On Sun, Nov 26, 2023 at 10:34:28PM -0800, Yi Liu wrote:
> +static int intel_nested_set_dev_pasid(struct iommu_domain *domain,
> + struct device *dev, ioasid_t pasid)
> +{
> + struct device_domain_info *info = dev_iommu_priv_get(dev);
> + struct dmar_domain *dmar_domain = to_dmar_domain(domain);
> + struct intel_iommu *iommu = info->iommu;
> + struct dev_pasid_info *dev_pasid;
> + unsigned long flags;
> + int ret = 0;
> +
> + if (!pasid_supported(iommu))
> + return -EOPNOTSUPP;
> +
> + if (iommu->agaw < dmar_domain->s2_domain->agaw)
> + return -EINVAL;
> +
> + ret = prepare_domain_attach_device(&dmar_domain->s2_domain->domain,
> dev);
> + if (ret)
> + return ret;
> +
> + dev_pasid = kzalloc(sizeof(*dev_pasid), GFP_KERNEL);
> + if (!dev_pasid)
> + return -ENOMEM;
> +
> + ret = domain_attach_iommu(dmar_domain, iommu);
> + if (ret)
> + goto err_free;
> +
> + ret = intel_pasid_setup_nested(iommu, dev, pasid, dmar_domain);
> + if (ret)
> + goto err_detach_iommu;
> +
> + dev_pasid->dev = dev;
> + dev_pasid->pasid = pasid;
> + spin_lock_irqsave(&dmar_domain->lock, flags);
> + list_add(&dev_pasid->link_domain, &dmar_domain->dev_pasids);
> + spin_unlock_irqrestore(&dmar_domain->lock, flags);
> +
> + return 0;
> +err_detach_iommu:
> + domain_detach_iommu(dmar_domain, iommu);
> +err_free:
> + kfree(dev_pasid);
> + return ret;
> +}
This seems alot longer than I'd think it should be, why isn't it
exactly the same code as the other set_dev_pasid's?
Jason
