1 # SPDX-License-Identifier: GPL-2.0
11 config LOCKDEP_SUPPORT
14 config STACKTRACE_SUPPORT
17 config RWSEM_GENERIC_SPINLOCK
20 config RWSEM_XCHGADD_ALGORITHM
23 config ARCH_HAS_ILOG2_U32
26 config ARCH_HAS_ILOG2_U64
29 config GENERIC_HWEIGHT
35 config GENERIC_BUG_RELATIVE_POINTERS
38 config GENERIC_LOCKBREAK
39 def_bool y if SMP && PREEMPT
44 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
56 config ARCH_SUPPORTS_UPROBES
59 config KASAN_SHADOW_OFFSET
62 default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING
67 select ARCH_BINFMT_ELF_STATE
68 select ARCH_HAS_DEVMEM_IS_ALLOWED
69 select ARCH_HAS_ELF_RANDOMIZE
70 select ARCH_HAS_FORTIFY_SOURCE
71 select ARCH_HAS_GCOV_PROFILE_ALL
72 select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
74 select ARCH_HAS_PTE_SPECIAL
75 select ARCH_HAS_SET_MEMORY
76 select ARCH_HAS_STRICT_KERNEL_RWX
77 select ARCH_HAS_STRICT_MODULE_RWX
78 select ARCH_HAS_UBSAN_SANITIZE_ALL
79 select ARCH_HAVE_NMI_SAFE_CMPXCHG
80 select ARCH_INLINE_READ_LOCK
81 select ARCH_INLINE_READ_LOCK_BH
82 select ARCH_INLINE_READ_LOCK_IRQ
83 select ARCH_INLINE_READ_LOCK_IRQSAVE
84 select ARCH_INLINE_READ_TRYLOCK
85 select ARCH_INLINE_READ_UNLOCK
86 select ARCH_INLINE_READ_UNLOCK_BH
87 select ARCH_INLINE_READ_UNLOCK_IRQ
88 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
89 select ARCH_INLINE_SPIN_LOCK
90 select ARCH_INLINE_SPIN_LOCK_BH
91 select ARCH_INLINE_SPIN_LOCK_IRQ
92 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
93 select ARCH_INLINE_SPIN_TRYLOCK
94 select ARCH_INLINE_SPIN_TRYLOCK_BH
95 select ARCH_INLINE_SPIN_UNLOCK
96 select ARCH_INLINE_SPIN_UNLOCK_BH
97 select ARCH_INLINE_SPIN_UNLOCK_IRQ
98 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
99 select ARCH_INLINE_WRITE_LOCK
100 select ARCH_INLINE_WRITE_LOCK_BH
101 select ARCH_INLINE_WRITE_LOCK_IRQ
102 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
103 select ARCH_INLINE_WRITE_TRYLOCK
104 select ARCH_INLINE_WRITE_UNLOCK
105 select ARCH_INLINE_WRITE_UNLOCK_BH
106 select ARCH_INLINE_WRITE_UNLOCK_IRQ
107 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
108 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
109 select ARCH_SUPPORTS_ATOMIC_RMW
110 select ARCH_SUPPORTS_NUMA_BALANCING
111 select ARCH_USE_BUILTIN_BSWAP
112 select ARCH_USE_CMPXCHG_LOCKREF
113 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
114 select ARCH_WANT_IPC_PARSE_VERSION
115 select BUILDTIME_EXTABLE_SORT
116 select CLONE_BACKWARDS2
117 select DYNAMIC_FTRACE if FUNCTION_TRACER
118 select GENERIC_CLOCKEVENTS
119 select GENERIC_CPU_AUTOPROBE
120 select GENERIC_CPU_DEVICES if !SMP
121 select GENERIC_CPU_VULNERABILITIES
122 select GENERIC_FIND_FIRST_BIT
123 select GENERIC_SMP_IDLE_THREAD
124 select GENERIC_TIME_VSYSCALL
125 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
126 select HAVE_ARCH_AUDITSYSCALL
127 select HAVE_ARCH_JUMP_LABEL
128 select HAVE_ARCH_JUMP_LABEL_RELATIVE
129 select HAVE_ARCH_KASAN
130 select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
131 select HAVE_ARCH_SECCOMP_FILTER
132 select HAVE_ARCH_SOFT_DIRTY
133 select HAVE_ARCH_TRACEHOOK
134 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
135 select HAVE_ARCH_VMAP_STACK
136 select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
137 select HAVE_CMPXCHG_DOUBLE
138 select HAVE_CMPXCHG_LOCAL
139 select HAVE_COPY_THREAD_TLS
140 select HAVE_DEBUG_KMEMLEAK
141 select HAVE_DMA_CONTIGUOUS
142 select HAVE_DYNAMIC_FTRACE
143 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_MOD_ARCH_SPECIFIC
167 select HAVE_NOP_MCOUNT
170 select HAVE_PERF_EVENTS
171 select HAVE_REGS_AND_STACK_ACCESS_API
173 select HAVE_SYSCALL_TRACEPOINTS
174 select HAVE_VIRT_CPU_ACCOUNTING
175 select IOMMU_HELPER if PCI
176 select IOMMU_SUPPORT if PCI
177 select MODULES_USE_ELF_RELA
178 select NEED_DMA_MAP_STATE if PCI
179 select NEED_SG_DMA_LENGTH if PCI
181 select OLD_SIGSUSPEND3
182 select PCI_DOMAINS if PCI
183 select PCI_MSI if PCI
185 select SYSCTL_EXCEPTION_TRACE
186 select THREAD_INFO_IN_TASK
188 select VIRT_CPU_ACCOUNTING
189 select ARCH_HAS_SCALED_CPUTIME
194 config SCHED_OMIT_FRAME_POINTER
197 config PGTABLE_LEVELS
201 source "kernel/livepatch/Kconfig"
203 menu "Processor type and features"
205 config HAVE_MARCH_Z900_FEATURES
208 config HAVE_MARCH_Z990_FEATURES
210 select HAVE_MARCH_Z900_FEATURES
212 config HAVE_MARCH_Z9_109_FEATURES
214 select HAVE_MARCH_Z990_FEATURES
216 config HAVE_MARCH_Z10_FEATURES
218 select HAVE_MARCH_Z9_109_FEATURES
220 config HAVE_MARCH_Z196_FEATURES
222 select HAVE_MARCH_Z10_FEATURES
224 config HAVE_MARCH_ZEC12_FEATURES
226 select HAVE_MARCH_Z196_FEATURES
228 config HAVE_MARCH_Z13_FEATURES
230 select HAVE_MARCH_ZEC12_FEATURES
232 config HAVE_MARCH_Z14_FEATURES
234 select HAVE_MARCH_Z13_FEATURES
237 prompt "Processor type"
241 bool "IBM zSeries model z800 and z900"
242 select HAVE_MARCH_Z900_FEATURES
244 Select this to enable optimizations for model z800/z900 (2064 and
245 2066 series). This will enable some optimizations that are not
246 available on older ESA/390 (31 Bit) only CPUs.
249 bool "IBM zSeries model z890 and z990"
250 select HAVE_MARCH_Z990_FEATURES
252 Select this to enable optimizations for model z890/z990 (2084 and
253 2086 series). The kernel will be slightly faster but will not work
258 select HAVE_MARCH_Z9_109_FEATURES
260 Select this to enable optimizations for IBM System z9 (2094 and
261 2096 series). The kernel will be slightly faster but will not work
265 bool "IBM System z10"
266 select HAVE_MARCH_Z10_FEATURES
268 Select this to enable optimizations for IBM System z10 (2097 and
269 2098 series). The kernel will be slightly faster but will not work
273 bool "IBM zEnterprise 114 and 196"
274 select HAVE_MARCH_Z196_FEATURES
276 Select this to enable optimizations for IBM zEnterprise 114 and 196
277 (2818 and 2817 series). The kernel will be slightly faster but will
278 not work on older machines.
281 bool "IBM zBC12 and zEC12"
282 select HAVE_MARCH_ZEC12_FEATURES
284 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
285 2827 series). The kernel will be slightly faster but will not work on
289 bool "IBM z13s and z13"
290 select HAVE_MARCH_Z13_FEATURES
292 Select this to enable optimizations for IBM z13s and z13 (2965 and
293 2964 series). The kernel will be slightly faster but will not work on
297 bool "IBM z14 ZR1 and z14"
298 select HAVE_MARCH_Z14_FEATURES
300 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
301 and 3906 series). The kernel will be slightly faster but will not
302 work on older machines.
306 config MARCH_Z900_TUNE
307 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
309 config MARCH_Z990_TUNE
310 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
312 config MARCH_Z9_109_TUNE
313 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
315 config MARCH_Z10_TUNE
316 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
318 config MARCH_Z196_TUNE
319 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
321 config MARCH_ZEC12_TUNE
322 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
324 config MARCH_Z13_TUNE
325 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
327 config MARCH_Z14_TUNE
328 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
331 prompt "Tune code generation"
334 Cause the compiler to tune (-mtune) the generated code for a machine.
335 This will make the code run faster on the selected machine but
336 somewhat slower on other machines.
337 This option only changes how the compiler emits instructions, not the
338 selection of instructions itself, so the resulting kernel will run on
344 Tune the generated code for the target processor for which the kernel
348 bool "IBM zSeries model z800 and z900"
351 bool "IBM zSeries model z890 and z990"
357 bool "IBM System z10"
360 bool "IBM zEnterprise 114 and 196"
363 bool "IBM zBC12 and zEC12"
378 prompt "Kernel support for 31 bit emulation"
379 select COMPAT_BINFMT_ELF if BINFMT_ELF
380 select ARCH_WANT_OLD_COMPAT_IPC
381 select COMPAT_OLD_SIGACTION
384 Select this option if you want to enable your system kernel to
385 handle system-calls from ELF binaries for 31 bit ESA. This option
386 (and some other stuff like libraries and such) is needed for
387 executing 31 bit applications. It is safe to say "Y".
389 config SYSVIPC_COMPAT
390 def_bool y if COMPAT && SYSVIPC
394 prompt "Symmetric multi-processing support"
396 This enables support for systems with more than one CPU. If you have
397 a system with only one CPU, like most personal computers, say N. If
398 you have a system with more than one CPU, say Y.
400 If you say N here, the kernel will run on uni- and multiprocessor
401 machines, but will use only one CPU of a multiprocessor machine. If
402 you say Y here, the kernel will run on many, but not all,
403 uniprocessor machines. On a uniprocessor machine, the kernel
404 will run faster if you say N here.
406 See also the SMP-HOWTO available at
407 <http://www.tldp.org/docs.html#howto>.
409 Even if you don't know what to do here, say Y.
412 int "Maximum number of CPUs (2-512)"
417 This allows you to specify the maximum number of CPUs which this
418 kernel will support. The maximum supported value is 512 and the
419 minimum value which makes sense is 2.
421 This is purely to save memory - each supported CPU adds
422 approximately sixteen kilobytes to the kernel image.
426 prompt "Support for hot-pluggable CPUs"
429 Say Y here to be able to turn CPUs off and on. CPUs
430 can be controlled through /sys/devices/system/cpu/cpu#.
431 Say N if you want to disable CPU hotplug.
433 # Some NUMA nodes have memory ranges that span
434 # other nodes. Even though a pfn is valid and
435 # between a node's start and end pfns, it may not
436 # reside on that node. See memmap_init_zone()
437 # for details. <- They meant memory holes!
438 config NODES_SPAN_OTHER_NODES
443 depends on SMP && SCHED_TOPOLOGY
448 This option adds NUMA support to the kernel.
450 An operation mode can be selected by appending
451 numa=<method> to the kernel command line.
453 The default behaviour is identical to appending numa=plain to
454 the command line. This will create just one node with all
455 available memory and all CPUs in it.
458 int "Maximum NUMA nodes (as a power of 2)"
463 Specify the maximum number of NUMA nodes available on the target
464 system. Increases memory reserved to accommodate various tables.
466 menu "Select NUMA modes"
470 bool "NUMA emulation"
473 Numa emulation mode will split the available system memory into
474 equal chunks which then are distributed over the configured number
475 of nodes in a round-robin manner.
477 The number of fake nodes is limited by the number of available memory
478 chunks (i.e. memory size / fake size) and the number of supported
481 The CPUs are assigned to the nodes in a way that partially respects
482 the original machine topology (if supported by the machine).
483 Fair distribution of the CPUs is not guaranteed.
486 hex "NUMA emulation memory chunk size"
488 range 0x400000 0x100000000
491 Select the default size by which the memory is chopped and then
492 assigned to emulated NUMA nodes.
494 This can be overridden by specifying
498 on the kernel command line where also suffixes K, M, G, and T are
515 config SCHED_TOPOLOGY
517 prompt "Topology scheduler support"
524 Topology scheduler support improves the CPU scheduler's decision
525 making when dealing with machines that have multi-threading,
526 multiple cores or multiple books.
528 source "kernel/Kconfig.hz"
535 bool "kexec file based system call"
539 depends on CRYPTO_SHA256
540 depends on CRYPTO_SHA256_S390
542 Enable the kexec file based system call. In contrast to the normal
543 kexec system call this system call takes file descriptors for the
544 kernel and initramfs as arguments.
546 config ARCH_HAS_KEXEC_PURGATORY
548 depends on KEXEC_FILE
552 prompt "s390 architectural random number generation API"
554 Enable the s390 architectural random number generation API
555 to provide random data for all consumers within the Linux
558 When enabled the arch_random_* functions declared in linux/random.h
559 are implemented. The implementation is based on the s390 CPACF
560 instruction subfunction TRNG which provides a real true random
567 prompt "Enable modified branch prediction for the kernel by default"
569 If this option is selected the kernel will switch to a modified
570 branch prediction mode if the firmware interface is available.
571 The modified branch prediction mode improves the behaviour in
572 regard to speculative execution.
574 With the option enabled the kernel parameter "nobp=0" or "nospec"
575 can be used to run the kernel in the normal branch prediction mode.
577 With the option disabled the modified branch prediction mode is
578 enabled with the "nobp=1" kernel parameter.
584 prompt "Avoid speculative indirect branches in the kernel"
586 Compile the kernel with the expoline compiler options to guard
587 against kernel-to-user data leaks by avoiding speculative indirect
589 Requires a compiler with -mindirect-branch=thunk support for full
590 protection. The kernel may run slower.
595 prompt "Expoline default"
597 default EXPOLINE_FULL
600 bool "spectre_v2=off"
603 bool "spectre_v2=auto"
614 config ARCH_SPARSEMEM_ENABLE
616 select SPARSEMEM_VMEMMAP_ENABLE
617 select SPARSEMEM_VMEMMAP
619 config ARCH_SPARSEMEM_DEFAULT
622 config ARCH_SELECT_MEMORY_MODEL
625 config ARCH_ENABLE_MEMORY_HOTPLUG
626 def_bool y if SPARSEMEM
628 config ARCH_ENABLE_MEMORY_HOTREMOVE
631 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
634 config FORCE_MAX_ZONEORDER
638 config MAX_PHYSMEM_BITS
639 int "Maximum size of supported physical memory in bits (42-53)"
643 This option specifies the maximum supported size of physical memory
644 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
645 Increasing the number of bits also increases the kernel image size.
646 By default 46 bits (64TB) are supported.
650 prompt "Pack kernel stack"
652 This option enables the compiler option -mkernel-backchain if it
653 is available. If the option is available the compiler supports
654 the new stack layout which dramatically reduces the minimum stack
655 frame size. With an old compiler a non-leaf function needs a
656 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
657 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
658 and 24 byte on 64 bit.
660 Say Y if you are unsure.
664 depends on !VMAP_STACK
665 prompt "Detect kernel stack overflow"
667 This option enables the compiler option -mstack-guard and
668 -mstack-size if they are available. If the compiler supports them
669 it will emit additional code to each function prolog to trigger
670 an illegal operation if the kernel stack is about to overflow.
672 Say N if you are unsure.
675 int "Size of the guard area (128-1024)"
677 depends on CHECK_STACK
680 This allows you to specify the size of the guard area at the lower
681 end of the kernel stack. If the kernel stack points into the guard
682 area on function entry an illegal operation is triggered. The size
683 needs to be a power of 2. Please keep in mind that the size of an
684 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
685 The minimum size for the stack guard should be 256 for 31 bit and
688 config WARN_DYNAMIC_STACK
690 prompt "Emit compiler warnings for function with dynamic stack usage"
692 This option enables the compiler option -mwarn-dynamicstack. If the
693 compiler supports this options generates warnings for functions
694 that dynamically allocate stack space using alloca.
696 Say N if you are unsure.
704 prompt "QDIO support"
706 This driver provides the Queued Direct I/O base support for
709 To compile this driver as a module, choose M here: the
710 module will be called qdio.
716 config PCI_NR_FUNCTIONS
717 int "Maximum number of PCI functions (1-4096)"
721 This allows you to specify the maximum number of PCI functions which
722 this kernel will support.
731 prompt "Support for CHSC subchannels"
733 This driver allows usage of CHSC subchannels. A CHSC subchannel
734 is usually present on LPAR only.
735 The driver creates a device /dev/chsc, which may be used to
736 obtain I/O configuration information about the machine and
737 to issue asynchronous chsc commands (DANGEROUS).
738 You will usually only want to use this interface on a special
739 LPAR designated for system management.
741 To compile this driver as a module, choose M here: the
742 module will be called chsc_sch.
748 prompt "SCM bus driver"
750 Bus driver for Storage Class Memory.
754 prompt "Support for EADM subchannels"
757 This driver allows usage of EADM subchannels. EADM subchannels act
758 as a communication vehicle for SCM increments.
760 To compile this driver as a module, choose M here: the
761 module will be called eadm_sch.
765 prompt "Support for VFIO-CCW subchannels"
766 depends on S390_CCW_IOMMU && VFIO_MDEV
768 This driver allows usage of I/O subchannels via VFIO-CCW.
770 To compile this driver as a module, choose M here: the
771 module will be called vfio_ccw.
775 prompt "VFIO support for AP devices"
776 depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
778 This driver grants access to Adjunct Processor (AP) devices
779 via the VFIO mediated device interface.
781 To compile this driver as a module, choose M here: the module
782 will be called vfio_ap.
789 bool "kernel crash dumps"
793 Generate crash dump after being started by kexec.
794 Crash dump kernels are loaded in the main kernel with kexec-tools
795 into a specially reserved region and then later executed after
796 a crash by kdump/kexec.
797 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
798 This option also enables s390 zfcpdump.
799 See also <file:Documentation/s390/zfcpdump.txt>
805 prompt "Enable seccomp to safely compute untrusted bytecode"
808 This kernel feature is useful for number crunching applications
809 that may need to compute untrusted bytecode during their
810 execution. By using pipes or other transports made available to
811 the process as file descriptors supporting the read/write
812 syscalls, it's possible to isolate those applications in
813 their own address space using seccomp. Once seccomp is
814 enabled via /proc/<pid>/seccomp, it cannot be disabled
815 and the task is only allowed to execute a few safe syscalls
816 defined by each seccomp mode.
820 menu "Power Management"
822 config ARCH_HIBERNATION_POSSIBLE
825 source "kernel/power/Kconfig"
834 default (SMC || CCWGROUP)
836 menu "Virtualization"
840 prompt "Pseudo page fault support"
842 Select this option, if you want to use PFAULT pseudo page fault
843 handling under VM. If running native or in LPAR, this option
844 has no effect. If your VM does not support PFAULT, PAGEEX
845 pseudo page fault handling will be used.
846 Note that VM 4.2 supports PFAULT but has a bug in its
847 implementation that causes some problems.
848 Everybody who wants to run Linux under VM != VM4.2 should select
853 prompt "Cooperative memory management"
855 Select this option, if you want to enable the kernel interface
856 to reduce the memory size of the system. This is accomplished
857 by allocating pages of memory and put them "on hold". This only
858 makes sense for a system running under VM where the unused pages
859 will be reused by VM for other guest systems. The interface
860 allows an external monitor to balance memory of many systems.
861 Everybody who wants to run Linux under VM should select this
866 prompt "IUCV special message interface to cooperative memory management"
867 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
869 Select this option to enable the special message interface to
870 the cooperative memory management.
874 prompt "Linux - VM Monitor Stream, base infrastructure"
877 This provides a kernel interface for creating and updating z/VM APPLDATA
878 monitor records. The monitor records are updated at certain time
879 intervals, once the timer is started.
880 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
881 i.e. enables or disables monitoring on the Linux side.
882 A custom interval value (in seconds) can be written to
883 /proc/appldata/interval.
885 Defaults are 60 seconds interval and timer off.
886 The /proc entries can also be read from, showing the current settings.
890 prompt "Monitor memory management statistics"
891 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
893 This provides memory management related data to the Linux - VM Monitor
894 Stream, like paging/swapping rate, memory utilisation, etc.
895 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
896 APPLDATA monitor record, i.e. enables or disables monitoring this record
900 The /proc entry can also be read from, showing the current settings.
902 This can also be compiled as a module, which will be called
907 prompt "Monitor OS statistics"
908 depends on APPLDATA_BASE
910 This provides OS related data to the Linux - VM Monitor Stream, like
911 CPU utilisation, etc.
912 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
913 APPLDATA monitor record, i.e. enables or disables monitoring this record
917 This can also be compiled as a module, which will be called
920 config APPLDATA_NET_SUM
922 prompt "Monitor overall network statistics"
923 depends on APPLDATA_BASE && NET
925 This provides network related data to the Linux - VM Monitor Stream,
926 currently there is only a total sum of network I/O statistics, no
928 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
929 APPLDATA monitor record, i.e. enables or disables monitoring this record
933 This can also be compiled as a module, which will be called
938 prompt "s390 hypervisor file system support"
939 select SYS_HYPERVISOR
941 This is a virtual file system intended to provide accounting
942 information in an s390 hypervisor environment.
944 source "arch/s390/kvm/Kconfig"
948 prompt "s390 support for virtio devices"
950 select VIRTUALIZATION
952 select VIRTIO_CONSOLE
954 Enabling this option adds support for virtio based paravirtual device
957 Select this option if you want to run the kernel as a guest under