linux-kernel - Re: [PATCH v2 02/11] iommu: Add nested domain support

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Message-ID: <ZGfEqmD0mrE0NTDW@Asurada-Nvidia>
Date:   Fri, 19 May 2023 11:49:14 -0700
From:   Nicolin Chen <nicolinc@...dia.com>
To:     "Tian, Kevin" <kevin.tian@...el.com>
CC:     "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>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "eric.auger@...hat.com" <eric.auger@...hat.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "mjrosato@...ux.ibm.com" <mjrosato@...ux.ibm.com>,
        "chao.p.peng@...ux.intel.com" <chao.p.peng@...ux.intel.com>,
        "yi.y.sun@...ux.intel.com" <yi.y.sun@...ux.intel.com>,
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        "shameerali.kolothum.thodi@...wei.com" 
        <shameerali.kolothum.thodi@...wei.com>,
        "lulu@...hat.com" <lulu@...hat.com>,
        "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>
Subject: Re: [PATCH v2 02/11] iommu: Add nested domain support

On Fri, May 19, 2023 at 08:51:21AM +0000, Tian, Kevin wrote:
 
> > @@ -346,6 +350,10 @@ struct iommu_ops {
> >   * @iotlb_sync_map: Sync mappings created recently using @map to the
> > hardware
> >   * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty
> > flush
> >   *            queue
> > + * @cache_invalidate_user: Flush hardware TLBs caching user space IO
> > mappings
> > + * @cache_invalidate_user_data_len: Defined length of input user data for
> > the
> > + *                                  cache_invalidate_user op, being sizeof the
> > + *                                  structure in include/uapi/linux/iommufd.h
> 
> same as comment to last patch, can this be merged with @hw_info?

I think it's better to keep them separate, since this is added
in struct iommu_domain_ops, given it is domain/hwpt specific,
while the hw_info is in struct iommu_ops?

Thanks
Nic