From: Jason Gunthorpe <jgg@nvidia.com>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: iommu@lists.linux-foundation.org,
LKML <linux-kernel@vger.kernel.org>,
dmaengine@vger.kernel.org, Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
Lu Baolu <baolu.lu@linux.intel.com>,
Christoph Hellwig <hch@infradead.org>,
vkoul@kernel.org, robin.murphy@arm.com, will@kernel.org,
Yi Liu <yi.l.liu@intel.com>, Dave Jiang <dave.jiang@intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
Raj Ashok <ashok.raj@intel.com>,
Eric Auger <eric.auger@redhat.com>
Subject: Re: [PATCH v4 3/6] iommu/vt-d: Implement domain ops for attach_dev_pasid
Date: Tue, 24 May 2022 18:10:24 -0300 [thread overview]
Message-ID: <20220524211024.GC1343366@nvidia.com> (raw)
In-Reply-To: <20220524134526.409519ac@jacob-builder>
On Tue, May 24, 2022 at 01:45:26PM -0700, Jacob Pan wrote:
> > The idea that there is only one PASID per domain per device is not
> > right.
> >
> Got you, I was under the impression that there is no use case yet for
> multiple PASIDs per device-domain based on our early discussion.
The key word there is "in-kernel" and "DMA API" - iommufd userspace
will do whatever it likes.
I wish you guys would organize your work so adding generic PASID
support to IOMMU was its own series with its own purpose so everything
stops becoming confused with SVA and DMA API ideas that are not
general.
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe via iommu <iommu@lists.linux-foundation.org>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: vkoul@kernel.org, "Tian, Kevin" <kevin.tian@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Raj Ashok <ashok.raj@intel.com>,
will@kernel.org, David Woodhouse <dwmw2@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>,
iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org,
robin.murphy@arm.com,
Jean-Philippe Brucker <jean-philippe@linaro.com>
Subject: Re: [PATCH v4 3/6] iommu/vt-d: Implement domain ops for attach_dev_pasid
Date: Tue, 24 May 2022 18:10:24 -0300 [thread overview]
Message-ID: <20220524211024.GC1343366@nvidia.com> (raw)
In-Reply-To: <20220524134526.409519ac@jacob-builder>
On Tue, May 24, 2022 at 01:45:26PM -0700, Jacob Pan wrote:
> > The idea that there is only one PASID per domain per device is not
> > right.
> >
> Got you, I was under the impression that there is no use case yet for
> multiple PASIDs per device-domain based on our early discussion.
The key word there is "in-kernel" and "DMA API" - iommufd userspace
will do whatever it likes.
I wish you guys would organize your work so adding generic PASID
support to IOMMU was its own series with its own purpose so everything
stops becoming confused with SVA and DMA API ideas that are not
general.
Jason
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2022-05-24 21:10 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 18:21 [PATCH v4 0/6] Enable PASID for DMA API users Jacob Pan
2022-05-18 18:21 ` Jacob Pan
2022-05-18 18:21 ` [PATCH v4 1/6] iommu: Add a per domain PASID for DMA API Jacob Pan
2022-05-18 18:21 ` Jacob Pan
2022-05-19 6:50 ` Baolu Lu
2022-05-19 6:50 ` Baolu Lu
2022-05-24 13:50 ` Jason Gunthorpe
2022-05-24 13:50 ` Jason Gunthorpe via iommu
2022-05-24 15:17 ` Jacob Pan
2022-05-24 15:17 ` Jacob Pan
2022-05-30 12:22 ` Jason Gunthorpe
2022-05-30 12:22 ` Jason Gunthorpe via iommu
2022-05-31 10:12 ` Tian, Kevin
2022-05-31 10:12 ` Tian, Kevin
2022-05-31 12:45 ` Baolu Lu
2022-05-31 12:45 ` Baolu Lu
2022-05-31 16:03 ` Jason Gunthorpe
2022-05-31 16:03 ` Jason Gunthorpe via iommu
2022-05-31 17:29 ` Jacob Pan
2022-05-31 17:29 ` Jacob Pan
2022-05-31 19:05 ` Jason Gunthorpe
2022-05-31 19:05 ` Jason Gunthorpe via iommu
2022-05-31 20:44 ` Jacob Pan
2022-05-31 20:44 ` Jacob Pan
2022-06-01 1:50 ` Tian, Kevin
2022-06-01 1:50 ` Tian, Kevin
2022-06-01 1:43 ` Tian, Kevin
2022-06-01 1:43 ` Tian, Kevin
2022-06-01 9:37 ` Baolu Lu
2022-06-01 9:37 ` Baolu Lu
2022-06-01 10:05 ` Tian, Kevin
2022-06-01 10:05 ` Tian, Kevin
2022-05-18 18:21 ` [PATCH v4 2/6] iommu: Add a helper to do PASID lookup from domain Jacob Pan
2022-05-18 18:21 ` Jacob Pan
2022-05-19 6:41 ` Baolu Lu
2022-05-19 6:41 ` Baolu Lu
2022-05-19 20:10 ` Jacob Pan
2022-05-19 20:10 ` Jacob Pan
2022-05-19 6:48 ` Christoph Hellwig
2022-05-19 6:48 ` Christoph Hellwig
2022-05-20 15:18 ` Jacob Pan
2022-05-20 15:18 ` Jacob Pan
2022-05-23 7:55 ` Tian, Kevin
2022-05-23 7:55 ` Tian, Kevin
2022-05-23 9:14 ` Tian, Kevin
2022-05-23 9:14 ` Tian, Kevin
2022-05-23 18:01 ` Jacob Pan
2022-05-23 18:01 ` Jacob Pan
2022-05-18 18:21 ` [PATCH v4 3/6] iommu/vt-d: Implement domain ops for attach_dev_pasid Jacob Pan
2022-05-18 18:21 ` Jacob Pan
2022-05-24 13:51 ` Jason Gunthorpe
2022-05-24 13:51 ` Jason Gunthorpe via iommu
2022-05-24 16:12 ` Jacob Pan
2022-05-24 16:12 ` Jacob Pan
2022-05-24 18:02 ` Jason Gunthorpe
2022-05-24 18:02 ` Jason Gunthorpe via iommu
2022-05-24 20:45 ` Jacob Pan
2022-05-24 20:45 ` Jacob Pan
2022-05-24 21:10 ` Jason Gunthorpe [this message]
2022-05-24 21:10 ` Jason Gunthorpe via iommu
2022-05-18 18:21 ` [PATCH v4 4/6] iommu: Add PASID support for DMA mapping API users Jacob Pan
2022-05-18 18:21 ` Jacob Pan
2022-05-23 8:25 ` Tian, Kevin
2022-05-23 8:25 ` Tian, Kevin
2022-05-23 15:23 ` Jacob Pan
2022-05-23 15:23 ` Jacob Pan
2022-05-18 18:21 ` [PATCH v4 5/6] dmaengine: idxd: Use DMA API for in-kernel DMA with PASID Jacob Pan
2022-05-18 18:21 ` Jacob Pan
2022-05-18 18:21 ` [PATCH v4 6/6] iommu/vt-d: Delete unused SVM flag Jacob Pan
2022-05-18 18:21 ` Jacob Pan
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