Reviewed-by: Ruiyu Ni <ruiyu...@intel.com>
>-----Original Message----- >From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of Laszlo >Ersek >Sent: Saturday, February 27, 2016 8:24 AM >To: edk2-devel-01 <edk2-de...@ml01.01.org> >Cc: Ni, Ruiyu <ruiyu...@intel.com>; Justen, Jordan L ><jordan.l.jus...@intel.com>; Marcel Apfelbaum <mar...@redhat.com> >Subject: [edk2] [PATCH 11/17] OvmfPkg: PciHostBridgeLib: clear >RootBus->DmaAbove4G > >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.jus...@intel.com> >Cc: Ruiyu Ni <ruiyu...@intel.com> >Cc: Marcel Apfelbaum <mar...@redhat.com> >Contributed-under: TianoCore Contribution Agreement 1.0 >Signed-off-by: Laszlo Ersek <ler...@redhat.com> >--- > OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c | 2 ++ > 1 file changed, 2 insertions(+) > >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; > } > >-- >1.8.3.1 > > >_______________________________________________ >edk2-devel mailing list >edk2-devel@lists.01.org >https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
