Is that possible to implement a single machine with heterogeneous architecture.

Hello everyone, Is that possible to install multiple CPUs which have different architecture on a single machine? For example, on a single machine with two different cpu sockets for X86 and MIPS cpu respectively, and these two cpus are inter-connected with some sorts of bus (PCI or other advanced buses). If it is possible, Is this machine still SMP? What will lscpu (or cat /proc/cpuinfo) dump? Thx!