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_DYNAMIC_TASK_STRUCT
127 select ARCH_WANTS_NO_INSTR
128 select ARCH_WANT_DEFAULT_BPF_JIT
129 select ARCH_WANT_IPC_PARSE_VERSION
130 select ARCH_WANT_KERNEL_PMD_MKWRITE
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 if SLUB
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
221 select MMU_GATHER_MERGE_VMAS
222 select MMU_GATHER_NO_GATHER
223 select MMU_GATHER_RCU_TABLE_FREE
224 select MODULES_USE_ELF_RELA
225 select NEED_DMA_MAP_STATE if PCI
226 select NEED_PER_CPU_EMBED_FIRST_CHUNK
227 select NEED_SG_DMA_LENGTH if PCI
229 select OLD_SIGSUSPEND3
230 select PCI_DOMAINS if PCI
231 select PCI_MSI if PCI
232 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
235 select SYSCTL_EXCEPTION_TRACE
236 select THREAD_INFO_IN_TASK
237 select TRACE_IRQFLAGS_SUPPORT
239 select USER_STACKTRACE_SUPPORT
240 select VIRT_CPU_ACCOUNTING
242 # Note: keep the above list sorted alphabetically
244 config SCHED_OMIT_FRAME_POINTER
247 config PGTABLE_LEVELS
251 source "kernel/livepatch/Kconfig"
253 config ARCH_SUPPORTS_KEXEC
256 config ARCH_SUPPORTS_KEXEC_FILE
257 def_bool CRYPTO && CRYPTO_SHA256 && CRYPTO_SHA256_S390
259 config ARCH_SUPPORTS_KEXEC_SIG
260 def_bool MODULE_SIG_FORMAT
262 config ARCH_SUPPORTS_KEXEC_PURGATORY
265 config ARCH_SUPPORTS_CRASH_DUMP
268 Refer to <file:Documentation/arch/s390/zfcpdump.rst> for more details on this.
269 This option also enables s390 zfcpdump.
270 See also <file:Documentation/arch/s390/zfcpdump.rst>
272 menu "Processor type and features"
274 config HAVE_MARCH_Z10_FEATURES
277 config HAVE_MARCH_Z196_FEATURES
279 select HAVE_MARCH_Z10_FEATURES
281 config HAVE_MARCH_ZEC12_FEATURES
283 select HAVE_MARCH_Z196_FEATURES
285 config HAVE_MARCH_Z13_FEATURES
287 select HAVE_MARCH_ZEC12_FEATURES
289 config HAVE_MARCH_Z14_FEATURES
291 select HAVE_MARCH_Z13_FEATURES
293 config HAVE_MARCH_Z15_FEATURES
295 select HAVE_MARCH_Z14_FEATURES
297 config HAVE_MARCH_Z16_FEATURES
299 select HAVE_MARCH_Z15_FEATURES
302 prompt "Processor type"
306 bool "IBM System z10"
307 select HAVE_MARCH_Z10_FEATURES
308 depends on $(cc-option,-march=z10)
310 Select this to enable optimizations for IBM System z10 (2097 and 2098
311 series). This is the oldest machine generation currently supported.
314 bool "IBM zEnterprise 114 and 196"
315 select HAVE_MARCH_Z196_FEATURES
316 depends on $(cc-option,-march=z196)
318 Select this to enable optimizations for IBM zEnterprise 114 and 196
319 (2818 and 2817 series). The kernel will be slightly faster but will
320 not work on older machines.
323 bool "IBM zBC12 and zEC12"
324 select HAVE_MARCH_ZEC12_FEATURES
325 depends on $(cc-option,-march=zEC12)
327 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
328 2827 series). The kernel will be slightly faster but will not work on
332 bool "IBM z13s and z13"
333 select HAVE_MARCH_Z13_FEATURES
334 depends on $(cc-option,-march=z13)
336 Select this to enable optimizations for IBM z13s and z13 (2965 and
337 2964 series). The kernel will be slightly faster but will not work on
341 bool "IBM z14 ZR1 and z14"
342 select HAVE_MARCH_Z14_FEATURES
343 depends on $(cc-option,-march=z14)
345 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
346 and 3906 series). The kernel will be slightly faster but will not
347 work on older machines.
351 select HAVE_MARCH_Z15_FEATURES
352 depends on $(cc-option,-march=z15)
354 Select this to enable optimizations for IBM z15 (8562
355 and 8561 series). The kernel will be slightly faster but will not
356 work on older machines.
360 select HAVE_MARCH_Z16_FEATURES
361 depends on $(cc-option,-march=z16)
363 Select this to enable optimizations for IBM z16 (3931 and
368 config MARCH_Z10_TUNE
369 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
371 config MARCH_Z196_TUNE
372 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
374 config MARCH_ZEC12_TUNE
375 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
377 config MARCH_Z13_TUNE
378 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
380 config MARCH_Z14_TUNE
381 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
383 config MARCH_Z15_TUNE
384 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
386 config MARCH_Z16_TUNE
387 def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT
390 prompt "Tune code generation"
393 Cause the compiler to tune (-mtune) the generated code for a machine.
394 This will make the code run faster on the selected machine but
395 somewhat slower on other machines.
396 This option only changes how the compiler emits instructions, not the
397 selection of instructions itself, so the resulting kernel will run on
403 Tune the generated code for the target processor for which the kernel
407 bool "IBM System z10"
410 bool "IBM zEnterprise 114 and 196"
411 depends on $(cc-option,-mtune=z196)
414 bool "IBM zBC12 and zEC12"
415 depends on $(cc-option,-mtune=zEC12)
418 bool "IBM z13s and z13"
419 depends on $(cc-option,-mtune=z13)
422 bool "IBM z14 ZR1 and z14"
423 depends on $(cc-option,-mtune=z14)
427 depends on $(cc-option,-mtune=z15)
431 depends on $(cc-option,-mtune=z16)
438 config COMMAND_LINE_SIZE
439 int "Maximum size of kernel command line"
443 This allows you to specify the maximum length of the kernel command
448 prompt "Kernel support for 31 bit emulation"
449 select ARCH_WANT_OLD_COMPAT_IPC
450 select COMPAT_OLD_SIGACTION
453 depends on !CC_IS_CLANG
455 Select this option if you want to enable your system kernel to
456 handle system-calls from ELF binaries for 31 bit ESA. This option
457 (and some other stuff like libraries and such) is needed for
458 executing 31 bit applications. It is safe to say "Y".
464 int "Maximum number of CPUs (2-512)"
468 This allows you to specify the maximum number of CPUs which this
469 kernel will support. The maximum supported value is 512 and the
470 minimum value which makes sense is 2.
472 This is purely to save memory - each supported CPU adds
473 approximately sixteen kilobytes to the kernel image.
480 depends on SCHED_TOPOLOGY
485 This option adds NUMA support to the kernel.
498 config SCHED_TOPOLOGY
500 prompt "Topology scheduler support"
504 Topology scheduler support improves the CPU scheduler's decision
505 making when dealing with machines that have multi-threading,
506 multiple cores or multiple books.
508 source "kernel/Kconfig.hz"
511 bool "Get user certificates via DIAG320"
513 select CRYPTO_LIB_SHA256
515 Enable this option if you want to access user-provided secure boot
516 certificates via DIAG 0x320.
518 These certificates will be made available via the keyring named
523 prompt "Enable modified branch prediction for the kernel by default"
525 If this option is selected the kernel will switch to a modified
526 branch prediction mode if the firmware interface is available.
527 The modified branch prediction mode improves the behaviour in
528 regard to speculative execution.
530 With the option enabled the kernel parameter "nobp=0" or "nospec"
531 can be used to run the kernel in the normal branch prediction mode.
533 With the option disabled the modified branch prediction mode is
534 enabled with the "nobp=1" kernel parameter.
540 depends on $(cc-option,-mindirect-branch=thunk)
541 prompt "Avoid speculative indirect branches in the kernel"
543 Compile the kernel with the expoline compiler options to guard
544 against kernel-to-user data leaks by avoiding speculative indirect
546 Requires a compiler with -mindirect-branch=thunk support for full
547 protection. The kernel may run slower.
551 config EXPOLINE_EXTERN
554 depends on CC_IS_GCC && GCC_VERSION >= 110200
555 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
556 prompt "Generate expolines as extern functions."
558 This option is required for some tooling like kpatch. The kernel is
559 compiled with -mindirect-branch=thunk-extern and requires a newer
565 prompt "Expoline default"
567 default EXPOLINE_FULL
570 bool "spectre_v2=off"
573 bool "spectre_v2=auto"
583 This builds a kernel image that retains relocation information
584 so it can be loaded at an arbitrary address.
585 The kernel is linked as a position-independent executable (PIE)
586 and contains dynamic relocations which are processed early in the
588 The relocations make the kernel image about 15% larger (compressed
589 10%), but are discarded at runtime.
590 Note: this option exists only for documentation purposes, please do
593 config RANDOMIZE_BASE
594 bool "Randomize the address of the kernel image (KASLR)"
597 In support of Kernel Address Space Layout Randomization (KASLR),
598 this randomizes the address at which the kernel image is loaded,
599 as a security feature that deters exploit attempts relying on
600 knowledge of the location of kernel internals.
606 config ARCH_SPARSEMEM_ENABLE
608 select SPARSEMEM_VMEMMAP_ENABLE
609 select SPARSEMEM_VMEMMAP
611 config ARCH_SPARSEMEM_DEFAULT
614 config MAX_PHYSMEM_BITS
615 int "Maximum size of supported physical memory in bits (42-53)"
619 This option specifies the maximum supported size of physical memory
620 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
621 Increasing the number of bits also increases the kernel image size.
622 By default 46 bits (64TB) are supported.
626 depends on !VMAP_STACK
627 prompt "Detect kernel stack overflow"
629 This option enables the compiler option -mstack-guard and
630 -mstack-size if they are available. If the compiler supports them
631 it will emit additional code to each function prolog to trigger
632 an illegal operation if the kernel stack is about to overflow.
634 Say N if you are unsure.
637 int "Size of the guard area (128-1024)"
639 depends on CHECK_STACK
642 This allows you to specify the size of the guard area at the lower
643 end of the kernel stack. If the kernel stack points into the guard
644 area on function entry an illegal operation is triggered. The size
645 needs to be a power of 2. Please keep in mind that the size of an
646 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
647 The minimum size for the stack guard should be 256 for 31 bit and
656 prompt "QDIO support"
658 This driver provides the Queued Direct I/O base support for
661 To compile this driver as a module, choose M here: the
662 module will be called qdio.
668 config PCI_NR_FUNCTIONS
669 int "Maximum number of PCI functions (1-4096)"
673 This allows you to specify the maximum number of PCI functions which
674 this kernel will support.
683 prompt "Support for CHSC subchannels"
685 This driver allows usage of CHSC subchannels. A CHSC subchannel
686 is usually present on LPAR only.
687 The driver creates a device /dev/chsc, which may be used to
688 obtain I/O configuration information about the machine and
689 to issue asynchronous chsc commands (DANGEROUS).
690 You will usually only want to use this interface on a special
691 LPAR designated for system management.
693 To compile this driver as a module, choose M here: the
694 module will be called chsc_sch.
700 prompt "SCM bus driver"
702 Bus driver for Storage Class Memory.
706 prompt "Support for EADM subchannels"
709 This driver allows usage of EADM subchannels. EADM subchannels act
710 as a communication vehicle for SCM increments.
712 To compile this driver as a module, choose M here: the
713 module will be called eadm_sch.
717 prompt "Support for VFIO-CCW subchannels"
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"
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.
747 default (SMC || CCWGROUP)
749 menu "Virtualization"
751 config PROTECTED_VIRTUALIZATION_GUEST
753 prompt "Protected virtualization guest support"
755 Select this option, if you want to be able to run this
756 kernel as a protected virtualization KVM guest.
757 Protected virtualization capable machines have a mini hypervisor
758 located at machine level (an ultravisor). With help of the
759 Ultravisor, KVM will be able to run "protected" VMs, special
760 VMs whose memory and management data are unavailable to KVM.
764 prompt "Pseudo page fault support"
766 Select this option, if you want to use PFAULT pseudo page fault
767 handling under VM. If running native or in LPAR, this option
768 has no effect. If your VM does not support PFAULT, PAGEEX
769 pseudo page fault handling will be used.
770 Note that VM 4.2 supports PFAULT but has a bug in its
771 implementation that causes some problems.
772 Everybody who wants to run Linux under VM != VM4.2 should select
777 prompt "Cooperative memory management"
779 Select this option, if you want to enable the kernel interface
780 to reduce the memory size of the system. This is accomplished
781 by allocating pages of memory and put them "on hold". This only
782 makes sense for a system running under VM where the unused pages
783 will be reused by VM for other guest systems. The interface
784 allows an external monitor to balance memory of many systems.
785 Everybody who wants to run Linux under VM should select this
790 prompt "IUCV special message interface to cooperative memory management"
791 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
793 Select this option to enable the special message interface to
794 the cooperative memory management.
798 prompt "Linux - VM Monitor Stream, base infrastructure"
799 depends on PROC_SYSCTL
801 This provides a kernel interface for creating and updating z/VM APPLDATA
802 monitor records. The monitor records are updated at certain time
803 intervals, once the timer is started.
804 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
805 i.e. enables or disables monitoring on the Linux side.
806 A custom interval value (in seconds) can be written to
807 /proc/appldata/interval.
809 Defaults are 60 seconds interval and timer off.
810 The /proc entries can also be read from, showing the current settings.
814 prompt "Monitor memory management statistics"
815 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
817 This provides memory management related data to the Linux - VM Monitor
818 Stream, like paging/swapping rate, memory utilisation, etc.
819 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
820 APPLDATA monitor record, i.e. enables or disables monitoring this record
824 The /proc entry can also be read from, showing the current settings.
826 This can also be compiled as a module, which will be called
831 prompt "Monitor OS statistics"
832 depends on APPLDATA_BASE
834 This provides OS related data to the Linux - VM Monitor Stream, like
835 CPU utilisation, etc.
836 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
837 APPLDATA monitor record, i.e. enables or disables monitoring this record
841 This can also be compiled as a module, which will be called
844 config APPLDATA_NET_SUM
846 prompt "Monitor overall network statistics"
847 depends on APPLDATA_BASE && NET
849 This provides network related data to the Linux - VM Monitor Stream,
850 currently there is only a total sum of network I/O statistics, no
852 Writing 1 or 0 to /proc/appldata/net_sum 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
862 prompt "s390 hypervisor information"
864 This provides several binary files at (debugfs)/s390_hypfs/ to
865 provide accounting information in an s390 hypervisor environment.
869 prompt "s390 hypervisor file system support"
870 select SYS_HYPERVISOR
871 depends on S390_HYPFS
873 This is a virtual file system intended to provide accounting
874 information in an s390 hypervisor environment. This file system
875 is deprecated and should not be used.
877 Say N if you are unsure.
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.