linux-kernel - [PATCH 10/18] iommu/vt-d: Use cache_tag_flush_all() in flush_iotlb

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Date: Wed, 24 Apr 2024 15:16:36 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>
Cc: Jason Gunthorpe <jgg@...pe.ca>,
	Jingqi Liu <Jingqi.liu@...el.com>,
	Dimitri Sivanich <sivanich@....com>,
	Uros Bizjak <ubizjak@...il.com>,
	Colin Ian King <colin.i.king@...il.com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 10/18] iommu/vt-d: Use cache_tag_flush_all() in flush_iotlb_all

The flush_iotlb_all callback is called by the iommu core to flush
all caches for the affected domain. Use cache_tag_flush_all() in
this callback.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Link: https://lore.kernel.org/r/20240416080656.60968-5-baolu.lu@linux.intel.com
---
 drivers/iommu/intel/iommu.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 473df7cd1672..a268e2a51f4d 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1557,25 +1557,7 @@ static void parent_domain_flush(struct dmar_domain *domain,
 
 static void intel_flush_iotlb_all(struct iommu_domain *domain)
 {
-	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
-	struct iommu_domain_info *info;
-	unsigned long idx;
-
-	xa_for_each(&dmar_domain->iommu_array, idx, info) {
-		struct intel_iommu *iommu = info->iommu;
-		u16 did = domain_id_iommu(dmar_domain, iommu);
-
-		if (dmar_domain->use_first_level)
-			domain_flush_pasid_iotlb(iommu, dmar_domain, 0, -1, 0);
-		else
-			iommu->flush.flush_iotlb(iommu, did, 0, 0,
-						 DMA_TLB_DSI_FLUSH);
-
-		iommu_flush_dev_iotlb(dmar_domain, 0, MAX_AGAW_PFN_WIDTH);
-	}
-
-	if (dmar_domain->nested_parent)
-		parent_domain_flush(dmar_domain, 0, -1, 0);
+	cache_tag_flush_all(to_dmar_domain(domain));
 }
 
 static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu)
-- 
2.34.1