diff options
| -rw-r--r-- | man/systemd-detect-virt.xml | 4 | ||||
| -rw-r--r-- | src/basic/virt.c | 20 |
2 files changed, 15 insertions, 9 deletions
diff --git a/man/systemd-detect-virt.xml b/man/systemd-detect-virt.xml index 996c2fa256..dc10b4dd43 100644 --- a/man/systemd-detect-virt.xml +++ b/man/systemd-detect-virt.xml @@ -91,12 +91,12 @@ <row> <entry valign="top" morerows="10">VM</entry> <entry><varname>qemu</varname></entry> - <entry>QEMU software virtualization</entry> + <entry>QEMU software virtualization, without KVM</entry> </row> <row> <entry><varname>kvm</varname></entry> - <entry>Linux KVM kernel virtual machine</entry> + <entry>Linux KVM kernel virtual machine, from within QEMU</entry> </row> <row> diff --git a/src/basic/virt.c b/src/basic/virt.c index 03ce71a728..0fbbdea602 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) |