add PCIe support #469
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add PCIe support #469
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This is my current working state of PCIe support (#425). The code only builds on x86_64 Linux (need to
#ifdefeverything for other targets) and could still be cleaned up further. Especially the page table modification is a dirty hack at best.I kept the ABI changes fairly limited, PCIe resources/DMA-ready memory is simply mapped into the unikernel at pre-determined offsets.
Currently I don't have the time to deal with it further but if somebody were to review it and point out necessary changes I'd be happy to take another look in a few weeks time.