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...fig op to get valid iova range from the vDPA > device. > > Signed-off-by: Jason Wang <jasowang at redhat.com> > --- > include/linux/vdpa.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..b7633ed2500c 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -41,6 +41,16 @@ struct vdpa_device { > unsigned int index; > }; > > +/** > + * vDPA IOVA range - the IOVA range support by the device > + * @start: start of the IOVA range > + * @e...

...fig op to get valid iova range from the vDPA > device. > > Signed-off-by: Jason Wang <jasowang at redhat.com> > --- > include/linux/vdpa.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..b7633ed2500c 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -41,6 +41,16 @@ struct vdpa_device { > unsigned int index; > }; > > +/** > + * vDPA IOVA range - the IOVA range support by the device > + * @start: start of the IOVA range > + * @e...

Hi All: This series introduces API for reporing IOVA range. This is a must for userspace to work correclty: - for the process that uses vhost-vDPA directly to properly allocate IOVA - for VM(qemu), when vIOMMU is not enabled, fail early if GPA is out of range - for VM(qemu), when vIOMMU is enabled, determine a valid guest address width Please review. Thanks Jason Wang (4): vdpa:

Hi All: This series introduces API for reporing IOVA range. This is a must for userspace to work correclty: - for the process that uses vhost-vDPA directly to properly allocate IOVA - for VM(qemu), when vIOMMU is not enabled, fail early if GPA is out of range - for VM(qemu), when vIOMMU is enabled, determine a valid guest address width Please review. Thanks Jason Wang (4): vdpa:

...> >>>>>> --- >>>>>> include/linux/vdpa.h | 14 ++++++++++++++ >>>>>> 1 file changed, 14 insertions(+) >>>>>> >>>>>> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h >>>>>> index 239db794357c..b7633ed2500c 100644 >>>>>> --- a/include/linux/vdpa.h >>>>>> +++ b/include/linux/vdpa.h >>>>>> @@ -41,6 +41,16 @@ struct vdpa_device { >>>>>> unsigned int index; >>>>>> }; >>>>>> &gt...

...> >>>>>> --- >>>>>> include/linux/vdpa.h | 14 ++++++++++++++ >>>>>> 1 file changed, 14 insertions(+) >>>>>> >>>>>> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h >>>>>> index 239db794357c..b7633ed2500c 100644 >>>>>> --- a/include/linux/vdpa.h >>>>>> +++ b/include/linux/vdpa.h >>>>>> @@ -41,6 +41,16 @@ struct vdpa_device { >>>>>> unsigned int index; >>>>>> }; >>>>>> &gt...

...a_release_dev; > vdev->index = err; > vdev->config = config; > + vdev->features_valid = false; > > err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); > if (err) > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..29b8296f1414 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -33,12 +33,14 @@ struct vdpa_notification_area { > * @dma_dev: the actual device that is performing DMA > * @config: the configuration ops for this device. > * @index: device index > +...

...a_release_dev; > vdev->index = err; > vdev->config = config; > + vdev->features_valid = false; > > err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); > if (err) > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..29b8296f1414 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -33,12 +33,14 @@ struct vdpa_notification_area { > * @dma_dev: the actual device that is performing DMA > * @config: the configuration ops for this device. > * @index: device index > +...

.... > > Signed-off-by: Zhu Lingshan <lingshan.zhu at intel.com> > Suggested-by: Jason Wang <jasowang at redhat.com> > --- > include/linux/vdpa.h | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..cebc79173aaa 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -87,6 +87,11 @@ struct vdpa_device { > * @vdev: vdpa device > * @idx: virtqueue index > * Returns the notifcation area > + * @get_vq_irq: Get the irq number of a virtqueue &g...

...device *parent, vdev->dev.release = vdpa_release_dev; vdev->index = err; vdev->config = config; + vdev->features_valid = false; err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); if (err) diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 239db794357c..29b8296f1414 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -33,12 +33,14 @@ struct vdpa_notification_area { * @dma_dev: the actual device that is performing DMA * @config: the configuration ops for this device. * @index: device index + * @features_valid: were features initi...

This patch introduce a config op to get valid iova range from the vDPA device. Signed-off-by: Jason Wang <jasowang at redhat.com> --- include/linux/vdpa.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 239db794357c..b7633ed2500c 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -41,6 +41,16 @@ struct vdpa_device { unsigned int index; }; +/** + * vDPA IOVA range - the IOVA range support by the device + * @start: start of the IOVA range + * @end: end of the IOVA range + */ +struct vdpa_iova_r...

...device *parent, vdev->dev.release = vdpa_release_dev; vdev->index = err; vdev->config = config; + vdev->features_valid = false; err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); if (err) diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 239db794357c..29b8296f1414 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -33,12 +33,14 @@ struct vdpa_notification_area { * @dma_dev: the actual device that is performing DMA * @config: the configuration ops for this device. * @index: device index + * @features_valid: were features initi...

...the vDPA >> device. >> >> Signed-off-by: Jason Wang<jasowang at redhat.com> >> --- >> include/linux/vdpa.h | 14 ++++++++++++++ >> 1 file changed, 14 insertions(+) >> >> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h >> index 239db794357c..b7633ed2500c 100644 >> --- a/include/linux/vdpa.h >> +++ b/include/linux/vdpa.h >> @@ -41,6 +41,16 @@ struct vdpa_device { >> unsigned int index; >> }; >> >> +/** >> + * vDPA IOVA range - the IOVA range support by the device >> + * @sta...

...gt; > Signed-off-by: Jason Wang <jasowang at redhat.com> > > > --- > > > include/linux/vdpa.h | 14 ++++++++++++++ > > > 1 file changed, 14 insertions(+) > > > > > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > > > index 239db794357c..b7633ed2500c 100644 > > > --- a/include/linux/vdpa.h > > > +++ b/include/linux/vdpa.h > > > @@ -41,6 +41,16 @@ struct vdpa_device { > > > unsigned int index; > > > }; > > > > > > +/** > > > + * vDPA IOVA range - the IOVA...

...the vDPA >> device. >> >> Signed-off-by: Jason Wang<jasowang at redhat.com> >> --- >> include/linux/vdpa.h | 14 ++++++++++++++ >> 1 file changed, 14 insertions(+) >> >> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h >> index 239db794357c..b7633ed2500c 100644 >> --- a/include/linux/vdpa.h >> +++ b/include/linux/vdpa.h >> @@ -41,6 +41,16 @@ struct vdpa_device { >> unsigned int index; >> }; >> >> +/** >> + * vDPA IOVA range - the IOVA range support by the device >> + * @sta...

...m> > > > > > --- > > > > > include/linux/vdpa.h | 14 ++++++++++++++ > > > > > 1 file changed, 14 insertions(+) > > > > > > > > > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > > > > > index 239db794357c..b7633ed2500c 100644 > > > > > --- a/include/linux/vdpa.h > > > > > +++ b/include/linux/vdpa.h > > > > > @@ -41,6 +41,16 @@ struct vdpa_device { > > > > > unsigned int index; > > > > > }; > > > > > > &...

...t; > > > include/linux/vdpa.h | 14 ++++++++++++++ > > > > > > > 1 file changed, 14 insertions(+) > > > > > > > > > > > > > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > > > > > > > index 239db794357c..b7633ed2500c 100644 > > > > > > > --- a/include/linux/vdpa.h > > > > > > > +++ b/include/linux/vdpa.h > > > > > > > @@ -41,6 +41,16 @@ struct vdpa_device { > > > > > > > unsigned int index; > > > > &...

...vdev->index = err; > > vdev->config = config; > > + vdev->features_valid = false; > > err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); > > if (err) > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > > index 239db794357c..29b8296f1414 100644 > > --- a/include/linux/vdpa.h > > +++ b/include/linux/vdpa.h > > @@ -33,12 +33,14 @@ struct vdpa_notification_area { > > * @dma_dev: the actual device that is performing DMA > > * @config: the configuration ops for this device. > >...

Config space endian-ness is currently a mess: fields are not tagged with the correct endian-ness so it's easy to make mistakes like instanciating config space in native endian-ness. The following patches adding sparse tagging are currently in my tree. Lightly tested. As a follow-up, I plan to add new APIs that handle modern config space in a more efficient way (bypassing the version check).

Hi all: This series introduce basic functionality of doorbell mapping support for vhost-vDPA. Userspace program may use mmap() to map a the doorbell of a specific virtqueue into its address space. This is help to reudce the syscall or vmexit overhead. A new vdpa_config_ops was introduced to report the location of the doorbell, vhost_vdpa may then choose to map the doorbell when: - The doorbell