Justin Hibbits
1ae2586676
This works on older arm64 platforms, but may not work with arm64 devices using GICv3, due to a quirk in the GICv3, where some registers are write-once. Most of the kexec reboot work on arm64 can be done entirely in C code, by disabling the MMU, as the kernel is carved out of the vm_phys_segs array, so cannot be overwritten. Reviewed by: andrew Sponsored by: Juniper Networks, Inc. Differential Revision: https://reviews.freebsd.org/D51621