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
33 config GENERIC_LOCKBREAK
34 def_bool y if PREEMPTION
48 config ARCH_SUPPORTS_UPROBES
51 config KASAN_SHADOW_OFFSET
54 default 0x1C000000000000
59 # Note: keep this list sorted alphabetically
61 imply IMA_SECURE_AND_OR_TRUSTED_BOOT
62 select ALTERNATE_USER_ADDRESS_SPACE
63 select ARCH_32BIT_USTAT_F_TINODE
64 select ARCH_BINFMT_ELF_STATE
65 select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
66 select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
67 select ARCH_ENABLE_MEMORY_HOTREMOVE
68 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
69 select ARCH_HAS_CURRENT_STACK_POINTER
70 select ARCH_HAS_DEBUG_VM_PGTABLE
71 select ARCH_HAS_DEBUG_WX
72 select ARCH_HAS_DEVMEM_IS_ALLOWED
73 select ARCH_HAS_ELF_RANDOMIZE
74 select ARCH_HAS_FORCE_DMA_UNENCRYPTED
75 select ARCH_HAS_FORTIFY_SOURCE
76 select ARCH_HAS_GCOV_PROFILE_ALL
77 select ARCH_HAS_GIGANTIC_PAGE
79 select ARCH_HAS_MEM_ENCRYPT
80 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
81 select ARCH_HAS_PTE_SPECIAL
82 select ARCH_HAS_SCALED_CPUTIME
83 select ARCH_HAS_SET_MEMORY
84 select ARCH_HAS_STRICT_KERNEL_RWX
85 select ARCH_HAS_STRICT_MODULE_RWX
86 select ARCH_HAS_SYSCALL_WRAPPER
87 select ARCH_HAS_UBSAN_SANITIZE_ALL
88 select ARCH_HAS_VDSO_DATA
89 select ARCH_HAVE_NMI_SAFE_CMPXCHG
90 select ARCH_INLINE_READ_LOCK
91 select ARCH_INLINE_READ_LOCK_BH
92 select ARCH_INLINE_READ_LOCK_IRQ
93 select ARCH_INLINE_READ_LOCK_IRQSAVE
94 select ARCH_INLINE_READ_TRYLOCK
95 select ARCH_INLINE_READ_UNLOCK
96 select ARCH_INLINE_READ_UNLOCK_BH
97 select ARCH_INLINE_READ_UNLOCK_IRQ
98 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
99 select ARCH_INLINE_SPIN_LOCK
100 select ARCH_INLINE_SPIN_LOCK_BH
101 select ARCH_INLINE_SPIN_LOCK_IRQ
102 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
103 select ARCH_INLINE_SPIN_TRYLOCK
104 select ARCH_INLINE_SPIN_TRYLOCK_BH
105 select ARCH_INLINE_SPIN_UNLOCK
106 select ARCH_INLINE_SPIN_UNLOCK_BH
107 select ARCH_INLINE_SPIN_UNLOCK_IRQ
108 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
109 select ARCH_INLINE_WRITE_LOCK
110 select ARCH_INLINE_WRITE_LOCK_BH
111 select ARCH_INLINE_WRITE_LOCK_IRQ
112 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
113 select ARCH_INLINE_WRITE_TRYLOCK
114 select ARCH_INLINE_WRITE_UNLOCK
115 select ARCH_INLINE_WRITE_UNLOCK_BH
116 select ARCH_INLINE_WRITE_UNLOCK_IRQ
117 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
118 select ARCH_STACKWALK
119 select ARCH_SUPPORTS_ATOMIC_RMW
120 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
121 select ARCH_SUPPORTS_HUGETLBFS
122 select ARCH_SUPPORTS_NUMA_BALANCING
123 select ARCH_SUPPORTS_PER_VMA_LOCK
124 select ARCH_USE_BUILTIN_BSWAP
125 select ARCH_USE_CMPXCHG_LOCKREF
126 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
127 select ARCH_WANTS_NO_INSTR
128 select ARCH_WANT_DEFAULT_BPF_JIT
129 select ARCH_WANT_IPC_PARSE_VERSION
130 select ARCH_WANT_OPTIMIZE_VMEMMAP
131 select BUILDTIME_TABLE_SORT
132 select CLONE_BACKWARDS2
133 select DMA_OPS if PCI
134 select DYNAMIC_FTRACE if FUNCTION_TRACER
135 select GCC12_NO_ARRAY_BOUNDS
136 select GENERIC_ALLOCATOR
137 select GENERIC_CPU_AUTOPROBE
138 select GENERIC_CPU_VULNERABILITIES
140 select GENERIC_GETTIMEOFDAY
141 select GENERIC_PTDUMP
142 select GENERIC_SMP_IDLE_THREAD
143 select GENERIC_TIME_VSYSCALL
144 select GENERIC_VDSO_TIME_NS
145 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
146 select HAVE_ARCH_AUDITSYSCALL
147 select HAVE_ARCH_JUMP_LABEL
148 select HAVE_ARCH_JUMP_LABEL_RELATIVE
149 select HAVE_ARCH_KASAN
150 select HAVE_ARCH_KASAN_VMALLOC
151 select HAVE_ARCH_KCSAN
152 select HAVE_ARCH_KFENCE
153 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
154 select HAVE_ARCH_SECCOMP_FILTER
155 select HAVE_ARCH_SOFT_DIRTY
156 select HAVE_ARCH_TRACEHOOK
157 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
158 select HAVE_ARCH_VMAP_STACK
159 select HAVE_ASM_MODVERSIONS
160 select HAVE_CMPXCHG_DOUBLE
161 select HAVE_CMPXCHG_LOCAL
162 select HAVE_DEBUG_KMEMLEAK
163 select HAVE_DMA_CONTIGUOUS
164 select HAVE_DYNAMIC_FTRACE
165 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
166 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
167 select HAVE_DYNAMIC_FTRACE_WITH_REGS
168 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
169 select HAVE_EFFICIENT_UNALIGNED_ACCESS
172 select HAVE_FTRACE_MCOUNT_RECORD
173 select HAVE_FUNCTION_ARG_ACCESS_API
174 select HAVE_FUNCTION_ERROR_INJECTION
175 select HAVE_FUNCTION_GRAPH_TRACER
176 select HAVE_FUNCTION_TRACER
177 select HAVE_GCC_PLUGINS
178 select HAVE_GENERIC_VDSO
179 select HAVE_IOREMAP_PROT if PCI
180 select HAVE_KERNEL_BZIP2
181 select HAVE_KERNEL_GZIP
182 select HAVE_KERNEL_LZ4
183 select HAVE_KERNEL_LZMA
184 select HAVE_KERNEL_LZO
185 select HAVE_KERNEL_UNCOMPRESSED
186 select HAVE_KERNEL_XZ
187 select HAVE_KERNEL_ZSTD
189 select HAVE_KPROBES_ON_FTRACE
190 select HAVE_KRETPROBES
192 select HAVE_LIVEPATCH
193 select HAVE_MEMBLOCK_PHYS_MAP
194 select HAVE_MOD_ARCH_SPECIFIC
196 select HAVE_NOP_MCOUNT
198 select HAVE_PERF_EVENTS
199 select HAVE_PERF_REGS
200 select HAVE_PERF_USER_STACK_DUMP
201 select HAVE_REGS_AND_STACK_ACCESS_API
202 select HAVE_RELIABLE_STACKTRACE
205 select HAVE_SAMPLE_FTRACE_DIRECT
206 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
207 select HAVE_SETUP_PER_CPU_AREA
208 select HAVE_SOFTIRQ_ON_OWN_STACK
209 select HAVE_SYSCALL_TRACEPOINTS
210 select HAVE_VIRT_CPU_ACCOUNTING
211 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
212 select IOMMU_HELPER if PCI
213 select IOMMU_SUPPORT if PCI
214 select MMU_GATHER_MERGE_VMAS
215 select MMU_GATHER_NO_GATHER
216 select MMU_GATHER_RCU_TABLE_FREE
217 select MODULES_USE_ELF_RELA
218 select NEED_DMA_MAP_STATE if PCI
219 select NEED_PER_CPU_EMBED_FIRST_CHUNK
220 select NEED_SG_DMA_LENGTH if PCI
222 select OLD_SIGSUSPEND3
223 select PCI_DOMAINS if PCI
224 select PCI_MSI if PCI
225 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
228 select SYSCTL_EXCEPTION_TRACE
229 select THREAD_INFO_IN_TASK
230 select TRACE_IRQFLAGS_SUPPORT
232 select VIRT_CPU_ACCOUNTING
234 # Note: keep the above list sorted alphabetically
236 config SCHED_OMIT_FRAME_POINTER
239 config PGTABLE_LEVELS
243 source "kernel/livepatch/Kconfig"
245 menu "Processor type and features"
247 config HAVE_MARCH_Z10_FEATURES
250 config HAVE_MARCH_Z196_FEATURES
252 select HAVE_MARCH_Z10_FEATURES
254 config HAVE_MARCH_ZEC12_FEATURES
256 select HAVE_MARCH_Z196_FEATURES
258 config HAVE_MARCH_Z13_FEATURES
260 select HAVE_MARCH_ZEC12_FEATURES
262 config HAVE_MARCH_Z14_FEATURES
264 select HAVE_MARCH_Z13_FEATURES
266 config HAVE_MARCH_Z15_FEATURES
268 select HAVE_MARCH_Z14_FEATURES
270 config HAVE_MARCH_Z16_FEATURES
272 select HAVE_MARCH_Z15_FEATURES
275 prompt "Processor type"
279 bool "IBM System z10"
280 select HAVE_MARCH_Z10_FEATURES
281 depends on $(cc-option,-march=z10)
283 Select this to enable optimizations for IBM System z10 (2097 and 2098
284 series). This is the oldest machine generation currently supported.
287 bool "IBM zEnterprise 114 and 196"
288 select HAVE_MARCH_Z196_FEATURES
289 depends on $(cc-option,-march=z196)
291 Select this to enable optimizations for IBM zEnterprise 114 and 196
292 (2818 and 2817 series). The kernel will be slightly faster but will
293 not work on older machines.
296 bool "IBM zBC12 and zEC12"
297 select HAVE_MARCH_ZEC12_FEATURES
298 depends on $(cc-option,-march=zEC12)
300 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
301 2827 series). The kernel will be slightly faster but will not work on
305 bool "IBM z13s and z13"
306 select HAVE_MARCH_Z13_FEATURES
307 depends on $(cc-option,-march=z13)
309 Select this to enable optimizations for IBM z13s and z13 (2965 and
310 2964 series). The kernel will be slightly faster but will not work on
314 bool "IBM z14 ZR1 and z14"
315 select HAVE_MARCH_Z14_FEATURES
316 depends on $(cc-option,-march=z14)
318 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
319 and 3906 series). The kernel will be slightly faster but will not
320 work on older machines.
324 select HAVE_MARCH_Z15_FEATURES
325 depends on $(cc-option,-march=z15)
327 Select this to enable optimizations for IBM z15 (8562
328 and 8561 series). The kernel will be slightly faster but will not
329 work on older machines.
333 select HAVE_MARCH_Z16_FEATURES
334 depends on $(cc-option,-march=z16)
336 Select this to enable optimizations for IBM z16 (3931 and
341 config MARCH_Z10_TUNE
342 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
344 config MARCH_Z196_TUNE
345 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
347 config MARCH_ZEC12_TUNE
348 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
350 config MARCH_Z13_TUNE
351 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
353 config MARCH_Z14_TUNE
354 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
356 config MARCH_Z15_TUNE
357 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
359 config MARCH_Z16_TUNE
360 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
363 prompt "Tune code generation"
366 Cause the compiler to tune (-mtune) the generated code for a machine.
367 This will make the code run faster on the selected machine but
368 somewhat slower on other machines.
369 This option only changes how the compiler emits instructions, not the
370 selection of instructions itself, so the resulting kernel will run on
376 Tune the generated code for the target processor for which the kernel
380 bool "IBM System z10"
383 bool "IBM zEnterprise 114 and 196"
384 depends on $(cc-option,-mtune=z196)
387 bool "IBM zBC12 and zEC12"
388 depends on $(cc-option,-mtune=zEC12)
391 bool "IBM z13s and z13"
392 depends on $(cc-option,-mtune=z13)
395 bool "IBM z14 ZR1 and z14"
396 depends on $(cc-option,-mtune=z14)
400 depends on $(cc-option,-mtune=z15)
404 depends on $(cc-option,-mtune=z16)
411 config COMMAND_LINE_SIZE
412 int "Maximum size of kernel command line"
416 This allows you to specify the maximum length of the kernel command
421 prompt "Kernel support for 31 bit emulation"
422 select ARCH_WANT_OLD_COMPAT_IPC
423 select COMPAT_OLD_SIGACTION
426 depends on !CC_IS_CLANG
428 Select this option if you want to enable your system kernel to
429 handle system-calls from ELF binaries for 31 bit ESA. This option
430 (and some other stuff like libraries and such) is needed for
431 executing 31 bit applications. It is safe to say "Y".
437 int "Maximum number of CPUs (2-512)"
441 This allows you to specify the maximum number of CPUs which this
442 kernel will support. The maximum supported value is 512 and the
443 minimum value which makes sense is 2.
445 This is purely to save memory - each supported CPU adds
446 approximately sixteen kilobytes to the kernel image.
453 depends on SCHED_TOPOLOGY
458 This option adds NUMA support to the kernel.
477 config SCHED_TOPOLOGY
479 prompt "Topology scheduler support"
485 Topology scheduler support improves the CPU scheduler's decision
486 making when dealing with machines that have multi-threading,
487 multiple cores or multiple books.
489 source "kernel/Kconfig.hz"
496 bool "kexec file based system call"
499 depends on CRYPTO_SHA256
500 depends on CRYPTO_SHA256_S390
502 Enable the kexec file based system call. In contrast to the normal
503 kexec system call this system call takes file descriptors for the
504 kernel and initramfs as arguments.
506 config ARCH_HAS_KEXEC_PURGATORY
508 depends on KEXEC_FILE
511 bool "Verify kernel signature during kexec_file_load() syscall"
512 depends on KEXEC_FILE && MODULE_SIG_FORMAT
514 This option makes kernel signature verification mandatory for
515 the kexec_file_load() syscall.
517 In addition to that option, you need to enable signature
518 verification for the corresponding kernel image type being
519 loaded in order for this to work.
523 prompt "Enable modified branch prediction for the kernel by default"
525 If this option is selected the kernel will switch to a modified
526 branch prediction mode if the firmware interface is available.
527 The modified branch prediction mode improves the behaviour in
528 regard to speculative execution.
530 With the option enabled the kernel parameter "nobp=0" or "nospec"
531 can be used to run the kernel in the normal branch prediction mode.
533 With the option disabled the modified branch prediction mode is
534 enabled with the "nobp=1" kernel parameter.
540 depends on $(cc-option,-mindirect-branch=thunk)
541 prompt "Avoid speculative indirect branches in the kernel"
543 Compile the kernel with the expoline compiler options to guard
544 against kernel-to-user data leaks by avoiding speculative indirect
546 Requires a compiler with -mindirect-branch=thunk support for full
547 protection. The kernel may run slower.
551 config EXPOLINE_EXTERN
554 depends on CC_IS_GCC && GCC_VERSION >= 110200
555 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
556 prompt "Generate expolines as extern functions."
558 This option is required for some tooling like kpatch. The kernel is
559 compiled with -mindirect-branch=thunk-extern and requires a newer
565 prompt "Expoline default"
567 default EXPOLINE_FULL
570 bool "spectre_v2=off"
573 bool "spectre_v2=auto"
583 This builds a kernel image that retains relocation information
584 so it can be loaded at an arbitrary address.
585 The kernel is linked as a position-independent executable (PIE)
586 and contains dynamic relocations which are processed early in the
588 The relocations make the kernel image about 15% larger (compressed
589 10%), but are discarded at runtime.
590 Note: this option exists only for documentation purposes, please do
593 config RANDOMIZE_BASE
594 bool "Randomize the address of the kernel image (KASLR)"
597 In support of Kernel Address Space Layout Randomization (KASLR),
598 this randomizes the address at which the kernel image is loaded,
599 as a security feature that deters exploit attempts relying on
600 knowledge of the location of kernel internals.
606 config ARCH_SPARSEMEM_ENABLE
608 select SPARSEMEM_VMEMMAP_ENABLE
609 select SPARSEMEM_VMEMMAP
611 config ARCH_SPARSEMEM_DEFAULT
614 config MAX_PHYSMEM_BITS
615 int "Maximum size of supported physical memory in bits (42-53)"
619 This option specifies the maximum supported size of physical memory
620 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
621 Increasing the number of bits also increases the kernel image size.
622 By default 46 bits (64TB) are supported.
626 depends on !VMAP_STACK
627 prompt "Detect kernel stack overflow"
629 This option enables the compiler option -mstack-guard and
630 -mstack-size if they are available. If the compiler supports them
631 it will emit additional code to each function prolog to trigger
632 an illegal operation if the kernel stack is about to overflow.
634 Say N if you are unsure.
637 int "Size of the guard area (128-1024)"
639 depends on CHECK_STACK
642 This allows you to specify the size of the guard area at the lower
643 end of the kernel stack. If the kernel stack points into the guard
644 area on function entry an illegal operation is triggered. The size
645 needs to be a power of 2. Please keep in mind that the size of an
646 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
647 The minimum size for the stack guard should be 256 for 31 bit and
656 prompt "QDIO support"
658 This driver provides the Queued Direct I/O base support for
661 To compile this driver as a module, choose M here: the
662 module will be called qdio.
668 config PCI_NR_FUNCTIONS
669 int "Maximum number of PCI functions (1-4096)"
673 This allows you to specify the maximum number of PCI functions which
674 this kernel will support.
683 prompt "Support for CHSC subchannels"
685 This driver allows usage of CHSC subchannels. A CHSC subchannel
686 is usually present on LPAR only.
687 The driver creates a device /dev/chsc, which may be used to
688 obtain I/O configuration information about the machine and
689 to issue asynchronous chsc commands (DANGEROUS).
690 You will usually only want to use this interface on a special
691 LPAR designated for system management.
693 To compile this driver as a module, choose M here: the
694 module will be called chsc_sch.
700 prompt "SCM bus driver"
702 Bus driver for Storage Class Memory.
706 prompt "Support for EADM subchannels"
709 This driver allows usage of EADM subchannels. EADM subchannels act
710 as a communication vehicle for SCM increments.
712 To compile this driver as a module, choose M here: the
713 module will be called eadm_sch.
717 prompt "Support for VFIO-CCW subchannels"
718 depends on S390_CCW_IOMMU
722 This driver allows usage of I/O subchannels via VFIO-CCW.
724 To compile this driver as a module, choose M here: the
725 module will be called vfio_ccw.
729 prompt "VFIO support for AP devices"
730 depends on S390_AP_IOMMU && KVM
735 This driver grants access to Adjunct Processor (AP) devices
736 via the VFIO mediated device interface.
738 To compile this driver as a module, choose M here: the module
739 will be called vfio_ap.
746 bool "kernel crash dumps"
749 Generate crash dump after being started by kexec.
750 Crash dump kernels are loaded in the main kernel with kexec-tools
751 into a specially reserved region and then later executed after
752 a crash by kdump/kexec.
753 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
754 This option also enables s390 zfcpdump.
755 See also <file:Documentation/s390/zfcpdump.rst>
764 default (SMC || CCWGROUP)
766 menu "Virtualization"
768 config PROTECTED_VIRTUALIZATION_GUEST
770 prompt "Protected virtualization guest support"
772 Select this option, if you want to be able to run this
773 kernel as a protected virtualization KVM guest.
774 Protected virtualization capable machines have a mini hypervisor
775 located at machine level (an ultravisor). With help of the
776 Ultravisor, KVM will be able to run "protected" VMs, special
777 VMs whose memory and management data are unavailable to KVM.
781 prompt "Pseudo page fault support"
783 Select this option, if you want to use PFAULT pseudo page fault
784 handling under VM. If running native or in LPAR, this option
785 has no effect. If your VM does not support PFAULT, PAGEEX
786 pseudo page fault handling will be used.
787 Note that VM 4.2 supports PFAULT but has a bug in its
788 implementation that causes some problems.
789 Everybody who wants to run Linux under VM != VM4.2 should select
794 prompt "Cooperative memory management"
796 Select this option, if you want to enable the kernel interface
797 to reduce the memory size of the system. This is accomplished
798 by allocating pages of memory and put them "on hold". This only
799 makes sense for a system running under VM where the unused pages
800 will be reused by VM for other guest systems. The interface
801 allows an external monitor to balance memory of many systems.
802 Everybody who wants to run Linux under VM should select this
807 prompt "IUCV special message interface to cooperative memory management"
808 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
810 Select this option to enable the special message interface to
811 the cooperative memory management.
815 prompt "Linux - VM Monitor Stream, base infrastructure"
816 depends on PROC_SYSCTL
818 This provides a kernel interface for creating and updating z/VM APPLDATA
819 monitor records. The monitor records are updated at certain time
820 intervals, once the timer is started.
821 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
822 i.e. enables or disables monitoring on the Linux side.
823 A custom interval value (in seconds) can be written to
824 /proc/appldata/interval.
826 Defaults are 60 seconds interval and timer off.
827 The /proc entries can also be read from, showing the current settings.
831 prompt "Monitor memory management statistics"
832 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
834 This provides memory management related data to the Linux - VM Monitor
835 Stream, like paging/swapping rate, memory utilisation, etc.
836 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
837 APPLDATA monitor record, i.e. enables or disables monitoring this record
841 The /proc entry can also be read from, showing the current settings.
843 This can also be compiled as a module, which will be called
848 prompt "Monitor OS statistics"
849 depends on APPLDATA_BASE
851 This provides OS related data to the Linux - VM Monitor Stream, like
852 CPU utilisation, etc.
853 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
854 APPLDATA monitor record, i.e. enables or disables monitoring this record
858 This can also be compiled as a module, which will be called
861 config APPLDATA_NET_SUM
863 prompt "Monitor overall network statistics"
864 depends on APPLDATA_BASE && NET
866 This provides network related data to the Linux - VM Monitor Stream,
867 currently there is only a total sum of network I/O statistics, no
869 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
870 APPLDATA monitor record, i.e. enables or disables monitoring this record
874 This can also be compiled as a module, which will be called
879 prompt "s390 hypervisor file system support"
880 select SYS_HYPERVISOR
882 This is a virtual file system intended to provide accounting
883 information in an s390 hypervisor environment.
885 source "arch/s390/kvm/Kconfig"
889 prompt "s390 support for virtio devices"
891 select VIRTUALIZATION
894 Enabling this option adds support for virtio based paravirtual device
897 Select this option if you want to run the kernel as a guest under
902 config S390_MODULES_SANITY_TEST_HELPERS
907 config S390_UNWIND_SELFTEST
910 default KUNIT_ALL_TESTS
911 prompt "Test unwind functions"
913 This option enables s390 specific stack unwinder testing kernel
914 module. This option is not useful for distributions or general
915 kernels, but only for kernel developers working on architecture code.
917 Say N if you are unsure.
919 config S390_KPROBES_SANITY_TEST
921 prompt "Enable s390 specific kprobes tests"
925 This option enables an s390 specific kprobes test module. This option
926 is not useful for distributions or general kernels, but only for kernel
927 developers working on architecture code.
929 Say N if you are unsure.
931 config S390_MODULES_SANITY_TEST
934 default KUNIT_ALL_TESTS
935 prompt "Enable s390 specific modules tests"
936 select S390_MODULES_SANITY_TEST_HELPERS
938 This option enables an s390 specific modules test. This option is
939 not useful for distributions or general kernels, but only for
940 kernel developers working on architecture code.
942 Say N if you are unsure.