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efi_loader: TPL_HIGH_LEVEL not allowed for CreateEvent

According to chapter 7.1 "Event, Timer, and Task Priority Services"
TPL_HIGH_LEVEL should not be exposed to applications and drivers.

According to the discussion with EDK II contributors this implies that
CreateEvent() shall not allow to create events with TPL_HIGH_LEVEL.

Cc: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
Heinrich Schuchardt 3 år sedan
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2 ändrade filer med 1 tillägg och 2 borttagningar
  1. 0 1
      lib/efi_loader/efi_boottime.c
  2. 1 1
      lib/efi_selftest/efi_selftest_tpl.c

+ 0 - 1
lib/efi_loader/efi_boottime.c

@@ -264,7 +264,6 @@ efi_status_t is_valid_tpl(efi_uintn_t tpl)
 	case TPL_APPLICATION:
 	case TPL_CALLBACK:
 	case TPL_NOTIFY:
-	case TPL_HIGH_LEVEL:
 		return EFI_SUCCESS;
 	default:
 		return EFI_INVALID_PARAMETER;

+ 1 - 1
lib/efi_selftest/efi_selftest_tpl.c

@@ -55,7 +55,7 @@ static int setup(const efi_handle_t handle,
 		return EFI_ST_FAILURE;
 	}
 	ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT,
-				     TPL_HIGH_LEVEL, notify, NULL, &event_wait);
+				     TPL_NOTIFY, notify, NULL, &event_wait);
 	if (ret != EFI_SUCCESS) {
 		efi_st_error("could not create event\n");
 		return EFI_ST_FAILURE;