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_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
135 select HAVE_CMPXCHG_DOUBLE
136 select HAVE_CMPXCHG_LOCAL
137 select HAVE_COPY_THREAD_TLS
138 select HAVE_DEBUG_KMEMLEAK
139 select HAVE_DMA_CONTIGUOUS
140 select HAVE_DYNAMIC_FTRACE
141 select HAVE_DYNAMIC_FTRACE_WITH_REGS
142 select HAVE_EFFICIENT_UNALIGNED_ACCESS
144 select HAVE_FTRACE_MCOUNT_RECORD
145 select HAVE_FUNCTION_GRAPH_TRACER
146 select HAVE_FUNCTION_TRACER
147 select HAVE_FUTEX_CMPXCHG if FUTEX
148 select HAVE_GCC_PLUGINS
149 select HAVE_GENERIC_GUP
150 select HAVE_KERNEL_BZIP2
151 select HAVE_KERNEL_GZIP
152 select HAVE_KERNEL_LZ4
153 select HAVE_KERNEL_LZMA
154 select HAVE_KERNEL_LZO
155 select HAVE_KERNEL_UNCOMPRESSED
156 select HAVE_KERNEL_XZ
158 select HAVE_KRETPROBES
160 select HAVE_LIVEPATCH
161 select HAVE_PERF_REGS
162 select HAVE_PERF_USER_STACK_DUMP
163 select HAVE_MEMBLOCK_NODE_MAP
164 select HAVE_MEMBLOCK_PHYS_MAP
165 select HAVE_MMU_GATHER_NO_GATHER
166 select HAVE_MOD_ARCH_SPECIFIC
167 select HAVE_NOP_MCOUNT
170 select HAVE_PERF_EVENTS
171 select HAVE_RCU_TABLE_FREE
172 select HAVE_REGS_AND_STACK_ACCESS_API
174 select HAVE_SYSCALL_TRACEPOINTS
175 select HAVE_VIRT_CPU_ACCOUNTING
176 select IOMMU_HELPER if PCI
177 select IOMMU_SUPPORT if PCI
178 select MODULES_USE_ELF_RELA
179 select NEED_DMA_MAP_STATE if PCI
180 select NEED_SG_DMA_LENGTH if PCI
182 select OLD_SIGSUSPEND3
183 select PCI_DOMAINS if PCI
184 select PCI_MSI if PCI
186 select SYSCTL_EXCEPTION_TRACE
187 select THREAD_INFO_IN_TASK
189 select VIRT_CPU_ACCOUNTING
190 select ARCH_HAS_SCALED_CPUTIME
193 select GENERIC_ALLOCATOR
196 config SCHED_OMIT_FRAME_POINTER
199 config PGTABLE_LEVELS
203 source "kernel/livepatch/Kconfig"
205 menu "Processor type and features"
207 config HAVE_MARCH_Z900_FEATURES
210 config HAVE_MARCH_Z990_FEATURES
212 select HAVE_MARCH_Z900_FEATURES
214 config HAVE_MARCH_Z9_109_FEATURES
216 select HAVE_MARCH_Z990_FEATURES
218 config HAVE_MARCH_Z10_FEATURES
220 select HAVE_MARCH_Z9_109_FEATURES
222 config HAVE_MARCH_Z196_FEATURES
224 select HAVE_MARCH_Z10_FEATURES
226 config HAVE_MARCH_ZEC12_FEATURES
228 select HAVE_MARCH_Z196_FEATURES
230 config HAVE_MARCH_Z13_FEATURES
232 select HAVE_MARCH_ZEC12_FEATURES
234 config HAVE_MARCH_Z14_FEATURES
236 select HAVE_MARCH_Z13_FEATURES
239 prompt "Processor type"
243 bool "IBM zSeries model z800 and z900"
244 depends on !CC_IS_CLANG
245 select HAVE_MARCH_Z900_FEATURES
247 Select this to enable optimizations for model z800/z900 (2064 and
248 2066 series). This will enable some optimizations that are not
249 available on older ESA/390 (31 Bit) only CPUs.
252 bool "IBM zSeries model z890 and z990"
253 depends on !CC_IS_CLANG
254 select HAVE_MARCH_Z990_FEATURES
256 Select this to enable optimizations for model z890/z990 (2084 and
257 2086 series). The kernel will be slightly faster but will not work
262 depends on !CC_IS_CLANG
263 select HAVE_MARCH_Z9_109_FEATURES
265 Select this to enable optimizations for IBM System z9 (2094 and
266 2096 series). The kernel will be slightly faster but will not work
270 bool "IBM System z10"
271 select HAVE_MARCH_Z10_FEATURES
273 Select this to enable optimizations for IBM System z10 (2097 and
274 2098 series). The kernel will be slightly faster but will not work
278 bool "IBM zEnterprise 114 and 196"
279 select HAVE_MARCH_Z196_FEATURES
281 Select this to enable optimizations for IBM zEnterprise 114 and 196
282 (2818 and 2817 series). The kernel will be slightly faster but will
283 not work on older machines.
286 bool "IBM zBC12 and zEC12"
287 select HAVE_MARCH_ZEC12_FEATURES
289 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
290 2827 series). The kernel will be slightly faster but will not work on
294 bool "IBM z13s and z13"
295 select HAVE_MARCH_Z13_FEATURES
297 Select this to enable optimizations for IBM z13s and z13 (2965 and
298 2964 series). The kernel will be slightly faster but will not work on
302 bool "IBM z14 ZR1 and z14"
303 select HAVE_MARCH_Z14_FEATURES
305 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
306 and 3906 series). The kernel will be slightly faster but will not
307 work on older machines.
311 config MARCH_Z900_TUNE
312 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
314 config MARCH_Z990_TUNE
315 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
317 config MARCH_Z9_109_TUNE
318 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
320 config MARCH_Z10_TUNE
321 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
323 config MARCH_Z196_TUNE
324 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
326 config MARCH_ZEC12_TUNE
327 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
329 config MARCH_Z13_TUNE
330 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
332 config MARCH_Z14_TUNE
333 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
336 prompt "Tune code generation"
339 Cause the compiler to tune (-mtune) the generated code for a machine.
340 This will make the code run faster on the selected machine but
341 somewhat slower on other machines.
342 This option only changes how the compiler emits instructions, not the
343 selection of instructions itself, so the resulting kernel will run on
349 Tune the generated code for the target processor for which the kernel
353 bool "IBM zSeries model z800 and z900"
354 depends on !CC_IS_CLANG
357 bool "IBM zSeries model z890 and z990"
358 depends on !CC_IS_CLANG
362 depends on !CC_IS_CLANG
365 bool "IBM System z10"
368 bool "IBM zEnterprise 114 and 196"
371 bool "IBM zBC12 and zEC12"
386 prompt "Kernel support for 31 bit emulation"
387 select COMPAT_BINFMT_ELF if BINFMT_ELF
388 select ARCH_WANT_OLD_COMPAT_IPC
389 select COMPAT_OLD_SIGACTION
393 Select this option if you want to enable your system kernel to
394 handle system-calls from ELF binaries for 31 bit ESA. This option
395 (and some other stuff like libraries and such) is needed for
396 executing 31 bit applications. It is safe to say "Y".
399 def_bool COMPAT && !CC_IS_CLANG
401 config SYSVIPC_COMPAT
402 def_bool y if COMPAT && SYSVIPC
408 int "Maximum number of CPUs (2-512)"
412 This allows you to specify the maximum number of CPUs which this
413 kernel will support. The maximum supported value is 512 and the
414 minimum value which makes sense is 2.
416 This is purely to save memory - each supported CPU adds
417 approximately sixteen kilobytes to the kernel image.
422 # Some NUMA nodes have memory ranges that span
423 # other nodes. Even though a pfn is valid and
424 # between a node's start and end pfns, it may not
425 # reside on that node. See memmap_init_zone()
426 # for details. <- They meant memory holes!
427 config NODES_SPAN_OTHER_NODES
432 depends on SCHED_TOPOLOGY
437 This option adds NUMA support to the kernel.
439 An operation mode can be selected by appending
440 numa=<method> to the kernel command line.
442 The default behaviour is identical to appending numa=plain to
443 the command line. This will create just one node with all
444 available memory and all CPUs in it.
447 int "Maximum NUMA nodes (as a power of 2)"
452 Specify the maximum number of NUMA nodes available on the target
453 system. Increases memory reserved to accommodate various tables.
455 menu "Select NUMA modes"
459 bool "NUMA emulation"
462 Numa emulation mode will split the available system memory into
463 equal chunks which then are distributed over the configured number
464 of nodes in a round-robin manner.
466 The number of fake nodes is limited by the number of available memory
467 chunks (i.e. memory size / fake size) and the number of supported
470 The CPUs are assigned to the nodes in a way that partially respects
471 the original machine topology (if supported by the machine).
472 Fair distribution of the CPUs is not guaranteed.
475 hex "NUMA emulation memory chunk size"
477 range 0x400000 0x100000000
480 Select the default size by which the memory is chopped and then
481 assigned to emulated NUMA nodes.
483 This can be overridden by specifying
487 on the kernel command line where also suffixes K, M, G, and T are
504 config SCHED_TOPOLOGY
506 prompt "Topology scheduler support"
512 Topology scheduler support improves the CPU scheduler's decision
513 making when dealing with machines that have multi-threading,
514 multiple cores or multiple books.
516 source "kernel/Kconfig.hz"
523 bool "kexec file based system call"
527 depends on CRYPTO_SHA256
528 depends on CRYPTO_SHA256_S390
530 Enable the kexec file based system call. In contrast to the normal
531 kexec system call this system call takes file descriptors for the
532 kernel and initramfs as arguments.
534 config ARCH_HAS_KEXEC_PURGATORY
536 depends on KEXEC_FILE
538 config KEXEC_VERIFY_SIG
539 bool "Verify kernel signature during kexec_file_load() syscall"
540 depends on KEXEC_FILE && SYSTEM_DATA_VERIFICATION
542 This option makes kernel signature verification mandatory for
543 the kexec_file_load() syscall.
545 In addition to that option, you need to enable signature
546 verification for the corresponding kernel image type being
547 loaded in order for this to work.
551 prompt "s390 architectural random number generation API"
553 Enable the s390 architectural random number generation API
554 to provide random data for all consumers within the Linux
557 When enabled the arch_random_* functions declared in linux/random.h
558 are implemented. The implementation is based on the s390 CPACF
559 instruction subfunction TRNG which provides a real true random
566 prompt "Enable modified branch prediction for the kernel by default"
568 If this option is selected the kernel will switch to a modified
569 branch prediction mode if the firmware interface is available.
570 The modified branch prediction mode improves the behaviour in
571 regard to speculative execution.
573 With the option enabled the kernel parameter "nobp=0" or "nospec"
574 can be used to run the kernel in the normal branch prediction mode.
576 With the option disabled the modified branch prediction mode is
577 enabled with the "nobp=1" kernel parameter.
583 prompt "Avoid speculative indirect branches in the kernel"
585 Compile the kernel with the expoline compiler options to guard
586 against kernel-to-user data leaks by avoiding speculative indirect
588 Requires a compiler with -mindirect-branch=thunk support for full
589 protection. The kernel may run slower.
594 prompt "Expoline default"
596 default EXPOLINE_FULL
599 bool "spectre_v2=off"
602 bool "spectre_v2=auto"
610 bool "Build a relocatable kernel"
611 select MODULE_REL_CRCS if MODVERSIONS
614 This builds a kernel image that retains relocation information
615 so it can be loaded at an arbitrary address.
616 The kernel is linked as a position-independent executable (PIE)
617 and contains dynamic relocations which are processed early in the
619 The relocations make the kernel image about 15% larger (compressed
620 10%), but are discarded at runtime.
622 config RANDOMIZE_BASE
623 bool "Randomize the address of the kernel image (KASLR)"
624 depends on RELOCATABLE
627 In support of Kernel Address Space Layout Randomization (KASLR),
628 this randomizes the address at which the kernel image is loaded,
629 as a security feature that deters exploit attempts relying on
630 knowledge of the location of kernel internals.
636 config ARCH_SPARSEMEM_ENABLE
638 select SPARSEMEM_VMEMMAP_ENABLE
639 select SPARSEMEM_VMEMMAP
641 config ARCH_SPARSEMEM_DEFAULT
644 config ARCH_SELECT_MEMORY_MODEL
647 config ARCH_ENABLE_MEMORY_HOTPLUG
648 def_bool y if SPARSEMEM
650 config ARCH_ENABLE_MEMORY_HOTREMOVE
653 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
656 config FORCE_MAX_ZONEORDER
660 config MAX_PHYSMEM_BITS
661 int "Maximum size of supported physical memory in bits (42-53)"
665 This option specifies the maximum supported size of physical memory
666 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
667 Increasing the number of bits also increases the kernel image size.
668 By default 46 bits (64TB) are supported.
672 prompt "Pack kernel stack"
674 This option enables the compiler option -mkernel-backchain if it
675 is available. If the option is available the compiler supports
676 the new stack layout which dramatically reduces the minimum stack
677 frame size. With an old compiler a non-leaf function needs a
678 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
679 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
680 and 24 byte on 64 bit.
682 Say Y if you are unsure.
686 depends on !VMAP_STACK
687 prompt "Detect kernel stack overflow"
689 This option enables the compiler option -mstack-guard and
690 -mstack-size if they are available. If the compiler supports them
691 it will emit additional code to each function prolog to trigger
692 an illegal operation if the kernel stack is about to overflow.
694 Say N if you are unsure.
697 int "Size of the guard area (128-1024)"
699 depends on CHECK_STACK
702 This allows you to specify the size of the guard area at the lower
703 end of the kernel stack. If the kernel stack points into the guard
704 area on function entry an illegal operation is triggered. The size
705 needs to be a power of 2. Please keep in mind that the size of an
706 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
707 The minimum size for the stack guard should be 256 for 31 bit and
710 config WARN_DYNAMIC_STACK
712 prompt "Emit compiler warnings for function with dynamic stack usage"
714 This option enables the compiler option -mwarn-dynamicstack. If the
715 compiler supports this options generates warnings for functions
716 that dynamically allocate stack space using alloca.
718 Say N if you are unsure.
726 prompt "QDIO support"
728 This driver provides the Queued Direct I/O base support for
731 To compile this driver as a module, choose M here: the
732 module will be called qdio.
738 config PCI_NR_FUNCTIONS
739 int "Maximum number of PCI functions (1-4096)"
743 This allows you to specify the maximum number of PCI functions which
744 this kernel will support.
753 prompt "Support for CHSC subchannels"
755 This driver allows usage of CHSC subchannels. A CHSC subchannel
756 is usually present on LPAR only.
757 The driver creates a device /dev/chsc, which may be used to
758 obtain I/O configuration information about the machine and
759 to issue asynchronous chsc commands (DANGEROUS).
760 You will usually only want to use this interface on a special
761 LPAR designated for system management.
763 To compile this driver as a module, choose M here: the
764 module will be called chsc_sch.
770 prompt "SCM bus driver"
772 Bus driver for Storage Class Memory.
776 prompt "Support for EADM subchannels"
779 This driver allows usage of EADM subchannels. EADM subchannels act
780 as a communication vehicle for SCM increments.
782 To compile this driver as a module, choose M here: the
783 module will be called eadm_sch.
787 prompt "Support for VFIO-CCW subchannels"
788 depends on S390_CCW_IOMMU && VFIO_MDEV
790 This driver allows usage of I/O subchannels via VFIO-CCW.
792 To compile this driver as a module, choose M here: the
793 module will be called vfio_ccw.
797 prompt "VFIO support for AP devices"
798 depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
800 This driver grants access to Adjunct Processor (AP) devices
801 via the VFIO mediated device interface.
803 To compile this driver as a module, choose M here: the module
804 will be called vfio_ap.
811 bool "kernel crash dumps"
814 Generate crash dump after being started by kexec.
815 Crash dump kernels are loaded in the main kernel with kexec-tools
816 into a specially reserved region and then later executed after
817 a crash by kdump/kexec.
818 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
819 This option also enables s390 zfcpdump.
820 See also <file:Documentation/s390/zfcpdump.rst>
826 prompt "Enable seccomp to safely compute untrusted bytecode"
829 This kernel feature is useful for number crunching applications
830 that may need to compute untrusted bytecode during their
831 execution. By using pipes or other transports made available to
832 the process as file descriptors supporting the read/write
833 syscalls, it's possible to isolate those applications in
834 their own address space using seccomp. Once seccomp is
835 enabled via /proc/<pid>/seccomp, it cannot be disabled
836 and the task is only allowed to execute a few safe syscalls
837 defined by each seccomp mode.
841 menu "Power Management"
843 config ARCH_HIBERNATION_POSSIBLE
846 source "kernel/power/Kconfig"
855 default (SMC || CCWGROUP)
857 menu "Virtualization"
859 config PROTECTED_VIRTUALIZATION_GUEST
861 prompt "Protected virtualization guest support"
863 Select this option, if you want to be able to run this
864 kernel as a protected virtualization KVM guest.
865 Protected virtualization capable machines have a mini hypervisor
866 located at machine level (an ultravisor). With help of the
867 Ultravisor, KVM will be able to run "protected" VMs, special
868 VMs whose memory and management data are unavailable to KVM.
872 prompt "Pseudo page fault support"
874 Select this option, if you want to use PFAULT pseudo page fault
875 handling under VM. If running native or in LPAR, this option
876 has no effect. If your VM does not support PFAULT, PAGEEX
877 pseudo page fault handling will be used.
878 Note that VM 4.2 supports PFAULT but has a bug in its
879 implementation that causes some problems.
880 Everybody who wants to run Linux under VM != VM4.2 should select
885 prompt "Cooperative memory management"
887 Select this option, if you want to enable the kernel interface
888 to reduce the memory size of the system. This is accomplished
889 by allocating pages of memory and put them "on hold". This only
890 makes sense for a system running under VM where the unused pages
891 will be reused by VM for other guest systems. The interface
892 allows an external monitor to balance memory of many systems.
893 Everybody who wants to run Linux under VM should select this
898 prompt "IUCV special message interface to cooperative memory management"
899 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
901 Select this option to enable the special message interface to
902 the cooperative memory management.
906 prompt "Linux - VM Monitor Stream, base infrastructure"
909 This provides a kernel interface for creating and updating z/VM APPLDATA
910 monitor records. The monitor records are updated at certain time
911 intervals, once the timer is started.
912 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
913 i.e. enables or disables monitoring on the Linux side.
914 A custom interval value (in seconds) can be written to
915 /proc/appldata/interval.
917 Defaults are 60 seconds interval and timer off.
918 The /proc entries can also be read from, showing the current settings.
922 prompt "Monitor memory management statistics"
923 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
925 This provides memory management related data to the Linux - VM Monitor
926 Stream, like paging/swapping rate, memory utilisation, etc.
927 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
928 APPLDATA monitor record, i.e. enables or disables monitoring this record
932 The /proc entry can also be read from, showing the current settings.
934 This can also be compiled as a module, which will be called
939 prompt "Monitor OS statistics"
940 depends on APPLDATA_BASE
942 This provides OS related data to the Linux - VM Monitor Stream, like
943 CPU utilisation, etc.
944 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
945 APPLDATA monitor record, i.e. enables or disables monitoring this record
949 This can also be compiled as a module, which will be called
952 config APPLDATA_NET_SUM
954 prompt "Monitor overall network statistics"
955 depends on APPLDATA_BASE && NET
957 This provides network related data to the Linux - VM Monitor Stream,
958 currently there is only a total sum of network I/O statistics, no
960 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
961 APPLDATA monitor record, i.e. enables or disables monitoring this record
965 This can also be compiled as a module, which will be called
970 prompt "s390 hypervisor file system support"
971 select SYS_HYPERVISOR
973 This is a virtual file system intended to provide accounting
974 information in an s390 hypervisor environment.
976 source "arch/s390/kvm/Kconfig"
980 prompt "s390 support for virtio devices"
982 select VIRTUALIZATION
984 select VIRTIO_CONSOLE
986 Enabling this option adds support for virtio based paravirtual device
989 Select this option if you want to run the kernel as a guest under