[Xen-devel] [PATCH] linux/x86: set up machine_e820 in copy_e820_map()

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

.. for it to be usable earlier (and also for being placed more
logically).

As usual, written and tested on 2.6.25 and made apply to the 2.6.18
tree without further testing.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: head-2008-04-02/arch/i386/kernel/setup-xen.c
===================================================================
--- head-2008-04-02.orig/arch/i386/kernel/setup-xen.c   2008-03-05 
15:22:37.000000000 +0100
+++ head-2008-04-02/arch/i386/kernel/setup-xen.c        2008-04-14 
10:44:52.000000000 +0200
@@ -736,6 +736,21 @@ int __init copy_e820_map(struct e820entr
 #endif
                add_memory_region(start, size, type);
        } while (biosmap++,--nr_map);
+
+#ifdef CONFIG_XEN
+       if (is_initial_xendomain()) {
+               struct xen_memory_map memmap;
+
+               memmap.nr_entries = E820MAX;
+               set_xen_guest_handle(memmap.buffer, machine_e820.map);
+
+               if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
+                       BUG();
+               machine_e820.nr_map = memmap.nr_entries;
+       } else
+               machine_e820 = e820;
+#endif
+
        return 0;
 }
 
@@ -1569,18 +1584,8 @@ void __init e820_register_memory(void)
 static void __init register_memory(void)
 {
 #ifdef CONFIG_XEN
-       if (is_initial_xendomain()) {
-               struct xen_memory_map memmap;
-
-               memmap.nr_entries = E820MAX;
-               set_xen_guest_handle(memmap.buffer, machine_e820.map);
-
-               if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
-                       BUG();
-
-               machine_e820.nr_map = memmap.nr_entries;
+       if (is_initial_xendomain())
                e820_setup_gap(machine_e820.map, machine_e820.nr_map);
-       }
        else
 #endif
                e820_setup_gap(e820.map, e820.nr_map);
Index: head-2008-04-02/arch/x86_64/kernel/e820-xen.c
===================================================================
--- head-2008-04-02.orig/arch/x86_64/kernel/e820-xen.c  2008-04-02 
15:00:51.000000000 +0200
+++ head-2008-04-02/arch/x86_64/kernel/e820-xen.c       2008-04-14 
10:45:51.000000000 +0200
@@ -604,6 +604,21 @@ static int __init copy_e820_map(struct e
 
                add_memory_region(start, size, type);
        } while (biosmap++,--nr_map);
+
+#ifdef CONFIG_XEN
+       if (is_initial_xendomain()) {
+               struct xen_memory_map memmap;
+
+               memmap.nr_entries = E820MAX;
+               set_xen_guest_handle(memmap.buffer, machine_e820.map);
+
+               if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
+                       BUG();
+               machine_e820.nr_map = memmap.nr_entries;
+       } else
+               machine_e820 = e820;
+#endif
+
        return 0;
 }
 
Index: head-2008-04-02/arch/x86_64/kernel/setup-xen.c
===================================================================
--- head-2008-04-02.orig/arch/x86_64/kernel/setup-xen.c 2008-04-08 
14:33:27.000000000 +0200
+++ head-2008-04-02/arch/x86_64/kernel/setup-xen.c      2008-04-14 
10:46:32.000000000 +0200
@@ -903,18 +903,8 @@ void __init setup_arch(char **cmdline_p)
         */
        probe_roms();
 #ifdef CONFIG_XEN
-       if (is_initial_xendomain()) {
-               struct xen_memory_map memmap;
-
-               memmap.nr_entries = E820MAX;
-               set_xen_guest_handle(memmap.buffer, machine_e820.map);
-
-               if (HYPERVISOR_memory_op(XENMEM_machine_memory_map, &memmap))
-                       BUG();
-               machine_e820.nr_map = memmap.nr_entries;
-
+       if (is_initial_xendomain())
                e820_reserve_resources(machine_e820.map, machine_e820.nr_map);
-       }
 #else
        e820_reserve_resources(e820.map, e820.nr_map);
 #endif




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