On Thu, Jan 09, 2020 at 03:43:10PM +0100, Eric Auger wrote: > Implement a callback called on PCI bus enumeration that > initializes for a given device on the bus hierarchy > an IOMMU memory region. The PCI bus hierarchy is stored > locally in IOMMUPciBus and IOMMUDevice objects. > > At the time of the enumeration, the bus number may not be > computed yet. > > So operations that will need to retrieve the IOMMUdevice > and its IOMMU memory region from the bus number and devfn, > once the bus number is garanteed to be frozen, > use an array of IOMMUPciBus, lazily populated. > > virtio_iommu_mr() is the top helper that allows to retrieve > the IOMMU memory region from the requester ID. > > Signed-off-by: Eric Auger <eric.au...@redhat.com> > > --- > v11 -> v12: > - add the iommu_find_iommu_pcibus() mechanics. Without it, > when attaching t device to a domain we could not check > the device is effectively protected by this IOMMU
Sorry I probably lost the context again after read the previous version... Could you hint me what does this used for? In all cases, I see that virtio_iommu_mr() is introduced but not used. Would be good to put it into the patch where it's firstly used. Thanks, -- Peter Xu
