Excerpts from Joerg Roedel's message of June 22, 2020 6:02 am: > Hi Alex, > > On Thu, Jun 11, 2020 at 07:05:21PM -0400, Alex Xu (Hello71) wrote: >> I am using an ASRock B450 Pro4 with Ryzen 1600 and ASUS RX 480. I don't >> understand this code at all, but let me know what I can do to >> troubleshoot. > > Does it boot without SME enabled? > > > Regards, > > Joerg > Yes, it works with SME off with dbed452a078 ("dma-pool: decouple DMA_REMAP from DMA_COHERENT_POOL") applied.