On Thu, 2012-05-24 at 17:30 -0400, Don Dutile wrote:
> On 05/22/2012 01:05 AM, Alex Williamson wrote:
> > In a PCI environment, transactions aren't always required to reach
> > the root bus before being re-routed. Intermediate switches between
> > an endpoint and the root bus can redirect DMA back
On 05/22/2012 01:05 AM, Alex Williamson wrote:
In a PCI environment, transactions aren't always required to reach
the root bus before being re-routed. Intermediate switches between
an endpoint and the root bus can redirect DMA back downstream before
things like IOMMUs have a chance to intervene.
In a PCI environment, transactions aren't always required to reach
the root bus before being re-routed. Intermediate switches between
an endpoint and the root bus can redirect DMA back downstream before
things like IOMMUs have a chance to intervene. Legacy PCI is always
susceptible to this as it
