[PATCH 2/2] ArmVirtPkg/PlatformBootManagerLib: sync Timeout with PcdPlatformBootTimeOut

["Laszlo Ersek" <lersek@redhat.com>]

Set the Timeout global variable to the same value as
PcdPlatformBootTimeOut. This way the "setvar" command in the UEFI shell,
and the "efibootmgr" command in a Linux guest, can report the front page
timeout that was requested on the QEMU command line (see
GetFrontPageTimeoutFromQemu()).

A DEBUG_VERBOSE message is logged on success too, for our QE team's sake.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---
 ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf |  1 +
 ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c               | 27 ++++++++++++++++++--
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf b/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
index a9d4888d4377..6fe0a1bb122b 100644
--- a/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
+++ b/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBootManagerLib.inf
@@ -68,6 +68,7 @@ [Guids]
   gEfiFileSystemInfoGuid
   gEfiFileSystemVolumeLabelInfoIdGuid
   gEfiEndOfDxeEventGroupGuid
+  gEfiGlobalVariableGuid
   gRootBridgesConnectedEventGroupGuid
   gUefiShellFileGuid
 
diff --git a/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c b/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c
index 5f6cfe64daca..69448ff65bde 100644
--- a/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c
+++ b/ArmVirtPkg/Library/PlatformBootManagerLib/PlatformBm.c
@@ -25,6 +25,7 @@
 #include <Protocol/PciRootBridgeIo.h>
 #include <Protocol/VirtioDevice.h>
 #include <Guid/EventGroup.h>
+#include <Guid/GlobalVariable.h>
 #include <Guid/RootBridgesConnectedEventGroup.h>
 #include <Guid/SerialPortLibVendor.h>
 
@@ -686,7 +687,9 @@ PlatformBootManagerBeforeConsole (
   VOID
   )
 {
+  UINT16        FrontPageTimeout;
   RETURN_STATUS PcdStatus;
+  EFI_STATUS    Status;
 
   //
   // Signal EndOfDxe PI Event
@@ -744,9 +747,29 @@ PlatformBootManagerBeforeConsole (
   //
   // Set the front page timeout from the QEMU configuration.
   //
-  PcdStatus = PcdSet16S (PcdPlatformBootTimeOut,
-                GetFrontPageTimeoutFromQemu ());
+  FrontPageTimeout = GetFrontPageTimeoutFromQemu ();
+  PcdStatus = PcdSet16S (PcdPlatformBootTimeOut, FrontPageTimeout);
   ASSERT_RETURN_ERROR (PcdStatus);
+  //
+  // Reflect the PCD in the standard Timeout variable.
+  //
+  Status = gRT->SetVariable (
+                  EFI_TIME_OUT_VARIABLE_NAME,
+                  &gEfiGlobalVariableGuid,
+                  (EFI_VARIABLE_NON_VOLATILE |
+                   EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                   EFI_VARIABLE_RUNTIME_ACCESS),
+                  sizeof FrontPageTimeout,
+                  &FrontPageTimeout
+                  );
+  DEBUG ((
+    EFI_ERROR (Status) ? DEBUG_ERROR : DEBUG_VERBOSE,
+    "%a: SetVariable(%s, %u): %r\n",
+    __FUNCTION__,
+    EFI_TIME_OUT_VARIABLE_NAME,
+    FrontPageTimeout,
+    Status
+    ));
 
   //
   // Register platform-specific boot options and keyboard shortcuts.
-- 
2.19.1.3.g30247aa5d201