Re: [PATCH v4 1/2] virtio: let arch validate VIRTIO features

Cornelia Huck
2020-07-07T09:27:08Z

On Tue, 7 Jul 2020 10:44:36 +0200
Pierre Morel <pmorel@linux.ibm.com> wrote:

> An architecture may need to validate the VIRTIO devices features
> based on architecture specificities.

s/specifities/specifics/

>
> Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
> ---
> drivers/virtio/virtio.c | 19 +++++++++++++++++++
> include/linux/virtio_config.h | 1 +
> 2 files changed, 20 insertions(+)
>
> diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
> index a977e32a88f2..3179a8aa76f5 100644
> --- a/drivers/virtio/virtio.c
> +++ b/drivers/virtio/virtio.c
> @@ -167,6 +167,21 @@ void virtio_add_status(struct virtio_device *dev, unsigned int status)
> }
> EXPORT_SYMBOL_GPL(virtio_add_status);
>
> +/*
> + * arch_needs_virtio_iommu_platform - provide arch specific hook when finalizing

s/arch_needs_virtio_iommu_platform/arch_validate_virtio_features/

:)

> + * features for VIRTIO device dev
> + * @dev: the VIRTIO device being added
> + *
> + * Permits the platform to provide architecture specific functionality when

s/provide architecture specific functionality/handle architecture-specific requirements/

?

> + * devices features are finalized. This is the default implementation.

s/devices/device/

> + * Architecture implementations can override this.
> + */
> +
> +int __weak arch_validate_virtio_features(struct virtio_device *dev)
> +{
> + return 0;
> +}
> +
> int virtio_finalize_features(struct virtio_device *dev)
> {
> int ret = dev->config->finalize_features(dev);
> @@ -176,6 +191,10 @@ int virtio_finalize_features(struct virtio_device *dev)
> if (ret)
> return ret;
>
> + ret = arch_validate_virtio_features(dev);
> + if (ret)
> + return ret;
> +
> if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1))
> return 0;
>
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index bb4cc4910750..3f4117adf311 100644
> --- a/include/linux/virtio_config.h
> +++ b/include/linux/virtio_config.h
> @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev,
> _r; \
> })
>
> +int arch_validate_virtio_features(struct virtio_device *dev);
> #endif /* _LINUX_VIRTIO_CONFIG_H */

With the wording fixed,

Reviewed-by: Cornelia Huck <cohuck@redhat.com>