[PATCH v2] bootstd: Make efi_mgr bootmeth work for non-sandbox setups

[Mark Kettenis]

Enable the bootflow based on this bootmeth if the BootOrder EFI
variable is set.

Signed-off-by: Mark Kettenis <kettenis at openbsd.org>
---

ChangeLog:

v2: - Initialize EFI subsystem to populate EFI variables


 boot/bootmeth_efi_mgr.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/boot/bootmeth_efi_mgr.c b/boot/bootmeth_efi_mgr.c
index e9d973429f..e6c42d41fb 100644
--- a/boot/bootmeth_efi_mgr.c
+++ b/boot/bootmeth_efi_mgr.c
@@ -14,6 +14,8 @@
 #include <bootmeth.h>
 #include <command.h>
 #include <dm.h>
+#include <efi_loader.h>
+#include <efi_variable.h>
 
 /**
  * struct efi_mgr_priv - private info for the efi-mgr driver
@@ -46,13 +48,26 @@ static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
 static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
 {
 	struct efi_mgr_priv *priv = dev_get_priv(dev);
+	efi_status_t ret;
+	efi_uintn_t size;
+	u16 *bootorder;
 
 	if (priv->fake_dev) {
 		bflow->state = BOOTFLOWST_READY;
 		return 0;
 	}
 
-	/* To be implemented */
+	ret = efi_init_obj_list();
+	if (ret)
+		return log_msg_ret("init", ret);
+
+	/* Enable this method if the "BootOrder" UEFI exists. */
+	bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid,
+				&size);
+	if (bootorder) {
+		bflow->state = BOOTFLOWST_READY;
+		return 0;
+	}
 
 	return -EINVAL;
 }
-- 
2.42.0