A processor includes cores and instructions executable by at least one of the plurality of cores as a virtual machine monitor (VMM). To configure resources for a virtual machine (VM), the VMM is to: group the cores into cluster(s), where a subset of the cores is to execute the VM; create, within a buffer in memory, a data structure to store, for the subset, one or more entries, each entry including a cluster identifier and a bitmap. The bitmap identifies cores of the subset within a cluster corresponding to the cluster identifier. The VMM is further to write, to a virtual machine control structure (VMCS): a pointer to the data structure, wherein the pointer includes a physical address of the memory; and a number of the one or more entries in the data structure; and set, within the VMCS, a local interrupt controller pass-through field.