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author | Nicolin Chen <nicolinc@nvidia.com> | 2022-07-22 19:02:56 -0700 |
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committer | Alex Williamson <alex.williamson@redhat.com> | 2022-07-25 13:41:22 -0600 |
commit | 34a255e67615995f729254307a0581c143e03752 (patch) | |
tree | 9f094c6346aa4e0b77f2b02fb33ae8d530047b04 /drivers/s390/char/tape_std.c | |
parent | c2863febd88bb2d0028eebcf0ee94b49859a06d3 (diff) | |
download | linux-34a255e67615995f729254307a0581c143e03752.tar.bz2 |
vfio: Replace phys_pfn with pages for vfio_pin_pages()
Most of the callers of vfio_pin_pages() want "struct page *" and the
low-level mm code to pin pages returns a list of "struct page *" too.
So there's no gain in converting "struct page *" to PFN in between.
Replace the output parameter "phys_pfn" list with a "pages" list, to
simplify callers. This also allows us to replace the vfio_iommu_type1
implementation with a more efficient one.
And drop the pfn_valid check in the gvt code, as there is no need to
do such a check at a page-backed struct page pointer.
For now, also update vfio_iommu_type1 to fit this new parameter too.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Eric Farman <farman@linux.ibm.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/20220723020256.30081-11-nicolinc@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/s390/char/tape_std.c')
0 files changed, 0 insertions, 0 deletions