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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: Auger Eric <eric.auger@redhat.com>
Cc: rjw@rjwysocki.net, lenb@kernel.org, joro@8bytes.org,
	mst@redhat.com, will@kernel.org, linux-acpi@vger.kernel.org,
	iommu@lists.linux-foundation.org,
	virtualization@lists.linux-foundation.org,
	sebastien.boeuf@intel.com, robin.murphy@arm.com,
	kevin.tian@intel.com, lorenzo.pieralisi@arm.com
Subject: Re: [PATCH 0/3] Add support for ACPI VIOT
Date: Fri, 19 Mar 2021 12:16:57 +0100
Message-ID: <YFSIKeihQAc8KPmG@myrica> (raw)
In-Reply-To: <e7291605-88ca-6e55-11ec-574b2f94cefa@redhat.com>

Hi Eric,

On Fri, Mar 19, 2021 at 11:58:49AM +0100, Auger Eric wrote:
> Hi Jean,
> 
> On 3/16/21 8:16 PM, Jean-Philippe Brucker wrote:
> > Add a driver for the ACPI VIOT table, which enables virtio-iommu on
> > non-devicetree platforms, including x86. This series depends on the
> > ACPICA changes of patch 1, which will be included in next release [1]
> > and pulled into Linux.
> > 
> > The Virtual I/O Translation table (VIOT) describes the topology of
> > para-virtual I/O translation devices and the endpoints they manage.
> > It was recently approved for inclusion into the ACPI standard [2].
> > A provisional version of the specification can be found at [3].
> > 
> > After discussing non-devicetree support for virtio-iommu at length
> > [4][5][6] we concluded that it should use this new ACPI table. And for
> > platforms that don't implement either devicetree or ACPI, a structure
> > that uses roughly the same format [6] can be built into the device.
> > 
> > [1] https://github.com/acpica/acpica/pull/666
> > [2] https://lore.kernel.org/linux-iommu/20210218233943.GH702808@redhat.com/
> > [3] https://jpbrucker.net/virtio-iommu/viot/viot-v9.pdf
> > [4] https://lore.kernel.org/linux-iommu/20191122105000.800410-1-jean-philippe@linaro.org/
> > [5] https://lore.kernel.org/linux-iommu/20200228172537.377327-1-jean-philippe@linaro.org/
> > [6] https://lore.kernel.org/linux-iommu/20200821131540.2801801-1-jean-philippe@linaro.org/
> 
> Do you have a qemu branch to share for us to start exercising different
> kinds of topology?

Yes: https://jpbrucker.net/git/qemu/log/?h=virtio-iommu/acpi
Thanks for the reviews, I'll rework this in a week or so

Jean


      reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 19:16 Jean-Philippe Brucker
2021-03-16 19:16 ` [PATCH 1/3] ACPICA: iASL: Add definitions for the VIOT table Jean-Philippe Brucker
2021-03-18 17:52   ` Auger Eric
2021-04-15 14:36     ` Jean-Philippe Brucker
2021-03-16 19:16 ` [PATCH 2/3] ACPI: Add driver " Jean-Philippe Brucker
2021-03-18 19:36   ` Robin Murphy
2021-04-15 14:31     ` Jean-Philippe Brucker
2021-03-19 10:44   ` Auger Eric
2021-04-15 14:46     ` Jean-Philippe Brucker
2021-03-16 19:16 ` [PATCH 3/3] iommu/virtio: Enable x86 support Jean-Philippe Brucker
2021-03-18 10:44   ` Joerg Roedel
2021-03-18 11:43   ` Robin Murphy
2021-04-15 15:14     ` Jean-Philippe Brucker
2021-03-18 18:28   ` Michael S. Tsirkin
2021-04-15 15:15     ` Jean-Philippe Brucker
2021-03-19 10:58 ` [PATCH 0/3] Add support for ACPI VIOT Auger Eric
2021-03-19 11:16   ` Jean-Philippe Brucker [this message]

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