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Date:   Wed, 15 Jul 2020 11:17:20 +0200
From:   Joerg Roedel <joro@8bytes.org>
To:     "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Cc:     Joerg Roedel <jroedel@suse.de>, Andy Gross <agross@kernel.org>,
        Lu Baolu <baolu.lu@linux.intel.com>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Daniel Drake <drake@endlessm.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Gerald Schaefer <gerald.schaefer@de.ibm.com>,
        Christoph Hellwig <hch@lst.de>,
        Heiko Stuebner <heiko@sntech.de>,
        Jean-Philippe Brucker <jean-philippe@linaro.org>,
        jonathan.derrick@intel.com, Jonathan Hunter <jonathanh@nvidia.com>,
        Kukjin Kim <kgene@kernel.org>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
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        linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        David Rientjes <rientjes@google.com>,
        Rob Clark <robdclark@gmail.com>,
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        Thierry Reding <thierry.reding@gmail.com>,
        virtualization@lists.linux-foundation.org,
        Will Deacon <will@kernel.org>
Subject: Re: AMD IOMMU + SME + amdgpu regression
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On Mon, Jun 22, 2020 at 11:30:04AM -0400, Alex Xu (Hello71) wrote:
> Yes, it works with SME off with dbed452a078 ("dma-pool: decouple 
> DMA_REMAP from DMA_COHERENT_POOL") applied.

Okay, I can reproduce the problem on my Ryzen System, and the boot log
shows various warnings/bugs from the amdgpu driver. I think this should
be looked at by the AMDGPU folks first, as I didn't really got far
looking into the GPU drivers code.

Regards,

	Joerg