X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OvmfPkg%2FOvmfPkgX64.dsc;h=18517e337649474be89ff98665e3c54f8efa83e5;hp=b971ee8bb56b2f6c61a44844bd7490c1d156b734;hb=7b8fe63561b43f0ae47673a32d27e4967149b556;hpb=b01acf6ea7e729a690ff6aa926a5ea20611eb117

diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index b971ee8bb5..18517e3376 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -400,6 +400,14 @@
   gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask|0x2F
 !endif
 
+  # This PCD is used to set the base address of the PCI express hierarchy. It
+  # is only consulted when OVMF runs on Q35. In that case it is programmed into
+  # the PCIEXBAR register.
+  #
+  # On Q35 machine types that QEMU intends to support in the long term, QEMU
+  # never lets the RAM below 4 GB exceed 2 GB.
+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress|0x80000000
+
 !ifdef $(SOURCE_DEBUG_ENABLE)
   gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugLoadImageMethod|0x2
 !endif