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 1/6] iommu: Add a per domain PASID for DMA API
Date: Tue, 24 May 2022 10:50:34 -0300 [thread overview]
Message-ID: <20220524135034.GU1343366@nvidia.com> (raw)
In-Reply-To: <20220518182120.1136715-2-jacob.jun.pan@linux.intel.com>
On Wed, May 18, 2022 at 11:21:15AM -0700, Jacob Pan wrote:
> DMA requests tagged with PASID can target individual IOMMU domains.
> Introduce a domain-wide PASID for DMA API, it will be used on the same
> mapping as legacy DMA without PASID. Let it be IOVA or PA in case of
> identity domain.
Huh? I can't understand what this is trying to say or why this patch
makes sense.
We really should not have pasid's like this attached to the domains..
Jason
next prev parent reply other threads:[~2022-05-24 13:50 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 [this message]
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
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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