How Dealing with Modern Interrupt Architectures Can Affect Your Sanity

Explore the evolution and complexities of interrupt architectures in this 52-minute Linux Foundation conference talk. Delve into the transition from simple wire-based interrupts to modern systems involving cascading controllers, fast EOI, shadow controllers, MSIs, and translation tables. Learn how the Linux kernel's interrupt subsystem has adapted to support these dramatic changes, focusing on functionalities like irqdomain and irqchip. Gain insights into the hierarchical assembly of these components to represent and utilize complex hardware structures. Discover the implications for developers working on new platform support. Presented by Marc Zyngier, an experienced Linux kernel developer and co-maintainer of KVM on ARM(64) and IRQ infrastructure.