2022-07-27 17:43 (UTC-0400), Don Wallwork: > On 7/27/2022 4:36 PM, Dmitry Kozlyuk wrote: > > I now understand more about_why_ you want this feature > > but became less confident_what_ do you're proposing specifically. > > Let me try to give a trivial example of how it would work > to make sure we're on the same page and then we can get > back to details..
Thanks you, Don. Now it's perfectly clear what EAL should do and we can discuss API. [...] > So in this example, we have a fixed offset of 9G to translate > between VA to PA or vice versa.This works whether the huge > pages happen to be allocated statically (legacy mode) or > dynamically. True! One special case is external memory (rte_extmem_*) which has user-controlled VA and IOVA. If all non-external memory is mapped within one VA region, it is possible to detect that an address is in external memory, although it's an extra check.
