1 # SPDX-License-Identifier: GPL-2.0
11 config STACKTRACE_SUPPORT
14 config ARCH_HAS_ILOG2_U32
17 config ARCH_HAS_ILOG2_U64
20 config GENERIC_HWEIGHT
26 config GENERIC_BUG_RELATIVE_POINTERS
29 config GENERIC_LOCKBREAK
30 def_bool y if PREEMPTION
44 config ARCH_SUPPORTS_UPROBES
47 config KASAN_SHADOW_OFFSET
50 default 0x1C000000000000
55 # Note: keep this list sorted alphabetically
57 imply IMA_SECURE_AND_OR_TRUSTED_BOOT
58 select ALTERNATE_USER_ADDRESS_SPACE
59 select ARCH_32BIT_USTAT_F_TINODE
60 select ARCH_BINFMT_ELF_STATE
61 select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
62 select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
63 select ARCH_ENABLE_MEMORY_HOTREMOVE
64 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
65 select ARCH_HAS_CURRENT_STACK_POINTER
66 select ARCH_HAS_DEBUG_VIRTUAL
67 select ARCH_HAS_DEBUG_VM_PGTABLE
68 select ARCH_HAS_DEBUG_WX
69 select ARCH_HAS_DEVMEM_IS_ALLOWED
70 select ARCH_HAS_ELF_RANDOMIZE
71 select ARCH_HAS_FORCE_DMA_UNENCRYPTED
72 select ARCH_HAS_FORTIFY_SOURCE
73 select ARCH_HAS_GCOV_PROFILE_ALL
74 select ARCH_HAS_GIGANTIC_PAGE
76 select ARCH_HAS_MEMBARRIER_SYNC_CORE
77 select ARCH_HAS_MEM_ENCRYPT
78 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
79 select ARCH_HAS_PTE_SPECIAL
80 select ARCH_HAS_SCALED_CPUTIME
81 select ARCH_HAS_SET_DIRECT_MAP
82 select ARCH_HAS_SET_MEMORY
83 select ARCH_HAS_STRICT_KERNEL_RWX
84 select ARCH_HAS_STRICT_MODULE_RWX
85 select ARCH_HAS_SYSCALL_WRAPPER
87 select ARCH_HAS_VDSO_DATA
88 select ARCH_HAVE_NMI_SAFE_CMPXCHG
89 select ARCH_INLINE_READ_LOCK
90 select ARCH_INLINE_READ_LOCK_BH
91 select ARCH_INLINE_READ_LOCK_IRQ
92 select ARCH_INLINE_READ_LOCK_IRQSAVE
93 select ARCH_INLINE_READ_TRYLOCK
94 select ARCH_INLINE_READ_UNLOCK
95 select ARCH_INLINE_READ_UNLOCK_BH
96 select ARCH_INLINE_READ_UNLOCK_IRQ
97 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
98 select ARCH_INLINE_SPIN_LOCK
99 select ARCH_INLINE_SPIN_LOCK_BH
100 select ARCH_INLINE_SPIN_LOCK_IRQ
101 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
102 select ARCH_INLINE_SPIN_TRYLOCK
103 select ARCH_INLINE_SPIN_TRYLOCK_BH
104 select ARCH_INLINE_SPIN_UNLOCK
105 select ARCH_INLINE_SPIN_UNLOCK_BH
106 select ARCH_INLINE_SPIN_UNLOCK_IRQ
107 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
108 select ARCH_INLINE_WRITE_LOCK
109 select ARCH_INLINE_WRITE_LOCK_BH
110 select ARCH_INLINE_WRITE_LOCK_IRQ
111 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
112 select ARCH_INLINE_WRITE_TRYLOCK
113 select ARCH_INLINE_WRITE_UNLOCK
114 select ARCH_INLINE_WRITE_UNLOCK_BH
115 select ARCH_INLINE_WRITE_UNLOCK_IRQ
116 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
117 select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
118 select ARCH_STACKWALK
119 select ARCH_SUPPORTS_ATOMIC_RMW
120 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
121 select ARCH_SUPPORTS_HUGETLBFS
122 select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && CC_IS_CLANG
123 select ARCH_SUPPORTS_NUMA_BALANCING
124 select ARCH_SUPPORTS_PER_VMA_LOCK
125 select ARCH_USE_BUILTIN_BSWAP
126 select ARCH_USE_CMPXCHG_LOCKREF
127 select ARCH_USE_SYM_ANNOTATIONS
128 select ARCH_WANTS_NO_INSTR
129 select ARCH_WANT_DEFAULT_BPF_JIT
130 select ARCH_WANT_IPC_PARSE_VERSION
131 select ARCH_WANT_KERNEL_PMD_MKWRITE
132 select ARCH_WANT_LD_ORPHAN_WARN
133 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
134 select BUILDTIME_TABLE_SORT
135 select CLONE_BACKWARDS2
136 select DCACHE_WORD_ACCESS if !KMSAN
137 select DMA_OPS if PCI
138 select DYNAMIC_FTRACE if FUNCTION_TRACER
139 select FUNCTION_ALIGNMENT_8B if CC_IS_GCC
140 select FUNCTION_ALIGNMENT_16B if !CC_IS_GCC
141 select GENERIC_ALLOCATOR
142 select GENERIC_CPU_AUTOPROBE
143 select GENERIC_CPU_VULNERABILITIES
145 select GENERIC_GETTIMEOFDAY
146 select GENERIC_PTDUMP
147 select GENERIC_SMP_IDLE_THREAD
148 select GENERIC_TIME_VSYSCALL
149 select GENERIC_VDSO_TIME_NS
150 select GENERIC_IOREMAP if PCI
151 select HAVE_ALIGNED_STRUCT_PAGE
152 select HAVE_ARCH_AUDITSYSCALL
153 select HAVE_ARCH_JUMP_LABEL
154 select HAVE_ARCH_JUMP_LABEL_RELATIVE
155 select HAVE_ARCH_KASAN
156 select HAVE_ARCH_KASAN_VMALLOC
157 select HAVE_ARCH_KCSAN
158 select HAVE_ARCH_KFENCE
159 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
160 select HAVE_ARCH_SECCOMP_FILTER
161 select HAVE_ARCH_SOFT_DIRTY
162 select HAVE_ARCH_STACKLEAK
163 select HAVE_ARCH_TRACEHOOK
164 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
165 select HAVE_ARCH_VMAP_STACK
166 select HAVE_ASM_MODVERSIONS
167 select HAVE_CMPXCHG_DOUBLE
168 select HAVE_CMPXCHG_LOCAL
169 select HAVE_DEBUG_KMEMLEAK
170 select HAVE_DMA_CONTIGUOUS
171 select HAVE_DYNAMIC_FTRACE
172 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
173 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
174 select HAVE_DYNAMIC_FTRACE_WITH_REGS
175 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
176 select HAVE_EFFICIENT_UNALIGNED_ACCESS
179 select HAVE_FTRACE_MCOUNT_RECORD
180 select HAVE_FUNCTION_ARG_ACCESS_API
181 select HAVE_FUNCTION_ERROR_INJECTION
182 select HAVE_FUNCTION_GRAPH_RETVAL
183 select HAVE_FUNCTION_GRAPH_TRACER
184 select HAVE_FUNCTION_TRACER
185 select HAVE_GCC_PLUGINS
186 select HAVE_GENERIC_VDSO
187 select HAVE_IOREMAP_PROT if PCI
188 select HAVE_KERNEL_BZIP2
189 select HAVE_KERNEL_GZIP
190 select HAVE_KERNEL_LZ4
191 select HAVE_KERNEL_LZMA
192 select HAVE_KERNEL_LZO
193 select HAVE_KERNEL_UNCOMPRESSED
194 select HAVE_KERNEL_XZ
195 select HAVE_KERNEL_ZSTD
197 select HAVE_KPROBES_ON_FTRACE
198 select HAVE_KRETPROBES
199 select HAVE_LIVEPATCH
200 select HAVE_MEMBLOCK_PHYS_MAP
201 select HAVE_MOD_ARCH_SPECIFIC
203 select HAVE_NOP_MCOUNT
204 select HAVE_PAGE_SIZE_4KB
206 select HAVE_PERF_EVENTS
207 select HAVE_PERF_REGS
208 select HAVE_PERF_USER_STACK_DUMP
209 select HAVE_REGS_AND_STACK_ACCESS_API
210 select HAVE_RELIABLE_STACKTRACE
213 select HAVE_SAMPLE_FTRACE_DIRECT
214 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
215 select HAVE_SETUP_PER_CPU_AREA
216 select HAVE_SOFTIRQ_ON_OWN_STACK
217 select HAVE_SYSCALL_TRACEPOINTS
218 select HAVE_VIRT_CPU_ACCOUNTING
219 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
220 select IOMMU_HELPER if PCI
221 select IOMMU_SUPPORT if PCI
222 select MMU_GATHER_MERGE_VMAS
223 select MMU_GATHER_NO_GATHER
224 select MMU_GATHER_RCU_TABLE_FREE
225 select MODULES_USE_ELF_RELA
226 select NEED_DMA_MAP_STATE if PCI
227 select NEED_PER_CPU_EMBED_FIRST_CHUNK
228 select NEED_SG_DMA_LENGTH if PCI
230 select OLD_SIGSUSPEND3
231 select PCI_DOMAINS if PCI
232 select PCI_MSI if PCI
233 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
236 select SYSCTL_EXCEPTION_TRACE
237 select THREAD_INFO_IN_TASK
238 select TRACE_IRQFLAGS_SUPPORT
240 select USER_STACKTRACE_SUPPORT
241 select VIRT_CPU_ACCOUNTING
243 # Note: keep the above list sorted alphabetically
245 config SCHED_OMIT_FRAME_POINTER
248 config PGTABLE_LEVELS
252 source "kernel/livepatch/Kconfig"
254 config ARCH_SUPPORTS_KEXEC
257 config ARCH_SUPPORTS_KEXEC_FILE
260 config ARCH_SUPPORTS_KEXEC_SIG
261 def_bool MODULE_SIG_FORMAT
263 config ARCH_SUPPORTS_KEXEC_PURGATORY
266 config ARCH_SUPPORTS_CRASH_DUMP
269 Refer to <file:Documentation/arch/s390/zfcpdump.rst> for more details on this.
270 This option also enables s390 zfcpdump.
271 See also <file:Documentation/arch/s390/zfcpdump.rst>
273 menu "Processor type and features"
275 config HAVE_MARCH_Z10_FEATURES
278 config HAVE_MARCH_Z196_FEATURES
280 select HAVE_MARCH_Z10_FEATURES
282 config HAVE_MARCH_ZEC12_FEATURES
284 select HAVE_MARCH_Z196_FEATURES
286 config HAVE_MARCH_Z13_FEATURES
288 select HAVE_MARCH_ZEC12_FEATURES
290 config HAVE_MARCH_Z14_FEATURES
292 select HAVE_MARCH_Z13_FEATURES
294 config HAVE_MARCH_Z15_FEATURES
296 select HAVE_MARCH_Z14_FEATURES
298 config HAVE_MARCH_Z16_FEATURES
300 select HAVE_MARCH_Z15_FEATURES
303 prompt "Processor type"
307 bool "IBM System z10"
308 select HAVE_MARCH_Z10_FEATURES
309 depends on $(cc-option,-march=z10)
311 Select this to enable optimizations for IBM System z10 (2097 and 2098
312 series). This is the oldest machine generation currently supported.
315 bool "IBM zEnterprise 114 and 196"
316 select HAVE_MARCH_Z196_FEATURES
317 depends on $(cc-option,-march=z196)
319 Select this to enable optimizations for IBM zEnterprise 114 and 196
320 (2818 and 2817 series). The kernel will be slightly faster but will
321 not work on older machines.
324 bool "IBM zBC12 and zEC12"
325 select HAVE_MARCH_ZEC12_FEATURES
326 depends on $(cc-option,-march=zEC12)
328 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
329 2827 series). The kernel will be slightly faster but will not work on
333 bool "IBM z13s and z13"
334 select HAVE_MARCH_Z13_FEATURES
335 depends on $(cc-option,-march=z13)
337 Select this to enable optimizations for IBM z13s and z13 (2965 and
338 2964 series). The kernel will be slightly faster but will not work on
342 bool "IBM z14 ZR1 and z14"
343 select HAVE_MARCH_Z14_FEATURES
344 depends on $(cc-option,-march=z14)
346 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
347 and 3906 series). The kernel will be slightly faster but will not
348 work on older machines.
352 select HAVE_MARCH_Z15_FEATURES
353 depends on $(cc-option,-march=z15)
355 Select this to enable optimizations for IBM z15 (8562
356 and 8561 series). The kernel will be slightly faster but will not
357 work on older machines.
361 select HAVE_MARCH_Z16_FEATURES
362 depends on $(cc-option,-march=z16)
364 Select this to enable optimizations for IBM z16 (3931 and
369 config MARCH_Z10_TUNE
370 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
372 config MARCH_Z196_TUNE
373 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
375 config MARCH_ZEC12_TUNE
376 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
378 config MARCH_Z13_TUNE
379 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
381 config MARCH_Z14_TUNE
382 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
384 config MARCH_Z15_TUNE
385 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
387 config MARCH_Z16_TUNE
388 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
391 prompt "Tune code generation"
394 Cause the compiler to tune (-mtune) the generated code for a machine.
395 This will make the code run faster on the selected machine but
396 somewhat slower on other machines.
397 This option only changes how the compiler emits instructions, not the
398 selection of instructions itself, so the resulting kernel will run on
404 Tune the generated code for the target processor for which the kernel
408 bool "IBM System z10"
411 bool "IBM zEnterprise 114 and 196"
412 depends on $(cc-option,-mtune=z196)
415 bool "IBM zBC12 and zEC12"
416 depends on $(cc-option,-mtune=zEC12)
419 bool "IBM z13s and z13"
420 depends on $(cc-option,-mtune=z13)
423 bool "IBM z14 ZR1 and z14"
424 depends on $(cc-option,-mtune=z14)
428 depends on $(cc-option,-mtune=z15)
432 depends on $(cc-option,-mtune=z16)
439 config COMMAND_LINE_SIZE
440 int "Maximum size of kernel command line"
444 This allows you to specify the maximum length of the kernel command
449 prompt "Kernel support for 31 bit emulation"
450 select ARCH_WANT_OLD_COMPAT_IPC
451 select COMPAT_OLD_SIGACTION
454 depends on !CC_IS_CLANG && !LD_IS_LLD
456 Select this option if you want to enable your system kernel to
457 handle system-calls from ELF binaries for 31 bit ESA. This option
458 (and some other stuff like libraries and such) is needed for
459 executing 31 bit applications.
467 int "Maximum number of CPUs (2-512)"
471 This allows you to specify the maximum number of CPUs which this
472 kernel will support. The maximum supported value is 512 and the
473 minimum value which makes sense is 2.
475 This is purely to save memory - each supported CPU adds
476 approximately sixteen kilobytes to the kernel image.
483 depends on SCHED_TOPOLOGY
488 This option adds NUMA support to the kernel.
501 config SCHED_TOPOLOGY
503 prompt "Topology scheduler support"
507 Topology scheduler support improves the CPU scheduler's decision
508 making when dealing with machines that have multi-threading,
509 multiple cores or multiple books.
511 source "kernel/Kconfig.hz"
514 bool "Get user certificates via DIAG320"
516 select CRYPTO_LIB_SHA256
518 Enable this option if you want to access user-provided secure boot
519 certificates via DIAG 0x320.
521 These certificates will be made available via the keyring named
526 prompt "Enable modified branch prediction for the kernel by default"
528 If this option is selected the kernel will switch to a modified
529 branch prediction mode if the firmware interface is available.
530 The modified branch prediction mode improves the behaviour in
531 regard to speculative execution.
533 With the option enabled the kernel parameter "nobp=0" or "nospec"
534 can be used to run the kernel in the normal branch prediction mode.
536 With the option disabled the modified branch prediction mode is
537 enabled with the "nobp=1" kernel parameter.
543 depends on $(cc-option,-mindirect-branch=thunk)
544 prompt "Avoid speculative indirect branches in the kernel"
546 Compile the kernel with the expoline compiler options to guard
547 against kernel-to-user data leaks by avoiding speculative indirect
549 Requires a compiler with -mindirect-branch=thunk support for full
550 protection. The kernel may run slower.
554 config EXPOLINE_EXTERN
557 depends on CC_IS_GCC && GCC_VERSION >= 110200
558 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
559 prompt "Generate expolines as extern functions."
561 This option is required for some tooling like kpatch. The kernel is
562 compiled with -mindirect-branch=thunk-extern and requires a newer
568 prompt "Expoline default"
570 default EXPOLINE_FULL
573 bool "spectre_v2=off"
576 bool "spectre_v2=auto"
586 This builds a kernel image that retains relocation information
587 so it can be loaded at an arbitrary address.
588 The relocations make the kernel image about 15% larger (compressed
589 10%), but are discarded at runtime.
590 Note: this option exists only for documentation purposes, please do
594 def_bool CC_IS_CLANG && !$(cc-option,-munaligned-symbols)
596 If the compiler is unable to generate code that can manage unaligned
597 symbols, the kernel is linked as a position-independent executable
598 (PIE) and includes dynamic relocations that are processed early
601 For kpatch functionality, it is recommended to build the kernel
602 without the PIE_BUILD option. PIE_BUILD is only enabled when the
603 compiler lacks proper support for handling unaligned symbols.
605 config RANDOMIZE_BASE
606 bool "Randomize the address of the kernel image (KASLR)"
609 In support of Kernel Address Space Layout Randomization (KASLR),
610 this randomizes the address at which the kernel image is loaded,
611 as a security feature that deters exploit attempts relying on
612 knowledge of the location of kernel internals.
618 config ARCH_SPARSEMEM_ENABLE
620 select SPARSEMEM_VMEMMAP_ENABLE
621 select SPARSEMEM_VMEMMAP
623 config ARCH_SPARSEMEM_DEFAULT
626 config MAX_PHYSMEM_BITS
627 int "Maximum size of supported physical memory in bits (42-53)"
631 This option specifies the maximum supported size of physical memory
632 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
633 Increasing the number of bits also increases the kernel image size.
634 By default 46 bits (64TB) are supported.
638 depends on !VMAP_STACK
639 prompt "Detect kernel stack overflow"
641 This option enables the compiler option -mstack-guard and
642 -mstack-size if they are available. If the compiler supports them
643 it will emit additional code to each function prolog to trigger
644 an illegal operation if the kernel stack is about to overflow.
646 Say N if you are unsure.
649 int "Size of the guard area (128-1024)"
651 depends on CHECK_STACK
654 This allows you to specify the size of the guard area at the lower
655 end of the kernel stack. If the kernel stack points into the guard
656 area on function entry an illegal operation is triggered. The size
657 needs to be a power of 2. Please keep in mind that the size of an
658 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
659 The minimum size for the stack guard should be 256 for 31 bit and
668 prompt "QDIO support"
670 This driver provides the Queued Direct I/O base support for
673 To compile this driver as a module, choose M here: the
674 module will be called qdio.
680 config PCI_NR_FUNCTIONS
681 int "Maximum number of PCI functions (1-4096)"
685 This allows you to specify the maximum number of PCI functions which
686 this kernel will support.
695 prompt "Support for CHSC subchannels"
697 This driver allows usage of CHSC subchannels. A CHSC subchannel
698 is usually present on LPAR only.
699 The driver creates a device /dev/chsc, which may be used to
700 obtain I/O configuration information about the machine and
701 to issue asynchronous chsc commands (DANGEROUS).
702 You will usually only want to use this interface on a special
703 LPAR designated for system management.
705 To compile this driver as a module, choose M here: the
706 module will be called chsc_sch.
712 prompt "SCM bus driver"
714 Bus driver for Storage Class Memory.
718 prompt "Support for EADM subchannels"
721 This driver allows usage of EADM subchannels. EADM subchannels act
722 as a communication vehicle for SCM increments.
724 To compile this driver as a module, choose M here: the
725 module will be called eadm_sch.
729 prompt "Support for VFIO-CCW subchannels"
733 This driver allows usage of I/O subchannels via VFIO-CCW.
735 To compile this driver as a module, choose M here: the
736 module will be called vfio_ccw.
740 prompt "VFIO support for AP devices"
746 This driver grants access to Adjunct Processor (AP) devices
747 via the VFIO mediated device interface.
749 To compile this driver as a module, choose M here: the module
750 will be called vfio_ap.
759 default (SMC || CCWGROUP)
761 menu "Virtualization"
763 config PROTECTED_VIRTUALIZATION_GUEST
765 prompt "Protected virtualization guest support"
767 Select this option, if you want to be able to run this
768 kernel as a protected virtualization KVM guest.
769 Protected virtualization capable machines have a mini hypervisor
770 located at machine level (an ultravisor). With help of the
771 Ultravisor, KVM will be able to run "protected" VMs, special
772 VMs whose memory and management data are unavailable to KVM.
776 prompt "Pseudo page fault support"
778 Select this option, if you want to use PFAULT pseudo page fault
779 handling under VM. If running native or in LPAR, this option
780 has no effect. If your VM does not support PFAULT, PAGEEX
781 pseudo page fault handling will be used.
782 Note that VM 4.2 supports PFAULT but has a bug in its
783 implementation that causes some problems.
784 Everybody who wants to run Linux under VM != VM4.2 should select
789 prompt "Cooperative memory management"
791 Select this option, if you want to enable the kernel interface
792 to reduce the memory size of the system. This is accomplished
793 by allocating pages of memory and put them "on hold". This only
794 makes sense for a system running under VM where the unused pages
795 will be reused by VM for other guest systems. The interface
796 allows an external monitor to balance memory of many systems.
797 Everybody who wants to run Linux under VM should select this
802 prompt "IUCV special message interface to cooperative memory management"
803 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
805 Select this option to enable the special message interface to
806 the cooperative memory management.
810 prompt "Linux - VM Monitor Stream, base infrastructure"
811 depends on PROC_SYSCTL
813 This provides a kernel interface for creating and updating z/VM APPLDATA
814 monitor records. The monitor records are updated at certain time
815 intervals, once the timer is started.
816 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
817 i.e. enables or disables monitoring on the Linux side.
818 A custom interval value (in seconds) can be written to
819 /proc/appldata/interval.
821 Defaults are 60 seconds interval and timer off.
822 The /proc entries can also be read from, showing the current settings.
826 prompt "Monitor memory management statistics"
827 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
829 This provides memory management related data to the Linux - VM Monitor
830 Stream, like paging/swapping rate, memory utilisation, etc.
831 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
832 APPLDATA monitor record, i.e. enables or disables monitoring this record
836 The /proc entry can also be read from, showing the current settings.
838 This can also be compiled as a module, which will be called
843 prompt "Monitor OS statistics"
844 depends on APPLDATA_BASE
846 This provides OS related data to the Linux - VM Monitor Stream, like
847 CPU utilisation, etc.
848 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
849 APPLDATA monitor record, i.e. enables or disables monitoring this record
853 This can also be compiled as a module, which will be called
856 config APPLDATA_NET_SUM
858 prompt "Monitor overall network statistics"
859 depends on APPLDATA_BASE && NET
861 This provides network related data to the Linux - VM Monitor Stream,
862 currently there is only a total sum of network I/O statistics, no
864 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
865 APPLDATA monitor record, i.e. enables or disables monitoring this record
869 This can also be compiled as a module, which will be called
874 prompt "s390 hypervisor information"
876 This provides several binary files at (debugfs)/s390_hypfs/ to
877 provide accounting information in an s390 hypervisor environment.
881 prompt "s390 hypervisor file system support"
882 select SYS_HYPERVISOR
883 depends on S390_HYPFS
885 This is a virtual file system intended to provide accounting
886 information in an s390 hypervisor environment. This file system
887 is deprecated and should not be used.
889 Say N if you are unsure.
891 source "arch/s390/kvm/Kconfig"
895 prompt "s390 support for virtio devices"
897 select VIRTUALIZATION
900 Enabling this option adds support for virtio based paravirtual device
903 Select this option if you want to run the kernel as a guest under
908 config S390_MODULES_SANITY_TEST_HELPERS
913 config S390_UNWIND_SELFTEST
916 default KUNIT_ALL_TESTS
917 prompt "Test unwind functions"
919 This option enables s390 specific stack unwinder testing kernel
920 module. This option is not useful for distributions or general
921 kernels, but only for kernel developers working on architecture code.
923 Say N if you are unsure.
925 config S390_KPROBES_SANITY_TEST
927 prompt "Enable s390 specific kprobes tests"
931 This option enables an s390 specific kprobes test module. This option
932 is not useful for distributions or general kernels, but only for kernel
933 developers working on architecture code.
935 Say N if you are unsure.
937 config S390_MODULES_SANITY_TEST
940 default KUNIT_ALL_TESTS
941 prompt "Enable s390 specific modules tests"
942 select S390_MODULES_SANITY_TEST_HELPERS
944 This option enables an s390 specific modules test. This option is
945 not useful for distributions or general kernels, but only for
946 kernel developers working on architecture code.
948 Say N if you are unsure.