[PATCH 20/21] xen/arm: Use dedicated function for Static SHM Device Tree creation

[Hirokazu Takahashi <taka@xxxxxxxxxxxxx>]

Use a dedicated function to create Static SHM Device Tree nodes instead
of reusing the generic memory node function.

Since the memory banks managing Static SHM repurpose the 'type' field
for a different purpose via a union, separating this creation logic
keeps the implementation clean and significantly improves maintainability.
---
 xen/arch/arm/domain_build.c           |  6 ++++++
 xen/common/device-tree/domain-build.c | 21 +++++++++++++++++++++
 xen/include/xen/fdt-domain-build.h    |  2 ++
 3 files changed, 29 insertions(+)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 7960dcd33a..1cd66c9911 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1805,6 +1805,12 @@ static int __init handle_node(struct domain *d, struct 
kernel_info *kinfo,
         if ( res )
             return res;
 
+#ifdef CONFIG_STATIC_SHM
+        res = make_raw_memory_node(kinfo, addrcells, sizecells, 
kernel_info_get_shm_mem_const(kinfo));
+        if ( res )
+            return res;
+#endif /* CONFIG_STATIC_SHM */
+
         res = make_distance_map_node(d, kinfo->fdt);
         if ( res )
             return res;
diff --git a/xen/common/device-tree/domain-build.c 
b/xen/common/device-tree/domain-build.c
index 61e2e50062..f846ca0471 100644
--- a/xen/common/device-tree/domain-build.c
+++ b/xen/common/device-tree/domain-build.c
@@ -565,6 +565,27 @@ int __init make_memory_node(const struct kernel_info 
*kinfo, int addrcells,
     return res;
 }
 
+int __init make_raw_memory_node(const struct kernel_info *kinfo, int addrcells,
+                            int sizecells, const struct membanks *mem)
+{
+    unsigned int i;
+    int res = 0;
+
+    if ( mem->nr_banks == 0 )
+        return 0;
+
+    dt_dprintk("Create raw memory nodes\n");
+
+    for ( i = 0 ; i < mem->nr_banks; i++ )
+    {
+        res = make_memory_sibling_node(kinfo, addrcells, sizecells, 
&mem->bank[i]);
+        if ( res )
+            return res;
+    }
+
+    return res;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/xen/fdt-domain-build.h 
b/xen/include/xen/fdt-domain-build.h
index 671486c1c8..6a809f3f86 100644
--- a/xen/include/xen/fdt-domain-build.h
+++ b/xen/include/xen/fdt-domain-build.h
@@ -31,6 +31,8 @@ int make_hypervisor_node(struct domain *d, const struct 
kernel_info *kinfo,
                          int addrcells, int sizecells);
 int make_memory_node(const struct kernel_info *kinfo, int addrcells,
                      int sizecells, const struct membanks *mem);
+int make_raw_memory_node(const struct kernel_info *kinfo, int addrcells,
+                         int sizecells, const struct membanks *mem);
 int make_timer_node(const struct kernel_info *kinfo);
 
 static inline int get_allocation_size(paddr_t size)
-- 
2.43.0