We check the supported protocol of the parent EFI device of
'efi_loaded_image' to see if we are booted from USB or not (HD)
Signed-off-by: Enrico Jorns <ejo@xxxxxxxxxxxxxx>
---
drivers/efi/efi-device.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/drivers/efi/efi-device.c b/drivers/efi/efi-device.c
index 9975aea6f7..3a27323a00 100644
--- a/drivers/efi/efi-device.c
+++ b/drivers/efi/efi-device.c
@@ -17,6 +17,7 @@
*
*/
+#include <bootsource.h>
#include <command.h>
#include <common.h>
#include <driver.h>
@@ -385,6 +386,51 @@ static int efi_is_setup_mode(void)
return ret != 1;
}
+static int is_bio_usbdev(struct efi_device *efidev)
+{
+ int i;
+
+ for (i = 0; i < efidev->num_guids; i++) {
+ if (!efi_guidcmp(efidev->guids[i], EFI_USB_IO_PROTOCOL_GUID))
+ return 1;
+ }
+
+ return 0;
+}
+
+static void efi_set_bootsource(void)
+{
+ enum bootsource src = BOOTSOURCE_UNKNOWN;
+ int instance = BOOTSOURCE_INSTANCE_UNKNOWN;
+
+ efi_handle_t *efi_parent;
+ struct efi_device *bootdev;
+
+ if (!efi_loaded_image->parent_handle)
+ goto out;
+
+ efi_parent = efi_find_parent(efi_loaded_image->device_handle);
+
+ if (!efi_parent)
+ goto out;
+
+ bootdev = efi_find_device(efi_parent);
+
+ if (!bootdev)
+ goto out;
+
+ if (is_bio_usbdev(bootdev)) {
+ src = BOOTSOURCE_USB;
+ } else {
+ src = BOOTSOURCE_HD;
+ }
+
+out:
+
+ bootsource_set(src);
+ bootsource_set_instance(instance);
+}
+
static int efi_init_devices(void)
{
char *fw_vendor = NULL;
@@ -415,6 +461,8 @@ static int efi_init_devices(void)
efi_register_devices();
+ efi_set_bootsource();
+
return 0;
}
core_initcall(efi_init_devices);
--
2.16.1
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