arch/arm64/kvm/arm.c

File Facts

System

Linux kernel

Corpus path

arch/arm64/kvm/arm.c

Extension

.c

Size

77549 bytes

Lines

3167

Domain

Architecture Layer

Bucket

arch/arm64

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/arm-smccc.h
• linux/bug.h
• linux/cpu_pm.h
• linux/errno.h
• linux/err.h
• linux/kvm_host.h
• linux/list.h
• linux/module.h
• linux/vmalloc.h
• linux/fs.h
• linux/mman.h
• linux/sched.h
• linux/kvm.h
• linux/kvm_irqfd.h
• linux/irqbypass.h
• linux/sched/stat.h
• linux/psci.h
• trace/events/kvm.h
• trace_arm.h
• hyp_trace.h
• linux/uaccess.h
• asm/ptrace.h
• asm/mman.h
• asm/tlbflush.h
• asm/cacheflush.h
• asm/cpufeature.h
• asm/virt.h
• asm/kvm_arm.h
• asm/kvm_asm.h
• asm/kvm_emulate.h
• asm/kvm_hyp.h
• asm/kvm_mmu.h

Detected Declarations

• struct kvm_ioctl_cap_map
• enum kvm_wfx_trap_policy
• function kvm_get_cap_for_kvm_ioctl
• function is_kvm_arm_initialised
• function kvm_arch_vcpu_should_kick
• function kvm_vm_ioctl_enable_cap
• function kvm_arm_default_max_vcpus
• function kvm_arch_init_vm
• function kvm_arch_vcpu_fault
• function kvm_arch_create_vm_debugfs
• function kvm_destroy_mpidr_data
• function kvm_arch_destroy_vm
• function kvm_has_full_ptr_auth
• function kvm_vm_ioctl_check_extension
• function kvm_arch_dev_ioctl
• function kvm_arch_vcpu_precreate
• function kvm_arch_vcpu_create
• function kvm_arch_vcpu_postcreate
• function kvm_arch_vcpu_blocking
• function kvm_vcpu_should_clear_twi
• function kvm_vcpu_should_clear_twe
• function kvm_arch_vcpu_load
• function kvm_arch_vcpu_put
• function __kvm_arm_vcpu_power_off
• function kvm_arm_vcpu_power_off
• function kvm_arm_vcpu_stopped
• function kvm_arm_vcpu_suspend
• function kvm_arm_vcpu_suspended
• function kvm_arch_vcpu_ioctl_get_mpstate
• function kvm_arch_vcpu_ioctl_set_mpstate
• function kvm_arch_vcpu_runnable
• function kvm_arch_vcpu_in_kernel
• function kvm_arch_vcpu_get_ip
• function kvm_init_mpidr_data
• function kvm_for_each_vcpu
• function kvm_for_each_vcpu
• function kvm_arch_vcpu_run_pid_change
• function kvm_arch_intc_initialized
• function kvm_arm_halt_guest
• function kvm_arm_resume_guest
• function kvm_for_each_vcpu
• function kvm_vcpu_sleep
• function kvm_vcpu_wfi
• function kvm_vcpu_suspend
• function check_vcpu_requests
• function vcpu_mode_is_bad_32bit
• function kvm_irq_update_run
• function kvm_vcpu_exit_request

Annotated Snippet

module_init(kvm_arm_init);

Annotation

• Immediate include surface: `linux/arm-smccc.h`, `linux/bug.h`, `linux/cpu_pm.h`, `linux/errno.h`, `linux/err.h`, `linux/kvm_host.h`, `linux/list.h`, `linux/module.h`.
• Detected declarations: `struct kvm_ioctl_cap_map`, `enum kvm_wfx_trap_policy`, `function kvm_get_cap_for_kvm_ioctl`, `function is_kvm_arm_initialised`, `function kvm_arch_vcpu_should_kick`, `function kvm_vm_ioctl_enable_cap`, `function kvm_arm_default_max_vcpus`, `function kvm_arch_init_vm`, `function kvm_arch_vcpu_fault`, `function kvm_arch_create_vm_debugfs`.
• Atlas domain: Architecture Layer / arch/arm64.
• 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.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.