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From: Auger Eric <eric.auger@redhat.com>
To: Jean-Philippe Brucker <jean-philippe@linaro.org>,
	rjw@rjwysocki.net, lenb@kernel.org, joro@8bytes.org,
	mst@redhat.com
Cc: 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 11:58:49 +0100
Message-ID: <e7291605-88ca-6e55-11ec-574b2f94cefa@redhat.com> (raw)
In-Reply-To: <20210316191652.3401335-1-jean-philippe@linaro.org>

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?

Thanks

Eric
> 
> Jean-Philippe Brucker (3):
>   ACPICA: iASL: Add definitions for the VIOT table
>   ACPI: Add driver for the VIOT table
>   iommu/virtio: Enable x86 support
> 
>  drivers/acpi/Kconfig         |   3 +
>  drivers/iommu/Kconfig        |   4 +-
>  drivers/acpi/Makefile        |   2 +
>  include/acpi/actbl3.h        |  67 ++++++
>  include/linux/acpi_viot.h    |  26 +++
>  drivers/acpi/bus.c           |   2 +
>  drivers/acpi/scan.c          |   6 +
>  drivers/acpi/viot.c          | 406 +++++++++++++++++++++++++++++++++++
>  drivers/iommu/virtio-iommu.c |   3 +
>  MAINTAINERS                  |   8 +
>  10 files changed, 526 insertions(+), 1 deletion(-)
>  create mode 100644 include/linux/acpi_viot.h
>  create mode 100644 drivers/acpi/viot.c
> 


  parent 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 ` Auger Eric [this message]
2021-03-19 11:16   ` [PATCH 0/3] Add support for ACPI VIOT Jean-Philippe Brucker

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