• Robin Murphy's avatar
    iommu: Allow selecting page sizes per domain · d16e0faa
    Robin Murphy authored
    Many IOMMUs support multiple page table formats, meaning that any given
    domain may only support a subset of the hardware page sizes presented in
    iommu_ops->pgsize_bitmap. There are also certain use-cases where the
    creator of a domain may want to control which page sizes are used, for
    example to force the use of hugepage mappings to reduce pagetable walk
    depth.
    
    To this end, add a per-domain pgsize_bitmap to represent the subset of
    page sizes actually in use, to make it possible for domains with
    different requirements to coexist.
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    [rm: hijacked and rebased original patch with new commit message]
    Signed-off-by: default avatarRobin Murphy <robin.murphy@arm.com>
    Acked-by: default avatarWill Deacon <will.deacon@arm.com>
    Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
    d16e0faa
mtk_iommu.c 19.2 KB