Received-SPF: pass (google.com: domain of linux-kernel+bounces-146468-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>,
	Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Jason Gunthorpe <jgg@ziepe.ca>
Cc: Tina Zhang <tina.zhang@intel.com>,
	Yi Liu <yi.l.liu@intel.com>,
	iommu@lists.linux.dev,
	linux-kernel@vger.kernel.org,
	Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v3 06/12] iommu/vt-d: Use cache_tag_flush_range_np() in iotlb_sync_map
Date: Tue, 16 Apr 2024 16:06:50 +0800
Message-Id: <20240416080656.60968-7-baolu.lu@linux.intel.com>
In-Reply-To: <20240416080656.60968-1-baolu.lu@linux.intel.com>
References: <20240416080656.60968-1-baolu.lu@linux.intel.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

The iotlb_sync_map callback is called by the iommu core after non-present
to present mappings are created. The iommu driver uses this callback to
invalidate caches if IOMMU is working in caching mode and second-only
translation is used for the domain. Use cache_tag_flush_range_np() in this
callback.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/iommu/intel/iommu.c | 22 +---------------------
 1 file changed, 1 insertion(+), 21 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 6bf5b91b03c5..c6a0d528ad19 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1500,20 +1500,6 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
 		iommu_flush_dev_iotlb(domain, addr, mask);
 }
 
-/* Notification for newly created mappings */
-static void __mapping_notify_one(struct intel_iommu *iommu, struct dmar_domain *domain,
-				 unsigned long pfn, unsigned int pages)
-{
-	/*
-	 * It's a non-present to present mapping. Only flush if caching mode
-	 * and second level.
-	 */
-	if (cap_caching_mode(iommu->cap) && !domain->use_first_level)
-		iommu_flush_iotlb_psi(iommu, domain, pfn, pages, 0, 1);
-	else
-		iommu_flush_write_buffer(iommu);
-}
-
 /*
  * Flush the relevant caches in nested translation if the domain
  * also serves as a parent
@@ -4543,14 +4529,8 @@ 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)
 {
-	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
-	unsigned long pages = aligned_nrpages(iova, size);
-	unsigned long pfn = iova >> VTD_PAGE_SHIFT;
-	struct iommu_domain_info *info;
-	unsigned long i;
+	cache_tag_flush_range_np(to_dmar_domain(domain), iova, iova + size - 1);
 
-	xa_for_each(&dmar_domain->iommu_array, i, info)
-		__mapping_notify_one(info->iommu, dmar_domain, pfn, pages);
 	return 0;
 }
 
-- 
2.34.1