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 GCC12_NO_ARRAY_BOUNDS
129 select GENERIC_ALLOCATOR
130 select GENERIC_CPU_AUTOPROBE
131 select GENERIC_CPU_VULNERABILITIES
133 select GENERIC_GETTIMEOFDAY
134 select GENERIC_PTDUMP
135 select GENERIC_SMP_IDLE_THREAD
136 select GENERIC_TIME_VSYSCALL
137 select GENERIC_VDSO_TIME_NS
138 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
139 select HAVE_ARCH_AUDITSYSCALL
140 select HAVE_ARCH_JUMP_LABEL
141 select HAVE_ARCH_JUMP_LABEL_RELATIVE
142 select HAVE_ARCH_KASAN
143 select HAVE_ARCH_KASAN_VMALLOC
144 select HAVE_ARCH_KCSAN
145 select HAVE_ARCH_KFENCE
146 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
147 select HAVE_ARCH_SECCOMP_FILTER
148 select HAVE_ARCH_SOFT_DIRTY
149 select HAVE_ARCH_TRACEHOOK
150 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
151 select HAVE_ARCH_VMAP_STACK
152 select HAVE_ASM_MODVERSIONS
153 select HAVE_CMPXCHG_DOUBLE
154 select HAVE_CMPXCHG_LOCAL
155 select HAVE_DEBUG_KMEMLEAK
156 select HAVE_DMA_CONTIGUOUS
157 select HAVE_DYNAMIC_FTRACE
158 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
159 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
160 select HAVE_DYNAMIC_FTRACE_WITH_REGS
161 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
162 select HAVE_EFFICIENT_UNALIGNED_ACCESS
165 select HAVE_FTRACE_MCOUNT_RECORD
166 select HAVE_FUNCTION_ARG_ACCESS_API
167 select HAVE_FUNCTION_ERROR_INJECTION
168 select HAVE_FUNCTION_GRAPH_TRACER
169 select HAVE_FUNCTION_TRACER
170 select HAVE_GCC_PLUGINS
171 select HAVE_GENERIC_VDSO
172 select HAVE_IOREMAP_PROT if PCI
173 select HAVE_KERNEL_BZIP2
174 select HAVE_KERNEL_GZIP
175 select HAVE_KERNEL_LZ4
176 select HAVE_KERNEL_LZMA
177 select HAVE_KERNEL_LZO
178 select HAVE_KERNEL_UNCOMPRESSED
179 select HAVE_KERNEL_XZ
180 select HAVE_KERNEL_ZSTD
182 select HAVE_KPROBES_ON_FTRACE
183 select HAVE_KRETPROBES
185 select HAVE_LIVEPATCH
186 select HAVE_MEMBLOCK_PHYS_MAP
187 select HAVE_MOD_ARCH_SPECIFIC
189 select HAVE_NOP_MCOUNT
191 select HAVE_PERF_EVENTS
192 select HAVE_PERF_REGS
193 select HAVE_PERF_USER_STACK_DUMP
194 select HAVE_REGS_AND_STACK_ACCESS_API
195 select HAVE_RELIABLE_STACKTRACE
197 select HAVE_SAMPLE_FTRACE_DIRECT
198 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
199 select HAVE_SOFTIRQ_ON_OWN_STACK
200 select HAVE_SYSCALL_TRACEPOINTS
201 select HAVE_VIRT_CPU_ACCOUNTING
202 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
203 select IOMMU_HELPER if PCI
204 select IOMMU_SUPPORT if PCI
205 select MMU_GATHER_NO_GATHER
206 select MMU_GATHER_RCU_TABLE_FREE
207 select MODULES_USE_ELF_RELA
208 select NEED_DMA_MAP_STATE if PCI
209 select NEED_SG_DMA_LENGTH if PCI
211 select OLD_SIGSUSPEND3
212 select PCI_DOMAINS if PCI
213 select PCI_MSI if PCI
214 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
217 select SYSCTL_EXCEPTION_TRACE
218 select THREAD_INFO_IN_TASK
219 select TRACE_IRQFLAGS_SUPPORT
221 select VIRT_CPU_ACCOUNTING
223 # Note: keep the above list sorted alphabetically
225 config SCHED_OMIT_FRAME_POINTER
228 config PGTABLE_LEVELS
232 source "kernel/livepatch/Kconfig"
234 menu "Processor type and features"
236 config HAVE_MARCH_Z10_FEATURES
239 config HAVE_MARCH_Z196_FEATURES
241 select HAVE_MARCH_Z10_FEATURES
243 config HAVE_MARCH_ZEC12_FEATURES
245 select HAVE_MARCH_Z196_FEATURES
247 config HAVE_MARCH_Z13_FEATURES
249 select HAVE_MARCH_ZEC12_FEATURES
251 config HAVE_MARCH_Z14_FEATURES
253 select HAVE_MARCH_Z13_FEATURES
255 config HAVE_MARCH_Z15_FEATURES
257 select HAVE_MARCH_Z14_FEATURES
259 config HAVE_MARCH_Z16_FEATURES
261 select HAVE_MARCH_Z15_FEATURES
264 prompt "Processor type"
268 bool "IBM System z10"
269 select HAVE_MARCH_Z10_FEATURES
270 depends on $(cc-option,-march=z10)
272 Select this to enable optimizations for IBM System z10 (2097 and 2098
273 series). This is the oldest machine generation currently supported.
276 bool "IBM zEnterprise 114 and 196"
277 select HAVE_MARCH_Z196_FEATURES
278 depends on $(cc-option,-march=z196)
280 Select this to enable optimizations for IBM zEnterprise 114 and 196
281 (2818 and 2817 series). The kernel will be slightly faster but will
282 not work on older machines.
285 bool "IBM zBC12 and zEC12"
286 select HAVE_MARCH_ZEC12_FEATURES
287 depends on $(cc-option,-march=zEC12)
289 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
290 2827 series). The kernel will be slightly faster but will not work on
294 bool "IBM z13s and z13"
295 select HAVE_MARCH_Z13_FEATURES
296 depends on $(cc-option,-march=z13)
298 Select this to enable optimizations for IBM z13s and z13 (2965 and
299 2964 series). The kernel will be slightly faster but will not work on
303 bool "IBM z14 ZR1 and z14"
304 select HAVE_MARCH_Z14_FEATURES
305 depends on $(cc-option,-march=z14)
307 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
308 and 3906 series). The kernel will be slightly faster but will not
309 work on older machines.
313 select HAVE_MARCH_Z15_FEATURES
314 depends on $(cc-option,-march=z15)
316 Select this to enable optimizations for IBM z15 (8562
317 and 8561 series). The kernel will be slightly faster but will not
318 work on older machines.
322 select HAVE_MARCH_Z16_FEATURES
323 depends on $(cc-option,-march=z16)
325 Select this to enable optimizations for IBM z16 (3931 and
330 config MARCH_Z10_TUNE
331 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
333 config MARCH_Z196_TUNE
334 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
336 config MARCH_ZEC12_TUNE
337 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
339 config MARCH_Z13_TUNE
340 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
342 config MARCH_Z14_TUNE
343 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
345 config MARCH_Z15_TUNE
346 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
348 config MARCH_Z16_TUNE
349 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
352 prompt "Tune code generation"
355 Cause the compiler to tune (-mtune) the generated code for a machine.
356 This will make the code run faster on the selected machine but
357 somewhat slower on other machines.
358 This option only changes how the compiler emits instructions, not the
359 selection of instructions itself, so the resulting kernel will run on
365 Tune the generated code for the target processor for which the kernel
369 bool "IBM System z10"
372 bool "IBM zEnterprise 114 and 196"
373 depends on $(cc-option,-mtune=z196)
376 bool "IBM zBC12 and zEC12"
377 depends on $(cc-option,-mtune=zEC12)
380 bool "IBM z13s and z13"
381 depends on $(cc-option,-mtune=z13)
384 bool "IBM z14 ZR1 and z14"
385 depends on $(cc-option,-mtune=z14)
389 depends on $(cc-option,-mtune=z15)
393 depends on $(cc-option,-mtune=z16)
400 config COMMAND_LINE_SIZE
401 int "Maximum size of kernel command line"
405 This allows you to specify the maximum length of the kernel command
410 prompt "Kernel support for 31 bit emulation"
411 select ARCH_WANT_OLD_COMPAT_IPC
412 select COMPAT_OLD_SIGACTION
415 depends on !CC_IS_CLANG
417 Select this option if you want to enable your system kernel to
418 handle system-calls from ELF binaries for 31 bit ESA. This option
419 (and some other stuff like libraries and such) is needed for
420 executing 31 bit applications. It is safe to say "Y".
426 int "Maximum number of CPUs (2-512)"
430 This allows you to specify the maximum number of CPUs which this
431 kernel will support. The maximum supported value is 512 and the
432 minimum value which makes sense is 2.
434 This is purely to save memory - each supported CPU adds
435 approximately sixteen kilobytes to the kernel image.
442 depends on SCHED_TOPOLOGY
447 This option adds NUMA support to the kernel.
466 config SCHED_TOPOLOGY
468 prompt "Topology scheduler support"
474 Topology scheduler support improves the CPU scheduler's decision
475 making when dealing with machines that have multi-threading,
476 multiple cores or multiple books.
478 source "kernel/Kconfig.hz"
485 bool "kexec file based system call"
488 depends on CRYPTO_SHA256
489 depends on CRYPTO_SHA256_S390
491 Enable the kexec file based system call. In contrast to the normal
492 kexec system call this system call takes file descriptors for the
493 kernel and initramfs as arguments.
495 config ARCH_HAS_KEXEC_PURGATORY
497 depends on KEXEC_FILE
500 bool "Verify kernel signature during kexec_file_load() syscall"
501 depends on KEXEC_FILE && MODULE_SIG_FORMAT
503 This option makes kernel signature verification mandatory for
504 the kexec_file_load() syscall.
506 In addition to that option, you need to enable signature
507 verification for the corresponding kernel image type being
508 loaded in order for this to work.
512 prompt "s390 architectural random number generation API"
514 Enable the s390 architectural random number generation API
515 to provide random data for all consumers within the Linux
518 When enabled the arch_random_* functions declared in linux/random.h
519 are implemented. The implementation is based on the s390 CPACF
520 instruction subfunction TRNG which provides a real true random
527 prompt "Enable modified branch prediction for the kernel by default"
529 If this option is selected the kernel will switch to a modified
530 branch prediction mode if the firmware interface is available.
531 The modified branch prediction mode improves the behaviour in
532 regard to speculative execution.
534 With the option enabled the kernel parameter "nobp=0" or "nospec"
535 can be used to run the kernel in the normal branch prediction mode.
537 With the option disabled the modified branch prediction mode is
538 enabled with the "nobp=1" kernel parameter.
544 depends on $(cc-option,-mindirect-branch=thunk)
545 prompt "Avoid speculative indirect branches in the kernel"
547 Compile the kernel with the expoline compiler options to guard
548 against kernel-to-user data leaks by avoiding speculative indirect
550 Requires a compiler with -mindirect-branch=thunk support for full
551 protection. The kernel may run slower.
555 config EXPOLINE_EXTERN
558 depends on CC_IS_GCC && GCC_VERSION >= 110200
559 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
560 prompt "Generate expolines as extern functions."
562 This option is required for some tooling like kpatch. The kernel is
563 compiled with -mindirect-branch=thunk-extern and requires a newer
569 prompt "Expoline default"
571 default EXPOLINE_FULL
574 bool "spectre_v2=off"
577 bool "spectre_v2=auto"
585 bool "Build a relocatable kernel"
588 This builds a kernel image that retains relocation information
589 so it can be loaded at an arbitrary address.
590 The kernel is linked as a position-independent executable (PIE)
591 and contains dynamic relocations which are processed early in the
593 The relocations make the kernel image about 15% larger (compressed
594 10%), but are discarded at runtime.
596 config RANDOMIZE_BASE
597 bool "Randomize the address of the kernel image (KASLR)"
598 depends on RELOCATABLE
601 In support of Kernel Address Space Layout Randomization (KASLR),
602 this randomizes the address at which the kernel image is loaded,
603 as a security feature that deters exploit attempts relying on
604 knowledge of the location of kernel internals.
610 config ARCH_SPARSEMEM_ENABLE
612 select SPARSEMEM_VMEMMAP_ENABLE
613 select SPARSEMEM_VMEMMAP
615 config ARCH_SPARSEMEM_DEFAULT
618 config MAX_PHYSMEM_BITS
619 int "Maximum size of supported physical memory in bits (42-53)"
623 This option specifies the maximum supported size of physical memory
624 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
625 Increasing the number of bits also increases the kernel image size.
626 By default 46 bits (64TB) are supported.
630 depends on !VMAP_STACK
631 prompt "Detect kernel stack overflow"
633 This option enables the compiler option -mstack-guard and
634 -mstack-size if they are available. If the compiler supports them
635 it will emit additional code to each function prolog to trigger
636 an illegal operation if the kernel stack is about to overflow.
638 Say N if you are unsure.
641 int "Size of the guard area (128-1024)"
643 depends on CHECK_STACK
646 This allows you to specify the size of the guard area at the lower
647 end of the kernel stack. If the kernel stack points into the guard
648 area on function entry an illegal operation is triggered. The size
649 needs to be a power of 2. Please keep in mind that the size of an
650 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
651 The minimum size for the stack guard should be 256 for 31 bit and
660 prompt "QDIO support"
662 This driver provides the Queued Direct I/O base support for
665 To compile this driver as a module, choose M here: the
666 module will be called qdio.
672 config PCI_NR_FUNCTIONS
673 int "Maximum number of PCI functions (1-4096)"
677 This allows you to specify the maximum number of PCI functions which
678 this kernel will support.
687 prompt "Support for CHSC subchannels"
689 This driver allows usage of CHSC subchannels. A CHSC subchannel
690 is usually present on LPAR only.
691 The driver creates a device /dev/chsc, which may be used to
692 obtain I/O configuration information about the machine and
693 to issue asynchronous chsc commands (DANGEROUS).
694 You will usually only want to use this interface on a special
695 LPAR designated for system management.
697 To compile this driver as a module, choose M here: the
698 module will be called chsc_sch.
704 prompt "SCM bus driver"
706 Bus driver for Storage Class Memory.
710 prompt "Support for EADM subchannels"
713 This driver allows usage of EADM subchannels. EADM subchannels act
714 as a communication vehicle for SCM increments.
716 To compile this driver as a module, choose M here: the
717 module will be called eadm_sch.
721 prompt "Support for VFIO-CCW subchannels"
722 depends on S390_CCW_IOMMU && VFIO_MDEV
724 This driver allows usage of I/O subchannels via VFIO-CCW.
726 To compile this driver as a module, choose M here: the
727 module will be called vfio_ccw.
731 prompt "VFIO support for AP devices"
732 depends on S390_AP_IOMMU && VFIO_MDEV && 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.