Function kvm_init

tinyemu/x86_machine.c:1660–1752

}

static void kvm_init(PCMachine *s)
{
    int ret, i;
    struct sigaction act;
    struct kvm_pit_config pit_config;
    uint64_t base_addr;
    
    s->kvm_enabled = FALSE;
    s->kvm_fd = open("/dev/kvm", O_RDWR);
    if (s->kvm_fd < 0) {
        fprintf(stderr, "KVM not available\n");
        return;
    }
    ret = ioctl(s->kvm_fd, KVM_GET_API_VERSION, 0);
    if (ret < 0) {
        perror("KVM_GET_API_VERSION");
        exit(1);
    }
    if (ret != 12) {
        fprintf(stderr, "Unsupported KVM version\n");
        close(s->kvm_fd);
        s->kvm_fd = -1;
        return;
    }
    s->vm_fd = ioctl(s->kvm_fd, KVM_CREATE_VM, 0);
    if (s->vm_fd < 0) {
        perror("KVM_CREATE_VM");
        exit(1);
    }

    /* just before the BIOS */
    base_addr = 0xfffbc000;
    if (ioctl(s->vm_fd, KVM_SET_IDENTITY_MAP_ADDR, &base_addr) < 0) {
        perror("KVM_SET_IDENTITY_MAP_ADDR");
        exit(1);
    }
    
    if (ioctl(s->vm_fd, KVM_SET_TSS_ADDR, (long)(base_addr + 0x1000)) < 0) {
        perror("KVM_SET_TSS_ADDR");
        exit(1);
    }
    
    if (ioctl(s->vm_fd, KVM_CREATE_IRQCHIP, 0) < 0) {
        perror("KVM_CREATE_IRQCHIP");
        exit(1);
    }

    memset(&pit_config, 0, sizeof(pit_config));
    pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
    if (ioctl(s->vm_fd, KVM_CREATE_PIT2, &pit_config)) {
        perror("KVM_CREATE_PIT2");
        exit(1);
    }
    
    s->vcpu_fd = ioctl(s->vm_fd, KVM_CREATE_VCPU, 0);
    if (s->vcpu_fd < 0) {
        perror("KVM_CREATE_VCPU");
        exit(1);