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
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
203 select HAVE_PAGE_SIZE_4KB
205 select HAVE_PERF_EVENTS
206 select HAVE_PERF_REGS
207 select HAVE_PERF_USER_STACK_DUMP
208 select HAVE_REGS_AND_STACK_ACCESS_API
209 select HAVE_RELIABLE_STACKTRACE
212 select HAVE_SAMPLE_FTRACE_DIRECT
213 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
214 select HAVE_SETUP_PER_CPU_AREA
215 select HAVE_SOFTIRQ_ON_OWN_STACK
216 select HAVE_SYSCALL_TRACEPOINTS
217 select HAVE_VIRT_CPU_ACCOUNTING
218 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
219 select IOMMU_HELPER if PCI
220 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
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 && !LD_IS_LLD
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.
466 int "Maximum number of CPUs (2-512)"
470 This allows you to specify the maximum number of CPUs which this
471 kernel will support. The maximum supported value is 512 and the
472 minimum value which makes sense is 2.
474 This is purely to save memory - each supported CPU adds
475 approximately sixteen kilobytes to the kernel image.
482 depends on SCHED_TOPOLOGY
487 This option adds NUMA support to the kernel.
500 config SCHED_TOPOLOGY
502 prompt "Topology scheduler support"
506 Topology scheduler support improves the CPU scheduler's decision
507 making when dealing with machines that have multi-threading,
508 multiple cores or multiple books.
510 source "kernel/Kconfig.hz"
513 bool "Get user certificates via DIAG320"
515 select CRYPTO_LIB_SHA256
517 Enable this option if you want to access user-provided secure boot
518 certificates via DIAG 0x320.
520 These certificates will be made available via the keyring named
525 prompt "Enable modified branch prediction for the kernel by default"
527 If this option is selected the kernel will switch to a modified
528 branch prediction mode if the firmware interface is available.
529 The modified branch prediction mode improves the behaviour in
530 regard to speculative execution.
532 With the option enabled the kernel parameter "nobp=0" or "nospec"
533 can be used to run the kernel in the normal branch prediction mode.
535 With the option disabled the modified branch prediction mode is
536 enabled with the "nobp=1" kernel parameter.
542 depends on $(cc-option,-mindirect-branch=thunk)
543 prompt "Avoid speculative indirect branches in the kernel"
545 Compile the kernel with the expoline compiler options to guard
546 against kernel-to-user data leaks by avoiding speculative indirect
548 Requires a compiler with -mindirect-branch=thunk support for full
549 protection. The kernel may run slower.
553 config EXPOLINE_EXTERN
556 depends on CC_IS_GCC && GCC_VERSION >= 110200
557 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
558 prompt "Generate expolines as extern functions."
560 This option is required for some tooling like kpatch. The kernel is
561 compiled with -mindirect-branch=thunk-extern and requires a newer
567 prompt "Expoline default"
569 default EXPOLINE_FULL
572 bool "spectre_v2=off"
575 bool "spectre_v2=auto"
585 This builds a kernel image that retains relocation information
586 so it can be loaded at an arbitrary address.
587 The relocations make the kernel image about 15% larger (compressed
588 10%), but are discarded at runtime.
589 Note: this option exists only for documentation purposes, please do
593 def_bool CC_IS_CLANG && !$(cc-option,-munaligned-symbols)
595 If the compiler is unable to generate code that can manage unaligned
596 symbols, the kernel is linked as a position-independent executable
597 (PIE) and includes dynamic relocations that are processed early
600 For kpatch functionality, it is recommended to build the kernel
601 without the PIE_BUILD option. PIE_BUILD is only enabled when the
602 compiler lacks proper support for handling unaligned symbols.
604 config RANDOMIZE_BASE
605 bool "Randomize the address of the kernel image (KASLR)"
608 In support of Kernel Address Space Layout Randomization (KASLR),
609 this randomizes the address at which the kernel image is loaded,
610 as a security feature that deters exploit attempts relying on
611 knowledge of the location of kernel internals.
617 config ARCH_SPARSEMEM_ENABLE
619 select SPARSEMEM_VMEMMAP_ENABLE
620 select SPARSEMEM_VMEMMAP
622 config ARCH_SPARSEMEM_DEFAULT
625 config MAX_PHYSMEM_BITS
626 int "Maximum size of supported physical memory in bits (42-53)"
630 This option specifies the maximum supported size of physical memory
631 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
632 Increasing the number of bits also increases the kernel image size.
633 By default 46 bits (64TB) are supported.
637 depends on !VMAP_STACK
638 prompt "Detect kernel stack overflow"
640 This option enables the compiler option -mstack-guard and
641 -mstack-size if they are available. If the compiler supports them
642 it will emit additional code to each function prolog to trigger
643 an illegal operation if the kernel stack is about to overflow.
645 Say N if you are unsure.
648 int "Size of the guard area (128-1024)"
650 depends on CHECK_STACK
653 This allows you to specify the size of the guard area at the lower
654 end of the kernel stack. If the kernel stack points into the guard
655 area on function entry an illegal operation is triggered. The size
656 needs to be a power of 2. Please keep in mind that the size of an
657 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
658 The minimum size for the stack guard should be 256 for 31 bit and
667 prompt "QDIO support"
669 This driver provides the Queued Direct I/O base support for
672 To compile this driver as a module, choose M here: the
673 module will be called qdio.
679 config PCI_NR_FUNCTIONS
680 int "Maximum number of PCI functions (1-4096)"
684 This allows you to specify the maximum number of PCI functions which
685 this kernel will support.
694 prompt "Support for CHSC subchannels"
696 This driver allows usage of CHSC subchannels. A CHSC subchannel
697 is usually present on LPAR only.
698 The driver creates a device /dev/chsc, which may be used to
699 obtain I/O configuration information about the machine and
700 to issue asynchronous chsc commands (DANGEROUS).
701 You will usually only want to use this interface on a special
702 LPAR designated for system management.
704 To compile this driver as a module, choose M here: the
705 module will be called chsc_sch.
711 prompt "SCM bus driver"
713 Bus driver for Storage Class Memory.
717 prompt "Support for EADM subchannels"
720 This driver allows usage of EADM subchannels. EADM subchannels act
721 as a communication vehicle for SCM increments.
723 To compile this driver as a module, choose M here: the
724 module will be called eadm_sch.
728 prompt "Support for VFIO-CCW subchannels"
732 This driver allows usage of I/O subchannels via VFIO-CCW.
734 To compile this driver as a module, choose M here: the
735 module will be called vfio_ccw.
739 prompt "VFIO support for AP devices"
745 This driver grants access to Adjunct Processor (AP) devices
746 via the VFIO mediated device interface.
748 To compile this driver as a module, choose M here: the module
749 will be called vfio_ap.
758 default (SMC || CCWGROUP)
760 menu "Virtualization"
762 config PROTECTED_VIRTUALIZATION_GUEST
764 prompt "Protected virtualization guest support"
766 Select this option, if you want to be able to run this
767 kernel as a protected virtualization KVM guest.
768 Protected virtualization capable machines have a mini hypervisor
769 located at machine level (an ultravisor). With help of the
770 Ultravisor, KVM will be able to run "protected" VMs, special
771 VMs whose memory and management data are unavailable to KVM.
775 prompt "Pseudo page fault support"
777 Select this option, if you want to use PFAULT pseudo page fault
778 handling under VM. If running native or in LPAR, this option
779 has no effect. If your VM does not support PFAULT, PAGEEX
780 pseudo page fault handling will be used.
781 Note that VM 4.2 supports PFAULT but has a bug in its
782 implementation that causes some problems.
783 Everybody who wants to run Linux under VM != VM4.2 should select
788 prompt "Cooperative memory management"
790 Select this option, if you want to enable the kernel interface
791 to reduce the memory size of the system. This is accomplished
792 by allocating pages of memory and put them "on hold". This only
793 makes sense for a system running under VM where the unused pages
794 will be reused by VM for other guest systems. The interface
795 allows an external monitor to balance memory of many systems.
796 Everybody who wants to run Linux under VM should select this
801 prompt "IUCV special message interface to cooperative memory management"
802 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
804 Select this option to enable the special message interface to
805 the cooperative memory management.
809 prompt "Linux - VM Monitor Stream, base infrastructure"
810 depends on PROC_SYSCTL
812 This provides a kernel interface for creating and updating z/VM APPLDATA
813 monitor records. The monitor records are updated at certain time
814 intervals, once the timer is started.
815 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
816 i.e. enables or disables monitoring on the Linux side.
817 A custom interval value (in seconds) can be written to
818 /proc/appldata/interval.
820 Defaults are 60 seconds interval and timer off.
821 The /proc entries can also be read from, showing the current settings.
825 prompt "Monitor memory management statistics"
826 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
828 This provides memory management related data to the Linux - VM Monitor
829 Stream, like paging/swapping rate, memory utilisation, etc.
830 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
831 APPLDATA monitor record, i.e. enables or disables monitoring this record
835 The /proc entry can also be read from, showing the current settings.
837 This can also be compiled as a module, which will be called
842 prompt "Monitor OS statistics"
843 depends on APPLDATA_BASE
845 This provides OS related data to the Linux - VM Monitor Stream, like
846 CPU utilisation, etc.
847 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
848 APPLDATA monitor record, i.e. enables or disables monitoring this record
852 This can also be compiled as a module, which will be called
855 config APPLDATA_NET_SUM
857 prompt "Monitor overall network statistics"
858 depends on APPLDATA_BASE && NET
860 This provides network related data to the Linux - VM Monitor Stream,
861 currently there is only a total sum of network I/O statistics, no
863 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
864 APPLDATA monitor record, i.e. enables or disables monitoring this record
868 This can also be compiled as a module, which will be called
873 prompt "s390 hypervisor information"
875 This provides several binary files at (debugfs)/s390_hypfs/ to
876 provide accounting information in an s390 hypervisor environment.
880 prompt "s390 hypervisor file system support"
881 select SYS_HYPERVISOR
882 depends on S390_HYPFS
884 This is a virtual file system intended to provide accounting
885 information in an s390 hypervisor environment. This file system
886 is deprecated and should not be used.
888 Say N if you are unsure.
890 source "arch/s390/kvm/Kconfig"
894 prompt "s390 support for virtio devices"
896 select VIRTUALIZATION
899 Enabling this option adds support for virtio based paravirtual device
902 Select this option if you want to run the kernel as a guest under
907 config S390_MODULES_SANITY_TEST_HELPERS
912 config S390_UNWIND_SELFTEST
915 default KUNIT_ALL_TESTS
916 prompt "Test unwind functions"
918 This option enables s390 specific stack unwinder testing kernel
919 module. This option is not useful for distributions or general
920 kernels, but only for kernel developers working on architecture code.
922 Say N if you are unsure.
924 config S390_KPROBES_SANITY_TEST
926 prompt "Enable s390 specific kprobes tests"
930 This option enables an s390 specific kprobes test module. This option
931 is not useful for distributions or general kernels, but only for kernel
932 developers working on architecture code.
934 Say N if you are unsure.
936 config S390_MODULES_SANITY_TEST
939 default KUNIT_ALL_TESTS
940 prompt "Enable s390 specific modules tests"
941 select S390_MODULES_SANITY_TEST_HELPERS
943 This option enables an s390 specific modules test. This option is
944 not useful for distributions or general kernels, but only for
945 kernel developers working on architecture code.
947 Say N if you are unsure.