Hi Jean, On 12/17/19 4:21 PM, Jean-Philippe Brucker wrote: > Hi Eric, > > On Tue, Dec 17, 2019 at 12:05:18PM +0100, Auger Eric wrote: >>> + fwspec = dev_iommu_fwspec_get(dev); >>> + if (!err && fwspec) >>> + of_property_read_u32(master_np, "pasid-num-bits", >>> + &fwspec->num_pasid_bits); >>> + } >> This patch dedicates to platform devices however I fail to understand, >> at that stage, how/when do you retrieve/store the same max capability >> for PCI devices? > > For PCI devices, the max capability is only described by the PCIe PASID > capability, not by firmware. Patch 13 deals with PCI by setting > masted->ssid_bits from the PASID capability directly, ignoring > fwspec->num_pasid_bits.
Get it now. thank you for the explanation. Eric > >> Besides, >> >> Reviewed-by: Eric Auger <eric.au...@redhat.com> > > Thanks! > Jean > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-ker...@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
