 select GENERIC_GETTIMEOFDAY | 124 select GENERIC_SMP_IDLE_THREAD 125 select GENERIC_STRNCPY_FROM_USER 126 select GENERIC_STRNLEN_USER 127 select GENERIC_TIME_VSYSCALL 128 select GENERIC_GETTIMEOFDAY |
| 129 select GENERIC_VDSO_TIME_NS |
|
| 127 select GUP_GET_PTE_LOW_HIGH if X86_PAE 128 select HARDLOCKUP_CHECK_TIMESTAMP if X86_64 129 select HAVE_ACPI_APEI if ACPI 130 select HAVE_ACPI_APEI_NMI if ACPI 131 select HAVE_ALIGNED_STRUCT_PAGE if SLUB 132 select HAVE_ARCH_AUDITSYSCALL 133 select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE 134 select HAVE_ARCH_JUMP_LABEL --- 299 unchanged lines hidden (view full) --- 434 bool "Enable MPS table" if ACPI || SFI 435 default y 436 depends on X86_LOCAL_APIC 437 ---help--- 438 For old smp systems that do not have proper acpi support. Newer systems 439 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it 440 441config GOLDFISH | 130 select GUP_GET_PTE_LOW_HIGH if X86_PAE 131 select HARDLOCKUP_CHECK_TIMESTAMP if X86_64 132 select HAVE_ACPI_APEI if ACPI 133 select HAVE_ACPI_APEI_NMI if ACPI 134 select HAVE_ALIGNED_STRUCT_PAGE if SLUB 135 select HAVE_ARCH_AUDITSYSCALL 136 select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE 137 select HAVE_ARCH_JUMP_LABEL --- 299 unchanged lines hidden (view full) --- 437 bool "Enable MPS table" if ACPI || SFI 438 default y 439 depends on X86_LOCAL_APIC 440 ---help--- 441 For old smp systems that do not have proper acpi support. Newer systems 442 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it 443 444config GOLDFISH |
| 442 def_bool y 443 depends on X86_GOLDFISH | 445 def_bool y 446 depends on X86_GOLDFISH |
| 444 445config RETPOLINE 446 bool "Avoid speculative indirect branches in kernel" 447 default y 448 select STACK_VALIDATION if HAVE_STACK_VALIDATION 449 help 450 Compile kernel with the retpoline compiler options to guard against 451 kernel-to-user data leaks by avoiding speculative indirect 452 branches. Requires a compiler with -mindirect-branch=thunk-extern 453 support for full protection. The kernel may run slower. 454 455config X86_CPU_RESCTRL 456 bool "x86 CPU resource control support" 457 depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD) 458 select KERNFS | 447 448config RETPOLINE 449 bool "Avoid speculative indirect branches in kernel" 450 default y 451 select STACK_VALIDATION if HAVE_STACK_VALIDATION 452 help 453 Compile kernel with the retpoline compiler options to guard against 454 kernel-to-user data leaks by avoiding speculative indirect 455 branches. Requires a compiler with -mindirect-branch=thunk-extern 456 support for full protection. The kernel may run slower. 457 458config X86_CPU_RESCTRL 459 bool "x86 CPU resource control support" 460 depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD) 461 select KERNFS |
| 462 select PROC_CPU_RESCTRL if PROC_FS |
|
| 459 help 460 Enable x86 CPU resource control support. 461 462 Provide support for the allocation and monitoring of system resources 463 usage by the CPU. 464 465 Intel calls this Intel Resource Director Technology 466 (Intel(R) RDT). More information about RDT can be found in the --- 5 unchanged lines hidden (view full) --- 472 473 Say N if unsure. 474 475if X86_32 476config X86_BIGSMP 477 bool "Support for big SMP systems with more than 8 CPUs" 478 depends on SMP 479 ---help--- | 463 help 464 Enable x86 CPU resource control support. 465 466 Provide support for the allocation and monitoring of system resources 467 usage by the CPU. 468 469 Intel calls this Intel Resource Director Technology 470 (Intel(R) RDT). More information about RDT can be found in the --- 5 unchanged lines hidden (view full) --- 476 477 Say N if unsure. 478 479if X86_32 480config X86_BIGSMP 481 bool "Support for big SMP systems with more than 8 CPUs" 482 depends on SMP 483 ---help--- |
| 480 This option is needed for the systems that have more than 8 CPUs | 484 This option is needed for the systems that have more than 8 CPUs. |
| 481 482config X86_EXTENDED_PLATFORM 483 bool "Support for extended (non-PC) x86 platforms" 484 default y 485 ---help--- 486 If you disable this option then the kernel will only support 487 standard PC platforms. (which covers the vast majority of 488 systems out there.) --- 67 unchanged lines hidden (view full) --- 556 ---help--- 557 This option is needed in order to support SGI Ultraviolet systems. 558 If you don't have one of these, you should say N here. 559 560# Following is an alphabetically sorted list of 32 bit extended platforms 561# Please maintain the alphabetic order if and when there are additions 562 563config X86_GOLDFISH | 485 486config X86_EXTENDED_PLATFORM 487 bool "Support for extended (non-PC) x86 platforms" 488 default y 489 ---help--- 490 If you disable this option then the kernel will only support 491 standard PC platforms. (which covers the vast majority of 492 systems out there.) --- 67 unchanged lines hidden (view full) --- 560 ---help--- 561 This option is needed in order to support SGI Ultraviolet systems. 562 If you don't have one of these, you should say N here. 563 564# Following is an alphabetically sorted list of 32 bit extended platforms 565# Please maintain the alphabetic order if and when there are additions 566 567config X86_GOLDFISH |
| 564 bool "Goldfish (Virtual Platform)" 565 depends on X86_EXTENDED_PLATFORM 566 ---help--- | 568 bool "Goldfish (Virtual Platform)" 569 depends on X86_EXTENDED_PLATFORM 570 ---help--- |
| 567 Enable support for the Goldfish virtual platform used primarily 568 for Android development. Unless you are building for the Android 569 Goldfish emulator say N here. 570 571config X86_INTEL_CE 572 bool "CE4100 TV platform" 573 depends on PCI 574 depends on PCI_GODIRECT --- 226 unchanged lines hidden (view full) --- 801 ---help--- 802 This option enables various optimizations for running under the KVM 803 hypervisor. It includes a paravirtualized clock, so that instead 804 of relying on a PIT (or probably other) emulation by the 805 underlying device model, the host provides the guest with 806 timing infrastructure such as time of day, and system time 807 808config ARCH_CPUIDLE_HALTPOLL | 571 Enable support for the Goldfish virtual platform used primarily 572 for Android development. Unless you are building for the Android 573 Goldfish emulator say N here. 574 575config X86_INTEL_CE 576 bool "CE4100 TV platform" 577 depends on PCI 578 depends on PCI_GODIRECT --- 226 unchanged lines hidden (view full) --- 805 ---help--- 806 This option enables various optimizations for running under the KVM 807 hypervisor. It includes a paravirtualized clock, so that instead 808 of relying on a PIT (or probably other) emulation by the 809 underlying device model, the host provides the guest with 810 timing infrastructure such as time of day, and system time 811 812config ARCH_CPUIDLE_HALTPOLL |
| 809 def_bool n 810 prompt "Disable host haltpoll when loading haltpoll driver" 811 help | 813 def_bool n 814 prompt "Disable host haltpoll when loading haltpoll driver" 815 help |
| 812 If virtualized under KVM, disable host haltpoll. 813 814config PVH 815 bool "Support for running PVH guests" 816 ---help--- 817 This option enables the PVH entry point for guest virtual machines 818 as specified in the x86/HVM direct boot ABI. 819 --- 62 unchanged lines hidden (view full) --- 882 883 Choose N to continue using the legacy 8254 timer. 884 885config HPET_EMULATE_RTC 886 def_bool y 887 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) 888 889config APB_TIMER | 816 If virtualized under KVM, disable host haltpoll. 817 818config PVH 819 bool "Support for running PVH guests" 820 ---help--- 821 This option enables the PVH entry point for guest virtual machines 822 as specified in the x86/HVM direct boot ABI. 823 --- 62 unchanged lines hidden (view full) --- 886 887 Choose N to continue using the legacy 8254 timer. 888 889config HPET_EMULATE_RTC 890 def_bool y 891 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) 892 893config APB_TIMER |
| 890 def_bool y if X86_INTEL_MID 891 prompt "Intel MID APB Timer Support" if X86_INTEL_MID 892 select DW_APB_TIMER 893 depends on X86_INTEL_MID && SFI 894 help 895 APB timer is the replacement for 8254, HPET on X86 MID platforms. 896 The APBT provides a stable time base on SMP 897 systems, unlike the TSC, but it is more expensive to access, 898 as it is off-chip. APB timers are always running regardless of CPU 899 C states, they are used as per CPU clockevent device when possible. | 894 def_bool y if X86_INTEL_MID 895 prompt "Intel MID APB Timer Support" if X86_INTEL_MID 896 select DW_APB_TIMER 897 depends on X86_INTEL_MID && SFI 898 help 899 APB timer is the replacement for 8254, HPET on X86 MID platforms. 900 The APBT provides a stable time base on SMP 901 systems, unlike the TSC, but it is more expensive to access, 902 as it is off-chip. APB timers are always running regardless of CPU 903 C states, they are used as per CPU clockevent device when possible. |
| 900 901# Mark as expert because too many people got it wrong. 902# The code disables itself when not needed. 903config DMI 904 default y 905 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK 906 bool "Enable DMI scanning" if EXPERT 907 ---help--- --- 122 unchanged lines hidden (view full) --- 1030 scheduler's CPU selection logic accordingly, so that higher 1031 overall system performance can be achieved. 1032 1033 This feature will have no effect on CPUs without this feature. 1034 1035 If unsure say Y here. 1036 1037config UP_LATE_INIT | 904 905# Mark as expert because too many people got it wrong. 906# The code disables itself when not needed. 907config DMI 908 default y 909 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK 910 bool "Enable DMI scanning" if EXPERT 911 ---help--- --- 122 unchanged lines hidden (view full) --- 1034 scheduler's CPU selection logic accordingly, so that higher 1035 overall system performance can be achieved. 1036 1037 This feature will have no effect on CPUs without this feature. 1038 1039 If unsure say Y here. 1040 1041config UP_LATE_INIT |
| 1038 def_bool y 1039 depends on !SMP && X86_LOCAL_APIC | 1042 def_bool y 1043 depends on !SMP && X86_LOCAL_APIC |
| 1040 1041config X86_UP_APIC 1042 bool "Local APIC support on uniprocessors" if !PCI_MSI 1043 default PCI_MSI 1044 depends on X86_32 && !SMP && !X86_32_NON_STANDARD 1045 ---help--- 1046 A local APIC (Advanced Programmable Interrupt Controller) is an 1047 integrated interrupt controller in the CPU. If you have a single-CPU --- 132 unchanged lines hidden (view full) --- 1180 mode and is not needed to run most 16-bit programs under Wine. 1181 1182 Enabling this option increases the complexity of the kernel 1183 and slows down exception handling a tiny bit. 1184 1185 If unsure, say N here. 1186 1187config VM86 | 1044 1045config X86_UP_APIC 1046 bool "Local APIC support on uniprocessors" if !PCI_MSI 1047 default PCI_MSI 1048 depends on X86_32 && !SMP && !X86_32_NON_STANDARD 1049 ---help--- 1050 A local APIC (Advanced Programmable Interrupt Controller) is an 1051 integrated interrupt controller in the CPU. If you have a single-CPU --- 132 unchanged lines hidden (view full) --- 1184 mode and is not needed to run most 16-bit programs under Wine. 1185 1186 Enabling this option increases the complexity of the kernel 1187 and slows down exception handling a tiny bit. 1188 1189 If unsure, say N here. 1190 1191config VM86 |
| 1188 bool 1189 default X86_LEGACY_VM86 | 1192 bool 1193 default X86_LEGACY_VM86 |
| 1190 1191config X86_16BIT 1192 bool "Enable support for 16-bit segments" if EXPERT 1193 default y 1194 depends on MODIFY_LDT_SYSCALL 1195 ---help--- 1196 This option is required by programs like Wine to run 16-bit 1197 protected mode legacy code on x86 processors. Disabling --- 4 unchanged lines hidden (view full) --- 1202 def_bool y 1203 depends on X86_16BIT && X86_32 1204 1205config X86_ESPFIX64 1206 def_bool y 1207 depends on X86_16BIT && X86_64 1208 1209config X86_VSYSCALL_EMULATION | 1194 1195config X86_16BIT 1196 bool "Enable support for 16-bit segments" if EXPERT 1197 default y 1198 depends on MODIFY_LDT_SYSCALL 1199 ---help--- 1200 This option is required by programs like Wine to run 16-bit 1201 protected mode legacy code on x86 processors. Disabling --- 4 unchanged lines hidden (view full) --- 1206 def_bool y 1207 depends on X86_16BIT && X86_32 1208 1209config X86_ESPFIX64 1210 def_bool y 1211 depends on X86_16BIT && X86_64 1212 1213config X86_VSYSCALL_EMULATION |
| 1210 bool "Enable vsyscall emulation" if EXPERT 1211 default y 1212 depends on X86_64 1213 ---help--- | 1214 bool "Enable vsyscall emulation" if EXPERT 1215 default y 1216 depends on X86_64 1217 ---help--- |
| 1214 This enables emulation of the legacy vsyscall page. Disabling 1215 it is roughly equivalent to booting with vsyscall=none, except 1216 that it will also disable the helpful warning if a program 1217 tries to use a vsyscall. With this option set to N, offending 1218 programs will just segfault, citing addresses of the form 1219 0xffffffffff600?00. 1220 1221 This option is required by many programs built before 2013, and --- 285 unchanged lines hidden (view full) --- 1507 linear 1 GB mappings (even if the CPU otherwise 1508 supports them), so don't confuse the user by printing 1509 that we have them enabled. 1510 1511config X86_CPA_STATISTICS 1512 bool "Enable statistic for Change Page Attribute" 1513 depends on DEBUG_FS 1514 ---help--- | 1218 This enables emulation of the legacy vsyscall page. Disabling 1219 it is roughly equivalent to booting with vsyscall=none, except 1220 that it will also disable the helpful warning if a program 1221 tries to use a vsyscall. With this option set to N, offending 1222 programs will just segfault, citing addresses of the form 1223 0xffffffffff600?00. 1224 1225 This option is required by many programs built before 2013, and --- 285 unchanged lines hidden (view full) --- 1511 linear 1 GB mappings (even if the CPU otherwise 1512 supports them), so don't confuse the user by printing 1513 that we have them enabled. 1514 1515config X86_CPA_STATISTICS 1516 bool "Enable statistic for Change Page Attribute" 1517 depends on DEBUG_FS 1518 ---help--- |
| 1515 Expose statistics about the Change Page Attribute mechanims, which | 1519 Expose statistics about the Change Page Attribute mechanism, which |
| 1516 helps to determine the effectiveness of preserving large and huge 1517 page mappings when mapping protections are changed. 1518 1519config AMD_MEM_ENCRYPT 1520 bool "AMD Secure Memory Encryption (SME) support" 1521 depends on X86_64 && CPU_SUP_AMD 1522 select DYNAMIC_PHYSICAL_MASK 1523 select ARCH_USE_MEMREMAP_PROT --- 14 unchanged lines hidden (view full) --- 1538 If set to Y, then the encryption of system memory can be 1539 deactivated with the mem_encrypt=off command line option. 1540 1541 If set to N, then the encryption of system memory can be 1542 activated with the mem_encrypt=on command line option. 1543 1544# Common NUMA Features 1545config NUMA | 1520 helps to determine the effectiveness of preserving large and huge 1521 page mappings when mapping protections are changed. 1522 1523config AMD_MEM_ENCRYPT 1524 bool "AMD Secure Memory Encryption (SME) support" 1525 depends on X86_64 && CPU_SUP_AMD 1526 select DYNAMIC_PHYSICAL_MASK 1527 select ARCH_USE_MEMREMAP_PROT --- 14 unchanged lines hidden (view full) --- 1542 If set to Y, then the encryption of system memory can be 1543 deactivated with the mem_encrypt=off command line option. 1544 1545 If set to N, then the encryption of system memory can be 1546 activated with the mem_encrypt=on command line option. 1547 1548# Common NUMA Features 1549config NUMA |
| 1546 bool "Numa Memory Allocation and Scheduler Support" | 1550 bool "NUMA Memory Allocation and Scheduler Support" |
| 1547 depends on SMP 1548 depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP) 1549 default y if X86_BIGSMP 1550 ---help--- | 1551 depends on SMP 1552 depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP) 1553 default y if X86_BIGSMP 1554 ---help--- |
| 1551 Enable NUMA (Non Uniform Memory Access) support. | 1555 Enable NUMA (Non-Uniform Memory Access) support. |
| 1552 1553 The kernel will try to allocate memory used by a CPU on the 1554 local memory controller of the CPU and add some more 1555 NUMA awareness to the kernel. 1556 1557 For 64-bit this is recommended if the system is Intel Core i7 1558 (or later), AMD Opteron, or EM64T NUMA. 1559 --- 83 unchanged lines hidden (view full) --- 1643 See Documentation/admin-guide/mm/memory-hotplug.rst for more information. 1644 If you are unsure how to answer this question, answer N. 1645 1646config ARCH_PROC_KCORE_TEXT 1647 def_bool y 1648 depends on X86_64 && PROC_KCORE 1649 1650config ILLEGAL_POINTER_VALUE | 1556 1557 The kernel will try to allocate memory used by a CPU on the 1558 local memory controller of the CPU and add some more 1559 NUMA awareness to the kernel. 1560 1561 For 64-bit this is recommended if the system is Intel Core i7 1562 (or later), AMD Opteron, or EM64T NUMA. 1563 --- 83 unchanged lines hidden (view full) --- 1647 See Documentation/admin-guide/mm/memory-hotplug.rst for more information. 1648 If you are unsure how to answer this question, answer N. 1649 1650config ARCH_PROC_KCORE_TEXT 1651 def_bool y 1652 depends on X86_64 && PROC_KCORE 1653 1654config ILLEGAL_POINTER_VALUE |
| 1651 hex 1652 default 0 if X86_32 1653 default 0xdead000000000000 if X86_64 | 1655 hex 1656 default 0 if X86_32 1657 default 0xdead000000000000 if X86_64 |
| 1654 1655config X86_PMEM_LEGACY_DEVICE 1656 bool 1657 1658config X86_PMEM_LEGACY 1659 tristate "Support non-standard NVDIMMs and ADR protected memory" 1660 depends on PHYS_ADDR_T_64BIT 1661 depends on BLK_DEV --- 218 unchanged lines hidden (view full) --- 1880 executed in user mode. These instructions unnecessarily expose 1881 information about the hardware state. 1882 1883 The vast majority of applications do not use these instructions. 1884 For the very few that do, software emulation is provided in 1885 specific cases in protected and virtual-8086 modes. Emulated 1886 results are dummy. 1887 | 1658 1659config X86_PMEM_LEGACY_DEVICE 1660 bool 1661 1662config X86_PMEM_LEGACY 1663 tristate "Support non-standard NVDIMMs and ADR protected memory" 1664 depends on PHYS_ADDR_T_64BIT 1665 depends on BLK_DEV --- 218 unchanged lines hidden (view full) --- 1884 executed in user mode. These instructions unnecessarily expose 1885 information about the hardware state. 1886 1887 The vast majority of applications do not use these instructions. 1888 For the very few that do, software emulation is provided in 1889 specific cases in protected and virtual-8086 modes. Emulated 1890 results are dummy. 1891 |
| 1888config X86_INTEL_MPX 1889 prompt "Intel MPX (Memory Protection Extensions)" 1890 def_bool n 1891 # Note: only available in 64-bit mode due to VMA flags shortage 1892 depends on CPU_SUP_INTEL && X86_64 1893 select ARCH_USES_HIGH_VMA_FLAGS 1894 ---help--- 1895 MPX provides hardware features that can be used in 1896 conjunction with compiler-instrumented code to check 1897 memory references. It is designed to detect buffer 1898 overflow or underflow bugs. 1899 1900 This option enables running applications which are 1901 instrumented or otherwise use MPX. It does not use MPX 1902 itself inside the kernel or to protect the kernel 1903 against bad memory references. 1904 1905 Enabling this option will make the kernel larger: 1906 ~8k of kernel text and 36 bytes of data on a 64-bit 1907 defconfig. It adds a long to the 'mm_struct' which 1908 will increase the kernel memory overhead of each 1909 process and adds some branches to paths used during 1910 exec() and munmap(). 1911 1912 For details, see Documentation/x86/intel_mpx.rst 1913 1914 If unsure, say N. 1915 | |
| 1916config X86_INTEL_MEMORY_PROTECTION_KEYS 1917 prompt "Intel Memory Protection Keys" 1918 def_bool y 1919 # Note: only available in 64-bit mode 1920 depends on CPU_SUP_INTEL && X86_64 1921 select ARCH_USES_HIGH_VMA_FLAGS 1922 select ARCH_HAS_PKEYS 1923 ---help--- --- 62 unchanged lines hidden (view full) --- 1986 This option is only useful on systems that have EFI firmware. 1987 In addition, you should use the latest ELILO loader available 1988 at <http://elilo.sourceforge.net> in order to take advantage 1989 of EFI runtime services. However, even with this option, the 1990 resultant kernel should continue to boot on existing non-EFI 1991 platforms. 1992 1993config EFI_STUB | 1892config X86_INTEL_MEMORY_PROTECTION_KEYS 1893 prompt "Intel Memory Protection Keys" 1894 def_bool y 1895 # Note: only available in 64-bit mode 1896 depends on CPU_SUP_INTEL && X86_64 1897 select ARCH_USES_HIGH_VMA_FLAGS 1898 select ARCH_HAS_PKEYS 1899 ---help--- --- 62 unchanged lines hidden (view full) --- 1962 This option is only useful on systems that have EFI firmware. 1963 In addition, you should use the latest ELILO loader available 1964 at <http://elilo.sourceforge.net> in order to take advantage 1965 of EFI runtime services. However, even with this option, the 1966 resultant kernel should continue to boot on existing non-EFI 1967 platforms. 1968 1969config EFI_STUB |
| 1994 bool "EFI stub support" 1995 depends on EFI && !X86_USE_3DNOW 1996 select RELOCATABLE 1997 ---help--- 1998 This kernel feature allows a bzImage to be loaded directly | 1970 bool "EFI stub support" 1971 depends on EFI && !X86_USE_3DNOW 1972 depends on $(cc-option,-mabi=ms) || X86_32 1973 select RELOCATABLE 1974 ---help--- 1975 This kernel feature allows a bzImage to be loaded directly |
| 1999 by EFI firmware without the use of a bootloader. 2000 2001 See Documentation/admin-guide/efi-stub.rst for more information. 2002 2003config EFI_MIXED 2004 bool "EFI mixed-mode support" 2005 depends on EFI_STUB && X86_64 2006 ---help--- --- 943 unchanged lines hidden (view full) --- 2950 2951endmenu 2952 2953 2954config HAVE_ATOMIC_IOMAP 2955 def_bool y 2956 depends on X86_32 2957 | 1976 by EFI firmware without the use of a bootloader. 1977 1978 See Documentation/admin-guide/efi-stub.rst for more information. 1979 1980config EFI_MIXED 1981 bool "EFI mixed-mode support" 1982 depends on EFI_STUB && X86_64 1983 ---help--- --- 943 unchanged lines hidden (view full) --- 2927 2928endmenu 2929 2930 2931config HAVE_ATOMIC_IOMAP 2932 def_bool y 2933 depends on X86_32 2934 |
| 2958config X86_DEV_DMA_OPS 2959 bool 2960 | |
| 2961source "drivers/firmware/Kconfig" 2962 2963source "arch/x86/kvm/Kconfig" | 2935source "drivers/firmware/Kconfig" 2936 2937source "arch/x86/kvm/Kconfig" |