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Kabini is not supported by KFD. There should be no calls to amd_iommu_... functions on Kabini, at least not from kfd_iommu.c. And I'm not aware of any other callers in amdgpu.ko. 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Received: from BN9PR12MB5115.namprd12.prod.outlook.com (2603:10b6:408:118::14) by MW4PR12MB6898.namprd12.prod.outlook.com (2603:10b6:303:207::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5986.18; Tue, 10 Jan 2023 15:05:47 +0000 Received: from BN9PR12MB5115.namprd12.prod.outlook.com ([fe80::c3f5:aede:fa4d:5411]) by BN9PR12MB5115.namprd12.prod.outlook.com ([fe80::c3f5:aede:fa4d:5411%5]) with mapi id 15.20.5986.018; Tue, 10 Jan 2023 15:05:47 +0000 Message-ID: Date: Tue, 10 Jan 2023 10:05:44 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: =?UTF-8?Q?Re=3a_=5bregression=2c_bisected=2c_pci/iommu=5d_Bug=c2=a0?= =?UTF-8?Q?216865_-_Black_screen_when_amdgpu_started_during_6=2e2-rc1_boot_w?= =?UTF-8?Q?ith_AMD_IOMMU_enabled?= Content-Language: en-US To: =?UTF-8?Q?Christian_K=c3=b6nig?= , Jason Gunthorpe , Baolu Lu , Alex Deucher , "Pan, Xinhui" Cc: Joerg Roedel , "regressions@lists.linux.dev" , Thorsten Leemhuis , Linux PCI , Vasant Hegde , amd-gfx@lists.freedesktop.org, LKML , "iommu@lists.linux.dev" , Matt Fagnani , Bjorn Helgaas References: <15d0f9ff-2a56-b3e9-5b45-e6b23300ae3b@leemhuis.info> <5aa0e698-f715-0481-36e5-46505024ebc1@bell.net> <157c4ca4-370a-5d7e-fe32-c64d934f6979@amd.com> <223ee6d6-70ea-1d53-8bc2-2d22201d8dde@bell.net> <6fff9d10-f77f-e55a-9020-8a1bd34cf508@amd.com> <2d1b2183-7e93-f8a5-3c74-8f66824bc8f2@amd.com> From: Felix Kuehling In-Reply-To: <2d1b2183-7e93-f8a5-3c74-8f66824bc8f2@amd.com> Content-Type: text/plain; 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Kabini is not supported by KFD. There should be no calls to amd_iommu_... functions on Kabini, at least not from kfd_iommu.c. And I'm not aware of any other callers in amdgpu.ko. Regards,   Felix