linux-kernel - Re: [PATCH v4 09/17] iommufd/device: Add helpers to enforce/remove device reserved regions

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Message-ID: <ZSEkgSlEn5OQjzGV@Asurada-Nvidia>
Date:   Sat, 7 Oct 2023 02:27:29 -0700
From:   Nicolin Chen <nicolinc@...dia.com>
To:     Yan Zhao <yan.y.zhao@...el.com>
CC:     Yi Liu <yi.l.liu@...el.com>, <joro@...tes.org>,
        <alex.williamson@...hat.com>, <jgg@...dia.com>,
        <kevin.tian@...el.com>, <robin.murphy@....com>,
        <baolu.lu@...ux.intel.com>, <cohuck@...hat.com>,
        <eric.auger@...hat.com>, <kvm@...r.kernel.org>,
        <mjrosato@...ux.ibm.com>, <chao.p.peng@...ux.intel.com>,
        <yi.y.sun@...ux.intel.com>, <peterx@...hat.com>,
        <jasowang@...hat.com>, <shameerali.kolothum.thodi@...wei.com>,
        <lulu@...hat.com>, <suravee.suthikulpanit@....com>,
        <iommu@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <zhenzhong.duan@...el.com>,
        <joao.m.martins@...cle.com>
Subject: Re: [PATCH v4 09/17] iommufd/device: Add helpers to enforce/remove
 device reserved regions

On Sat, Oct 07, 2023 at 03:20:41PM +0800, Yan Zhao wrote:
> > @@ -444,10 +465,9 @@ iommufd_device_do_replace(struct iommufd_device *idev,
> >       }
> >
> >       old_hwpt = igroup->hwpt;
> > -     if (hwpt->ioas != old_hwpt->ioas) {
> > +     if (iommufd_hw_pagetable_compare_ioas(old_hwpt, hwpt)) {
> >               list_for_each_entry(cur, &igroup->device_list, group_item) {
> > -                     rc = iopt_table_enforce_dev_resv_regions(
> > -                             &hwpt->ioas->iopt, cur->dev, NULL);
> > +                     rc = iommufd_device_enforce_rr(cur, hwpt, NULL);
> >                       if (rc)
> >                               goto err_unresv;
> >               }
> > @@ -461,12 +481,10 @@ iommufd_device_do_replace(struct iommufd_device *idev,
> >       if (rc)
> >               goto err_unresv;
> >
> > -     if (hwpt->ioas != old_hwpt->ioas) {
> > +     if (iommufd_hw_pagetable_compare_ioas(old_hwpt, hwpt)) {
> >               list_for_each_entry(cur, &igroup->device_list, group_item)
> > -                     iopt_remove_reserved_iova(&old_hwpt->ioas->iopt,
> > -                                               cur->dev);
> > +                     iommufd_device_remove_rr(cur, hwpt);
> Should be "iommufd_device_remove_rr(cur, old_hwpt);"

Ah, right. Should fix this.

Thanks!
Nicolin