From: Laszlo Ersek <lersek@redhat.com>
Date: Fri, 26 Feb 2016 23:06:39 +0000 (+0100)
Subject: OvmfPkg: PciHostBridgeLib: set RootBus->NoExtendedConfigSpace
X-Git-Tag: edk2-stable201903~7717
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=cb81595b5d747c60e5ff9d4e048159c59085be6f

OvmfPkg: PciHostBridgeLib: set RootBus->NoExtendedConfigSpace

In "OvmfPkg/PciHostBridgeDxe/PciRootBridgeIo.c", the
RootBridgeIoCheckParameter() function hard-codes the maximum offset for
the PCI config space as 0xFF (see the MAX_PCI_REG_ADDRESS macro), which
matches OVMF's 0xCF8 / 0xCFC config access method.

The "MdeModulePkg/Bus/Pci/PciHostBridgeDxe" driver abstracts away config
space access via the PciSegmentLib class, so it has to be informed
separately about the config space size.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
---

diff --git a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
index b23939d166..cc782c1cc3 100644
--- a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
+++ b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c
@@ -101,6 +101,8 @@ InitRootBridge (
   RootBus->Mem.Limit = PcdGet64 (PcdPciMmio32Base) +
                        (PcdGet64 (PcdPciMmio32Size) - 1);
 
+  RootBus->NoExtendedConfigSpace = TRUE;
+
   return EFI_OUT_OF_RESOURCES;
 }