From: Jason Gunthorpe <jgg@nvidia.com>
To: Mostafa Saleh <smostafa@google.com>
Cc: iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>,
Will Deacon <will@kernel.org>,
Lu Baolu <baolu.lu@linux.intel.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Joerg Roedel <jroedel@suse.de>, Moritz Fischer <mdf@kernel.org>,
Moritz Fischer <moritzf@google.com>,
Michael Shavit <mshavit@google.com>,
Nicolin Chen <nicolinc@nvidia.com>,
patches@lists.linux.dev,
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>,
Zhangfei Gao <zhangfei.gao@linaro.org>
Subject: Re: [PATCH v5 06/17] iommu/arm-smmu-v3: Hold arm_smmu_asid_lock during all of attach_dev
Date: Tue, 13 Feb 2024 12:18:58 -0400 [thread overview]
Message-ID: <20240213161858.GC1088888@nvidia.com> (raw)
In-Reply-To: <ZcuNESWmrC9jZ9lM@google.com>
On Tue, Feb 13, 2024 at 03:38:57PM +0000, Mostafa Saleh wrote:
> This seems a bit theoretical to me also it requires mis-programming as the master
> will issue DMA in detach
iommufd allows VFIO userspace to do this workload as an attack on the
kernel.
Thanks,
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: Mostafa Saleh <smostafa@google.com>
Cc: iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>,
Will Deacon <will@kernel.org>,
Lu Baolu <baolu.lu@linux.intel.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Joerg Roedel <jroedel@suse.de>, Moritz Fischer <mdf@kernel.org>,
Moritz Fischer <moritzf@google.com>,
Michael Shavit <mshavit@google.com>,
Nicolin Chen <nicolinc@nvidia.com>,
patches@lists.linux.dev,
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>,
Zhangfei Gao <zhangfei.gao@linaro.org>
Subject: Re: [PATCH v5 06/17] iommu/arm-smmu-v3: Hold arm_smmu_asid_lock during all of attach_dev
Date: Tue, 13 Feb 2024 12:18:58 -0400 [thread overview]
Message-ID: <20240213161858.GC1088888@nvidia.com> (raw)
In-Reply-To: <ZcuNESWmrC9jZ9lM@google.com>
On Tue, Feb 13, 2024 at 03:38:57PM +0000, Mostafa Saleh wrote:
> This seems a bit theoretical to me also it requires mis-programming as the master
> will issue DMA in detach
iommufd allows VFIO userspace to do this workload as an attack on the
kernel.
Thanks,
Jason
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next prev parent reply other threads:[~2024-02-13 16:19 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-06 15:12 [PATCH v5 00/17] Update SMMUv3 to the modern iommu API (part 1/3) Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 01/17] iommu/arm-smmu-v3: Make STE programming independent of the callers Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-15 13:49 ` Will Deacon
2024-02-15 13:49 ` Will Deacon
2024-02-15 16:01 ` Jason Gunthorpe
2024-02-15 16:01 ` Jason Gunthorpe
2024-02-15 18:42 ` Robin Murphy
2024-02-15 18:42 ` Robin Murphy
2024-02-15 20:11 ` Robin Murphy
2024-02-15 20:11 ` Robin Murphy
2024-02-16 16:28 ` Will Deacon
2024-02-16 16:28 ` Will Deacon
2024-02-15 21:17 ` Jason Gunthorpe
2024-02-15 21:17 ` Jason Gunthorpe
2024-02-21 13:49 ` Will Deacon
2024-02-21 13:49 ` Will Deacon
2024-02-21 14:08 ` Jason Gunthorpe
2024-02-21 14:08 ` Jason Gunthorpe
2024-02-21 16:19 ` Michael Shavit
2024-02-21 16:19 ` Michael Shavit
2024-02-21 16:52 ` Michael Shavit
2024-02-21 16:52 ` Michael Shavit
2024-02-21 17:06 ` Jason Gunthorpe
2024-02-21 17:06 ` Jason Gunthorpe
2024-02-22 17:43 ` Will Deacon
2024-02-22 17:43 ` Will Deacon
2024-02-23 15:18 ` Jason Gunthorpe
2024-02-23 15:18 ` Jason Gunthorpe
2024-02-27 12:43 ` Will Deacon
2024-02-27 12:43 ` Will Deacon
2024-02-29 13:57 ` Jason Gunthorpe
2024-02-29 13:57 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 02/17] iommu/arm-smmu-v3: Consolidate the STE generation for abort/bypass Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-15 17:27 ` Robin Murphy
2024-02-15 17:27 ` Robin Murphy
2024-02-22 17:40 ` Will Deacon
2024-02-22 17:40 ` Will Deacon
2024-02-23 18:53 ` Jason Gunthorpe
2024-02-23 18:53 ` Jason Gunthorpe
2024-02-27 10:50 ` Will Deacon
2024-02-27 10:50 ` Will Deacon
2024-02-06 15:12 ` [PATCH v5 03/17] iommu/arm-smmu-v3: Move arm_smmu_rmr_install_bypass_ste() Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-13 15:37 ` Mostafa Saleh
2024-02-13 15:37 ` Mostafa Saleh
2024-02-13 16:16 ` Jason Gunthorpe
2024-02-13 16:16 ` Jason Gunthorpe
2024-02-13 16:46 ` Mostafa Saleh
2024-02-13 16:46 ` Mostafa Saleh
2024-02-15 19:01 ` Robin Murphy
2024-02-15 19:01 ` Robin Murphy
2024-02-15 21:18 ` Jason Gunthorpe
2024-02-15 21:18 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 04/17] iommu/arm-smmu-v3: Move the STE generation for S1 and S2 domains into functions Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-16 17:12 ` Jason Gunthorpe
2024-02-16 17:12 ` Jason Gunthorpe
2024-02-16 17:39 ` Will Deacon
2024-02-16 17:39 ` Will Deacon
2024-02-16 17:58 ` Jason Gunthorpe
2024-02-16 17:58 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 05/17] iommu/arm-smmu-v3: Build the whole STE in arm_smmu_make_s2_domain_ste() Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 06/17] iommu/arm-smmu-v3: Hold arm_smmu_asid_lock during all of attach_dev Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-13 15:38 ` Mostafa Saleh
2024-02-13 15:38 ` Mostafa Saleh
2024-02-13 16:18 ` Jason Gunthorpe [this message]
2024-02-13 16:18 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 07/17] iommu/arm-smmu-v3: Compute the STE only once for each master Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 08/17] iommu/arm-smmu-v3: Do not change the STE twice during arm_smmu_attach_dev() Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-13 15:40 ` Mostafa Saleh
2024-02-13 15:40 ` Mostafa Saleh
2024-02-13 16:26 ` Jason Gunthorpe
2024-02-13 16:26 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 09/17] iommu/arm-smmu-v3: Put writing the context descriptor in the right order Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-13 15:42 ` Mostafa Saleh
2024-02-13 15:42 ` Mostafa Saleh
2024-02-13 17:50 ` Jason Gunthorpe
2024-02-13 17:50 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 10/17] iommu/arm-smmu-v3: Pass smmu_domain to arm_enable/disable_ats() Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-13 15:43 ` Mostafa Saleh
2024-02-13 15:43 ` Mostafa Saleh
2024-02-06 15:12 ` [PATCH v5 11/17] iommu/arm-smmu-v3: Remove arm_smmu_master->domain Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-13 15:45 ` Mostafa Saleh
2024-02-13 15:45 ` Mostafa Saleh
2024-02-13 16:37 ` Jason Gunthorpe
2024-02-13 16:37 ` Jason Gunthorpe
2024-02-13 17:00 ` Mostafa Saleh
2024-02-13 17:00 ` Mostafa Saleh
2024-02-06 15:12 ` [PATCH v5 12/17] iommu/arm-smmu-v3: Check that the RID domain is S1 in SVA Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 13/17] iommu/arm-smmu-v3: Add a global static IDENTITY domain Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 14/17] iommu/arm-smmu-v3: Add a global static BLOCKED domain Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 15/17] iommu/arm-smmu-v3: Use the identity/blocked domain during release Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 16/17] iommu/arm-smmu-v3: Pass arm_smmu_domain and arm_smmu_device to finalize Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-06 15:12 ` [PATCH v5 17/17] iommu/arm-smmu-v3: Convert to domain_alloc_paging() Jason Gunthorpe
2024-02-06 15:12 ` Jason Gunthorpe
2024-02-07 5:27 ` [PATCH v5 00/17] Update SMMUv3 to the modern iommu API (part 1/3) Nicolin Chen
2024-02-07 5:27 ` Nicolin Chen
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