Re: Does KVM PCI Device Assignment allow guests to access firewire?

[Michael Tokarev <mjt@tls.msk.ru>]

Amit Shah wrote:
> Hello Wayne,
> 
> On (Tue) Jan 27 2009 [21:15:22], Wayne Feick wrote:
>> I recently saw the following:
>>
>>    https://fedoraproject.org/wiki/Features/KVM_PCI_Device_Assignment
>>
>> This looks like it might allow guests to access a firewire device. Can
>> anyone confirm or deny whether that will be the case? 
> 
> Is the firewire port on a PCI card? If yes, it *might* work. We've only
> tested network device assignment so far; if you have a system with VT-d,
> you can give it a try yourself.

JFYI... I tried several simple devices here, all worked.  But all were
without using DMA.  Namely, an old wireless card (11Mbps), internal
PCI dialup modem (not softmodem, courier sportster 56k), a 6-serial-ports
PCI card, and an old USB-1.1 PCI card.  Like this:

03:06.0 Serial controller: 3Com Corp, Modem Division 56K FaxModem Model 5610 (rev 01) (prog-if 02)
	Subsystem: 3Com Corp, Modem Division Device 00a2
	Flags: medium devsel, IRQ 20
	I/O ports at ec00 [size=8]
	Kernel driver in use: serial
	Kernel modules: 8250_pci

With stock kernel-2.6.28 and kvm-83.

Sure thing it is less and less interesting since only very few devices
does not use DMA nowadays.  But I don't have any hardware with IOMMU
or VT-D.

/mjt