[Xen-devel] How to allocate a page inside the guest OS from Xen

[Abhinav Srivastava <abhinavs_iitkgp@xxxxxxxxxxx>]

Hi there,

In my project, I have to allocate a memory page inside the guest OS from the 
Xen hypervisor. The alloc_domheap_page(d) function allocates a single page from 
the dom heap, which looks okey for my purpose. But, I do not know how to add 
the allocated page into the guest page table, so that guest can access this 
page. I do not want to allocate a Xen page and share it with the guest. 

My question is: how do I make my guest OS aware of this page without doing 
anything inside the guest OS. Is there any function in Xen that directly adds a 
page into the guest OS address space or I have to walk on the guest page tables 
and add this page manually.

Any help would be appreciated?

Thanks,
Abhinav



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