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Subject: RE: [RFT][PATCH v2 0/9] Update vfio_pin/unpin_pages API
Thread-Topic: [RFT][PATCH v2 0/9] Update vfio_pin/unpin_pages API
Thread-Index: AQHYkQGYmzwXVwAIR0+upNM3ZOmxoq1ybcTA
Date:   Thu, 7 Jul 2022 06:08:45 +0000
Message-ID: <BN9PR11MB52768822A11C158214C6A6A48C839@BN9PR11MB5276.namprd11.prod.outlook.com>
References: <20220706062759.24946-1-nicolinc@nvidia.com>
In-Reply-To: <20220706062759.24946-1-nicolinc@nvidia.com>
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> From: Nicolin Chen
> Sent: Wednesday, July 6, 2022 2:28 PM
>=20
> This is a preparatory series for IOMMUFD v2 patches. It prepares for
> replacing vfio_iommu_type1 implementations of vfio_pin/unpin_pages()
> with IOMMUFD version.
>=20
> There's a gap between these two versions: the vfio_iommu_type1 version
> inputs a non-contiguous PFN list and outputs another PFN list for the
> pinned physical page list, while the IOMMUFD version only supports a
> contiguous address input by accepting the starting IO virtual address
> of a set of pages to pin and by outputting to a physical page list.
>=20
> The nature of existing callers mostly aligns with the IOMMUFD version,
> except s390's vfio_ccw_cp code where some additional change is needed
> along with this series. Overall, updating to "iova" and "phys_page"
> does improve the caller side to some extent.
>=20
> Also fix a misuse of physical address and virtual address in the s390's
> crypto code. And update the input naming at the adjacent vfio_dma_rw().
>=20
> This is on github:
> https://github.com/nicolinc/iommufd/commits/vfio_pin_pages
>=20
> Request for testing: I only did build for s390 and i915 code, so it'd
> be nice to have people who have environment to run sanity accordingly.
>=20

+Terrence who is testing it for i915 now...