From: Jason Gunthorpe via iommu <iommu@lists.linux-foundation.org>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>,
Yishai Hadas <yishaih@nvidia.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Will Deacon <will@kernel.org>, Cornelia Huck <cohuck@redhat.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
Alex Williamson <alex.williamson@redhat.com>,
"Martins, Joao" <joao.m.martins@oracle.com>,
David Woodhouse <dwmw2@infradead.org>,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH RFC 00/19] IOMMUFD Dirty Tracking
Date: Tue, 10 May 2022 10:46:50 -0300 [thread overview]
Message-ID: <20220510134650.GB49344@nvidia.com> (raw)
In-Reply-To: <BN9PR11MB5276AE3C44453F889B100D448CC99@BN9PR11MB5276.namprd11.prod.outlook.com>
On Tue, May 10, 2022 at 01:38:26AM +0000, Tian, Kevin wrote:
> > However, tt costs nothing to have dirty tracking as long as all iommus
> > support it in the system - which seems to be the normal case today.
> >
> > We should just always turn it on at this point.
>
> Then still need a way to report " all iommus support it in the system"
> to userspace since many old systems don't support it at all.
Userspace can query the iommu_domain directly, or 'try and fail' to
turn on tracking.
A device capability flag is useless without a control knob to request
a domain is created with tracking, and we don't have that, or a reason
to add that.
Jason
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WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "Martins, Joao" <joao.m.martins@oracle.com>,
Joerg Roedel <joro@8bytes.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Keqian Zhu <zhukeqian1@huawei.com>,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
David Woodhouse <dwmw2@infradead.org>,
Lu Baolu <baolu.lu@linux.intel.com>,
Nicolin Chen <nicolinc@nvidia.com>,
Yishai Hadas <yishaih@nvidia.com>,
Eric Auger <eric.auger@redhat.com>,
"Liu, Yi L" <yi.l.liu@intel.com>,
Alex Williamson <alex.williamson@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>
Subject: Re: [PATCH RFC 00/19] IOMMUFD Dirty Tracking
Date: Tue, 10 May 2022 10:46:50 -0300 [thread overview]
Message-ID: <20220510134650.GB49344@nvidia.com> (raw)
In-Reply-To: <BN9PR11MB5276AE3C44453F889B100D448CC99@BN9PR11MB5276.namprd11.prod.outlook.com>
On Tue, May 10, 2022 at 01:38:26AM +0000, Tian, Kevin wrote:
> > However, tt costs nothing to have dirty tracking as long as all iommus
> > support it in the system - which seems to be the normal case today.
> >
> > We should just always turn it on at this point.
>
> Then still need a way to report " all iommus support it in the system"
> to userspace since many old systems don't support it at all.
Userspace can query the iommu_domain directly, or 'try and fail' to
turn on tracking.
A device capability flag is useless without a control knob to request
a domain is created with tracking, and we don't have that, or a reason
to add that.
Jason
next prev parent reply other threads:[~2022-05-10 13:46 UTC|newest]
Thread overview: 209+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-28 21:09 [PATCH RFC 00/19] IOMMUFD Dirty Tracking Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 01/19] iommu: Add iommu_domain ops for dirty tracking Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 7:54 ` Tian, Kevin
2022-04-29 7:54 ` Tian, Kevin
2022-04-29 10:44 ` Joao Martins
2022-04-29 10:44 ` Joao Martins
2022-04-29 12:08 ` Jason Gunthorpe via iommu
2022-04-29 12:08 ` Jason Gunthorpe
2022-04-29 14:26 ` Joao Martins
2022-04-29 14:26 ` Joao Martins
2022-04-29 14:35 ` Jason Gunthorpe via iommu
2022-04-29 14:35 ` Jason Gunthorpe
2022-04-29 13:40 ` Baolu Lu
2022-04-29 13:40 ` Baolu Lu
2022-04-29 15:27 ` Joao Martins
2022-04-29 15:27 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 02/19] iommufd: Dirty tracking for io_pagetable Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 8:07 ` Tian, Kevin
2022-04-29 8:07 ` Tian, Kevin
2022-04-29 10:48 ` Joao Martins
2022-04-29 10:48 ` Joao Martins
2022-04-29 11:56 ` Jason Gunthorpe via iommu
2022-04-29 11:56 ` Jason Gunthorpe
2022-04-29 14:28 ` Joao Martins
2022-04-29 14:28 ` Joao Martins
2022-04-29 23:51 ` Baolu Lu
2022-04-29 23:51 ` Baolu Lu
2022-05-02 11:57 ` Joao Martins
2022-05-02 11:57 ` Joao Martins
2022-08-29 10:01 ` Shameerali Kolothum Thodi
2022-04-28 21:09 ` [PATCH RFC 03/19] iommufd: Dirty tracking data support Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 8:12 ` Tian, Kevin
2022-04-29 8:12 ` Tian, Kevin
2022-04-29 10:54 ` Joao Martins
2022-04-29 10:54 ` Joao Martins
2022-04-29 12:09 ` Jason Gunthorpe via iommu
2022-04-29 12:09 ` Jason Gunthorpe
2022-04-29 14:33 ` Joao Martins
2022-04-29 14:33 ` Joao Martins
2022-04-30 4:11 ` Baolu Lu
2022-04-30 4:11 ` Baolu Lu
2022-05-02 12:06 ` Joao Martins
2022-05-02 12:06 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 04/19] iommu: Add an unmap API that returns dirtied IOPTEs Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-30 5:12 ` Baolu Lu
2022-04-30 5:12 ` Baolu Lu
2022-05-02 12:22 ` Joao Martins
2022-05-02 12:22 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 05/19] iommufd: Add a dirty bitmap to iopt_unmap_iova() Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 12:14 ` Jason Gunthorpe via iommu
2022-04-29 12:14 ` Jason Gunthorpe
2022-04-29 14:36 ` Joao Martins
2022-04-29 14:36 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 06/19] iommufd: Dirty tracking IOCTLs for the hw_pagetable Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 07/19] iommufd/vfio-compat: Dirty tracking IOCTLs compatibility Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 12:19 ` Jason Gunthorpe via iommu
2022-04-29 12:19 ` Jason Gunthorpe
2022-04-29 14:27 ` Joao Martins
2022-04-29 14:27 ` Joao Martins
2022-04-29 14:36 ` Jason Gunthorpe via iommu
2022-04-29 14:36 ` Jason Gunthorpe
2022-04-29 14:52 ` Joao Martins
2022-04-29 14:52 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 08/19] iommufd: Add a test for dirty tracking ioctls Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 09/19] iommu/amd: Access/Dirty bit support in IOPTEs Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-05-31 11:34 ` Suravee Suthikulpanit via iommu
2022-05-31 11:34 ` Suravee Suthikulpanit
2022-05-31 12:15 ` Baolu Lu
2022-05-31 12:15 ` Baolu Lu
2022-05-31 15:22 ` Joao Martins
2022-05-31 15:22 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 10/19] iommu/amd: Add unmap_read_dirty() support Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-05-31 12:39 ` Suravee Suthikulpanit via iommu
2022-05-31 12:39 ` Suravee Suthikulpanit
2022-05-31 15:51 ` Joao Martins
2022-05-31 15:51 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 11/19] iommu/amd: Print access/dirty bits if supported Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 12/19] iommu/arm-smmu-v3: Add feature detection for HTTU Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 13/19] iommu/arm-smmu-v3: Add feature detection for BBML Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 11:11 ` Robin Murphy
2022-04-29 11:11 ` Robin Murphy
2022-04-29 11:54 ` Joao Martins
2022-04-29 11:54 ` Joao Martins
2022-04-29 12:26 ` Robin Murphy
2022-04-29 12:26 ` Robin Murphy
2022-04-29 14:34 ` Joao Martins
2022-04-29 14:34 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 14/19] iommu/arm-smmu-v3: Add read_and_clear_dirty() support Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-08-29 9:59 ` Shameerali Kolothum Thodi
2022-04-28 21:09 ` [PATCH RFC 15/19] iommu/arm-smmu-v3: Add set_dirty_tracking_range() support Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 8:28 ` Tian, Kevin
2022-04-29 8:28 ` Tian, Kevin
2022-04-29 11:05 ` Joao Martins
2022-04-29 11:05 ` Joao Martins
2022-04-29 11:19 ` Robin Murphy
2022-04-29 11:19 ` Robin Murphy
2022-04-29 12:06 ` Joao Martins
2022-04-29 12:06 ` Joao Martins
2022-04-29 12:23 ` Jason Gunthorpe via iommu
2022-04-29 12:23 ` Jason Gunthorpe
2022-04-29 14:45 ` Joao Martins
2022-04-29 14:45 ` Joao Martins
2022-04-29 16:11 ` Jason Gunthorpe via iommu
2022-04-29 16:11 ` Jason Gunthorpe
2022-04-29 16:40 ` Joao Martins
2022-04-29 16:40 ` Joao Martins
2022-04-29 16:46 ` Jason Gunthorpe via iommu
2022-04-29 16:46 ` Jason Gunthorpe
2022-04-29 19:20 ` Robin Murphy
2022-04-29 19:20 ` Robin Murphy
2022-05-02 11:52 ` Joao Martins
2022-05-02 11:52 ` Joao Martins
2022-05-02 11:57 ` Joao Martins
2022-05-02 11:57 ` Joao Martins
2022-05-05 7:25 ` Shameerali Kolothum Thodi via iommu
2022-05-05 7:25 ` Shameerali Kolothum Thodi
2022-05-05 9:52 ` Joao Martins
2022-05-05 9:52 ` Joao Martins
2022-08-29 9:59 ` Shameerali Kolothum Thodi
2022-08-29 10:00 ` Shameerali Kolothum Thodi
2022-04-28 21:09 ` [PATCH RFC 16/19] iommu/arm-smmu-v3: Enable HTTU for stage1 with io-pgtable mapping Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 11:35 ` Robin Murphy
2022-04-29 11:35 ` Robin Murphy
2022-04-29 12:10 ` Joao Martins
2022-04-29 12:10 ` Joao Martins
2022-04-29 12:46 ` Robin Murphy
2022-04-29 12:46 ` Robin Murphy
2022-08-29 10:00 ` Shameerali Kolothum Thodi
2022-04-28 21:09 ` [PATCH RFC 17/19] iommu/arm-smmu-v3: Add unmap_read_dirty() support Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 11:53 ` Robin Murphy
2022-04-29 11:53 ` Robin Murphy
2022-04-28 21:09 ` [PATCH RFC 18/19] iommu/intel: Access/Dirty bit support for SL domains Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 9:03 ` Tian, Kevin
2022-04-29 9:03 ` Tian, Kevin
2022-04-29 11:20 ` Joao Martins
2022-04-29 11:20 ` Joao Martins
2022-04-30 6:12 ` Baolu Lu
2022-04-30 6:12 ` Baolu Lu
2022-05-02 12:24 ` Joao Martins
2022-05-02 12:24 ` Joao Martins
2022-04-28 21:09 ` [PATCH RFC 19/19] iommu/intel: Add unmap_read_dirty() support Joao Martins
2022-04-28 21:09 ` Joao Martins
2022-04-29 5:45 ` [PATCH RFC 00/19] IOMMUFD Dirty Tracking Tian, Kevin
2022-04-29 5:45 ` Tian, Kevin
2022-04-29 10:27 ` Joao Martins
2022-04-29 10:27 ` Joao Martins
2022-04-29 12:38 ` Jason Gunthorpe via iommu
2022-04-29 12:38 ` Jason Gunthorpe
2022-04-29 15:20 ` Joao Martins
2022-04-29 15:20 ` Joao Martins
2022-05-05 7:40 ` Tian, Kevin
2022-05-05 7:40 ` Tian, Kevin
2022-05-05 14:07 ` Jason Gunthorpe via iommu
2022-05-05 14:07 ` Jason Gunthorpe
2022-05-06 3:51 ` Tian, Kevin
2022-05-06 3:51 ` Tian, Kevin
2022-05-06 11:46 ` Jason Gunthorpe via iommu
2022-05-06 11:46 ` Jason Gunthorpe
2022-05-10 1:38 ` Tian, Kevin
2022-05-10 1:38 ` Tian, Kevin
2022-05-10 11:50 ` Joao Martins
2022-05-10 11:50 ` Joao Martins
2022-05-11 1:17 ` Tian, Kevin
2022-05-11 1:17 ` Tian, Kevin
2022-05-10 13:46 ` Jason Gunthorpe via iommu [this message]
2022-05-10 13:46 ` Jason Gunthorpe
2022-05-11 1:10 ` Tian, Kevin
2022-05-11 1:10 ` Tian, Kevin
2022-07-12 18:34 ` Joao Martins
2022-07-21 14:24 ` Jason Gunthorpe
2022-05-02 18:11 ` Alex Williamson
2022-05-02 18:11 ` Alex Williamson
2022-05-02 18:52 ` Jason Gunthorpe via iommu
2022-05-02 18:52 ` Jason Gunthorpe
2022-05-03 10:48 ` Joao Martins
2022-05-03 10:48 ` Joao Martins
2022-05-05 7:42 ` Tian, Kevin
2022-05-05 7:42 ` Tian, Kevin
2022-05-05 10:06 ` Joao Martins
2022-05-05 10:06 ` Joao Martins
2022-05-05 11:03 ` Tian, Kevin
2022-05-05 11:03 ` Tian, Kevin
2022-05-05 11:50 ` Joao Martins
2022-05-05 11:50 ` Joao Martins
2022-05-06 3:14 ` Tian, Kevin
2022-05-06 3:14 ` Tian, Kevin
2022-05-05 13:55 ` Jason Gunthorpe via iommu
2022-05-05 13:55 ` Jason Gunthorpe
2022-05-06 3:17 ` Tian, Kevin
2022-05-06 3:17 ` Tian, Kevin
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