arch/s390/kvm/kvm-s390.c

File Facts

System

Linux kernel

Corpus path

arch/s390/kvm/kvm-s390.c

Extension

.c

Size

166402 bytes

Lines

5956

Domain

Architecture Layer

Bucket

arch/s390

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/compiler.h
• linux/entry-virt.h
• linux/export.h
• linux/err.h
• linux/fs.h
• linux/hrtimer.h
• linux/init.h
• linux/kvm.h
• linux/kvm_host.h
• linux/mman.h
• linux/module.h
• linux/moduleparam.h
• linux/cpufeature.h
• linux/random.h
• linux/slab.h
• linux/timer.h
• linux/vmalloc.h
• linux/bitmap.h
• linux/sched/signal.h
• linux/string.h
• linux/pgtable.h
• linux/mmu_notifier.h
• asm/access-regs.h
• asm/asm-offsets.h
• asm/lowcore.h
• asm/machine.h
• asm/stp.h
• asm/gmap_helpers.h
• asm/nmi.h
• asm/isc.h
• asm/sclp.h
• asm/cpacf.h

Detected Declarations

• function kvm_clock_sync_scb
• function stop_machine
• function list_for_each_entry
• function allow_cpu_feat
• function plo_test_bit
• function pfcr_query
• function __sortl_query
• function __dfltcc_query
• function kvm_s390_cpu_feat_init
• function __kvm_s390_init
• function __kvm_s390_exit
• function kvm_s390_keyop
• function kvm_arch_dev_ioctl
• function kvm_vm_ioctl_check_extension
• function kvm_arch_sync_dirty_log
• function Get
• function icpt_operexc_on_all_vcpus
• function kvm_for_each_vcpu
• function kvm_vm_ioctl_enable_cap
• function kvm_s390_get_mem_control
• function kvm_s390_set_mem_control
• function scoped_guard
• function kvm_s390_vcpu_crypto_reset_all
• function kvm_for_each_vcpu
• function kvm_s390_vm_set_crypto
• function kvm_s390_vcpu_pci_setup
• function kvm_s390_vcpu_pci_enable_interp
• function kvm_for_each_vcpu
• function kvm_s390_sync_request_broadcast
• function kvm_s390_vm_start_migration
• function kvm_s390_vm_stop_migration
• function kvm_s390_vm_set_migration
• function kvm_s390_vm_get_migration
• function kvm_s390_set_tod_ext
• function kvm_s390_set_tod_high
• function kvm_s390_set_tod_low
• function kvm_s390_set_tod
• function kvm_s390_get_tod_clock
• function kvm_s390_get_tod_ext
• function kvm_s390_get_tod_high
• function kvm_s390_get_tod_low
• function kvm_s390_get_tod
• function kvm_s390_set_processor
• function kvm_s390_set_processor_feat
• function kvm_s390_set_processor_subfunc
• function kvm_s390_set_uv_feat
• function kvm_s390_set_cpu_model
• function kvm_s390_get_processor

Annotated Snippet

module_init(kvm_s390_init);
module_exit(kvm_s390_exit);

/*
 * Enable autoloading of the kvm module.
 * Note that we add the module alias here instead of virt/kvm/kvm_main.c
 * since x86 takes a different approach.
 */
#include <linux/miscdevice.h>
MODULE_ALIAS_MISCDEV(KVM_MINOR);
MODULE_ALIAS("devname:kvm");

Annotation

• Immediate include surface: `linux/compiler.h`, `linux/entry-virt.h`, `linux/export.h`, `linux/err.h`, `linux/fs.h`, `linux/hrtimer.h`, `linux/init.h`, `linux/kvm.h`.
• Detected declarations: `function kvm_clock_sync_scb`, `function stop_machine`, `function list_for_each_entry`, `function allow_cpu_feat`, `function plo_test_bit`, `function pfcr_query`, `function __sortl_query`, `function __dfltcc_query`, `function kvm_s390_cpu_feat_init`, `function __kvm_s390_init`.
• Atlas domain: Architecture Layer / arch/s390.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.