libvfio-user: Status Update
summary
libvfio-user is a C library that implements a socket protocol for external device servers, provides PCI config handling, and exposes APIs for synchronous/asynchronous device emulation. It demonstrates live migration using a migration region with callbacks (get_pending_bytes, read_data, prepare_data) and a working demo migrating a simple GPIO device from a C server to a Rust server. The protocol supports file-descriptor sharing for mmap of BARs and guest memory, eventfd-based IRQs, and plans include better PCI support, multithreading, and faster MMIO.
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chapters (7)
- 0:00Start
- 0:33KVM Forum 2019
- 3:01vfio-user message types
- 4:20libvfio-user "Hello World"
- 6:44IRQ handling
- 8:07Device region access: MMIO and DMA
- 9:32Guest memory: Device DMA
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