MSI Interrupts - 3.3 English

Versal ACAP CPM DMA and Bridge Mode for PCI Express Product Guide (PG347)

Document ID
PG347
Release Date
2022-11-02
Version
3.3 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 Xilinx® Linux driver supports only 1 MSI vector.