CreateEventEx() does not allow the following event types:

* EVT_SIGNAL_EXIT_BOOT_SERVICES
* EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE

This check is needed to pass the UEFI SCT conformance test.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
Reviewed-by: Alexander Graf <ag...@csgraf.de>
---
v2
        correct commit message
---
 lib/efi_loader/efi_boottime.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 602b0da9f0..8965dabb2b 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -665,10 +665,26 @@ efi_status_t EFIAPI efi_create_event_ex(uint32_t type, 
efi_uintn_t notify_tpl,
                                        efi_guid_t *event_group,
                                        struct efi_event **event)
 {
+       efi_status_t ret;
+
        EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function,
                  notify_context, event_group);
-       return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
-                                        notify_context, event_group, event));
+
+       /*
+        * The allowable input parameters are the same as in CreateEvent()
+        * except for the following two disallowed event types.
+        */
+       switch (type) {
+       case EVT_SIGNAL_EXIT_BOOT_SERVICES:
+       case EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE:
+               ret = EFI_INVALID_PARAMETER;
+               goto out;
+       }
+
+       ret = efi_create_event(type, notify_tpl, notify_function,
+                              notify_context, event_group, event);
+out:
+       return EFI_EXIT(ret);
 }

 /**
--
2.20.1

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