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[PATCH v3 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM
From: |
Eric Auger |
Subject: |
[PATCH v3 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM |
Date: |
Thu, 11 Jun 2020 17:12:04 +0200 |
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-v3
History:
v2 -> v3:
- Introduce VIRT_MSI_CTRL_NONE in VirtMSIControllerType
- do not fill the remainder of the probe buffer
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 | 7 ++
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 | 111 +++++++++++++++++++++++++++++--
hw/virtio/trace-events | 1 +
10 files changed, 237 insertions(+), 4 deletions(-)
--
2.20.1
- [PATCH v3 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM,
Eric Auger <=
[PATCH v3 2/5] virtio-iommu: Implement RESV_MEM probe request, Eric Auger, 2020/06/11
[PATCH v3 3/5] virtio-iommu: Handle reserved regions in the translation process, Eric Auger, 2020/06/11