[Ksummit-discuss] [CORE TOPIC] Device error handling / reporting / isolation

[Benjamin Herrenschmidt]

On Fri, 2014-05-09 at 12:53 -0700, Roland Dreier wrote:
> 
> Stuff without a device driver should be OK, since we don't turn on any
> bits in the PCI command register until pci_enable_device().  So the
> device can't be a bus master until someone claims it.

Provided you trust the device not to utterly ignore that bit ...

> For devices with a driver, I guess it couldn't hurt.  But my wifi
> adapter can already sniff and modify all my network traffic, etc.
> 
> I do agree that it's a bit sad that the current state of VT-d is such
> that distros don't use it by default.

Cheers,
Ben.