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_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
129 select ARCH_WANT_IPC_PARSE_VERSION
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
204 select HAVE_SAMPLE_FTRACE_DIRECT
205 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
206 select HAVE_SETUP_PER_CPU_AREA
207 select HAVE_SOFTIRQ_ON_OWN_STACK
208 select HAVE_SYSCALL_TRACEPOINTS
209 select HAVE_VIRT_CPU_ACCOUNTING
210 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
211 select IOMMU_HELPER if PCI
212 select IOMMU_SUPPORT if PCI
213 select MMU_GATHER_MERGE_VMAS
214 select MMU_GATHER_NO_GATHER
215 select MMU_GATHER_RCU_TABLE_FREE
216 select MODULES_USE_ELF_RELA
217 select NEED_DMA_MAP_STATE if PCI
218 select NEED_PER_CPU_EMBED_FIRST_CHUNK
219 select NEED_SG_DMA_LENGTH if PCI
221 select OLD_SIGSUSPEND3
222 select PCI_DOMAINS if PCI
223 select PCI_MSI if PCI
224 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
227 select SYSCTL_EXCEPTION_TRACE
228 select THREAD_INFO_IN_TASK
229 select TRACE_IRQFLAGS_SUPPORT
231 select VIRT_CPU_ACCOUNTING
233 # Note: keep the above list sorted alphabetically
235 config SCHED_OMIT_FRAME_POINTER
238 config PGTABLE_LEVELS
242 source "kernel/livepatch/Kconfig"
244 menu "Processor type and features"
246 config HAVE_MARCH_Z10_FEATURES
249 config HAVE_MARCH_Z196_FEATURES
251 select HAVE_MARCH_Z10_FEATURES
253 config HAVE_MARCH_ZEC12_FEATURES
255 select HAVE_MARCH_Z196_FEATURES
257 config HAVE_MARCH_Z13_FEATURES
259 select HAVE_MARCH_ZEC12_FEATURES
261 config HAVE_MARCH_Z14_FEATURES
263 select HAVE_MARCH_Z13_FEATURES
265 config HAVE_MARCH_Z15_FEATURES
267 select HAVE_MARCH_Z14_FEATURES
269 config HAVE_MARCH_Z16_FEATURES
271 select HAVE_MARCH_Z15_FEATURES
274 prompt "Processor type"
278 bool "IBM System z10"
279 select HAVE_MARCH_Z10_FEATURES
280 depends on $(cc-option,-march=z10)
282 Select this to enable optimizations for IBM System z10 (2097 and 2098
283 series). This is the oldest machine generation currently supported.
286 bool "IBM zEnterprise 114 and 196"
287 select HAVE_MARCH_Z196_FEATURES
288 depends on $(cc-option,-march=z196)
290 Select this to enable optimizations for IBM zEnterprise 114 and 196
291 (2818 and 2817 series). The kernel will be slightly faster but will
292 not work on older machines.
295 bool "IBM zBC12 and zEC12"
296 select HAVE_MARCH_ZEC12_FEATURES
297 depends on $(cc-option,-march=zEC12)
299 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
300 2827 series). The kernel will be slightly faster but will not work on
304 bool "IBM z13s and z13"
305 select HAVE_MARCH_Z13_FEATURES
306 depends on $(cc-option,-march=z13)
308 Select this to enable optimizations for IBM z13s and z13 (2965 and
309 2964 series). The kernel will be slightly faster but will not work on
313 bool "IBM z14 ZR1 and z14"
314 select HAVE_MARCH_Z14_FEATURES
315 depends on $(cc-option,-march=z14)
317 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
318 and 3906 series). The kernel will be slightly faster but will not
319 work on older machines.
323 select HAVE_MARCH_Z15_FEATURES
324 depends on $(cc-option,-march=z15)
326 Select this to enable optimizations for IBM z15 (8562
327 and 8561 series). The kernel will be slightly faster but will not
328 work on older machines.
332 select HAVE_MARCH_Z16_FEATURES
333 depends on $(cc-option,-march=z16)
335 Select this to enable optimizations for IBM z16 (3931 and
340 config MARCH_Z10_TUNE
341 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
343 config MARCH_Z196_TUNE
344 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
346 config MARCH_ZEC12_TUNE
347 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
349 config MARCH_Z13_TUNE
350 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
352 config MARCH_Z14_TUNE
353 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
355 config MARCH_Z15_TUNE
356 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
358 config MARCH_Z16_TUNE
359 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
362 prompt "Tune code generation"
365 Cause the compiler to tune (-mtune) the generated code for a machine.
366 This will make the code run faster on the selected machine but
367 somewhat slower on other machines.
368 This option only changes how the compiler emits instructions, not the
369 selection of instructions itself, so the resulting kernel will run on
375 Tune the generated code for the target processor for which the kernel
379 bool "IBM System z10"
382 bool "IBM zEnterprise 114 and 196"
383 depends on $(cc-option,-mtune=z196)
386 bool "IBM zBC12 and zEC12"
387 depends on $(cc-option,-mtune=zEC12)
390 bool "IBM z13s and z13"
391 depends on $(cc-option,-mtune=z13)
394 bool "IBM z14 ZR1 and z14"
395 depends on $(cc-option,-mtune=z14)
399 depends on $(cc-option,-mtune=z15)
403 depends on $(cc-option,-mtune=z16)
410 config COMMAND_LINE_SIZE
411 int "Maximum size of kernel command line"
415 This allows you to specify the maximum length of the kernel command
420 prompt "Kernel support for 31 bit emulation"
421 select ARCH_WANT_OLD_COMPAT_IPC
422 select COMPAT_OLD_SIGACTION
425 depends on !CC_IS_CLANG
427 Select this option if you want to enable your system kernel to
428 handle system-calls from ELF binaries for 31 bit ESA. This option
429 (and some other stuff like libraries and such) is needed for
430 executing 31 bit applications. It is safe to say "Y".
436 int "Maximum number of CPUs (2-512)"
440 This allows you to specify the maximum number of CPUs which this
441 kernel will support. The maximum supported value is 512 and the
442 minimum value which makes sense is 2.
444 This is purely to save memory - each supported CPU adds
445 approximately sixteen kilobytes to the kernel image.
452 depends on SCHED_TOPOLOGY
457 This option adds NUMA support to the kernel.
476 config SCHED_TOPOLOGY
478 prompt "Topology scheduler support"
484 Topology scheduler support improves the CPU scheduler's decision
485 making when dealing with machines that have multi-threading,
486 multiple cores or multiple books.
488 source "kernel/Kconfig.hz"
495 bool "kexec file based system call"
498 depends on CRYPTO_SHA256
499 depends on CRYPTO_SHA256_S390
501 Enable the kexec file based system call. In contrast to the normal
502 kexec system call this system call takes file descriptors for the
503 kernel and initramfs as arguments.
505 config ARCH_HAS_KEXEC_PURGATORY
507 depends on KEXEC_FILE
510 bool "Verify kernel signature during kexec_file_load() syscall"
511 depends on KEXEC_FILE && MODULE_SIG_FORMAT
513 This option makes kernel signature verification mandatory for
514 the kexec_file_load() syscall.
516 In addition to that option, you need to enable signature
517 verification for the corresponding kernel image type being
518 loaded in order for this to work.
522 prompt "Enable modified branch prediction for the kernel by default"
524 If this option is selected the kernel will switch to a modified
525 branch prediction mode if the firmware interface is available.
526 The modified branch prediction mode improves the behaviour in
527 regard to speculative execution.
529 With the option enabled the kernel parameter "nobp=0" or "nospec"
530 can be used to run the kernel in the normal branch prediction mode.
532 With the option disabled the modified branch prediction mode is
533 enabled with the "nobp=1" kernel parameter.
539 depends on $(cc-option,-mindirect-branch=thunk)
540 prompt "Avoid speculative indirect branches in the kernel"
542 Compile the kernel with the expoline compiler options to guard
543 against kernel-to-user data leaks by avoiding speculative indirect
545 Requires a compiler with -mindirect-branch=thunk support for full
546 protection. The kernel may run slower.
550 config EXPOLINE_EXTERN
553 depends on CC_IS_GCC && GCC_VERSION >= 110200
554 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
555 prompt "Generate expolines as extern functions."
557 This option is required for some tooling like kpatch. The kernel is
558 compiled with -mindirect-branch=thunk-extern and requires a newer
564 prompt "Expoline default"
566 default EXPOLINE_FULL
569 bool "spectre_v2=off"
572 bool "spectre_v2=auto"
582 This builds a kernel image that retains relocation information
583 so it can be loaded at an arbitrary address.
584 The kernel is linked as a position-independent executable (PIE)
585 and contains dynamic relocations which are processed early in the
587 The relocations make the kernel image about 15% larger (compressed
588 10%), but are discarded at runtime.
589 Note: this option exists only for documentation purposes, please do
592 config RANDOMIZE_BASE
593 bool "Randomize the address of the kernel image (KASLR)"
596 In support of Kernel Address Space Layout Randomization (KASLR),
597 this randomizes the address at which the kernel image is loaded,
598 as a security feature that deters exploit attempts relying on
599 knowledge of the location of kernel internals.
605 config ARCH_SPARSEMEM_ENABLE
607 select SPARSEMEM_VMEMMAP_ENABLE
608 select SPARSEMEM_VMEMMAP
610 config ARCH_SPARSEMEM_DEFAULT
613 config MAX_PHYSMEM_BITS
614 int "Maximum size of supported physical memory in bits (42-53)"
618 This option specifies the maximum supported size of physical memory
619 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
620 Increasing the number of bits also increases the kernel image size.
621 By default 46 bits (64TB) are supported.
625 depends on !VMAP_STACK
626 prompt "Detect kernel stack overflow"
628 This option enables the compiler option -mstack-guard and
629 -mstack-size if they are available. If the compiler supports them
630 it will emit additional code to each function prolog to trigger
631 an illegal operation if the kernel stack is about to overflow.
633 Say N if you are unsure.
636 int "Size of the guard area (128-1024)"
638 depends on CHECK_STACK
641 This allows you to specify the size of the guard area at the lower
642 end of the kernel stack. If the kernel stack points into the guard
643 area on function entry an illegal operation is triggered. The size
644 needs to be a power of 2. Please keep in mind that the size of an
645 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
646 The minimum size for the stack guard should be 256 for 31 bit and
655 prompt "QDIO support"
657 This driver provides the Queued Direct I/O base support for
660 To compile this driver as a module, choose M here: the
661 module will be called qdio.
667 config PCI_NR_FUNCTIONS
668 int "Maximum number of PCI functions (1-4096)"
672 This allows you to specify the maximum number of PCI functions which
673 this kernel will support.
682 prompt "Support for CHSC subchannels"
684 This driver allows usage of CHSC subchannels. A CHSC subchannel
685 is usually present on LPAR only.
686 The driver creates a device /dev/chsc, which may be used to
687 obtain I/O configuration information about the machine and
688 to issue asynchronous chsc commands (DANGEROUS).
689 You will usually only want to use this interface on a special
690 LPAR designated for system management.
692 To compile this driver as a module, choose M here: the
693 module will be called chsc_sch.
699 prompt "SCM bus driver"
701 Bus driver for Storage Class Memory.
705 prompt "Support for EADM subchannels"
708 This driver allows usage of EADM subchannels. EADM subchannels act
709 as a communication vehicle for SCM increments.
711 To compile this driver as a module, choose M here: the
712 module will be called eadm_sch.
716 prompt "Support for VFIO-CCW subchannels"
717 depends on S390_CCW_IOMMU
721 This driver allows usage of I/O subchannels via VFIO-CCW.
723 To compile this driver as a module, choose M here: the
724 module will be called vfio_ccw.
728 prompt "VFIO support for AP devices"
729 depends on S390_AP_IOMMU && KVM
734 This driver grants access to Adjunct Processor (AP) devices
735 via the VFIO mediated device interface.
737 To compile this driver as a module, choose M here: the module
738 will be called vfio_ap.
745 bool "kernel crash dumps"
748 Generate crash dump after being started by kexec.
749 Crash dump kernels are loaded in the main kernel with kexec-tools
750 into a specially reserved region and then later executed after
751 a crash by kdump/kexec.
752 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
753 This option also enables s390 zfcpdump.
754 See also <file:Documentation/s390/zfcpdump.rst>
763 default (SMC || CCWGROUP)
765 menu "Virtualization"
767 config PROTECTED_VIRTUALIZATION_GUEST
769 prompt "Protected virtualization guest support"
771 Select this option, if you want to be able to run this
772 kernel as a protected virtualization KVM guest.
773 Protected virtualization capable machines have a mini hypervisor
774 located at machine level (an ultravisor). With help of the
775 Ultravisor, KVM will be able to run "protected" VMs, special
776 VMs whose memory and management data are unavailable to KVM.
780 prompt "Pseudo page fault support"
782 Select this option, if you want to use PFAULT pseudo page fault
783 handling under VM. If running native or in LPAR, this option
784 has no effect. If your VM does not support PFAULT, PAGEEX
785 pseudo page fault handling will be used.
786 Note that VM 4.2 supports PFAULT but has a bug in its
787 implementation that causes some problems.
788 Everybody who wants to run Linux under VM != VM4.2 should select
793 prompt "Cooperative memory management"
795 Select this option, if you want to enable the kernel interface
796 to reduce the memory size of the system. This is accomplished
797 by allocating pages of memory and put them "on hold". This only
798 makes sense for a system running under VM where the unused pages
799 will be reused by VM for other guest systems. The interface
800 allows an external monitor to balance memory of many systems.
801 Everybody who wants to run Linux under VM should select this
806 prompt "IUCV special message interface to cooperative memory management"
807 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
809 Select this option to enable the special message interface to
810 the cooperative memory management.
814 prompt "Linux - VM Monitor Stream, base infrastructure"
815 depends on PROC_SYSCTL
817 This provides a kernel interface for creating and updating z/VM APPLDATA
818 monitor records. The monitor records are updated at certain time
819 intervals, once the timer is started.
820 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
821 i.e. enables or disables monitoring on the Linux side.
822 A custom interval value (in seconds) can be written to
823 /proc/appldata/interval.
825 Defaults are 60 seconds interval and timer off.
826 The /proc entries can also be read from, showing the current settings.
830 prompt "Monitor memory management statistics"
831 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
833 This provides memory management related data to the Linux - VM Monitor
834 Stream, like paging/swapping rate, memory utilisation, etc.
835 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
836 APPLDATA monitor record, i.e. enables or disables monitoring this record
840 The /proc entry can also be read from, showing the current settings.
842 This can also be compiled as a module, which will be called
847 prompt "Monitor OS statistics"
848 depends on APPLDATA_BASE
850 This provides OS related data to the Linux - VM Monitor Stream, like
851 CPU utilisation, etc.
852 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
853 APPLDATA monitor record, i.e. enables or disables monitoring this record
857 This can also be compiled as a module, which will be called
860 config APPLDATA_NET_SUM
862 prompt "Monitor overall network statistics"
863 depends on APPLDATA_BASE && NET
865 This provides network related data to the Linux - VM Monitor Stream,
866 currently there is only a total sum of network I/O statistics, no
868 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
869 APPLDATA monitor record, i.e. enables or disables monitoring this record
873 This can also be compiled as a module, which will be called
878 prompt "s390 hypervisor file system support"
879 select SYS_HYPERVISOR
881 This is a virtual file system intended to provide accounting
882 information in an s390 hypervisor environment.
884 source "arch/s390/kvm/Kconfig"
888 prompt "s390 support for virtio devices"
890 select VIRTUALIZATION
893 Enabling this option adds support for virtio based paravirtual device
896 Select this option if you want to run the kernel as a guest under
901 config S390_MODULES_SANITY_TEST_HELPERS
906 config S390_UNWIND_SELFTEST
909 default KUNIT_ALL_TESTS
910 prompt "Test unwind functions"
912 This option enables s390 specific stack unwinder testing kernel
913 module. This option is not useful for distributions or general
914 kernels, but only for kernel developers working on architecture code.
916 Say N if you are unsure.
918 config S390_KPROBES_SANITY_TEST
920 prompt "Enable s390 specific kprobes tests"
924 This option enables an s390 specific kprobes test module. This option
925 is not useful for distributions or general kernels, but only for kernel
926 developers working on architecture code.
928 Say N if you are unsure.
930 config S390_MODULES_SANITY_TEST
933 default KUNIT_ALL_TESTS
934 prompt "Enable s390 specific modules tests"
935 select S390_MODULES_SANITY_TEST_HELPERS
937 This option enables an s390 specific modules test. This option is
938 not useful for distributions or general kernels, but only for
939 kernel developers working on architecture code.
941 Say N if you are unsure.