8a68ae80f6
Expose the special kernel LAPIC, IOAPIC, and HPET devices to userspace for use in, e.g., fallback instruction emulation (when userspace has a newer instruction decode/emulation layer than the kernel vmm(4)). Plumb the ioctl through libvmmapi and register the memory ranges in bhyve(8). Reviewed by: grehan Differential Revision: https://reviews.freebsd.org/D24525