Messages in this thread | | | Date | Wed, 30 Mar 2022 10:55:27 -0700 | From | Christoph Hellwig <> | Subject | Re: "dma-mapping: remove CONFIG_DMA_REMAP" causes AMD SME boot fail |
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On Wed, Mar 30, 2022 at 01:51:07PM -0400, Alex Xu (Hello71) wrote: > Hi, > > After a recent kernel update, booting one of my machines causes it to > hang on a black screen. Pressing Lock keys on the USB keyboard does not > turn on the indicators, and the machine does not appear on the Ethernet > network. I don't have a serial port on this machine. I didn't try > netconsole, but I suspect it won't work. > > Setting mem_encrypt=0 seems to resolve the issue. Reverting f5ff79fddf0e > ("dma-mapping: remove CONFIG_DMA_REMAP") also appears to resolve the > issue. > > The machine in question has an AMD Ryzen 5 1600 and ASRock B450 Pro4.
This looks like something in the AMD IOMMU code or it's users can't deal with vmalloc addresses. I'll start looking for a culprit ASAP.
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