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 ALTERNATE_USER_ADDRESS_SPACE
59 select ARCH_32BIT_USTAT_F_TINODE
60 select ARCH_BINFMT_ELF_STATE
61 select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
62 select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
63 select ARCH_ENABLE_MEMORY_HOTREMOVE
64 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
65 select ARCH_HAS_CURRENT_STACK_POINTER
66 select ARCH_HAS_DEBUG_VM_PGTABLE
67 select ARCH_HAS_DEBUG_WX
68 select ARCH_HAS_DEVMEM_IS_ALLOWED
69 select ARCH_HAS_ELF_RANDOMIZE
70 select ARCH_HAS_FORCE_DMA_UNENCRYPTED
71 select ARCH_HAS_FORTIFY_SOURCE
72 select ARCH_HAS_GCOV_PROFILE_ALL
73 select ARCH_HAS_GIGANTIC_PAGE
75 select ARCH_HAS_MEM_ENCRYPT
76 select ARCH_HAS_PTE_SPECIAL
77 select ARCH_HAS_SCALED_CPUTIME
78 select ARCH_HAS_SET_MEMORY
79 select ARCH_HAS_STRICT_KERNEL_RWX
80 select ARCH_HAS_STRICT_MODULE_RWX
81 select ARCH_HAS_SYSCALL_WRAPPER
82 select ARCH_HAS_UBSAN_SANITIZE_ALL
83 select ARCH_HAS_VDSO_DATA
84 select ARCH_HAVE_NMI_SAFE_CMPXCHG
85 select ARCH_INLINE_READ_LOCK
86 select ARCH_INLINE_READ_LOCK_BH
87 select ARCH_INLINE_READ_LOCK_IRQ
88 select ARCH_INLINE_READ_LOCK_IRQSAVE
89 select ARCH_INLINE_READ_TRYLOCK
90 select ARCH_INLINE_READ_UNLOCK
91 select ARCH_INLINE_READ_UNLOCK_BH
92 select ARCH_INLINE_READ_UNLOCK_IRQ
93 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
94 select ARCH_INLINE_SPIN_LOCK
95 select ARCH_INLINE_SPIN_LOCK_BH
96 select ARCH_INLINE_SPIN_LOCK_IRQ
97 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
98 select ARCH_INLINE_SPIN_TRYLOCK
99 select ARCH_INLINE_SPIN_TRYLOCK_BH
100 select ARCH_INLINE_SPIN_UNLOCK
101 select ARCH_INLINE_SPIN_UNLOCK_BH
102 select ARCH_INLINE_SPIN_UNLOCK_IRQ
103 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
104 select ARCH_INLINE_WRITE_LOCK
105 select ARCH_INLINE_WRITE_LOCK_BH
106 select ARCH_INLINE_WRITE_LOCK_IRQ
107 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
108 select ARCH_INLINE_WRITE_TRYLOCK
109 select ARCH_INLINE_WRITE_UNLOCK
110 select ARCH_INLINE_WRITE_UNLOCK_BH
111 select ARCH_INLINE_WRITE_UNLOCK_IRQ
112 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
113 select ARCH_STACKWALK
114 select ARCH_SUPPORTS_ATOMIC_RMW
115 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
116 select ARCH_SUPPORTS_HUGETLBFS
117 select ARCH_SUPPORTS_NUMA_BALANCING
118 select ARCH_USE_BUILTIN_BSWAP
119 select ARCH_USE_CMPXCHG_LOCKREF
120 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
121 select ARCH_WANTS_NO_INSTR
122 select ARCH_WANT_DEFAULT_BPF_JIT
123 select ARCH_WANT_IPC_PARSE_VERSION
124 select BUILDTIME_TABLE_SORT
125 select CLONE_BACKWARDS2
126 select DMA_OPS if PCI
127 select DYNAMIC_FTRACE if FUNCTION_TRACER
128 select GENERIC_ALLOCATOR
129 select GENERIC_CPU_AUTOPROBE
130 select GENERIC_CPU_VULNERABILITIES
132 select GENERIC_GETTIMEOFDAY
133 select GENERIC_PTDUMP
134 select GENERIC_SMP_IDLE_THREAD
135 select GENERIC_TIME_VSYSCALL
136 select GENERIC_VDSO_TIME_NS
137 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
138 select HAVE_ARCH_AUDITSYSCALL
139 select HAVE_ARCH_JUMP_LABEL
140 select HAVE_ARCH_JUMP_LABEL_RELATIVE
141 select HAVE_ARCH_KASAN
142 select HAVE_ARCH_KASAN_VMALLOC
143 select HAVE_ARCH_KCSAN
144 select HAVE_ARCH_KFENCE
145 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
146 select HAVE_ARCH_SECCOMP_FILTER
147 select HAVE_ARCH_SOFT_DIRTY
148 select HAVE_ARCH_TRACEHOOK
149 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
150 select HAVE_ARCH_VMAP_STACK
151 select HAVE_ASM_MODVERSIONS
152 select HAVE_CMPXCHG_DOUBLE
153 select HAVE_CMPXCHG_LOCAL
154 select HAVE_DEBUG_KMEMLEAK
155 select HAVE_DMA_CONTIGUOUS
156 select HAVE_DYNAMIC_FTRACE
157 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
158 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
159 select HAVE_DYNAMIC_FTRACE_WITH_REGS
160 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
161 select HAVE_EFFICIENT_UNALIGNED_ACCESS
164 select HAVE_FTRACE_MCOUNT_RECORD
165 select HAVE_FUNCTION_ARG_ACCESS_API
166 select HAVE_FUNCTION_ERROR_INJECTION
167 select HAVE_FUNCTION_GRAPH_TRACER
168 select HAVE_FUNCTION_TRACER
169 select HAVE_GCC_PLUGINS
170 select HAVE_GENERIC_VDSO
171 select HAVE_IOREMAP_PROT if PCI
172 select HAVE_KERNEL_BZIP2
173 select HAVE_KERNEL_GZIP
174 select HAVE_KERNEL_LZ4
175 select HAVE_KERNEL_LZMA
176 select HAVE_KERNEL_LZO
177 select HAVE_KERNEL_UNCOMPRESSED
178 select HAVE_KERNEL_XZ
179 select HAVE_KERNEL_ZSTD
181 select HAVE_KPROBES_ON_FTRACE
182 select HAVE_KRETPROBES
184 select HAVE_LIVEPATCH
185 select HAVE_MEMBLOCK_PHYS_MAP
186 select HAVE_MOD_ARCH_SPECIFIC
188 select HAVE_NOP_MCOUNT
190 select HAVE_PERF_EVENTS
191 select HAVE_PERF_REGS
192 select HAVE_PERF_USER_STACK_DUMP
193 select HAVE_REGS_AND_STACK_ACCESS_API
194 select HAVE_RELIABLE_STACKTRACE
196 select HAVE_SAMPLE_FTRACE_DIRECT
197 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
198 select HAVE_SOFTIRQ_ON_OWN_STACK
199 select HAVE_SYSCALL_TRACEPOINTS
200 select HAVE_VIRT_CPU_ACCOUNTING
201 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
202 select IOMMU_HELPER if PCI
203 select IOMMU_SUPPORT if PCI
204 select MMU_GATHER_NO_GATHER
205 select MMU_GATHER_RCU_TABLE_FREE
206 select MODULES_USE_ELF_RELA
207 select NEED_DMA_MAP_STATE if PCI
208 select NEED_SG_DMA_LENGTH if PCI
210 select OLD_SIGSUSPEND3
211 select PCI_DOMAINS if PCI
212 select PCI_MSI if PCI
213 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
216 select SYSCTL_EXCEPTION_TRACE
217 select THREAD_INFO_IN_TASK
218 select TRACE_IRQFLAGS_SUPPORT
220 select VIRT_CPU_ACCOUNTING
222 # Note: keep the above list sorted alphabetically
224 config SCHED_OMIT_FRAME_POINTER
227 config PGTABLE_LEVELS
231 source "kernel/livepatch/Kconfig"
233 menu "Processor type and features"
235 config HAVE_MARCH_Z10_FEATURES
238 config HAVE_MARCH_Z196_FEATURES
240 select HAVE_MARCH_Z10_FEATURES
242 config HAVE_MARCH_ZEC12_FEATURES
244 select HAVE_MARCH_Z196_FEATURES
246 config HAVE_MARCH_Z13_FEATURES
248 select HAVE_MARCH_ZEC12_FEATURES
250 config HAVE_MARCH_Z14_FEATURES
252 select HAVE_MARCH_Z13_FEATURES
254 config HAVE_MARCH_Z15_FEATURES
256 select HAVE_MARCH_Z14_FEATURES
258 config HAVE_MARCH_Z16_FEATURES
260 select HAVE_MARCH_Z15_FEATURES
263 prompt "Processor type"
267 bool "IBM System z10"
268 select HAVE_MARCH_Z10_FEATURES
269 depends on $(cc-option,-march=z10)
271 Select this to enable optimizations for IBM System z10 (2097 and 2098
272 series). This is the oldest machine generation currently supported.
275 bool "IBM zEnterprise 114 and 196"
276 select HAVE_MARCH_Z196_FEATURES
277 depends on $(cc-option,-march=z196)
279 Select this to enable optimizations for IBM zEnterprise 114 and 196
280 (2818 and 2817 series). The kernel will be slightly faster but will
281 not work on older machines.
284 bool "IBM zBC12 and zEC12"
285 select HAVE_MARCH_ZEC12_FEATURES
286 depends on $(cc-option,-march=zEC12)
288 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
289 2827 series). The kernel will be slightly faster but will not work on
293 bool "IBM z13s and z13"
294 select HAVE_MARCH_Z13_FEATURES
295 depends on $(cc-option,-march=z13)
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
304 depends on $(cc-option,-march=z14)
306 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
307 and 3906 series). The kernel will be slightly faster but will not
308 work on older machines.
312 select HAVE_MARCH_Z15_FEATURES
313 depends on $(cc-option,-march=z15)
315 Select this to enable optimizations for IBM z15 (8562
316 and 8561 series). The kernel will be slightly faster but will not
317 work on older machines.
321 select HAVE_MARCH_Z16_FEATURES
322 depends on $(cc-option,-march=z16)
324 Select this to enable optimizations for IBM z16 (3931 and
329 config MARCH_Z10_TUNE
330 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
332 config MARCH_Z196_TUNE
333 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
335 config MARCH_ZEC12_TUNE
336 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
338 config MARCH_Z13_TUNE
339 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
341 config MARCH_Z14_TUNE
342 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
344 config MARCH_Z15_TUNE
345 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
347 config MARCH_Z16_TUNE
348 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
351 prompt "Tune code generation"
354 Cause the compiler to tune (-mtune) the generated code for a machine.
355 This will make the code run faster on the selected machine but
356 somewhat slower on other machines.
357 This option only changes how the compiler emits instructions, not the
358 selection of instructions itself, so the resulting kernel will run on
364 Tune the generated code for the target processor for which the kernel
368 bool "IBM System z10"
371 bool "IBM zEnterprise 114 and 196"
372 depends on $(cc-option,-mtune=z196)
375 bool "IBM zBC12 and zEC12"
376 depends on $(cc-option,-mtune=zEC12)
379 bool "IBM z13s and z13"
380 depends on $(cc-option,-mtune=z13)
383 bool "IBM z14 ZR1 and z14"
384 depends on $(cc-option,-mtune=z14)
388 depends on $(cc-option,-mtune=z15)
392 depends on $(cc-option,-mtune=z16)
399 config COMMAND_LINE_SIZE
400 int "Maximum size of kernel command line"
404 This allows you to specify the maximum length of the kernel command
409 prompt "Kernel support for 31 bit emulation"
410 select ARCH_WANT_OLD_COMPAT_IPC
411 select COMPAT_OLD_SIGACTION
414 depends on !CC_IS_CLANG
416 Select this option if you want to enable your system kernel to
417 handle system-calls from ELF binaries for 31 bit ESA. This option
418 (and some other stuff like libraries and such) is needed for
419 executing 31 bit applications. It is safe to say "Y".
421 config SYSVIPC_COMPAT
422 def_bool y if COMPAT && SYSVIPC
428 int "Maximum number of CPUs (2-512)"
432 This allows you to specify the maximum number of CPUs which this
433 kernel will support. The maximum supported value is 512 and the
434 minimum value which makes sense is 2.
436 This is purely to save memory - each supported CPU adds
437 approximately sixteen kilobytes to the kernel image.
444 depends on SCHED_TOPOLOGY
449 This option adds NUMA support to the kernel.
468 config SCHED_TOPOLOGY
470 prompt "Topology scheduler support"
476 Topology scheduler support improves the CPU scheduler's decision
477 making when dealing with machines that have multi-threading,
478 multiple cores or multiple books.
480 source "kernel/Kconfig.hz"
487 bool "kexec file based system call"
491 depends on CRYPTO_SHA256
492 depends on CRYPTO_SHA256_S390
494 Enable the kexec file based system call. In contrast to the normal
495 kexec system call this system call takes file descriptors for the
496 kernel and initramfs as arguments.
498 config ARCH_HAS_KEXEC_PURGATORY
500 depends on KEXEC_FILE
503 bool "Verify kernel signature during kexec_file_load() syscall"
504 depends on KEXEC_FILE && MODULE_SIG_FORMAT
506 This option makes kernel signature verification mandatory for
507 the kexec_file_load() syscall.
509 In addition to that option, you need to enable signature
510 verification for the corresponding kernel image type being
511 loaded in order for this to work.
515 prompt "s390 architectural random number generation API"
517 Enable the s390 architectural random number generation API
518 to provide random data for all consumers within the Linux
521 When enabled the arch_random_* functions declared in linux/random.h
522 are implemented. The implementation is based on the s390 CPACF
523 instruction subfunction TRNG which provides a real true random
530 prompt "Enable modified branch prediction for the kernel by default"
532 If this option is selected the kernel will switch to a modified
533 branch prediction mode if the firmware interface is available.
534 The modified branch prediction mode improves the behaviour in
535 regard to speculative execution.
537 With the option enabled the kernel parameter "nobp=0" or "nospec"
538 can be used to run the kernel in the normal branch prediction mode.
540 With the option disabled the modified branch prediction mode is
541 enabled with the "nobp=1" kernel parameter.
547 depends on $(cc-option,-mindirect-branch=thunk)
548 prompt "Avoid speculative indirect branches in the kernel"
550 Compile the kernel with the expoline compiler options to guard
551 against kernel-to-user data leaks by avoiding speculative indirect
553 Requires a compiler with -mindirect-branch=thunk support for full
554 protection. The kernel may run slower.
558 config EXPOLINE_EXTERN
561 depends on CC_IS_GCC && GCC_VERSION >= 110200
562 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
563 prompt "Generate expolines as extern functions."
565 This option is required for some tooling like kpatch. The kernel is
566 compiled with -mindirect-branch=thunk-extern and requires a newer
572 prompt "Expoline default"
574 default EXPOLINE_FULL
577 bool "spectre_v2=off"
580 bool "spectre_v2=auto"
588 bool "Build a relocatable kernel"
591 This builds a kernel image that retains relocation information
592 so it can be loaded at an arbitrary address.
593 The kernel is linked as a position-independent executable (PIE)
594 and contains dynamic relocations which are processed early in the
596 The relocations make the kernel image about 15% larger (compressed
597 10%), but are discarded at runtime.
599 config RANDOMIZE_BASE
600 bool "Randomize the address of the kernel image (KASLR)"
601 depends on RELOCATABLE
604 In support of Kernel Address Space Layout Randomization (KASLR),
605 this randomizes the address at which the kernel image is loaded,
606 as a security feature that deters exploit attempts relying on
607 knowledge of the location of kernel internals.
613 config ARCH_SPARSEMEM_ENABLE
615 select SPARSEMEM_VMEMMAP_ENABLE
616 select SPARSEMEM_VMEMMAP
618 config ARCH_SPARSEMEM_DEFAULT
621 config MAX_PHYSMEM_BITS
622 int "Maximum size of supported physical memory in bits (42-53)"
626 This option specifies the maximum supported size of physical memory
627 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
628 Increasing the number of bits also increases the kernel image size.
629 By default 46 bits (64TB) are supported.
633 depends on !VMAP_STACK
634 prompt "Detect kernel stack overflow"
636 This option enables the compiler option -mstack-guard and
637 -mstack-size if they are available. If the compiler supports them
638 it will emit additional code to each function prolog to trigger
639 an illegal operation if the kernel stack is about to overflow.
641 Say N if you are unsure.
644 int "Size of the guard area (128-1024)"
646 depends on CHECK_STACK
649 This allows you to specify the size of the guard area at the lower
650 end of the kernel stack. If the kernel stack points into the guard
651 area on function entry an illegal operation is triggered. The size
652 needs to be a power of 2. Please keep in mind that the size of an
653 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
654 The minimum size for the stack guard should be 256 for 31 bit and
663 prompt "QDIO support"
665 This driver provides the Queued Direct I/O base support for
668 To compile this driver as a module, choose M here: the
669 module will be called qdio.
675 config PCI_NR_FUNCTIONS
676 int "Maximum number of PCI functions (1-4096)"
680 This allows you to specify the maximum number of PCI functions which
681 this kernel will support.
690 prompt "Support for CHSC subchannels"
692 This driver allows usage of CHSC subchannels. A CHSC subchannel
693 is usually present on LPAR only.
694 The driver creates a device /dev/chsc, which may be used to
695 obtain I/O configuration information about the machine and
696 to issue asynchronous chsc commands (DANGEROUS).
697 You will usually only want to use this interface on a special
698 LPAR designated for system management.
700 To compile this driver as a module, choose M here: the
701 module will be called chsc_sch.
707 prompt "SCM bus driver"
709 Bus driver for Storage Class Memory.
713 prompt "Support for EADM subchannels"
716 This driver allows usage of EADM subchannels. EADM subchannels act
717 as a communication vehicle for SCM increments.
719 To compile this driver as a module, choose M here: the
720 module will be called eadm_sch.
724 prompt "Support for VFIO-CCW subchannels"
725 depends on S390_CCW_IOMMU && VFIO_MDEV
727 This driver allows usage of I/O subchannels via VFIO-CCW.
729 To compile this driver as a module, choose M here: the
730 module will be called vfio_ccw.
734 prompt "VFIO support for AP devices"
735 depends on S390_AP_IOMMU && VFIO_MDEV && KVM
738 This driver grants access to Adjunct Processor (AP) devices
739 via the VFIO mediated device interface.
741 To compile this driver as a module, choose M here: the module
742 will be called vfio_ap.
749 bool "kernel crash dumps"
752 Generate crash dump after being started by kexec.
753 Crash dump kernels are loaded in the main kernel with kexec-tools
754 into a specially reserved region and then later executed after
755 a crash by kdump/kexec.
756 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
757 This option also enables s390 zfcpdump.
758 See also <file:Documentation/s390/zfcpdump.rst>
767 default (SMC || CCWGROUP)
769 menu "Virtualization"
771 config PROTECTED_VIRTUALIZATION_GUEST
773 prompt "Protected virtualization guest support"
774 select ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
776 Select this option, if you want to be able to run this
777 kernel as a protected virtualization KVM guest.
778 Protected virtualization capable machines have a mini hypervisor
779 located at machine level (an ultravisor). With help of the
780 Ultravisor, KVM will be able to run "protected" VMs, special
781 VMs whose memory and management data are unavailable to KVM.
785 prompt "Pseudo page fault support"
787 Select this option, if you want to use PFAULT pseudo page fault
788 handling under VM. If running native or in LPAR, this option
789 has no effect. If your VM does not support PFAULT, PAGEEX
790 pseudo page fault handling will be used.
791 Note that VM 4.2 supports PFAULT but has a bug in its
792 implementation that causes some problems.
793 Everybody who wants to run Linux under VM != VM4.2 should select
798 prompt "Cooperative memory management"
800 Select this option, if you want to enable the kernel interface
801 to reduce the memory size of the system. This is accomplished
802 by allocating pages of memory and put them "on hold". This only
803 makes sense for a system running under VM where the unused pages
804 will be reused by VM for other guest systems. The interface
805 allows an external monitor to balance memory of many systems.
806 Everybody who wants to run Linux under VM should select this
811 prompt "IUCV special message interface to cooperative memory management"
812 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
814 Select this option to enable the special message interface to
815 the cooperative memory management.
819 prompt "Linux - VM Monitor Stream, base infrastructure"
820 depends on PROC_SYSCTL
822 This provides a kernel interface for creating and updating z/VM APPLDATA
823 monitor records. The monitor records are updated at certain time
824 intervals, once the timer is started.
825 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
826 i.e. enables or disables monitoring on the Linux side.
827 A custom interval value (in seconds) can be written to
828 /proc/appldata/interval.
830 Defaults are 60 seconds interval and timer off.
831 The /proc entries can also be read from, showing the current settings.
835 prompt "Monitor memory management statistics"
836 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
838 This provides memory management related data to the Linux - VM Monitor
839 Stream, like paging/swapping rate, memory utilisation, etc.
840 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
841 APPLDATA monitor record, i.e. enables or disables monitoring this record
845 The /proc entry can also be read from, showing the current settings.
847 This can also be compiled as a module, which will be called
852 prompt "Monitor OS statistics"
853 depends on APPLDATA_BASE
855 This provides OS related data to the Linux - VM Monitor Stream, like
856 CPU utilisation, etc.
857 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
858 APPLDATA monitor record, i.e. enables or disables monitoring this record
862 This can also be compiled as a module, which will be called
865 config APPLDATA_NET_SUM
867 prompt "Monitor overall network statistics"
868 depends on APPLDATA_BASE && NET
870 This provides network related data to the Linux - VM Monitor Stream,
871 currently there is only a total sum of network I/O statistics, no
873 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
874 APPLDATA monitor record, i.e. enables or disables monitoring this record
878 This can also be compiled as a module, which will be called
883 prompt "s390 hypervisor file system support"
884 select SYS_HYPERVISOR
886 This is a virtual file system intended to provide accounting
887 information in an s390 hypervisor environment.
889 source "arch/s390/kvm/Kconfig"
893 prompt "s390 support for virtio devices"
895 select VIRTUALIZATION
898 Enabling this option adds support for virtio based paravirtual device
901 Select this option if you want to run the kernel as a guest under
906 config S390_MODULES_SANITY_TEST_HELPERS
911 config S390_UNWIND_SELFTEST
914 default KUNIT_ALL_TESTS
915 prompt "Test unwind functions"
917 This option enables s390 specific stack unwinder testing kernel
918 module. This option is not useful for distributions or general
919 kernels, but only for kernel developers working on architecture code.
921 Say N if you are unsure.
923 config S390_KPROBES_SANITY_TEST
925 prompt "Enable s390 specific kprobes tests"
929 This option enables an s390 specific kprobes test module. This option
930 is not useful for distributions or general kernels, but only for kernel
931 developers working on architecture code.
933 Say N if you are unsure.
935 config S390_MODULES_SANITY_TEST
938 default KUNIT_ALL_TESTS
939 prompt "Enable s390 specific modules tests"
940 select S390_MODULES_SANITY_TEST_HELPERS
942 This option enables an s390 specific modules test. This option is
943 not useful for distributions or general kernels, but only for
944 kernel developers working on architecture code.
946 Say N if you are unsure.