Re: [PATCH v2 0/2] spapr: Use vIOMMU translation for virtio by default

2020-02-13 Thread David Gibson
On Thu, Feb 13, 2020 at 12:46:43PM +0100, Greg Kurz wrote: > On Thu, 13 Feb 2020 11:58:35 +1100 > David Gibson wrote: > > > Upcoming Secure VM support for pSeries machines introduces some > > complications for virtio, since the transfer buffers need to be > > explicitly shared so that the

Re: [PATCH v2 0/2] spapr: Use vIOMMU translation for virtio by default

2020-02-13 Thread Greg Kurz
On Thu, 13 Feb 2020 11:58:35 +1100 David Gibson wrote: > Upcoming Secure VM support for pSeries machines introduces some > complications for virtio, since the transfer buffers need to be > explicitly shared so that the hypervisor can access them. > > While it's not strictly speaking dependent

[PATCH v2 0/2] spapr: Use vIOMMU translation for virtio by default

2020-02-12 Thread David Gibson
Upcoming Secure VM support for pSeries machines introduces some complications for virtio, since the transfer buffers need to be explicitly shared so that the hypervisor can access them. While it's not strictly speaking dependent on it, the fact that virtio devices bypass normal platform IOMMU