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_MEMBARRIER_SYNC_CORE
76 select ARCH_HAS_MEM_ENCRYPT
77 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
78 select ARCH_HAS_PTE_SPECIAL
79 select ARCH_HAS_SCALED_CPUTIME
80 select ARCH_HAS_SET_DIRECT_MAP
81 select ARCH_HAS_SET_MEMORY
82 select ARCH_HAS_STRICT_KERNEL_RWX
83 select ARCH_HAS_STRICT_MODULE_RWX
84 select ARCH_HAS_SYSCALL_WRAPPER
85 select ARCH_HAS_UBSAN_SANITIZE_ALL
86 select ARCH_HAS_VDSO_DATA
87 select ARCH_HAVE_NMI_SAFE_CMPXCHG
88 select ARCH_INLINE_READ_LOCK
89 select ARCH_INLINE_READ_LOCK_BH
90 select ARCH_INLINE_READ_LOCK_IRQ
91 select ARCH_INLINE_READ_LOCK_IRQSAVE
92 select ARCH_INLINE_READ_TRYLOCK
93 select ARCH_INLINE_READ_UNLOCK
94 select ARCH_INLINE_READ_UNLOCK_BH
95 select ARCH_INLINE_READ_UNLOCK_IRQ
96 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
97 select ARCH_INLINE_SPIN_LOCK
98 select ARCH_INLINE_SPIN_LOCK_BH
99 select ARCH_INLINE_SPIN_LOCK_IRQ
100 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
101 select ARCH_INLINE_SPIN_TRYLOCK
102 select ARCH_INLINE_SPIN_TRYLOCK_BH
103 select ARCH_INLINE_SPIN_UNLOCK
104 select ARCH_INLINE_SPIN_UNLOCK_BH
105 select ARCH_INLINE_SPIN_UNLOCK_IRQ
106 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
107 select ARCH_INLINE_WRITE_LOCK
108 select ARCH_INLINE_WRITE_LOCK_BH
109 select ARCH_INLINE_WRITE_LOCK_IRQ
110 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
111 select ARCH_INLINE_WRITE_TRYLOCK
112 select ARCH_INLINE_WRITE_UNLOCK
113 select ARCH_INLINE_WRITE_UNLOCK_BH
114 select ARCH_INLINE_WRITE_UNLOCK_IRQ
115 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
116 select ARCH_STACKWALK
117 select ARCH_SUPPORTS_ATOMIC_RMW
118 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
119 select ARCH_SUPPORTS_HUGETLBFS
120 select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && CC_IS_CLANG
121 select ARCH_SUPPORTS_NUMA_BALANCING
122 select ARCH_SUPPORTS_PER_VMA_LOCK
123 select ARCH_USE_BUILTIN_BSWAP
124 select ARCH_USE_CMPXCHG_LOCKREF
125 select ARCH_USE_SYM_ANNOTATIONS
126 select ARCH_WANTS_NO_INSTR
127 select ARCH_WANT_DEFAULT_BPF_JIT
128 select ARCH_WANT_IPC_PARSE_VERSION
129 select ARCH_WANT_KERNEL_PMD_MKWRITE
130 select ARCH_WANT_LD_ORPHAN_WARN
131 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
132 select BUILDTIME_TABLE_SORT
133 select CLONE_BACKWARDS2
134 select DCACHE_WORD_ACCESS if !KMSAN
135 select DMA_OPS if PCI
136 select DYNAMIC_FTRACE if FUNCTION_TRACER
137 select FUNCTION_ALIGNMENT_8B if CC_IS_GCC
138 select FUNCTION_ALIGNMENT_16B if !CC_IS_GCC
139 select GENERIC_ALLOCATOR
140 select GENERIC_CPU_AUTOPROBE
141 select GENERIC_CPU_VULNERABILITIES
143 select GENERIC_GETTIMEOFDAY
144 select GENERIC_PTDUMP
145 select GENERIC_SMP_IDLE_THREAD
146 select GENERIC_TIME_VSYSCALL
147 select GENERIC_VDSO_TIME_NS
148 select GENERIC_IOREMAP if PCI
149 select HAVE_ALIGNED_STRUCT_PAGE
150 select HAVE_ARCH_AUDITSYSCALL
151 select HAVE_ARCH_JUMP_LABEL
152 select HAVE_ARCH_JUMP_LABEL_RELATIVE
153 select HAVE_ARCH_KASAN
154 select HAVE_ARCH_KASAN_VMALLOC
155 select HAVE_ARCH_KCSAN
156 select HAVE_ARCH_KFENCE
157 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
158 select HAVE_ARCH_SECCOMP_FILTER
159 select HAVE_ARCH_SOFT_DIRTY
160 select HAVE_ARCH_STACKLEAK
161 select HAVE_ARCH_TRACEHOOK
162 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
163 select HAVE_ARCH_VMAP_STACK
164 select HAVE_ASM_MODVERSIONS
165 select HAVE_CMPXCHG_DOUBLE
166 select HAVE_CMPXCHG_LOCAL
167 select HAVE_DEBUG_KMEMLEAK
168 select HAVE_DMA_CONTIGUOUS
169 select HAVE_DYNAMIC_FTRACE
170 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
171 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
172 select HAVE_DYNAMIC_FTRACE_WITH_REGS
173 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
174 select HAVE_EFFICIENT_UNALIGNED_ACCESS
177 select HAVE_FTRACE_MCOUNT_RECORD
178 select HAVE_FUNCTION_ARG_ACCESS_API
179 select HAVE_FUNCTION_ERROR_INJECTION
180 select HAVE_FUNCTION_GRAPH_RETVAL
181 select HAVE_FUNCTION_GRAPH_TRACER
182 select HAVE_FUNCTION_TRACER
183 select HAVE_GCC_PLUGINS
184 select HAVE_GENERIC_VDSO
185 select HAVE_IOREMAP_PROT if PCI
186 select HAVE_KERNEL_BZIP2
187 select HAVE_KERNEL_GZIP
188 select HAVE_KERNEL_LZ4
189 select HAVE_KERNEL_LZMA
190 select HAVE_KERNEL_LZO
191 select HAVE_KERNEL_UNCOMPRESSED
192 select HAVE_KERNEL_XZ
193 select HAVE_KERNEL_ZSTD
195 select HAVE_KPROBES_ON_FTRACE
196 select HAVE_KRETPROBES
198 select HAVE_LIVEPATCH
199 select HAVE_MEMBLOCK_PHYS_MAP
200 select HAVE_MOD_ARCH_SPECIFIC
202 select HAVE_NOP_MCOUNT
204 select HAVE_PERF_EVENTS
205 select HAVE_PERF_REGS
206 select HAVE_PERF_USER_STACK_DUMP
207 select HAVE_REGS_AND_STACK_ACCESS_API
208 select HAVE_RELIABLE_STACKTRACE
211 select HAVE_SAMPLE_FTRACE_DIRECT
212 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
213 select HAVE_SETUP_PER_CPU_AREA
214 select HAVE_SOFTIRQ_ON_OWN_STACK
215 select HAVE_SYSCALL_TRACEPOINTS
216 select HAVE_VIRT_CPU_ACCOUNTING
217 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
218 select IOMMU_HELPER if PCI
219 select IOMMU_SUPPORT if PCI
220 select MMU_GATHER_MERGE_VMAS
221 select MMU_GATHER_NO_GATHER
222 select MMU_GATHER_RCU_TABLE_FREE
223 select MODULES_USE_ELF_RELA
224 select NEED_DMA_MAP_STATE if PCI
225 select NEED_PER_CPU_EMBED_FIRST_CHUNK
226 select NEED_SG_DMA_LENGTH if PCI
228 select OLD_SIGSUSPEND3
229 select PCI_DOMAINS if PCI
230 select PCI_MSI if PCI
231 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
234 select SYSCTL_EXCEPTION_TRACE
235 select THREAD_INFO_IN_TASK
236 select TRACE_IRQFLAGS_SUPPORT
238 select USER_STACKTRACE_SUPPORT
239 select VIRT_CPU_ACCOUNTING
241 # Note: keep the above list sorted alphabetically
243 config SCHED_OMIT_FRAME_POINTER
246 config PGTABLE_LEVELS
250 source "kernel/livepatch/Kconfig"
252 config ARCH_SUPPORTS_KEXEC
255 config ARCH_SUPPORTS_KEXEC_FILE
258 config ARCH_SUPPORTS_KEXEC_SIG
259 def_bool MODULE_SIG_FORMAT
261 config ARCH_SUPPORTS_KEXEC_PURGATORY
264 config ARCH_SUPPORTS_CRASH_DUMP
267 Refer to <file:Documentation/arch/s390/zfcpdump.rst> for more details on this.
268 This option also enables s390 zfcpdump.
269 See also <file:Documentation/arch/s390/zfcpdump.rst>
271 menu "Processor type and features"
273 config HAVE_MARCH_Z10_FEATURES
276 config HAVE_MARCH_Z196_FEATURES
278 select HAVE_MARCH_Z10_FEATURES
280 config HAVE_MARCH_ZEC12_FEATURES
282 select HAVE_MARCH_Z196_FEATURES
284 config HAVE_MARCH_Z13_FEATURES
286 select HAVE_MARCH_ZEC12_FEATURES
288 config HAVE_MARCH_Z14_FEATURES
290 select HAVE_MARCH_Z13_FEATURES
292 config HAVE_MARCH_Z15_FEATURES
294 select HAVE_MARCH_Z14_FEATURES
296 config HAVE_MARCH_Z16_FEATURES
298 select HAVE_MARCH_Z15_FEATURES
301 prompt "Processor type"
305 bool "IBM System z10"
306 select HAVE_MARCH_Z10_FEATURES
307 depends on $(cc-option,-march=z10)
309 Select this to enable optimizations for IBM System z10 (2097 and 2098
310 series). This is the oldest machine generation currently supported.
313 bool "IBM zEnterprise 114 and 196"
314 select HAVE_MARCH_Z196_FEATURES
315 depends on $(cc-option,-march=z196)
317 Select this to enable optimizations for IBM zEnterprise 114 and 196
318 (2818 and 2817 series). The kernel will be slightly faster but will
319 not work on older machines.
322 bool "IBM zBC12 and zEC12"
323 select HAVE_MARCH_ZEC12_FEATURES
324 depends on $(cc-option,-march=zEC12)
326 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
327 2827 series). The kernel will be slightly faster but will not work on
331 bool "IBM z13s and z13"
332 select HAVE_MARCH_Z13_FEATURES
333 depends on $(cc-option,-march=z13)
335 Select this to enable optimizations for IBM z13s and z13 (2965 and
336 2964 series). The kernel will be slightly faster but will not work on
340 bool "IBM z14 ZR1 and z14"
341 select HAVE_MARCH_Z14_FEATURES
342 depends on $(cc-option,-march=z14)
344 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
345 and 3906 series). The kernel will be slightly faster but will not
346 work on older machines.
350 select HAVE_MARCH_Z15_FEATURES
351 depends on $(cc-option,-march=z15)
353 Select this to enable optimizations for IBM z15 (8562
354 and 8561 series). The kernel will be slightly faster but will not
355 work on older machines.
359 select HAVE_MARCH_Z16_FEATURES
360 depends on $(cc-option,-march=z16)
362 Select this to enable optimizations for IBM z16 (3931 and
367 config MARCH_Z10_TUNE
368 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
370 config MARCH_Z196_TUNE
371 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
373 config MARCH_ZEC12_TUNE
374 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
376 config MARCH_Z13_TUNE
377 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
379 config MARCH_Z14_TUNE
380 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
382 config MARCH_Z15_TUNE
383 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
385 config MARCH_Z16_TUNE
386 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
389 prompt "Tune code generation"
392 Cause the compiler to tune (-mtune) the generated code for a machine.
393 This will make the code run faster on the selected machine but
394 somewhat slower on other machines.
395 This option only changes how the compiler emits instructions, not the
396 selection of instructions itself, so the resulting kernel will run on
402 Tune the generated code for the target processor for which the kernel
406 bool "IBM System z10"
409 bool "IBM zEnterprise 114 and 196"
410 depends on $(cc-option,-mtune=z196)
413 bool "IBM zBC12 and zEC12"
414 depends on $(cc-option,-mtune=zEC12)
417 bool "IBM z13s and z13"
418 depends on $(cc-option,-mtune=z13)
421 bool "IBM z14 ZR1 and z14"
422 depends on $(cc-option,-mtune=z14)
426 depends on $(cc-option,-mtune=z15)
430 depends on $(cc-option,-mtune=z16)
437 config COMMAND_LINE_SIZE
438 int "Maximum size of kernel command line"
442 This allows you to specify the maximum length of the kernel command
447 prompt "Kernel support for 31 bit emulation"
448 select ARCH_WANT_OLD_COMPAT_IPC
449 select COMPAT_OLD_SIGACTION
452 depends on !CC_IS_CLANG && !LD_IS_LLD
454 Select this option if you want to enable your system kernel to
455 handle system-calls from ELF binaries for 31 bit ESA. This option
456 (and some other stuff like libraries and such) is needed for
457 executing 31 bit applications.
465 int "Maximum number of CPUs (2-512)"
469 This allows you to specify the maximum number of CPUs which this
470 kernel will support. The maximum supported value is 512 and the
471 minimum value which makes sense is 2.
473 This is purely to save memory - each supported CPU adds
474 approximately sixteen kilobytes to the kernel image.
481 depends on SCHED_TOPOLOGY
486 This option adds NUMA support to the kernel.
499 config SCHED_TOPOLOGY
501 prompt "Topology scheduler support"
505 Topology scheduler support improves the CPU scheduler's decision
506 making when dealing with machines that have multi-threading,
507 multiple cores or multiple books.
509 source "kernel/Kconfig.hz"
512 bool "Get user certificates via DIAG320"
514 select CRYPTO_LIB_SHA256
516 Enable this option if you want to access user-provided secure boot
517 certificates via DIAG 0x320.
519 These certificates will be made available via the keyring named
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 $(CC))
557 prompt "Generate expolines as extern functions."
559 This option is required for some tooling like kpatch. The kernel is
560 compiled with -mindirect-branch=thunk-extern and requires a newer
566 prompt "Expoline default"
568 default EXPOLINE_FULL
571 bool "spectre_v2=off"
574 bool "spectre_v2=auto"
584 This builds a kernel image that retains relocation information
585 so it can be loaded at an arbitrary address.
586 The relocations make the kernel image about 15% larger (compressed
587 10%), but are discarded at runtime.
588 Note: this option exists only for documentation purposes, please do
592 def_bool CC_IS_CLANG && !$(cc-option,-munaligned-symbols)
594 If the compiler is unable to generate code that can manage unaligned
595 symbols, the kernel is linked as a position-independent executable
596 (PIE) and includes dynamic relocations that are processed early
599 For kpatch functionality, it is recommended to build the kernel
600 without the PIE_BUILD option. PIE_BUILD is only enabled when the
601 compiler lacks proper support for handling unaligned symbols.
603 config RANDOMIZE_BASE
604 bool "Randomize the address of the kernel image (KASLR)"
607 In support of Kernel Address Space Layout Randomization (KASLR),
608 this randomizes the address at which the kernel image is loaded,
609 as a security feature that deters exploit attempts relying on
610 knowledge of the location of kernel internals.
616 config ARCH_SPARSEMEM_ENABLE
618 select SPARSEMEM_VMEMMAP_ENABLE
619 select SPARSEMEM_VMEMMAP
621 config ARCH_SPARSEMEM_DEFAULT
624 config MAX_PHYSMEM_BITS
625 int "Maximum size of supported physical memory in bits (42-53)"
629 This option specifies the maximum supported size of physical memory
630 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
631 Increasing the number of bits also increases the kernel image size.
632 By default 46 bits (64TB) are supported.
636 depends on !VMAP_STACK
637 prompt "Detect kernel stack overflow"
639 This option enables the compiler option -mstack-guard and
640 -mstack-size if they are available. If the compiler supports them
641 it will emit additional code to each function prolog to trigger
642 an illegal operation if the kernel stack is about to overflow.
644 Say N if you are unsure.
647 int "Size of the guard area (128-1024)"
649 depends on CHECK_STACK
652 This allows you to specify the size of the guard area at the lower
653 end of the kernel stack. If the kernel stack points into the guard
654 area on function entry an illegal operation is triggered. The size
655 needs to be a power of 2. Please keep in mind that the size of an
656 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
657 The minimum size for the stack guard should be 256 for 31 bit and
666 prompt "QDIO support"
668 This driver provides the Queued Direct I/O base support for
671 To compile this driver as a module, choose M here: the
672 module will be called qdio.
678 config PCI_NR_FUNCTIONS
679 int "Maximum number of PCI functions (1-4096)"
683 This allows you to specify the maximum number of PCI functions which
684 this kernel will support.
693 prompt "Support for CHSC subchannels"
695 This driver allows usage of CHSC subchannels. A CHSC subchannel
696 is usually present on LPAR only.
697 The driver creates a device /dev/chsc, which may be used to
698 obtain I/O configuration information about the machine and
699 to issue asynchronous chsc commands (DANGEROUS).
700 You will usually only want to use this interface on a special
701 LPAR designated for system management.
703 To compile this driver as a module, choose M here: the
704 module will be called chsc_sch.
710 prompt "SCM bus driver"
712 Bus driver for Storage Class Memory.
716 prompt "Support for EADM subchannels"
719 This driver allows usage of EADM subchannels. EADM subchannels act
720 as a communication vehicle for SCM increments.
722 To compile this driver as a module, choose M here: the
723 module will be called eadm_sch.
727 prompt "Support for VFIO-CCW subchannels"
731 This driver allows usage of I/O subchannels via VFIO-CCW.
733 To compile this driver as a module, choose M here: the
734 module will be called vfio_ccw.
738 prompt "VFIO support for AP devices"
744 This driver grants access to Adjunct Processor (AP) devices
745 via the VFIO mediated device interface.
747 To compile this driver as a module, choose M here: the module
748 will be called vfio_ap.
757 default (SMC || CCWGROUP)
759 menu "Virtualization"
761 config PROTECTED_VIRTUALIZATION_GUEST
763 prompt "Protected virtualization guest support"
765 Select this option, if you want to be able to run this
766 kernel as a protected virtualization KVM guest.
767 Protected virtualization capable machines have a mini hypervisor
768 located at machine level (an ultravisor). With help of the
769 Ultravisor, KVM will be able to run "protected" VMs, special
770 VMs whose memory and management data are unavailable to KVM.
774 prompt "Pseudo page fault support"
776 Select this option, if you want to use PFAULT pseudo page fault
777 handling under VM. If running native or in LPAR, this option
778 has no effect. If your VM does not support PFAULT, PAGEEX
779 pseudo page fault handling will be used.
780 Note that VM 4.2 supports PFAULT but has a bug in its
781 implementation that causes some problems.
782 Everybody who wants to run Linux under VM != VM4.2 should select
787 prompt "Cooperative memory management"
789 Select this option, if you want to enable the kernel interface
790 to reduce the memory size of the system. This is accomplished
791 by allocating pages of memory and put them "on hold". This only
792 makes sense for a system running under VM where the unused pages
793 will be reused by VM for other guest systems. The interface
794 allows an external monitor to balance memory of many systems.
795 Everybody who wants to run Linux under VM should select this
800 prompt "IUCV special message interface to cooperative memory management"
801 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
803 Select this option to enable the special message interface to
804 the cooperative memory management.
808 prompt "Linux - VM Monitor Stream, base infrastructure"
809 depends on PROC_SYSCTL
811 This provides a kernel interface for creating and updating z/VM APPLDATA
812 monitor records. The monitor records are updated at certain time
813 intervals, once the timer is started.
814 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
815 i.e. enables or disables monitoring on the Linux side.
816 A custom interval value (in seconds) can be written to
817 /proc/appldata/interval.
819 Defaults are 60 seconds interval and timer off.
820 The /proc entries can also be read from, showing the current settings.
824 prompt "Monitor memory management statistics"
825 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
827 This provides memory management related data to the Linux - VM Monitor
828 Stream, like paging/swapping rate, memory utilisation, etc.
829 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
830 APPLDATA monitor record, i.e. enables or disables monitoring this record
834 The /proc entry can also be read from, showing the current settings.
836 This can also be compiled as a module, which will be called
841 prompt "Monitor OS statistics"
842 depends on APPLDATA_BASE
844 This provides OS related data to the Linux - VM Monitor Stream, like
845 CPU utilisation, etc.
846 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
847 APPLDATA monitor record, i.e. enables or disables monitoring this record
851 This can also be compiled as a module, which will be called
854 config APPLDATA_NET_SUM
856 prompt "Monitor overall network statistics"
857 depends on APPLDATA_BASE && NET
859 This provides network related data to the Linux - VM Monitor Stream,
860 currently there is only a total sum of network I/O statistics, no
862 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
863 APPLDATA monitor record, i.e. enables or disables monitoring this record
867 This can also be compiled as a module, which will be called
872 prompt "s390 hypervisor information"
874 This provides several binary files at (debugfs)/s390_hypfs/ to
875 provide accounting information in an s390 hypervisor environment.
879 prompt "s390 hypervisor file system support"
880 select SYS_HYPERVISOR
881 depends on S390_HYPFS
883 This is a virtual file system intended to provide accounting
884 information in an s390 hypervisor environment. This file system
885 is deprecated and should not be used.
887 Say N if you are unsure.
889 source "arch/s390/kvm/Kconfig"
893 prompt "s390 support for virtio devices"
895 select VIRTUALIZATION
898 Enabling this option adds support for virtio based paravirtual device
901 Select this option if you want to run the kernel as a guest under
906 config S390_MODULES_SANITY_TEST_HELPERS
911 config S390_UNWIND_SELFTEST
914 default KUNIT_ALL_TESTS
915 prompt "Test unwind functions"
917 This option enables s390 specific stack unwinder testing kernel
918 module. This option is not useful for distributions or general
919 kernels, but only for kernel developers working on architecture code.
921 Say N if you are unsure.
923 config S390_KPROBES_SANITY_TEST
925 prompt "Enable s390 specific kprobes tests"
929 This option enables an s390 specific kprobes test module. This option
930 is not useful for distributions or general kernels, but only for kernel
931 developers working on architecture code.
933 Say N if you are unsure.
935 config S390_MODULES_SANITY_TEST
938 default KUNIT_ALL_TESTS
939 prompt "Enable s390 specific modules tests"
940 select S390_MODULES_SANITY_TEST_HELPERS
942 This option enables an s390 specific modules test. This option is
943 not useful for distributions or general kernels, but only for
944 kernel developers working on architecture code.
946 Say N if you are unsure.