1 files changed, 18 insertions, 7 deletions

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 1093f80c162d..e03c63692176 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -75,7 +75,7 @@ static void __init xen_add_extra_mem(u64 start, u64 size)
         if (i == XEN_EXTRA_MEM_MAX_REGIONS)
                 printk(KERN_WARNING "Warning: not enough extra memory regions\n");
 
-        memblock_x86_reserve_range(start, start + size, "XEN EXTRA");
+        memblock_reserve(start, size);
 
         xen_max_p2m_pfn = PFN_DOWN(start + size);
 
@@ -173,9 +173,21 @@ static unsigned long __init xen_get_max_pages(void)
         domid_t domid = DOMID_SELF;
         int ret;
 
-        ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
-        if (ret > 0)
-                max_pages = ret;
+        /*
+         * For the initial domain we use the maximum reservation as
+         * the maximum page.
+         *
+         * For guest domains the current maximum reservation reflects
+         * the current maximum rather than the static maximum. In this
+         * case the e820 map provided to us will cover the static
+         * maximum region.
+         */
+        if (xen_initial_domain()) {
+                ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
+                if (ret > 0)
+                        max_pages = ret;
+        }
+
         return min(max_pages, MAX_DOMAIN_PAGES);
 }
 
@@ -299,9 +311,8 @@ char * __init xen_memory_setup(void)
          *  - xen_start_info
          * See comment above "struct start_info" in <xen/interface/xen.h>
          */
-        memblock_x86_reserve_range(__pa(xen_start_info->mfn_list),
-                      __pa(xen_start_info->pt_base),
-                        "XEN START INFO");
+        memblock_reserve(__pa(xen_start_info->mfn_list),
+                         xen_start_info->pt_base - xen_start_info->mfn_list);
 
         sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);