Re: AMD IOMMU + SME + amdgpu regression
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
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Re: AMD IOMMU + SME + amdgpu regression
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-pool: decouple
DMA_REMAP from DMA_COHERENT_POOL") applied.
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Re: AMD IOMMU + SME + amdgpu regression
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 ___ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
AMD IOMMU + SME + amdgpu regression
Hi, amdgpu + IOMMU + SME is now working for me on 5.7, yay! But, it is broken on torvalds master, boo. On boot, depending on which exact commit I test, it either hangs immediately (with built-in driver, before starting initramfs), displays some errors then hangs, or spams the screen with many amdgpu errors. I bisected the black screen hang to: commit dce8d6964ebdb83bacf5e7ab8c27df151218 Author: Joerg Roedel Date: Wed Apr 29 15:36:53 2020 +0200 iommu/amd: Convert to probe/release_device() call-backs Convert the AMD IOMMU Driver to use the probe_device() and release_device() call-backs of iommu_ops, so that the iommu core code does the group and sysfs setup. Signed-off-by: Joerg Roedel Link: https://lore.kernel.org/r/20200429133712.31431-16-j...@8bytes.org Signed-off-by: Joerg Roedel Testing torvalds master (623f6dc593) with the containing 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. ___ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
