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Message-ID: <BN9PR11MB5276E2B6AFB5617395E9A5768CDEA@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Wed, 25 Oct 2023 06:46:20 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: "Liu, Yi L" <yi.l.liu@...el.com>,
"joro@...tes.org" <joro@...tes.org>,
"alex.williamson@...hat.com" <alex.williamson@...hat.com>,
"jgg@...dia.com" <jgg@...dia.com>,
"robin.murphy@....com" <robin.murphy@....com>,
"baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>
CC: "cohuck@...hat.com" <cohuck@...hat.com>,
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<shameerali.kolothum.thodi@...wei.com>,
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"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
"Duan, Zhenzhong" <zhenzhong.duan@...el.com>,
"Martins, Joao" <joao.m.martins@...cle.com>
Subject: RE: [PATCH v6 04/10] iommufd/device: Wrap
IOMMUFD_OBJ_HWPT_PAGING-only configurations
> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Tuesday, October 24, 2023 11:06 PM
> +
> +static int iommufd_group_do_replace_paging(struct iommufd_group
> *igroup,
> + struct iommufd_hw_pagetable
> *hwpt)
> +{
> + struct iommufd_hw_pagetable *old_hwpt = igroup->hwpt;
> + struct iommufd_device *cur;
> + int rc;
> +
> + lockdep_assert_held(&igroup->lock);
> +
> + if (hwpt_is_paging(old_hwpt) && hwpt->ioas != old_hwpt->ioas) {
> + list_for_each_entry(cur, &igroup->device_list, group_item) {
> + rc = iopt_table_enforce_dev_resv_regions(
> + &hwpt->ioas->iopt, cur->dev, NULL);
> + if (rc)
> + goto err_unresv;
> + }
should be:
if (!hwpt_is_paging(old_hwpt) || hwpt->ioas != old_hwpt->ioas) {
...
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