| 21 | } |
| 22 | |
| 23 | int GetKvmFd() { |
| 24 | std::lock_guard<std::mutex> lock(KvmFdMutex()); |
| 25 | if (g_kvm_fd >= 0) return g_kvm_fd; |
| 26 | |
| 27 | int fd = ::open("/dev/kvm", O_RDWR | O_CLOEXEC); |
| 28 | if (fd < 0) { |
| 29 | LOG_ERROR("kvm: open(/dev/kvm) failed: %s", strerror(errno)); |
| 30 | return -1; |
| 31 | } |
| 32 | |
| 33 | int api = ::ioctl(fd, KVM_GET_API_VERSION, 0); |
| 34 | if (api != KVM_API_VERSION) { |
| 35 | LOG_ERROR("kvm: KVM_GET_API_VERSION=%d, expected %d", api, KVM_API_VERSION); |
| 36 | ::close(fd); |
| 37 | return -1; |
| 38 | } |
| 39 | |
| 40 | g_kvm_fd = fd; |
| 41 | return g_kvm_fd; |
| 42 | } |
| 43 | |
| 44 | bool IsHypervisorPresent() { |
| 45 | if (::access("/dev/kvm", R_OK | W_OK) != 0) { |
no outgoing calls
no test coverage detected