07/06/2023 06:24, Nipun Gupta: > The CDX devices are memory mapped on system bus for embedded CPUs. > > It uses sysfs interface and the vfio-cdx driver to discover > and initialize the CDX devices. > > The CDX bus and VFIO support is available at Xilinx/AMD open source tree: > https://github.com/Xilinx/linux-xlnx (drivers/cdx/ and drivers/vfio/cdx) > > Linux AMD CDX bus patches has been added into linux tree: > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/cdx > > VFIO patches are also submitted in upstream: > https://www.spinics.net/lists/kvm/msg310623.html > > CDX is a Hardware Architecture designed for AMD FPGA devices. It > consists of mechanism for interaction between FPGA, Firmware and > the APUs (Application CPUs). > Firmware resides on RPU (Realtime CPUs) which interacts with > the FPGA program manager and the APUs. The RPU provides memory-mapped > interface (RPU if) which is used to communicate with APUs. > > VFIO CDX driver provides the CDX device resources like MMIO and interrupts > to map to user-space. DPDK CDX bus uses sysfs interface and the vfio-cdx > driver to discover and initialize the CDX devices for user-space > applications.
Applied, thanks.
