iommu/vt-d: Add first level page table interface

This adds an interface to setup the PASID entries for first
level page table translation.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/iommu/intel-pasid.h b/drivers/iommu/intel-pasid.h
index 55bb8715329d..512c63ec8a22 100644
--- a/drivers/iommu/intel-pasid.h
+++ b/drivers/iommu/intel-pasid.h
@@ -25,6 +25,14 @@
  */
 #define FLPT_DEFAULT_DID		1
 
+/*
+ * The SUPERVISOR_MODE flag indicates a first level translation which
+ * can be used for access to kernel addresses. It is valid only for
+ * access to the kernel's static 1:1 mapping of physical memory — not
+ * to vmalloc or even module mappings.
+ */
+#define PASID_FLAG_SUPERVISOR_MODE	BIT(0)
+
 struct pasid_dir_entry {
 	u64 val;
 };
@@ -51,6 +59,9 @@ struct pasid_table *intel_pasid_get_table(struct device *dev);
 int intel_pasid_get_dev_max_id(struct device *dev);
 struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid);
 void intel_pasid_clear_entry(struct device *dev, int pasid);
+int intel_pasid_setup_first_level(struct intel_iommu *iommu,
+				  struct device *dev, pgd_t *pgd,
+				  int pasid, u16 did, int flags);
 int intel_pasid_setup_second_level(struct intel_iommu *iommu,
 				   struct dmar_domain *domain,
 				   struct device *dev, int pasid);