If the IOMMU advertises IOMMU_CAP_TRANSLATE_MSI choose
IOMMU_DOMAIN_MIXED domain type instead of IOMMU_DOMAIN_UNMANAGED
to allow transparent allocation of MSI frame IOVAs.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
drivers/iommu/iommu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 617cb2b..8b4b90c 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1069,7 +1069,10 @@ static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
- return __iommu_domain_alloc(bus, IOMMU_DOMAIN_UNMANAGED);
+ if (bus->iommu_ops->capable(IOMMU_CAP_TRANSLATE_MSI))
+ return __iommu_domain_alloc(bus, IOMMU_DOMAIN_MIXED);
+ else
+ return __iommu_domain_alloc(bus, IOMMU_DOMAIN_UNMANAGED);
}
EXPORT_SYMBOL_GPL(iommu_domain_alloc);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
