From: Vasant Hegde <vasant.hegde@amd.com>
To: <iommu@lists.linux.dev>, <joro@8bytes.org>
Cc: <suravee.suthikulpanit@amd.com>, <wei.huang2@amd.com>,
<jsnitsel@redhat.com>, <jgg@ziepe.ca>,
Vasant Hegde <vasant.hegde@amd.com>
Subject: [PATCH v3 02/12] iommu/amd: Do not override PASID entry in GCR3 table
Date: Mon, 16 Oct 2023 10:43:41 +0000 [thread overview]
Message-ID: <20231016104351.5749-3-vasant.hegde@amd.com> (raw)
In-Reply-To: <20231016104351.5749-1-vasant.hegde@amd.com>
Return error if PASID is already exists.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
---
drivers/iommu/amd/iommu.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index d6e9f1ebd1ea..8e5d1dcc50dc 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -1945,6 +1945,9 @@ static int __clear_gcr3(struct iommu_dev_data *dev_data, ioasid_t pasid)
if (pte == NULL)
return -EINVAL;
+ if (*pte & GCR3_VALID)
+ return -EBUSY;
+
*pte = 0;
amd_iommu_dev_flush_pasid_all(dev_data, pasid);
--
2.31.1
next prev parent reply other threads:[~2023-10-16 10:45 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-16 10:43 [PATCH v3 00/12] iommu/amd: SVA Support (Part 4) - SVA and IOPF Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 01/12] iommu/amd: Rename amd_iommu_v2_supported() as amd_iommu_pasid_supported() Vasant Hegde
2023-11-06 17:50 ` Jason Gunthorpe
2023-10-16 10:43 ` Vasant Hegde [this message]
2023-11-06 17:51 ` [PATCH v3 02/12] iommu/amd: Do not override PASID entry in GCR3 table Jason Gunthorpe
2023-11-07 6:26 ` Vasant Hegde
2023-11-07 13:34 ` Jason Gunthorpe
2023-10-16 10:43 ` [PATCH v3 03/12] iommu/amd: Introduce per device DTE update function Vasant Hegde
2023-11-06 17:54 ` Jason Gunthorpe
2023-11-07 6:47 ` Vasant Hegde
2023-11-07 13:36 ` Jason Gunthorpe
2023-10-16 10:43 ` [PATCH v3 04/12] iommu/amd: Add support for enabling/disabling IOMMU features Vasant Hegde
2023-11-06 17:55 ` Jason Gunthorpe
2023-10-16 10:43 ` [PATCH v3 05/12] iommu/amd: Initial SVA support for AMD IOMMU Vasant Hegde
2023-11-06 23:18 ` Jason Gunthorpe
2023-12-20 11:00 ` Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 06/12] iommu/amd: Add support to enable/disable PASID feature Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 07/12] iommu/amd: Move PPR-related functions into ppr.c Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 08/12] iommu/amd: Define per-IOMMU iopf_queue Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 09/12] iommu/amd: Add support for page response Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 10/12] iommu/amd: Add support for add/remove device for IOPF Vasant Hegde
2023-10-16 10:43 ` [PATCH v3 11/12] iommu/amd: Add IO page fault notifier handler Vasant Hegde
2023-11-06 23:20 ` Jason Gunthorpe
2023-11-07 6:42 ` Vasant Hegde
2023-11-07 13:35 ` Jason Gunthorpe
2023-10-16 10:43 ` [PATCH v3 12/12] iommu/amd: Introduce logic to enable/disable IOPF Vasant Hegde
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