Hi All, I am working on some PV stuff and had some questions about the ability to share memory across the Guest/Host boundary.
It seems that most examples of how to do this always involve starting with a *page, converting it to a gfn via page_to_gfn(), and using that as a gpa to pass across the boundary. I understand that this method avoids a software traipse through the page-walker, so it's nice. What I can't quite figure out is what are the other types of memory (if any) that can be passed across. For instance, is a pointer from kmalloc() considered a gpa, a gva, neither? Or are gva's only pointers that come from guest-userspace, etc. Is it possible to pass something like a skb->data pointer (I understand that I may have to run the page-walker for some of these)? If so, how would I do this: E.g. can I just pass the pointer, and then do gva_to_hpa() on the host? Or do I need to prep the pointer before sending it? TIA -Greg ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
