1 # SPDX-License-Identifier: GPL-2.0
2 config ARCH_HAS_MEM_ENCRYPT
14 config LOCKDEP_SUPPORT
17 config STACKTRACE_SUPPORT
20 config ARCH_HAS_ILOG2_U32
23 config ARCH_HAS_ILOG2_U64
26 config GENERIC_HWEIGHT
32 config GENERIC_BUG_RELATIVE_POINTERS
35 config GENERIC_LOCKBREAK
41 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
53 config ARCH_SUPPORTS_UPROBES
56 config KASAN_SHADOW_OFFSET
59 default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING
64 select ARCH_BINFMT_ELF_STATE
65 select ARCH_HAS_DEVMEM_IS_ALLOWED
66 select ARCH_HAS_ELF_RANDOMIZE
67 select ARCH_HAS_FORTIFY_SOURCE
68 select ARCH_HAS_GCOV_PROFILE_ALL
69 select ARCH_HAS_GIGANTIC_PAGE
71 select ARCH_HAS_PTE_SPECIAL
72 select ARCH_HAS_SET_MEMORY
73 select ARCH_HAS_STRICT_KERNEL_RWX
74 select ARCH_HAS_STRICT_MODULE_RWX
75 select ARCH_HAS_SYSCALL_WRAPPER
76 select ARCH_HAS_UBSAN_SANITIZE_ALL
77 select ARCH_HAVE_NMI_SAFE_CMPXCHG
78 select ARCH_INLINE_READ_LOCK
79 select ARCH_INLINE_READ_LOCK_BH
80 select ARCH_INLINE_READ_LOCK_IRQ
81 select ARCH_INLINE_READ_LOCK_IRQSAVE
82 select ARCH_INLINE_READ_TRYLOCK
83 select ARCH_INLINE_READ_UNLOCK
84 select ARCH_INLINE_READ_UNLOCK_BH
85 select ARCH_INLINE_READ_UNLOCK_IRQ
86 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
87 select ARCH_INLINE_SPIN_LOCK
88 select ARCH_INLINE_SPIN_LOCK_BH
89 select ARCH_INLINE_SPIN_LOCK_IRQ
90 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
91 select ARCH_INLINE_SPIN_TRYLOCK
92 select ARCH_INLINE_SPIN_TRYLOCK_BH
93 select ARCH_INLINE_SPIN_UNLOCK
94 select ARCH_INLINE_SPIN_UNLOCK_BH
95 select ARCH_INLINE_SPIN_UNLOCK_IRQ
96 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
97 select ARCH_INLINE_WRITE_LOCK
98 select ARCH_INLINE_WRITE_LOCK_BH
99 select ARCH_INLINE_WRITE_LOCK_IRQ
100 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
101 select ARCH_INLINE_WRITE_TRYLOCK
102 select ARCH_INLINE_WRITE_UNLOCK
103 select ARCH_INLINE_WRITE_UNLOCK_BH
104 select ARCH_INLINE_WRITE_UNLOCK_IRQ
105 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
106 select ARCH_KEEP_MEMBLOCK
107 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
108 select ARCH_SUPPORTS_ATOMIC_RMW
109 select ARCH_SUPPORTS_NUMA_BALANCING
110 select ARCH_USE_BUILTIN_BSWAP
111 select ARCH_USE_CMPXCHG_LOCKREF
112 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
113 select ARCH_WANT_IPC_PARSE_VERSION
114 select BUILDTIME_EXTABLE_SORT
115 select CLONE_BACKWARDS2
116 select DYNAMIC_FTRACE if FUNCTION_TRACER
117 select GENERIC_CLOCKEVENTS
118 select GENERIC_CPU_AUTOPROBE
119 select GENERIC_CPU_VULNERABILITIES
120 select GENERIC_FIND_FIRST_BIT
121 select GENERIC_SMP_IDLE_THREAD
122 select GENERIC_TIME_VSYSCALL
123 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
124 select HAVE_ARCH_AUDITSYSCALL
125 select HAVE_ARCH_JUMP_LABEL
126 select HAVE_ARCH_JUMP_LABEL_RELATIVE
127 select HAVE_ARCH_KASAN
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_KRETPROBES
161 select HAVE_LIVEPATCH
162 select HAVE_PERF_REGS
163 select HAVE_PERF_USER_STACK_DUMP
164 select HAVE_MEMBLOCK_NODE_MAP
165 select HAVE_MEMBLOCK_PHYS_MAP
166 select HAVE_MMU_GATHER_NO_GATHER
167 select HAVE_MOD_ARCH_SPECIFIC
168 select HAVE_NOP_MCOUNT
171 select HAVE_PERF_EVENTS
172 select HAVE_RCU_TABLE_FREE
173 select HAVE_REGS_AND_STACK_ACCESS_API
175 select HAVE_SYSCALL_TRACEPOINTS
176 select HAVE_VIRT_CPU_ACCOUNTING
177 select IOMMU_HELPER if PCI
178 select IOMMU_SUPPORT if PCI
179 select MODULES_USE_ELF_RELA
180 select NEED_DMA_MAP_STATE if PCI
181 select NEED_SG_DMA_LENGTH if PCI
183 select OLD_SIGSUSPEND3
184 select PCI_DOMAINS if PCI
185 select PCI_MSI if PCI
187 select SYSCTL_EXCEPTION_TRACE
188 select THREAD_INFO_IN_TASK
190 select VIRT_CPU_ACCOUNTING
191 select ARCH_HAS_SCALED_CPUTIME
193 select ARCH_HAS_FORCE_DMA_UNENCRYPTED
195 select GENERIC_ALLOCATOR
198 config SCHED_OMIT_FRAME_POINTER
201 config PGTABLE_LEVELS
205 source "kernel/livepatch/Kconfig"
207 menu "Processor type and features"
209 config HAVE_MARCH_Z900_FEATURES
212 config HAVE_MARCH_Z990_FEATURES
214 select HAVE_MARCH_Z900_FEATURES
216 config HAVE_MARCH_Z9_109_FEATURES
218 select HAVE_MARCH_Z990_FEATURES
220 config HAVE_MARCH_Z10_FEATURES
222 select HAVE_MARCH_Z9_109_FEATURES
224 config HAVE_MARCH_Z196_FEATURES
226 select HAVE_MARCH_Z10_FEATURES
228 config HAVE_MARCH_ZEC12_FEATURES
230 select HAVE_MARCH_Z196_FEATURES
232 config HAVE_MARCH_Z13_FEATURES
234 select HAVE_MARCH_ZEC12_FEATURES
236 config HAVE_MARCH_Z14_FEATURES
238 select HAVE_MARCH_Z13_FEATURES
241 prompt "Processor type"
245 bool "IBM zSeries model z800 and z900"
246 depends on !CC_IS_CLANG
247 select HAVE_MARCH_Z900_FEATURES
249 Select this to enable optimizations for model z800/z900 (2064 and
250 2066 series). This will enable some optimizations that are not
251 available on older ESA/390 (31 Bit) only CPUs.
254 bool "IBM zSeries model z890 and z990"
255 depends on !CC_IS_CLANG
256 select HAVE_MARCH_Z990_FEATURES
258 Select this to enable optimizations for model z890/z990 (2084 and
259 2086 series). The kernel will be slightly faster but will not work
264 depends on !CC_IS_CLANG
265 select HAVE_MARCH_Z9_109_FEATURES
267 Select this to enable optimizations for IBM System z9 (2094 and
268 2096 series). The kernel will be slightly faster but will not work
272 bool "IBM System z10"
273 select HAVE_MARCH_Z10_FEATURES
275 Select this to enable optimizations for IBM System z10 (2097 and
276 2098 series). The kernel will be slightly faster but will not work
280 bool "IBM zEnterprise 114 and 196"
281 select HAVE_MARCH_Z196_FEATURES
283 Select this to enable optimizations for IBM zEnterprise 114 and 196
284 (2818 and 2817 series). The kernel will be slightly faster but will
285 not work on older machines.
288 bool "IBM zBC12 and zEC12"
289 select HAVE_MARCH_ZEC12_FEATURES
291 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
292 2827 series). The kernel will be slightly faster but will not work on
296 bool "IBM z13s and z13"
297 select HAVE_MARCH_Z13_FEATURES
299 Select this to enable optimizations for IBM z13s and z13 (2965 and
300 2964 series). The kernel will be slightly faster but will not work on
304 bool "IBM z14 ZR1 and z14"
305 select HAVE_MARCH_Z14_FEATURES
307 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
308 and 3906 series). The kernel will be slightly faster but will not
309 work on older machines.
313 config MARCH_Z900_TUNE
314 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
316 config MARCH_Z990_TUNE
317 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
319 config MARCH_Z9_109_TUNE
320 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
322 config MARCH_Z10_TUNE
323 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
325 config MARCH_Z196_TUNE
326 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
328 config MARCH_ZEC12_TUNE
329 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
331 config MARCH_Z13_TUNE
332 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
334 config MARCH_Z14_TUNE
335 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
338 prompt "Tune code generation"
341 Cause the compiler to tune (-mtune) the generated code for a machine.
342 This will make the code run faster on the selected machine but
343 somewhat slower on other machines.
344 This option only changes how the compiler emits instructions, not the
345 selection of instructions itself, so the resulting kernel will run on
351 Tune the generated code for the target processor for which the kernel
355 bool "IBM zSeries model z800 and z900"
356 depends on !CC_IS_CLANG
359 bool "IBM zSeries model z890 and z990"
360 depends on !CC_IS_CLANG
364 depends on !CC_IS_CLANG
367 bool "IBM System z10"
370 bool "IBM zEnterprise 114 and 196"
373 bool "IBM zBC12 and zEC12"
388 prompt "Kernel support for 31 bit emulation"
389 select COMPAT_BINFMT_ELF if BINFMT_ELF
390 select ARCH_WANT_OLD_COMPAT_IPC
391 select COMPAT_OLD_SIGACTION
395 Select this option if you want to enable your system kernel to
396 handle system-calls from ELF binaries for 31 bit ESA. This option
397 (and some other stuff like libraries and such) is needed for
398 executing 31 bit applications. It is safe to say "Y".
401 def_bool COMPAT && !CC_IS_CLANG
403 config SYSVIPC_COMPAT
404 def_bool y if COMPAT && SYSVIPC
410 int "Maximum number of CPUs (2-512)"
414 This allows you to specify the maximum number of CPUs which this
415 kernel will support. The maximum supported value is 512 and the
416 minimum value which makes sense is 2.
418 This is purely to save memory - each supported CPU adds
419 approximately sixteen kilobytes to the kernel image.
424 # Some NUMA nodes have memory ranges that span
425 # other nodes. Even though a pfn is valid and
426 # between a node's start and end pfns, it may not
427 # reside on that node. See memmap_init_zone()
428 # for details. <- They meant memory holes!
429 config NODES_SPAN_OTHER_NODES
434 depends on SCHED_TOPOLOGY
439 This option adds NUMA support to the kernel.
441 An operation mode can be selected by appending
442 numa=<method> to the kernel command line.
444 The default behaviour is identical to appending numa=plain to
445 the command line. This will create just one node with all
446 available memory and all CPUs in it.
449 int "Maximum NUMA nodes (as a power of 2)"
454 Specify the maximum number of NUMA nodes available on the target
455 system. Increases memory reserved to accommodate various tables.
457 menu "Select NUMA modes"
461 bool "NUMA emulation"
464 Numa emulation mode will split the available system memory into
465 equal chunks which then are distributed over the configured number
466 of nodes in a round-robin manner.
468 The number of fake nodes is limited by the number of available memory
469 chunks (i.e. memory size / fake size) and the number of supported
472 The CPUs are assigned to the nodes in a way that partially respects
473 the original machine topology (if supported by the machine).
474 Fair distribution of the CPUs is not guaranteed.
477 hex "NUMA emulation memory chunk size"
479 range 0x400000 0x100000000
482 Select the default size by which the memory is chopped and then
483 assigned to emulated NUMA nodes.
485 This can be overridden by specifying
489 on the kernel command line where also suffixes K, M, G, and T are
506 config SCHED_TOPOLOGY
508 prompt "Topology scheduler support"
514 Topology scheduler support improves the CPU scheduler's decision
515 making when dealing with machines that have multi-threading,
516 multiple cores or multiple books.
518 source "kernel/Kconfig.hz"
525 bool "kexec file based system call"
529 depends on CRYPTO_SHA256
530 depends on CRYPTO_SHA256_S390
532 Enable the kexec file based system call. In contrast to the normal
533 kexec system call this system call takes file descriptors for the
534 kernel and initramfs as arguments.
536 config ARCH_HAS_KEXEC_PURGATORY
538 depends on KEXEC_FILE
540 config KEXEC_VERIFY_SIG
541 bool "Verify kernel signature during kexec_file_load() syscall"
542 depends on KEXEC_FILE && SYSTEM_DATA_VERIFICATION
544 This option makes kernel signature verification mandatory for
545 the kexec_file_load() syscall.
547 In addition to that option, you need to enable signature
548 verification for the corresponding kernel image type being
549 loaded in order for this to work.
553 prompt "s390 architectural random number generation API"
555 Enable the s390 architectural random number generation API
556 to provide random data for all consumers within the Linux
559 When enabled the arch_random_* functions declared in linux/random.h
560 are implemented. The implementation is based on the s390 CPACF
561 instruction subfunction TRNG which provides a real true random
568 prompt "Enable modified branch prediction for the kernel by default"
570 If this option is selected the kernel will switch to a modified
571 branch prediction mode if the firmware interface is available.
572 The modified branch prediction mode improves the behaviour in
573 regard to speculative execution.
575 With the option enabled the kernel parameter "nobp=0" or "nospec"
576 can be used to run the kernel in the normal branch prediction mode.
578 With the option disabled the modified branch prediction mode is
579 enabled with the "nobp=1" kernel parameter.
585 prompt "Avoid speculative indirect branches in the kernel"
587 Compile the kernel with the expoline compiler options to guard
588 against kernel-to-user data leaks by avoiding speculative indirect
590 Requires a compiler with -mindirect-branch=thunk support for full
591 protection. The kernel may run slower.
596 prompt "Expoline default"
598 default EXPOLINE_FULL
601 bool "spectre_v2=off"
604 bool "spectre_v2=auto"
612 bool "Build a relocatable kernel"
613 select MODULE_REL_CRCS if MODVERSIONS
616 This builds a kernel image that retains relocation information
617 so it can be loaded at an arbitrary address.
618 The kernel is linked as a position-independent executable (PIE)
619 and contains dynamic relocations which are processed early in the
621 The relocations make the kernel image about 15% larger (compressed
622 10%), but are discarded at runtime.
624 config RANDOMIZE_BASE
625 bool "Randomize the address of the kernel image (KASLR)"
626 depends on RELOCATABLE
629 In support of Kernel Address Space Layout Randomization (KASLR),
630 this randomizes the address at which the kernel image is loaded,
631 as a security feature that deters exploit attempts relying on
632 knowledge of the location of kernel internals.
638 config ARCH_SPARSEMEM_ENABLE
640 select SPARSEMEM_VMEMMAP_ENABLE
641 select SPARSEMEM_VMEMMAP
643 config ARCH_SPARSEMEM_DEFAULT
646 config ARCH_ENABLE_MEMORY_HOTPLUG
647 def_bool y if SPARSEMEM
649 config ARCH_ENABLE_MEMORY_HOTREMOVE
652 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
655 config FORCE_MAX_ZONEORDER
659 config MAX_PHYSMEM_BITS
660 int "Maximum size of supported physical memory in bits (42-53)"
664 This option specifies the maximum supported size of physical memory
665 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
666 Increasing the number of bits also increases the kernel image size.
667 By default 46 bits (64TB) are supported.
671 prompt "Pack kernel stack"
673 This option enables the compiler option -mkernel-backchain if it
674 is available. If the option is available the compiler supports
675 the new stack layout which dramatically reduces the minimum stack
676 frame size. With an old compiler a non-leaf function needs a
677 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
678 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
679 and 24 byte on 64 bit.
681 Say Y if you are unsure.
685 depends on !VMAP_STACK
686 prompt "Detect kernel stack overflow"
688 This option enables the compiler option -mstack-guard and
689 -mstack-size if they are available. If the compiler supports them
690 it will emit additional code to each function prolog to trigger
691 an illegal operation if the kernel stack is about to overflow.
693 Say N if you are unsure.
696 int "Size of the guard area (128-1024)"
698 depends on CHECK_STACK
701 This allows you to specify the size of the guard area at the lower
702 end of the kernel stack. If the kernel stack points into the guard
703 area on function entry an illegal operation is triggered. The size
704 needs to be a power of 2. Please keep in mind that the size of an
705 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
706 The minimum size for the stack guard should be 256 for 31 bit and
709 config WARN_DYNAMIC_STACK
711 prompt "Emit compiler warnings for function with dynamic stack usage"
713 This option enables the compiler option -mwarn-dynamicstack. If the
714 compiler supports this options generates warnings for functions
715 that dynamically allocate stack space using alloca.
717 Say N if you are unsure.
725 prompt "QDIO support"
727 This driver provides the Queued Direct I/O base support for
730 To compile this driver as a module, choose M here: the
731 module will be called qdio.
737 config PCI_NR_FUNCTIONS
738 int "Maximum number of PCI functions (1-4096)"
742 This allows you to specify the maximum number of PCI functions which
743 this kernel will support.
752 prompt "Support for CHSC subchannels"
754 This driver allows usage of CHSC subchannels. A CHSC subchannel
755 is usually present on LPAR only.
756 The driver creates a device /dev/chsc, which may be used to
757 obtain I/O configuration information about the machine and
758 to issue asynchronous chsc commands (DANGEROUS).
759 You will usually only want to use this interface on a special
760 LPAR designated for system management.
762 To compile this driver as a module, choose M here: the
763 module will be called chsc_sch.
769 prompt "SCM bus driver"
771 Bus driver for Storage Class Memory.
775 prompt "Support for EADM subchannels"
778 This driver allows usage of EADM subchannels. EADM subchannels act
779 as a communication vehicle for SCM increments.
781 To compile this driver as a module, choose M here: the
782 module will be called eadm_sch.
786 prompt "Support for VFIO-CCW subchannels"
787 depends on S390_CCW_IOMMU && VFIO_MDEV
789 This driver allows usage of I/O subchannels via VFIO-CCW.
791 To compile this driver as a module, choose M here: the
792 module will be called vfio_ccw.
796 prompt "VFIO support for AP devices"
797 depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
799 This driver grants access to Adjunct Processor (AP) devices
800 via the VFIO mediated device interface.
802 To compile this driver as a module, choose M here: the module
803 will be called vfio_ap.
810 bool "kernel crash dumps"
813 Generate crash dump after being started by kexec.
814 Crash dump kernels are loaded in the main kernel with kexec-tools
815 into a specially reserved region and then later executed after
816 a crash by kdump/kexec.
817 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
818 This option also enables s390 zfcpdump.
819 See also <file:Documentation/s390/zfcpdump.rst>
825 prompt "Enable seccomp to safely compute untrusted bytecode"
828 This kernel feature is useful for number crunching applications
829 that may need to compute untrusted bytecode during their
830 execution. By using pipes or other transports made available to
831 the process as file descriptors supporting the read/write
832 syscalls, it's possible to isolate those applications in
833 their own address space using seccomp. Once seccomp is
834 enabled via /proc/<pid>/seccomp, it cannot be disabled
835 and the task is only allowed to execute a few safe syscalls
836 defined by each seccomp mode.
840 menu "Power Management"
842 config ARCH_HIBERNATION_POSSIBLE
845 source "kernel/power/Kconfig"
854 default (SMC || CCWGROUP)
856 menu "Virtualization"
858 config PROTECTED_VIRTUALIZATION_GUEST
860 prompt "Protected virtualization guest support"
862 Select this option, if you want to be able to run this
863 kernel as a protected virtualization KVM guest.
864 Protected virtualization capable machines have a mini hypervisor
865 located at machine level (an ultravisor). With help of the
866 Ultravisor, KVM will be able to run "protected" VMs, special
867 VMs whose memory and management data are unavailable to KVM.
871 prompt "Pseudo page fault support"
873 Select this option, if you want to use PFAULT pseudo page fault
874 handling under VM. If running native or in LPAR, this option
875 has no effect. If your VM does not support PFAULT, PAGEEX
876 pseudo page fault handling will be used.
877 Note that VM 4.2 supports PFAULT but has a bug in its
878 implementation that causes some problems.
879 Everybody who wants to run Linux under VM != VM4.2 should select
884 prompt "Cooperative memory management"
886 Select this option, if you want to enable the kernel interface
887 to reduce the memory size of the system. This is accomplished
888 by allocating pages of memory and put them "on hold". This only
889 makes sense for a system running under VM where the unused pages
890 will be reused by VM for other guest systems. The interface
891 allows an external monitor to balance memory of many systems.
892 Everybody who wants to run Linux under VM should select this
897 prompt "IUCV special message interface to cooperative memory management"
898 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
900 Select this option to enable the special message interface to
901 the cooperative memory management.
905 prompt "Linux - VM Monitor Stream, base infrastructure"
908 This provides a kernel interface for creating and updating z/VM APPLDATA
909 monitor records. The monitor records are updated at certain time
910 intervals, once the timer is started.
911 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
912 i.e. enables or disables monitoring on the Linux side.
913 A custom interval value (in seconds) can be written to
914 /proc/appldata/interval.
916 Defaults are 60 seconds interval and timer off.
917 The /proc entries can also be read from, showing the current settings.
921 prompt "Monitor memory management statistics"
922 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
924 This provides memory management related data to the Linux - VM Monitor
925 Stream, like paging/swapping rate, memory utilisation, etc.
926 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
927 APPLDATA monitor record, i.e. enables or disables monitoring this record
931 The /proc entry can also be read from, showing the current settings.
933 This can also be compiled as a module, which will be called
938 prompt "Monitor OS statistics"
939 depends on APPLDATA_BASE
941 This provides OS related data to the Linux - VM Monitor Stream, like
942 CPU utilisation, etc.
943 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
944 APPLDATA monitor record, i.e. enables or disables monitoring this record
948 This can also be compiled as a module, which will be called
951 config APPLDATA_NET_SUM
953 prompt "Monitor overall network statistics"
954 depends on APPLDATA_BASE && NET
956 This provides network related data to the Linux - VM Monitor Stream,
957 currently there is only a total sum of network I/O statistics, no
959 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
960 APPLDATA monitor record, i.e. enables or disables monitoring this record
964 This can also be compiled as a module, which will be called
969 prompt "s390 hypervisor file system support"
970 select SYS_HYPERVISOR
972 This is a virtual file system intended to provide accounting
973 information in an s390 hypervisor environment.
975 source "arch/s390/kvm/Kconfig"
979 prompt "s390 support for virtio devices"
981 select VIRTUALIZATION
983 select VIRTIO_CONSOLE
985 Enabling this option adds support for virtio based paravirtual device
988 Select this option if you want to run the kernel as a guest under