RE: [Xen-devel] asterisk, ztdummy, and usb (and HZ = 100 under xen ???)

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> Assuming you have restricted the domain to just accessing registers
and
> IRQs belonging to the device it controls, I think the only way would
be
> by programming the device to wreak havoc on its behalf (by DMAing
> arbitrary memory).

Is there a way to protect against rogue DMA writes (without knowing the
details of every particular piece of hardware) or is it just the price
to be paid for direct hardware access?

James

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