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| author | Jacob Pan <jacob.pan@linux.microsoft.com> | 2026-02-13 21:36:36 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2026-03-03 03:29:01 +0300 |
| commit | 7147ec874ea08c322d779d8eba28946e294ed1f3 (patch) | |
| tree | 35de3a82b72b0bb2973dedfa176ebac4f53cc2d7 | |
| parent | 46a93917bf776c35dfdfe7601f8972dacd9259ee (diff) | |
| download | linux-7147ec874ea08c322d779d8eba28946e294ed1f3.tar.xz | |
iommufd: vfio compatibility extension check for noiommu mode
VFIO_CHECK_EXTENSION should return false for TYPE1_IOMMU variants when
in NO-IOMMU mode and IOMMUFD compat container is set. This change makes
the behavior match VFIO_CONTAINER in noiommu mode. It also prevents
userspace from incorrectly attempting to use TYPE1 IOMMU operations
in a no-iommu context.
Fixes: d624d6652a65 ("iommufd: vfio container FD ioctl compatibility")
Link: https://patch.msgid.link/r/20260213183636.3340-1-jacob.pan@linux.microsoft.com
Signed-off-by: Jacob Pan <jacob.pan@linux.microsoft.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | drivers/iommu/iommufd/vfio_compat.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/iommufd/vfio_compat.c b/drivers/iommu/iommufd/vfio_compat.c index a258ee2f4579..acb48cdd3b00 100644 --- a/drivers/iommu/iommufd/vfio_compat.c +++ b/drivers/iommu/iommufd/vfio_compat.c @@ -283,7 +283,7 @@ static int iommufd_vfio_check_extension(struct iommufd_ctx *ictx, case VFIO_TYPE1_IOMMU: case VFIO_TYPE1v2_IOMMU: case VFIO_UNMAP_ALL: - return 1; + return !ictx->no_iommu_mode; case VFIO_NOIOMMU_IOMMU: return IS_ENABLED(CONFIG_VFIO_NOIOMMU); |