A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 11:11:45 -04:00
Code Issues Projects Releases Packages Wiki Activity

iommu: Allow selecting page sizes per domain

Browse source 
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: Will Deacon <[email protected]>
[rm: hijacked and rebased original patch with new commit message]
Signed-off-by: Robin Murphy <[email protected]>
Acked-by: Will Deacon <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Robin Murphy 2016-04-07 18:42:06 +01:00 • committed by Joerg Roedel
commit d16e0faab9
5 changed files with 17 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/vfio/vfio_iommu_type1.c
View file

@ -407,7 +407,7 @@ static unsigned long vfio_pgsize_bitmap(struct vfio_iommu *iommu)
mutex_lock(&iommu->lock);
list_for_each_entry(domain, &iommu->domain_list, next)
bitmap &= domain->domain->ops->pgsize_bitmap;
bitmap &= domain->domain->pgsize_bitmap;
mutex_unlock(&iommu->lock);
/*