040000 tree 5e5b4a6be0d6fa5867290fdd0c9fb15d2edaf838	kvm
040000 tree 0967c642039673943251b455441b0fe3620c77f5	ovm
040000 tree c28a5ca1351e7e4209f2c1e9ff7509a285e4196c	simulator
040000 tree 623174572c4248edbea9bc25d7224f2414bca557	vmware
040000 tree 95dbcd30dcde18501ecd4f86a946460fe56fd61c	xen