bhyve - windows7 installation

[Rodney W. Grimes]

> >>>>> Harry Schmalzbauer <freebsd at omnilan.de> writes:
> 
>     >  Bez?glich Ludovit Koren's Nachricht vom 01.03.2018 08:22 (localtime):
>     >> 
>     >> Hi,
...
>     > After connecting via VNC the vm boots from DVD and you see the setup
>     > program. You won't have mouse support, but keyboard's been working, right?
>     > So you have been able to finsih setup and login via VNC, still no mouse.
>     > Use your existing setup or do a new one to make the last assumptions true.
>     > If you booted with the two ISO images, use the keyboard to start
>     > "control panel/Device Manager", where you should find the unattached
>     > virtio NIC. Installt/Update the driver from there, you can tell the
>     > assistant to use e:\ as source (your 2nd. ODD).
> 
> Thank you very much. It is up and running.
>
> I have an additional question. When I try to run:
> 
> bhyve -c 1 -s 0,hostbridge -s 3,ahci-hd,/dev/zvol/zroot/msw7,sectorsize=512/8192 -s 10,virtio-net,tap1 -s 31,lpc -s 29,fbuf,tcp=0.0.0.0:5900,w=1366,h=768,wait -s 26,passthru,0/26/0 -S -l com1,/dev/nmdm0A -l com2,/dev/nmdm1A -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -m 4G -H -w windows7
> bhyve: passthru device 0/26/0 BAR 0: base 0xd4739000 or size 0x400 not page aligned
                                                               ^^^^^
> 
> bhyve: failed to initialize BARs for PCI 0/26/0
> 
> 
> 
> pciconf -vlb ppt0 at pci0:0:26:0
> ppt0 at pci0:0:26:0:       class=0x0c0320 card=0x17df103c chip=0x1e2d8086 rev=0x04 hdr=0x00
>     vendor     = 'Intel Corporation'
>     device     = '7 Series/C216 Chipset Family USB Enhanced Host Controller'
>     class      = serial bus
>     subclass   = USB
>     bar   [10] = type Memory, range 32, base 0xd4739000, size 1024, enabled
                                                           ^^^^^^^^^^

Due to the design of the IOMMU you can only manage IO space in page
(4096 on x86) granually sizes.  The device your trying to pass in
has a 1024 byte memory region that is part of a 4096 byte page that
may have other things in it.

At this time bhyve does not have any way to deal with this, though some
other hypervisors have techniques that make this work.

I do not have or know of any list of USB controller cards that
have 4k aligned and 4k sized BAR's.

> The intention is to have usb device in the windows.

A discussion recently in the developers conference call
touched on this very subject.  The basic design would be
rather than pass in a whole controller would be to add
the ability to pass in individual devices.

> Any suggestions?

Are you trying to pass in a motherboard resource?
You might find an add on USB card that has proper BAR
size and alignment, though I have no tips for which
ones do or dont.

It may also be possible to hack the code to ignore the
error IF SECRUITY IS OF NO CONCERN, as this hack would
allow the VM guest to access devices outside of its
domain.  I am uncertain if this might have other side
effects as to loss of access to devices in the same
page from the host perspective.

-- 
Rod Grimes                                                 rgrimes at freebsd.org