1 # SPDX-License-Identifier: GPL-2.0
11 config STACKTRACE_SUPPORT
14 config ARCH_HAS_ILOG2_U32
17 config ARCH_HAS_ILOG2_U64
20 config GENERIC_HWEIGHT
26 config GENERIC_BUG_RELATIVE_POINTERS
29 config GENERIC_LOCKBREAK
30 def_bool y if PREEMPTION
44 config ARCH_SUPPORTS_UPROBES
47 config KASAN_SHADOW_OFFSET
50 default 0x1C000000000000
55 # Note: keep this list sorted alphabetically
57 imply IMA_SECURE_AND_OR_TRUSTED_BOOT
58 select ARCH_32BIT_USTAT_F_TINODE
59 select ARCH_BINFMT_ELF_STATE
60 select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
61 select ARCH_ENABLE_MEMORY_HOTREMOVE
62 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
63 select ARCH_HAS_DEBUG_VM_PGTABLE
64 select ARCH_HAS_DEBUG_WX
65 select ARCH_HAS_DEVMEM_IS_ALLOWED
66 select ARCH_HAS_ELF_RANDOMIZE
67 select ARCH_HAS_FORCE_DMA_UNENCRYPTED
68 select ARCH_HAS_FORTIFY_SOURCE
69 select ARCH_HAS_GCOV_PROFILE_ALL
70 select ARCH_HAS_GIGANTIC_PAGE
72 select ARCH_HAS_MEM_ENCRYPT
73 select ARCH_HAS_PTE_SPECIAL
74 select ARCH_HAS_SCALED_CPUTIME
75 select ARCH_HAS_SET_MEMORY
76 select ARCH_HAS_STRICT_KERNEL_RWX
77 select ARCH_HAS_STRICT_MODULE_RWX
78 select ARCH_HAS_SYSCALL_WRAPPER
79 select ARCH_HAS_UBSAN_SANITIZE_ALL
80 select ARCH_HAS_VDSO_DATA
81 select ARCH_HAVE_NMI_SAFE_CMPXCHG
82 select ARCH_INLINE_READ_LOCK
83 select ARCH_INLINE_READ_LOCK_BH
84 select ARCH_INLINE_READ_LOCK_IRQ
85 select ARCH_INLINE_READ_LOCK_IRQSAVE
86 select ARCH_INLINE_READ_TRYLOCK
87 select ARCH_INLINE_READ_UNLOCK
88 select ARCH_INLINE_READ_UNLOCK_BH
89 select ARCH_INLINE_READ_UNLOCK_IRQ
90 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
91 select ARCH_INLINE_SPIN_LOCK
92 select ARCH_INLINE_SPIN_LOCK_BH
93 select ARCH_INLINE_SPIN_LOCK_IRQ
94 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
95 select ARCH_INLINE_SPIN_TRYLOCK
96 select ARCH_INLINE_SPIN_TRYLOCK_BH
97 select ARCH_INLINE_SPIN_UNLOCK
98 select ARCH_INLINE_SPIN_UNLOCK_BH
99 select ARCH_INLINE_SPIN_UNLOCK_IRQ
100 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
101 select ARCH_INLINE_WRITE_LOCK
102 select ARCH_INLINE_WRITE_LOCK_BH
103 select ARCH_INLINE_WRITE_LOCK_IRQ
104 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
105 select ARCH_INLINE_WRITE_TRYLOCK
106 select ARCH_INLINE_WRITE_UNLOCK
107 select ARCH_INLINE_WRITE_UNLOCK_BH
108 select ARCH_INLINE_WRITE_UNLOCK_IRQ
109 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
110 select ARCH_STACKWALK
111 select ARCH_SUPPORTS_ATOMIC_RMW
112 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
113 select ARCH_SUPPORTS_HUGETLBFS
114 select ARCH_SUPPORTS_NUMA_BALANCING
115 select ARCH_USE_BUILTIN_BSWAP
116 select ARCH_USE_CMPXCHG_LOCKREF
117 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
118 select ARCH_WANTS_NO_INSTR
119 select ARCH_WANT_DEFAULT_BPF_JIT
120 select ARCH_WANT_IPC_PARSE_VERSION
121 select BUILDTIME_TABLE_SORT
122 select CLONE_BACKWARDS2
123 select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
124 select DMA_OPS if PCI
125 select DYNAMIC_FTRACE if FUNCTION_TRACER
126 select GENERIC_ALLOCATOR
127 select GENERIC_CPU_AUTOPROBE
128 select GENERIC_CPU_VULNERABILITIES
130 select GENERIC_FIND_FIRST_BIT
131 select GENERIC_GETTIMEOFDAY
132 select GENERIC_PTDUMP
133 select GENERIC_SMP_IDLE_THREAD
134 select GENERIC_TIME_VSYSCALL
135 select GENERIC_VDSO_TIME_NS
136 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
137 select HAVE_ARCH_AUDITSYSCALL
138 select HAVE_ARCH_JUMP_LABEL
139 select HAVE_ARCH_JUMP_LABEL_RELATIVE
140 select HAVE_ARCH_KASAN
141 select HAVE_ARCH_KASAN_VMALLOC
142 select HAVE_ARCH_KCSAN
143 select HAVE_ARCH_KFENCE
144 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
145 select HAVE_ARCH_SECCOMP_FILTER
146 select HAVE_ARCH_SOFT_DIRTY
147 select HAVE_ARCH_TRACEHOOK
148 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
149 select HAVE_ARCH_VMAP_STACK
150 select HAVE_ASM_MODVERSIONS
151 select HAVE_CMPXCHG_DOUBLE
152 select HAVE_CMPXCHG_LOCAL
153 select HAVE_DEBUG_KMEMLEAK
154 select HAVE_DMA_CONTIGUOUS
155 select HAVE_DYNAMIC_FTRACE
156 select HAVE_DYNAMIC_FTRACE_WITH_REGS
157 select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
158 select HAVE_EFFICIENT_UNALIGNED_ACCESS
161 select HAVE_FTRACE_MCOUNT_RECORD
162 select HAVE_FUNCTION_ERROR_INJECTION
163 select HAVE_FUNCTION_GRAPH_TRACER
164 select HAVE_FUNCTION_TRACER
165 select HAVE_FUTEX_CMPXCHG if FUTEX
166 select HAVE_GCC_PLUGINS
167 select HAVE_GENERIC_VDSO
168 select HAVE_IOREMAP_PROT if PCI
169 select HAVE_KERNEL_BZIP2
170 select HAVE_KERNEL_GZIP
171 select HAVE_KERNEL_LZ4
172 select HAVE_KERNEL_LZMA
173 select HAVE_KERNEL_LZO
174 select HAVE_KERNEL_UNCOMPRESSED
175 select HAVE_KERNEL_XZ
176 select HAVE_KERNEL_ZSTD
178 select HAVE_KPROBES_ON_FTRACE
179 select HAVE_KRETPROBES
181 select HAVE_LIVEPATCH
182 select HAVE_MEMBLOCK_PHYS_MAP
183 select HAVE_MOD_ARCH_SPECIFIC
185 select HAVE_NOP_MCOUNT
187 select HAVE_PERF_EVENTS
188 select HAVE_PERF_REGS
189 select HAVE_PERF_USER_STACK_DUMP
190 select HAVE_REGS_AND_STACK_ACCESS_API
191 select HAVE_RELIABLE_STACKTRACE
193 select HAVE_SOFTIRQ_ON_OWN_STACK
194 select HAVE_SYSCALL_TRACEPOINTS
195 select HAVE_VIRT_CPU_ACCOUNTING
196 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
197 select IOMMU_HELPER if PCI
198 select IOMMU_SUPPORT if PCI
199 select MMU_GATHER_NO_GATHER
200 select MMU_GATHER_RCU_TABLE_FREE
201 select MODULES_USE_ELF_RELA
202 select NEED_DMA_MAP_STATE if PCI
203 select NEED_SG_DMA_LENGTH if PCI
205 select OLD_SIGSUSPEND3
206 select PCI_DOMAINS if PCI
207 select PCI_MSI if PCI
208 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
211 select SYSCTL_EXCEPTION_TRACE
212 select THREAD_INFO_IN_TASK
213 select TRACE_IRQFLAGS_SUPPORT
215 select VIRT_CPU_ACCOUNTING
217 # Note: keep the above list sorted alphabetically
219 config SCHED_OMIT_FRAME_POINTER
222 config PGTABLE_LEVELS
226 source "kernel/livepatch/Kconfig"
228 menu "Processor type and features"
230 config HAVE_MARCH_Z900_FEATURES
233 config HAVE_MARCH_Z990_FEATURES
235 select HAVE_MARCH_Z900_FEATURES
237 config HAVE_MARCH_Z9_109_FEATURES
239 select HAVE_MARCH_Z990_FEATURES
241 config HAVE_MARCH_Z10_FEATURES
243 select HAVE_MARCH_Z9_109_FEATURES
245 config HAVE_MARCH_Z196_FEATURES
247 select HAVE_MARCH_Z10_FEATURES
249 config HAVE_MARCH_ZEC12_FEATURES
251 select HAVE_MARCH_Z196_FEATURES
253 config HAVE_MARCH_Z13_FEATURES
255 select HAVE_MARCH_ZEC12_FEATURES
257 config HAVE_MARCH_Z14_FEATURES
259 select HAVE_MARCH_Z13_FEATURES
261 config HAVE_MARCH_Z15_FEATURES
263 select HAVE_MARCH_Z14_FEATURES
266 prompt "Processor type"
270 bool "IBM zSeries model z800 and z900"
271 select HAVE_MARCH_Z900_FEATURES
272 depends on $(cc-option,-march=z900)
274 Select this to enable optimizations for model z800/z900 (2064 and
275 2066 series). This will enable some optimizations that are not
276 available on older ESA/390 (31 Bit) only CPUs.
279 bool "IBM zSeries model z890 and z990"
280 select HAVE_MARCH_Z990_FEATURES
281 depends on $(cc-option,-march=z990)
283 Select this to enable optimizations for model z890/z990 (2084 and
284 2086 series). The kernel will be slightly faster but will not work
289 select HAVE_MARCH_Z9_109_FEATURES
290 depends on $(cc-option,-march=z9-109)
292 Select this to enable optimizations for IBM System z9 (2094 and
293 2096 series). The kernel will be slightly faster but will not work
297 bool "IBM System z10"
298 select HAVE_MARCH_Z10_FEATURES
299 depends on $(cc-option,-march=z10)
301 Select this to enable optimizations for IBM System z10 (2097 and
302 2098 series). The kernel will be slightly faster but will not work
306 bool "IBM zEnterprise 114 and 196"
307 select HAVE_MARCH_Z196_FEATURES
308 depends on $(cc-option,-march=z196)
310 Select this to enable optimizations for IBM zEnterprise 114 and 196
311 (2818 and 2817 series). The kernel will be slightly faster but will
312 not work on older machines.
315 bool "IBM zBC12 and zEC12"
316 select HAVE_MARCH_ZEC12_FEATURES
317 depends on $(cc-option,-march=zEC12)
319 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
320 2827 series). The kernel will be slightly faster but will not work on
324 bool "IBM z13s and z13"
325 select HAVE_MARCH_Z13_FEATURES
326 depends on $(cc-option,-march=z13)
328 Select this to enable optimizations for IBM z13s and z13 (2965 and
329 2964 series). The kernel will be slightly faster but will not work on
333 bool "IBM z14 ZR1 and z14"
334 select HAVE_MARCH_Z14_FEATURES
335 depends on $(cc-option,-march=z14)
337 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
338 and 3906 series). The kernel will be slightly faster but will not
339 work on older machines.
343 select HAVE_MARCH_Z15_FEATURES
344 depends on $(cc-option,-march=z15)
346 Select this to enable optimizations for IBM z15 (8562
347 and 8561 series). The kernel will be slightly faster but will not
348 work on older machines.
352 config MARCH_Z900_TUNE
353 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
355 config MARCH_Z990_TUNE
356 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
358 config MARCH_Z9_109_TUNE
359 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
361 config MARCH_Z10_TUNE
362 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
364 config MARCH_Z196_TUNE
365 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
367 config MARCH_ZEC12_TUNE
368 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
370 config MARCH_Z13_TUNE
371 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
373 config MARCH_Z14_TUNE
374 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
376 config MARCH_Z15_TUNE
377 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
380 prompt "Tune code generation"
383 Cause the compiler to tune (-mtune) the generated code for a machine.
384 This will make the code run faster on the selected machine but
385 somewhat slower on other machines.
386 This option only changes how the compiler emits instructions, not the
387 selection of instructions itself, so the resulting kernel will run on
393 Tune the generated code for the target processor for which the kernel
397 bool "IBM zSeries model z800 and z900"
398 depends on $(cc-option,-mtune=z900)
401 bool "IBM zSeries model z890 and z990"
402 depends on $(cc-option,-mtune=z990)
406 depends on $(cc-option,-mtune=z9-109)
409 bool "IBM System z10"
410 depends on $(cc-option,-mtune=z10)
413 bool "IBM zEnterprise 114 and 196"
414 depends on $(cc-option,-mtune=z196)
417 bool "IBM zBC12 and zEC12"
418 depends on $(cc-option,-mtune=zEC12)
421 bool "IBM z13s and z13"
422 depends on $(cc-option,-mtune=z13)
425 bool "IBM z14 ZR1 and z14"
426 depends on $(cc-option,-mtune=z14)
430 depends on $(cc-option,-mtune=z15)
439 prompt "Kernel support for 31 bit emulation"
440 select ARCH_WANT_OLD_COMPAT_IPC
441 select COMPAT_OLD_SIGACTION
444 depends on !CC_IS_CLANG
446 Select this option if you want to enable your system kernel to
447 handle system-calls from ELF binaries for 31 bit ESA. This option
448 (and some other stuff like libraries and such) is needed for
449 executing 31 bit applications. It is safe to say "Y".
451 config SYSVIPC_COMPAT
452 def_bool y if COMPAT && SYSVIPC
458 int "Maximum number of CPUs (2-512)"
462 This allows you to specify the maximum number of CPUs which this
463 kernel will support. The maximum supported value is 512 and the
464 minimum value which makes sense is 2.
466 This is purely to save memory - each supported CPU adds
467 approximately sixteen kilobytes to the kernel image.
474 depends on SCHED_TOPOLOGY
479 This option adds NUMA support to the kernel.
498 config SCHED_TOPOLOGY
500 prompt "Topology scheduler support"
506 Topology scheduler support improves the CPU scheduler's decision
507 making when dealing with machines that have multi-threading,
508 multiple cores or multiple books.
510 source "kernel/Kconfig.hz"
517 bool "kexec file based system call"
520 depends on CRYPTO_SHA256
521 depends on CRYPTO_SHA256_S390
523 Enable the kexec file based system call. In contrast to the normal
524 kexec system call this system call takes file descriptors for the
525 kernel and initramfs as arguments.
527 config ARCH_HAS_KEXEC_PURGATORY
529 depends on KEXEC_FILE
532 bool "Verify kernel signature during kexec_file_load() syscall"
533 depends on KEXEC_FILE && MODULE_SIG_FORMAT
535 This option makes kernel signature verification mandatory for
536 the kexec_file_load() syscall.
538 In addition to that option, you need to enable signature
539 verification for the corresponding kernel image type being
540 loaded in order for this to work.
544 prompt "s390 architectural random number generation API"
546 Enable the s390 architectural random number generation API
547 to provide random data for all consumers within the Linux
550 When enabled the arch_random_* functions declared in linux/random.h
551 are implemented. The implementation is based on the s390 CPACF
552 instruction subfunction TRNG which provides a real true random
559 prompt "Enable modified branch prediction for the kernel by default"
561 If this option is selected the kernel will switch to a modified
562 branch prediction mode if the firmware interface is available.
563 The modified branch prediction mode improves the behaviour in
564 regard to speculative execution.
566 With the option enabled the kernel parameter "nobp=0" or "nospec"
567 can be used to run the kernel in the normal branch prediction mode.
569 With the option disabled the modified branch prediction mode is
570 enabled with the "nobp=1" kernel parameter.
576 prompt "Avoid speculative indirect branches in the kernel"
578 Compile the kernel with the expoline compiler options to guard
579 against kernel-to-user data leaks by avoiding speculative indirect
581 Requires a compiler with -mindirect-branch=thunk support for full
582 protection. The kernel may run slower.
587 prompt "Expoline default"
589 default EXPOLINE_FULL
592 bool "spectre_v2=off"
595 bool "spectre_v2=auto"
603 bool "Build a relocatable kernel"
604 select MODULE_REL_CRCS if MODVERSIONS
607 This builds a kernel image that retains relocation information
608 so it can be loaded at an arbitrary address.
609 The kernel is linked as a position-independent executable (PIE)
610 and contains dynamic relocations which are processed early in the
612 The relocations make the kernel image about 15% larger (compressed
613 10%), but are discarded at runtime.
615 config RANDOMIZE_BASE
616 bool "Randomize the address of the kernel image (KASLR)"
617 depends on RELOCATABLE
620 In support of Kernel Address Space Layout Randomization (KASLR),
621 this randomizes the address at which the kernel image is loaded,
622 as a security feature that deters exploit attempts relying on
623 knowledge of the location of kernel internals.
629 config ARCH_SPARSEMEM_ENABLE
631 select SPARSEMEM_VMEMMAP_ENABLE
632 select SPARSEMEM_VMEMMAP
634 config ARCH_SPARSEMEM_DEFAULT
637 config MAX_PHYSMEM_BITS
638 int "Maximum size of supported physical memory in bits (42-53)"
642 This option specifies the maximum supported size of physical memory
643 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
644 Increasing the number of bits also increases the kernel image size.
645 By default 46 bits (64TB) are supported.
649 prompt "Pack kernel stack"
651 This option enables the compiler option -mkernel-backchain if it
652 is available. If the option is available the compiler supports
653 the new stack layout which dramatically reduces the minimum stack
654 frame size. With an old compiler a non-leaf function needs a
655 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
656 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
657 and 24 byte on 64 bit.
659 Say Y if you are unsure.
663 depends on !VMAP_STACK
664 prompt "Detect kernel stack overflow"
666 This option enables the compiler option -mstack-guard and
667 -mstack-size if they are available. If the compiler supports them
668 it will emit additional code to each function prolog to trigger
669 an illegal operation if the kernel stack is about to overflow.
671 Say N if you are unsure.
674 int "Size of the guard area (128-1024)"
676 depends on CHECK_STACK
679 This allows you to specify the size of the guard area at the lower
680 end of the kernel stack. If the kernel stack points into the guard
681 area on function entry an illegal operation is triggered. The size
682 needs to be a power of 2. Please keep in mind that the size of an
683 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
684 The minimum size for the stack guard should be 256 for 31 bit and
693 prompt "QDIO support"
695 This driver provides the Queued Direct I/O base support for
698 To compile this driver as a module, choose M here: the
699 module will be called qdio.
705 config PCI_NR_FUNCTIONS
706 int "Maximum number of PCI functions (1-4096)"
710 This allows you to specify the maximum number of PCI functions which
711 this kernel will support.
720 prompt "Support for CHSC subchannels"
722 This driver allows usage of CHSC subchannels. A CHSC subchannel
723 is usually present on LPAR only.
724 The driver creates a device /dev/chsc, which may be used to
725 obtain I/O configuration information about the machine and
726 to issue asynchronous chsc commands (DANGEROUS).
727 You will usually only want to use this interface on a special
728 LPAR designated for system management.
730 To compile this driver as a module, choose M here: the
731 module will be called chsc_sch.
737 prompt "SCM bus driver"
739 Bus driver for Storage Class Memory.
743 prompt "Support for EADM subchannels"
746 This driver allows usage of EADM subchannels. EADM subchannels act
747 as a communication vehicle for SCM increments.
749 To compile this driver as a module, choose M here: the
750 module will be called eadm_sch.
754 prompt "Support for VFIO-CCW subchannels"
755 depends on S390_CCW_IOMMU && VFIO_MDEV
757 This driver allows usage of I/O subchannels via VFIO-CCW.
759 To compile this driver as a module, choose M here: the
760 module will be called vfio_ccw.
764 prompt "VFIO support for AP devices"
765 depends on S390_AP_IOMMU && VFIO_MDEV && KVM
768 This driver grants access to Adjunct Processor (AP) devices
769 via the VFIO mediated device interface.
771 To compile this driver as a module, choose M here: the module
772 will be called vfio_ap.
779 bool "kernel crash dumps"
782 Generate crash dump after being started by kexec.
783 Crash dump kernels are loaded in the main kernel with kexec-tools
784 into a specially reserved region and then later executed after
785 a crash by kdump/kexec.
786 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
787 This option also enables s390 zfcpdump.
788 See also <file:Documentation/s390/zfcpdump.rst>
797 default (SMC || CCWGROUP)
799 menu "Virtualization"
801 config PROTECTED_VIRTUALIZATION_GUEST
803 prompt "Protected virtualization guest support"
804 select ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
806 Select this option, if you want to be able to run this
807 kernel as a protected virtualization KVM guest.
808 Protected virtualization capable machines have a mini hypervisor
809 located at machine level (an ultravisor). With help of the
810 Ultravisor, KVM will be able to run "protected" VMs, special
811 VMs whose memory and management data are unavailable to KVM.
815 prompt "Pseudo page fault support"
817 Select this option, if you want to use PFAULT pseudo page fault
818 handling under VM. If running native or in LPAR, this option
819 has no effect. If your VM does not support PFAULT, PAGEEX
820 pseudo page fault handling will be used.
821 Note that VM 4.2 supports PFAULT but has a bug in its
822 implementation that causes some problems.
823 Everybody who wants to run Linux under VM != VM4.2 should select
828 prompt "Cooperative memory management"
830 Select this option, if you want to enable the kernel interface
831 to reduce the memory size of the system. This is accomplished
832 by allocating pages of memory and put them "on hold". This only
833 makes sense for a system running under VM where the unused pages
834 will be reused by VM for other guest systems. The interface
835 allows an external monitor to balance memory of many systems.
836 Everybody who wants to run Linux under VM should select this
841 prompt "IUCV special message interface to cooperative memory management"
842 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
844 Select this option to enable the special message interface to
845 the cooperative memory management.
849 prompt "Linux - VM Monitor Stream, base infrastructure"
850 depends on PROC_SYSCTL
852 This provides a kernel interface for creating and updating z/VM APPLDATA
853 monitor records. The monitor records are updated at certain time
854 intervals, once the timer is started.
855 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
856 i.e. enables or disables monitoring on the Linux side.
857 A custom interval value (in seconds) can be written to
858 /proc/appldata/interval.
860 Defaults are 60 seconds interval and timer off.
861 The /proc entries can also be read from, showing the current settings.
865 prompt "Monitor memory management statistics"
866 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
868 This provides memory management related data to the Linux - VM Monitor
869 Stream, like paging/swapping rate, memory utilisation, etc.
870 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
871 APPLDATA monitor record, i.e. enables or disables monitoring this record
875 The /proc entry can also be read from, showing the current settings.
877 This can also be compiled as a module, which will be called
882 prompt "Monitor OS statistics"
883 depends on APPLDATA_BASE
885 This provides OS related data to the Linux - VM Monitor Stream, like
886 CPU utilisation, etc.
887 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
888 APPLDATA monitor record, i.e. enables or disables monitoring this record
892 This can also be compiled as a module, which will be called
895 config APPLDATA_NET_SUM
897 prompt "Monitor overall network statistics"
898 depends on APPLDATA_BASE && NET
900 This provides network related data to the Linux - VM Monitor Stream,
901 currently there is only a total sum of network I/O statistics, no
903 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
904 APPLDATA monitor record, i.e. enables or disables monitoring this record
908 This can also be compiled as a module, which will be called
913 prompt "s390 hypervisor file system support"
914 select SYS_HYPERVISOR
916 This is a virtual file system intended to provide accounting
917 information in an s390 hypervisor environment.
919 source "arch/s390/kvm/Kconfig"
923 prompt "s390 support for virtio devices"
925 select VIRTUALIZATION
928 Enabling this option adds support for virtio based paravirtual device
931 Select this option if you want to run the kernel as a guest under
938 config S390_UNWIND_SELFTEST
940 prompt "Test unwind functions"
942 This option enables s390 specific stack unwinder testing kernel
943 module. This option is not useful for distributions or general
944 kernels, but only for kernel developers working on architecture code.
946 Say N if you are unsure.