/* Returns a short identifier for the various VM implementations */
int detect_vm(void) {
static thread_local int cached_found = _VIRTUALIZATION_INVALID;
- int r;
+ int r, cpuid;
if (cached_found >= 0)
return cached_found;
/* We have to use the correct order here:
- * Some virtualization technologies do use KVM hypervisor but are
- * expected to be detected as something else. So detect DMI first.
*
- * An example is Virtualbox since version 5.0, which uses KVM backend.
- * Detection via DMI works corretly, the CPU ID would find KVM
- * only. */
+ * -> First try to detect qemu/kvm and return 'kvm'.
+ * -> Some virtualization technologies do use KVM hypervisor but are
+ * expected to be detected as something else. Virtualbox since
+ * version 5.0 is an example. So detect DMI next.
+ * -> Get infos from CPUID third. */
+
+ cpuid = detect_vm_cpuid();
r = detect_vm_dmi();
+
+ if (r == VIRTUALIZATION_QEMU && cpuid == VIRTUALIZATION_KVM)
+ return cpuid;
+
if (r < 0)
return r;
if (r != VIRTUALIZATION_NONE)
goto finish;
- r = detect_vm_cpuid();
+ r = cpuid;
if (r < 0)
return r;
if (r != VIRTUALIZATION_NONE)