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To:     Lu Baolu <baolu.lu@linux.intel.com>,
        Joerg Roedel <joro@8bytes.org>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Christoph Hellwig <hch@infradead.org>,
        "Raj, Ashok" <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
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        Jean-Philippe Brucker <jean-philippe@linaro.com>,
        "Jiang, Dave" <dave.jiang@intel.com>, Vinod Koul <vkoul@kernel.org>
CC:     Eric Auger <eric.auger@redhat.com>,
        "Liu, Yi L" <yi.l.liu@intel.com>,
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        "iommu@lists.linux.dev" <iommu@lists.linux.dev>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Jean-Philippe Brucker" <jean-philippe@linaro.org>
Subject: RE: [PATCH v10 10/12] iommu: Prepare IOMMU domain for IOPF
Thread-Topic: [PATCH v10 10/12] iommu: Prepare IOMMU domain for IOPF
Thread-Index: AQHYkC3X3zhuGv/Z20C4J9a0jjJ5Mq1yKbbA
Date:   Thu, 7 Jul 2022 01:58:39 +0000
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> From: Lu Baolu <baolu.lu@linux.intel.com>
> Sent: Tuesday, July 5, 2022 1:07 PM
>=20
> This adds some mechanisms around the iommu_domain so that the I/O page
> fault handling framework could route a page fault to the domain and
> call the fault handler from it.
>=20
> Add pointers to the page fault handler and its private data in struct
> iommu_domain. The fault handler will be called with the private data
> as a parameter once a page fault is routed to the domain. Any kernel
> component which owns an iommu domain could install handler and its
> private parameter so that the page fault could be further routed and
> handled.
>=20
> This also prepares the SVA implementation to be the first consumer of
> the per-domain page fault handling model. The I/O page fault handler
> for SVA is copied to the SVA file with mmget_not_zero() added before
> mmap_read_lock().
>=20
> Suggested-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
> Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
> Tested-by: Tony Zhu <tony.zhu@intel.com>

Reviewed-by: Kevin Tian <kevin.tian@intel.com>