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Date:      Tue, 27 Mar 2018 15:32:19 +0200
From:      Wouter Snels <nospam@ofloo.net>
To:        Peter Grehan <grehan@freebsd.org>
Cc:        "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net>, freebsd-virtualization@freebsd.org
Subject:   Re: bhyve pci passthrough usb controller
Message-ID:  <d31c6b41-a092-582c-e25e-699646f3e451@ofloo.net>
In-Reply-To: <48cef2a2-f8de-1784-9094-daeb2dd7d55a@freebsd.org>
References:  <201803240230.w2O2U21F033917@pdx.rh.CN85.dnsmgr.net> <bfda0fa1-48be-4bc5-9172-8de89e4196fc@ofloo.net> <48cef2a2-f8de-1784-9094-daeb2dd7d55a@freebsd.org>

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Hi, ..

I've looked up if the "upd720202" supports msi interrupts and it does.

http://www.phasure.com/index.php?action=dlattach;topic=2784.0;attach=3281

Regards, ..

Op 25-03-18 om 03:01 schreef Peter Grehan:
>
>> I surely will try this out, but what about device 4/0/0 showing the
>> same issue. Both tests where performed separately showing the exact
>> same result, of course I'd be happy if either one of them worked.
>
>  I think what is happening here is that Windows is enabling legacy
> interrupts on the device, and that happens to be on the same shared
> IRQ line that the ATA controller is on, resulting in spurious interrupts.
>
>  The dmesg for the system may be able to confirm this, since it should
> list the legacy IRQs that have been assigned.
>
>  bhyve PCI passthru relies not only on the device supporting MSI/MSI-x
> interrupts, but the guest using those.
>
> later,
>
> Peter.




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