| Message ID | 1456532616-32475-12-git-send-email-lersek@redhat.com |
|---|---|
| State | Superseded |
| Headers | show |
diff --git a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c index d7b01114c4aa..ba08c9b43b54 100644 --- a/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c +++ b/OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c @@ -84,6 +84,8 @@ InitRootBridge ( EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO_16; RootBus->Attributes = RootBus->Supports; + RootBus->DmaAbove4G = FALSE; + return EFI_OUT_OF_RESOURCES; }
When this BOOLEAN member is FALSE, and the caller tries to set up a DMA transfer between a PCI device and a host buffer not entirely under 4GB, then "MdeModulePkg/Bus/Pci/PciHostBridgeDxe" sets up a bounce buffer under 4GB, in the implementation of EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.Map(). Since that's exactly what RootBridgeIoMap() does in "OvmfPkg/PciHostBridgeDxe/PciRootBridgeIo.c", stick with it in this conversion. 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> --- OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c | 2 ++ 1 file changed, 2 insertions(+) -- 1.8.3.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel