Re: [PATCH v3 00/10] Add Intel VT-d nested translation

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Subject: Re: [PATCH v3 00/10] Add Intel VT-d nested translation
From: Jason Gunthorpe <jgg@xxxxxxxxxx>
Date: Mon, 29 May 2023 15:43:02 -0300
Cc: "Liu, Yi L" <yi.l.liu@xxxxxxxxx>, "joro@xxxxxxxxxx" <joro@xxxxxxxxxx>, "alex.williamson@xxxxxxxxxx" <alex.williamson@xxxxxxxxxx>, "robin.murphy@xxxxxxx" <robin.murphy@xxxxxxx>, "baolu.lu@xxxxxxxxxxxxxxx" <baolu.lu@xxxxxxxxxxxxxxx>, "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: <BN9PR11MB52765FA8255FB8F8A1A6F11B8C419@BN9PR11MB5276.namprd11.prod.outlook.com>

On Wed, May 24, 2023 at 08:59:43AM +0000, Tian, Kevin wrote:

> At least this looks a reasonable tradeoff to some proprietary VMMs
> which never adds RO mappings in stage-2 today.

What is the reason for the RO anyhow?

Would it be so bad if it was DMA mapped as RW due to the errata?

Jason

Follow-Ups:
- RE: [PATCH v3 00/10] Add Intel VT-d nested translation
  - From: Tian, Kevin
- Re: [PATCH v3 00/10] Add Intel VT-d nested translation
  - From: Alex Williamson

References:
- [PATCH v3 00/10] Add Intel VT-d nested translation
  - From: Yi Liu
- RE: [PATCH v3 00/10] Add Intel VT-d nested translation
  - From: Tian, Kevin

Prev by Date: Re: [PATCH v1 1/5] hostfs: Fix ephemeral inodes
Next by Date: [PATCH v2 00/13] nolibc: add part2 of support for rv32
Previous by thread: RE: [PATCH v3 00/10] Add Intel VT-d nested translation
Next by thread: Re: [PATCH v3 00/10] Add Intel VT-d nested translation
Index(es):
- Date
- Thread

[Index of Archives] [Linux Wireless] [Linux Kernel] [ATH6KL] [Linux Bluetooth] [Linux Netdev] [Kernel Newbies] [Share Photos] [IDE] [Security] [Git] [Netfilter] [Bugtraq] [Yosemite News] [MIPS Linux] [ARM Linux] [Linux Security] [Linux RAID] [Linux ATA RAID] [Samba] [Device Mapper]