[Xen-devel] [PATCH RFC 22/35] xen/arm: Create chosen node for DOM0

[parth.dixit@xxxxxxxxxx]

From: Naresh Bhat <naresh.bhat@xxxxxxxxxx>

Create a chosen node for DOM0 with
 - bootargs
 - rsdp

Signed-off-by: Naresh Bhat <naresh.bhat@xxxxxxxxxx>
Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx>
---
 xen/arch/arm/domain_build.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 30bebe5..d781c63 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -19,6 +19,7 @@
 #include <asm/setup.h>
 #include <asm/cpufeature.h>
 #include <asm/acpi.h>
+#include <xen/acpi.h>
 
 #include <asm/gic.h>
 #include <xen/irq.h>
@@ -1199,6 +1200,41 @@ static int make_memory_node_acpi(const struct domain *d,
     return res;
 }
 
+static int make_chosen_node(const struct domain *d, const struct kernel_info 
*kinfo)
+{
+   int res = 0;
+   const char *bootargs = NULL;
+   const struct bootmodule *mod = kinfo->kernel_bootmodule;
+   u64 a = acpi_os_get_root_pointer();
+   void *fdt = kinfo->fdt;
+   __be32 val[2];
+   __be32 *cellp;
+
+   DPRINT("Create bootargs chosen node\n");
+
+   if ( mod && mod->cmdline[0] )
+        bootargs = &mod->cmdline[0];
+
+   res = fdt_begin_node(fdt, "chosen");
+   if ( res )
+       return res;
+
+   res = fdt_property(fdt, "bootargs", bootargs, (strlen(bootargs)+1));
+   if ( res )
+      return res;
+
+   cellp = (__be32 *)val;
+   dt_set_cell(&cellp, ARRAY_SIZE(val), a);
+
+   res = fdt_property(fdt, "rsdp", &val, sizeof(val));
+   if ( res )
+       return res;
+
+    res = fdt_end_node(fdt);
+
+    return res;
+}
+
 /*
  * Prepare a minimal DTB for DOM0 which contains
  * bootargs, memory information,
@@ -1244,6 +1280,11 @@ static int prepare_dtb_acpi(struct domain *d, struct 
kernel_info *kinfo)
     if ( ret )
         goto err;
 
+    /* Create a chosen node for DOM0 */
+    ret = make_chosen_node(d, kinfo);
+    if ( ret )
+        goto err;
+
     ret = fdt_end_node(kinfo->fdt);
     if ( ret < 0 )
         goto err;
-- 
1.9.1


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