> >A number of qemu driver backends (such as rtl8139) call the function >cpu_physical_memory_rw to read/write guest memory. The target guest >memory address is often supplied by the guest. This opens up the >possibility of a guest giving an address which happens to be an MMIO >address which can potentially lead to infinite recursion involving >cpu_physical_memory_rw. > >Since these driver backends really only need to access system memory, >we could simply provide a new access interface that does not allow >MMIO addresses. > >Any comments on this problem? >
The interface called paddr_is_ram should help. -Xin
