From: Jason Gunthorpe <jgg@nvidia.com>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Baolu Lu <baolu.lu@linux.intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
"dmaengine@vger.kernel.org" <dmaengine@vger.kernel.org>,
Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
Christoph Hellwig <hch@infradead.org>,
"vkoul@kernel.org" <vkoul@kernel.org>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"will@kernel.org" <will@kernel.org>,
"Liu, Yi L" <yi.l.liu@intel.com>,
"Jiang, Dave" <dave.jiang@intel.com>,
"Raj, Ashok" <ashok.raj@intel.com>,
Eric Auger <eric.auger@redhat.com>
Subject: Re: [PATCH v4 1/6] iommu: Add a per domain PASID for DMA API
Date: Tue, 31 May 2022 16:05:50 -0300 [thread overview]
Message-ID: <20220531190550.GK1343366@nvidia.com> (raw)
In-Reply-To: <20220531102955.6618b540@jacob-builder>
On Tue, May 31, 2022 at 10:29:55AM -0700, Jacob Pan wrote:
> The reason why I store PASID at IOMMU domain is for IOTLB flush within the
> domain. Device driver is not aware of domain level IOTLB flush. We also
> have iova_cookie for each domain which essentially is for RIDPASID.
You need to make the PASID stuff work generically.
The domain needs to hold a list of all the places it needs to flush
and that list needs to be maintained during attach/detach.
A single PASID on the domain is obviously never going to work
generically.
Jason
next prev parent reply other threads:[~2022-05-31 19:05 UTC|newest]
Thread overview: 35+ 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 ` [PATCH v4 1/6] iommu: Add a per domain PASID for DMA API Jacob Pan
2022-05-19 6:50 ` Baolu Lu
2022-05-24 13:50 ` Jason Gunthorpe
2022-05-24 15:17 ` Jacob Pan
2022-05-30 12:22 ` Jason Gunthorpe
2022-05-31 10:12 ` Tian, Kevin
2022-05-31 12:45 ` Baolu Lu
2022-05-31 16:03 ` Jason Gunthorpe
2022-05-31 17:29 ` Jacob Pan
2022-05-31 19:05 ` Jason Gunthorpe [this message]
2022-05-31 20:44 ` Jacob Pan
2022-06-01 1:50 ` Tian, Kevin
2022-06-01 1:43 ` Tian, Kevin
2022-06-01 9:37 ` Baolu Lu
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
2022-05-19 6:41 ` Baolu Lu
2022-05-19 20:10 ` Jacob Pan
2022-05-19 6:48 ` Christoph Hellwig
2022-05-20 15:18 ` Jacob Pan
2022-05-23 7:55 ` Tian, Kevin
2022-05-23 9:14 ` Tian, Kevin
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
2022-05-24 13:51 ` Jason Gunthorpe
2022-05-24 16:12 ` Jacob Pan
2022-05-24 18:02 ` Jason Gunthorpe
2022-05-24 20:45 ` Jacob Pan
2022-05-24 21:10 ` Jason Gunthorpe
2022-05-18 18:21 ` [PATCH v4 4/6] iommu: Add PASID support for DMA mapping API users Jacob Pan
2022-05-23 8:25 ` Tian, Kevin
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 ` [PATCH v4 6/6] iommu/vt-d: Delete unused SVM flag Jacob Pan
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