[PATCH 1/2] iommu/vt-d: report SVA feature with generic flag

[Jacob Pan]

Query Shared Virtual Address/Memory capability is a generic feature. Report
Intel SVM as SVA feature such that generic code such as Uacce [1] can use
it.
[1] https://lkml.org/lkml/2020/1/15/604

Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
---
 drivers/iommu/intel-iommu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 92c2f2e4197b..5eca6e10d2a4 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -6346,9 +6346,14 @@ intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
 static int
 intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
 {
+	struct intel_iommu *intel_iommu = dev_to_intel_iommu(dev);
+
 	if (feat == IOMMU_DEV_FEAT_AUX)
 		return intel_iommu_enable_auxd(dev);
 
+	if (feat == IOMMU_DEV_FEAT_SVA)
+		return intel_iommu->flags & VTD_FLAG_SVM_CAPABLE;
+
 	return -ENODEV;
 }
 
-- 
2.7.4