Using the OEM GC Provisioning and Automated Patching Pack, you are able to provision a complete Oracle RAC Cluster, including the Grid Infrastructure and creation of an ASM Instance and a RAC Database.
In this paper I show an example of how I was able to do the provisioning of Grd Infrastructure and Oracle RAC on a 2 node OracleVM Cluster.
Oracle Grid Infrastructure – RAC Provisioning – Using OEM GC 11.1