xen-hvm: When using xc_domain_add_to_physmap also include errno when reporting

.errors - as it will most likely have the proper error value.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

xen-hvm.c

diff --git a/xen-hvm.c b/xen-hvm.c
index d17d3f3..0f81f7f 100644
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -348,7 +348,7 @@
         rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
         if (rc) {
             DPRINTF("add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
-                    PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
+                    PRI_xen_pfn" failed: %d (errno: %d)\n", idx, gpfn, rc, errno);
             return -rc;
         }
     }
@@ -425,7 +425,7 @@
         rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
         if (rc) {
             fprintf(stderr, "add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
-                    PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
+                    PRI_xen_pfn" failed: %d (errno: %d)\n", idx, gpfn, rc, errno);
             return -rc;
         }
     }