On 23/09/15 02:55, chenfeng wrote:
Hi all,
In IOMMU architecture , how to make two different peripherals share the same
page table ?
In other words , is there a mechanism or structure to make two peripherals get
completely different address.
eg:
peri-A、peri-B and peri-C share the same iova address 0-1G for some performance
requests.
So the A,B,C need to use the same IOVA generator to ensure this,but I don't
find an architecture to make this.
This is what IOMMU domains are all about: devices in one domain are
isolated from devices in different domains, so all you need to do is
make sure all devices that want to share buffers are attached to the
same domain, then they will all share that domain's IOVA space.
Robin.
Any help will be appreciated.
Puck
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