From: Will Deacon <will@kernel.org>
To: Ashish Mhetre <amhetre@nvidia.com>
Cc: robin.murphy@arm.com, vdumpa@nvidia.com,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Patch V2 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation
Date: Mon, 2 Aug 2021 16:16:07 +0100 [thread overview]
Message-ID: <20210802151607.GF28735@willie-the-truck> (raw)
In-Reply-To: <1623961837-12540-1-git-send-email-amhetre@nvidia.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: Ashish Mhetre <amhetre@nvidia.com>
Cc: robin.murphy@arm.com, iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [Patch V2 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation
Date: Mon, 2 Aug 2021 16:16:07 +0100 [thread overview]
Message-ID: <20210802151607.GF28735@willie-the-truck> (raw)
In-Reply-To: <1623961837-12540-1-git-send-email-amhetre@nvidia.com>
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
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: Ashish Mhetre <amhetre@nvidia.com>
Cc: robin.murphy@arm.com, iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [Patch V2 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation
Date: Mon, 2 Aug 2021 16:16:07 +0100 [thread overview]
Message-ID: <20210802151607.GF28735@willie-the-truck> (raw)
In-Reply-To: <1623961837-12540-1-git-send-email-amhetre@nvidia.com>
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
next prev parent reply other threads:[~2021-08-02 15:16 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-17 20:30 [Patch V2 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation Ashish Mhetre
2021-06-17 20:30 ` Ashish Mhetre
2021-06-17 20:30 ` Ashish Mhetre
2021-06-17 20:30 ` [Patch V2 1/2] iommu: Fix race condition during default domain allocation Ashish Mhetre
2021-06-17 20:30 ` Ashish Mhetre
2021-06-17 20:30 ` Ashish Mhetre
2021-06-17 20:30 ` [Patch V2 2/2] iommu/arm-smmu: Fix race condition during iommu_group creation Ashish Mhetre
2021-06-17 20:30 ` Ashish Mhetre
2021-06-17 20:30 ` Ashish Mhetre
2021-07-15 4:44 ` [Patch V2 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation Ashish Mhetre
2021-07-15 4:44 ` Ashish Mhetre
2021-07-15 4:44 ` Ashish Mhetre via iommu
2021-08-02 15:16 ` Will Deacon [this message]
2021-08-02 15:16 ` Will Deacon
2021-08-02 15:16 ` Will Deacon
2021-08-02 15:46 ` Robin Murphy
2021-08-02 15:46 ` Robin Murphy
2021-08-02 15:46 ` Robin Murphy
2021-08-09 14:54 ` Will Deacon
2021-08-09 14:54 ` Will Deacon
2021-08-09 14:54 ` Will Deacon
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