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From: "Alex Xu (Hello71)" <>
To: Christoph Hellwig <>,
Subject: "dma-mapping: remove CONFIG_DMA_REMAP" causes AMD SME boot fail
Date: Wed, 30 Mar 2022 13:51:07 -0400	[thread overview]
Message-ID: <1648659326.eabkokyuym.none@localhost> (raw)
In-Reply-To: 1648659326.eabkokyuym.none.ref@localhost


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 

The machine in question has an AMD Ryzen 5 1600 and ASRock B450 Pro4.


       reply	other threads:[~2022-03-30 17:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1648659326.eabkokyuym.none.ref@localhost>
2022-03-30 17:51 ` Alex Xu (Hello71) [this message]
2022-03-30 17:55   ` "dma-mapping: remove CONFIG_DMA_REMAP" causes AMD SME boot fail Christoph Hellwig
2022-03-30 18:01   ` Christoph Hellwig
2022-03-30 19:17     ` Alex Xu (Hello71)
2022-03-31  4:08       ` Christoph Hellwig
2022-03-31  6:51   ` Thorsten Leemhuis
2022-04-15 17:58     ` "dma-mapping: remove CONFIG_DMA_REMAP" causes AMD SME boot fail #forregzbot Thorsten Leemhuis

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