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
171 select HAVE_PERF_EVENTS
172 select HAVE_REGS_AND_STACK_ACCESS_API
174 select HAVE_SYSCALL_TRACEPOINTS
175 select HAVE_VIRT_CPU_ACCOUNTING
176 select MODULES_USE_ELF_RELA
178 select OLD_SIGSUSPEND3
180 select SYSCTL_EXCEPTION_TRACE
181 select THREAD_INFO_IN_TASK
183 select VIRT_CPU_ACCOUNTING
184 select ARCH_HAS_SCALED_CPUTIME
189 config SCHED_OMIT_FRAME_POINTER
192 config PGTABLE_LEVELS
196 source "kernel/livepatch/Kconfig"
198 menu "Processor type and features"
200 config HAVE_MARCH_Z900_FEATURES
203 config HAVE_MARCH_Z990_FEATURES
205 select HAVE_MARCH_Z900_FEATURES
207 config HAVE_MARCH_Z9_109_FEATURES
209 select HAVE_MARCH_Z990_FEATURES
211 config HAVE_MARCH_Z10_FEATURES
213 select HAVE_MARCH_Z9_109_FEATURES
215 config HAVE_MARCH_Z196_FEATURES
217 select HAVE_MARCH_Z10_FEATURES
219 config HAVE_MARCH_ZEC12_FEATURES
221 select HAVE_MARCH_Z196_FEATURES
223 config HAVE_MARCH_Z13_FEATURES
225 select HAVE_MARCH_ZEC12_FEATURES
227 config HAVE_MARCH_Z14_FEATURES
229 select HAVE_MARCH_Z13_FEATURES
232 prompt "Processor type"
236 bool "IBM zSeries model z800 and z900"
237 select HAVE_MARCH_Z900_FEATURES
239 Select this to enable optimizations for model z800/z900 (2064 and
240 2066 series). This will enable some optimizations that are not
241 available on older ESA/390 (31 Bit) only CPUs.
244 bool "IBM zSeries model z890 and z990"
245 select HAVE_MARCH_Z990_FEATURES
247 Select this to enable optimizations for model z890/z990 (2084 and
248 2086 series). The kernel will be slightly faster but will not work
253 select HAVE_MARCH_Z9_109_FEATURES
255 Select this to enable optimizations for IBM System z9 (2094 and
256 2096 series). The kernel will be slightly faster but will not work
260 bool "IBM System z10"
261 select HAVE_MARCH_Z10_FEATURES
263 Select this to enable optimizations for IBM System z10 (2097 and
264 2098 series). The kernel will be slightly faster but will not work
268 bool "IBM zEnterprise 114 and 196"
269 select HAVE_MARCH_Z196_FEATURES
271 Select this to enable optimizations for IBM zEnterprise 114 and 196
272 (2818 and 2817 series). The kernel will be slightly faster but will
273 not work on older machines.
276 bool "IBM zBC12 and zEC12"
277 select HAVE_MARCH_ZEC12_FEATURES
279 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
280 2827 series). The kernel will be slightly faster but will not work on
284 bool "IBM z13s and z13"
285 select HAVE_MARCH_Z13_FEATURES
287 Select this to enable optimizations for IBM z13s and z13 (2965 and
288 2964 series). The kernel will be slightly faster but will not work on
292 bool "IBM z14 ZR1 and z14"
293 select HAVE_MARCH_Z14_FEATURES
295 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
296 and 3906 series). The kernel will be slightly faster but will not
297 work on older machines.
301 config MARCH_Z900_TUNE
302 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
304 config MARCH_Z990_TUNE
305 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
307 config MARCH_Z9_109_TUNE
308 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
310 config MARCH_Z10_TUNE
311 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
313 config MARCH_Z196_TUNE
314 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
316 config MARCH_ZEC12_TUNE
317 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
319 config MARCH_Z13_TUNE
320 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
322 config MARCH_Z14_TUNE
323 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
326 prompt "Tune code generation"
329 Cause the compiler to tune (-mtune) the generated code for a machine.
330 This will make the code run faster on the selected machine but
331 somewhat slower on other machines.
332 This option only changes how the compiler emits instructions, not the
333 selection of instructions itself, so the resulting kernel will run on
339 Tune the generated code for the target processor for which the kernel
343 bool "IBM zSeries model z800 and z900"
346 bool "IBM zSeries model z890 and z990"
352 bool "IBM System z10"
355 bool "IBM zEnterprise 114 and 196"
358 bool "IBM zBC12 and zEC12"
373 prompt "Kernel support for 31 bit emulation"
374 select COMPAT_BINFMT_ELF if BINFMT_ELF
375 select ARCH_WANT_OLD_COMPAT_IPC
376 select COMPAT_OLD_SIGACTION
379 Select this option if you want to enable your system kernel to
380 handle system-calls from ELF binaries for 31 bit ESA. This option
381 (and some other stuff like libraries and such) is needed for
382 executing 31 bit applications. It is safe to say "Y".
384 config SYSVIPC_COMPAT
385 def_bool y if COMPAT && SYSVIPC
389 prompt "Symmetric multi-processing support"
391 This enables support for systems with more than one CPU. If you have
392 a system with only one CPU, like most personal computers, say N. If
393 you have a system with more than one CPU, say Y.
395 If you say N here, the kernel will run on uni- and multiprocessor
396 machines, but will use only one CPU of a multiprocessor machine. If
397 you say Y here, the kernel will run on many, but not all,
398 uniprocessor machines. On a uniprocessor machine, the kernel
399 will run faster if you say N here.
401 See also the SMP-HOWTO available at
402 <http://www.tldp.org/docs.html#howto>.
404 Even if you don't know what to do here, say Y.
407 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.
421 prompt "Support for hot-pluggable CPUs"
424 Say Y here to be able to turn CPUs off and on. CPUs
425 can be controlled through /sys/devices/system/cpu/cpu#.
426 Say N if you want to disable CPU hotplug.
428 # Some NUMA nodes have memory ranges that span
429 # other nodes. Even though a pfn is valid and
430 # between a node's start and end pfns, it may not
431 # reside on that node. See memmap_init_zone()
432 # for details. <- They meant memory holes!
433 config NODES_SPAN_OTHER_NODES
438 depends on SMP && SCHED_TOPOLOGY
443 This option adds NUMA support to the kernel.
445 An operation mode can be selected by appending
446 numa=<method> to the kernel command line.
448 The default behaviour is identical to appending numa=plain to
449 the command line. This will create just one node with all
450 available memory and all CPUs in it.
453 int "Maximum NUMA nodes (as a power of 2)"
458 Specify the maximum number of NUMA nodes available on the target
459 system. Increases memory reserved to accommodate various tables.
461 menu "Select NUMA modes"
465 bool "NUMA emulation"
468 Numa emulation mode will split the available system memory into
469 equal chunks which then are distributed over the configured number
470 of nodes in a round-robin manner.
472 The number of fake nodes is limited by the number of available memory
473 chunks (i.e. memory size / fake size) and the number of supported
476 The CPUs are assigned to the nodes in a way that partially respects
477 the original machine topology (if supported by the machine).
478 Fair distribution of the CPUs is not guaranteed.
481 hex "NUMA emulation memory chunk size"
483 range 0x400000 0x100000000
486 Select the default size by which the memory is chopped and then
487 assigned to emulated NUMA nodes.
489 This can be overridden by specifying
493 on the kernel command line where also suffixes K, M, G, and T are
510 config SCHED_TOPOLOGY
512 prompt "Topology scheduler support"
519 Topology scheduler support improves the CPU scheduler's decision
520 making when dealing with machines that have multi-threading,
521 multiple cores or multiple books.
523 source kernel/Kconfig.hz
530 bool "kexec file based system call"
534 depends on CRYPTO_SHA256
535 depends on CRYPTO_SHA256_S390
537 Enable the kexec file based system call. In contrast to the normal
538 kexec system call this system call takes file descriptors for the
539 kernel and initramfs as arguments.
541 config ARCH_HAS_KEXEC_PURGATORY
543 depends on KEXEC_FILE
547 prompt "s390 architectural random number generation API"
549 Enable the s390 architectural random number generation API
550 to provide random data for all consumers within the Linux
553 When enabled the arch_random_* functions declared in linux/random.h
554 are implemented. The implementation is based on the s390 CPACF
555 instruction subfunction TRNG which provides a real true random
562 prompt "Enable modified branch prediction for the kernel by default"
564 If this option is selected the kernel will switch to a modified
565 branch prediction mode if the firmware interface is available.
566 The modified branch prediction mode improves the behaviour in
567 regard to speculative execution.
569 With the option enabled the kernel parameter "nobp=0" or "nospec"
570 can be used to run the kernel in the normal branch prediction mode.
572 With the option disabled the modified branch prediction mode is
573 enabled with the "nobp=1" kernel parameter.
579 prompt "Avoid speculative indirect branches in the kernel"
581 Compile the kernel with the expoline compiler options to guard
582 against kernel-to-user data leaks by avoiding speculative indirect
584 Requires a compiler with -mindirect-branch=thunk support for full
585 protection. The kernel may run slower.
590 prompt "Expoline default"
592 default EXPOLINE_FULL
595 bool "spectre_v2=off"
598 bool "spectre_v2=auto"
609 config ARCH_SPARSEMEM_ENABLE
611 select SPARSEMEM_VMEMMAP_ENABLE
612 select SPARSEMEM_VMEMMAP
614 config ARCH_SPARSEMEM_DEFAULT
617 config ARCH_SELECT_MEMORY_MODEL
620 config ARCH_ENABLE_MEMORY_HOTPLUG
621 def_bool y if SPARSEMEM
623 config ARCH_ENABLE_MEMORY_HOTREMOVE
626 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
629 config FORCE_MAX_ZONEORDER
633 config MAX_PHYSMEM_BITS
634 int "Maximum size of supported physical memory in bits (42-53)"
638 This option specifies the maximum supported size of physical memory
639 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
640 Increasing the number of bits also increases the kernel image size.
641 By default 46 bits (64TB) are supported.
645 prompt "Pack kernel stack"
647 This option enables the compiler option -mkernel-backchain if it
648 is available. If the option is available the compiler supports
649 the new stack layout which dramatically reduces the minimum stack
650 frame size. With an old compiler a non-leaf function needs a
651 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
652 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
653 and 24 byte on 64 bit.
655 Say Y if you are unsure.
659 depends on !VMAP_STACK
660 prompt "Detect kernel stack overflow"
662 This option enables the compiler option -mstack-guard and
663 -mstack-size if they are available. If the compiler supports them
664 it will emit additional code to each function prolog to trigger
665 an illegal operation if the kernel stack is about to overflow.
667 Say N if you are unsure.
670 int "Size of the guard area (128-1024)"
672 depends on CHECK_STACK
675 This allows you to specify the size of the guard area at the lower
676 end of the kernel stack. If the kernel stack points into the guard
677 area on function entry an illegal operation is triggered. The size
678 needs to be a power of 2. Please keep in mind that the size of an
679 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
680 The minimum size for the stack guard should be 256 for 31 bit and
683 config WARN_DYNAMIC_STACK
685 prompt "Emit compiler warnings for function with dynamic stack usage"
687 This option enables the compiler option -mwarn-dynamicstack. If the
688 compiler supports this options generates warnings for functions
689 that dynamically allocate stack space using alloca.
691 Say N if you are unsure.
699 prompt "QDIO support"
701 This driver provides the Queued Direct I/O base support for
704 To compile this driver as a module, choose M here: the
705 module will be called qdio.
714 select NEED_DMA_MAP_STATE
715 select NEED_SG_DMA_LENGTH
722 config PCI_NR_FUNCTIONS
723 int "Maximum number of PCI functions (1-4096)"
727 This allows you to specify the maximum number of PCI functions which
728 this kernel will support.
730 source "drivers/pci/Kconfig"
742 prompt "Support for CHSC subchannels"
744 This driver allows usage of CHSC subchannels. A CHSC subchannel
745 is usually present on LPAR only.
746 The driver creates a device /dev/chsc, which may be used to
747 obtain I/O configuration information about the machine and
748 to issue asynchronous chsc commands (DANGEROUS).
749 You will usually only want to use this interface on a special
750 LPAR designated for system management.
752 To compile this driver as a module, choose M here: the
753 module will be called chsc_sch.
759 prompt "SCM bus driver"
761 Bus driver for Storage Class Memory.
765 prompt "Support for EADM subchannels"
768 This driver allows usage of EADM subchannels. EADM subchannels act
769 as a communication vehicle for SCM increments.
771 To compile this driver as a module, choose M here: the
772 module will be called eadm_sch.
776 prompt "Support for VFIO-CCW subchannels"
777 depends on S390_CCW_IOMMU && VFIO_MDEV
779 This driver allows usage of I/O subchannels via VFIO-CCW.
781 To compile this driver as a module, choose M here: the
782 module will be called vfio_ccw.
786 prompt "VFIO support for AP devices"
787 depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
789 This driver grants access to Adjunct Processor (AP) devices
790 via the VFIO mediated device interface.
792 To compile this driver as a module, choose M here: the module
793 will be called vfio_ap.
800 bool "kernel crash dumps"
804 Generate crash dump after being started by kexec.
805 Crash dump kernels are loaded in the main kernel with kexec-tools
806 into a specially reserved region and then later executed after
807 a crash by kdump/kexec.
808 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
809 This option also enables s390 zfcpdump.
810 See also <file:Documentation/s390/zfcpdump.txt>
816 prompt "Enable seccomp to safely compute untrusted bytecode"
819 This kernel feature is useful for number crunching applications
820 that may need to compute untrusted bytecode during their
821 execution. By using pipes or other transports made available to
822 the process as file descriptors supporting the read/write
823 syscalls, it's possible to isolate those applications in
824 their own address space using seccomp. Once seccomp is
825 enabled via /proc/<pid>/seccomp, it cannot be disabled
826 and the task is only allowed to execute a few safe syscalls
827 defined by each seccomp mode.
831 menu "Power Management"
833 config ARCH_HIBERNATION_POSSIBLE
836 source "kernel/power/Kconfig"
848 default (SMC || CCWGROUP)
850 menu "Virtualization"
854 prompt "Pseudo page fault support"
856 Select this option, if you want to use PFAULT pseudo page fault
857 handling under VM. If running native or in LPAR, this option
858 has no effect. If your VM does not support PFAULT, PAGEEX
859 pseudo page fault handling will be used.
860 Note that VM 4.2 supports PFAULT but has a bug in its
861 implementation that causes some problems.
862 Everybody who wants to run Linux under VM != VM4.2 should select
867 prompt "Cooperative memory management"
869 Select this option, if you want to enable the kernel interface
870 to reduce the memory size of the system. This is accomplished
871 by allocating pages of memory and put them "on hold". This only
872 makes sense for a system running under VM where the unused pages
873 will be reused by VM for other guest systems. The interface
874 allows an external monitor to balance memory of many systems.
875 Everybody who wants to run Linux under VM should select this
880 prompt "IUCV special message interface to cooperative memory management"
881 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
883 Select this option to enable the special message interface to
884 the cooperative memory management.
888 prompt "Linux - VM Monitor Stream, base infrastructure"
891 This provides a kernel interface for creating and updating z/VM APPLDATA
892 monitor records. The monitor records are updated at certain time
893 intervals, once the timer is started.
894 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
895 i.e. enables or disables monitoring on the Linux side.
896 A custom interval value (in seconds) can be written to
897 /proc/appldata/interval.
899 Defaults are 60 seconds interval and timer off.
900 The /proc entries can also be read from, showing the current settings.
904 prompt "Monitor memory management statistics"
905 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
907 This provides memory management related data to the Linux - VM Monitor
908 Stream, like paging/swapping rate, memory utilisation, etc.
909 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
910 APPLDATA monitor record, i.e. enables or disables monitoring this record
914 The /proc entry can also be read from, showing the current settings.
916 This can also be compiled as a module, which will be called
921 prompt "Monitor OS statistics"
922 depends on APPLDATA_BASE
924 This provides OS related data to the Linux - VM Monitor Stream, like
925 CPU utilisation, etc.
926 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
927 APPLDATA monitor record, i.e. enables or disables monitoring this record
931 This can also be compiled as a module, which will be called
934 config APPLDATA_NET_SUM
936 prompt "Monitor overall network statistics"
937 depends on APPLDATA_BASE && NET
939 This provides network related data to the Linux - VM Monitor Stream,
940 currently there is only a total sum of network I/O statistics, no
942 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
943 APPLDATA monitor record, i.e. enables or disables monitoring this record
947 This can also be compiled as a module, which will be called
952 prompt "s390 hypervisor file system support"
953 select SYS_HYPERVISOR
955 This is a virtual file system intended to provide accounting
956 information in an s390 hypervisor environment.
958 source "arch/s390/kvm/Kconfig"
962 prompt "s390 support for virtio devices"
964 select VIRTUALIZATION
966 select VIRTIO_CONSOLE
968 Enabling this option adds support for virtio based paravirtual device
971 Select this option if you want to run the kernel as a guest under