Re: [Xen-devel] Mapping hvm guest pages in Dom0

["Jean Guyader" <jean.guyader@xxxxxxxxx>]

Hi,

On Fri, Sep 26, 2008 at 8:02 PM, Satya <satyakiran@xxxxxxxxx> wrote:
> hello,
> I would like to map (Read/Write) pages owned by a HVM guest from my Dom0
> Linux kernel module. I have access to the "machine frame numbers" of these
> pages.
>
> 1. What is the right interface to do this? kmap needs 'struct page' ptrs
> which I doubt exist for pages owned by a HVM guest. Is there a hypercall to
> do this then?
>

You can use xc_map_foreign_ranges function inside libxc (link with xenctrl).

> 2. Do I need to modify the HVM behavior in any way for this? (e.g., load a
> driver in the guest that will setup grant tables?). I need to keep my guest
> "pure HVM".
>

You don't need to modify your hvm for doing that.


-- 
Jean Guyader

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