Tag
vm-exit
- Aug 7, 2026 Anatomy of a VM Exit: State Save, Exit Qualification, and Where the Cycles Go What the processor writes to the VMCS on every exit, which exit reasons dominate a running guest, and why the host-side handler usually costs more than the transition itself. virtualization
- Dec 2, 2025 Interrupt Delivery Inside a Virtual Machine Why injecting an interrupt into a guest can cost a world switch, how posted interrupts and APIC virtualization remove that cost, and what remains expensive. operating systems
- Jun 4, 2025 Emulated MMIO: Instruction Decode, Register Semantics, and Exit Storms How a write to an emulated device register becomes a trap, what the hypervisor must decode before it can act, and why a driver that pokes registers in a loop degrades an entire host. virtualization