From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Kalra, Ashish" <Ashish.Kalra@cavium.com>
Cc: "peter.maydell@linaro.org" <peter.maydell@linaro.org>,
"kevin.tian@intel.com" <kevin.tian@intel.com>,
"drjones@redhat.com" <drjones@redhat.com>,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
"tn@semihalf.com" <tn@semihalf.com>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Auger Eric <eric.auger@redhat.com>,
"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
Bharat Bhushan <bharat.bhushan@nxp.com>,
"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>,
"eric.auger.pro@gmail.com" <eric.auger.pro@gmail.com>
Subject: Re: [Qemu-arm] [Qemu-devel] [RFC v2 0/8] VIRTIO-IOMMU device
Date: Fri, 7 Jul 2017 02:29:51 +0300 [thread overview]
Message-ID: <20170707022732-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <BN4PR07MB2161B5CCE84496804B848326E3D50@BN4PR07MB2161.namprd07.prod.outlook.com>
On Thu, Jul 06, 2017 at 11:23:41PM +0000, Kalra, Ashish wrote:
> I have a generic question on vIOMMU support, is there any proposal/plan to add ATS/PRI extension support to vIOMMUs and allow
> handling for end to end (v)IOMMU Page faults (w/t the device side implementation on Vhost) ?
>
> Again, the motivation will be to do DMA on paged guest memory and potentially avoiding the requirement of pinned/locked
> guest physical memory for DMA.
>
> Thanks,
> Ashish
If that's your goal, first step would be support in VFIO.
End to end would only be helpful when running userspace
drivers within guest, or nested virt.
--
MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Kalra, Ashish" <Ashish.Kalra@cavium.com>
Cc: Auger Eric <eric.auger@redhat.com>,
Bharat Bhushan <bharat.bhushan@nxp.com>,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
"eric.auger.pro@gmail.com" <eric.auger.pro@gmail.com>,
"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"kevin.tian@intel.com" <kevin.tian@intel.com>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
"tn@semihalf.com" <tn@semihalf.com>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"drjones@redhat.com" <drjones@redhat.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>
Subject: Re: [Qemu-devel] [Qemu-arm] [RFC v2 0/8] VIRTIO-IOMMU device
Date: Fri, 7 Jul 2017 02:29:51 +0300 [thread overview]
Message-ID: <20170707022732-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <BN4PR07MB2161B5CCE84496804B848326E3D50@BN4PR07MB2161.namprd07.prod.outlook.com>
On Thu, Jul 06, 2017 at 11:23:41PM +0000, Kalra, Ashish wrote:
> I have a generic question on vIOMMU support, is there any proposal/plan to add ATS/PRI extension support to vIOMMUs and allow
> handling for end to end (v)IOMMU Page faults (w/t the device side implementation on Vhost) ?
>
> Again, the motivation will be to do DMA on paged guest memory and potentially avoiding the requirement of pinned/locked
> guest physical memory for DMA.
>
> Thanks,
> Ashish
If that's your goal, first step would be support in VFIO.
End to end would only be helpful when running userspace
drivers within guest, or nested virt.
--
MST
next prev parent reply other threads:[~2017-07-06 23:30 UTC|newest]
Thread overview: 145+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-07 16:01 [Qemu-arm] [RFC v2 0/8] VIRTIO-IOMMU device Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 1/8] update-linux-headers: import virtio_iommu.h Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 2/8] linux-headers: Update for virtio-iommu Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-07 16:01 ` [Qemu-devel] [RFC v2 3/8] virtio_iommu: add skeleton Eric Auger
2017-06-07 16:01 ` Eric Auger
2017-06-08 11:09 ` Bharat Bhushan
2017-06-08 11:09 ` Bharat Bhushan
2017-06-23 16:08 ` [Qemu-arm] " Jean-Philippe Brucker
2017-06-23 16:08 ` [Qemu-devel] " Jean-Philippe Brucker
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 4/8] virtio-iommu: Decode the command payload Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 5/8] virtio_iommu: Add the iommu regions Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-12 5:59 ` [Qemu-arm] " Bharat Bhushan
2017-06-12 5:59 ` [Qemu-devel] " Bharat Bhushan
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 6/8] virtio-iommu: Implement the translation and commands Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-23 16:09 ` [Qemu-arm] " Jean-Philippe Brucker
2017-06-23 16:09 ` [Qemu-devel] " Jean-Philippe Brucker
2017-07-04 9:13 ` [Qemu-arm] " Bharat Bhushan
2017-07-04 9:13 ` [Qemu-devel] " Bharat Bhushan
2017-07-05 6:40 ` [Qemu-arm] " Auger Eric
2017-07-05 6:40 ` Auger Eric
2017-07-14 2:17 ` [Qemu-arm] " Peter Xu
2017-07-14 2:17 ` Peter Xu
2017-07-14 6:40 ` [Qemu-arm] " Bharat Bhushan
2017-07-14 6:40 ` Bharat Bhushan
2017-07-17 1:28 ` [Qemu-arm] " Peter Xu
2017-07-17 1:28 ` Peter Xu
2017-07-31 13:08 ` [Qemu-arm] " Auger Eric
2017-07-31 13:08 ` Auger Eric
2017-08-03 10:48 ` [Qemu-arm] " Bharat Bhushan
2017-08-03 10:48 ` Bharat Bhushan
2017-07-14 11:25 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-14 11:25 ` Jean-Philippe Brucker
2017-07-17 1:37 ` [Qemu-arm] " Peter Xu
2017-07-17 1:37 ` Peter Xu
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 7/8] hw/arm/virt: Add 2.10 machine type Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-07 16:01 ` [Qemu-arm] [RFC v2 8/8] hw/arm/virt: Add virtio-iommu the virt board Eric Auger
2017-06-07 16:01 ` [Qemu-devel] " Eric Auger
2017-06-09 6:16 ` [Qemu-arm] [RFC v2 0/8] VIRTIO-IOMMU device Bharat Bhushan
2017-06-09 6:16 ` [Qemu-devel] " Bharat Bhushan
2017-06-09 6:43 ` [Qemu-arm] " Auger Eric
2017-06-09 6:43 ` [Qemu-devel] " Auger Eric
2017-06-09 11:30 ` [Qemu-arm] " Bharat Bhushan
2017-06-09 11:30 ` [Qemu-devel] " Bharat Bhushan
2017-06-09 11:53 ` [Qemu-arm] " Auger Eric
2017-06-09 11:53 ` Auger Eric
2017-06-19 7:54 ` [Qemu-arm] " Bharat Bhushan
2017-06-19 7:54 ` Bharat Bhushan
2017-06-19 10:15 ` [Qemu-arm] " Jean-Philippe Brucker
2017-06-19 10:15 ` Jean-Philippe Brucker
2017-06-26 8:22 ` [Qemu-arm] " Auger Eric
2017-06-26 8:22 ` Auger Eric
2017-06-26 16:13 ` [Qemu-arm] " Jean-Philippe Brucker
2017-06-26 16:13 ` Jean-Philippe Brucker
2017-06-27 6:38 ` [Qemu-arm] " Auger Eric
2017-06-27 6:38 ` Auger Eric
2017-06-27 8:46 ` [Qemu-arm] " Will Deacon
2017-06-27 8:46 ` Will Deacon
2017-06-27 8:59 ` [Qemu-arm] " Auger Eric
2017-06-27 8:59 ` Auger Eric
2017-07-05 7:25 ` Tian, Kevin
2017-07-05 7:25 ` Tian, Kevin
2017-07-05 12:44 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-05 12:44 ` Jean-Philippe Brucker
2017-07-05 7:14 ` Tian, Kevin
2017-07-05 7:14 ` Tian, Kevin
2017-07-05 12:44 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-05 12:44 ` Jean-Philippe Brucker
2017-07-07 6:21 ` [Qemu-arm] " Tian, Kevin
2017-07-07 6:21 ` Tian, Kevin
2017-07-07 15:15 ` Jean-Philippe Brucker
2017-07-07 15:15 ` Jean-Philippe Brucker
2017-07-14 7:20 ` [Qemu-arm] " Tian, Kevin
2017-07-14 7:20 ` Tian, Kevin
2017-07-14 11:25 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-14 11:25 ` Jean-Philippe Brucker
2017-07-17 2:20 ` [Qemu-arm] " Tian, Kevin
2017-07-17 2:20 ` Tian, Kevin
2017-07-05 7:15 ` [Qemu-arm] " Bharat Bhushan
2017-07-05 7:15 ` Bharat Bhushan
2017-06-26 7:54 ` [Qemu-arm] " Auger Eric
2017-06-26 7:54 ` Auger Eric
2017-07-05 8:23 ` [Qemu-arm] " Bharat Bhushan
2017-07-05 8:23 ` Bharat Bhushan
2017-07-05 8:44 ` [Qemu-arm] " Auger Eric
2017-07-05 8:44 ` Auger Eric
2017-07-05 8:49 ` [Qemu-arm] " Bharat Bhushan
2017-07-05 8:49 ` Bharat Bhushan
2017-07-06 10:02 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-06 10:02 ` Jean-Philippe Brucker
2017-07-06 11:24 ` [Qemu-arm] " Bharat Bhushan
2017-07-06 11:24 ` Bharat Bhushan
2017-07-06 11:55 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-06 11:55 ` Jean-Philippe Brucker
2017-07-06 21:16 ` [Qemu-arm] " Auger Eric
2017-07-06 21:16 ` Auger Eric
2017-07-06 23:23 ` [Qemu-arm] " Kalra, Ashish
2017-07-06 23:23 ` [Qemu-devel] [Qemu-arm] " Kalra, Ashish
2017-07-06 23:29 ` Michael S. Tsirkin [this message]
2017-07-06 23:29 ` Michael S. Tsirkin
2017-07-06 23:33 ` [Qemu-arm] [Qemu-devel] " Tian, Kevin
2017-07-06 23:33 ` [Qemu-devel] [Qemu-arm] " Tian, Kevin
2017-07-07 15:14 ` [Qemu-arm] [Qemu-devel] " Jean-Philippe Brucker
2017-07-07 15:14 ` [Qemu-devel] [Qemu-arm] " Jean-Philippe Brucker
2017-07-07 22:11 ` [Qemu-arm] [Qemu-devel] " Kalra, Ashish
2017-07-07 22:11 ` [Qemu-devel] [Qemu-arm] " Kalra, Ashish
2017-07-11 11:31 ` [Qemu-arm] [Qemu-devel] " Jean-Philippe Brucker
2017-07-11 11:31 ` [Qemu-devel] [Qemu-arm] " Jean-Philippe Brucker
2017-07-14 6:58 ` [Qemu-arm] [Qemu-devel] " Tian, Kevin
2017-07-14 6:58 ` [Qemu-devel] [Qemu-arm] " Tian, Kevin
2017-07-07 6:25 ` [Qemu-arm] [Qemu-devel] " Bharat Bhushan
2017-07-07 6:25 ` Bharat Bhushan
2017-07-07 7:25 ` [Qemu-arm] " Auger Eric
2017-07-07 7:25 ` Auger Eric
2017-07-07 11:36 ` [Qemu-arm] " Bharat Bhushan
2017-07-07 11:36 ` Bharat Bhushan
2017-07-07 15:19 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-07 15:19 ` Jean-Philippe Brucker
2017-07-11 5:54 ` [Qemu-arm] " Bharat Bhushan
2017-07-11 5:54 ` Bharat Bhushan
2017-07-11 12:51 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-11 12:51 ` Jean-Philippe Brucker
2017-07-12 3:50 ` [Qemu-arm] " Bharat Bhushan
2017-07-12 3:50 ` Bharat Bhushan
2017-07-12 10:18 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-12 10:18 ` Jean-Philippe Brucker
2017-07-12 10:27 ` [Qemu-arm] " Bharat Bhushan
2017-07-12 10:27 ` Bharat Bhushan
2017-07-12 10:58 ` Jean-Philippe Brucker
2017-07-12 11:12 ` [Qemu-arm] " Bharat Bhushan
2017-07-12 11:12 ` Bharat Bhushan
2017-07-06 21:11 ` [Qemu-arm] " Auger Eric
2017-07-06 21:11 ` Auger Eric
2017-07-07 7:31 ` [Qemu-arm] " Auger Eric
2017-07-07 7:31 ` Auger Eric
2017-07-07 15:20 ` [Qemu-arm] " Jean-Philippe Brucker
2017-07-07 15:20 ` Jean-Philippe Brucker
2017-06-09 12:15 ` [Qemu-arm] " Auger Eric
2017-06-09 12:15 ` [Qemu-devel] " Auger Eric
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