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. 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. 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. 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(). This is on github: https://github.com/nicolinc/iommufd/commits/vfio_pin_pages Terrence has tested this series on i915; Eric has tested on s390. Thanks! Changelog v3: * Added a patch to replace roundup with DIV_ROUND_UP in i915 gvt * Dropped the "driver->ops->unpin_pages" and NULL checks in PATCH-1 * Changed to use WARN_ON and separate into lines in PATCH-1 * Replaced "guest" words with "user" and fix typo in PATCH-5 * Updated commit log of PATCH-1, PATCH-6, and PATCH-10 * Added Reviewed/Acked-by from Christoph, Jason, Kirti, Kevin and Eric * Added Tested-by from Terrence (i915) and Eric (s390) v2: https://lore.kernel.org/kvm/20220706062759.24946-1-nicolinc@xxxxxxxxxx/ * Added a patch to make vfio_unpin_pages return void * Added two patches to remove PFN list from two s390 callers * Renamed "phys_page" parameter to "pages" for vfio_pin_pages * Updated commit log of kmap_local_page() patch * Added Harald's "Reviewed-by" to pa_ind patch * Rebased on top of Alex's extern removal path v1: https://lore.kernel.org/kvm/20220616235212.15185-1-nicolinc@xxxxxxxxxx/ Nicolin Chen (10): vfio: Make vfio_unpin_pages() return void drm/i915/gvt: Replace roundup with DIV_ROUND_UP vfio/ap: Pass in physical address of ind to ap_aqic() vfio/ccw: Only pass in contiguous pages vfio: Pass in starting IOVA to vfio_pin/unpin_pages API vfio/ap: Change saved_pfn to saved_iova vfio/ccw: Change pa_pfn list to pa_iova list vfio: Rename user_iova of vfio_dma_rw() vfio/ccw: Add kmap_local_page() for memcpy vfio: Replace phys_pfn with pages for vfio_pin_pages() .../driver-api/vfio-mediated-device.rst | 6 +- arch/s390/include/asm/ap.h | 6 +- drivers/gpu/drm/i915/gvt/kvmgt.c | 49 ++--- drivers/s390/cio/vfio_ccw_cp.c | 195 +++++++++++------- drivers/s390/crypto/ap_queue.c | 2 +- drivers/s390/crypto/vfio_ap_ops.c | 54 +++-- drivers/s390/crypto/vfio_ap_private.h | 4 +- drivers/vfio/vfio.c | 54 ++--- drivers/vfio/vfio.h | 8 +- drivers/vfio/vfio_iommu_type1.c | 45 ++-- include/linux/vfio.h | 9 +- 11 files changed, 215 insertions(+), 217 deletions(-) -- 2.17.1
