MSI Interrupts - 2.0 English

Versal Adaptive SoC DMA and Bridge Subsystem for PCI Express Product Guide (PG344)

Document ID
PG344
Release Date
2024-06-03
Version
2.0 English

For MSI interrupts, you can select from 1 to 32 vectors in the PCIe Misc tab under MSI Capabilities, which consists of a maximum of 16 usable DMA interrupt vectors and a maximum of 16 usable user interrupt vectors. The Linux operating system (OS) supports only 1 vector. Other operating systems might support more vectors and you can program different vectors values in the IRQ Block Channel Vector and in the IRQ Block User Vector to represent different interrupt sources. The AMD Linux driver supports only 1 MSI vector.