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| author | Michael S. Tsirkin <mst@redhat.com> | 2020-06-24 18:24:33 -0400 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-08-03 16:11:42 -0400 |
| commit | 321bd212619a7269308696e4ddc446930ea73fad (patch) | |
| tree | ef593d7e57259ba3c8004759bd8afca0791c640c /include | |
| parent | bcf876870b95592b52519ed4aafcf9d95999bc9c (diff) | |
| download | lwn-321bd212619a7269308696e4ddc446930ea73fad.tar.gz lwn-321bd212619a7269308696e4ddc446930ea73fad.zip | |
virtio: VIRTIO_F_IOMMU_PLATFORM -> VIRTIO_F_ACCESS_PLATFORM
Rename the bit to match latest virtio spec.
Add a compat macro to avoid breaking existing userspace.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio_config.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/virtio_config.h | 10 |
2 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index bb4cc4910750..f2cc2a0df174 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -171,7 +171,7 @@ static inline bool virtio_has_iommu_quirk(const struct virtio_device *vdev) * Note the reverse polarity of the quirk feature (compared to most * other features), this is for compatibility with legacy systems. */ - return !virtio_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM); + return !virtio_has_feature(vdev, VIRTIO_F_ACCESS_PLATFORM); } static inline diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h index ff8e7dc9d4dd..b5eda06f0d57 100644 --- a/include/uapi/linux/virtio_config.h +++ b/include/uapi/linux/virtio_config.h @@ -67,13 +67,17 @@ #define VIRTIO_F_VERSION_1 32 /* - * If clear - device has the IOMMU bypass quirk feature. - * If set - use platform tools to detect the IOMMU. + * If clear - device has the platform DMA (e.g. IOMMU) bypass quirk feature. + * If set - use platform DMA tools to access the memory. * * Note the reverse polarity (compared to most other features), * this is for compatibility with legacy systems. */ -#define VIRTIO_F_IOMMU_PLATFORM 33 +#define VIRTIO_F_ACCESS_PLATFORM 33 +#ifndef __KERNEL__ +/* Legacy name for VIRTIO_F_ACCESS_PLATFORM (for compatibility with old userspace) */ +#define VIRTIO_F_IOMMU_PLATFORM VIRTIO_F_ACCESS_PLATFORM +#endif /* __KERNEL__ */ /* This feature indicates support for the packed virtqueue layout. */ #define VIRTIO_F_RING_PACKED 34 |