This sample driver creates mdev device that simulate virtio net device
over virtio mdev transport. The device is implemented through vringh
and workqueue. A device specific dma ops is to make sure HVA is used
directly as the IOVA. This should be sufficient for kernel virtio
driver to work.
Only 'v
This patch introduces a new mdev transport for virtio. This is used to
use kernel virtio driver to drive the mediated device that is capable
of populating virtqueue directly.
A new virtio-mdev driver will be registered to the mdev bus, when a
new virtio-mdev device is probed, it will register the
This patch implements basic support for mdev driver that supports
virtio transport for kernel virtio driver.
Signed-off-by: Jason Wang
---
drivers/vfio/mdev/mdev_core.c| 20
drivers/vfio/mdev/mdev_private.h | 2 +
include/linux/mdev.h | 6 ++
include/linux/virtio_mdev_o
Currently, except for the create and remove, the rest of
mdev_parent_ops is designed for vfio-mdev driver only and may not help
for kernel mdev driver. With the help of class id, this patch
introduces device specific callbacks inside mdev_device
structure. This allows different set of callback to b
Add support to parse mdev class id table.
Reviewed-by: Parav Pandit
Signed-off-by: Jason Wang
---
drivers/vfio/mdev/vfio_mdev.c | 2 ++
scripts/mod/devicetable-offsets.c | 3 +++
scripts/mod/file2alias.c | 11 +++
3 files changed, 16 insertions(+)
diff --git a/drivers/vf
Mdev bus only supports vfio driver right now, so it doesn't implement
match method. But in the future, we may add drivers other than vfio,
the first driver could be virtio-mdev. This means we need to add
device class id support in bus match method to pair the mdev device
and mdev driver correctly.
Hi all:
There are hardwares that can do virtio datapath offloading while
having its own control path. This path tries to implement a mdev based
unified API to support using kernel virtio driver to drive those
devices. This is done by introducing a new mdev transport for virtio
(virtio_mdev) and re
On Tue, Oct 29, 2019 at 06:51:32PM +0800, Jason Wang wrote:
> On 2019/10/29 下午6:17, Tiwei Bie wrote:
> > This patch adds the network control vq support in vhost-mdev.
> > A vhost-mdev specific op is introduced to allow parent drivers
> > to handle the network control commands come from userspace.
>
On Wed, Oct 30, 2019 at 09:55:57AM +0800, Jason Wang wrote:
> On 2019/10/29 下午6:07, Tiwei Bie wrote:
> > This patch introduces a mdev based hardware vhost backend.
> > This backend is built on top of the same abstraction used
> > in virtio-mdev and provides a generic vhost interface for
> > userspa
On 2019/10/29 下午6:07, Tiwei Bie wrote:
> This patch introduces a mdev based hardware vhost backend.
> This backend is built on top of the same abstraction used
> in virtio-mdev and provides a generic vhost interface for
> userspace to accelerate the virtio devices in guest.
>
> This backend is imp
On Tue, Oct 29, 2019 at 06:48:27PM +0800, Jason Wang wrote:
> On 2019/10/29 下午5:57, Tiwei Bie wrote:
> > On Mon, Oct 28, 2019 at 11:50:49AM +0800, Jason Wang wrote:
> >> On 2019/10/28 上午9:58, Tiwei Bie wrote:
> >>> On Fri, Oct 25, 2019 at 08:16:26AM -0400, Michael S. Tsirkin wrote:
> On Fri, O
On Mon, Aug 12, 2019 at 5:54 AM Borislav Petkov wrote:
>
> On Wed, Jul 31, 2019 at 02:53:06PM +0200, Peter Zijlstra wrote:
> > On Tue, Jul 30, 2019 at 12:12:54PM -0700, Thomas Garnier wrote:
> > > if PIE is enabled, switch the paravirt assembly constraints to be
> > > compatible. The %c/i constrai
On Sun, Oct 27, 2019 at 09:17:52AM +0100, Stefan Hajnoczi wrote:
> On Wed, Oct 23, 2019 at 11:55:52AM +0200, Stefano Garzarella wrote:
> > +static int __init vmci_transport_init(void)
> > +{
> > + int features = VSOCK_TRANSPORT_F_DGRAM;
>
> Where is this variable used?
It is introduced in the p
On Sun, Oct 27, 2019 at 09:01:46AM +0100, Stefan Hajnoczi wrote:
> On Wed, Oct 23, 2019 at 11:55:40AM +0200, Stefano Garzarella wrote:
> > This series adds the multi-transports support to vsock, following
> > this proposal: https://www.spinics.net/lists/netdev/msg575792.html
> >
> > With the multi
Signed-off-by: Jason Wang
---
drivers/virtio/virtio_ring.c | 16 ++--
include/linux/virtio_config.h | 2 ++
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 51d83f4d7c32..ddeef7421d4d 100644
--- a/drive
Signed-off-by: Jason Wang
---
drivers/virtio/virtio_ring.c | 22 +-
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index bdc08244a648..51d83f4d7c32 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drive
We used to have use a single parent for all DMA operations. This tends
to complicate the mdev based hardware virtio datapath offloading which
may not implement the control path over datapath like ctrl vq in the
case of virtio-net.
So this series tries to intorduce per DMA domain by allowing trasnp
On 2019/10/29 下午6:17, Tiwei Bie wrote:
> This patch adds the network control vq support in vhost-mdev.
> A vhost-mdev specific op is introduced to allow parent drivers
> to handle the network control commands come from userspace.
Probably work for userspace driver but not kernel driver.
>
> Si
On 2019/10/29 下午5:57, Tiwei Bie wrote:
> On Mon, Oct 28, 2019 at 11:50:49AM +0800, Jason Wang wrote:
>> On 2019/10/28 上午9:58, Tiwei Bie wrote:
>>> On Fri, Oct 25, 2019 at 08:16:26AM -0400, Michael S. Tsirkin wrote:
On Fri, Oct 25, 2019 at 05:54:55PM +0800, Jason Wang wrote:
> On 2019/10/2
On 2019/10/29 下午3:42, Zhu Lingshan wrote:
>>
>> + void (*set_status)(struct mdev_device *mdev, u8 status);
>
> Hi Jason
>
> Is it possible to make set_status() return an u8 or bool, because this
> may fail in real hardware. Without a returned code, I am not sure
> whether it is a good idea to
This patch adds the network control vq support in vhost-mdev.
A vhost-mdev specific op is introduced to allow parent drivers
to handle the network control commands come from userspace.
Signed-off-by: Tiwei Bie
---
This patch depends on below patch:
https://lkml.org/lkml/2019/10/29/335
drivers/v
This patch introduces a mdev based hardware vhost backend.
This backend is built on top of the same abstraction used
in virtio-mdev and provides a generic vhost interface for
userspace to accelerate the virtio devices in guest.
This backend is implemented as a mdev device driver on top
of the same
On Mon, Oct 28, 2019 at 11:50:49AM +0800, Jason Wang wrote:
> On 2019/10/28 上午9:58, Tiwei Bie wrote:
> > On Fri, Oct 25, 2019 at 08:16:26AM -0400, Michael S. Tsirkin wrote:
> > > On Fri, Oct 25, 2019 at 05:54:55PM +0800, Jason Wang wrote:
> > > > On 2019/10/24 下午6:42, Jason Wang wrote:
> > > > > Ye
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