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MdeModulePkg: PciHostBridgeDxe: don't assume extended config space 

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.ni@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
This commit is contained in:
Laszlo Ersek 2016-02-26 23:09:46 +01:00
parent 3da829657e
commit 014b472053
3 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h
View File

@ -72,6 +72,7 @@ typedef struct {
PCI_ROOT_BRIDGE_APERTURE MemAbove4G;
PCI_ROOT_BRIDGE_APERTURE PMemAbove4G;
BOOLEAN DmaAbove4G;
BOOLEAN NoExtendedConfigSpace;
VOID *ConfigBuffer;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
CHAR16 *DevicePathStr;

4
MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
View File

@ -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, "NoExtConfSpace: %s\n", Bridge->NoExtendedConfigSpace ? 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->NoExtendedConfigSpace = Bridge->NoExtendedConfigSpace;
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->NoExtendedConfigSpace ? 0xFF : 0xFFF;
}
if (Address < Base) {

4
MdeModulePkg/Include/Library/PciHostBridgeLib.h
View File

@ -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 NoExtendedConfigSpace; ///< When FALSE, the root bridge supports
///< Extended (4096-byte) Configuration Space.
///< When TRUE, 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()