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| author | Jacob Pan <jacob.pan.linux@gmail.com> | 2020-09-25 09:32:44 -0700 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-10-01 14:52:46 +0200 |
| commit | 8d3bb3b8cbf2ffb3ef73720a48b3445518dcdb55 (patch) | |
| tree | 0128ef643c3e803b601e0665b73b2a818b717c53 /include/uapi/linux/iommu.h | |
| parent | 1e6aaae93e9ddb9dc664993eb949b1da94cab3a5 (diff) | |
| download | linux-next-8d3bb3b8cbf2ffb3ef73720a48b3445518dcdb55.tar.gz | |
iommu/uapi: Use named union for user data
IOMMU UAPI data size is filled by the user space which must be validated
by the kernel. To ensure backward compatibility, user data can only be
extended by either re-purpose padding bytes or extend the variable sized
union at the end. No size change is allowed before the union. Therefore,
the minimum size is the offset of the union.
To use offsetof() on the union, we must make it named.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/linux-iommu/20200611145518.0c2817d6@x1.home/
Link: https://lore.kernel.org/r/1601051567-54787-4-git-send-email-jacob.jun.pan@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/uapi/linux/iommu.h')
| -rw-r--r-- | include/uapi/linux/iommu.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h index b42acc8fe007..5946779ac1f9 100644 --- a/include/uapi/linux/iommu.h +++ b/include/uapi/linux/iommu.h @@ -267,7 +267,7 @@ struct iommu_cache_invalidate_info { union { struct iommu_inv_pasid_info pasid_info; struct iommu_inv_addr_info addr_info; - }; + } granu; }; /** @@ -333,7 +333,7 @@ struct iommu_gpasid_bind_data { /* Vendor specific data */ union { struct iommu_gpasid_bind_data_vtd vtd; - }; + } vendor; }; #endif /* _UAPI_IOMMU_H */ |