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f3cf800778
KVM: selftests: Fixes - provide memory model for IBM z196 and zEC12 - do not require 64GB of memory
404 lines
13 KiB
C
404 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* tools/testing/selftests/kvm/include/kvm_util.h
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*
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* Copyright (C) 2018, Google LLC.
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*/
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#ifndef SELFTEST_KVM_UTIL_H
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#define SELFTEST_KVM_UTIL_H
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#include "test_util.h"
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#include "asm/kvm.h"
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#include "linux/list.h"
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#include "linux/kvm.h"
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#include <sys/ioctl.h>
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#include "sparsebit.h"
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#define KVM_DEV_PATH "/dev/kvm"
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#define KVM_MAX_VCPUS 512
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/*
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* Callers of kvm_util only have an incomplete/opaque description of the
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* structure kvm_util is using to maintain the state of a VM.
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*/
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struct kvm_vm;
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typedef uint64_t vm_paddr_t; /* Virtual Machine (Guest) physical address */
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typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
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/* Minimum allocated guest virtual and physical addresses */
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#define KVM_UTIL_MIN_VADDR 0x2000
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#define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000
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#define DEFAULT_GUEST_PHY_PAGES 512
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#define DEFAULT_GUEST_STACK_VADDR_MIN 0xab6000
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#define DEFAULT_STACK_PGS 5
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enum vm_guest_mode {
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VM_MODE_P52V48_4K,
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VM_MODE_P52V48_64K,
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VM_MODE_P48V48_4K,
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VM_MODE_P48V48_64K,
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VM_MODE_P40V48_4K,
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VM_MODE_P40V48_64K,
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VM_MODE_PXXV48_4K, /* For 48bits VA but ANY bits PA */
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VM_MODE_P47V64_4K,
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VM_MODE_P44V64_4K,
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NUM_VM_MODES,
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};
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#if defined(__aarch64__)
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#define VM_MODE_DEFAULT VM_MODE_P40V48_4K
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#define MIN_PAGE_SHIFT 12U
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#define ptes_per_page(page_size) ((page_size) / 8)
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#elif defined(__x86_64__)
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#define VM_MODE_DEFAULT VM_MODE_PXXV48_4K
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#define MIN_PAGE_SHIFT 12U
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#define ptes_per_page(page_size) ((page_size) / 8)
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#elif defined(__s390x__)
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#define VM_MODE_DEFAULT VM_MODE_P44V64_4K
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#define MIN_PAGE_SHIFT 12U
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#define ptes_per_page(page_size) ((page_size) / 16)
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#endif
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#define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
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#define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE)
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struct vm_guest_mode_params {
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unsigned int pa_bits;
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unsigned int va_bits;
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unsigned int page_size;
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unsigned int page_shift;
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};
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extern const struct vm_guest_mode_params vm_guest_mode_params[];
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int open_kvm_dev_path_or_exit(void);
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int kvm_check_cap(long cap);
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int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
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int vcpu_enable_cap(struct kvm_vm *vm, uint32_t vcpu_id,
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struct kvm_enable_cap *cap);
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void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size);
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const char *vm_guest_mode_string(uint32_t i);
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struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
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void kvm_vm_free(struct kvm_vm *vmp);
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void kvm_vm_restart(struct kvm_vm *vmp, int perm);
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void kvm_vm_release(struct kvm_vm *vmp);
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void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log);
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void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
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uint64_t first_page, uint32_t num_pages);
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uint32_t kvm_vm_reset_dirty_ring(struct kvm_vm *vm);
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int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva,
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size_t len);
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void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename);
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void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent);
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/*
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* VM VCPU Dump
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*
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* Input Args:
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* stream - Output FILE stream
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* vm - Virtual Machine
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* vcpuid - VCPU ID
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* indent - Left margin indent amount
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*
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* Output Args: None
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*
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* Return: None
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*
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* Dumps the current state of the VCPU specified by @vcpuid, within the VM
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* given by @vm, to the FILE stream given by @stream.
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*/
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void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid,
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uint8_t indent);
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void vm_create_irqchip(struct kvm_vm *vm);
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void vm_userspace_mem_region_add(struct kvm_vm *vm,
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enum vm_mem_backing_src_type src_type,
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uint64_t guest_paddr, uint32_t slot, uint64_t npages,
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uint32_t flags);
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void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
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void *arg);
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int _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
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void *arg);
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void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
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int _vm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg);
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void kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
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int _kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
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void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags);
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void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa);
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void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot);
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void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid);
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vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min);
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vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages);
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vm_vaddr_t vm_vaddr_alloc_page(struct kvm_vm *vm);
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void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
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unsigned int npages);
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void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa);
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void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva);
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vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva);
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void *addr_gpa2alias(struct kvm_vm *vm, vm_paddr_t gpa);
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/*
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* Address Guest Virtual to Guest Physical
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*
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* Input Args:
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* vm - Virtual Machine
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* gva - VM virtual address
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*
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* Output Args: None
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*
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* Return:
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* Equivalent VM physical address
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*
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* Returns the VM physical address of the translated VM virtual
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* address given by @gva.
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*/
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vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva);
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struct kvm_run *vcpu_state(struct kvm_vm *vm, uint32_t vcpuid);
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void vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
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int _vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
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int vcpu_get_fd(struct kvm_vm *vm, uint32_t vcpuid);
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void vcpu_run_complete_io(struct kvm_vm *vm, uint32_t vcpuid);
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void vcpu_set_guest_debug(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_guest_debug *debug);
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void vcpu_set_mp_state(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_mp_state *mp_state);
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struct kvm_reg_list *vcpu_get_reg_list(struct kvm_vm *vm, uint32_t vcpuid);
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void vcpu_regs_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
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void vcpu_regs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
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/*
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* VM VCPU Args Set
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*
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* Input Args:
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* vm - Virtual Machine
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* vcpuid - VCPU ID
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* num - number of arguments
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* ... - arguments, each of type uint64_t
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*
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* Output Args: None
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*
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* Return: None
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*
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* Sets the first @num function input registers of the VCPU with @vcpuid,
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* per the C calling convention of the architecture, to the values given
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* as variable args. Each of the variable args is expected to be of type
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* uint64_t. The maximum @num can be is specific to the architecture.
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*/
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void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...);
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void vcpu_sregs_get(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_sregs *sregs);
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void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_sregs *sregs);
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int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_sregs *sregs);
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void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_fpu *fpu);
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void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_fpu *fpu);
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void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
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void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
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#ifdef __KVM_HAVE_VCPU_EVENTS
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void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_vcpu_events *events);
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void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_vcpu_events *events);
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#endif
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#ifdef __x86_64__
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void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_nested_state *state);
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int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
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struct kvm_nested_state *state, bool ignore_error);
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#endif
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void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid);
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int _kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr);
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int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr);
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int _kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test, int *fd);
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int kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test);
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int _kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
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void *val, bool write);
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int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
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void *val, bool write);
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const char *exit_reason_str(unsigned int exit_reason);
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void virt_pgd_alloc(struct kvm_vm *vm);
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/*
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* VM Virtual Page Map
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*
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* Input Args:
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* vm - Virtual Machine
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* vaddr - VM Virtual Address
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* paddr - VM Physical Address
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* memslot - Memory region slot for new virtual translation tables
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*
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* Output Args: None
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*
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* Return: None
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*
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* Within @vm, creates a virtual translation for the page starting
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* at @vaddr to the page starting at @paddr.
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*/
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void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr);
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vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
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uint32_t memslot);
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vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
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vm_paddr_t paddr_min, uint32_t memslot);
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vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm);
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/*
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* Create a VM with reasonable defaults
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*
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* Input Args:
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* vcpuid - The id of the single VCPU to add to the VM.
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* extra_mem_pages - The number of extra pages to add (this will
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* decide how much extra space we will need to
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* setup the page tables using memslot 0)
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* guest_code - The vCPU's entry point
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*
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* Output Args: None
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*
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* Return:
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* Pointer to opaque structure that describes the created VM.
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*/
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struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
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void *guest_code);
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/* Same as vm_create_default, but can be used for more than one vcpu */
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struct kvm_vm *vm_create_default_with_vcpus(uint32_t nr_vcpus, uint64_t extra_mem_pages,
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uint32_t num_percpu_pages, void *guest_code,
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uint32_t vcpuids[]);
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/* Like vm_create_default_with_vcpus, but accepts mode and slot0 memory as a parameter */
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struct kvm_vm *vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
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uint64_t slot0_mem_pages, uint64_t extra_mem_pages,
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uint32_t num_percpu_pages, void *guest_code,
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uint32_t vcpuids[]);
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/*
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* Adds a vCPU with reasonable defaults (e.g. a stack)
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*
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* Input Args:
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* vm - Virtual Machine
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* vcpuid - The id of the VCPU to add to the VM.
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* guest_code - The vCPU's entry point
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*/
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void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
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bool vm_is_unrestricted_guest(struct kvm_vm *vm);
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unsigned int vm_get_page_size(struct kvm_vm *vm);
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unsigned int vm_get_page_shift(struct kvm_vm *vm);
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uint64_t vm_get_max_gfn(struct kvm_vm *vm);
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int vm_get_fd(struct kvm_vm *vm);
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unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size);
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unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned int num_guest_pages);
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unsigned int vm_num_guest_pages(enum vm_guest_mode mode, unsigned int num_host_pages);
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static inline unsigned int
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vm_adjust_num_guest_pages(enum vm_guest_mode mode, unsigned int num_guest_pages)
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{
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unsigned int n;
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n = vm_num_guest_pages(mode, vm_num_host_pages(mode, num_guest_pages));
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#ifdef __s390x__
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/* s390 requires 1M aligned guest sizes */
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n = (n + 255) & ~255;
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#endif
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return n;
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}
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struct kvm_userspace_memory_region *
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kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
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uint64_t end);
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struct kvm_dirty_log *
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allocate_kvm_dirty_log(struct kvm_userspace_memory_region *region);
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int vm_create_device(struct kvm_vm *vm, struct kvm_create_device *cd);
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#define sync_global_to_guest(vm, g) ({ \
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typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g)); \
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memcpy(_p, &(g), sizeof(g)); \
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})
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#define sync_global_from_guest(vm, g) ({ \
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typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g)); \
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memcpy(&(g), _p, sizeof(g)); \
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})
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void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid);
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/* Common ucalls */
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enum {
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UCALL_NONE,
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UCALL_SYNC,
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UCALL_ABORT,
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UCALL_DONE,
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UCALL_UNHANDLED,
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};
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#define UCALL_MAX_ARGS 6
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struct ucall {
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uint64_t cmd;
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uint64_t args[UCALL_MAX_ARGS];
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};
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void ucall_init(struct kvm_vm *vm, void *arg);
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void ucall_uninit(struct kvm_vm *vm);
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void ucall(uint64_t cmd, int nargs, ...);
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uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc);
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#define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \
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ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
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#define GUEST_SYNC(stage) ucall(UCALL_SYNC, 2, "hello", stage)
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#define GUEST_DONE() ucall(UCALL_DONE, 0)
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#define __GUEST_ASSERT(_condition, _condstr, _nargs, _args...) do { \
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if (!(_condition)) \
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ucall(UCALL_ABORT, 2 + _nargs, \
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"Failed guest assert: " \
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_condstr, __LINE__, _args); \
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} while (0)
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#define GUEST_ASSERT(_condition) \
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__GUEST_ASSERT(_condition, #_condition, 0, 0)
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#define GUEST_ASSERT_1(_condition, arg1) \
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__GUEST_ASSERT(_condition, #_condition, 1, (arg1))
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#define GUEST_ASSERT_2(_condition, arg1, arg2) \
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__GUEST_ASSERT(_condition, #_condition, 2, (arg1), (arg2))
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#define GUEST_ASSERT_3(_condition, arg1, arg2, arg3) \
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__GUEST_ASSERT(_condition, #_condition, 3, (arg1), (arg2), (arg3))
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#define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \
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__GUEST_ASSERT(_condition, #_condition, 4, (arg1), (arg2), (arg3), (arg4))
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#define GUEST_ASSERT_EQ(a, b) __GUEST_ASSERT((a) == (b), #a " == " #b, 2, a, b)
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int vm_get_stats_fd(struct kvm_vm *vm);
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int vcpu_get_stats_fd(struct kvm_vm *vm, uint32_t vcpuid);
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#endif /* SELFTEST_KVM_UTIL_H */
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