Kconfig - OpenGrok cross reference for /linux-6.15/arch/s390/Kconfig

1 # SPDX-License-Identifier: GPL-2.0
62 	  Clang versions before 19.1.0 do not support A,
306 menu "Processor type and features"
340 	prompt "Processor type"
346 	depends on $(cc-option,-march=z10)
354 	depends on $(cc-option,-march=z196)
363 	depends on $(cc-option,-march=zEC12)
372 	depends on $(cc-option,-march=z13)
381 	depends on $(cc-option,-march=z14)
390 	depends on $(cc-option,-march=z15)
399 	depends on $(cc-option,-march=z16)
407 	depends on $(cc-option,-march=z17)
442 	  Cause the compiler to tune (-mtune) the generated code for a machine.
452 	  Tune the generated code for the target processor for which the kernel
460 	depends on $(cc-option,-mtune=z196)
464 	depends on $(cc-option,-mtune=zEC12)
468 	depends on $(cc-option,-mtune=z13)
472 	depends on $(cc-option,-mtune=z14)
476 	depends on $(cc-option,-mtune=z15)
480 	depends on $(cc-option,-mtune=z16)
484 	depends on $(cc-option,-mtune=z17)
509 	  handle system-calls from ELF binaries for 31 bit ESA.  This option
519 	int "Maximum number of CPUs (2-512)"
527 	  This is purely to save memory - each supported CPU adds
560 	  making when dealing with machines that have multi-threading,
590 	  Enable this option if you want to access user-provided secure boot
600 	  If this option is selected the kernel will switch to a modified
615 	depends on $(cc-option,-mindirect-branch=thunk)
619 	  against kernel-to-user data leaks by avoiding speculative indirect
621 	  Requires a compiler with -mindirect-branch=thunk support for full
628 		 $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC))
633 	  -mindirect-branch=thunk-extern, which requires a newer compiler.
655 	  This builds a kernel image that retains relocation information
668 	  as a security feature that deters exploit attempts relying on
695 	  Ultravisor imposes a virtual address limit. If the value of this
716 	int "Maximum size of supported physical memory in bits (42-53)"
736 	  To compile this driver as a module, choose M here: the
744 	int "Maximum number of PCI functions (1-4096)"
760 	  This driver allows usage of CHSC subchannels. A CHSC subchannel
762 	  The driver creates a device /dev/chsc, which may be used to
765 	  You will usually only want to use this interface on a special
768 	  To compile this driver as a module, choose M here: the
785 	  as a communication vehicle for SCM increments.
787 	  To compile this driver as a module, choose M here: the
794 	  This driver allows usage to Adjunct Processor (AP) devices via
798 	  To compile this driver as a module, choose M here: the
805 	prompt "Enable debug features for Adjunct Processor (ap) devices"
809 	  Processor (ap) devices.
819 	prompt "Support for VFIO-CCW subchannels"
823 	  This driver allows usage of I/O subchannels via VFIO-CCW.
825 	  To compile this driver as a module, choose M here: the
836 	  This driver grants access to Adjunct Processor (AP) devices
839 	  To compile this driver as a module, choose M here: the module
861 	  Note that VM 4.2 supports PFAULT but has a bug in its
873 	  makes sense for a system running under VM where the unused pages
889 	prompt "Linux - VM Monitor Stream, base infrastructure"
892 	  This provides a kernel interface for creating and updating z/VM APPLDATA
896 	  i.e. enables or disables monitoring on the Linux side.
897 	  A custom interval value (in seconds) can be written to
908 	  This provides memory management related data to the Linux - VM Monitor
910 	  Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
912 	  on the z/VM side.
917 	  This can also be compiled as a module, which will be called
925 	  This provides OS related data to the Linux - VM Monitor Stream, like
927 	  Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
929 	  on the z/VM side.
932 	  This can also be compiled as a module, which will be called
940 	  This provides network related data to the Linux - VM Monitor Stream,
941 	  currently there is only a total sum of network I/O statistics, no
942 	  per-interface data.
943 	  Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
945 	  on the z/VM side.
948 	  This can also be compiled as a module, which will be called
964 	  This is a virtual file system intended to provide accounting
982 	  Select this option if you want to run the kernel as a guest under