From 0f6ff51d88db8bcceb42a71344346f842253f0df Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Sun, 13 Mar 2016 18:08:26 +0100
Subject: OvmfPkg: PlatformBdsLib: signal gRootBridgesConnectedEventGroupGuid

The explanation is in the patch titled

  OvmfPkg: introduce gRootBridgesConnectedEventGroupGuid

At this point, this signal doesn't do anything yet.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
---
 OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c      | 6 ++++++
 OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf | 1 +
 2 files changed, 7 insertions(+)

diff --git a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
index 4a2f7f332d..0bc02baf03 100644
--- a/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
+++ b/OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c
@@ -13,6 +13,7 @@
 **/
 
 #include "BdsPlatform.h"
+#include <Guid/RootBridgesConnectedEventGroup.h>
 #include <Library/QemuBootOrderLib.h>
 
 
@@ -1244,6 +1245,11 @@ Returns:
   VisitAllInstancesOfProtocol (&gEfiPciRootBridgeIoProtocolGuid,
     ConnectRootBridge, NULL);
 
+  //
+  // Signal the ACPI platform driver that it can download QEMU ACPI tables.
+  //
+  EfiEventGroupSignal (&gRootBridgesConnectedEventGroupGuid);
+
   //
   // We can't signal End-of-Dxe earlier than this. Namely, End-of-Dxe triggers
   // the preparation of S3 system information. That logic has a hard dependency
diff --git a/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf b/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
index ab5468368d..6a04b45803 100644
--- a/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
+++ b/OvmfPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
@@ -70,3 +70,4 @@
 
 [Guids]
   gEfiEndOfDxeEventGroupGuid
+  gRootBridgesConnectedEventGroupGuid
-- 
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