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ef7c8f2b1f
Major changes: - The iova_bitmap logic for efficiently reporting dirty pages back to userspace has a few more tricky corner case bugs that have been resolved and backed with new tests. The revised version has simpler logic. - Shared branch with iommu for handle support when doing domain attach. Handles allow the domain owner to include additional private data on a per-device basis. - IO Page Fault Reporting to userspace via iommufd. Page faults can be generated on fault capable HWPTs when a translation is not present. Routing them to userspace would allow a VMM to be able to virtualize them into an emulated vIOMMU. This is the next step to fully enabling vSVA support. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRRRCHOFoQz/8F5bUaFwuHvBreFYQUCZpfo4AAKCRCFwuHvBreF YTO6APwMLxeWmHbE1H+7ZPuXP7B1aDuwRLczZOo3i816pIj+bQD+OywEA/NcljK6 6NLeqyUe7tECtVrFPSiRT9lWVuzZSQs= =rnN/ -----END PGP SIGNATURE----- Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd Pull iommufd updates from Jason Gunthorpe: - The iova_bitmap logic for efficiently reporting dirty pages back to userspace has a few more tricky corner case bugs that have been resolved and backed with new tests. The revised version has simpler logic. - Shared branch with iommu for handle support when doing domain attach. Handles allow the domain owner to include additional private data on a per-device basis. - IO Page Fault Reporting to userspace via iommufd. Page faults can be generated on fault capable HWPTs when a translation is not present. Routing them to userspace would allow a VMM to be able to virtualize them into an emulated vIOMMU. This is the next step to fully enabling vSVA support. * tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd: (26 commits) iommufd: Put constants for all the uAPI enums iommufd: Fix error pointer checking iommufd: Add check on user response code iommufd: Remove IOMMUFD_PAGE_RESP_FAILURE iommufd: Require drivers to supply the cache_invalidate_user ops iommufd/selftest: Add coverage for IOPF test iommufd/selftest: Add IOPF support for mock device iommufd: Associate fault object with iommufd_hw_pgtable iommufd: Fault-capable hwpt attach/detach/replace iommufd: Add iommufd fault object iommufd: Add fault and response message definitions iommu: Extend domain attach group with handle support iommu: Add attach handle to struct iopf_group iommu: Remove sva handle list iommu: Introduce domain attachment handle iommufd/iova_bitmap: Remove iterator logic iommufd/iova_bitmap: Dynamic pinning on iova_bitmap_set() iommufd/iova_bitmap: Consolidate iova_bitmap_set exit conditionals iommufd/iova_bitmap: Move initial pinning to iova_bitmap_for_each() iommufd/iova_bitmap: Cache mapped length in iova_bitmap_map struct ...