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| author | Daniel P. Berrange <berrange@redhat.com> | 2017-05-09 14:27:36 +0100 |
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| committer | Eduardo Habkost <ehabkost@redhat.com> | 2017-07-17 15:41:30 -0300 |
| commit | 1ce36bfe6424243082d3d7c2330e1a0a4ff72a43 (patch) | |
| tree | c58746657db8a709970e935c9fcaa9b43c5ba903 /qapi/string-output-visitor.c | |
| parent | 39736e18cda64c501caab00d93ebfd8b4cf6b36e (diff) | |
| download | focaccia-qemu-1ce36bfe6424243082d3d7c2330e1a0a4ff72a43.tar.gz focaccia-qemu-1ce36bfe6424243082d3d7c2330e1a0a4ff72a43.zip | |
i386: expose "TCGTCGTCGTCG" in the 0x40000000 CPUID leaf
Currently when running KVM, we expose "KVMKVMKVM\0\0\0" in the 0x40000000 CPUID leaf. Other hypervisors (VMWare, HyperV, Xen, BHyve) all do the same thing, which leaves TCG as the odd one out. The CPUID signature is used by software to detect which virtual environment they are running in and (potentially) change behaviour in certain ways. For example, systemd supports a ConditionVirtualization= setting in unit files. The virt-what command can also report the virt type it is running on Currently both these apps have to resort to custom hacks like looking for 'fw-cfg' entry in the /proc/device-tree file to identify TCG. This change thus proposes a signature "TCGTCGTCGTCG" to be reported when running under TCG. To hide this, the -cpu option tcg-cpuid=off can be used. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20170509132736.10071-3-berrange@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'qapi/string-output-visitor.c')
0 files changed, 0 insertions, 0 deletions