Messages in this thread | | | Date | Thu, 10 Nov 2016 12:48:16 +0100 | From | Joerg Roedel <> | Subject | Re: [PATCH v6 7/9] iommu/amd: Update domain into to dte entry during device driver init |
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On Thu, Oct 20, 2016 at 07:37:18PM +0800, Baoquan He wrote: > prot = dir2prot(direction); > + if (translation_pre_enabled(iommu) && !dev_data->domain_updated) { > + dev_data->domain_updated = true; > + set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled); > + if (alias != dev_data->devid) > + set_dte_entry(alias, domain, dev_data->ats.enabled); > + device_flush_dte(dev_data); > + }
Hmm, I really don't like to have these checks in the fast-path. But to get rid of it I think we need to re-work the way domains are assigned to devices.
One way to do this would be to add a 'defered-domain-attach' feature to the iommu-core code. What do you think about this?
Joerg
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