From: Yi Liu <yi.l.liu@intel.com>
To: "Tian, Kevin" <kevin.tian@intel.com>,
Jason Gunthorpe <jgg@nvidia.com>,
"Giani, Dhaval" <Dhaval.Giani@amd.com>,
Vasant Hegde <vasant.hegde@amd.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: "joro@8bytes.org" <joro@8bytes.org>,
"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"nicolinc@nvidia.com" <nicolinc@nvidia.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
"chao.p.peng@linux.intel.com" <chao.p.peng@linux.intel.com>,
"yi.y.sun@linux.intel.com" <yi.y.sun@linux.intel.com>,
"peterx@redhat.com" <peterx@redhat.com>,
"jasowang@redhat.com" <jasowang@redhat.com>,
"shameerali.kolothum.thodi@huawei.com"
<shameerali.kolothum.thodi@huawei.com>,
"lulu@redhat.com" <lulu@redhat.com>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-kselftest@vger.kernel.org"
<linux-kselftest@vger.kernel.org>,
"Duan, Zhenzhong" <zhenzhong.duan@intel.com>,
"joao.m.martins@oracle.com" <joao.m.martins@oracle.com>,
"Zeng, Xin" <xin.zeng@intel.com>,
"Zhao, Yan Y" <yan.y.zhao@intel.com>
Subject: Re: [PATCH v6 0/6] iommufd: Add nesting infrastructure (part 2/2)
Date: Mon, 11 Dec 2023 20:36:46 +0800 [thread overview]
Message-ID: <3e77a4a3-3be8-4e04-9435-1f66df93078d@intel.com> (raw)
In-Reply-To: <BN9PR11MB527647A4DA1620DE354983898C8FA@BN9PR11MB5276.namprd11.prod.outlook.com>
On 2023/12/11 10:29, Tian, Kevin wrote:
>> From: Jason Gunthorpe <jgg@nvidia.com>
>> Sent: Saturday, December 9, 2023 9:47 AM
>>
>> What is in a Nested domain:
>> Intel: A single IO page table refereed to by a PASID entry
>> Each vDomain-ID,PASID allocates a unique nesting domain
>> AMD: A GCR3 table pointer
>> Nesting domains are created for every unique GCR3 pointer.
>> vDomain-ID can possibly refer to multiple Nesting domains :(
>> ARM: A CD table pointer
>> Nesting domains are created for every unique CD table top pointer.
>
> this AMD/ARM difference is not very clear to me.
>
> How could a vDomain-ID refer to multiple GCR3 pointers? Wouldn't it
> lead to cache tag conflict when a same PASID entry in multiple GCR3 tables
> points to different I/O page tables?
Perhaps due to only one DomainID in the DTE table indexed by BDF? Actually,
the vDomainID will not be used to tag cache, the host DomainId would be
used instead. @Jason?
--
Regards,
Yi Liu
next prev parent reply other threads:[~2023-12-11 12:34 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-17 13:07 [PATCH v6 0/6] iommufd: Add nesting infrastructure (part 2/2) Yi Liu
2023-11-17 13:07 ` [PATCH v6 1/6] iommu: Add cache_invalidate_user op Yi Liu
2023-11-20 7:53 ` Tian, Kevin
2023-12-06 18:32 ` Jason Gunthorpe
2023-12-06 18:43 ` Nicolin Chen
2023-12-06 18:50 ` Jason Gunthorpe
2023-12-07 6:53 ` Yi Liu
2024-01-08 7:32 ` Binbin Wu
2023-11-17 13:07 ` [PATCH v6 2/6] iommufd: Add IOMMU_HWPT_INVALIDATE Yi Liu
2023-11-20 8:09 ` Tian, Kevin
2023-11-20 8:29 ` Yi Liu
2023-11-20 8:34 ` Tian, Kevin
2023-11-20 17:36 ` Nicolin Chen
2023-11-21 2:50 ` Tian, Kevin
2023-11-21 5:24 ` Nicolin Chen
2023-11-24 2:36 ` Tian, Kevin
2023-11-27 19:53 ` Nicolin Chen
2023-11-28 6:01 ` Yi Liu
2023-11-29 0:54 ` Nicolin Chen
2023-11-28 8:03 ` Tian, Kevin
2023-11-29 0:51 ` Nicolin Chen
2023-11-29 0:57 ` Jason Gunthorpe
2023-11-29 1:09 ` Nicolin Chen
2023-11-29 19:58 ` Jason Gunthorpe
2023-11-29 22:07 ` Nicolin Chen
2023-11-30 0:08 ` Jason Gunthorpe
2023-11-30 20:41 ` Nicolin Chen
2023-12-01 0:45 ` Jason Gunthorpe
2023-12-01 4:29 ` Nicolin Chen
2023-12-01 12:55 ` Jason Gunthorpe
2023-12-01 19:58 ` Nicolin Chen
2023-12-01 20:43 ` Jason Gunthorpe
2023-12-01 22:12 ` Nicolin Chen
2023-12-04 14:48 ` Jason Gunthorpe
2023-12-05 17:33 ` Nicolin Chen
2023-12-06 12:48 ` Jason Gunthorpe
2023-12-01 3:51 ` Yi Liu
2023-12-01 4:50 ` Nicolin Chen
2023-12-01 5:19 ` Tian, Kevin
2023-12-01 7:05 ` Yi Liu
2023-12-01 7:10 ` Tian, Kevin
2023-12-01 9:08 ` Yi Liu
2023-11-21 5:02 ` Baolu Lu
2023-11-21 5:19 ` Nicolin Chen
2023-11-28 5:54 ` Yi Liu
2023-12-06 18:33 ` Jason Gunthorpe
2023-12-07 6:59 ` Yi Liu
2023-12-07 9:04 ` Tian, Kevin
2023-12-07 14:42 ` Jason Gunthorpe
2023-12-11 7:53 ` Yi Liu
2023-12-11 13:21 ` Jason Gunthorpe
2023-12-12 13:45 ` Liu, Yi L
2023-12-12 14:40 ` Jason Gunthorpe
2023-12-13 13:47 ` Liu, Yi L
2023-12-13 14:11 ` Jason Gunthorpe
2023-12-11 7:49 ` Yi Liu
2023-11-17 13:07 ` [PATCH v6 3/6] iommu: Add iommu_copy_struct_from_user_array helper Yi Liu
2023-11-20 8:17 ` Tian, Kevin
2023-11-20 17:25 ` Nicolin Chen
2023-11-21 2:48 ` Tian, Kevin
2024-01-08 8:37 ` Binbin Wu
2023-11-17 13:07 ` [PATCH v6 4/6] iommufd/selftest: Add mock_domain_cache_invalidate_user support Yi Liu
2023-12-06 18:16 ` Jason Gunthorpe
2023-12-11 11:21 ` Yi Liu
2023-11-17 13:07 ` [PATCH v6 5/6] iommufd/selftest: Add IOMMU_TEST_OP_MD_CHECK_IOTLB test op Yi Liu
2023-11-17 13:07 ` [PATCH v6 6/6] iommufd/selftest: Add coverage for IOMMU_HWPT_INVALIDATE ioctl Yi Liu
2023-12-06 18:19 ` Jason Gunthorpe
2023-12-11 11:28 ` Yi Liu
2023-12-11 13:06 ` Jason Gunthorpe
2023-12-09 1:47 ` [PATCH v6 0/6] iommufd: Add nesting infrastructure (part 2/2) Jason Gunthorpe
2023-12-11 2:29 ` Tian, Kevin
2023-12-11 12:36 ` Yi Liu [this message]
2023-12-11 13:05 ` Jason Gunthorpe
2023-12-11 15:34 ` Suthikulpanit, Suravee
2023-12-11 16:06 ` Jason Gunthorpe
2023-12-11 12:35 ` Yi Liu
2023-12-11 13:20 ` Jason Gunthorpe
2023-12-11 20:11 ` Nicolin Chen
2023-12-11 21:48 ` Jason Gunthorpe
2023-12-11 17:35 ` Suthikulpanit, Suravee
2023-12-11 17:45 ` Jason Gunthorpe
2023-12-11 21:27 ` Nicolin Chen
2023-12-11 21:57 ` Jason Gunthorpe
2023-12-12 7:30 ` Nicolin Chen
2023-12-12 14:44 ` Jason Gunthorpe
2023-12-12 19:13 ` Nicolin Chen
2023-12-12 19:21 ` Jason Gunthorpe
2023-12-12 20:05 ` Nicolin Chen
2023-12-13 12:40 ` Jason Gunthorpe
2023-12-13 19:54 ` Nicolin Chen
[not found] ` <CGME20231217215720eucas1p2a590aca62ce8eb5ba81df6bc8b1a785d@eucas1p2.samsung.com>
2023-12-17 11:21 ` Joel Granados
2023-12-19 9:26 ` Yi Liu
2023-12-20 11:23 ` Joel Granados
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