From 26d16863ccb72fd9ac3cbec8d732e0574610893b Mon Sep 17 00:00:00 2001
From: lilu <lilu@hygon.cn>
Date: Thu, 7 Sep 2023 14:44:59 +0800
Subject: [PATCH 11/11] OvmfPkg: Use classic mmio window for CSV guest

For CSV guest, firmware restricts gpa range. Dynamic mmio window
sets Mmio64Base exceeding firmware restriction. Use classic mmio
window for CSV guest. Classic mmio window is less than firmware
restriction under real circumstances.

Signed-off-by: Xin Jiang <jiangxin@hygon.cn>
---
 OvmfPkg/Library/CsvLib/CsvLib.inf                   | 2 +-
 OvmfPkg/Library/PlatformInitLib/MemDetect.c         | 4 +++-
 OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/OvmfPkg/Library/CsvLib/CsvLib.inf b/OvmfPkg/Library/CsvLib/CsvLib.inf
index 57efbe70..bcb6546f 100644
--- a/OvmfPkg/Library/CsvLib/CsvLib.inf
+++ b/OvmfPkg/Library/CsvLib/CsvLib.inf
@@ -21,7 +21,7 @@
   FILE_GUID                      = 9460ef3a-b9c3-11e9-8324-7371ac35e1e3
   MODULE_TYPE                    = BASE
   VERSION_STRING                 = 1.0
-  LIBRARY_CLASS                  = CsvLib|PEIM DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_DRIVER
+  LIBRARY_CLASS                  = CsvLib|SEC PEIM DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_DRIVER
 
 #
 # The following information is for reference only and not required by the build
diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/PlatformInitLib/MemDetect.c
index 3c9f01cf..7eef68a0 100644
--- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c
+++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c
@@ -40,6 +40,7 @@ Module Name:
 #include <Library/QemuFwCfgLib.h>
 #include <Library/QemuFwCfgSimpleParserLib.h>
 #include <Library/TdxLib.h>
+#include <Library/CsvLib.h>
 
 #include <Library/PlatformInitLib.h>
 
@@ -687,7 +688,8 @@ PlatformDynamicMmioWindow (
   AddrSpace = LShiftU64 (1, PlatformInfoHob->PhysMemAddressWidth);
   MmioSpace = LShiftU64 (1, PlatformInfoHob->PhysMemAddressWidth - 3);
 
-  if ((PlatformInfoHob->PcdPciMmio64Size < MmioSpace) &&
+  if (!CsvIsEnabled() &&
+      (PlatformInfoHob->PcdPciMmio64Size < MmioSpace) &&
       (PlatformInfoHob->PcdPciMmio64Base + MmioSpace < AddrSpace))
   {
     DEBUG ((DEBUG_INFO, "%a: using dynamic mmio window\n", __func__));
diff --git a/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf b/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf
index 5a79d95b..8fc80f48 100644
--- a/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf
+++ b/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf
@@ -52,6 +52,7 @@
   PcdLib
   PciLib
   PeiHardwareInfoLib
+  CsvLib
 
 [LibraryClasses.X64]
   TdxLib
-- 
2.43.0