On Thu, Jul 09, 2020 at 10:29:52AM +0000, Bertrand Marquis wrote: > > > > On 8 Jul 2020, at 14:32, Roger Pau Monné <[email protected]> wrote: > > > > On Wed, Jul 08, 2020 at 12:55:36PM +0000, Bertrand Marquis wrote: > >> Hi, > >> > >> Here are the notes we took during the design session around PCI devices > >> passthrough on Arm. > >> Feel free to comment or add anything :-) > >> > >> Bertrand > >> > >> PCI devices passthrough on Arm Design Session > >> ====================================== > >> > >> Date: 7/7/2020 > >> > >> - X86 VPCI support is for the PVH guest . > > > > Current vPCI is only for PVH dom0. We need to decide what to do for > > PVH domUs, whether we want to use vPCI or xenpt from Paul: > > > > http://xenbits.xen.org/gitweb/?p=people/pauldu/xenpt.git;a=summary > > > > Or something else. I think this decision also needs to take into > > account Arm. > > We are currently using vpci for guests. > But we could also look into xenpt but from a quick check it does require a > Dom0 which would defeat the Dom0less use case.
Right, you need a hardware domain in order to use xenpt. Note that AFAICT you would also need a hardware domain in order to do the placement of BARs for example if the firmware is not doing it for you. Likely better to discuss all this against a design document instead of raising specific issues here I guess :). Roger.
