From: Halil Pasic <pasic@linux.ibm.com>
To: Pierre Morel <pmorel@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, borntraeger@de.ibm.com,
frankja@linux.ibm.com, mst@redhat.com, jasowang@redhat.com,
cohuck@redhat.com, kvm@vger.kernel.org,
linux-s390@vger.kernel.org,
virtualization@lists.linux-foundation.org,
thomas.lendacky@amd.com, david@gibson.dropbear.id.au,
linuxram@us.ibm.com, heiko.carstens@de.ibm.com,
gor@linux.ibm.com
Subject: Re: [PATCH v5 1/2] virtio: let arch validate VIRTIO features
Date: Thu, 9 Jul 2020 11:58:00 +0200 [thread overview]
Message-ID: <20200709115800.7a6e93c8.pasic@linux.ibm.com> (raw)
In-Reply-To: <1594283959-13742-2-git-send-email-pmorel@linux.ibm.com>
On Thu, 9 Jul 2020 10:39:18 +0200
Pierre Morel <pmorel@linux.ibm.com> wrote:
> An architecture may need to validate the VIRTIO devices features
> based on architecture specifics.
>
> Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Halil Pasic <pasic@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..c4e14d46a5b6 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_validate_virtio_features - provide arch specific hook when finalizing
> + * features for VIRTIO device dev
> + * @dev: the VIRTIO device being added
> + *
> + * Permits the platform to handle architecture-specific requirements when
> + * device features are finalized. This is the default implementation.
> + * 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 */
next prev parent reply other threads:[~2020-07-09 9:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 8:39 [PATCH v5 0/2] s390: virtio: let arch validate VIRTIO features Pierre Morel
2020-07-09 8:39 ` [PATCH v5 1/2] " Pierre Morel
2020-07-09 9:58 ` Halil Pasic [this message]
2020-07-09 10:48 ` Pierre Morel
2020-07-09 8:39 ` [PATCH v5 2/2] s390: virtio: PV needs VIRTIO I/O device protection Pierre Morel
2020-07-09 8:57 ` Cornelia Huck
2020-07-09 9:55 ` Halil Pasic
2020-07-09 10:58 ` Pierre Morel
2020-07-09 10:51 ` Pierre Morel
2020-07-09 14:47 ` Halil Pasic
2020-07-09 14:51 ` Pierre Morel
2020-07-09 15:06 ` Halil Pasic
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200709115800.7a6e93c8.pasic@linux.ibm.com \
--to=pasic@linux.ibm.com \
--cc=borntraeger@de.ibm.com \
--cc=cohuck@redhat.com \
--cc=david@gibson.dropbear.id.au \
--cc=frankja@linux.ibm.com \
--cc=gor@linux.ibm.com \
--cc=heiko.carstens@de.ibm.com \
--cc=jasowang@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linuxram@us.ibm.com \
--cc=mst@redhat.com \
--cc=pmorel@linux.ibm.com \
--cc=thomas.lendacky@amd.com \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).