Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-02 09:01:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

iommu: Map reserved memory as cacheable if device is coherent

Browse Source 
Check if the device is marked as DMA coherent in the DT and if so,
map its reserved memory as cacheable in the IOMMU.
This fixes the recently added IOMMU reserved memory support which
uses IOMMU_RESV_DIRECT without properly building the PROT for the
mapping.

Fixes: a5bf3cfce8 ("iommu: Implement of_iommu_get_resv_regions()")
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20230926152600.8749-1-laurentiu.tudor@nxp.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Laurentiu Tudor 2023-09-26 18:26:00 +03:00 committed by Joerg Roedel
parent 2cc14f52ae
commit f1aad9df93
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/iommu/of_iommu.c
View File

@ -254,6 +254,9 @@ void of_iommu_get_resv_regions(struct device *dev, struct list_head *list)
phys_addr_t iova;
size_t length;
if (of_dma_is_coherent(dev->of_node))
prot |= IOMMU_CACHE;
maps = of_translate_dma_region(np, maps, &iova, &length);
type = iommu_resv_region_get_type(dev, &phys, iova, length);