RE: [PATCH v4 12/12] iommu/vt-d: Disallow nesting on domains with read-only mappings

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Subject: RE: [PATCH v4 12/12] iommu/vt-d: Disallow nesting on domains with read-only mappings
From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date: Thu, 3 Aug 2023 04:00:35 +0000
Accept-language: en-US
Cc: "cohuck@xxxxxxxxxx" <cohuck@xxxxxxxxxx>, "eric.auger@xxxxxxxxxx" <eric.auger@xxxxxxxxxx>, "nicolinc@xxxxxxxxxx" <nicolinc@xxxxxxxxxx>, "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, "mjrosato@xxxxxxxxxxxxx" <mjrosato@xxxxxxxxxxxxx>, "chao.p.peng@xxxxxxxxxxxxxxx" <chao.p.peng@xxxxxxxxxxxxxxx>, "yi.y.sun@xxxxxxxxxxxxxxx" <yi.y.sun@xxxxxxxxxxxxxxx>, "peterx@xxxxxxxxxx" <peterx@xxxxxxxxxx>, "jasowang@xxxxxxxxxx" <jasowang@xxxxxxxxxx>, "shameerali.kolothum.thodi@xxxxxxxxxx" <shameerali.kolothum.thodi@xxxxxxxxxx>, "lulu@xxxxxxxxxx" <lulu@xxxxxxxxxx>, "suravee.suthikulpanit@xxxxxxx" <suravee.suthikulpanit@xxxxxxx>, "iommu@xxxxxxxxxxxxxxx" <iommu@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-kselftest@xxxxxxxxxxxxxxx" <linux-kselftest@xxxxxxxxxxxxxxx>, "Duan, Zhenzhong" <zhenzhong.duan@xxxxxxxxx>
In-reply-to: <b099a333-65b1-de9e-742d-d12f4fb58f67@linux.intel.com>
References: <20230724111335.107427-1-yi.l.liu@intel.com> <20230724111335.107427-13-yi.l.liu@intel.com> <BN9PR11MB52767DF0C8F25AB893B38B678C0BA@BN9PR11MB5276.namprd11.prod.outlook.com> <b099a333-65b1-de9e-742d-d12f4fb58f67@linux.intel.com>

> From: Baolu Lu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Thursday, August 3, 2023 11:27 AM
> 
> On 2023/8/2 15:59, Tian, Kevin wrote:
> >> From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
> >> Sent: Monday, July 24, 2023 7:14 PM
> >>
> >> +	u8 read_only_mapped:1;		/* domain has mappings with
> >> read-only
> >> +					 * permission.
> >> +					 */
> >> +	u8 set_nested:1;		/* has other domains nested on it */
> >
> > what about "is_parent"?
> 
> "is_parent" is still a bit generic. How about "is_nested_parent"?
> 

looks good.

References:
- [PATCH v4 00/12] Add Intel VT-d nested translation
  - From: Yi Liu
- [PATCH v4 12/12] iommu/vt-d: Disallow nesting on domains with read-only mappings
  - From: Yi Liu
- RE: [PATCH v4 12/12] iommu/vt-d: Disallow nesting on domains with read-only mappings
  - From: Tian, Kevin
- Re: [PATCH v4 12/12] iommu/vt-d: Disallow nesting on domains with read-only mappings
  - From: Baolu Lu

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