1 # SPDX-License-Identifier: GPL-2.0
11 config LOCKDEP_SUPPORT
14 config STACKTRACE_SUPPORT
17 config ARCH_HAS_ILOG2_U32
20 config ARCH_HAS_ILOG2_U64
23 config GENERIC_HWEIGHT
29 config GENERIC_BUG_RELATIVE_POINTERS
32 config GENERIC_LOCKBREAK
33 def_bool y if PREEMPTTION
38 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
50 config ARCH_SUPPORTS_UPROBES
53 config KASAN_SHADOW_OFFSET
56 default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING
61 select ARCH_BINFMT_ELF_STATE
62 select ARCH_HAS_DEVMEM_IS_ALLOWED
63 select ARCH_HAS_ELF_RANDOMIZE
64 select ARCH_HAS_FORTIFY_SOURCE
65 select ARCH_HAS_GCOV_PROFILE_ALL
66 select ARCH_HAS_GIGANTIC_PAGE
68 select ARCH_HAS_MEM_ENCRYPT
69 select ARCH_HAS_PTE_SPECIAL
70 select ARCH_HAS_SET_MEMORY
71 select ARCH_HAS_STRICT_KERNEL_RWX
72 select ARCH_HAS_STRICT_MODULE_RWX
73 select ARCH_HAS_SYSCALL_WRAPPER
74 select ARCH_HAS_UBSAN_SANITIZE_ALL
75 select ARCH_HAVE_NMI_SAFE_CMPXCHG
76 select ARCH_INLINE_READ_LOCK
77 select ARCH_INLINE_READ_LOCK_BH
78 select ARCH_INLINE_READ_LOCK_IRQ
79 select ARCH_INLINE_READ_LOCK_IRQSAVE
80 select ARCH_INLINE_READ_TRYLOCK
81 select ARCH_INLINE_READ_UNLOCK
82 select ARCH_INLINE_READ_UNLOCK_BH
83 select ARCH_INLINE_READ_UNLOCK_IRQ
84 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
85 select ARCH_INLINE_SPIN_LOCK
86 select ARCH_INLINE_SPIN_LOCK_BH
87 select ARCH_INLINE_SPIN_LOCK_IRQ
88 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
89 select ARCH_INLINE_SPIN_TRYLOCK
90 select ARCH_INLINE_SPIN_TRYLOCK_BH
91 select ARCH_INLINE_SPIN_UNLOCK
92 select ARCH_INLINE_SPIN_UNLOCK_BH
93 select ARCH_INLINE_SPIN_UNLOCK_IRQ
94 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
95 select ARCH_INLINE_WRITE_LOCK
96 select ARCH_INLINE_WRITE_LOCK_BH
97 select ARCH_INLINE_WRITE_LOCK_IRQ
98 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
99 select ARCH_INLINE_WRITE_TRYLOCK
100 select ARCH_INLINE_WRITE_UNLOCK
101 select ARCH_INLINE_WRITE_UNLOCK_BH
102 select ARCH_INLINE_WRITE_UNLOCK_IRQ
103 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
104 select ARCH_KEEP_MEMBLOCK
105 select ARCH_STACKWALK
106 select ARCH_SUPPORTS_ATOMIC_RMW
107 select ARCH_SUPPORTS_NUMA_BALANCING
108 select ARCH_USE_BUILTIN_BSWAP
109 select ARCH_USE_CMPXCHG_LOCKREF
110 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
111 select ARCH_WANT_DEFAULT_BPF_JIT
112 select ARCH_WANT_IPC_PARSE_VERSION
113 select BUILDTIME_TABLE_SORT
114 select CLONE_BACKWARDS2
115 select DYNAMIC_FTRACE if FUNCTION_TRACER
116 select GENERIC_CLOCKEVENTS
117 select GENERIC_CPU_AUTOPROBE
118 select GENERIC_CPU_VULNERABILITIES
119 select GENERIC_FIND_FIRST_BIT
120 select GENERIC_SMP_IDLE_THREAD
121 select GENERIC_TIME_VSYSCALL
122 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
123 select HAVE_ARCH_AUDITSYSCALL
124 select HAVE_ARCH_JUMP_LABEL
125 select HAVE_ARCH_JUMP_LABEL_RELATIVE
126 select HAVE_ARCH_KASAN
127 select HAVE_ARCH_KASAN_VMALLOC
128 select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
129 select HAVE_ARCH_SECCOMP_FILTER
130 select HAVE_ARCH_SOFT_DIRTY
131 select HAVE_ARCH_TRACEHOOK
132 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
133 select HAVE_ARCH_VMAP_STACK
134 select HAVE_ASM_MODVERSIONS
135 select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
136 select HAVE_CMPXCHG_DOUBLE
137 select HAVE_CMPXCHG_LOCAL
138 select HAVE_COPY_THREAD_TLS
139 select HAVE_DEBUG_KMEMLEAK
140 select HAVE_DMA_CONTIGUOUS
141 select HAVE_DYNAMIC_FTRACE
142 select HAVE_DYNAMIC_FTRACE_WITH_REGS
144 select HAVE_EFFICIENT_UNALIGNED_ACCESS
146 select HAVE_FTRACE_MCOUNT_RECORD
147 select HAVE_FUNCTION_GRAPH_TRACER
148 select HAVE_FUNCTION_TRACER
149 select HAVE_FUTEX_CMPXCHG if FUTEX
150 select HAVE_GCC_PLUGINS
151 select HAVE_KERNEL_BZIP2
152 select HAVE_KERNEL_GZIP
153 select HAVE_KERNEL_LZ4
154 select HAVE_KERNEL_LZMA
155 select HAVE_KERNEL_LZO
156 select HAVE_KERNEL_UNCOMPRESSED
157 select HAVE_KERNEL_XZ
159 select HAVE_KPROBES_ON_FTRACE
160 select HAVE_KRETPROBES
162 select HAVE_LIVEPATCH
163 select HAVE_PERF_REGS
164 select HAVE_PERF_USER_STACK_DUMP
165 select HAVE_MEMBLOCK_PHYS_MAP
166 select MMU_GATHER_NO_GATHER
167 select HAVE_MOD_ARCH_SPECIFIC
168 select HAVE_NOP_MCOUNT
171 select HAVE_PERF_EVENTS
172 select MMU_GATHER_RCU_TABLE_FREE
173 select HAVE_REGS_AND_STACK_ACCESS_API
174 select HAVE_RELIABLE_STACKTRACE
176 select HAVE_SYSCALL_TRACEPOINTS
177 select HAVE_VIRT_CPU_ACCOUNTING
178 select IOMMU_HELPER if PCI
179 select IOMMU_SUPPORT if PCI
180 select MODULES_USE_ELF_RELA
181 select NEED_DMA_MAP_STATE if PCI
182 select NEED_SG_DMA_LENGTH if PCI
184 select OLD_SIGSUSPEND3
185 select PCI_DOMAINS if PCI
186 select PCI_MSI if PCI
188 select SYSCTL_EXCEPTION_TRACE
189 select THREAD_INFO_IN_TASK
191 select VIRT_CPU_ACCOUNTING
192 select ARCH_HAS_SCALED_CPUTIME
194 select ARCH_HAS_FORCE_DMA_UNENCRYPTED
196 select GENERIC_ALLOCATOR
197 imply IMA_SECURE_AND_OR_TRUSTED_BOOT
200 config SCHED_OMIT_FRAME_POINTER
203 config PGTABLE_LEVELS
207 source "kernel/livepatch/Kconfig"
209 menu "Processor type and features"
211 config HAVE_MARCH_Z900_FEATURES
214 config HAVE_MARCH_Z990_FEATURES
216 select HAVE_MARCH_Z900_FEATURES
218 config HAVE_MARCH_Z9_109_FEATURES
220 select HAVE_MARCH_Z990_FEATURES
222 config HAVE_MARCH_Z10_FEATURES
224 select HAVE_MARCH_Z9_109_FEATURES
226 config HAVE_MARCH_Z196_FEATURES
228 select HAVE_MARCH_Z10_FEATURES
230 config HAVE_MARCH_ZEC12_FEATURES
232 select HAVE_MARCH_Z196_FEATURES
234 config HAVE_MARCH_Z13_FEATURES
236 select HAVE_MARCH_ZEC12_FEATURES
238 config HAVE_MARCH_Z14_FEATURES
240 select HAVE_MARCH_Z13_FEATURES
242 config HAVE_MARCH_Z15_FEATURES
244 select HAVE_MARCH_Z14_FEATURES
247 prompt "Processor type"
251 bool "IBM zSeries model z800 and z900"
252 select HAVE_MARCH_Z900_FEATURES
253 depends on $(cc-option,-march=z900)
255 Select this to enable optimizations for model z800/z900 (2064 and
256 2066 series). This will enable some optimizations that are not
257 available on older ESA/390 (31 Bit) only CPUs.
260 bool "IBM zSeries model z890 and z990"
261 select HAVE_MARCH_Z990_FEATURES
262 depends on $(cc-option,-march=z990)
264 Select this to enable optimizations for model z890/z990 (2084 and
265 2086 series). The kernel will be slightly faster but will not work
270 select HAVE_MARCH_Z9_109_FEATURES
271 depends on $(cc-option,-march=z9-109)
273 Select this to enable optimizations for IBM System z9 (2094 and
274 2096 series). The kernel will be slightly faster but will not work
278 bool "IBM System z10"
279 select HAVE_MARCH_Z10_FEATURES
280 depends on $(cc-option,-march=z10)
282 Select this to enable optimizations for IBM System z10 (2097 and
283 2098 series). The kernel will be slightly faster but will not work
287 bool "IBM zEnterprise 114 and 196"
288 select HAVE_MARCH_Z196_FEATURES
289 depends on $(cc-option,-march=z196)
291 Select this to enable optimizations for IBM zEnterprise 114 and 196
292 (2818 and 2817 series). The kernel will be slightly faster but will
293 not work on older machines.
296 bool "IBM zBC12 and zEC12"
297 select HAVE_MARCH_ZEC12_FEATURES
298 depends on $(cc-option,-march=zEC12)
300 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
301 2827 series). The kernel will be slightly faster but will not work on
305 bool "IBM z13s and z13"
306 select HAVE_MARCH_Z13_FEATURES
307 depends on $(cc-option,-march=z13)
309 Select this to enable optimizations for IBM z13s and z13 (2965 and
310 2964 series). The kernel will be slightly faster but will not work on
314 bool "IBM z14 ZR1 and z14"
315 select HAVE_MARCH_Z14_FEATURES
316 depends on $(cc-option,-march=z14)
318 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
319 and 3906 series). The kernel will be slightly faster but will not
320 work on older machines.
324 select HAVE_MARCH_Z15_FEATURES
325 depends on $(cc-option,-march=z15)
327 Select this to enable optimizations for IBM z15 (8562
328 and 8561 series). The kernel will be slightly faster but will not
329 work on older machines.
333 config MARCH_Z900_TUNE
334 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
336 config MARCH_Z990_TUNE
337 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
339 config MARCH_Z9_109_TUNE
340 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
342 config MARCH_Z10_TUNE
343 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
345 config MARCH_Z196_TUNE
346 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
348 config MARCH_ZEC12_TUNE
349 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
351 config MARCH_Z13_TUNE
352 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
354 config MARCH_Z14_TUNE
355 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
357 config MARCH_Z15_TUNE
358 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
361 prompt "Tune code generation"
364 Cause the compiler to tune (-mtune) the generated code for a machine.
365 This will make the code run faster on the selected machine but
366 somewhat slower on other machines.
367 This option only changes how the compiler emits instructions, not the
368 selection of instructions itself, so the resulting kernel will run on
374 Tune the generated code for the target processor for which the kernel
378 bool "IBM zSeries model z800 and z900"
379 depends on $(cc-option,-mtune=z900)
382 bool "IBM zSeries model z890 and z990"
383 depends on $(cc-option,-mtune=z990)
387 depends on $(cc-option,-mtune=z9-109)
390 bool "IBM System z10"
391 depends on $(cc-option,-mtune=z10)
394 bool "IBM zEnterprise 114 and 196"
395 depends on $(cc-option,-mtune=z196)
398 bool "IBM zBC12 and zEC12"
399 depends on $(cc-option,-mtune=zEC12)
402 bool "IBM z13s and z13"
403 depends on $(cc-option,-mtune=z13)
406 bool "IBM z14 ZR1 and z14"
407 depends on $(cc-option,-mtune=z14)
411 depends on $(cc-option,-mtune=z15)
420 prompt "Kernel support for 31 bit emulation"
421 select COMPAT_BINFMT_ELF if BINFMT_ELF
422 select ARCH_WANT_OLD_COMPAT_IPC
423 select COMPAT_OLD_SIGACTION
427 Select this option if you want to enable your system kernel to
428 handle system-calls from ELF binaries for 31 bit ESA. This option
429 (and some other stuff like libraries and such) is needed for
430 executing 31 bit applications. It is safe to say "Y".
432 config SYSVIPC_COMPAT
433 def_bool y if COMPAT && SYSVIPC
439 int "Maximum number of CPUs (2-512)"
443 This allows you to specify the maximum number of CPUs which this
444 kernel will support. The maximum supported value is 512 and the
445 minimum value which makes sense is 2.
447 This is purely to save memory - each supported CPU adds
448 approximately sixteen kilobytes to the kernel image.
455 depends on SCHED_TOPOLOGY
460 This option adds NUMA support to the kernel.
478 config SCHED_TOPOLOGY
480 prompt "Topology scheduler support"
486 Topology scheduler support improves the CPU scheduler's decision
487 making when dealing with machines that have multi-threading,
488 multiple cores or multiple books.
490 source "kernel/Kconfig.hz"
497 bool "kexec file based system call"
501 depends on CRYPTO_SHA256
502 depends on CRYPTO_SHA256_S390
504 Enable the kexec file based system call. In contrast to the normal
505 kexec system call this system call takes file descriptors for the
506 kernel and initramfs as arguments.
508 config ARCH_HAS_KEXEC_PURGATORY
510 depends on KEXEC_FILE
513 bool "Verify kernel signature during kexec_file_load() syscall"
514 depends on KEXEC_FILE && MODULE_SIG_FORMAT
516 This option makes kernel signature verification mandatory for
517 the kexec_file_load() syscall.
519 In addition to that option, you need to enable signature
520 verification for the corresponding kernel image type being
521 loaded in order for this to work.
525 prompt "s390 architectural random number generation API"
527 Enable the s390 architectural random number generation API
528 to provide random data for all consumers within the Linux
531 When enabled the arch_random_* functions declared in linux/random.h
532 are implemented. The implementation is based on the s390 CPACF
533 instruction subfunction TRNG which provides a real true random
540 prompt "Enable modified branch prediction for the kernel by default"
542 If this option is selected the kernel will switch to a modified
543 branch prediction mode if the firmware interface is available.
544 The modified branch prediction mode improves the behaviour in
545 regard to speculative execution.
547 With the option enabled the kernel parameter "nobp=0" or "nospec"
548 can be used to run the kernel in the normal branch prediction mode.
550 With the option disabled the modified branch prediction mode is
551 enabled with the "nobp=1" kernel parameter.
557 prompt "Avoid speculative indirect branches in the kernel"
559 Compile the kernel with the expoline compiler options to guard
560 against kernel-to-user data leaks by avoiding speculative indirect
562 Requires a compiler with -mindirect-branch=thunk support for full
563 protection. The kernel may run slower.
568 prompt "Expoline default"
570 default EXPOLINE_FULL
573 bool "spectre_v2=off"
576 bool "spectre_v2=auto"
584 bool "Build a relocatable kernel"
585 select MODULE_REL_CRCS if MODVERSIONS
588 This builds a kernel image that retains relocation information
589 so it can be loaded at an arbitrary address.
590 The kernel is linked as a position-independent executable (PIE)
591 and contains dynamic relocations which are processed early in the
593 The relocations make the kernel image about 15% larger (compressed
594 10%), but are discarded at runtime.
596 config RANDOMIZE_BASE
597 bool "Randomize the address of the kernel image (KASLR)"
598 depends on RELOCATABLE
601 In support of Kernel Address Space Layout Randomization (KASLR),
602 this randomizes the address at which the kernel image is loaded,
603 as a security feature that deters exploit attempts relying on
604 knowledge of the location of kernel internals.
610 config ARCH_SPARSEMEM_ENABLE
612 select SPARSEMEM_VMEMMAP_ENABLE
613 select SPARSEMEM_VMEMMAP
615 config ARCH_SPARSEMEM_DEFAULT
618 config ARCH_ENABLE_MEMORY_HOTPLUG
619 def_bool y if SPARSEMEM
621 config ARCH_ENABLE_MEMORY_HOTREMOVE
624 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
627 config FORCE_MAX_ZONEORDER
631 config MAX_PHYSMEM_BITS
632 int "Maximum size of supported physical memory in bits (42-53)"
636 This option specifies the maximum supported size of physical memory
637 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
638 Increasing the number of bits also increases the kernel image size.
639 By default 46 bits (64TB) are supported.
643 prompt "Pack kernel stack"
645 This option enables the compiler option -mkernel-backchain if it
646 is available. If the option is available the compiler supports
647 the new stack layout which dramatically reduces the minimum stack
648 frame size. With an old compiler a non-leaf function needs a
649 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
650 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
651 and 24 byte on 64 bit.
653 Say Y if you are unsure.
657 depends on !VMAP_STACK
658 prompt "Detect kernel stack overflow"
660 This option enables the compiler option -mstack-guard and
661 -mstack-size if they are available. If the compiler supports them
662 it will emit additional code to each function prolog to trigger
663 an illegal operation if the kernel stack is about to overflow.
665 Say N if you are unsure.
668 int "Size of the guard area (128-1024)"
670 depends on CHECK_STACK
673 This allows you to specify the size of the guard area at the lower
674 end of the kernel stack. If the kernel stack points into the guard
675 area on function entry an illegal operation is triggered. The size
676 needs to be a power of 2. Please keep in mind that the size of an
677 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
678 The minimum size for the stack guard should be 256 for 31 bit and
681 config WARN_DYNAMIC_STACK
683 prompt "Emit compiler warnings for function with dynamic stack usage"
685 This option enables the compiler option -mwarn-dynamicstack. If the
686 compiler supports this options generates warnings for functions
687 that dynamically allocate stack space using alloca.
689 Say N if you are unsure.
697 prompt "QDIO support"
699 This driver provides the Queued Direct I/O base support for
702 To compile this driver as a module, choose M here: the
703 module will be called qdio.
709 config PCI_NR_FUNCTIONS
710 int "Maximum number of PCI functions (1-4096)"
714 This allows you to specify the maximum number of PCI functions which
715 this kernel will support.
724 prompt "Support for CHSC subchannels"
726 This driver allows usage of CHSC subchannels. A CHSC subchannel
727 is usually present on LPAR only.
728 The driver creates a device /dev/chsc, which may be used to
729 obtain I/O configuration information about the machine and
730 to issue asynchronous chsc commands (DANGEROUS).
731 You will usually only want to use this interface on a special
732 LPAR designated for system management.
734 To compile this driver as a module, choose M here: the
735 module will be called chsc_sch.
741 prompt "SCM bus driver"
743 Bus driver for Storage Class Memory.
747 prompt "Support for EADM subchannels"
750 This driver allows usage of EADM subchannels. EADM subchannels act
751 as a communication vehicle for SCM increments.
753 To compile this driver as a module, choose M here: the
754 module will be called eadm_sch.
758 prompt "Support for VFIO-CCW subchannels"
759 depends on S390_CCW_IOMMU && VFIO_MDEV
761 This driver allows usage of I/O subchannels via VFIO-CCW.
763 To compile this driver as a module, choose M here: the
764 module will be called vfio_ccw.
768 prompt "VFIO support for AP devices"
769 depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
771 This driver grants access to Adjunct Processor (AP) devices
772 via the VFIO mediated device interface.
774 To compile this driver as a module, choose M here: the module
775 will be called vfio_ap.
782 bool "kernel crash dumps"
785 Generate crash dump after being started by kexec.
786 Crash dump kernels are loaded in the main kernel with kexec-tools
787 into a specially reserved region and then later executed after
788 a crash by kdump/kexec.
789 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
790 This option also enables s390 zfcpdump.
791 See also <file:Documentation/s390/zfcpdump.rst>
797 prompt "Enable seccomp to safely compute untrusted bytecode"
800 This kernel feature is useful for number crunching applications
801 that may need to compute untrusted bytecode during their
802 execution. By using pipes or other transports made available to
803 the process as file descriptors supporting the read/write
804 syscalls, it's possible to isolate those applications in
805 their own address space using seccomp. Once seccomp is
806 enabled via /proc/<pid>/seccomp, it cannot be disabled
807 and the task is only allowed to execute a few safe syscalls
808 defined by each seccomp mode.
817 default (SMC || CCWGROUP)
819 menu "Virtualization"
821 config PROTECTED_VIRTUALIZATION_GUEST
823 prompt "Protected virtualization guest support"
825 Select this option, if you want to be able to run this
826 kernel as a protected virtualization KVM guest.
827 Protected virtualization capable machines have a mini hypervisor
828 located at machine level (an ultravisor). With help of the
829 Ultravisor, KVM will be able to run "protected" VMs, special
830 VMs whose memory and management data are unavailable to KVM.
834 prompt "Pseudo page fault support"
836 Select this option, if you want to use PFAULT pseudo page fault
837 handling under VM. If running native or in LPAR, this option
838 has no effect. If your VM does not support PFAULT, PAGEEX
839 pseudo page fault handling will be used.
840 Note that VM 4.2 supports PFAULT but has a bug in its
841 implementation that causes some problems.
842 Everybody who wants to run Linux under VM != VM4.2 should select
847 prompt "Cooperative memory management"
849 Select this option, if you want to enable the kernel interface
850 to reduce the memory size of the system. This is accomplished
851 by allocating pages of memory and put them "on hold". This only
852 makes sense for a system running under VM where the unused pages
853 will be reused by VM for other guest systems. The interface
854 allows an external monitor to balance memory of many systems.
855 Everybody who wants to run Linux under VM should select this
860 prompt "IUCV special message interface to cooperative memory management"
861 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
863 Select this option to enable the special message interface to
864 the cooperative memory management.
868 prompt "Linux - VM Monitor Stream, base infrastructure"
871 This provides a kernel interface for creating and updating z/VM APPLDATA
872 monitor records. The monitor records are updated at certain time
873 intervals, once the timer is started.
874 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
875 i.e. enables or disables monitoring on the Linux side.
876 A custom interval value (in seconds) can be written to
877 /proc/appldata/interval.
879 Defaults are 60 seconds interval and timer off.
880 The /proc entries can also be read from, showing the current settings.
884 prompt "Monitor memory management statistics"
885 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
887 This provides memory management related data to the Linux - VM Monitor
888 Stream, like paging/swapping rate, memory utilisation, etc.
889 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
890 APPLDATA monitor record, i.e. enables or disables monitoring this record
894 The /proc entry can also be read from, showing the current settings.
896 This can also be compiled as a module, which will be called
901 prompt "Monitor OS statistics"
902 depends on APPLDATA_BASE
904 This provides OS related data to the Linux - VM Monitor Stream, like
905 CPU utilisation, etc.
906 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
907 APPLDATA monitor record, i.e. enables or disables monitoring this record
911 This can also be compiled as a module, which will be called
914 config APPLDATA_NET_SUM
916 prompt "Monitor overall network statistics"
917 depends on APPLDATA_BASE && NET
919 This provides network related data to the Linux - VM Monitor Stream,
920 currently there is only a total sum of network I/O statistics, no
922 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
923 APPLDATA monitor record, i.e. enables or disables monitoring this record
927 This can also be compiled as a module, which will be called
932 prompt "s390 hypervisor file system support"
933 select SYS_HYPERVISOR
935 This is a virtual file system intended to provide accounting
936 information in an s390 hypervisor environment.
938 source "arch/s390/kvm/Kconfig"
942 prompt "s390 support for virtio devices"
944 select VIRTUALIZATION
947 Enabling this option adds support for virtio based paravirtual device
950 Select this option if you want to run the kernel as a guest under
957 config S390_UNWIND_SELFTEST
959 prompt "Test unwind functions"
961 This option enables s390 specific stack unwinder testing kernel
962 module. This option is not useful for distributions or general
963 kernels, but only for kernel developers working on architecture code.
965 Say N if you are unsure.