linux-kernel - [PATCH 4/7] iommu/vt-d: Flush piotlb for SVM and Nested domain

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Message-ID: <20260122014856.2457052-5-baolu.lu@linux.intel.com>
Date: Thu, 22 Jan 2026 09:48:53 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Joerg Roedel <joro@...tes.org>
Cc: Yi Liu <yi.l.liu@...el.com>,
	Dmytro Maluka <dmaluka@...omium.org>,
	Jinhui Guo <guojinhui.liam@...edance.com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/7] iommu/vt-d: Flush piotlb for SVM and Nested domain

From: Yi Liu <yi.l.liu@...el.com>

Besides the paging domains that use FS, SVM and Nested domains need to
use piotlb invalidation descriptor as well.

Fixes: b33125296b50 ("iommu/vt-d: Create unique domain ops for each stage")
Cc: stable@...r.kernel.org
Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Reviewed-by: Kevin Tian <kevin.tian@...el.com>
Link: https://lore.kernel.org/r/20251223065824.6164-1-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
---
 drivers/iommu/intel/cache.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel/cache.c b/drivers/iommu/intel/cache.c
index 265e7290256b..385ae5cfb30d 100644
--- a/drivers/iommu/intel/cache.c
+++ b/drivers/iommu/intel/cache.c
@@ -363,6 +363,13 @@ static void qi_batch_add_pasid_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16
 	qi_batch_increment_index(iommu, batch);
 }
 
+static bool intel_domain_use_piotlb(struct dmar_domain *domain)
+{
+	return domain->domain.type == IOMMU_DOMAIN_SVA ||
+			domain->domain.type == IOMMU_DOMAIN_NESTED ||
+			intel_domain_is_fs_paging(domain);
+}
+
 static void cache_tag_flush_iotlb(struct dmar_domain *domain, struct cache_tag *tag,
 				  unsigned long addr, unsigned long pages,
 				  unsigned long mask, int ih)
@@ -370,7 +377,7 @@ static void cache_tag_flush_iotlb(struct dmar_domain *domain, struct cache_tag *
 	struct intel_iommu *iommu = tag->iommu;
 	u64 type = DMA_TLB_PSI_FLUSH;
 
-	if (intel_domain_is_fs_paging(domain)) {
+	if (intel_domain_use_piotlb(domain)) {
 		qi_batch_add_piotlb(iommu, tag->domain_id, tag->pasid, addr,
 				    pages, ih, domain->qi_batch);
 		return;
-- 
2.43.0