Displaying 5 results from an estimated 5 matches for "ccw_private".
2019 May 08
3
[PATCH 06/10] s390/cio: add basic protected virtualization support
...ubchannel_probe(struct subchannel *sch)
> if (!io_priv)
> goto out_schedule;
>
> + io_priv->dma_area = dma_alloc_coherent(&sch->dev,
> + sizeof(*io_priv->dma_area),
> + &io_priv->dma_area_dma, GFP_KERNEL);
This needs GFP_DMA.
You use a genpool for ccw_private->dma and not for iopriv->dma - looks
kinda inconsistent.
2019 May 08
3
[PATCH 06/10] s390/cio: add basic protected virtualization support
...ubchannel_probe(struct subchannel *sch)
> if (!io_priv)
> goto out_schedule;
>
> + io_priv->dma_area = dma_alloc_coherent(&sch->dev,
> + sizeof(*io_priv->dma_area),
> + &io_priv->dma_area_dma, GFP_KERNEL);
This needs GFP_DMA.
You use a genpool for ccw_private->dma and not for iopriv->dma - looks
kinda inconsistent.
2019 May 08
0
[PATCH 06/10] s390/cio: add basic protected virtualization support
...>
> > + io_priv->dma_area = dma_alloc_coherent(&sch->dev,
> > + sizeof(*io_priv->dma_area),
> > + &io_priv->dma_area_dma, GFP_KERNEL);
>
> This needs GFP_DMA.
Christoph already answered this one. Thanks Christoph!
> You use a genpool for ccw_private->dma and not for iopriv->dma - looks
> kinda inconsistent.
>
Please have a look at patch #9. A virtio-ccw device uses the genpool of
it's ccw device (the pool from which ccw_private->dma is allicated) for
the ccw stuff it needs to do. AFAICT for a subchannel device and its API...
2019 Apr 26
33
[PATCH 00/10] s390: virtio: support protected virtualization
Enhanced virtualization protection technology may require the use of
bounce buffers for I/O. While support for this was built into the virtio
core, virtio-ccw wasn't changed accordingly.
Some background on technology (not part of this series) and the
terminology used.
* Protected Virtualization (PV):
Protected Virtualization guarantees, that non-shared memory of a guest
that operates in PV
2019 Apr 26
33
[PATCH 00/10] s390: virtio: support protected virtualization
Enhanced virtualization protection technology may require the use of
bounce buffers for I/O. While support for this was built into the virtio
core, virtio-ccw wasn't changed accordingly.
Some background on technology (not part of this series) and the
terminology used.
* Protected Virtualization (PV):
Protected Virtualization guarantees, that non-shared memory of a guest
that operates in PV