The "pc" ("pc-i440fx-*") machine types of QEMU don't support extended config space. Accordingly, OVMF will use the following library instances in connection with the core PciHostBridgeDxe driver:
BasePciSegmentLibPci [class: PciSegmentLib] BasePciLibCf8 [class: PciLib] BasePciCf8Lib [class: PciCf8Lib] Add a new field to the PCI_ROOT_BRIDGE structure so that RootBridgeIoCheckParameter() can catch config space offsets above 0xFF on such old (emulated) platforms. Cc: Ruiyu Ni <ruiyu...@intel.com> Cc: Jordan Justen <jordan.l.jus...@intel.com> Cc: Marcel Apfelbaum <mar...@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <ler...@redhat.com> --- Notes: v2: - replace the PCI config space "aperture" with a dedicated BOOLEAN flag called ExtendedConfigSpace [Ray] - simplify the commit message MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h | 1 + MdeModulePkg/Include/Library/PciHostBridgeLib.h | 4 ++++ MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c | 4 +++- 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h index b1e83f1c9089..f9839fed4628 100644 --- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h +++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h @@ -72,6 +72,7 @@ typedef struct { PCI_ROOT_BRIDGE_APERTURE MemAbove4G; PCI_ROOT_BRIDGE_APERTURE PMemAbove4G; BOOLEAN DmaAbove4G; + BOOLEAN ExtendedConfigSpace; VOID *ConfigBuffer; EFI_DEVICE_PATH_PROTOCOL *DevicePath; CHAR16 *DevicePathStr; diff --git a/MdeModulePkg/Include/Library/PciHostBridgeLib.h b/MdeModulePkg/Include/Library/PciHostBridgeLib.h index b1dba0f754d7..fbf3be860c13 100644 --- a/MdeModulePkg/Include/Library/PciHostBridgeLib.h +++ b/MdeModulePkg/Include/Library/PciHostBridgeLib.h @@ -34,6 +34,10 @@ typedef struct { ///< and SetAttributes() in EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL. BOOLEAN DmaAbove4G; ///< DMA above 4GB memory. ///< Set to TRUE when root bridge supports DMA above 4GB memory. + BOOLEAN ExtendedConfigSpace; ///< When TRUE, the root bridge supports + ///< Extended (4096-byte) Configuration Space. + ///< When FALSE, the root bridge supports + ///< 256-byte Configuration Space only. UINT64 AllocationAttributes; ///< Allocation attributes. ///< Refer to EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM and ///< EFI_PCI_HOST_BRIDGE_MEM64_DECODE used by GetAllocAttributes() diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c index 332860eb3819..b0b1a2c18cca 100644 --- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c +++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c @@ -80,6 +80,7 @@ CreateRootBridge ( DEBUG ((EFI_D_INFO, "%s\n", DevicePathStr = ConvertDevicePathToText (Bridge->DevicePath, FALSE, FALSE))); DEBUG ((EFI_D_INFO, "Support/Attr: %lx / %lx\n", Bridge->Supports, Bridge->Attributes)); DEBUG ((EFI_D_INFO, " DmaAbove4G: %s\n", Bridge->DmaAbove4G ? L"Yes" : L"No")); + DEBUG ((EFI_D_INFO, "ExtConfSpace: %s\n", Bridge->ExtendedConfigSpace ? L"Yes" : L"No")); DEBUG ((EFI_D_INFO, " AllocAttr: %lx (%s%s)\n", Bridge->AllocationAttributes, (Bridge->AllocationAttributes & EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM) != 0 ? L"CombineMemPMem " : L"", (Bridge->AllocationAttributes & EFI_PCI_HOST_BRIDGE_MEM64_DECODE) != 0 ? L"Mem64Decode" : L"" @@ -155,6 +156,7 @@ CreateRootBridge ( RootBridge->Supports = Bridge->Supports; RootBridge->Attributes = Bridge->Attributes; RootBridge->DmaAbove4G = Bridge->DmaAbove4G; + RootBridge->ExtendedConfigSpace = Bridge->ExtendedConfigSpace; RootBridge->AllocationAttributes = Bridge->AllocationAttributes; RootBridge->DevicePath = DuplicateDevicePath (Bridge->DevicePath); RootBridge->DevicePathStr = DevicePathStr; @@ -351,7 +353,7 @@ RootBridgeIoCheckParameter ( Address = PciRbAddr->Register; } Base = 0; - Limit = 0xFFF; + Limit = RootBridge->ExtendedConfigSpace ? 0xFFF : 0xFF; } if (Address < Base) { -- 1.8.3.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel