b934fc7468
This set of changes make it possible to run FreeBSD for PowerPC64/pseries, under QEMU/KVM, without requiring the host to make hugepages available to the guest. While there was already this possibility, by means of setting hw_direct_map to 0, on PowerPC64 there were a couple of issues/wrong assumptions that prevented this from working, before this changelist. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D20522