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_private.c b/tools/libxc/xc_private.c
index ccc1370229..d32c1d42cb 100644
--- a/tools/libxc/xc_private.c
+++ b/tools/libxc/xc_private.c
@@ -675,14 +675,14 @@ unsigned long xc_make_page_below_4G(
     xen_pfn_t old_mfn = mfn;
     xen_pfn_t new_mfn;
 
-    if ( xc_domain_memory_decrease_reservation(
+    if ( xc_domain_decrease_reservation_exact(
         xch, domid, 1, 0, &old_mfn) != 0 )
     {
         DPRINTF("xc_make_page_below_4G decrease failed. mfn=%lx\n",mfn);
         return 0;
     }
 
-    if ( xc_domain_memory_increase_reservation(
+    if ( xc_domain_increase_reservation_exact(
         xch, domid, 1, 0, XENMEMF_address_bits(32), &new_mfn) != 0 )
     {
         DPRINTF("xc_make_page_below_4G increase failed. mfn=%lx\n",mfn);