[Bug 205549] bhyve pci passthru stops working after guest is restarted

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205549

arkadyi <ark at dudevich.dn.ua> changed:

           What    |Removed                     |Added
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                 CC|                            |ark at dudevich.dn.ua

--- Comment #2 from arkadyi <ark at dudevich.dn.ua> ---
I have the same problem on ThinkPad T530 with FreeBSD 12.0-RELEASE-p2 r342912.
Custom kernel without xhci.
ppt0 at pci0:0:20:0:       class=0x0c0330 card=0x21f617aa chip=0x1e318086 rev=0x04
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '7 Series/C210 Series Chipset Family USB xHCI Host Controller'
    class      = serial bus
    subclass   = USB
When I first start a Linux virtual machine, everything works fine.
If the Linux VM is turned off correctly, then when I restart(second start)
Linux VM , I see the same problem.

If I destroy Linux VM(I mean kill process bhyve), second start Linux VM work
without problem.

I do not see this, if I use Windows VM(Windows 7).

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