On Wednesday 21 May 2008 11:41:14 Sujit Sanjeev wrote: > Hi, > > I am trying to access guest memory areas (both kernel and user space) from > within lguest. > > I was able to read the guest kernel area by using the __pa() value of the > guest address as the source address in copy_from_user(). > > I was wondering, if there is a similar method to read the contents from > guest userspace area too. Since, as I understand __pa() > works only on kernel virtual addresses. What would be an equivalent to read > contents from guest's user space? > > Basically, given a virtual address of a guest user space program, how do I > read the contents at that address from within > the hypervisor (lguest).
Yes, you need to get_user_pages() the pages in the guest kernel, then hand those physical addresses to the hypervisor. Otherwise the pages might not even be resident. Hope that helps, Rusty. _______________________________________________ Lguest mailing list [email protected] https://ozlabs.org/mailman/listinfo/lguest
