diff --git a/man/systemd-detect-virt.xml b/man/systemd-detect-virt.xml index 996c2fa256e..dc10b4dd430 100644 --- a/man/systemd-detect-virt.xml +++ b/man/systemd-detect-virt.xml @@ -91,12 +91,12 @@ VM qemu - QEMU software virtualization + QEMU software virtualization, without KVM kvm - Linux KVM kernel virtual machine + Linux KVM kernel virtual machine, from within QEMU diff --git a/src/basic/virt.c b/src/basic/virt.c index 03ce71a7288..0fbbdea6029 100644 --- a/src/basic/virt.c +++ b/src/basic/virt.c @@ -316,25 +316,31 @@ static int detect_vm_zvm(void) { /* 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)