On Tue, 2018-05-29 at 09:48 +1000, Benjamin Herrenschmidt wrote:
> > Well it's not supposed to be much slower for the static case.
> >
> > vhost has a cache so should be fine.
> >
> > A while ago Paolo implemented a translation cache which should be
> > perfect for this case - most of the code go
On Fri, 2018-05-25 at 20:45 +0300, Michael S. Tsirkin wrote:
> On Thu, May 24, 2018 at 08:27:04AM +1000, Benjamin Herrenschmidt wrote:
> > On Wed, 2018-05-23 at 21:50 +0300, Michael S. Tsirkin wrote:
> >
> > > I re-read that discussion and I'm still unclear on the
> > > original question, since I
On Thu, May 24, 2018 at 08:27:04AM +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2018-05-23 at 21:50 +0300, Michael S. Tsirkin wrote:
>
> > I re-read that discussion and I'm still unclear on the
> > original question, since I got several apparently
> > conflicting answers.
> >
> > I asked:
> >
On Wed, May 23, 2018 at 09:50:02PM +0300, Michael S. Tsirkin wrote:
> subj: s/virito/virtio/
>
..snip..
> > machine_subsys_initcall_sync(pseries, tce_iommu_bus_notifier_init);
> > +
> > +bool platform_forces_virtio_dma(struct virtio_device *vdev)
> > +{
> > + /*
> > +* On protected guest pl
On Thu, May 24, 2018 at 08:27:04AM +1000, Benjamin Herrenschmidt wrote:
> - First qemu doesn't know that the guest will switch to "secure mode"
> in advance. There is no difference between a normal and a secure
> partition until the partition does the magic UV call to "enter secure
> mode" and qemu
On Wed, 2018-05-23 at 21:50 +0300, Michael S. Tsirkin wrote:
> I re-read that discussion and I'm still unclear on the
> original question, since I got several apparently
> conflicting answers.
>
> I asked:
>
> Why isn't setting VIRTIO_F_IOMMU_PLATFORM on the
> hypervisor side suffici
subj: s/virito/virtio/
On Tue, May 22, 2018 at 12:03:17PM +0530, Anshuman Khandual wrote:
> This adds a hook which a platform can define in order to allow it to
> force the use of the DMA API for all virtio devices even if they don't
> have the VIRTIO_F_IOMMU_PLATFORM flag set. We want to use thi
This adds a hook which a platform can define in order to allow it to
force the use of the DMA API for all virtio devices even if they don't
have the VIRTIO_F_IOMMU_PLATFORM flag set. We want to use this to do
bounce-buffering of data on the new secure pSeries platform, currently
under development,
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