[edk2-platforms][PATCH 1/1] Platform/RPi: Inhibit serial output for all runtime drivers

["Pete Batard" <pete@akeo.ie>]

From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

This is an improvement of e9db04631b63574b090aeab769cc47dcb75a29f7
where we inhibit serial output of MMIO mapped UARTs to all runtime
drivers rather than just RTC, as other drivers may crash the OS
just the same.

Also add it to the Pi 4 platform where it was missing altogether.

Signed-off-by: Pete Batard <pete@akeo.ie>
---
 Platform/RaspberryPi/RPi3/RPi3.dsc | 3 ++-
 Platform/RaspberryPi/RPi4/RPi4.dsc | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Platform/RaspberryPi/RPi3/RPi3.dsc b/Platform/RaspberryPi/RPi3/RPi3.dsc
index 945baa5021f8..2368b04f40a4 100644
--- a/Platform/RaspberryPi/RPi3/RPi3.dsc
+++ b/Platform/RaspberryPi/RPi3/RPi3.dsc
@@ -200,6 +200,8 @@ [LibraryClasses.common.UEFI_DRIVER]
   MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
 
 [LibraryClasses.common.DXE_RUNTIME_DRIVER]
+  # Runtime debug messages may crash an OS unless serial output to MMIO mapped UARTs is inhibited
+  DebugLib|MdePkg/Library/DxeRuntimeDebugLibSerialPort/DxeRuntimeDebugLibSerialPort.inf
   MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
   CapsuleLib|MdeModulePkg/Library/DxeCapsuleLibNull/DxeCapsuleLibNull.inf
   EfiResetSystemLib|Platform/RaspberryPi/Library/ResetLib/ResetLib.inf
@@ -505,7 +507,6 @@ [Components.common]
   EmbeddedPkg/ResetRuntimeDxe/ResetRuntimeDxe.inf
   EmbeddedPkg/RealTimeClockRuntimeDxe/RealTimeClockRuntimeDxe.inf {
     <LibraryClasses>
-      DebugLib|MdePkg/Library/DxeRuntimeDebugLibSerialPort/DxeRuntimeDebugLibSerialPort.inf
       RealTimeClockLib|EmbeddedPkg/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf
   }
   EmbeddedPkg/MetronomeDxe/MetronomeDxe.inf
diff --git a/Platform/RaspberryPi/RPi4/RPi4.dsc b/Platform/RaspberryPi/RPi4/RPi4.dsc
index 3764d1b3d794..03139e57a8db 100644
--- a/Platform/RaspberryPi/RPi4/RPi4.dsc
+++ b/Platform/RaspberryPi/RPi4/RPi4.dsc
@@ -202,6 +202,8 @@ [LibraryClasses.common.UEFI_DRIVER]
   MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
 
 [LibraryClasses.common.DXE_RUNTIME_DRIVER]
+  # Runtime debug messages may crash an OS unless serial output to MMIO mapped UARTs is inhibited
+  DebugLib|MdePkg/Library/DxeRuntimeDebugLibSerialPort/DxeRuntimeDebugLibSerialPort.inf
   MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
   CapsuleLib|MdeModulePkg/Library/DxeCapsuleLibNull/DxeCapsuleLibNull.inf
   EfiResetSystemLib|Platform/RaspberryPi/Library/ResetLib/ResetLib.inf
-- 
2.21.0.windows.1