On 17/11/2014 12:31, Tiejun Chen wrote: > In non-ept 64-bit of PAE case maxphyaddr may be 52bit as well, There is no such thing as 64-bit PAE. On 32-bit PAE hosts, PTEs have bit 62 reserved, as in your patch: > + /* Magic bits are always reserved for 32bit host. */ > + mask |= 0x3ull << 62; so there is no need to disable the MMIO page fault. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html