a397373cea
Add support for HSA_ENABLE_PEER_SDMA env variable that can be used to disable use of SDMA engines for device-to-device transfers. Note that setting HSA_ENABLE_SDMA=0 will disable all SDMA transfers and override HSA_ENABLE_PEER_SDMA values. Change-Id: I737b3c2b2efcf3ff237f98bc748f49b8252ed24a