[Bug 205445] [bhyve] PCI passthru pci_intr_map: bad interrupt line 20, OpenBSD guest couldn't map interrupt

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205445

--- Comment #5 from Peter Grehan <grehan at FreeBSD.org> ---
Apologies - I should have been a bit clearer.

>PCI passthru with bhyve is restricted to devices that support
>MSI or MSI-X, which is generally PCI-e devices.

 This also requires guest support of MSI/MSI-x, where there are no legacy
interrupts available.

 The OpenBSD em/iwm drivers may either not use MSI, or require legacy
interrupts to be valid before using MSI.

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