ORACLE VM on SPARC and multipathing

I plan to use a small SPARC Netra T4-1 as a VM server with a primary domain and 2 guest domains. The primary has MPIO configured (4 paths to SAN storage). When a LUN is exported and added to a guest domain, does the single disk server defined on the primary handle the multipathing for the guest or are 2 service domains required? Only have 4 cores so don't want to add a secondary service domain. Using OVM 3.2 and Solaris 10 1/13.