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_SG_CHAIN
77 select ARCH_HAS_STRICT_KERNEL_RWX
78 select ARCH_HAS_STRICT_MODULE_RWX
79 select ARCH_HAS_UBSAN_SANITIZE_ALL
80 select ARCH_HAVE_NMI_SAFE_CMPXCHG
81 select ARCH_INLINE_READ_LOCK
82 select ARCH_INLINE_READ_LOCK_BH
83 select ARCH_INLINE_READ_LOCK_IRQ
84 select ARCH_INLINE_READ_LOCK_IRQSAVE
85 select ARCH_INLINE_READ_TRYLOCK
86 select ARCH_INLINE_READ_UNLOCK
87 select ARCH_INLINE_READ_UNLOCK_BH
88 select ARCH_INLINE_READ_UNLOCK_IRQ
89 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
90 select ARCH_INLINE_SPIN_LOCK
91 select ARCH_INLINE_SPIN_LOCK_BH
92 select ARCH_INLINE_SPIN_LOCK_IRQ
93 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
94 select ARCH_INLINE_SPIN_TRYLOCK
95 select ARCH_INLINE_SPIN_TRYLOCK_BH
96 select ARCH_INLINE_SPIN_UNLOCK
97 select ARCH_INLINE_SPIN_UNLOCK_BH
98 select ARCH_INLINE_SPIN_UNLOCK_IRQ
99 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
100 select ARCH_INLINE_WRITE_LOCK
101 select ARCH_INLINE_WRITE_LOCK_BH
102 select ARCH_INLINE_WRITE_LOCK_IRQ
103 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
104 select ARCH_INLINE_WRITE_TRYLOCK
105 select ARCH_INLINE_WRITE_UNLOCK
106 select ARCH_INLINE_WRITE_UNLOCK_BH
107 select ARCH_INLINE_WRITE_UNLOCK_IRQ
108 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
109 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
110 select ARCH_SUPPORTS_ATOMIC_RMW
111 select ARCH_SUPPORTS_NUMA_BALANCING
112 select ARCH_USE_BUILTIN_BSWAP
113 select ARCH_USE_CMPXCHG_LOCKREF
114 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
115 select ARCH_WANT_IPC_PARSE_VERSION
116 select BUILDTIME_EXTABLE_SORT
117 select CLONE_BACKWARDS2
118 select DYNAMIC_FTRACE if FUNCTION_TRACER
119 select GENERIC_CLOCKEVENTS
120 select GENERIC_CPU_AUTOPROBE
121 select GENERIC_CPU_DEVICES if !SMP
122 select GENERIC_CPU_VULNERABILITIES
123 select GENERIC_FIND_FIRST_BIT
124 select GENERIC_SMP_IDLE_THREAD
125 select GENERIC_TIME_VSYSCALL
126 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
127 select HAVE_ARCH_AUDITSYSCALL
128 select HAVE_ARCH_JUMP_LABEL
129 select HAVE_ARCH_JUMP_LABEL_RELATIVE
130 select HAVE_ARCH_KASAN
131 select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
132 select HAVE_ARCH_SECCOMP_FILTER
133 select HAVE_ARCH_SOFT_DIRTY
134 select HAVE_ARCH_TRACEHOOK
135 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
136 select HAVE_ARCH_VMAP_STACK
137 select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
138 select HAVE_CMPXCHG_DOUBLE
139 select HAVE_CMPXCHG_LOCAL
140 select HAVE_COPY_THREAD_TLS
141 select HAVE_DEBUG_KMEMLEAK
142 select HAVE_DMA_CONTIGUOUS
143 select DMA_DIRECT_OPS
144 select HAVE_DYNAMIC_FTRACE
145 select HAVE_DYNAMIC_FTRACE_WITH_REGS
146 select HAVE_EFFICIENT_UNALIGNED_ACCESS
148 select HAVE_FTRACE_MCOUNT_RECORD
149 select HAVE_FUNCTION_GRAPH_TRACER
150 select HAVE_FUNCTION_TRACER
151 select HAVE_FUTEX_CMPXCHG if FUTEX
152 select HAVE_GCC_PLUGINS
153 select HAVE_KERNEL_BZIP2
154 select HAVE_KERNEL_GZIP
155 select HAVE_KERNEL_LZ4
156 select HAVE_KERNEL_LZMA
157 select HAVE_KERNEL_LZO
158 select HAVE_KERNEL_UNCOMPRESSED
159 select HAVE_KERNEL_XZ
161 select HAVE_KRETPROBES
163 select HAVE_LIVEPATCH
164 select HAVE_PERF_REGS
165 select HAVE_PERF_USER_STACK_DUMP
166 select HAVE_MEMBLOCK_NODE_MAP
167 select HAVE_MEMBLOCK_PHYS_MAP
168 select HAVE_MOD_ARCH_SPECIFIC
169 select HAVE_NOP_MCOUNT
172 select HAVE_PERF_EVENTS
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_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
195 config SCHED_OMIT_FRAME_POINTER
198 config PGTABLE_LEVELS
202 source "kernel/livepatch/Kconfig"
204 menu "Processor type and features"
206 config HAVE_MARCH_Z900_FEATURES
209 config HAVE_MARCH_Z990_FEATURES
211 select HAVE_MARCH_Z900_FEATURES
213 config HAVE_MARCH_Z9_109_FEATURES
215 select HAVE_MARCH_Z990_FEATURES
217 config HAVE_MARCH_Z10_FEATURES
219 select HAVE_MARCH_Z9_109_FEATURES
221 config HAVE_MARCH_Z196_FEATURES
223 select HAVE_MARCH_Z10_FEATURES
225 config HAVE_MARCH_ZEC12_FEATURES
227 select HAVE_MARCH_Z196_FEATURES
229 config HAVE_MARCH_Z13_FEATURES
231 select HAVE_MARCH_ZEC12_FEATURES
233 config HAVE_MARCH_Z14_FEATURES
235 select HAVE_MARCH_Z13_FEATURES
238 prompt "Processor type"
242 bool "IBM zSeries model z800 and z900"
243 select HAVE_MARCH_Z900_FEATURES
245 Select this to enable optimizations for model z800/z900 (2064 and
246 2066 series). This will enable some optimizations that are not
247 available on older ESA/390 (31 Bit) only CPUs.
250 bool "IBM zSeries model z890 and z990"
251 select HAVE_MARCH_Z990_FEATURES
253 Select this to enable optimizations for model z890/z990 (2084 and
254 2086 series). The kernel will be slightly faster but will not work
259 select HAVE_MARCH_Z9_109_FEATURES
261 Select this to enable optimizations for IBM System z9 (2094 and
262 2096 series). The kernel will be slightly faster but will not work
266 bool "IBM System z10"
267 select HAVE_MARCH_Z10_FEATURES
269 Select this to enable optimizations for IBM System z10 (2097 and
270 2098 series). The kernel will be slightly faster but will not work
274 bool "IBM zEnterprise 114 and 196"
275 select HAVE_MARCH_Z196_FEATURES
277 Select this to enable optimizations for IBM zEnterprise 114 and 196
278 (2818 and 2817 series). The kernel will be slightly faster but will
279 not work on older machines.
282 bool "IBM zBC12 and zEC12"
283 select HAVE_MARCH_ZEC12_FEATURES
285 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
286 2827 series). The kernel will be slightly faster but will not work on
290 bool "IBM z13s and z13"
291 select HAVE_MARCH_Z13_FEATURES
293 Select this to enable optimizations for IBM z13s and z13 (2965 and
294 2964 series). The kernel will be slightly faster but will not work on
298 bool "IBM z14 ZR1 and z14"
299 select HAVE_MARCH_Z14_FEATURES
301 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
302 and 3906 series). The kernel will be slightly faster but will not
303 work on older machines.
307 config MARCH_Z900_TUNE
308 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
310 config MARCH_Z990_TUNE
311 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
313 config MARCH_Z9_109_TUNE
314 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
316 config MARCH_Z10_TUNE
317 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
319 config MARCH_Z196_TUNE
320 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
322 config MARCH_ZEC12_TUNE
323 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
325 config MARCH_Z13_TUNE
326 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
328 config MARCH_Z14_TUNE
329 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
332 prompt "Tune code generation"
335 Cause the compiler to tune (-mtune) the generated code for a machine.
336 This will make the code run faster on the selected machine but
337 somewhat slower on other machines.
338 This option only changes how the compiler emits instructions, not the
339 selection of instructions itself, so the resulting kernel will run on
345 Tune the generated code for the target processor for which the kernel
349 bool "IBM zSeries model z800 and z900"
352 bool "IBM zSeries model z890 and z990"
358 bool "IBM System z10"
361 bool "IBM zEnterprise 114 and 196"
364 bool "IBM zBC12 and zEC12"
379 prompt "Kernel support for 31 bit emulation"
380 select COMPAT_BINFMT_ELF if BINFMT_ELF
381 select ARCH_WANT_OLD_COMPAT_IPC
382 select COMPAT_OLD_SIGACTION
385 Select this option if you want to enable your system kernel to
386 handle system-calls from ELF binaries for 31 bit ESA. This option
387 (and some other stuff like libraries and such) is needed for
388 executing 31 bit applications. It is safe to say "Y".
390 config SYSVIPC_COMPAT
391 def_bool y if COMPAT && SYSVIPC
395 prompt "Symmetric multi-processing support"
397 This enables support for systems with more than one CPU. If you have
398 a system with only one CPU, like most personal computers, say N. If
399 you have a system with more than one CPU, say Y.
401 If you say N here, the kernel will run on uni- and multiprocessor
402 machines, but will use only one CPU of a multiprocessor machine. If
403 you say Y here, the kernel will run on many, but not all,
404 uniprocessor machines. On a uniprocessor machine, the kernel
405 will run faster if you say N here.
407 See also the SMP-HOWTO available at
408 <http://www.tldp.org/docs.html#howto>.
410 Even if you don't know what to do here, say Y.
413 int "Maximum number of CPUs (2-512)"
418 This allows you to specify the maximum number of CPUs which this
419 kernel will support. The maximum supported value is 512 and the
420 minimum value which makes sense is 2.
422 This is purely to save memory - each supported CPU adds
423 approximately sixteen kilobytes to the kernel image.
427 prompt "Support for hot-pluggable CPUs"
430 Say Y here to be able to turn CPUs off and on. CPUs
431 can be controlled through /sys/devices/system/cpu/cpu#.
432 Say N if you want to disable CPU hotplug.
434 # Some NUMA nodes have memory ranges that span
435 # other nodes. Even though a pfn is valid and
436 # between a node's start and end pfns, it may not
437 # reside on that node. See memmap_init_zone()
438 # for details. <- They meant memory holes!
439 config NODES_SPAN_OTHER_NODES
444 depends on SMP && SCHED_TOPOLOGY
449 This option adds NUMA support to the kernel.
451 An operation mode can be selected by appending
452 numa=<method> to the kernel command line.
454 The default behaviour is identical to appending numa=plain to
455 the command line. This will create just one node with all
456 available memory and all CPUs in it.
459 int "Maximum NUMA nodes (as a power of 2)"
464 Specify the maximum number of NUMA nodes available on the target
465 system. Increases memory reserved to accommodate various tables.
467 menu "Select NUMA modes"
471 bool "NUMA emulation"
474 Numa emulation mode will split the available system memory into
475 equal chunks which then are distributed over the configured number
476 of nodes in a round-robin manner.
478 The number of fake nodes is limited by the number of available memory
479 chunks (i.e. memory size / fake size) and the number of supported
482 The CPUs are assigned to the nodes in a way that partially respects
483 the original machine topology (if supported by the machine).
484 Fair distribution of the CPUs is not guaranteed.
487 hex "NUMA emulation memory chunk size"
489 range 0x400000 0x100000000
492 Select the default size by which the memory is chopped and then
493 assigned to emulated NUMA nodes.
495 This can be overridden by specifying
499 on the kernel command line where also suffixes K, M, G, and T are
516 config SCHED_TOPOLOGY
518 prompt "Topology scheduler support"
525 Topology scheduler support improves the CPU scheduler's decision
526 making when dealing with machines that have multi-threading,
527 multiple cores or multiple books.
529 source kernel/Kconfig.hz
536 bool "kexec file based system call"
540 depends on CRYPTO_SHA256
541 depends on CRYPTO_SHA256_S390
543 Enable the kexec file based system call. In contrast to the normal
544 kexec system call this system call takes file descriptors for the
545 kernel and initramfs as arguments.
547 config ARCH_HAS_KEXEC_PURGATORY
549 depends on KEXEC_FILE
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"
615 config ARCH_SPARSEMEM_ENABLE
617 select SPARSEMEM_VMEMMAP_ENABLE
618 select SPARSEMEM_VMEMMAP
620 config ARCH_SPARSEMEM_DEFAULT
623 config ARCH_SELECT_MEMORY_MODEL
626 config ARCH_ENABLE_MEMORY_HOTPLUG
627 def_bool y if SPARSEMEM
629 config ARCH_ENABLE_MEMORY_HOTREMOVE
632 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
635 config FORCE_MAX_ZONEORDER
639 config MAX_PHYSMEM_BITS
640 int "Maximum size of supported physical memory in bits (42-53)"
644 This option specifies the maximum supported size of physical memory
645 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
646 Increasing the number of bits also increases the kernel image size.
647 By default 46 bits (64TB) are supported.
651 prompt "Pack kernel stack"
653 This option enables the compiler option -mkernel-backchain if it
654 is available. If the option is available the compiler supports
655 the new stack layout which dramatically reduces the minimum stack
656 frame size. With an old compiler a non-leaf function needs a
657 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
658 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
659 and 24 byte on 64 bit.
661 Say Y if you are unsure.
665 depends on !VMAP_STACK
666 prompt "Detect kernel stack overflow"
668 This option enables the compiler option -mstack-guard and
669 -mstack-size if they are available. If the compiler supports them
670 it will emit additional code to each function prolog to trigger
671 an illegal operation if the kernel stack is about to overflow.
673 Say N if you are unsure.
676 int "Size of the guard area (128-1024)"
678 depends on CHECK_STACK
681 This allows you to specify the size of the guard area at the lower
682 end of the kernel stack. If the kernel stack points into the guard
683 area on function entry an illegal operation is triggered. The size
684 needs to be a power of 2. Please keep in mind that the size of an
685 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
686 The minimum size for the stack guard should be 256 for 31 bit and
689 config WARN_DYNAMIC_STACK
691 prompt "Emit compiler warnings for function with dynamic stack usage"
693 This option enables the compiler option -mwarn-dynamicstack. If the
694 compiler supports this options generates warnings for functions
695 that dynamically allocate stack space using alloca.
697 Say N if you are unsure.
705 prompt "QDIO support"
707 This driver provides the Queued Direct I/O base support for
710 To compile this driver as a module, choose M here: the
711 module will be called qdio.
717 config PCI_NR_FUNCTIONS
718 int "Maximum number of PCI functions (1-4096)"
722 This allows you to specify the maximum number of PCI functions which
723 this kernel will support.
735 prompt "Support for CHSC subchannels"
737 This driver allows usage of CHSC subchannels. A CHSC subchannel
738 is usually present on LPAR only.
739 The driver creates a device /dev/chsc, which may be used to
740 obtain I/O configuration information about the machine and
741 to issue asynchronous chsc commands (DANGEROUS).
742 You will usually only want to use this interface on a special
743 LPAR designated for system management.
745 To compile this driver as a module, choose M here: the
746 module will be called chsc_sch.
752 prompt "SCM bus driver"
754 Bus driver for Storage Class Memory.
758 prompt "Support for EADM subchannels"
761 This driver allows usage of EADM subchannels. EADM subchannels act
762 as a communication vehicle for SCM increments.
764 To compile this driver as a module, choose M here: the
765 module will be called eadm_sch.
769 prompt "Support for VFIO-CCW subchannels"
770 depends on S390_CCW_IOMMU && VFIO_MDEV
772 This driver allows usage of I/O subchannels via VFIO-CCW.
774 To compile this driver as a module, choose M here: the
775 module will be called vfio_ccw.
779 prompt "VFIO support for AP devices"
780 depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
782 This driver grants access to Adjunct Processor (AP) devices
783 via the VFIO mediated device interface.
785 To compile this driver as a module, choose M here: the module
786 will be called vfio_ap.
793 bool "kernel crash dumps"
797 Generate crash dump after being started by kexec.
798 Crash dump kernels are loaded in the main kernel with kexec-tools
799 into a specially reserved region and then later executed after
800 a crash by kdump/kexec.
801 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
802 This option also enables s390 zfcpdump.
803 See also <file:Documentation/s390/zfcpdump.txt>
809 prompt "Enable seccomp to safely compute untrusted bytecode"
812 This kernel feature is useful for number crunching applications
813 that may need to compute untrusted bytecode during their
814 execution. By using pipes or other transports made available to
815 the process as file descriptors supporting the read/write
816 syscalls, it's possible to isolate those applications in
817 their own address space using seccomp. Once seccomp is
818 enabled via /proc/<pid>/seccomp, it cannot be disabled
819 and the task is only allowed to execute a few safe syscalls
820 defined by each seccomp mode.
824 menu "Power Management"
826 config ARCH_HIBERNATION_POSSIBLE
829 source "kernel/power/Kconfig"
841 default (SMC || CCWGROUP)
843 menu "Virtualization"
847 prompt "Pseudo page fault support"
849 Select this option, if you want to use PFAULT pseudo page fault
850 handling under VM. If running native or in LPAR, this option
851 has no effect. If your VM does not support PFAULT, PAGEEX
852 pseudo page fault handling will be used.
853 Note that VM 4.2 supports PFAULT but has a bug in its
854 implementation that causes some problems.
855 Everybody who wants to run Linux under VM != VM4.2 should select
860 prompt "Cooperative memory management"
862 Select this option, if you want to enable the kernel interface
863 to reduce the memory size of the system. This is accomplished
864 by allocating pages of memory and put them "on hold". This only
865 makes sense for a system running under VM where the unused pages
866 will be reused by VM for other guest systems. The interface
867 allows an external monitor to balance memory of many systems.
868 Everybody who wants to run Linux under VM should select this
873 prompt "IUCV special message interface to cooperative memory management"
874 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
876 Select this option to enable the special message interface to
877 the cooperative memory management.
881 prompt "Linux - VM Monitor Stream, base infrastructure"
884 This provides a kernel interface for creating and updating z/VM APPLDATA
885 monitor records. The monitor records are updated at certain time
886 intervals, once the timer is started.
887 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
888 i.e. enables or disables monitoring on the Linux side.
889 A custom interval value (in seconds) can be written to
890 /proc/appldata/interval.
892 Defaults are 60 seconds interval and timer off.
893 The /proc entries can also be read from, showing the current settings.
897 prompt "Monitor memory management statistics"
898 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
900 This provides memory management related data to the Linux - VM Monitor
901 Stream, like paging/swapping rate, memory utilisation, etc.
902 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
903 APPLDATA monitor record, i.e. enables or disables monitoring this record
907 The /proc entry can also be read from, showing the current settings.
909 This can also be compiled as a module, which will be called
914 prompt "Monitor OS statistics"
915 depends on APPLDATA_BASE
917 This provides OS related data to the Linux - VM Monitor Stream, like
918 CPU utilisation, etc.
919 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
920 APPLDATA monitor record, i.e. enables or disables monitoring this record
924 This can also be compiled as a module, which will be called
927 config APPLDATA_NET_SUM
929 prompt "Monitor overall network statistics"
930 depends on APPLDATA_BASE && NET
932 This provides network related data to the Linux - VM Monitor Stream,
933 currently there is only a total sum of network I/O statistics, no
935 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
936 APPLDATA monitor record, i.e. enables or disables monitoring this record
940 This can also be compiled as a module, which will be called
945 prompt "s390 hypervisor file system support"
946 select SYS_HYPERVISOR
948 This is a virtual file system intended to provide accounting
949 information in an s390 hypervisor environment.
951 source "arch/s390/kvm/Kconfig"
955 prompt "s390 support for virtio devices"
957 select VIRTUALIZATION
959 select VIRTIO_CONSOLE
961 Enabling this option adds support for virtio based paravirtual device
964 Select this option if you want to run the kernel as a guest under