linux-kernel - [PATCH v2 1/7] iommu/vt-d: Add domain_alloc

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Message-ID: <20241021085125.192333-2-baolu.lu@linux.intel.com>
Date: Mon, 21 Oct 2024 16:51:18 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: iommu@...ts.linux.dev
Cc: Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Kevin Tian <kevin.tian@...el.com>,
	Yi Liu <yi.l.liu@...el.com>,
	Vasant Hegde <vasant.hegde@....com>,
	linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v2 1/7] iommu/vt-d: Add domain_alloc_paging support

Add the domain_alloc_paging callback for domain allocation using the
iommu_paging_domain_alloc() interface.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
---
 drivers/iommu/intel/iommu.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 9f6b0780f2ef..4803e0cb8279 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4590,6 +4590,19 @@ static struct iommu_domain identity_domain = {
 	},
 };
 
+static struct iommu_domain *intel_iommu_domain_alloc_paging(struct device *dev)
+{
+	struct dmar_domain *dmar_domain;
+	bool first_stage;
+
+	first_stage = first_level_by_default(0);
+	dmar_domain = paging_domain_alloc(dev, first_stage);
+	if (IS_ERR(dmar_domain))
+		return ERR_CAST(dmar_domain);
+
+	return &dmar_domain->domain;
+}
+
 const struct iommu_ops intel_iommu_ops = {
 	.blocked_domain		= &blocking_domain,
 	.release_domain		= &blocking_domain,
@@ -4599,6 +4612,7 @@ const struct iommu_ops intel_iommu_ops = {
 	.domain_alloc		= intel_iommu_domain_alloc,
 	.domain_alloc_user	= intel_iommu_domain_alloc_user,
 	.domain_alloc_sva	= intel_svm_domain_alloc,
+	.domain_alloc_paging	= intel_iommu_domain_alloc_paging,
 	.probe_device		= intel_iommu_probe_device,
 	.release_device		= intel_iommu_release_device,
 	.get_resv_regions	= intel_iommu_get_resv_regions,
-- 
2.43.0