[U-Boot] [PATCH 9/9] efi_selftest: check fdt is marked as runtime data

[Heinrich Schuchardt]

Check that the memory area containing the device tree is marked as runtime
data.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 lib/efi_selftest/efi_selftest_memory.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/lib/efi_selftest/efi_selftest_memory.c 
b/lib/efi_selftest/efi_selftest_memory.c
index 0623e8e62da..24b4438ce4f 100644
--- a/lib/efi_selftest/efi_selftest_memory.c
+++ b/lib/efi_selftest/efi_selftest_memory.c
@@ -6,13 +6,17 @@
  *
  * This unit test checks the following runtime services:
  * AllocatePages, FreePages, GetMemoryMap
+ *
+ * The memory type used for the device tree is checked.
  */
 
 #include <efi_selftest.h>
 
 #define EFI_ST_NUM_PAGES 8
 
+static const efi_guid_t fdt_guid = EFI_FDT_GUID;
 static struct efi_boot_services *boottime;
+static u64 fdt_addr;
 
 /**
  * setup() - setup unit test
@@ -24,8 +28,20 @@ static struct efi_boot_services *boottime;
 static int setup(const efi_handle_t handle,
                 const struct efi_system_table *systable)
 {
+       size_t i;
+
        boottime = systable->boottime;
 
+       for (i = 0; i < systable->nr_tables; ++i) {
+               if (!efi_st_memcmp(&systable->tables[i].guid, &fdt_guid,
+                                  sizeof(efi_guid_t))) {
+                       if (fdt_addr) {
+                               efi_st_error("Duplicate device tree\n");
+                               return EFI_ST_FAILURE;
+                       }
+                       fdt_addr = (uintptr_t)systable->tables[i].table;
+               }
+       }
        return EFI_ST_SUCCESS;
 }
 
@@ -152,6 +168,14 @@ static int execute(void)
                return EFI_ST_FAILURE;
        }
 
+       /* Check memory reservation for the device tree */
+       if (fdt_addr &&
+           find_in_memory_map(map_size, memory_map, desc_size, fdt_addr,
+                              EFI_RUNTIME_SERVICES_DATA) != EFI_ST_SUCCESS) {
+               efi_st_error
+                       ("Device tree not marked as runtime services data\n");
+               return EFI_ST_FAILURE;
+       }
        return EFI_ST_SUCCESS;
 }
 
-- 
2.19.1

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