add PCIe support #1160
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add PCIe support #1160
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This is my current working state of PCIe support in MirageOS. Currently PCIe devices are supported on Linux via
mirage-pci-unixand Solo5 (hvt on Linux only) viamirage-pci-solo5, both throughmirage-pci. Both versions use the host's IOMMU through VFIO. The only driver currently supported isixy.mlwhich acts as a MirageOS network device.There are still a few little things to be ironed out and a bunch of cleanup to be done, and also the modifications to Solo5 are not upstreamed (and I doubt they will be in the current state). Currently I don't have the time to deal with it. If somebody were to review the code and point out what needs to be done, I'd be happy to take a look in the coming weeks.
I built the modifications against the latest MirageOS stable release and only just now rebased onto master.
To try a full setup an ixgbe-compatible NIC, a modified build of mirage-solo5, a modified build of hvt and ixy.ml are required. I tested such a setup using mirage_iperf with a tweaked config.