This patch provides an abstraction layer for Bus-master DMA operations as currently implemented by the PciHostBridgeDxe driver. The intent is to then allow override of this library as may be required by specific hardware implementations, such as AMD's Secure Encrypted Virtualization (SEV).
This new (BmDmaLib class) library is cloned from the existing DmaLib with an additional DmaAbove4GB (BOOLEAN) parameter for the Map and Allocate interfaces, so that decisions can be made about the need to allocate DMA buffers below the 4GB boundary. --- MdeModulePkg/MdeModulePkg.dsc | 1 + 1 file changed, 1 insertion(+) diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc index 5996fe5..311922e 100644 --- a/MdeModulePkg/MdeModulePkg.dsc +++ b/MdeModulePkg/MdeModulePkg.dsc @@ -275,6 +275,7 @@ [Components] MdeModulePkg/Core/Pei/PeiMain.inf MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf + MdeModulePkg/Library/DxeBmDmaLib/DxeBmDmaLib.inf MdeModulePkg/Library/DxeCapsuleLibNull/DxeCapsuleLibNull.inf MdeModulePkg/Library/UefiMemoryAllocationProfileLib/UefiMemoryAllocationProfileLib.inf MdeModulePkg/Library/DxeCoreMemoryAllocationLib/DxeCoreMemoryAllocationLib.inf -- 1.9.1 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
