Add a check to enforce that I/O virtual addresses picked by iommu API
users stay within the domains geometry aperture.
Signed-off-by: Sebastian Ott <seb...@amazon.de>
---
drivers/iommu/amd_iommu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index d2e79e27778e..6485e2081706 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2618,6 +2618,11 @@ static int amd_iommu_map(struct iommu_domain *dom,
unsigned long iova,
if (pgtable.mode == PAGE_MODE_NONE)
return -EINVAL;
+ if (dom->geometry.force_aperture &&
+ (iova < dom->geometry.aperture_start ||
+ iova + page_size - 1 > dom->geometry.aperture_end))
+ return -EINVAL;
+
if (iommu_prot & IOMMU_READ)
prot |= IOMMU_PROT_IR;
if (iommu_prot & IOMMU_WRITE)
--
2.17.1
Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
