Silly x86-related memory question from someone who has only
used global virtual address machines for too many years:
Is it possible to take the result of an alloc_domheap_pages()
(struct page_info *) and convert this to a virtual address
that can be used at a later time in the hypervisor (not
in a domain)? E.g.
va = mfn_to_virt(page_to_mfn(alloc_domheap_pages()))
 :
(many seconds later, still in hypervisor)
 :
a = *(unsigned int *)va;
Or is it necessary to do a va = map_domain_page(mfn)
then unmap_domain_page(va) around each usage? (And
if so do I need the _global version of these?)
I'm willing to restrict this to 64-bit hypervisor only
if that matters... but ideally I'd like it to be
portable (i.e. to ia64/ppc).
Also, if it matters, I'd probably use anonymous domain
(NULL) rather than current->domain.
Thanks,
Dan
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel