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bhyve: Use pci(4) to access I/O port BARs
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Authored by markj on Jul 26 2021, 4:45 PM.
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Details

Summary

This removes the dependency on /dev/io, which cannot be used in jails.

PR: 251046

Test Plan

I passed a realtek NIC through to a FreeBSD VM and configured hw.re.prefer_iomap=1
in the guest, to make it use I/O port BARs. I did some quick tests with iperf through the
passed-through NIC.

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Repository
rG FreeBSD src repository
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