linux-kernel - AMD SME fails boot after "dma-mapping: direct calls for dma-iommu"

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Message-Id: <1727103770.hoytxrqcmg.none@localhost>
Date: Mon, 23 Sep 2024 11:09:32 -0400
From: "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
To: Leon Romanovsky <leon@...nel.org>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Christoph Hellwig <hch@....de>,
	iommu@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org
Subject: AMD SME fails boot after "dma-mapping: direct calls for dma-iommu"

Hi all,

Recently on torvalds master my ASRock B450 Pro4 with Ryzen 1600 cannot 
boot with mem_encrypt=on. Bisect blames "dma-mapping: direct calls for 
dma-iommu".

Let me know what further information is needed to troubleshoot this 
issue.

Thanks,
Alex.