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_MEM_ENCRYPT
76 select ARCH_HAS_PTE_SPECIAL
77 select ARCH_HAS_SCALED_CPUTIME
78 select ARCH_HAS_SET_MEMORY
79 select ARCH_HAS_STRICT_KERNEL_RWX
80 select ARCH_HAS_STRICT_MODULE_RWX
81 select ARCH_HAS_SYSCALL_WRAPPER
82 select ARCH_HAS_UBSAN_SANITIZE_ALL
83 select ARCH_HAS_VDSO_DATA
84 select ARCH_HAVE_NMI_SAFE_CMPXCHG
85 select ARCH_INLINE_READ_LOCK
86 select ARCH_INLINE_READ_LOCK_BH
87 select ARCH_INLINE_READ_LOCK_IRQ
88 select ARCH_INLINE_READ_LOCK_IRQSAVE
89 select ARCH_INLINE_READ_TRYLOCK
90 select ARCH_INLINE_READ_UNLOCK
91 select ARCH_INLINE_READ_UNLOCK_BH
92 select ARCH_INLINE_READ_UNLOCK_IRQ
93 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
94 select ARCH_INLINE_SPIN_LOCK
95 select ARCH_INLINE_SPIN_LOCK_BH
96 select ARCH_INLINE_SPIN_LOCK_IRQ
97 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
98 select ARCH_INLINE_SPIN_TRYLOCK
99 select ARCH_INLINE_SPIN_TRYLOCK_BH
100 select ARCH_INLINE_SPIN_UNLOCK
101 select ARCH_INLINE_SPIN_UNLOCK_BH
102 select ARCH_INLINE_SPIN_UNLOCK_IRQ
103 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
104 select ARCH_INLINE_WRITE_LOCK
105 select ARCH_INLINE_WRITE_LOCK_BH
106 select ARCH_INLINE_WRITE_LOCK_IRQ
107 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
108 select ARCH_INLINE_WRITE_TRYLOCK
109 select ARCH_INLINE_WRITE_UNLOCK
110 select ARCH_INLINE_WRITE_UNLOCK_BH
111 select ARCH_INLINE_WRITE_UNLOCK_IRQ
112 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
113 select ARCH_STACKWALK
114 select ARCH_SUPPORTS_ATOMIC_RMW
115 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
116 select ARCH_SUPPORTS_HUGETLBFS
117 select ARCH_SUPPORTS_NUMA_BALANCING
118 select ARCH_USE_BUILTIN_BSWAP
119 select ARCH_USE_CMPXCHG_LOCKREF
120 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
121 select ARCH_WANTS_NO_INSTR
122 select ARCH_WANT_DEFAULT_BPF_JIT
123 select ARCH_WANT_IPC_PARSE_VERSION
124 select BUILDTIME_TABLE_SORT
125 select CLONE_BACKWARDS2
126 select DMA_OPS if PCI
127 select DYNAMIC_FTRACE if FUNCTION_TRACER
128 select GENERIC_ALLOCATOR
129 select GENERIC_CPU_AUTOPROBE
130 select GENERIC_CPU_VULNERABILITIES
132 select GENERIC_GETTIMEOFDAY
133 select GENERIC_PTDUMP
134 select GENERIC_SMP_IDLE_THREAD
135 select GENERIC_TIME_VSYSCALL
136 select GENERIC_VDSO_TIME_NS
137 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
138 select HAVE_ARCH_AUDITSYSCALL
139 select HAVE_ARCH_JUMP_LABEL
140 select HAVE_ARCH_JUMP_LABEL_RELATIVE
141 select HAVE_ARCH_KASAN
142 select HAVE_ARCH_KASAN_VMALLOC
143 select HAVE_ARCH_KCSAN
144 select HAVE_ARCH_KFENCE
145 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
146 select HAVE_ARCH_SECCOMP_FILTER
147 select HAVE_ARCH_SOFT_DIRTY
148 select HAVE_ARCH_TRACEHOOK
149 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
150 select HAVE_ARCH_VMAP_STACK
151 select HAVE_ASM_MODVERSIONS
152 select HAVE_CMPXCHG_DOUBLE
153 select HAVE_CMPXCHG_LOCAL
154 select HAVE_DEBUG_KMEMLEAK
155 select HAVE_DMA_CONTIGUOUS
156 select HAVE_DYNAMIC_FTRACE
157 select HAVE_DYNAMIC_FTRACE_WITH_ARGS
158 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
159 select HAVE_DYNAMIC_FTRACE_WITH_REGS
160 select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES
161 select HAVE_EFFICIENT_UNALIGNED_ACCESS
164 select HAVE_FTRACE_MCOUNT_RECORD
165 select HAVE_FUNCTION_ARG_ACCESS_API
166 select HAVE_FUNCTION_ERROR_INJECTION
167 select HAVE_FUNCTION_GRAPH_TRACER
168 select HAVE_FUNCTION_TRACER
169 select HAVE_GCC_PLUGINS
170 select HAVE_GENERIC_VDSO
171 select HAVE_IOREMAP_PROT if PCI
172 select HAVE_KERNEL_BZIP2
173 select HAVE_KERNEL_GZIP
174 select HAVE_KERNEL_LZ4
175 select HAVE_KERNEL_LZMA
176 select HAVE_KERNEL_LZO
177 select HAVE_KERNEL_UNCOMPRESSED
178 select HAVE_KERNEL_XZ
179 select HAVE_KERNEL_ZSTD
181 select HAVE_KPROBES_ON_FTRACE
182 select HAVE_KRETPROBES
184 select HAVE_LIVEPATCH
185 select HAVE_MEMBLOCK_PHYS_MAP
186 select HAVE_MOD_ARCH_SPECIFIC
188 select HAVE_NOP_MCOUNT
190 select HAVE_PERF_EVENTS
191 select HAVE_PERF_REGS
192 select HAVE_PERF_USER_STACK_DUMP
193 select HAVE_REGS_AND_STACK_ACCESS_API
194 select HAVE_RELIABLE_STACKTRACE
196 select HAVE_SAMPLE_FTRACE_DIRECT
197 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
198 select HAVE_SOFTIRQ_ON_OWN_STACK
199 select HAVE_SYSCALL_TRACEPOINTS
200 select HAVE_VIRT_CPU_ACCOUNTING
201 select HAVE_VIRT_CPU_ACCOUNTING_IDLE
202 select IOMMU_HELPER if PCI
203 select IOMMU_SUPPORT if PCI
204 select MMU_GATHER_NO_GATHER
205 select MMU_GATHER_RCU_TABLE_FREE
206 select MODULES_USE_ELF_RELA
207 select NEED_DMA_MAP_STATE if PCI
208 select NEED_SG_DMA_LENGTH if PCI
210 select OLD_SIGSUSPEND3
211 select PCI_DOMAINS if PCI
212 select PCI_MSI if PCI
213 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
216 select SYSCTL_EXCEPTION_TRACE
217 select THREAD_INFO_IN_TASK
218 select TRACE_IRQFLAGS_SUPPORT
220 select VIRT_CPU_ACCOUNTING
222 # Note: keep the above list sorted alphabetically
224 config SCHED_OMIT_FRAME_POINTER
227 config PGTABLE_LEVELS
231 source "kernel/livepatch/Kconfig"
233 menu "Processor type and features"
235 config HAVE_MARCH_Z10_FEATURES
238 config HAVE_MARCH_Z196_FEATURES
240 select HAVE_MARCH_Z10_FEATURES
242 config HAVE_MARCH_ZEC12_FEATURES
244 select HAVE_MARCH_Z196_FEATURES
246 config HAVE_MARCH_Z13_FEATURES
248 select HAVE_MARCH_ZEC12_FEATURES
250 config HAVE_MARCH_Z14_FEATURES
252 select HAVE_MARCH_Z13_FEATURES
254 config HAVE_MARCH_Z15_FEATURES
256 select HAVE_MARCH_Z14_FEATURES
259 prompt "Processor type"
263 bool "IBM System z10"
264 select HAVE_MARCH_Z10_FEATURES
265 depends on $(cc-option,-march=z10)
267 Select this to enable optimizations for IBM System z10 (2097 and 2098
268 series). This is the oldest machine generation currently supported.
271 bool "IBM zEnterprise 114 and 196"
272 select HAVE_MARCH_Z196_FEATURES
273 depends on $(cc-option,-march=z196)
275 Select this to enable optimizations for IBM zEnterprise 114 and 196
276 (2818 and 2817 series). The kernel will be slightly faster but will
277 not work on older machines.
280 bool "IBM zBC12 and zEC12"
281 select HAVE_MARCH_ZEC12_FEATURES
282 depends on $(cc-option,-march=zEC12)
284 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
285 2827 series). The kernel will be slightly faster but will not work on
289 bool "IBM z13s and z13"
290 select HAVE_MARCH_Z13_FEATURES
291 depends on $(cc-option,-march=z13)
293 Select this to enable optimizations for IBM z13s and z13 (2965 and
294 2964 series). The kernel will be slightly faster but will not work on
298 bool "IBM z14 ZR1 and z14"
299 select HAVE_MARCH_Z14_FEATURES
300 depends on $(cc-option,-march=z14)
302 Select this to enable optimizations for IBM z14 ZR1 and z14 (3907
303 and 3906 series). The kernel will be slightly faster but will not
304 work on older machines.
308 select HAVE_MARCH_Z15_FEATURES
309 depends on $(cc-option,-march=z15)
311 Select this to enable optimizations for IBM z15 (8562
312 and 8561 series). The kernel will be slightly faster but will not
313 work on older machines.
317 config MARCH_Z10_TUNE
318 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
320 config MARCH_Z196_TUNE
321 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
323 config MARCH_ZEC12_TUNE
324 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
326 config MARCH_Z13_TUNE
327 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
329 config MARCH_Z14_TUNE
330 def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
332 config MARCH_Z15_TUNE
333 def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
336 prompt "Tune code generation"
339 Cause the compiler to tune (-mtune) the generated code for a machine.
340 This will make the code run faster on the selected machine but
341 somewhat slower on other machines.
342 This option only changes how the compiler emits instructions, not the
343 selection of instructions itself, so the resulting kernel will run on
349 Tune the generated code for the target processor for which the kernel
353 bool "IBM System z10"
356 bool "IBM zEnterprise 114 and 196"
357 depends on $(cc-option,-mtune=z196)
360 bool "IBM zBC12 and zEC12"
361 depends on $(cc-option,-mtune=zEC12)
364 bool "IBM z13s and z13"
365 depends on $(cc-option,-mtune=z13)
368 bool "IBM z14 ZR1 and z14"
369 depends on $(cc-option,-mtune=z14)
373 depends on $(cc-option,-mtune=z15)
380 config COMMAND_LINE_SIZE
381 int "Maximum size of kernel command line"
385 This allows you to specify the maximum length of the kernel command
390 prompt "Kernel support for 31 bit emulation"
391 select ARCH_WANT_OLD_COMPAT_IPC
392 select COMPAT_OLD_SIGACTION
395 depends on !CC_IS_CLANG
397 Select this option if you want to enable your system kernel to
398 handle system-calls from ELF binaries for 31 bit ESA. This option
399 (and some other stuff like libraries and such) is needed for
400 executing 31 bit applications. It is safe to say "Y".
402 config SYSVIPC_COMPAT
403 def_bool y if COMPAT && SYSVIPC
409 int "Maximum number of CPUs (2-512)"
413 This allows you to specify the maximum number of CPUs which this
414 kernel will support. The maximum supported value is 512 and the
415 minimum value which makes sense is 2.
417 This is purely to save memory - each supported CPU adds
418 approximately sixteen kilobytes to the kernel image.
425 depends on SCHED_TOPOLOGY
430 This option adds NUMA support to the kernel.
449 config SCHED_TOPOLOGY
451 prompt "Topology scheduler support"
457 Topology scheduler support improves the CPU scheduler's decision
458 making when dealing with machines that have multi-threading,
459 multiple cores or multiple books.
461 source "kernel/Kconfig.hz"
468 bool "kexec file based system call"
472 depends on CRYPTO_SHA256
473 depends on CRYPTO_SHA256_S390
475 Enable the kexec file based system call. In contrast to the normal
476 kexec system call this system call takes file descriptors for the
477 kernel and initramfs as arguments.
479 config ARCH_HAS_KEXEC_PURGATORY
481 depends on KEXEC_FILE
484 bool "Verify kernel signature during kexec_file_load() syscall"
485 depends on KEXEC_FILE && MODULE_SIG_FORMAT
487 This option makes kernel signature verification mandatory for
488 the kexec_file_load() syscall.
490 In addition to that option, you need to enable signature
491 verification for the corresponding kernel image type being
492 loaded in order for this to work.
496 prompt "s390 architectural random number generation API"
498 Enable the s390 architectural random number generation API
499 to provide random data for all consumers within the Linux
502 When enabled the arch_random_* functions declared in linux/random.h
503 are implemented. The implementation is based on the s390 CPACF
504 instruction subfunction TRNG which provides a real true random
511 prompt "Enable modified branch prediction for the kernel by default"
513 If this option is selected the kernel will switch to a modified
514 branch prediction mode if the firmware interface is available.
515 The modified branch prediction mode improves the behaviour in
516 regard to speculative execution.
518 With the option enabled the kernel parameter "nobp=0" or "nospec"
519 can be used to run the kernel in the normal branch prediction mode.
521 With the option disabled the modified branch prediction mode is
522 enabled with the "nobp=1" kernel parameter.
528 depends on $(cc-option,-mindirect-branch=thunk)
529 prompt "Avoid speculative indirect branches in the kernel"
531 Compile the kernel with the expoline compiler options to guard
532 against kernel-to-user data leaks by avoiding speculative indirect
534 Requires a compiler with -mindirect-branch=thunk support for full
535 protection. The kernel may run slower.
539 config EXPOLINE_EXTERN
542 depends on CC_IS_GCC && GCC_VERSION >= 110200
543 depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
544 prompt "Generate expolines as extern functions."
546 This option is required for some tooling like kpatch. The kernel is
547 compiled with -mindirect-branch=thunk-extern and requires a newer
553 prompt "Expoline default"
555 default EXPOLINE_FULL
558 bool "spectre_v2=off"
561 bool "spectre_v2=auto"
569 bool "Build a relocatable kernel"
570 select MODULE_REL_CRCS if MODVERSIONS
573 This builds a kernel image that retains relocation information
574 so it can be loaded at an arbitrary address.
575 The kernel is linked as a position-independent executable (PIE)
576 and contains dynamic relocations which are processed early in the
578 The relocations make the kernel image about 15% larger (compressed
579 10%), but are discarded at runtime.
581 config RANDOMIZE_BASE
582 bool "Randomize the address of the kernel image (KASLR)"
583 depends on RELOCATABLE
586 In support of Kernel Address Space Layout Randomization (KASLR),
587 this randomizes the address at which the kernel image is loaded,
588 as a security feature that deters exploit attempts relying on
589 knowledge of the location of kernel internals.
595 config ARCH_SPARSEMEM_ENABLE
597 select SPARSEMEM_VMEMMAP_ENABLE
598 select SPARSEMEM_VMEMMAP
600 config ARCH_SPARSEMEM_DEFAULT
603 config MAX_PHYSMEM_BITS
604 int "Maximum size of supported physical memory in bits (42-53)"
608 This option specifies the maximum supported size of physical memory
609 in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
610 Increasing the number of bits also increases the kernel image size.
611 By default 46 bits (64TB) are supported.
615 depends on !VMAP_STACK
616 prompt "Detect kernel stack overflow"
618 This option enables the compiler option -mstack-guard and
619 -mstack-size if they are available. If the compiler supports them
620 it will emit additional code to each function prolog to trigger
621 an illegal operation if the kernel stack is about to overflow.
623 Say N if you are unsure.
626 int "Size of the guard area (128-1024)"
628 depends on CHECK_STACK
631 This allows you to specify the size of the guard area at the lower
632 end of the kernel stack. If the kernel stack points into the guard
633 area on function entry an illegal operation is triggered. The size
634 needs to be a power of 2. Please keep in mind that the size of an
635 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
636 The minimum size for the stack guard should be 256 for 31 bit and
645 prompt "QDIO support"
647 This driver provides the Queued Direct I/O base support for
650 To compile this driver as a module, choose M here: the
651 module will be called qdio.
657 config PCI_NR_FUNCTIONS
658 int "Maximum number of PCI functions (1-4096)"
662 This allows you to specify the maximum number of PCI functions which
663 this kernel will support.
672 prompt "Support for CHSC subchannels"
674 This driver allows usage of CHSC subchannels. A CHSC subchannel
675 is usually present on LPAR only.
676 The driver creates a device /dev/chsc, which may be used to
677 obtain I/O configuration information about the machine and
678 to issue asynchronous chsc commands (DANGEROUS).
679 You will usually only want to use this interface on a special
680 LPAR designated for system management.
682 To compile this driver as a module, choose M here: the
683 module will be called chsc_sch.
689 prompt "SCM bus driver"
691 Bus driver for Storage Class Memory.
695 prompt "Support for EADM subchannels"
698 This driver allows usage of EADM subchannels. EADM subchannels act
699 as a communication vehicle for SCM increments.
701 To compile this driver as a module, choose M here: the
702 module will be called eadm_sch.
706 prompt "Support for VFIO-CCW subchannels"
707 depends on S390_CCW_IOMMU && VFIO_MDEV
709 This driver allows usage of I/O subchannels via VFIO-CCW.
711 To compile this driver as a module, choose M here: the
712 module will be called vfio_ccw.
716 prompt "VFIO support for AP devices"
717 depends on S390_AP_IOMMU && VFIO_MDEV && KVM
720 This driver grants access to Adjunct Processor (AP) devices
721 via the VFIO mediated device interface.
723 To compile this driver as a module, choose M here: the module
724 will be called vfio_ap.
731 bool "kernel crash dumps"
734 Generate crash dump after being started by kexec.
735 Crash dump kernels are loaded in the main kernel with kexec-tools
736 into a specially reserved region and then later executed after
737 a crash by kdump/kexec.
738 Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
739 This option also enables s390 zfcpdump.
740 See also <file:Documentation/s390/zfcpdump.rst>
749 default (SMC || CCWGROUP)
751 menu "Virtualization"
753 config PROTECTED_VIRTUALIZATION_GUEST
755 prompt "Protected virtualization guest support"
756 select ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS
758 Select this option, if you want to be able to run this
759 kernel as a protected virtualization KVM guest.
760 Protected virtualization capable machines have a mini hypervisor
761 located at machine level (an ultravisor). With help of the
762 Ultravisor, KVM will be able to run "protected" VMs, special
763 VMs whose memory and management data are unavailable to KVM.
767 prompt "Pseudo page fault support"
769 Select this option, if you want to use PFAULT pseudo page fault
770 handling under VM. If running native or in LPAR, this option
771 has no effect. If your VM does not support PFAULT, PAGEEX
772 pseudo page fault handling will be used.
773 Note that VM 4.2 supports PFAULT but has a bug in its
774 implementation that causes some problems.
775 Everybody who wants to run Linux under VM != VM4.2 should select
780 prompt "Cooperative memory management"
782 Select this option, if you want to enable the kernel interface
783 to reduce the memory size of the system. This is accomplished
784 by allocating pages of memory and put them "on hold". This only
785 makes sense for a system running under VM where the unused pages
786 will be reused by VM for other guest systems. The interface
787 allows an external monitor to balance memory of many systems.
788 Everybody who wants to run Linux under VM should select this
793 prompt "IUCV special message interface to cooperative memory management"
794 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
796 Select this option to enable the special message interface to
797 the cooperative memory management.
801 prompt "Linux - VM Monitor Stream, base infrastructure"
802 depends on PROC_SYSCTL
804 This provides a kernel interface for creating and updating z/VM APPLDATA
805 monitor records. The monitor records are updated at certain time
806 intervals, once the timer is started.
807 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
808 i.e. enables or disables monitoring on the Linux side.
809 A custom interval value (in seconds) can be written to
810 /proc/appldata/interval.
812 Defaults are 60 seconds interval and timer off.
813 The /proc entries can also be read from, showing the current settings.
817 prompt "Monitor memory management statistics"
818 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
820 This provides memory management related data to the Linux - VM Monitor
821 Stream, like paging/swapping rate, memory utilisation, etc.
822 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
823 APPLDATA monitor record, i.e. enables or disables monitoring this record
827 The /proc entry can also be read from, showing the current settings.
829 This can also be compiled as a module, which will be called
834 prompt "Monitor OS statistics"
835 depends on APPLDATA_BASE
837 This provides OS related data to the Linux - VM Monitor Stream, like
838 CPU utilisation, etc.
839 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
840 APPLDATA monitor record, i.e. enables or disables monitoring this record
844 This can also be compiled as a module, which will be called
847 config APPLDATA_NET_SUM
849 prompt "Monitor overall network statistics"
850 depends on APPLDATA_BASE && NET
852 This provides network related data to the Linux - VM Monitor Stream,
853 currently there is only a total sum of network I/O statistics, no
855 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
856 APPLDATA monitor record, i.e. enables or disables monitoring this record
860 This can also be compiled as a module, which will be called
865 prompt "s390 hypervisor file system support"
866 select SYS_HYPERVISOR
868 This is a virtual file system intended to provide accounting
869 information in an s390 hypervisor environment.
871 source "arch/s390/kvm/Kconfig"
875 prompt "s390 support for virtio devices"
877 select VIRTUALIZATION
880 Enabling this option adds support for virtio based paravirtual device
883 Select this option if you want to run the kernel as a guest under
888 config S390_MODULES_SANITY_TEST_HELPERS
893 config S390_UNWIND_SELFTEST
896 default KUNIT_ALL_TESTS
897 prompt "Test unwind functions"
899 This option enables s390 specific stack unwinder testing kernel
900 module. This option is not useful for distributions or general
901 kernels, but only for kernel developers working on architecture code.
903 Say N if you are unsure.
905 config S390_KPROBES_SANITY_TEST
907 prompt "Enable s390 specific kprobes tests"
911 This option enables an s390 specific kprobes test module. This option
912 is not useful for distributions or general kernels, but only for kernel
913 developers working on architecture code.
915 Say N if you are unsure.
917 config S390_MODULES_SANITY_TEST
920 default KUNIT_ALL_TESTS
921 prompt "Enable s390 specific modules tests"
922 select S390_MODULES_SANITY_TEST_HELPERS
924 This option enables an s390 specific modules test. This option is
925 not useful for distributions or general kernels, but only for
926 kernel developers working on architecture code.
928 Say N if you are unsure.