Re: [Patch V2 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation
From: Will Deacon <will@kernel.org>
Date: 2021-08-02 15:16:23
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linux-iommu, lkml
On Fri, Jun 18, 2021 at 02:00:35AM +0530, Ashish Mhetre wrote:
Multiple iommu domains and iommu groups are getting created for the devices sharing same SID. It is expected for devices sharing same SID to be in same iommu group and same iommu domain. This is leading to context faults when one device is accessing IOVA from other device which shouldn't be the case for devices sharing same SID. Fix this by protecting iommu domain and iommu group creation with mutexes.
Robin -- any chance you could take a look at these, please? You had some comments on the first version which convinced me that they are needed, but I couldn't tell whether you wanted to solve this a different way or not. Cheers, Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel