iommu/vt-d: Move capability check code to cap_audit files

Move IOMMU capability check and sanity check code to cap_audit files.
Also implement some helper functions for sanity checks.

Signed-off-by: Kyung Min Park <kyung.min.park@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210130184452.31711-1-kyung.min.park@intel.com
Link: https://lore.kernel.org/r/20210204014401.2846425-4-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/cap_audit.c b/drivers/iommu/intel/cap_audit.c
index 049bc0c..b12e421 100644 (file)
--- a/drivers/iommu/intel/cap_audit.c
+++ b/drivers/iommu/intel/cap_audit.c
@@ -183,3 +183,23 @@ int intel_cap_audit(enum cap_audit_type type, struct intel_iommu *iommu)
 
        return -EFAULT;
 }
+
+bool intel_cap_smts_sanity(void)
+{
+       return ecap_smts(intel_iommu_ecap_sanity);
+}
+
+bool intel_cap_pasid_sanity(void)
+{
+       return ecap_pasid(intel_iommu_ecap_sanity);
+}
+
+bool intel_cap_nest_sanity(void)
+{
+       return ecap_nest(intel_iommu_ecap_sanity);
+}
+
+bool intel_cap_flts_sanity(void)
+{
+       return ecap_flts(intel_iommu_ecap_sanity);
+}

diff --git a/drivers/iommu/intel/cap_audit.h b/drivers/iommu/intel/cap_audit.h
index a6a1530..74cfcca 100644 (file)
--- a/drivers/iommu/intel/cap_audit.h
+++ b/drivers/iommu/intel/cap_audit.h
@@ -107,4 +107,24 @@ enum cap_audit_type {
        CAP_AUDIT_HOTPLUG_IRQR,
 };
 
+bool intel_cap_smts_sanity(void);
+bool intel_cap_pasid_sanity(void);
+bool intel_cap_nest_sanity(void);
+bool intel_cap_flts_sanity(void);
+
+static inline bool scalable_mode_support(void)
+{
+       return (intel_iommu_sm && intel_cap_smts_sanity());
+}
+
+static inline bool pasid_mode_support(void)
+{
+       return scalable_mode_support() && intel_cap_pasid_sanity();
+}
+
+static inline bool nested_mode_support(void)
+{
+       return scalable_mode_support() && intel_cap_nest_sanity();
+}
+
 int intel_cap_audit(enum cap_audit_type type, struct intel_iommu *iommu);

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index de82d5d..7dfe681 100644 (file)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1864,25 +1864,7 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
  */
 static bool first_level_by_default(void)
 {
-       struct dmar_drhd_unit *drhd;
-       struct intel_iommu *iommu;
-       static int first_level_support = -1;
-
-       if (likely(first_level_support != -1))
-               return first_level_support;
-
-       first_level_support = 1;
-
-       rcu_read_lock();
-       for_each_active_iommu(iommu, drhd) {
-               if (!sm_supported(iommu) || !ecap_flts(iommu->ecap)) {
-                       first_level_support = 0;
-                       break;
-               }
-       }
-       rcu_read_unlock();
-
-       return first_level_support;
+       return scalable_mode_support() && intel_cap_flts_sanity();
 }
 
 static struct dmar_domain *alloc_domain(int flags)
@@ -5058,60 +5040,6 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,
        return phys;
 }
 
-static inline bool scalable_mode_support(void)
-{
-       struct dmar_drhd_unit *drhd;
-       struct intel_iommu *iommu;
-       bool ret = true;
-
-       rcu_read_lock();
-       for_each_active_iommu(iommu, drhd) {
-               if (!sm_supported(iommu)) {
-                       ret = false;
-                       break;
-               }
-       }
-       rcu_read_unlock();
-
-       return ret;
-}
-
-static inline bool iommu_pasid_support(void)
-{
-       struct dmar_drhd_unit *drhd;
-       struct intel_iommu *iommu;
-       bool ret = true;
-
-       rcu_read_lock();
-       for_each_active_iommu(iommu, drhd) {
-               if (!pasid_supported(iommu)) {
-                       ret = false;
-                       break;
-               }
-       }
-       rcu_read_unlock();
-
-       return ret;
-}
-
-static inline bool nested_mode_support(void)
-{
-       struct dmar_drhd_unit *drhd;
-       struct intel_iommu *iommu;
-       bool ret = true;
-
-       rcu_read_lock();
-       for_each_active_iommu(iommu, drhd) {
-               if (!sm_supported(iommu) || !ecap_nest(iommu->ecap)) {
-                       ret = false;
-                       break;
-               }
-       }
-       rcu_read_unlock();
-
-       return ret;
-}
-
 static bool intel_iommu_capable(enum iommu_cap cap)
 {
        if (cap == IOMMU_CAP_CACHE_COHERENCY)
@@ -5352,7 +5280,7 @@ intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
                int ret;
 
                if (!dev_is_pci(dev) || dmar_disabled ||
-                   !scalable_mode_support() || !iommu_pasid_support())
+                   !scalable_mode_support() || !pasid_mode_support())
                        return false;
 
                ret = pci_pasid_features(to_pci_dev(dev));