Merge v6.12.43linux-rolling-lts

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

4 files changed, 52 insertions, 19 deletions

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 601fb878d0ef..0c35a235ab6d 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -258,6 +258,7 @@ static const struct of_device_id qcom_smmu_client_of_match[] __maybe_unused = {
 	{ .compatible = "qcom,sdm670-mdss" },
 	{ .compatible = "qcom,sdm845-mdss" },
 	{ .compatible = "qcom,sdm845-mss-pil" },
+	{ .compatible = "qcom,sm6115-mdss" },
 	{ .compatible = "qcom,sm6350-mdss" },
 	{ .compatible = "qcom,sm6375-mdss" },
 	{ .compatible = "qcom,sm8150-mdss" },
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index af4e6c1e55db..b300f72cf01e 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1957,6 +1957,18 @@ static bool dev_is_real_dma_subdevice(struct device *dev)
 	       pci_real_dma_dev(to_pci_dev(dev)) != to_pci_dev(dev);
 }
 
+static bool domain_need_iotlb_sync_map(struct dmar_domain *domain,
+				       struct intel_iommu *iommu)
+{
+	if (cap_caching_mode(iommu->cap) && !domain->use_first_level)
+		return true;
+
+	if (rwbf_quirk || cap_rwbf(iommu->cap))
+		return true;
+
+	return false;
+}
+
 static int dmar_domain_attach_device(struct dmar_domain *domain,
 				     struct device *dev)
 {
@@ -1994,6 +2006,8 @@ static int dmar_domain_attach_device(struct dmar_domain *domain,
 	if (ret)
 		goto out_block_translation;
 
+	domain->iotlb_sync_map |= domain_need_iotlb_sync_map(domain, iommu);
+
 	return 0;
 
 out_block_translation:
@@ -4278,7 +4292,10 @@ static bool risky_device(struct pci_dev *pdev)
 static int intel_iommu_iotlb_sync_map(struct iommu_domain *domain,
 				      unsigned long iova, size_t size)
 {
-	cache_tag_flush_range_np(to_dmar_domain(domain), iova, iova + size - 1);
+	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
+
+	if (dmar_domain->iotlb_sync_map)
+		cache_tag_flush_range_np(dmar_domain, iova, iova + size - 1);
 
 	return 0;
 }
diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index 6f16eeb2ac65..f521155fb793 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -614,6 +614,9 @@ struct dmar_domain {
 	u8 has_mappings:1;		/* Has mappings configured through
 					 * iommu_map() interface.
 					 */
+	u8 iotlb_sync_map:1;		/* Need to flush IOTLB cache or write
+					 * buffer when creating mappings.
+					 */
 
 	spinlock_t lock;		/* Protect device tracking lists */
 	struct list_head devices;	/* all devices' list */
diff --git a/drivers/iommu/iommufd/io_pagetable.c b/drivers/iommu/iommufd/io_pagetable.c
index 4bf7ccd39d46..067222b238b7 100644
--- a/drivers/iommu/iommufd/io_pagetable.c
+++ b/drivers/iommu/iommufd/io_pagetable.c
@@ -70,36 +70,45 @@ struct iopt_area *iopt_area_contig_next(struct iopt_area_contig_iter *iter)
 	return iter->area;
 }
 
-static bool __alloc_iova_check_hole(struct interval_tree_double_span_iter *span,
-				    unsigned long length,
-				    unsigned long iova_alignment,
-				    unsigned long page_offset)
+static bool __alloc_iova_check_range(unsigned long *start, unsigned long last,
+				     unsigned long length,
+				     unsigned long iova_alignment,
+				     unsigned long page_offset)
 {
-	if (span->is_used || span->last_hole - span->start_hole < length - 1)
+	unsigned long aligned_start;
+
+	/* ALIGN_UP() */
+	if (check_add_overflow(*start, iova_alignment - 1, &aligned_start))
 		return false;
+	aligned_start &= ~(iova_alignment - 1);
+	aligned_start |= page_offset;
 
-	span->start_hole = ALIGN(span->start_hole, iova_alignment) |
-			   page_offset;
-	if (span->start_hole > span->last_hole ||
-	    span->last_hole - span->start_hole < length - 1)
+	if (aligned_start >= last || last - aligned_start < length - 1)
 		return false;
+	*start = aligned_start;
 	return true;
 }
 
-static bool __alloc_iova_check_used(struct interval_tree_span_iter *span,
+static bool __alloc_iova_check_hole(struct interval_tree_double_span_iter *span,
 				    unsigned long length,
 				    unsigned long iova_alignment,
 				    unsigned long page_offset)
 {
-	if (span->is_hole || span->last_used - span->start_used < length - 1)
+	if (span->is_used)
 		return false;
+	return __alloc_iova_check_range(&span->start_hole, span->last_hole,
+					length, iova_alignment, page_offset);
+}
 
-	span->start_used = ALIGN(span->start_used, iova_alignment) |
-			   page_offset;
-	if (span->start_used > span->last_used ||
-	    span->last_used - span->start_used < length - 1)
+static bool __alloc_iova_check_used(struct interval_tree_span_iter *span,
+				    unsigned long length,
+				    unsigned long iova_alignment,
+				    unsigned long page_offset)
+{
+	if (span->is_hole)
 		return false;
-	return true;
+	return __alloc_iova_check_range(&span->start_used, span->last_used,
+					length, iova_alignment, page_offset);
 }
 
 /*
@@ -696,8 +705,10 @@ again:
 			iommufd_access_notify_unmap(iopt, area_first, length);
 			/* Something is not responding to unmap requests. */
 			tries++;
-			if (WARN_ON(tries > 100))
-				return -EDEADLOCK;
+			if (WARN_ON(tries > 100)) {
+				rc = -EDEADLOCK;
+				goto out_unmapped;
+			}
 			goto again;
 		}
 
@@ -719,6 +730,7 @@ again:
 out_unlock_iova:
 	up_write(&iopt->iova_rwsem);
 	up_read(&iopt->domains_rwsem);
+out_unmapped:
 	if (unmapped)
 		*unmapped = unmapped_bytes;
 	return rc;