OpenBSD 8.0 quadruples the amd64 kernel address space to 512G

OpenBSD 8.0, the project's 61st release, lifts the amd64 kernel virtual address space from 4G to 512G, which lets inteldrm map more than 4GB of VRAM and brings Intel Arc A-Series support. arm64 gains hibernate, riscv64 adds vector and interrupt-architecture support, and vmm now runs up to 64 VCPUs per guest. The release also retires the loongson architecture and ships a long list of security and driver fixes.