Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled

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Subject: Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
From: Felix Kuehling <felix.kuehling@xxxxxxx>
Date: Tue, 10 Jan 2023 10:05:44 -0500
Cc: Joerg Roedel <jroedel@xxxxxxx>, "regressions@xxxxxxxxxxxxxxx" <regressions@xxxxxxxxxxxxxxx>, Thorsten Leemhuis <regressions@xxxxxxxxxxxxx>, Linux PCI <linux-pci@xxxxxxxxxxxxxxx>, Vasant Hegde <vasant.hegde@xxxxxxx>, amd-gfx@xxxxxxxxxxxxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>, "iommu@xxxxxxxxxxxxxxx" <iommu@xxxxxxxxxxxxxxx>, Matt Fagnani <matt.fagnani@xxxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
In-reply-to: <2d1b2183-7e93-f8a5-3c74-8f66824bc8f2@amd.com>
References: <15d0f9ff-2a56-b3e9-5b45-e6b23300ae3b@leemhuis.info> <5aa0e698-f715-0481-36e5-46505024ebc1@bell.net> <aea57c5f-2d20-c589-ad44-a63f1133a3db@linux.intel.com> <157c4ca4-370a-5d7e-fe32-c64d934f6979@amd.com> <223ee6d6-70ea-1d53-8bc2-2d22201d8dde@bell.net> <6fff9d10-f77f-e55a-9020-8a1bd34cf508@amd.com> <Y7gs0zYKp/VXACBi@nvidia.com> <f96b1cf3-6865-663d-f1cd-466a71519b08@linux.intel.com> <Y71nZuF5wQp3eqmn@nvidia.com> <2d1b2183-7e93-f8a5-3c74-8f66824bc8f2@amd.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2

Am 2023-01-10 um 08:45 schrieb Christian König:

And I'm like 99% sure that Kabini/Wani should be identical to that.

Kabini is not supported by KFD. There should be no calls toamd_iommu_... functions on Kabini, at least not from kfd_iommu.c. AndI'm not aware of any other callers in amdgpu.ko.


Regards,
  Felix

Follow-Ups:
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Jason Gunthorpe

References:
- [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Thorsten Leemhuis
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Baolu Lu
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Vasant Hegde
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Matt Fagnani
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Vasant Hegde
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Jason Gunthorpe
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Baolu Lu
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Jason Gunthorpe
- Re: [regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled
  - From: Christian König

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