[Xen-devel] [PATCH 07/16] xen: arm: Handle cpus nodes with #address-calls > 1

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

The APM X-Gene Mustang board DTS has #address-cells = 2.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/smpboot.c |   25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index 6c90fa6..ce832ae 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -125,18 +125,35 @@ void __init smp_init_cpus(void)
 
     dt_for_each_child_node( cpus, cpu )
     {
+        const __be32 *prop;
+        u64 addr, size;
         u32 hwid;
 
         if ( !dt_device_type_is_equal(cpu, "cpu") )
             continue;
 
-        if ( !dt_property_read_u32(cpu, "reg", &hwid) )
+        if ( dt_n_size_cells(cpu) != 0 )
+            printk(XENLOG_WARNING "cpu node `%s`: #size-cells %d\n",
+                   dt_node_full_name(cpu), dt_n_size_cells(cpu));
+
+        prop = dt_get_property(cpu, "reg", NULL);
+        if ( !prop )
         {
-            printk(XENLOG_WARNING "cpu node `%s`: missing reg property\n",
+            printk(XENLOG_WARNING "cpu node `%s`: has no reg property\n",
                    dt_node_full_name(cpu));
             continue;
         }
 
+        dt_get_range(&prop, cpu, &addr, &size);
+
+        hwid = addr;
+        if ( hwid != addr )
+        {
+            printk(XENLOG_WARNING "cpu node `%s`: hwid overflow %"PRIx64"\n",
+                   dt_node_full_name(cpu), addr);
+            continue;
+        }
+
         /*
          * 8 MSBs must be set to 0 in the DT since the reg property
          * defines the MPIDR[23:0]
@@ -159,8 +176,8 @@ void __init smp_init_cpus(void)
             if ( tmp_map[j] == hwid )
             {
                 printk(XENLOG_WARNING
-                       "cpu node `%s`: duplicate /cpu reg properties in the 
DT\n",
-                       dt_node_full_name(cpu));
+                       "cpu node `%s`: duplicate /cpu reg properties %"PRIx32" 
in the DT\n",
+                       dt_node_full_name(cpu), hwid);
                 break;
             }
         }
-- 
1.7.10.4


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