kvm-structs.h

#ifndef KVM_STRUCTS
#define KVM_STRUCTS

#include <stddef.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <string.h>
#include <unistd.h>

#define MAX_VCPUFD 20
#define KVM_DEVICE "/dev/kvm"

struct kvm_ctx {
    struct kvm_userspace_memory_region guest_memory_region;
    void * mmio_region_addr;
    size_t mmio_size;
    size_t um_size;
    int cpufd[MAX_VCPUFD];
    int kvmfd;
    int vmfd;
};

#define CR4_PAE (1U << 5)
#define EFER_LME (1U << 8)
#define EFER_LMA (1U << 10)

/* CR0 bits */
#define CR0_PE (1U << 0)
#define CR0_MP (1U << 1)
#define CR0_ET (1U << 4)
#define CR0_NE (1U << 5)
#define CR0_WP (1U << 16)
#define CR0_AM (1U << 18)
#define CR0_PG (1U << 31)

/* Page Table Flags */
#define PTE_PRESENT (1ULL << 0)
#define PTE_RW      (1ULL << 1)
#define PTE_USER    (1ULL << 2)
#define PTE_PAGE_SIZE 0x1000

#endif