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-rw-r--r--OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c4
-rw-r--r--OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf1
2 files changed, 4 insertions, 1 deletions
diff --git a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
index 582e87dd9a..3e02778492 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
+++ b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
@@ -16,6 +16,7 @@
#include <PiDxe.h>
#include <IndustryStandard/Pci.h>
+#include <IndustryStandard/Q35MchIch9.h>
#include <Protocol/PciHostBridgeResourceAllocation.h>
#include <Protocol/PciRootBridgeIo.h>
@@ -139,7 +140,8 @@ InitRootBridge (
RootBus->Mem.Limit = PcdGet64 (PcdPciMmio32Base) +
(PcdGet64 (PcdPciMmio32Size) - 1);
- RootBus->NoExtendedConfigSpace = TRUE;
+ RootBus->NoExtendedConfigSpace = (PcdGet16 (PcdOvmfHostBridgePciDevId) !=
+ INTEL_Q35_MCH_DEVICE_ID);
DevicePath = AllocateCopyPool (sizeof mRootBridgeDevicePathTemplate,
&mRootBridgeDevicePathTemplate);
diff --git a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
index 5467fff8aa..bbec74645c 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
+++ b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
@@ -51,3 +51,4 @@
gUefiOvmfPkgTokenSpaceGuid.PcdPciIoSize
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base
gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId