From: Jason Gunthorpe <jgg@nvidia.com>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>,
Christoph Hellwig <hch@infradead.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Kevin Tian <kevin.tian@intel.com>,
Ashok Raj <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
Dave Jiang <dave.jiang@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>, Vinod Koul <vkoul@kernel.org>,
Eric Auger <eric.auger@redhat.com>, Liu Yi L <yi.l.liu@intel.com>,
Jacob jun Pan <jacob.jun.pan@intel.com>,
Zhangfei Gao <zhangfei.gao@linaro.org>,
Zhu Tony <tony.zhu@intel.com>,
iommu@lists.linux.dev, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org,
Jean-Philippe Brucker <jean-philippe@linaro.org>
Subject: Re: [PATCH v13 05/13] iommu: Add attach/detach_dev_pasid iommu interfaces
Date: Thu, 22 Sep 2022 12:49:43 -0300 [thread overview]
Message-ID: <YyyEF7+SZtj8vUtQ@nvidia.com> (raw)
In-Reply-To: <20220906124458.46461-6-baolu.lu@linux.intel.com>
On Tue, Sep 06, 2022 at 08:44:50PM +0800, Lu Baolu wrote:
> Attaching an IOMMU domain to a PASID of a device is a generic operation
> for modern IOMMU drivers which support PASID-granular DMA address
> translation. Currently visible usage scenarios include (but not limited):
>
> - SVA (Shared Virtual Address)
> - kernel DMA with PASID
> - hardware-assist mediated device
>
> This adds the set_dev_pasid domain ops for setting the domain onto a
> PASID of a device and remove_dev_pasid iommu ops for removing any setup
> on a PASID of device. This also adds interfaces for device drivers to
> attach/detach/retrieve a domain for a PASID of a device.
>
> If multiple devices share a single group, it's fine as long the fabric
> always routes every TLP marked with a PASID to the host bridge and only
> the host bridge. For example, ACS achieves this universally and has been
> checked when pci_enable_pasid() is called. As we can't reliably tell the
> source apart in a group, all the devices in a group have to be considered
> as the same source, and mapped to the same PASID table.
>
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> Reviewed-by: Yi Liu <yi.l.liu@intel.com>
> Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
> Tested-by: Tony Zhu <tony.zhu@intel.com>
> ---
> include/linux/iommu.h | 32 +++++++++++
> drivers/iommu/iommu.c | 130 ++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 162 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2022-09-22 15:50 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 12:44 [PATCH v13 00/13] iommu: SVA and IOPF refactoring Lu Baolu
2022-09-06 12:44 ` [PATCH v13 01/13] iommu: Add max_pasids field in struct iommu_device Lu Baolu
2022-09-06 12:44 ` [PATCH v13 02/13] iommu: Add max_pasids field in struct dev_iommu Lu Baolu
2022-09-06 12:44 ` [PATCH v13 03/13] iommu: Remove SVM_FLAG_SUPERVISOR_MODE support Lu Baolu
2022-09-06 12:44 ` [PATCH v13 04/13] PCI: Enable PASID only when ACS RR & UF enabled on upstream path Lu Baolu
2022-09-06 12:44 ` [PATCH v13 05/13] iommu: Add attach/detach_dev_pasid iommu interfaces Lu Baolu
2022-09-22 15:49 ` Jason Gunthorpe [this message]
2022-09-06 12:44 ` [PATCH v13 06/13] iommu: Add IOMMU SVA domain support Lu Baolu
2022-09-06 12:44 ` [PATCH v13 07/13] iommu/vt-d: Add " Lu Baolu
2022-09-22 15:49 ` Jason Gunthorpe
2022-09-23 2:21 ` Baolu Lu
2022-09-23 12:15 ` Jason Gunthorpe
2022-09-23 12:41 ` Baolu Lu
2022-09-23 13:07 ` Jason Gunthorpe
2022-09-23 13:12 ` Baolu Lu
2022-09-06 12:44 ` [PATCH v13 08/13] arm-smmu-v3/sva: " Lu Baolu
2022-09-22 15:53 ` Jason Gunthorpe
2022-09-06 12:44 ` [PATCH v13 09/13] iommu/sva: Refactoring iommu_sva_bind/unbind_device() Lu Baolu
2022-09-06 16:36 ` Jean-Philippe Brucker
2022-09-07 1:27 ` Baolu Lu
2022-09-07 9:54 ` Jean-Philippe Brucker
2022-09-07 17:33 ` Jason Gunthorpe
2022-09-08 16:25 ` Jean-Philippe Brucker
2022-09-08 16:41 ` Jason Gunthorpe
2022-09-09 1:54 ` Baolu Lu
2022-09-22 16:00 ` Jason Gunthorpe
2022-09-23 2:31 ` Baolu Lu
2022-09-06 12:44 ` [PATCH v13 10/13] iommu: Remove SVA related callbacks from iommu ops Lu Baolu
2022-09-06 12:44 ` [PATCH v13 11/13] iommu: Prepare IOMMU domain for IOPF Lu Baolu
2022-09-22 16:05 ` Jason Gunthorpe
2022-09-06 12:44 ` [PATCH v13 12/13] iommu: Per-domain I/O page fault handling Lu Baolu
2022-09-06 12:44 ` [PATCH v13 13/13] iommu: Rename iommu-sva-lib.{c,h} Lu Baolu
2022-09-12 3:05 ` [PATCH v13 00/13] iommu: SVA and IOPF refactoring Baolu Lu
2022-09-23 13:08 ` Baolu Lu
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