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| author | Robin Murphy <robin.murphy@arm.com> | 2022-05-11 21:12:58 +0200 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2022-05-11 21:12:58 +0200 |
| commit | a77109ffca339097833f26a1fea55ff71e2b608a (patch) | |
| tree | e50c94a9607c90e939cc09141ede20411865f609 /drivers/vfio/vfio.c | |
| parent | Merge tag 'gvt-next-2022-04-29' into v5.19/vfio/next (diff) | |
| download | linux-a77109ffca339097833f26a1fea55ff71e2b608a.tar.xz linux-a77109ffca339097833f26a1fea55ff71e2b608a.zip | |
vfio: Stop using iommu_present()
IOMMU groups have been mandatory for some time now, so a device without
one is necessarily a device without any usable IOMMU, therefore the
iommu_present() check is redundant (or at best unhelpful).
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/537103bbd7246574f37f2c88704d7824a3a889f2.1649160714.git.robin.murphy@arm.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio.c')
| -rw-r--r-- | drivers/vfio/vfio.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index a4555014bd1e..7b0a7b85e77e 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -745,11 +745,11 @@ static struct vfio_group *vfio_group_find_or_alloc(struct device *dev) iommu_group = iommu_group_get(dev); #ifdef CONFIG_VFIO_NOIOMMU - if (!iommu_group && noiommu && !iommu_present(dev->bus)) { + if (!iommu_group && noiommu) { /* * With noiommu enabled, create an IOMMU group for devices that - * don't already have one and don't have an iommu_ops on their - * bus. Taint the kernel because we're about to give a DMA + * don't already have one, implying no IOMMU hardware/driver + * exists. Taint the kernel because we're about to give a DMA * capable device to a user without IOMMU protection. */ group = vfio_noiommu_group_alloc(dev, VFIO_NO_IOMMU); |