linux-kernel - [PATCH RFC PREVIEW 3/6] iommufd: Enable PRI when doing the iommufd_hwpt

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Message-Id: <20240826-iopf-for-all-v1-3-59174e6a7528@samsung.com>
Date: Mon, 26 Aug 2024 13:40:29 +0200
From: Klaus Jensen <its@...elevant.dk>
To: David Woodhouse <dwmw2@...radead.org>, 
 Lu Baolu <baolu.lu@...ux.intel.com>, 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>
Cc: Minwoo Im <minwoo.im@...sung.com>, linux-kernel@...r.kernel.org, 
 iommu@...ts.linux.dev, Joel Granados <j.granados@...sung.com>, 
 Klaus Jensen <k.jensen@...sung.com>
Subject: [PATCH RFC PREVIEW 3/6] iommufd: Enable PRI when doing the
 iommufd_hwpt_alloc

From: Joel Granados <j.granados@...sung.com>

Add IOMMU_HWPT_FAULT_ID_VALID as part of the valid flags when doing an
iommufd_hwpt_alloc allowing the use of an iommu fault allocation
(iommu_fault_alloc) with the IOMMU_HWPT_ALLOC ioctl.

Signed-off-by: Joel Granados <j.granados@...sung.com>
---
 drivers/iommu/intel/iommu.c          | 3 ++-
 drivers/iommu/iommufd/hw_pagetable.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 4ca284d53a6b..ada3507d2831 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -3716,7 +3716,8 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags,
 	}
 
 	if (flags &
-	    (~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING)))
+	    (~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING
+	       | IOMMU_HWPT_FAULT_ID_VALID)))
 		return ERR_PTR(-EOPNOTSUPP);
 	if (nested_parent && !nested_supported(iommu))
 		return ERR_PTR(-EOPNOTSUPP);
diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c
index aefde4443671..88074e459995 100644
--- a/drivers/iommu/iommufd/hw_pagetable.c
+++ b/drivers/iommu/iommufd/hw_pagetable.c
@@ -107,7 +107,8 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
 			  const struct iommu_user_data *user_data)
 {
 	const u32 valid_flags = IOMMU_HWPT_ALLOC_NEST_PARENT |
-				IOMMU_HWPT_ALLOC_DIRTY_TRACKING;
+				IOMMU_HWPT_ALLOC_DIRTY_TRACKING |
+				IOMMU_HWPT_FAULT_ID_VALID;
 	const struct iommu_ops *ops = dev_iommu_ops(idev->dev);
 	struct iommufd_hwpt_paging *hwpt_paging;
 	struct iommufd_hw_pagetable *hwpt;

-- 
2.45.2