From: Joerg Roedel <joro@8bytes.org> To: iommu@lists.linux-foundation.org Cc: Joerg Roedel <joro@8bytes.org>, jroedel@suse.de, Tom Lendacky <thomas.lendacky@amd.com>, Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>, Alexander.Deucher@amd.com, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is active Date: Mon, 24 Aug 2020 12:54:13 +0200 [thread overview] Message-ID: <20200824105415.21000-1-joro@8bytes.org> (raw) From: Joerg Roedel <jroedel@suse.de> Hi, Some IOMMUv2 capable devices do not work correctly when SME is active, because their DMA mask does not include the encryption bit, so that they can not DMA to encrypted memory directly. The IOMMU can jump in here, but the AMD IOMMU driver puts IOMMUv2 capable devices into an identity mapped domain. Fix that by not forcing an identity mapped domain on devices when SME is active and forbid using their IOMMUv2 functionality. Please review. Thanks, Joerg Joerg Roedel (2): iommu/amd: Do not force direct mapping when SME is active iommu/amd: Do not use IOMMUv2 functionality when SME is active drivers/iommu/amd/iommu.c | 7 ++++++- drivers/iommu/amd/iommu_v2.c | 7 +++++++ 2 files changed, 13 insertions(+), 1 deletion(-) -- 2.28.0
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org> To: iommu@lists.linux-foundation.org Cc: Tom Lendacky <thomas.lendacky@amd.com>, jroedel@suse.de, linux-kernel@vger.kernel.org, Alexander.Deucher@amd.com Subject: [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is active Date: Mon, 24 Aug 2020 12:54:13 +0200 [thread overview] Message-ID: <20200824105415.21000-1-joro@8bytes.org> (raw) From: Joerg Roedel <jroedel@suse.de> Hi, Some IOMMUv2 capable devices do not work correctly when SME is active, because their DMA mask does not include the encryption bit, so that they can not DMA to encrypted memory directly. The IOMMU can jump in here, but the AMD IOMMU driver puts IOMMUv2 capable devices into an identity mapped domain. Fix that by not forcing an identity mapped domain on devices when SME is active and forbid using their IOMMUv2 functionality. Please review. Thanks, Joerg Joerg Roedel (2): iommu/amd: Do not force direct mapping when SME is active iommu/amd: Do not use IOMMUv2 functionality when SME is active drivers/iommu/amd/iommu.c | 7 ++++++- drivers/iommu/amd/iommu_v2.c | 7 +++++++ 2 files changed, 13 insertions(+), 1 deletion(-) -- 2.28.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next reply other threads:[~2020-08-24 10:55 UTC|newest] Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-08-24 10:54 Joerg Roedel [this message] 2020-08-24 10:54 ` [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is active Joerg Roedel 2020-08-24 10:54 ` [PATCH 1/2] iommu/amd: Do not force direct mapping " Joerg Roedel 2020-08-24 10:54 ` Joerg Roedel 2020-08-26 14:23 ` Deucher, Alexander 2020-08-26 14:23 ` Deucher, Alexander 2020-08-24 10:54 ` [PATCH 2/2] iommu/amd: Do not use IOMMUv2 functionality " Joerg Roedel 2020-08-24 10:54 ` Joerg Roedel 2020-08-26 14:20 ` Deucher, Alexander 2020-08-26 14:20 ` Deucher, Alexander 2020-08-26 14:14 ` [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices " Deucher, Alexander 2020-08-26 15:22 ` Felix Kuehling 2020-08-26 15:22 ` Felix Kuehling 2020-08-26 15:25 ` Deucher, Alexander 2020-08-26 15:25 ` Deucher, Alexander 2020-08-28 13:46 ` jroedel 2020-08-28 13:46 ` jroedel 2020-08-28 13:54 ` Felix Kuehling 2020-08-28 13:54 ` Felix Kuehling 2020-08-28 15:11 ` Deucher, Alexander 2020-08-28 15:11 ` Deucher, Alexander 2020-08-28 15:29 ` jroedel 2020-08-28 15:29 ` jroedel 2020-08-28 15:47 ` Deucher, Alexander 2020-08-28 15:47 ` Deucher, Alexander 2020-09-04 10:05 ` Joerg Roedel 2020-09-04 10:05 ` Joerg Roedel 2020-09-06 16:08 ` Deucher, Alexander 2020-09-06 16:08 ` Deucher, Alexander 2020-09-07 10:44 ` Joerg Roedel 2020-09-07 10:44 ` Joerg Roedel 2020-09-07 11:10 ` Christian König 2020-09-07 11:10 ` Christian König 2020-09-08 3:38 ` Felix Kuehling 2020-09-08 3:38 ` Felix Kuehling 2020-08-28 15:27 ` jroedel 2020-08-28 15:27 ` jroedel
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