Re: [PATCH v8 0/4] Support AMD CDX bus

[Thomas Monjalon <thomas@monjalon.net>]

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.