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From: Jason Gunthorpe <jgg@nvidia.com>
To: "Raj, Ashok" <ashok.raj@intel.com>
Cc: "Liu, Yi L" <yi.l.liu@intel.com>,
	"Tian, Kevin" <kevin.tian@intel.com>,
	Jason Wang <jasowang@redhat.com>,
	"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
	"eric.auger@redhat.com" <eric.auger@redhat.com>,
	"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
	"joro@8bytes.org" <joro@8bytes.org>,
	"jacob.jun.pan@linux.intel.com" <jacob.jun.pan@linux.intel.com>,
	"Tian, Jun J" <jun.j.tian@intel.com>,
	"Sun, Yi Y" <yi.y.sun@intel.com>,
	"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
	"peterx@redhat.com" <peterx@redhat.com>,
	"Wu, Hao" <hao.wu@intel.com>,
	"stefanha@gmail.com" <stefanha@gmail.com>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Zhu, Lingshan" <lingshan.zhu@intel.com>
Subject: Re: (proposal) RE: [PATCH v7 00/16] vfio: expose virtual Shared Virtual Addressing to VMs
Date: Wed, 21 Oct 2020 08:48:29 -0300	[thread overview]
Message-ID: <20201021114829.GR6219@nvidia.com> (raw)
In-Reply-To: <20201020202713.GF86371@otc-nc-03>

On Tue, Oct 20, 2020 at 01:27:13PM -0700, Raj, Ashok wrote:
> On Tue, Oct 20, 2020 at 05:14:03PM -0300, Jason Gunthorpe wrote:
> > On Tue, Oct 20, 2020 at 01:08:44PM -0700, Raj, Ashok wrote:
> > > On Tue, Oct 20, 2020 at 04:55:57PM -0300, Jason Gunthorpe wrote:
> > > > On Tue, Oct 20, 2020 at 12:51:46PM -0700, Raj, Ashok wrote:
> > > > > I think we agreed (or agree to disagree and commit) for device types that 
> > > > > we have for SIOV, VFIO based approach works well without having to re-invent 
> > > > > another way to do the same things. Not looking for a shortcut by any means, 
> > > > > but we need to plan around existing hardware though. Looks like vDPA took 
> > > > > some shortcuts then to not abstract iommu uAPI instead :-)? When all
> > > > > necessary hardware was available.. This would be a solved puzzle. 
> > > > 
> > > > I think it is the opposite, vIOMMU and related has outgrown VFIO as
> > > > the "home" and needs to stand alone.
> > > > 
> > > > Apparently the HW that will need PASID for vDPA is Intel HW, so if
> > > 
> > > So just to make this clear, I did check internally if there are any plans
> > > for vDPA + SVM. There are none at the moment. 
> > 
> > Not SVM, SIOV.
> 
> ... And that included.. I should have said vDPA + PASID, No current plans. 
> I have no idea who set expectations with you. Can you please put me in touch 
> with that person, privately is fine.

It was the team that aruged VDPA had to be done through VFIO - SIOV
and PASID was one of their reasons it had to be VFIO, check the list
archives

If they didn't plan to use it, bit of a strawman argument, right?

Jason

WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: "Raj, Ashok" <ashok.raj@intel.com>
Cc: "Tian, Jun J" <jun.j.tian@intel.com>,
	"Tian, Kevin" <kevin.tian@intel.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
	"stefanha@gmail.com" <stefanha@gmail.com>,
	Jason Wang <jasowang@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Sun, Yi Y" <yi.y.sun@intel.com>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
	"Zhu, Lingshan" <lingshan.zhu@intel.com>,
	"Wu, Hao" <hao.wu@intel.com>
Subject: Re: (proposal) RE: [PATCH v7 00/16] vfio: expose virtual Shared Virtual Addressing to VMs
Date: Wed, 21 Oct 2020 08:48:29 -0300	[thread overview]
Message-ID: <20201021114829.GR6219@nvidia.com> (raw)
In-Reply-To: <20201020202713.GF86371@otc-nc-03>

On Tue, Oct 20, 2020 at 01:27:13PM -0700, Raj, Ashok wrote:
> On Tue, Oct 20, 2020 at 05:14:03PM -0300, Jason Gunthorpe wrote:
> > On Tue, Oct 20, 2020 at 01:08:44PM -0700, Raj, Ashok wrote:
> > > On Tue, Oct 20, 2020 at 04:55:57PM -0300, Jason Gunthorpe wrote:
> > > > On Tue, Oct 20, 2020 at 12:51:46PM -0700, Raj, Ashok wrote:
> > > > > I think we agreed (or agree to disagree and commit) for device types that 
> > > > > we have for SIOV, VFIO based approach works well without having to re-invent 
> > > > > another way to do the same things. Not looking for a shortcut by any means, 
> > > > > but we need to plan around existing hardware though. Looks like vDPA took 
> > > > > some shortcuts then to not abstract iommu uAPI instead :-)? When all
> > > > > necessary hardware was available.. This would be a solved puzzle. 
> > > > 
> > > > I think it is the opposite, vIOMMU and related has outgrown VFIO as
> > > > the "home" and needs to stand alone.
> > > > 
> > > > Apparently the HW that will need PASID for vDPA is Intel HW, so if
> > > 
> > > So just to make this clear, I did check internally if there are any plans
> > > for vDPA + SVM. There are none at the moment. 
> > 
> > Not SVM, SIOV.
> 
> ... And that included.. I should have said vDPA + PASID, No current plans. 
> I have no idea who set expectations with you. Can you please put me in touch 
> with that person, privately is fine.

It was the team that aruged VDPA had to be done through VFIO - SIOV
and PASID was one of their reasons it had to be VFIO, check the list
archives

If they didn't plan to use it, bit of a strawman argument, right?

Jason
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  reply	other threads:[~2020-10-21 11:48 UTC|newest]

Thread overview: 110+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-12  8:38 (proposal) RE: [PATCH v7 00/16] vfio: expose virtual Shared Virtual Addressing to VMs Tian, Kevin
2020-10-12  8:38 ` Tian, Kevin
2020-10-13  6:22 ` Jason Wang
2020-10-13  6:22   ` Jason Wang
2020-10-14  3:08   ` Tian, Kevin
2020-10-14  3:08     ` Tian, Kevin
2020-10-14 23:10     ` Alex Williamson
2020-10-14 23:10       ` Alex Williamson
2020-10-15  7:02       ` Jason Wang
2020-10-15  7:02         ` Jason Wang
2020-10-15  6:52     ` Jason Wang
2020-10-15  6:52       ` Jason Wang
2020-10-15  7:58       ` Tian, Kevin
2020-10-15  7:58         ` Tian, Kevin
2020-10-15  8:40         ` Jason Wang
2020-10-15  8:40           ` Jason Wang
2020-10-15 10:14           ` Liu, Yi L
2020-10-15 10:14             ` Liu, Yi L
2020-10-20  6:18             ` Jason Wang
2020-10-20  6:18               ` Jason Wang
2020-10-20  8:19               ` Liu, Yi L
2020-10-20  8:19                 ` Liu, Yi L
2020-10-20  9:19                 ` Jason Wang
2020-10-20  9:19                   ` Jason Wang
2020-10-20  9:40                   ` Liu, Yi L
2020-10-20  9:40                     ` Liu, Yi L
2020-10-20 13:54                     ` Jason Gunthorpe
2020-10-20 13:54                       ` Jason Gunthorpe
2020-10-20 14:00                       ` Liu, Yi L
2020-10-20 14:00                         ` Liu, Yi L
2020-10-20 14:05                         ` Jason Gunthorpe
2020-10-20 14:05                           ` Jason Gunthorpe
2020-10-20 14:09                           ` Liu, Yi L
2020-10-20 14:09                             ` Liu, Yi L
2020-10-13 10:27 ` Jean-Philippe Brucker
2020-10-13 10:27   ` Jean-Philippe Brucker
2020-10-14  2:11   ` Tian, Kevin
2020-10-14  2:11     ` Tian, Kevin
2020-10-14  3:16 ` Tian, Kevin
2020-10-14  3:16   ` Tian, Kevin
2020-10-16 15:36   ` Jason Gunthorpe
2020-10-16 15:36     ` Jason Gunthorpe
2020-10-19  8:39     ` Liu, Yi L
2020-10-19  8:39       ` Liu, Yi L
2020-10-19 14:25       ` Jason Gunthorpe
2020-10-19 14:25         ` Jason Gunthorpe
2020-10-20 10:21         ` Liu, Yi L
2020-10-20 10:21           ` Liu, Yi L
2020-10-20 14:02           ` Jason Gunthorpe
2020-10-20 14:02             ` Jason Gunthorpe
2020-10-20 14:19             ` Liu, Yi L
2020-10-20 14:19               ` Liu, Yi L
2020-10-21  2:21               ` Jason Wang
2020-10-21  2:21                 ` Jason Wang
2020-10-20 16:24             ` Raj, Ashok
2020-10-20 16:24               ` Raj, Ashok
2020-10-20 17:03               ` Jason Gunthorpe
2020-10-20 17:03                 ` Jason Gunthorpe
2020-10-20 19:51                 ` Raj, Ashok
2020-10-20 19:51                   ` Raj, Ashok
2020-10-20 19:55                   ` Jason Gunthorpe
2020-10-20 19:55                     ` Jason Gunthorpe
2020-10-20 20:08                     ` Raj, Ashok
2020-10-20 20:08                       ` Raj, Ashok
2020-10-20 20:14                       ` Jason Gunthorpe
2020-10-20 20:14                         ` Jason Gunthorpe
2020-10-20 20:27                         ` Raj, Ashok
2020-10-20 20:27                           ` Raj, Ashok
2020-10-21 11:48                           ` Jason Gunthorpe [this message]
2020-10-21 11:48                             ` Jason Gunthorpe
2020-10-21 17:51                             ` Raj, Ashok
2020-10-21 17:51                               ` Raj, Ashok
2020-10-21 18:24                               ` Jason Gunthorpe
2020-10-21 18:24                                 ` Jason Gunthorpe
2020-10-21 20:03                                 ` Raj, Ashok
2020-10-21 20:03                                   ` Raj, Ashok
2020-10-21 23:32                                   ` Jason Gunthorpe
2020-10-21 23:32                                     ` Jason Gunthorpe
2020-10-21 23:53                                     ` Raj, Ashok
2020-10-21 23:53                                       ` Raj, Ashok
2020-10-22  2:55                               ` Jason Wang
2020-10-22  2:55                                 ` Jason Wang
2020-10-22  3:54                                 ` Liu, Yi L
2020-10-22  3:54                                   ` Liu, Yi L
2020-10-22  4:38                                   ` Jason Wang
2020-10-22  4:38                                     ` Jason Wang
2020-11-03  9:52 ` joro
2020-11-03  9:52   ` joro
2020-11-03 12:56   ` Jason Gunthorpe
2020-11-03 12:56     ` Jason Gunthorpe
2020-11-03 13:18     ` joro
2020-11-03 13:18       ` joro
2020-11-03 13:23       ` Jason Gunthorpe
2020-11-03 13:23         ` Jason Gunthorpe
2020-11-03 14:03         ` joro
2020-11-03 14:03           ` joro
2020-11-03 14:06           ` Jason Gunthorpe
2020-11-03 14:06             ` Jason Gunthorpe
2020-11-03 14:35             ` joro
2020-11-03 14:35               ` joro
2020-11-03 15:22               ` Jason Gunthorpe
2020-11-03 15:22                 ` Jason Gunthorpe
2020-11-03 16:55                 ` joro
2020-11-03 16:55                   ` joro
2020-11-03 17:48                   ` Jason Gunthorpe
2020-11-03 17:48                     ` Jason Gunthorpe
2020-11-03 19:14                     ` joro
2020-11-03 19:14                       ` joro
2020-11-04 19:29                       ` Jason Gunthorpe
2020-11-04 19:29                         ` Jason Gunthorpe

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