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iommu/vt-d: Check UAPI data processed by IOMMU core

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IOMMU generic layer already does sanity checks on UAPI data for version
match and argsz range based on generic information.

This patch adjusts the following data checking responsibilities:
- removes the redundant version check from VT-d driver
- removes the check for vendor specific data size
- adds check for the use of reserved/undefined flags

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/1601051567-54787-7-git-send-email-jacob.jun.pan@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jacob Pan 2020-09-25 09:32:47 -07:00 • committed by Joerg Roedel
parent d90573812e
commit 6278eecba3
3 changed files with 11 additions and 4 deletions
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1
include/uapi/linux/iommu.h
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@ -288,6 +288,7 @@ struct iommu_gpasid_bind_data_vtd {
#define IOMMU_SVA_VTD_GPASID_PWT (1 << 3) /* page-level write through */
#define IOMMU_SVA_VTD_GPASID_EMTE (1 << 4) /* extended mem type enable */
#define IOMMU_SVA_VTD_GPASID_CD (1 << 5) /* PASID-level cache disable */
#define IOMMU_SVA_VTD_GPASID_LAST (1 << 6)
__u64 flags;
__u32 pat;
__u32 emt;