[PATCH 12/12] xen: strip /chosen/module@<N>/* from dom0 device tree

[Ian Campbell <ian.campbell@citrix.com>]

These nodes are used by Xen to find the initial modules.

Only drop the "xen,multiboot-module" compatible nodes in case someone
else has a similar idea.

Signed-off-by: Ian Campbell <ian.campbel@citrix.com>
---
 xen/arch/arm/domain_build.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 7a964f7..d2158d8 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -179,6 +179,7 @@ static int write_nodes(struct domain *d, struct kernel_info *kinfo,
     int depth = 0, last_depth = -1;
     u32 address_cells[DEVICE_TREE_MAX_DEPTH];
     u32 size_cells[DEVICE_TREE_MAX_DEPTH];
+    int parents[DEVICE_TREE_MAX_DEPTH];
     int ret;
 
     for ( node = 0, depth = 0;
@@ -196,10 +197,25 @@ static int write_nodes(struct domain *d, struct kernel_info *kinfo,
         }
 
         while ( last_depth-- >= depth )
+        {
+            parents[last_depth+1] = -1;
             fdt_end_node(kinfo->fdt);
+        }
 
         address_cells[depth] = device_tree_get_u32(fdt, node, "#address-cells");
         size_cells[depth] = device_tree_get_u32(fdt, node, "#size-cells");
+        parents[depth] = node;
+
+        /* Skip /chosen/module@<N>/ nodes */
+        if ( depth == 2 &&
+             device_tree_node_matches(fdt, parents[1], "chosen") &&
+             device_tree_node_matches(fdt, node, "module") &&
+             fdt_node_check_compatible(fdt, node,
+                                       "xen,multiboot-module" ) == 0 )
+        {
+            last_depth = depth - 1;
+            continue;
+        }
 
         fdt_begin_node(kinfo->fdt, name);
 
-- 
1.7.9.1