From c4df7fd01ff46cce6baa0afcc0f32f60bd2b5ace Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Mon, 9 May 2016 22:39:44 +0200
Subject: OvmfPkg/PlatformPei: set PCI IO port aperture dynamically

Make PcdPciIoBase and PcdPciIoSize dynamic PCDs, and set them in
MemMapInitialization(), where we produce our EFI_RESOURCE_IO descriptor
HOB. (The PCD is consumed by the core PciHostBridgeDxe driver, through our
PciHostBridgeLib instance.)

Take special care to keep the GCD IO space map unchanged on all platforms
OVMF runs on.

Cc: Gabriel Somlo <somlo@cmu.edu>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1333238
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Tested-by: Gabriel Somlo <somlo@cmu.edu>
---
 OvmfPkg/PlatformPei/Platform.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

(limited to 'OvmfPkg/PlatformPei')

diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c
index a5654a5118..b03b577013 100644
--- a/OvmfPkg/PlatformPei/Platform.c
+++ b/OvmfPkg/PlatformPei/Platform.c
@@ -156,6 +156,12 @@ MemMapInitialization (
   VOID
   )
 {
+  UINT64 PciIoBase;
+  UINT64 PciIoSize;
+
+  PciIoBase = 0xC000;
+  PciIoSize = 0x4000;
+
   //
   // Create Memory Type Information HOB
   //
@@ -165,17 +171,6 @@ MemMapInitialization (
     sizeof(mDefaultMemoryTypeInformation)
     );
 
-  //
-  // Add PCI IO Port space available for PCI resource allocations.
-  //
-  BuildResourceDescriptorHob (
-    EFI_RESOURCE_IO,
-    EFI_RESOURCE_ATTRIBUTE_PRESENT     |
-    EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
-    PcdGet64 (PcdPciIoBase),
-    PcdGet64 (PcdPciIoSize)
-    );
-
   //
   // Video memory + Legacy BIOS region
   //
@@ -250,6 +245,19 @@ MemMapInitialization (
     }
     AddIoMemoryBaseSizeHob (PcdGet32(PcdCpuLocalApicBaseAddress), SIZE_1MB);
   }
+
+  //
+  // Add PCI IO Port space available for PCI resource allocations.
+  //
+  BuildResourceDescriptorHob (
+    EFI_RESOURCE_IO,
+    EFI_RESOURCE_ATTRIBUTE_PRESENT     |
+    EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
+    PciIoBase,
+    PciIoSize
+    );
+  PcdSet64 (PcdPciIoBase, PciIoBase);
+  PcdSet64 (PcdPciIoSize, PciIoSize);
 }
 
 EFI_STATUS
-- 
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