[Xen-devel] [PATCH v4 7/7] OvmfPkg: enable Xen specific path

[Wei Liu <wei.liu2@xxxxxxxxxx>]

This patch sets PcdPciDisableBusEnumeration to true then makes use of
PublishPeiMemory and XenMemMapInitialization to construct memory map for
Xen guest.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 OvmfPkg/OvmfPkgIa32.dsc             |    6 +++++-
 OvmfPkg/OvmfPkgIa32X64.dsc          |    6 +++++-
 OvmfPkg/OvmfPkgX64.dsc              |    6 +++++-
 OvmfPkg/PlatformPei/Platform.c      |   13 +++++++++++--
 OvmfPkg/PlatformPei/PlatformPei.inf |    1 +
 5 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 760bd41..d2341d6 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -320,6 +320,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE
 
 
 
################################################################################
@@ -384,7 +385,10 @@
   UefiCpuPkg/CpuDxe/CpuDxe.inf
   PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
   PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
+  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf {
+    <LibraryClasses>
+      PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
+  }
   PcAtChipsetPkg/KbcResetDxe/Reset.inf
   MdeModulePkg/Universal/Metronome/Metronome.inf {
     <LibraryClasses>
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 268d722..c3e1a80 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -326,6 +326,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE
 
 
 
################################################################################
@@ -391,7 +392,10 @@
   UefiCpuPkg/CpuDxe/CpuDxe.inf
   PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
   PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
+  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf {
+    <LibraryClasses>
+      PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
+  }
   PcAtChipsetPkg/KbcResetDxe/Reset.inf
   MdeModulePkg/Universal/Metronome/Metronome.inf {
     <LibraryClasses>
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 53945d0..4043f69 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -325,6 +325,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase|0
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration|FALSE
 
 
 
################################################################################
@@ -389,7 +390,10 @@
   UefiCpuPkg/CpuDxe/CpuDxe.inf
   PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
   PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
+  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf {
+    <LibraryClasses>
+      PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
+  }
   PcAtChipsetPkg/KbcResetDxe/Reset.inf
   MdeModulePkg/Universal/Metronome/Metronome.inf {
     <LibraryClasses>
diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index 83acd8b..6c40190 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -416,7 +416,12 @@ InitializePlatform (
 
   XenLeaf = XenDetect ();
 
-  TopOfMemory = MemDetect ();
+  if (XenLeaf != 0) {
+    PublishPeiMemory ();
+    PcdSetBool (PcdPciDisableBusEnumeration, TRUE);
+  } else {
+    TopOfMemory = MemDetect ();
+  }
 
   if (XenLeaf != 0) {
     DEBUG ((EFI_D_INFO, "Xen was detected\n"));
@@ -427,7 +432,11 @@ InitializePlatform (
 
   PeiFvInitialization ();
 
-  MemMapInitialization (TopOfMemory);
+  if (XenLeaf != 0) {
+    XenMemMapInitialization ();
+  } else {
+    MemMapInitialization (TopOfMemory);
+  }
 
   MiscInitialization ();
 
diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf 
b/OvmfPkg/PlatformPei/PlatformPei.inf
index 3d5cbbb..7fe9d47 100644
--- a/OvmfPkg/PlatformPei/PlatformPei.inf
+++ b/OvmfPkg/PlatformPei/PlatformPei.inf
@@ -65,6 +65,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
   gUefiCpuPkgTokenSpaceGuid.PcdCpuLocalApicBaseAddress
 
 [Ppis]
-- 
1.7.10.4


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