linux-kernel - [PATCH 04/23] iommu/vt-d: Drop IOVA cookie management

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Date:   Wed, 21 Jul 2021 19:20:15 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     joro@...tes.org, will@...nel.org
Cc:     iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        suravee.suthikulpanit@....com, baolu.lu@...ux.intel.com,
        john.garry@...wei.com, dianders@...omium.org
Subject: [PATCH 04/23] iommu/vt-d: Drop IOVA cookie management

The core code bakes its own cookies now.

Signed-off-by: Robin Murphy <robin.murphy@....com>
---
 drivers/iommu/intel/iommu.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index dd22fc7d5176..e2add5a0caef 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1980,10 +1980,6 @@ static void domain_exit(struct dmar_domain *domain)
 	/* Remove associated devices and clear attached or cached domains */
 	domain_remove_dev_info(domain);
 
-	/* destroy iovas */
-	if (domain->domain.type == IOMMU_DOMAIN_DMA)
-		iommu_put_dma_cookie(&domain->domain);
-
 	if (domain->pgd) {
 		struct page *freelist;
 
@@ -4544,10 +4540,6 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
 			return NULL;
 		}
 
-		if (type == IOMMU_DOMAIN_DMA &&
-		    iommu_get_dma_cookie(&dmar_domain->domain))
-			return NULL;
-
 		domain = &dmar_domain->domain;
 		domain->geometry.aperture_start = 0;
 		domain->geometry.aperture_end   =
-- 
2.25.1