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Date:      Mon, 19 Jul 2021 11:15:16 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 257273] PCI-e passthrough MSI-X not working for iwlwifi
Message-ID:  <bug-257273-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D257273

            Bug ID: 257273
           Summary: PCI-e passthrough MSI-X not working for iwlwifi
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: bz@FreeBSD.org

Hi,

opening the PR to track this.

When running FreeBSD inside bhyve to test/use iwlwifi wireless
(https://wiki.freebsd.org/WiFi/Iwlwifi) this does not work with the default
driver using MSI-X.   It seems interrupts are not arriving.  When disabling
MSI-X (by patch for tunable) and forcing it to use MSI that does work.

In addition to some tracing done as suggested by @grehan I also tried/appli=
ed
D20623, D24549, and D28277 locally (one which removed some noise from traci=
ng)
but apart from that did not make any difference.

In case anyone has seen similar or has ideas what to try, please let me kno=
w.

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