Tag
posted-interrupts
- Jul 23, 2026 Virtualizing the Local APIC: Access Pages, Virtual Interrupt Delivery, and Posted Interrupts Why every interrupt acknowledgement used to cost an exit, how hardware removed the exit for the common case, and what a posted interrupt descriptor does between the device and the guest. virtualization
- Feb 6, 2026 Virtual Interrupts: APIC Emulation, Interrupt Remapping, and Posted Delivery How a guest programs its own interrupt controller without touching the host's, what the IOMMU must check before a device interrupt is delivered, and why posted interrupts remove the exit from the delivery path. 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