On Tue, 18 Oct 2016 19:34:10 -0400, Tony Harminc wrote: > >If you want to do I/O to your real storage, that is what IDAWs are >for. Perhaps there are undocumented (or at least not publicly >documented) IBM facilities -- I'm guessing things like crypto, >compression, newer non traditional I/O -- that take real addresses and >need more than a page at a time, but I don't know of any. In this >sense, VM's Diagnose interface is an outlier. > I understand that for some time IEBCOPY could not deal with VIO because IEBCOPY dealt only with real addresses and VIO dealt only with virtual addresses. I was slightly surprised when the conflict was resolved by modifying VIO rather than IEBCOPY. I suppose this required something like an inverse LRA.
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