efi_loader: allow creating new handles

In efi_install_protocol_interface support creating
a new handle.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 9e741c3cf3c73b008ce9e4186c6bf448bf803f8a..c8f39b5b10a1c097e5f71e9bc17468e5fbea5d26 100644 (file)
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -266,6 +266,23 @@ static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
        return EFI_EXIT(r);
 }
 
+static efi_status_t efi_create_handle(void **handle)
+{
+       struct efi_object *obj;
+       efi_status_t r;
+
+       r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
+                             sizeof(struct efi_object),
+                             (void **)&obj);
+       if (r != EFI_SUCCESS)
+               return r;
+       memset(obj, 0, sizeof(struct efi_object));
+       obj->handle = obj;
+       list_add_tail(&obj->link, &efi_obj_list);
+       *handle = obj;
+       return r;
+}
+
 /*
  * Our event capabilities are very limited. Only a small limited
  * number of events is allowed to coexist.
@@ -520,8 +537,9 @@ static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
 
        /* Create new handle if requested. */
        if (!*handle) {
-               r = EFI_OUT_OF_RESOURCES;
-               goto out;
+               r = efi_create_handle(handle);
+               if (r != EFI_SUCCESS)
+                       goto out;
        }
        /* Find object. */
        list_for_each(lhandle, &efi_obj_list) {