linux-kernel - [PATCH v2 05/12] iommu/vt-d: Use cache_tag_flush_range() in tlb

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Message-Id: <20240410020844.253535-6-baolu.lu@linux.intel.com>
Date: Wed, 10 Apr 2024 10:08:37 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Kevin Tian <kevin.tian@...el.com>,
	Jason Gunthorpe <jgg@...pe.ca>
Cc: Tina Zhang <tina.zhang@...el.com>,
	Yi Liu <yi.l.liu@...el.com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v2 05/12] iommu/vt-d: Use cache_tag_flush_range() in tlb_sync

The tlb_sync callback is called by the iommu core to flush a range of
caches for the affected domain. Use cache_tag_flush_range() in this
callback.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
---
 drivers/iommu/intel/iommu.c | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 2af3e6f54af0..8ec69f09935d 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4101,25 +4101,8 @@ static size_t intel_iommu_unmap_pages(struct iommu_domain *domain,
 static void intel_iommu_tlb_sync(struct iommu_domain *domain,
 				 struct iommu_iotlb_gather *gather)
 {
-	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
-	unsigned long iova_pfn = IOVA_PFN(gather->start);
-	size_t size = gather->end - gather->start;
-	struct iommu_domain_info *info;
-	unsigned long start_pfn;
-	unsigned long nrpages;
-	unsigned long i;
-
-	nrpages = aligned_nrpages(gather->start, size);
-	start_pfn = mm_to_dma_pfn_start(iova_pfn);
-
-	xa_for_each(&dmar_domain->iommu_array, i, info)
-		iommu_flush_iotlb_psi(info->iommu, dmar_domain,
-				      start_pfn, nrpages,
-				      list_empty(&gather->freelist), 0);
-
-	if (dmar_domain->nested_parent)
-		parent_domain_flush(dmar_domain, start_pfn, nrpages,
-				    list_empty(&gather->freelist));
+	cache_tag_flush_range(to_dmar_domain(domain), gather->start,
+			      gather->end, list_empty(&gather->freelist));
 	put_pages_list(&gather->freelist);
 }
 
-- 
2.34.1