[PATCH v4 3/3] efi_rng_protocol: Install the efi_rng_protocol on the root node

[Sughosh Ganu]

Install the EFI_RNG_PROTOCOL implementation for it's subsequent use by
the kernel for features like kaslr.

Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 include/efi_loader.h           | 4 ++++
 lib/efi_loader/efi_rng.c       | 2 ++
 lib/efi_loader/efi_root_node.c | 4 ++++
 3 files changed, 10 insertions(+)

diff --git a/include/efi_loader.h b/include/efi_loader.h
index bec7873..bfcfa74 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -130,6 +130,7 @@ extern const struct efi_hii_config_routing_protocol efi_hii_config_routing;
 extern const struct efi_hii_config_access_protocol efi_hii_config_access;
 extern const struct efi_hii_database_protocol efi_hii_database;
 extern const struct efi_hii_string_protocol efi_hii_string;
+extern const struct efi_rng_protocol efi_rng_protocol;
 
 uint16_t *efi_dp_str(struct efi_device_path *dp);
 
@@ -175,6 +176,9 @@ extern const efi_guid_t efi_guid_hii_config_access_protocol;
 extern const efi_guid_t efi_guid_hii_database_protocol;
 extern const efi_guid_t efi_guid_hii_string_protocol;
 
+/* GUID of RNG protocol */
+extern const efi_guid_t efi_guid_rng_protocol;
+
 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
 
diff --git a/lib/efi_loader/efi_rng.c b/lib/efi_loader/efi_rng.c
index 2e7a148..d1f5400 100644
--- a/lib/efi_loader/efi_rng.c
+++ b/lib/efi_loader/efi_rng.c
@@ -11,6 +11,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+const efi_guid_t efi_guid_rng_protocol = EFI_RNG_PROTOCOL_GUID;
+
 __weak efi_status_t platform_get_rng_device(struct udevice **dev)
 {
 	int ret;
diff --git a/lib/efi_loader/efi_root_node.c b/lib/efi_loader/efi_root_node.c
index f68b0fd..76d18fb 100644
--- a/lib/efi_loader/efi_root_node.c
+++ b/lib/efi_loader/efi_root_node.c
@@ -81,6 +81,10 @@ efi_status_t efi_root_node_register(void)
 			 &efi_guid_hii_config_routing_protocol,
 			 (void *)&efi_hii_config_routing,
 #endif
+#if CONFIG_IS_ENABLED(EFI_RNG_PROTOCOL)
+			 &efi_guid_rng_protocol,
+			 (void *)&efi_rng_protocol,
+#endif
 			 NULL));
 	efi_root->type = EFI_OBJECT_TYPE_U_BOOT_FIRMWARE;
 	return ret;
-- 
2.7.4