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...ontaining merge (98bdc74b36) plus the DMA mapping merge (4e94d08734) reverted allows amdgpu + IOMMU + SME to once again work. I think that nobody is really working on amdgpu + SME, but it would be a shame if it was supported and then incidentally broken by a small change. 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. Thanks, Alex.

...ontaining merge (98bdc74b36) plus the DMA mapping merge (4e94d08734) reverted allows amdgpu + IOMMU + SME to once again work. I think that nobody is really working on amdgpu + SME, but it would be a shame if it was supported and then incidentally broken by a small change. 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. Thanks, Alex.

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

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-po...

...11D6 BE6B 00108365A7E7 CLIENT IP: 192.168.102.151 MASK: 255.255.255.0 DHCP IP: 192.168.102.150 GATEWAY IP: 192.168.102.1 PXELINUX 1.66 2002-01-01 Copyright (C) 1994-2002 H. PXELINUX 1.66 2002-01-01 Copyright (C) 1994-2002 H. Peter Anvin UNDI data segment at: 00090D40 UNDI data segment size: B450 UNDI code segment at: 0009C190 UNDI code segment size: 30E0 PXE entry point found (we hope) at 9C19:0106 My IP address seems to be C0A86697 192.168.102.151 ip=192.168.102.151:192.168.102.150:192.168.102.1:255.255.255.0 TFTP prefix: Trying to load: pxelinux.cfg/C0A86697 Trying to load: pxelinux.cf...

I performed an experiment in which I had dhcpd specify a named file ("foo") instead of one based on a client's MAC address. Lo and behold, the same problem occured. The PXE stack requested and was served the right file, the kernel loaded as did the initrd. But again, the boot sequence stopped at "Ready." Keep in mind that the contents of the file are the same as was in the