Hi, I had an idea of mapping the full 32-bit target virtual address space to a 4GB area on 64-bit hosts. Then the loads and stores to normal RAM (except page tables, code_mem_write etc) could be made much faster, falling back to softmmu for other pages. The idea has come up before, for example in this Fabrice's message: http://article.gmane.org/gmane.comp.emulators.qemu/685
But I'm not sure if this would be worth the effort, the speedup would depend on the frequency of the loads/stores and also translation time vs. translated code execution times. Does anyone have good statistics on those?
