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* [PATCH v2 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM
@ 2020-05-08 17:30 Eric Auger
  2020-05-08 17:30 ` [PATCH v2 1/5] qdev: Introduce DEFINE_PROP_RESERVED_REGION Eric Auger
                   ` (4 more replies)
  0 siblings, 5 replies; 15+ messages in thread
From: Eric Auger @ 2020-05-08 17:30 UTC (permalink / raw)
  To: eric.auger.pro, eric.auger, qemu-devel, qemu-arm, peter.maydell,
	mst, jean-philippe, bbhushan2, peterx, armbru, pbonzini

By default the virtio-iommu translates MSI transactions. This
behavior is inherited from ARM SMMU. However the virt machine
code knows where the MSI doorbells are, so we can easily
declare those regions as VIRTIO_IOMMU_RESV_MEM_T_MSI. With that
setting the guest iommu subsystem will not need to map MSIs.
This setup will simplify the VFIO integration.

In this series, the ITS or GICV2M doorbells are declared as
HW MSI regions to be bypassed by the VIRTIO-IOMMU.

This also paves the way to the x86 integration where the MSI
region, [0xFEE00000,0xFEEFFFFF], will be exposed by the q35
machine.  However this will be handled in a separate series
when not-DT support gets resolved.

Best Regards

Eric

This series can be found at:
https://github.com/eauger/qemu/tree/v5.0.0-virtio-iommu-msi-bypass-v2

History:

v1 -> v2:
- check which MSI controller is in use and advertise the
  corresponding MSI doorbell
- managed for both ITS and GICv2M
- various fixes spotted by Peter and Jean-Philippe, see
  individual logs

v1: Most of those patches were respinned from
  [PATCH for-5.0 v11 00/20] VIRTIO-IOMMU device
  except the last one which is new

Eric Auger (5):
  qdev: Introduce DEFINE_PROP_RESERVED_REGION
  virtio-iommu: Implement RESV_MEM probe request
  virtio-iommu: Handle reserved regions in the translation process
  virtio-iommu-pci: Add array of Interval properties
  hw/arm/virt: Let the virtio-iommu bypass MSIs

 include/exec/memory.h            |   6 ++
 include/hw/arm/virt.h            |   6 ++
 include/hw/qdev-properties.h     |   3 +
 include/hw/virtio/virtio-iommu.h |   2 +
 include/qemu/typedefs.h          |   1 +
 hw/arm/virt.c                    |  18 +++++
 hw/core/qdev-properties.c        |  89 ++++++++++++++++++++++++
 hw/virtio/virtio-iommu-pci.c     |   3 +
 hw/virtio/virtio-iommu.c         | 114 +++++++++++++++++++++++++++++--
 hw/virtio/trace-events           |   1 +
 10 files changed, 239 insertions(+), 4 deletions(-)

-- 
2.20.1



^ permalink raw reply	[flat|nested] 15+ messages in thread

end of thread, other threads:[~2020-05-22 14:44 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-08 17:30 [PATCH v2 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM Eric Auger
2020-05-08 17:30 ` [PATCH v2 1/5] qdev: Introduce DEFINE_PROP_RESERVED_REGION Eric Auger
2020-05-08 17:30 ` [PATCH v2 2/5] virtio-iommu: Implement RESV_MEM probe request Eric Auger
2020-05-11  6:38   ` [EXT] " Bharat Bhushan
2020-05-11  6:55     ` Auger Eric
2020-05-11  8:42       ` Bharat Bhushan
2020-05-11  8:49         ` Auger Eric
2020-05-12  3:03           ` Bharat Bhushan
2020-05-12  3:08             ` Auger Eric
2020-05-12  3:11               ` Bharat Bhushan
2020-05-08 17:30 ` [PATCH v2 3/5] virtio-iommu: Handle reserved regions in the translation process Eric Auger
2020-05-11 21:11   ` Peter Xu
2020-05-08 17:30 ` [PATCH v2 4/5] virtio-iommu-pci: Add array of Interval properties Eric Auger
2020-05-08 17:30 ` [PATCH v2 5/5] hw/arm/virt: Let the virtio-iommu bypass MSIs Eric Auger
2020-05-22 14:43   ` Jean-Philippe Brucker

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