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_USE_BUILTIN_BSWAP
124 select ARCH_USE_CMPXCHG_LOCKREF
125 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
126 select ARCH_WANTS_NO_INSTR
127 select ARCH_WANT_DEFAULT_BPF_JIT
128 select ARCH_WANT_IPC_PARSE_VERSION
129 select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
130 select BUILDTIME_TABLE_SORT
131 select CLONE_BACKWARDS2
132 select DMA_OPS if PCI
133 select DYNAMIC_FTRACE if FUNCTION_TRACER
134 select GCC12_NO_ARRAY_BOUNDS
135 select GENERIC_ALLOCATOR
136 select GENERIC_CPU_AUTOPROBE
137 select GENERIC_CPU_VULNERABILITIES
139 select GENERIC_GETTIMEOFDAY
140 select GENERIC_PTDUMP
141 select GENERIC_SMP_IDLE_THREAD
142 select GENERIC_TIME_VSYSCALL
143 select GENERIC_VDSO_TIME_NS
144 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
145 select HAVE_ARCH_AUDITSYSCALL
146 select HAVE_ARCH_JUMP_LABEL
147 select HAVE_ARCH_JUMP_LABEL_RELATIVE
148 select HAVE_ARCH_KASAN
149 select HAVE_ARCH_KASAN_VMALLOC
150 select HAVE_ARCH_KCSAN
151 select HAVE_ARCH_KFENCE
152 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
153 select HAVE_ARCH_SECCOMP_FILTER
154 select HAVE_ARCH_SOFT_DIRTY
155 select HAVE_ARCH_TRACEHOOK
156 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
157 select HAVE_ARCH_VMAP_STACK
158 select HAVE_ASM_MODVERSIONS
159 select HAVE_CMPXCHG_DOUBLE
160 select HAVE_CMPXCHG_LOCAL
161 select HAVE_DEBUG_KMEMLEAK
162 select HAVE_DMA_CONTIGUOUS
163 select HAVE_DYNAMIC_FTRACE
164 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
165 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
166 select HAVE_DYNAMIC_FTRACE_WITH_REGS
167 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
168 select HAVE_EFFICIENT_UNALIGNED_ACCESS
171 select HAVE_FTRACE_MCOUNT_RECORD
172 select HAVE_FUNCTION_ARG_ACCESS_API
173 select HAVE_FUNCTION_ERROR_INJECTION
174 select HAVE_FUNCTION_GRAPH_TRACER
175 select HAVE_FUNCTION_TRACER
176 select HAVE_GCC_PLUGINS
177 select HAVE_GENERIC_VDSO
178 select HAVE_IOREMAP_PROT if PCI
179 select HAVE_KERNEL_BZIP2
180 select HAVE_KERNEL_GZIP
181 select HAVE_KERNEL_LZ4
182 select HAVE_KERNEL_LZMA
183 select HAVE_KERNEL_LZO
184 select HAVE_KERNEL_UNCOMPRESSED
185 select HAVE_KERNEL_XZ
186 select HAVE_KERNEL_ZSTD
188 select HAVE_KPROBES_ON_FTRACE
189 select HAVE_KRETPROBES
191 select HAVE_LIVEPATCH
192 select HAVE_MEMBLOCK_PHYS_MAP
193 select HAVE_MOD_ARCH_SPECIFIC
195 select HAVE_NOP_MCOUNT
197 select HAVE_PERF_EVENTS
198 select HAVE_PERF_REGS
199 select HAVE_PERF_USER_STACK_DUMP
200 select HAVE_REGS_AND_STACK_ACCESS_API
201 select HAVE_RELIABLE_STACKTRACE
203 select HAVE_SAMPLE_FTRACE_DIRECT
204 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
205 select HAVE_SETUP_PER_CPU_AREA
206 select HAVE_SOFTIRQ_ON_OWN_STACK
207 select HAVE_SYSCALL_TRACEPOINTS
208 select HAVE_VIRT_CPU_ACCOUNTING
209 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
210 select IOMMU_HELPER if PCI
211 select IOMMU_SUPPORT if PCI
212 select MMU_GATHER_NO_GATHER
213 select MMU_GATHER_RCU_TABLE_FREE
214 select MMU_GATHER_MERGE_VMAS
215 select MODULES_USE_ELF_RELA
216 select NEED_DMA_MAP_STATE if PCI
217 select NEED_PER_CPU_EMBED_FIRST_CHUNK
218 select NEED_SG_DMA_LENGTH if PCI
220 select OLD_SIGSUSPEND3
221 select PCI_DOMAINS if PCI
222 select PCI_MSI if PCI
223 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
226 select SYSCTL_EXCEPTION_TRACE
227 select THREAD_INFO_IN_TASK
228 select TRACE_IRQFLAGS_SUPPORT
230 select VIRT_CPU_ACCOUNTING
232 # Note: keep the above list sorted alphabetically
234 config SCHED_OMIT_FRAME_POINTER
237 config PGTABLE_LEVELS
241 source "kernel/livepatch/Kconfig"
243 menu "Processor type and features"
245 config HAVE_MARCH_Z10_FEATURES
248 config HAVE_MARCH_Z196_FEATURES
250 select HAVE_MARCH_Z10_FEATURES
252 config HAVE_MARCH_ZEC12_FEATURES
254 select HAVE_MARCH_Z196_FEATURES
256 config HAVE_MARCH_Z13_FEATURES
258 select HAVE_MARCH_ZEC12_FEATURES
260 config HAVE_MARCH_Z14_FEATURES
262 select HAVE_MARCH_Z13_FEATURES
264 config HAVE_MARCH_Z15_FEATURES
266 select HAVE_MARCH_Z14_FEATURES
268 config HAVE_MARCH_Z16_FEATURES
270 select HAVE_MARCH_Z15_FEATURES
273 prompt "Processor type"
277 bool "IBM System z10"
278 select HAVE_MARCH_Z10_FEATURES
279 depends on $(cc-option,-march=z10)
281 Select this to enable optimizations for IBM System z10 (2097 and 2098
282 series). This is the oldest machine generation currently supported.
285 bool "IBM zEnterprise 114 and 196"
286 select HAVE_MARCH_Z196_FEATURES
287 depends on $(cc-option,-march=z196)
289 Select this to enable optimizations for IBM zEnterprise 114 and 196
290 (2818 and 2817 series). The kernel will be slightly faster but will
291 not work on older machines.
294 bool "IBM zBC12 and zEC12"
295 select HAVE_MARCH_ZEC12_FEATURES
296 depends on $(cc-option,-march=zEC12)
298 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
299 2827 series). The kernel will be slightly faster but will not work on
303 bool "IBM z13s and z13"
304 select HAVE_MARCH_Z13_FEATURES
305 depends on $(cc-option,-march=z13)
307 Select this to enable optimizations for IBM z13s and z13 (2965 and
308 2964 series). The kernel will be slightly faster but will not work on
312 bool "IBM z14 ZR1 and z14"
313 select HAVE_MARCH_Z14_FEATURES
314 depends on $(cc-option,-march=z14)
316 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
317 and 3906 series). The kernel will be slightly faster but will not
318 work on older machines.
322 select HAVE_MARCH_Z15_FEATURES
323 depends on $(cc-option,-march=z15)
325 Select this to enable optimizations for IBM z15 (8562
326 and 8561 series). The kernel will be slightly faster but will not
327 work on older machines.
331 select HAVE_MARCH_Z16_FEATURES
332 depends on $(cc-option,-march=z16)
334 Select this to enable optimizations for IBM z16 (3931 and
339 config MARCH_Z10_TUNE
340 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
342 config MARCH_Z196_TUNE
343 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
345 config MARCH_ZEC12_TUNE
346 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
348 config MARCH_Z13_TUNE
349 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
351 config MARCH_Z14_TUNE
352 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
354 config MARCH_Z15_TUNE
355 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
357 config MARCH_Z16_TUNE
358 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
361 prompt "Tune code generation"
364 Cause the compiler to tune (-mtune) the generated code for a machine.
365 This will make the code run faster on the selected machine but
366 somewhat slower on other machines.
367 This option only changes how the compiler emits instructions, not the
368 selection of instructions itself, so the resulting kernel will run on
374 Tune the generated code for the target processor for which the kernel
378 bool "IBM System z10"
381 bool "IBM zEnterprise 114 and 196"
382 depends on $(cc-option,-mtune=z196)
385 bool "IBM zBC12 and zEC12"
386 depends on $(cc-option,-mtune=zEC12)
389 bool "IBM z13s and z13"
390 depends on $(cc-option,-mtune=z13)
393 bool "IBM z14 ZR1 and z14"
394 depends on $(cc-option,-mtune=z14)
398 depends on $(cc-option,-mtune=z15)
402 depends on $(cc-option,-mtune=z16)
409 config COMMAND_LINE_SIZE
410 int "Maximum size of kernel command line"
414 This allows you to specify the maximum length of the kernel command
419 prompt "Kernel support for 31 bit emulation"
420 select ARCH_WANT_OLD_COMPAT_IPC
421 select COMPAT_OLD_SIGACTION
424 depends on !CC_IS_CLANG
426 Select this option if you want to enable your system kernel to
427 handle system-calls from ELF binaries for 31 bit ESA. This option
428 (and some other stuff like libraries and such) is needed for
429 executing 31 bit applications. It is safe to say "Y".
435 int "Maximum number of CPUs (2-512)"
439 This allows you to specify the maximum number of CPUs which this
440 kernel will support. The maximum supported value is 512 and the
441 minimum value which makes sense is 2.
443 This is purely to save memory - each supported CPU adds
444 approximately sixteen kilobytes to the kernel image.
451 depends on SCHED_TOPOLOGY
456 This option adds NUMA support to the kernel.
475 config SCHED_TOPOLOGY
477 prompt "Topology scheduler support"
483 Topology scheduler support improves the CPU scheduler's decision
484 making when dealing with machines that have multi-threading,
485 multiple cores or multiple books.
487 source "kernel/Kconfig.hz"
494 bool "kexec file based system call"
497 depends on CRYPTO_SHA256
498 depends on CRYPTO_SHA256_S390
500 Enable the kexec file based system call. In contrast to the normal
501 kexec system call this system call takes file descriptors for the
502 kernel and initramfs as arguments.
504 config ARCH_HAS_KEXEC_PURGATORY
506 depends on KEXEC_FILE
509 bool "Verify kernel signature during kexec_file_load() syscall"
510 depends on KEXEC_FILE && MODULE_SIG_FORMAT
512 This option makes kernel signature verification mandatory for
513 the kexec_file_load() syscall.
515 In addition to that option, you need to enable signature
516 verification for the corresponding kernel image type being
517 loaded in order for this to work.
521 prompt "Enable modified branch prediction for the kernel by default"
523 If this option is selected the kernel will switch to a modified
524 branch prediction mode if the firmware interface is available.
525 The modified branch prediction mode improves the behaviour in
526 regard to speculative execution.
528 With the option enabled the kernel parameter "nobp=0" or "nospec"
529 can be used to run the kernel in the normal branch prediction mode.
531 With the option disabled the modified branch prediction mode is
532 enabled with the "nobp=1" kernel parameter.
538 depends on $(cc-option,-mindirect-branch=thunk)
539 prompt "Avoid speculative indirect branches in the kernel"
541 Compile the kernel with the expoline compiler options to guard
542 against kernel-to-user data leaks by avoiding speculative indirect
544 Requires a compiler with -mindirect-branch=thunk support for full
545 protection. The kernel may run slower.
549 config EXPOLINE_EXTERN
552 depends on CC_IS_GCC && GCC_VERSION >= 110200
553 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
554 prompt "Generate expolines as extern functions."
556 This option is required for some tooling like kpatch. The kernel is
557 compiled with -mindirect-branch=thunk-extern and requires a newer
563 prompt "Expoline default"
565 default EXPOLINE_FULL
568 bool "spectre_v2=off"
571 bool "spectre_v2=auto"
581 This builds a kernel image that retains relocation information
582 so it can be loaded at an arbitrary address.
583 The kernel is linked as a position-independent executable (PIE)
584 and contains dynamic relocations which are processed early in the
586 The relocations make the kernel image about 15% larger (compressed
587 10%), but are discarded at runtime.
588 Note: this option exists only for documentation purposes, please do
591 config RANDOMIZE_BASE
592 bool "Randomize the address of the kernel image (KASLR)"
595 In support of Kernel Address Space Layout Randomization (KASLR),
596 this randomizes the address at which the kernel image is loaded,
597 as a security feature that deters exploit attempts relying on
598 knowledge of the location of kernel internals.
604 config ARCH_SPARSEMEM_ENABLE
606 select SPARSEMEM_VMEMMAP_ENABLE
607 select SPARSEMEM_VMEMMAP
609 config ARCH_SPARSEMEM_DEFAULT
612 config MAX_PHYSMEM_BITS
613 int "Maximum size of supported physical memory in bits (42-53)"
617 This option specifies the maximum supported size of physical memory
618 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
619 Increasing the number of bits also increases the kernel image size.
620 By default 46 bits (64TB) are supported.
624 depends on !VMAP_STACK
625 prompt "Detect kernel stack overflow"
627 This option enables the compiler option -mstack-guard and
628 -mstack-size if they are available. If the compiler supports them
629 it will emit additional code to each function prolog to trigger
630 an illegal operation if the kernel stack is about to overflow.
632 Say N if you are unsure.
635 int "Size of the guard area (128-1024)"
637 depends on CHECK_STACK
640 This allows you to specify the size of the guard area at the lower
641 end of the kernel stack. If the kernel stack points into the guard
642 area on function entry an illegal operation is triggered. The size
643 needs to be a power of 2. Please keep in mind that the size of an
644 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
645 The minimum size for the stack guard should be 256 for 31 bit and
654 prompt "QDIO support"
656 This driver provides the Queued Direct I/O base support for
659 To compile this driver as a module, choose M here: the
660 module will be called qdio.
666 config PCI_NR_FUNCTIONS
667 int "Maximum number of PCI functions (1-4096)"
671 This allows you to specify the maximum number of PCI functions which
672 this kernel will support.
681 prompt "Support for CHSC subchannels"
683 This driver allows usage of CHSC subchannels. A CHSC subchannel
684 is usually present on LPAR only.
685 The driver creates a device /dev/chsc, which may be used to
686 obtain I/O configuration information about the machine and
687 to issue asynchronous chsc commands (DANGEROUS).
688 You will usually only want to use this interface on a special
689 LPAR designated for system management.
691 To compile this driver as a module, choose M here: the
692 module will be called chsc_sch.
698 prompt "SCM bus driver"
700 Bus driver for Storage Class Memory.
704 prompt "Support for EADM subchannels"
707 This driver allows usage of EADM subchannels. EADM subchannels act
708 as a communication vehicle for SCM increments.
710 To compile this driver as a module, choose M here: the
711 module will be called eadm_sch.
715 prompt "Support for VFIO-CCW subchannels"
716 depends on S390_CCW_IOMMU && VFIO_MDEV
718 This driver allows usage of I/O subchannels via VFIO-CCW.
720 To compile this driver as a module, choose M here: the
721 module will be called vfio_ccw.
725 prompt "VFIO support for AP devices"
726 depends on S390_AP_IOMMU && VFIO_MDEV && KVM
729 This driver grants access to Adjunct Processor (AP) devices
730 via the VFIO mediated device interface.
732 To compile this driver as a module, choose M here: the module
733 will be called vfio_ap.
740 bool "kernel crash dumps"
743 Generate crash dump after being started by kexec.
744 Crash dump kernels are loaded in the main kernel with kexec-tools
745 into a specially reserved region and then later executed after
746 a crash by kdump/kexec.
747 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
748 This option also enables s390 zfcpdump.
749 See also <file:Documentation/s390/zfcpdump.rst>
758 default (SMC || CCWGROUP)
760 menu "Virtualization"
762 config PROTECTED_VIRTUALIZATION_GUEST
764 prompt "Protected virtualization guest support"
766 Select this option, if you want to be able to run this
767 kernel as a protected virtualization KVM guest.
768 Protected virtualization capable machines have a mini hypervisor
769 located at machine level (an ultravisor). With help of the
770 Ultravisor, KVM will be able to run "protected" VMs, special
771 VMs whose memory and management data are unavailable to KVM.
775 prompt "Pseudo page fault support"
777 Select this option, if you want to use PFAULT pseudo page fault
778 handling under VM. If running native or in LPAR, this option
779 has no effect. If your VM does not support PFAULT, PAGEEX
780 pseudo page fault handling will be used.
781 Note that VM 4.2 supports PFAULT but has a bug in its
782 implementation that causes some problems.
783 Everybody who wants to run Linux under VM != VM4.2 should select
788 prompt "Cooperative memory management"
790 Select this option, if you want to enable the kernel interface
791 to reduce the memory size of the system. This is accomplished
792 by allocating pages of memory and put them "on hold". This only
793 makes sense for a system running under VM where the unused pages
794 will be reused by VM for other guest systems. The interface
795 allows an external monitor to balance memory of many systems.
796 Everybody who wants to run Linux under VM should select this
801 prompt "IUCV special message interface to cooperative memory management"
802 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
804 Select this option to enable the special message interface to
805 the cooperative memory management.
809 prompt "Linux - VM Monitor Stream, base infrastructure"
810 depends on PROC_SYSCTL
812 This provides a kernel interface for creating and updating z/VM APPLDATA
813 monitor records. The monitor records are updated at certain time
814 intervals, once the timer is started.
815 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
816 i.e. enables or disables monitoring on the Linux side.
817 A custom interval value (in seconds) can be written to
818 /proc/appldata/interval.
820 Defaults are 60 seconds interval and timer off.
821 The /proc entries can also be read from, showing the current settings.
825 prompt "Monitor memory management statistics"
826 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
828 This provides memory management related data to the Linux - VM Monitor
829 Stream, like paging/swapping rate, memory utilisation, etc.
830 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
831 APPLDATA monitor record, i.e. enables or disables monitoring this record
835 The /proc entry can also be read from, showing the current settings.
837 This can also be compiled as a module, which will be called
842 prompt "Monitor OS statistics"
843 depends on APPLDATA_BASE
845 This provides OS related data to the Linux - VM Monitor Stream, like
846 CPU utilisation, etc.
847 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
848 APPLDATA monitor record, i.e. enables or disables monitoring this record
852 This can also be compiled as a module, which will be called
855 config APPLDATA_NET_SUM
857 prompt "Monitor overall network statistics"
858 depends on APPLDATA_BASE && NET
860 This provides network related data to the Linux - VM Monitor Stream,
861 currently there is only a total sum of network I/O statistics, no
863 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
864 APPLDATA monitor record, i.e. enables or disables monitoring this record
868 This can also be compiled as a module, which will be called
873 prompt "s390 hypervisor file system support"
874 select SYS_HYPERVISOR
876 This is a virtual file system intended to provide accounting
877 information in an s390 hypervisor environment.
879 source "arch/s390/kvm/Kconfig"
883 prompt "s390 support for virtio devices"
885 select VIRTUALIZATION
888 Enabling this option adds support for virtio based paravirtual device
891 Select this option if you want to run the kernel as a guest under
896 config S390_MODULES_SANITY_TEST_HELPERS
901 config S390_UNWIND_SELFTEST
904 default KUNIT_ALL_TESTS
905 prompt "Test unwind functions"
907 This option enables s390 specific stack unwinder testing kernel
908 module. This option is not useful for distributions or general
909 kernels, but only for kernel developers working on architecture code.
911 Say N if you are unsure.
913 config S390_KPROBES_SANITY_TEST
915 prompt "Enable s390 specific kprobes tests"
919 This option enables an s390 specific kprobes test module. This option
920 is not useful for distributions or general kernels, but only for kernel
921 developers working on architecture code.
923 Say N if you are unsure.
925 config S390_MODULES_SANITY_TEST
928 default KUNIT_ALL_TESTS
929 prompt "Enable s390 specific modules tests"
930 select S390_MODULES_SANITY_TEST_HELPERS
932 This option enables an s390 specific modules test. This option is
933 not useful for distributions or general kernels, but only for
934 kernel developers working on architecture code.
936 Say N if you are unsure.