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Date:      Fri, 30 Jul 2021 10:50:21 +1000
From:      Peter Grehan <grehan@freebsd.org>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, freebsd-virtualization@freebsd.org
Subject:   Re: ivhd0 IO_PAGE_FAULT EVT with external disk
Message-ID:  <4c6865aa-f772-b6bd-d16c-ca8958352837@freebsd.org>
In-Reply-To: <alpine.BSF.2.00.2107300018030.68830@ai.fobar.qr>
References:  <alpine.BSF.2.00.2107300018030.68830@ai.fobar.qr>

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Hi Bjoern,

> I grabbed an external USB drive from an Intel machine and put it to an=20
> AMD host
> using it to boot directly from it like:
>  =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 -s 3,ahci-hd,/dev/da0,secto=
rsize=3D512 \
...

> On the AMD machine this doesn't work and I get a lot of:
>=20
> ivhd0: EVT INTR 45 Status:0x1a EVT Head:0xfb0 Tail:0x430]^M
>  =C2=A0 [CMD Total 0xaf] Tail:0xaf0, Head:0xaf0.^M
...
> Is this in theory supposed to work?

  Yes.

> Does this in any way depend on the USB
> port used or are we simply working on the device node?

  bhyve only uses the device node.

  Do you have passthru devices configured ? If so, are they under the=20
same controller that the USB device is on ?

  (also what version of FreeBSD on the host)

later,

Peter.



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