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 FUNCTION_ALIGNMENT_8B if CC_IS_GCC
135 select FUNCTION_ALIGNMENT_16B if !CC_IS_GCC
136 select GCC12_NO_ARRAY_BOUNDS
137 select GENERIC_ALLOCATOR
138 select GENERIC_CPU_AUTOPROBE
139 select GENERIC_CPU_VULNERABILITIES
141 select GENERIC_GETTIMEOFDAY
142 select GENERIC_PTDUMP
143 select GENERIC_SMP_IDLE_THREAD
144 select GENERIC_TIME_VSYSCALL
145 select GENERIC_VDSO_TIME_NS
146 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
147 select HAVE_ARCH_AUDITSYSCALL
148 select HAVE_ARCH_JUMP_LABEL
149 select HAVE_ARCH_JUMP_LABEL_RELATIVE
150 select HAVE_ARCH_KASAN
151 select HAVE_ARCH_KASAN_VMALLOC
152 select HAVE_ARCH_KCSAN
153 select HAVE_ARCH_KFENCE
154 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
155 select HAVE_ARCH_SECCOMP_FILTER
156 select HAVE_ARCH_SOFT_DIRTY
157 select HAVE_ARCH_TRACEHOOK
158 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
159 select HAVE_ARCH_VMAP_STACK
160 select HAVE_ASM_MODVERSIONS
161 select HAVE_CMPXCHG_DOUBLE
162 select HAVE_CMPXCHG_LOCAL
163 select HAVE_DEBUG_KMEMLEAK
164 select HAVE_DMA_CONTIGUOUS
165 select HAVE_DYNAMIC_FTRACE
166 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
167 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
168 select HAVE_DYNAMIC_FTRACE_WITH_REGS
169 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
170 select HAVE_EFFICIENT_UNALIGNED_ACCESS
173 select HAVE_FTRACE_MCOUNT_RECORD
174 select HAVE_FUNCTION_ARG_ACCESS_API
175 select HAVE_FUNCTION_ERROR_INJECTION
176 select HAVE_FUNCTION_GRAPH_TRACER
177 select HAVE_FUNCTION_TRACER
178 select HAVE_GCC_PLUGINS
179 select HAVE_GENERIC_VDSO
180 select HAVE_IOREMAP_PROT if PCI
181 select HAVE_KERNEL_BZIP2
182 select HAVE_KERNEL_GZIP
183 select HAVE_KERNEL_LZ4
184 select HAVE_KERNEL_LZMA
185 select HAVE_KERNEL_LZO
186 select HAVE_KERNEL_UNCOMPRESSED
187 select HAVE_KERNEL_XZ
188 select HAVE_KERNEL_ZSTD
190 select HAVE_KPROBES_ON_FTRACE
191 select HAVE_KRETPROBES
193 select HAVE_LIVEPATCH
194 select HAVE_MEMBLOCK_PHYS_MAP
195 select HAVE_MOD_ARCH_SPECIFIC
197 select HAVE_NOP_MCOUNT
199 select HAVE_PERF_EVENTS
200 select HAVE_PERF_REGS
201 select HAVE_PERF_USER_STACK_DUMP
202 select HAVE_REGS_AND_STACK_ACCESS_API
203 select HAVE_RELIABLE_STACKTRACE
206 select HAVE_SAMPLE_FTRACE_DIRECT
207 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
208 select HAVE_SETUP_PER_CPU_AREA
209 select HAVE_SOFTIRQ_ON_OWN_STACK
210 select HAVE_SYSCALL_TRACEPOINTS
211 select HAVE_VIRT_CPU_ACCOUNTING
212 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
213 select IOMMU_HELPER if PCI
214 select IOMMU_SUPPORT if PCI
215 select MMU_GATHER_MERGE_VMAS
216 select MMU_GATHER_NO_GATHER
217 select MMU_GATHER_RCU_TABLE_FREE
218 select MODULES_USE_ELF_RELA
219 select NEED_DMA_MAP_STATE if PCI
220 select NEED_PER_CPU_EMBED_FIRST_CHUNK
221 select NEED_SG_DMA_LENGTH if PCI
223 select OLD_SIGSUSPEND3
224 select PCI_DOMAINS if PCI
225 select PCI_MSI if PCI
226 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
229 select SYSCTL_EXCEPTION_TRACE
230 select THREAD_INFO_IN_TASK
231 select TRACE_IRQFLAGS_SUPPORT
233 select VIRT_CPU_ACCOUNTING
235 # Note: keep the above list sorted alphabetically
237 config SCHED_OMIT_FRAME_POINTER
240 config PGTABLE_LEVELS
244 source "kernel/livepatch/Kconfig"
246 menu "Processor type and features"
248 config HAVE_MARCH_Z10_FEATURES
251 config HAVE_MARCH_Z196_FEATURES
253 select HAVE_MARCH_Z10_FEATURES
255 config HAVE_MARCH_ZEC12_FEATURES
257 select HAVE_MARCH_Z196_FEATURES
259 config HAVE_MARCH_Z13_FEATURES
261 select HAVE_MARCH_ZEC12_FEATURES
263 config HAVE_MARCH_Z14_FEATURES
265 select HAVE_MARCH_Z13_FEATURES
267 config HAVE_MARCH_Z15_FEATURES
269 select HAVE_MARCH_Z14_FEATURES
271 config HAVE_MARCH_Z16_FEATURES
273 select HAVE_MARCH_Z15_FEATURES
276 prompt "Processor type"
280 bool "IBM System z10"
281 select HAVE_MARCH_Z10_FEATURES
282 depends on $(cc-option,-march=z10)
284 Select this to enable optimizations for IBM System z10 (2097 and 2098
285 series). This is the oldest machine generation currently supported.
288 bool "IBM zEnterprise 114 and 196"
289 select HAVE_MARCH_Z196_FEATURES
290 depends on $(cc-option,-march=z196)
292 Select this to enable optimizations for IBM zEnterprise 114 and 196
293 (2818 and 2817 series). The kernel will be slightly faster but will
294 not work on older machines.
297 bool "IBM zBC12 and zEC12"
298 select HAVE_MARCH_ZEC12_FEATURES
299 depends on $(cc-option,-march=zEC12)
301 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
302 2827 series). The kernel will be slightly faster but will not work on
306 bool "IBM z13s and z13"
307 select HAVE_MARCH_Z13_FEATURES
308 depends on $(cc-option,-march=z13)
310 Select this to enable optimizations for IBM z13s and z13 (2965 and
311 2964 series). The kernel will be slightly faster but will not work on
315 bool "IBM z14 ZR1 and z14"
316 select HAVE_MARCH_Z14_FEATURES
317 depends on $(cc-option,-march=z14)
319 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
320 and 3906 series). The kernel will be slightly faster but will not
321 work on older machines.
325 select HAVE_MARCH_Z15_FEATURES
326 depends on $(cc-option,-march=z15)
328 Select this to enable optimizations for IBM z15 (8562
329 and 8561 series). The kernel will be slightly faster but will not
330 work on older machines.
334 select HAVE_MARCH_Z16_FEATURES
335 depends on $(cc-option,-march=z16)
337 Select this to enable optimizations for IBM z16 (3931 and
342 config MARCH_Z10_TUNE
343 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
345 config MARCH_Z196_TUNE
346 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
348 config MARCH_ZEC12_TUNE
349 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
351 config MARCH_Z13_TUNE
352 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
354 config MARCH_Z14_TUNE
355 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
357 config MARCH_Z15_TUNE
358 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
360 config MARCH_Z16_TUNE
361 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
364 prompt "Tune code generation"
367 Cause the compiler to tune (-mtune) the generated code for a machine.
368 This will make the code run faster on the selected machine but
369 somewhat slower on other machines.
370 This option only changes how the compiler emits instructions, not the
371 selection of instructions itself, so the resulting kernel will run on
377 Tune the generated code for the target processor for which the kernel
381 bool "IBM System z10"
384 bool "IBM zEnterprise 114 and 196"
385 depends on $(cc-option,-mtune=z196)
388 bool "IBM zBC12 and zEC12"
389 depends on $(cc-option,-mtune=zEC12)
392 bool "IBM z13s and z13"
393 depends on $(cc-option,-mtune=z13)
396 bool "IBM z14 ZR1 and z14"
397 depends on $(cc-option,-mtune=z14)
401 depends on $(cc-option,-mtune=z15)
405 depends on $(cc-option,-mtune=z16)
412 config COMMAND_LINE_SIZE
413 int "Maximum size of kernel command line"
417 This allows you to specify the maximum length of the kernel command
422 prompt "Kernel support for 31 bit emulation"
423 select ARCH_WANT_OLD_COMPAT_IPC
424 select COMPAT_OLD_SIGACTION
427 depends on !CC_IS_CLANG
429 Select this option if you want to enable your system kernel to
430 handle system-calls from ELF binaries for 31 bit ESA. This option
431 (and some other stuff like libraries and such) is needed for
432 executing 31 bit applications. It is safe to say "Y".
438 int "Maximum number of CPUs (2-512)"
442 This allows you to specify the maximum number of CPUs which this
443 kernel will support. The maximum supported value is 512 and the
444 minimum value which makes sense is 2.
446 This is purely to save memory - each supported CPU adds
447 approximately sixteen kilobytes to the kernel image.
454 depends on SCHED_TOPOLOGY
459 This option adds NUMA support to the kernel.
478 config SCHED_TOPOLOGY
480 prompt "Topology scheduler support"
486 Topology scheduler support improves the CPU scheduler's decision
487 making when dealing with machines that have multi-threading,
488 multiple cores or multiple books.
490 source "kernel/Kconfig.hz"
497 bool "kexec file based system call"
500 depends on CRYPTO_SHA256
501 depends on CRYPTO_SHA256_S390
503 Enable the kexec file based system call. In contrast to the normal
504 kexec system call this system call takes file descriptors for the
505 kernel and initramfs as arguments.
507 config ARCH_HAS_KEXEC_PURGATORY
509 depends on KEXEC_FILE
512 bool "Verify kernel signature during kexec_file_load() syscall"
513 depends on KEXEC_FILE && MODULE_SIG_FORMAT
515 This option makes kernel signature verification mandatory for
516 the kexec_file_load() syscall.
518 In addition to that option, you need to enable signature
519 verification for the corresponding kernel image type being
520 loaded in order for this to work.
524 prompt "Enable modified branch prediction for the kernel by default"
526 If this option is selected the kernel will switch to a modified
527 branch prediction mode if the firmware interface is available.
528 The modified branch prediction mode improves the behaviour in
529 regard to speculative execution.
531 With the option enabled the kernel parameter "nobp=0" or "nospec"
532 can be used to run the kernel in the normal branch prediction mode.
534 With the option disabled the modified branch prediction mode is
535 enabled with the "nobp=1" kernel parameter.
541 depends on $(cc-option,-mindirect-branch=thunk)
542 prompt "Avoid speculative indirect branches in the kernel"
544 Compile the kernel with the expoline compiler options to guard
545 against kernel-to-user data leaks by avoiding speculative indirect
547 Requires a compiler with -mindirect-branch=thunk support for full
548 protection. The kernel may run slower.
552 config EXPOLINE_EXTERN
555 depends on CC_IS_GCC && GCC_VERSION >= 110200
556 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
557 prompt "Generate expolines as extern functions."
559 This option is required for some tooling like kpatch. The kernel is
560 compiled with -mindirect-branch=thunk-extern and requires a newer
566 prompt "Expoline default"
568 default EXPOLINE_FULL
571 bool "spectre_v2=off"
574 bool "spectre_v2=auto"
584 This builds a kernel image that retains relocation information
585 so it can be loaded at an arbitrary address.
586 The kernel is linked as a position-independent executable (PIE)
587 and contains dynamic relocations which are processed early in the
589 The relocations make the kernel image about 15% larger (compressed
590 10%), but are discarded at runtime.
591 Note: this option exists only for documentation purposes, please do
594 config RANDOMIZE_BASE
595 bool "Randomize the address of the kernel image (KASLR)"
598 In support of Kernel Address Space Layout Randomization (KASLR),
599 this randomizes the address at which the kernel image is loaded,
600 as a security feature that deters exploit attempts relying on
601 knowledge of the location of kernel internals.
607 config ARCH_SPARSEMEM_ENABLE
609 select SPARSEMEM_VMEMMAP_ENABLE
610 select SPARSEMEM_VMEMMAP
612 config ARCH_SPARSEMEM_DEFAULT
615 config MAX_PHYSMEM_BITS
616 int "Maximum size of supported physical memory in bits (42-53)"
620 This option specifies the maximum supported size of physical memory
621 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
622 Increasing the number of bits also increases the kernel image size.
623 By default 46 bits (64TB) are supported.
627 depends on !VMAP_STACK
628 prompt "Detect kernel stack overflow"
630 This option enables the compiler option -mstack-guard and
631 -mstack-size if they are available. If the compiler supports them
632 it will emit additional code to each function prolog to trigger
633 an illegal operation if the kernel stack is about to overflow.
635 Say N if you are unsure.
638 int "Size of the guard area (128-1024)"
640 depends on CHECK_STACK
643 This allows you to specify the size of the guard area at the lower
644 end of the kernel stack. If the kernel stack points into the guard
645 area on function entry an illegal operation is triggered. The size
646 needs to be a power of 2. Please keep in mind that the size of an
647 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
648 The minimum size for the stack guard should be 256 for 31 bit and
657 prompt "QDIO support"
659 This driver provides the Queued Direct I/O base support for
662 To compile this driver as a module, choose M here: the
663 module will be called qdio.
669 config PCI_NR_FUNCTIONS
670 int "Maximum number of PCI functions (1-4096)"
674 This allows you to specify the maximum number of PCI functions which
675 this kernel will support.
684 prompt "Support for CHSC subchannels"
686 This driver allows usage of CHSC subchannels. A CHSC subchannel
687 is usually present on LPAR only.
688 The driver creates a device /dev/chsc, which may be used to
689 obtain I/O configuration information about the machine and
690 to issue asynchronous chsc commands (DANGEROUS).
691 You will usually only want to use this interface on a special
692 LPAR designated for system management.
694 To compile this driver as a module, choose M here: the
695 module will be called chsc_sch.
701 prompt "SCM bus driver"
703 Bus driver for Storage Class Memory.
707 prompt "Support for EADM subchannels"
710 This driver allows usage of EADM subchannels. EADM subchannels act
711 as a communication vehicle for SCM increments.
713 To compile this driver as a module, choose M here: the
714 module will be called eadm_sch.
718 prompt "Support for VFIO-CCW subchannels"
719 depends on S390_CCW_IOMMU
723 This driver allows usage of I/O subchannels via VFIO-CCW.
725 To compile this driver as a module, choose M here: the
726 module will be called vfio_ccw.
730 prompt "VFIO support for AP devices"
731 depends on S390_AP_IOMMU && KVM
736 This driver grants access to Adjunct Processor (AP) devices
737 via the VFIO mediated device interface.
739 To compile this driver as a module, choose M here: the module
740 will be called vfio_ap.
747 bool "kernel crash dumps"
750 Generate crash dump after being started by kexec.
751 Crash dump kernels are loaded in the main kernel with kexec-tools
752 into a specially reserved region and then later executed after
753 a crash by kdump/kexec.
754 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
755 This option also enables s390 zfcpdump.
756 See also <file:Documentation/s390/zfcpdump.rst>
765 default (SMC || CCWGROUP)
767 menu "Virtualization"
769 config PROTECTED_VIRTUALIZATION_GUEST
771 prompt "Protected virtualization guest support"
773 Select this option, if you want to be able to run this
774 kernel as a protected virtualization KVM guest.
775 Protected virtualization capable machines have a mini hypervisor
776 located at machine level (an ultravisor). With help of the
777 Ultravisor, KVM will be able to run "protected" VMs, special
778 VMs whose memory and management data are unavailable to KVM.
782 prompt "Pseudo page fault support"
784 Select this option, if you want to use PFAULT pseudo page fault
785 handling under VM. If running native or in LPAR, this option
786 has no effect. If your VM does not support PFAULT, PAGEEX
787 pseudo page fault handling will be used.
788 Note that VM 4.2 supports PFAULT but has a bug in its
789 implementation that causes some problems.
790 Everybody who wants to run Linux under VM != VM4.2 should select
795 prompt "Cooperative memory management"
797 Select this option, if you want to enable the kernel interface
798 to reduce the memory size of the system. This is accomplished
799 by allocating pages of memory and put them "on hold". This only
800 makes sense for a system running under VM where the unused pages
801 will be reused by VM for other guest systems. The interface
802 allows an external monitor to balance memory of many systems.
803 Everybody who wants to run Linux under VM should select this
808 prompt "IUCV special message interface to cooperative memory management"
809 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
811 Select this option to enable the special message interface to
812 the cooperative memory management.
816 prompt "Linux - VM Monitor Stream, base infrastructure"
817 depends on PROC_SYSCTL
819 This provides a kernel interface for creating and updating z/VM APPLDATA
820 monitor records. The monitor records are updated at certain time
821 intervals, once the timer is started.
822 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
823 i.e. enables or disables monitoring on the Linux side.
824 A custom interval value (in seconds) can be written to
825 /proc/appldata/interval.
827 Defaults are 60 seconds interval and timer off.
828 The /proc entries can also be read from, showing the current settings.
832 prompt "Monitor memory management statistics"
833 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
835 This provides memory management related data to the Linux - VM Monitor
836 Stream, like paging/swapping rate, memory utilisation, etc.
837 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
838 APPLDATA monitor record, i.e. enables or disables monitoring this record
842 The /proc entry can also be read from, showing the current settings.
844 This can also be compiled as a module, which will be called
849 prompt "Monitor OS statistics"
850 depends on APPLDATA_BASE
852 This provides OS related data to the Linux - VM Monitor Stream, like
853 CPU utilisation, etc.
854 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
855 APPLDATA monitor record, i.e. enables or disables monitoring this record
859 This can also be compiled as a module, which will be called
862 config APPLDATA_NET_SUM
864 prompt "Monitor overall network statistics"
865 depends on APPLDATA_BASE && NET
867 This provides network related data to the Linux - VM Monitor Stream,
868 currently there is only a total sum of network I/O statistics, no
870 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
871 APPLDATA monitor record, i.e. enables or disables monitoring this record
875 This can also be compiled as a module, which will be called
880 prompt "s390 hypervisor file system support"
881 select SYS_HYPERVISOR
883 This is a virtual file system intended to provide accounting
884 information in an s390 hypervisor environment.
886 source "arch/s390/kvm/Kconfig"
890 prompt "s390 support for virtio devices"
892 select VIRTUALIZATION
895 Enabling this option adds support for virtio based paravirtual device
898 Select this option if you want to run the kernel as a guest under
903 config S390_MODULES_SANITY_TEST_HELPERS
908 config S390_UNWIND_SELFTEST
911 default KUNIT_ALL_TESTS
912 prompt "Test unwind functions"
914 This option enables s390 specific stack unwinder testing kernel
915 module. This option is not useful for distributions or general
916 kernels, but only for kernel developers working on architecture code.
918 Say N if you are unsure.
920 config S390_KPROBES_SANITY_TEST
922 prompt "Enable s390 specific kprobes tests"
926 This option enables an s390 specific kprobes test module. This option
927 is not useful for distributions or general kernels, but only for kernel
928 developers working on architecture code.
930 Say N if you are unsure.
932 config S390_MODULES_SANITY_TEST
935 default KUNIT_ALL_TESTS
936 prompt "Enable s390 specific modules tests"
937 select S390_MODULES_SANITY_TEST_HELPERS
939 This option enables an s390 specific modules test. This option is
940 not useful for distributions or general kernels, but only for
941 kernel developers working on architecture code.
943 Say N if you are unsure.