[U-Boot] [PATCH 1/4] efi_loader: mark started images

[Takahiro Akashi <takahiro.akashi@linaro.org>]

On Tue, May 07, 2019 at 07:26:46AM +0200, Heinrich Schuchardt wrote:
> On 5/7/19 5:02 AM, Takahiro Akashi wrote:
> >On Sat, May 04, 2019 at 10:36:33AM +0200, Heinrich Schuchardt wrote:
> >>In UnloadImage() we need to know if an image is already started.
> >>
> >>Add a field to the handle structure identifying loaded and started images.
> >>
> >>Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
> >>---
> >>  include/efi_loader.h          | 13 +++++++++++++
> >>  lib/efi_loader/efi_boottime.c |  2 ++
> >>  2 files changed, 15 insertions(+)
> >>
> >>diff --git a/include/efi_loader.h b/include/efi_loader.h
> >>index 3fd9901d66..c2a449e5b6 100644
> >>--- a/include/efi_loader.h
> >>+++ b/include/efi_loader.h
> >>@@ -182,6 +182,18 @@ struct efi_handler {
> >>  	struct list_head open_infos;
> >>  };
> >>
> >>+/**
> >>+ * enum efi_object_type - type of EFI object
> >>+ *
> >>+ * In UnloadImage we must be able to identify if the handle relates to a
> >>+ * started image.
> >>+ */
> >>+enum efi_object_type {
> >>+	EFI_OBJECT_TYPE_UNDEFINED = 0,
> >>+	EFI_OBJECT_TYPE_LOADED_IMAGE,
> >>+	EFI_OBJECT_TYPE_STARTED_IMAGE,
> >>+};
> >
> >It sounds *status*, not *type*.
> >In a separate patch, you added U_BOOT_FIRMWARE.
> >We should distinguish status and type for future enhancement and
> >to avoid any confusion.
> 
> Having both information in the same field makes the evaluation easier.
> 
> Currently I see not necessity for more handle types to be
> differentiated. Let's change it when the need arises.

I don't think we need U_BOOT_FIRMWARE if we use STARTED_IMAGE
for root node. Then we can rename efi_object_type to efi_image_status.

-Takahiro Akashi


> Best regards
> 
> Heinrich
> 
> >
> >Thanks,
> >-Takahiro Akashi
> >
> >
> >>  /**
> >>   * struct efi_object - dereferenced EFI handle
> >>   *
> >>@@ -204,6 +216,7 @@ struct efi_object {
> >>  	struct list_head link;
> >>  	/* The list of protocols */
> >>  	struct list_head protocols;
> >>+	enum efi_object_type type;
> >>  };
> >>
> >>  /**
> >>diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> >>index 3ed08e7c37..dc444fccf6 100644
> >>--- a/lib/efi_loader/efi_boottime.c
> >>+++ b/lib/efi_loader/efi_boottime.c
> >>@@ -1554,6 +1554,7 @@ efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
> >>  		free(info);
> >>  		return EFI_OUT_OF_RESOURCES;
> >>  	}
> >>+	obj->header.type = EFI_OBJECT_TYPE_LOADED_IMAGE;
> >>
> >>  	/* Add internal object to object list */
> >>  	efi_add_handle(&obj->header);
> >>@@ -2678,6 +2679,7 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
> >>  	}
> >>
> >>  	current_image = image_handle;
> >>+	image_obj->header.type = EFI_OBJECT_TYPE_STARTED_IMAGE;
> >>  	EFI_PRINT("Jumping into 0x%p\n", image_obj->entry);
> >>  	ret = EFI_CALL(image_obj->entry(image_handle, &systab));
> >>
> >>--
> >>2.20.1
> >>
> >
>