[PATCH 02/10] iommu/vt-d: Set IOASID capacity when SVM is enabled

[Jacob Pan]

Assign system-wide PASID capacity with enumerated max value.
Currently, all Intel SVM capable devices should support full 20 bits of
PASID value.

Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
---
 drivers/iommu/intel-iommu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a699a765c983..ec3fc121744a 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3510,6 +3510,10 @@ static int __init init_dmars(void)
 	if (ret)
 		goto free_iommu;
 
+	/* PASID is needed for scalable mode irrespective to SVM */
+	if (intel_iommu_sm)
+		ioasid_install_capacity(intel_pasid_max_id);
+
 	/*
 	 * for each drhd
 	 *   enable fault log
-- 
2.7.4