From f9cd283aa1102eef6f1f88c875cc06cdffac2115 Mon Sep 17 00:00:00 2001
From: Luigi Leonardi <leonardi@redhat.com>
Date: Tue, 13 Jan 2026 07:06:08 -0500
Subject: [PATCH] OvmfPkg/Microvm: add memory debug log support

Enable memory-based debug logging support when `DEBUG_TO_MEM` build flag
is set.

Signed-off-by: Luigi Leonardi <leonardi@redhat.com>
---
 OvmfPkg/Microvm/MicrovmX64.dsc | 23 +++++++++++++++++++++++
 OvmfPkg/Microvm/MicrovmX64.fdf |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/OvmfPkg/Microvm/MicrovmX64.dsc b/OvmfPkg/Microvm/MicrovmX64.dsc
index 884d5a9432..0186456170 100644
--- a/OvmfPkg/Microvm/MicrovmX64.dsc
+++ b/OvmfPkg/Microvm/MicrovmX64.dsc
@@ -249,7 +249,11 @@
   TdxLib|MdePkg/Library/TdxLib/TdxLib.inf
   TdxMailboxLib|OvmfPkg/Library/TdxMailboxLib/TdxMailboxLibNull.inf
   TdxHelperLib|OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperLibNull.inf
+!if $(DEBUG_TO_MEM)
+  MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogDxeLib.inf
+!else
   MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogLibNull.inf
+!endif
 
 [LibraryClasses.common.SEC]
   QemuFwCfgLib|OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgSecLib.inf
@@ -257,6 +261,9 @@
   DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformRomDebugLibIoPort.inf
+!endif
+!if $(DEBUG_TO_MEM)
+  MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogSecLib.inf
 !endif
   ReportStatusCodeLib|MdeModulePkg/Library/PeiReportStatusCodeLib/PeiReportStatusCodeLib.inf
   ExtractGuidedSectionLib|MdePkg/Library/BaseExtractGuidedSectionLib/BaseExtractGuidedSectionLib.inf
@@ -285,6 +292,9 @@
   DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformRomDebugLibIoPort.inf
+!endif
+!if $(DEBUG_TO_MEM)
+  MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogPeiCoreLib.inf
 !endif
   PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
   PeCoffLib|MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
@@ -303,6 +313,9 @@
   DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformRomDebugLibIoPort.inf
+!endif
+!if $(DEBUG_TO_MEM)
+  MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogPeiLib.inf
 !endif
   PeCoffLib|MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
   ResourcePublicationLib|MdePkg/Library/PeiResourcePublicationLib/PeiResourcePublicationLib.inf
@@ -348,6 +361,9 @@
   DebugLib|MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
+!endif
+!if $(DEBUG_TO_MEM)
+  MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogRtLib.inf
 !endif
   UefiRuntimeLib|MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
@@ -667,6 +683,9 @@
   # PEI Phase modules
   #
   MdeModulePkg/Core/Pei/PeiMain.inf
+!if $(DEBUG_TO_MEM)
+  OvmfPkg/MemDebugLogPei/MemDebugLogPei.inf
+!endif
   MdeModulePkg/Universal/PCD/Pei/Pcd.inf  {
     <LibraryClasses>
       PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
@@ -700,6 +719,7 @@
   MdeModulePkg/Universal/PCD/Dxe/Pcd.inf  {
    <LibraryClasses>
       PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+      MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogLibNull.inf
   }
 
   MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
@@ -767,6 +787,9 @@
     <LibraryClasses>
       DevicePathLib|MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
       PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+!if $(DEBUG_TO_MEM)
+      MemDebugLogLib|OvmfPkg/Library/MemDebugLogLib/MemDebugLogLibNull.inf
+!endif
   }
   MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf
   MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
diff --git a/OvmfPkg/Microvm/MicrovmX64.fdf b/OvmfPkg/Microvm/MicrovmX64.fdf
index 3986a8af19..043e793e84 100644
--- a/OvmfPkg/Microvm/MicrovmX64.fdf
+++ b/OvmfPkg/Microvm/MicrovmX64.fdf
@@ -96,6 +96,9 @@ APRIORI PEI {
 #
 #  PEI Phase modules
 #
+!if $(DEBUG_TO_MEM)
+  INF  OvmfPkg/MemDebugLogPei/MemDebugLogPei.inf
+!endif
 INF  MdeModulePkg/Core/Pei/PeiMain.inf
 INF  MdeModulePkg/Universal/PCD/Pei/Pcd.inf
 INF  MdeModulePkg/Universal/ReportStatusCodeRouter/Pei/ReportStatusCodeRouterPei.inf