libxc: wrappers for XENMEM {increase,decrease}_reservation and populate_physmap

Currently the wrappers for these hypercalls swallow partial success
and return failure to the caller.

In order to use these functions more widely instead of open-coding
uses of XENMEM_* and xc_memory_op add variants which return the actual
hypercall result.

Therefore add the following functions:
  xc_domain_increase_reservation
  xc_domain_decrease_reservation
  xc_domain_populate_physmap
and implement the existing semantics using these new functions as
  xc_domain_increase_reservation_exact
  xc_domain_decrease_reservation_exact
  xc_domain_populate_physmap_exact
replacing the existing xc_domain_memory_* functions.

Use these new functions to replace all open coded uses of
XENMEM_increase_reservation, XENMEM_decrease_reservation and
XENMEM_populate_physmap.

Also rename xc_domain_memory_*_pod_target to xc_domain_*_pod_target
for consistency.

Temporarily add a compatibility macro for
xc_domain_memory_populate_physmap to allow time for qemu to catch up.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/libxc/xc_dom_x86.c b/tools/libxc/xc_dom_x86.c
index b71bf6abcc..060e147c7f 100644
--- a/tools/libxc/xc_dom_x86.c
+++ b/tools/libxc/xc_dom_x86.c
@@ -733,7 +733,7 @@ int arch_setup_meminit(struct xc_dom_image *dom)
         DOMPRINTF("Populating memory with %d superpages", count);
         for ( pfn = 0; pfn < count; pfn++ )
             extents[pfn] = pfn << SUPERPAGE_PFN_SHIFT;
-        rc = xc_domain_memory_populate_physmap(dom->xch, dom->guest_domid,
+        rc = xc_domain_populate_physmap_exact(dom->xch, dom->guest_domid,
                                                count, SUPERPAGE_PFN_SHIFT, 0,
                                                extents);
         if ( rc )
@@ -762,7 +762,7 @@ int arch_setup_meminit(struct xc_dom_image *dom)
             allocsz = dom->total_pages - i;
             if ( allocsz > 1024*1024 )
                 allocsz = 1024*1024;
-            rc = xc_domain_memory_populate_physmap(
+            rc = xc_domain_populate_physmap_exact(
                 dom->xch, dom->guest_domid, allocsz,
                 0, 0, &dom->p2m_host[i]);
         }