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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: 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, eric.auger@redhat.com,
	sebastien.boeuf@intel.com, robin.murphy@arm.com,
	kevin.tian@intel.com, lorenzo.pieralisi@arm.com,
	jean-philippe@linaro.org
Subject: [PATCH 0/3] Add support for ACPI VIOT
Date: Tue, 16 Mar 2021 20:16:50 +0100
Message-ID: <20210316191652.3401335-1-jean-philippe@linaro.org> (raw)

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/

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

-- 
2.30.2


             reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 19:16 Jean-Philippe Brucker [this message]
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

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