[PATCH 1/1] iommu/vt-d: Fix pointer cast warnings on 32 bit

Lu Baolu baolu.lu at linux.intel.com
Tue May 19 01:34:23 UTC 2020

Pointers should be casted to unsigned long to avoid "cast from pointer
to integer of different size" warnings.

drivers/iommu/intel-pasid.c:818:6: warning:
    cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/iommu/intel-pasid.c:821:9: warning:
    cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/iommu/intel-pasid.c:824:23: warning:
    cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/iommu/intel-svm.c:343:45: warning:
    cast to pointer from integer of different size [-Wint-to-pointer-cast]

Fixes: d64d47f4f5678 ("iommu/vt-d: Add nested translation helper function")
Fixes: a3bea1a35c083 ("iommu/vt-d: Add bind guest PASID support")
Signed-off-by: Lu Baolu <baolu.lu at linux.intel.com>
 drivers/iommu/intel-pasid.c | 8 ++++----
 drivers/iommu/intel-svm.c   | 3 ++-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
index 25d749830500..c81f0f17c6ba 100644
--- a/drivers/iommu/intel-pasid.c
+++ b/drivers/iommu/intel-pasid.c
@@ -815,13 +815,13 @@ int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev,
 	/* First level PGD is in GPA, must be supported by the second level */
-	if ((unsigned long long)gpgd > domain->max_addr) {
+	if ((uintptr_t)gpgd > domain->max_addr) {
-				    "Guest PGD %llx not supported, max %llx\n",
-				    (unsigned long long)gpgd, domain->max_addr);
+				    "Guest PGD %lx not supported, max %llx\n",
+				    (uintptr_t)gpgd, domain->max_addr);
 		return -EINVAL;
-	pasid_set_flptr(pte, (u64)gpgd);
+	pasid_set_flptr(pte, (uintptr_t)gpgd);
 	ret = intel_pasid_setup_bind_data(iommu, pte, pasid_data);
 	if (ret)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 11366dc91971..acc7555b002d 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -340,7 +340,8 @@ int intel_svm_bind_gpasid(struct iommu_domain *domain, struct device *dev,
 	 * call the nested mode setup function here.
-	ret = intel_pasid_setup_nested(iommu, dev, (pgd_t *)data->gpgd,
+	ret = intel_pasid_setup_nested(iommu, dev,
+				       (pgd_t *)(uintptr_t)data->gpgd,
 				       data->hpasid, &data->vtd, dmar_domain,

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