From: Baolu Lu <baolu.lu@linux.intel.com>
To: Jason Gunthorpe <jgg@nvidia.com>,
iommu@lists.linux.dev, Kevin Tian <kevin.tian@intel.com>,
linux-kselftest@vger.kernel.org
Cc: baolu.lu@linux.intel.com, kvm@vger.kernel.org,
Nicolin Chen <nicolinc@nvidia.com>, Yi Liu <yi.l.liu@intel.com>
Subject: Re: [PATCH v2 12/17] iommufd: Add iommufd_device_replace()
Date: Thu, 9 Mar 2023 09:14:29 +0800 [thread overview]
Message-ID: <94a68384-0541-affb-fb52-9644312c4b95@linux.intel.com> (raw)
In-Reply-To: <12-v2-51b9896e7862+8a8c-iommufd_alloc_jgg@nvidia.com>
On 3/8/23 8:35 AM, Jason Gunthorpe wrote:
> Replace allows all the devices in a group to move in one step to a new
> HWPT. Further, the HWPT move is done without going through a blocking
> domain so that the IOMMU driver can implement some level of
> non-distruption to ongoing DMA if that has meaning for it (eg for future
> special driver domains)
>
> Replace uses a lot of the same logic as normal attach, except the actual
> domain change over has different restrictions, and we are careful to
> sequence things so that failure is going to leave everything the way it
> was, and not get trapped in a blocking domain or something if there is
> ENOMEM.
>
> Signed-off-by: Jason Gunthorpe<jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Best regards,
baolu
next prev parent reply other threads:[~2023-03-09 1:15 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-08 0:35 [PATCH v2 00/17] Add iommufd physical device operations for replace and alloc hwpt Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 01/17] iommufd: Move isolated msi enforcement to iommufd_device_bind() Jason Gunthorpe
2023-03-08 2:55 ` Baolu Lu
2023-03-09 12:53 ` Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 02/17] iommufd: Add iommufd_group Jason Gunthorpe
2023-03-08 3:18 ` Baolu Lu
2023-03-09 15:51 ` Jason Gunthorpe
2023-03-10 10:30 ` Tian, Kevin
2023-03-08 0:35 ` [PATCH v2 03/17] iommufd: Replace the hwpt->devices list with iommufd_group Jason Gunthorpe
2023-03-08 11:56 ` Baolu Lu
2023-03-10 10:36 ` Tian, Kevin
2023-03-10 14:16 ` Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 04/17] iommu: Export iommu_get_resv_regions() Jason Gunthorpe
2023-03-08 12:06 ` Baolu Lu
2023-03-08 14:54 ` Jason Gunthorpe
2023-03-10 10:40 ` Tian, Kevin
2023-03-08 0:35 ` [PATCH v2 05/17] iommufd: Keep track of each device's reserved regions instead of groups Jason Gunthorpe
2023-03-08 12:32 ` Baolu Lu
2023-03-08 15:02 ` Jason Gunthorpe
2023-03-09 1:43 ` Baolu Lu
2023-03-10 10:42 ` Tian, Kevin
2023-03-08 0:35 ` [PATCH v2 06/17] iommufd: Use the iommufd_group to avoid duplicate MSI setup Jason Gunthorpe
2023-03-10 10:42 ` Tian, Kevin
2023-03-08 0:35 ` [PATCH v2 07/17] iommufd: Make sw_msi_start a group global Jason Gunthorpe
2023-03-10 10:45 ` Tian, Kevin
2023-03-08 0:35 ` [PATCH v2 08/17] iommufd: Move putting a hwpt to a helper function Jason Gunthorpe
2023-03-08 12:42 ` Baolu Lu
2023-03-10 10:45 ` Tian, Kevin
2023-03-08 0:35 ` [PATCH v2 09/17] iommufd: Add enforced_cache_coherency to iommufd_hw_pagetable_alloc() Jason Gunthorpe
2023-03-08 13:04 ` Baolu Lu
2023-03-08 15:06 ` Jason Gunthorpe
2023-03-09 2:03 ` Baolu Lu
2023-03-09 2:05 ` Baolu Lu
2023-03-08 0:35 ` [PATCH v2 10/17] iommufd: Reorganize iommufd_device_attach into iommufd_device_change_pt Jason Gunthorpe
2023-03-08 13:46 ` Baolu Lu
2023-03-10 11:26 ` Tian, Kevin
2023-03-10 15:01 ` Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 11/17] iommu: Introduce a new iommu_group_replace_domain() API Jason Gunthorpe
2023-03-08 13:48 ` Baolu Lu
2023-03-08 0:35 ` [PATCH v2 12/17] iommufd: Add iommufd_device_replace() Jason Gunthorpe
2023-03-09 1:14 ` Baolu Lu [this message]
2023-03-10 11:48 ` Tian, Kevin
2023-03-10 15:04 ` Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 13/17] iommufd: Make destroy_rwsem use a lock class per object type Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 14/17] iommufd/selftest: Test iommufd_device_replace() Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 15/17] iommufd: Add IOMMU_HWPT_ALLOC Jason Gunthorpe
2023-03-09 1:21 ` Baolu Lu
2023-03-08 0:35 ` [PATCH v2 16/17] iommufd/selftest: Return the real idev id from selftest mock_domain Jason Gunthorpe
2023-03-08 0:35 ` [PATCH v2 17/17] iommufd/selftest: Add a selftest for IOMMU_HWPT_ALLOC Jason Gunthorpe
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