efi_loader: create stub for CreateEventEx

Currently we set the function pointer for the CreateEventEx boot service
to NULL. When called this would lead to an immediate failure.

A function stub is provided which handles the case that the boot service
is called without an event group and returns EFI_UNSUPPORTED otherwise.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/include/efi_api.h b/include/efi_api.h
index 205f8f1f7007a1ab29d82e08864861632aea5fe3..10598a22d55f37fce7f76b76afc58067af623c0d 100644 (file)
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -166,7 +166,14 @@ struct efi_boot_services {
        void (EFIAPI *copy_mem)(void *destination, const void *source,
                        size_t length);
        void (EFIAPI *set_mem)(void *buffer, size_t size, uint8_t value);
-       void *create_event_ex;
+       efi_status_t (EFIAPI *create_event_ex)(
+                               uint32_t type, efi_uintn_t notify_tpl,
+                               void (EFIAPI *notify_function) (
+                                       struct efi_event *event,
+                                       void *context),
+                               void *notify_context,
+                               efi_guid_t *event_group,
+                               struct efi_event **event);
 };
 
 /* Types and defines for EFI ResetSystem */

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index da93498b36bbdec48b653e2046ca7e763479ff4c..2cea712196e98f46cd88c1760cbd6d1d4bd6f7ed 100644 (file)
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -525,6 +525,38 @@ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
        return EFI_OUT_OF_RESOURCES;
 }
 
+/*
+ * Create an event in a group.
+ *
+ * This function implements the CreateEventEx service.
+ * See the Unified Extensible Firmware Interface (UEFI) specification
+ * for details.
+ * TODO: Support event groups
+ *
+ * @type               type of the event to create
+ * @notify_tpl         task priority level of the event
+ * @notify_function    notification function of the event
+ * @notify_context     pointer passed to the notification function
+ * @event              created event
+ * @event_group                event group
+ * @return             status code
+ */
+efi_status_t EFIAPI efi_create_event_ex(uint32_t type, efi_uintn_t notify_tpl,
+                                       void (EFIAPI *notify_function) (
+                                                       struct efi_event *event,
+                                                       void *context),
+                                       void *notify_context,
+                                       efi_guid_t *event_group,
+                                       struct efi_event **event)
+{
+       EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function,
+                 notify_context, event_group);
+       if (event_group)
+               return EFI_EXIT(EFI_UNSUPPORTED);
+       return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
+                                        notify_context, event));
+}
+
 /*
  * Create an event.
  *
@@ -2851,6 +2883,7 @@ static const struct efi_boot_services efi_boot_services = {
        .calculate_crc32 = efi_calculate_crc32,
        .copy_mem = efi_copy_mem,
        .set_mem = efi_set_mem,
+       .create_event_ex = efi_create_event_ex,
 };