[Bug 229852] [PATCH] bhyve: IOMMU (Intel VTd) PCI passthrough attempt locks up some systems

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229852

Niels Bakker <niels=freebsd at bakker.net> changed:

           What    |Removed                     |Added
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                 CC|                            |niels=freebsd at bakker.net

--- Comment #1 from Niels Bakker <niels=freebsd at bakker.net> ---
I ran into this issue (on an Intel Celeron 3865U) with the exact symptoms
described in the linked thread, and the patch resolved it for me as well.

I had tried the other workaround before - only pick devices on another PCI bus
and IRQ line for passthru - but that did not help. Without this patch, any
attempt to use a passthru device immediately crashes the whole computer by
rendering all PCI devices like AHCI and USB controllers absent.

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