On Wed, Oct 26, 2016 at 1:24 AM, Haggai Eran <haggaie@xxxxxxxxxxxx> wrote: [..] >> I wonder if we could (ab)use a >> software-defined 'pasid' as the requester id for a peer-to-peer >> mapping that needs address translation. > Why would you need that? Isn't it enough to map the peer-to-peer > addresses correctly in the iommu driver? > You're right, we might already have enough... We would just need to audit iommu drivers to undo any assumptions that the page being mapped is always in host memory and apply any bus address translations between source device and target device. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>