On 15/09/2016 07:54, Raslan, KarimAllah wrote: > >> On Jun 22, 2016, at 3:41 PM, Paolo Bonzini <pbonz...@redhat.com> wrote: >> >> >> >> On 22/06/2016 04:34, KarimAllah Ahmed wrote: >>> pfn_valid check is not sufficient because it only checks if a page has a >>> struct >>> page or not, if for example "mem=" was passed to the kernel some valid pages >>> won't have a struct page. This means that if guests were assigned valid >>> memory >>> that lies after the mem= boundary it will be passed uncached to the guest no >>> matter what the guest caching attributes are for this memory. >> >> How can you pass memory after the mem= boundary to the guest? > > Does my previous reply answer your question?
Yes, but I'm not sure it's the right way to do it. Looking at the e820 memory map seems pretty hacky. Paolo
