Re: [Xen-devel] [PATCH 1 of 5] tools: Add xc_domain_set_memory_map and xc_get_machine_memory_map calls

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Fri, Apr 08, 2011 at 09:18:59AM +0100, Ian Campbell wrote:
> On Thu, 2011-04-07 at 21:25 +0100, Konrad Rzeszutek Wilk wrote:
> > # HG changeset patch
> > # User Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > # Date 1302194186 14400
> > # Node ID decab6c21cc3d7ce4d4dad949d34ba35d4600490
> > # Parent  97763efc41f9b664cf6f7db653c9c3f51e50b358
> > tools: Add xc_domain_set_memory_map and xc_get_machine_memory_map calls.
> > 
> > The later retrieves the E820 as seen by the hypervisor (completly
> > unchanged) and the second call sets the E820 for a specific guest.
> > 
> > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > 
> > diff -r 97763efc41f9 -r decab6c21cc3 tools/libxc/xc_domain.c
> > --- a/tools/libxc/xc_domain.c       Tue Apr 05 18:23:54 2011 +0100
> > +++ b/tools/libxc/xc_domain.c       Thu Apr 07 12:36:26 2011 -0400
> > @@ -510,6 +510,55 @@
> 
> Please add:
>         [diff]
>         showfunc = True
> to your ~/.hgrc

Aye aye
> 
> >  
> >      return rc;
> >  }
> > +
> > +int xc_domain_set_memory_map(xc_interface *xch,
> > +                               uint32_t domid,
> > +                               struct e820entry entries[],
> > +                               uint32_t nr_entries)
> > +{
> > +    int rc;
> > +    struct xen_foreign_memory_map fmap = {
> > +        .domid = domid,
> > +        .map = { .nr_entries = nr_entries }
> > +    };
> > +    DECLARE_HYPERCALL_BOUNCE(entries, nr_entries * sizeof(struct 
> > e820entry),
> > +                             XC_HYPERCALL_BUFFER_BOUNCE_IN);
> > +
> > +    if ( !entries || xc_hypercall_bounce_pre(xch, entries) )
> > +        return -1;
> > +
> > +    set_xen_guest_handle(fmap.map.buffer, entries);
> > +
> > +    rc = do_memory_op(xch, XENMEM_set_memory_map, &fmap, sizeof(fmap));
> > +
> > +    xc_hypercall_bounce_post(xch, entries);
> > +
> > +    return rc;
> > +}
> 
> Should probably reimplement xc_domain_set_memmap_limit() as a wrapper
> around this new function. And/or nuke it if that's an option.

Yes! Will do that.

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