access usb device from bhyve vm
John Hein
jh-fbml at snkmail.com
Wed Aug 22 16:48:02 UTC 2018
blubee blubeeme wrote at 08:42 +0800 on Aug 22, 2018:
> On Wed, Aug 22, 2018 at 8:26 AM John Hein <jh-fbml at snkmail.com> wrote:
>
> Does anyone have thought about what it would take to support access to
> individual usb devices "natively" from a bhyve vm?
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> I had this idea maybe a year or two years ago, there was also another guy [he worked
> on the fbuffer for bhyve] who wanted to get it done but they were waiting on the
> main guy behind the USB stack on freebsd: hselasky
>
> He was too busy to actually do any work so the project stalled.
>
> My use case for having direct access to usb devices in a bhyve vm could allow rapid
> development of USB drivers for FreeBSD by sniffing the packets being sent over USB
> to the bhyve guest and reverse engineer drivers so that we can write native drivers
> for common devices that aren't supported on FreeBSD yet.
>
> I had to put that on the back burner for a bit since there's a lot more pressing
> FreeBSD issues that I am working on.
>
> What's your use case?
My use case is more specific (and thus perhaps less of a lofty goal?).
I want to access a usb-based fpga jtag programmer from a linux vm
(specifically using a xilinx tool like "impact").
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