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From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
To: Alex Williamson <alex.williamson@redhat.com>,
	Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: "iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Joerg Roedel <joro@8bytes.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Rafael Wysocki <rafael.j.wysocki@intel.com>,
	Lan Tianyu <tianyu.lan@intel.com>,
	Jean Delvare <khali@linux-fr.org>,
	Will Deacon <Will.Deacon@arm.com>,
	"Kumar, Sanjay K" <sanjay.k.kumar@intel.com>
Subject: Re: [PATCH v3 15/16] iommu: introduce page response function
Date: Fri, 8 Dec 2017 13:52:00 +0000	[thread overview]
Message-ID: <b0976bc9-68c8-f5c9-881b-5913a4ca1970@arm.com> (raw)
In-Reply-To: <20171207145121.23b3f26f@t450s.home>

On 07/12/17 21:51, Alex Williamson wrote:
>> Agree, IOMMU driver cannot enforce it. I think VFIO layer can make sure
>> page response come from the assigned device and its guest/container.
> 
> Can we enforce it via the IOMMU/VFIO interface?  If the response is for
> a struct device, and not an rid/did embedded in a structure, then vfio
> can pass it through w/o worrying about it, ie. response comes in via
> ioctl with association to vfio device fd -> struct vfio_device -> struct
> device, iommu driver fills in rid/did.  Thanks,

Yes that's probably the best way, reporting faults and receiving responses
on the device fd.

Thanks,
Jean

  reply	other threads:[~2017-12-08 13:48 UTC|newest]

Thread overview: 94+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-17 18:54 [PATCH v3 00/16] [PATCH v3 00/16] IOMMU driver support for SVM virtualization Jacob Pan
2017-11-17 18:54 ` Jacob Pan
2017-11-17 18:54 ` [PATCH v3 01/16] iommu: introduce bind_pasid_table API function Jacob Pan
2017-11-17 18:54   ` Jacob Pan
2017-11-24 12:04   ` Jean-Philippe Brucker
2017-11-29 22:01     ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 02/16] iommu/vt-d: add bind_pasid_table function Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 03/16] iommu: introduce iommu invalidate API function Jacob Pan
2017-11-24 12:04   ` Jean-Philippe Brucker
2017-12-15 19:02     ` Jean-Philippe Brucker
2017-12-15 19:02       ` Jean-Philippe Brucker
2017-12-28 19:25     ` Jacob Pan
2017-12-28 19:25       ` Jacob Pan
2018-01-10 12:00       ` Jean-Philippe Brucker
2018-01-10 12:00         ` Jean-Philippe Brucker
2017-11-17 18:55 ` [PATCH v3 04/16] iommu/vt-d: move device_domain_info to header Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 05/16] iommu/vt-d: support flushing more TLB types Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-11-20 14:20   ` Lukoshkov, Maksim
2017-11-20 14:20     ` Lukoshkov, Maksim
2017-11-20 18:40     ` Jacob Pan
2017-11-20 18:40       ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 06/16] iommu/vt-d: add svm/sva invalidate function Jacob Pan
2017-12-05  5:43   ` Lu Baolu
2017-12-05  5:43     ` Lu Baolu
2017-11-17 18:55 ` [PATCH v3 07/16] iommu/vt-d: assign PFSID in device TLB invalidation Jacob Pan
2017-12-05  5:45   ` Lu Baolu
2017-11-17 18:55 ` [PATCH v3 08/16] iommu: introduce device fault data Jacob Pan
2017-11-24 12:03   ` Jean-Philippe Brucker
2017-11-29 21:55     ` Jacob Pan
2017-11-29 21:55       ` Jacob Pan
2018-01-10 11:41   ` Jean-Philippe Brucker
2018-01-11 21:10     ` Jacob Pan
2018-01-11 21:10       ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 09/16] driver core: add iommu device fault reporting data Jacob Pan
2017-12-18 14:37   ` Greg Kroah-Hartman
2017-12-18 14:37     ` Greg Kroah-Hartman
2017-11-17 18:55 ` [PATCH v3 10/16] iommu: introduce device fault report API Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-12-05  6:22   ` Lu Baolu
2017-12-08 21:22     ` Jacob Pan
2017-12-08 21:22       ` Jacob Pan
2017-12-07 21:27   ` Alex Williamson
2017-12-07 21:27     ` Alex Williamson
2017-12-08 20:23     ` Jacob Pan
2017-12-08 20:23       ` Jacob Pan
2017-12-08 20:59       ` Alex Williamson
2017-12-08 20:59         ` Alex Williamson
2017-12-08 21:22         ` Jacob Pan
2017-12-08 21:22           ` Jacob Pan
2018-01-10 12:39   ` Jean-Philippe Brucker
2018-01-18 19:24   ` Jean-Philippe Brucker
2018-01-23 20:01     ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 11/16] iommu/vt-d: use threaded irq for dmar_fault Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 12/16] iommu/vt-d: report unrecoverable device faults Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-12-05  6:34   ` Lu Baolu
2017-12-05  6:34     ` Lu Baolu
2017-11-17 18:55 ` [PATCH v3 13/16] iommu/intel-svm: notify page request to guest Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-12-05  7:37   ` Lu Baolu
2017-12-05  7:37     ` Lu Baolu
2017-11-17 18:55 ` [PATCH v3 14/16] iommu/intel-svm: replace dev ops with fault report API Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-11-17 18:55 ` [PATCH v3 15/16] iommu: introduce page response function Jacob Pan
2017-11-17 18:55   ` Jacob Pan
2017-11-24 12:03   ` Jean-Philippe Brucker
2017-12-04 21:37     ` Jacob Pan
2017-12-04 21:37       ` Jacob Pan
2017-12-05 17:21       ` Jean-Philippe Brucker
2017-12-05 17:21         ` Jean-Philippe Brucker
2017-12-06 19:25         ` Jacob Pan
2017-12-06 19:25           ` Jacob Pan
2017-12-07 12:56           ` Jean-Philippe Brucker
2017-12-07 12:56             ` Jean-Philippe Brucker
2017-12-07 21:56             ` Alex Williamson
2017-12-08 13:51               ` Jean-Philippe Brucker
2017-12-08 13:51                 ` Jean-Philippe Brucker
2017-12-08  1:17             ` Jacob Pan
2017-12-08  1:17               ` Jacob Pan
2017-12-08 13:51               ` Jean-Philippe Brucker
2017-12-08 13:51                 ` Jean-Philippe Brucker
2017-12-07 21:51           ` Alex Williamson
2017-12-07 21:51             ` Alex Williamson
2017-12-08 13:52             ` Jean-Philippe Brucker [this message]
2017-12-08 20:40               ` Jacob Pan
2017-12-08 20:40                 ` Jacob Pan
2017-12-08 23:01                 ` Alex Williamson
2017-12-08 23:01                   ` Alex Williamson
2017-11-17 18:55 ` [PATCH v3 16/16] iommu/vt-d: add intel iommu " Jacob Pan
2017-11-17 18:55   ` Jacob Pan

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