Hi, On 6/29/20 9:03 AM, Eric Auger wrote: > 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-v7
A gentle reminder to make sure this series does not get forgotten before the freeze. Best Regards Eric > > History: > > v6 -> v7: > - fix the hint message > - put the assert again on probe request > > v5 -> v6: > - do not hardcode start/end addresses of doorbells > - check reserved region type on realize() > > v4 -> v5: > - Take into account some additional comments from Markus: > - reserved region type becomes an unsigned + some comment/desc > rewording > - assert if the type is not RESERVED or MSI > > v3 -> v4: > - collected Jean and markus's R-bs > - tool into account all Markus' comments in [1/5] (except removal of > goto) > - use ':' as delimitor instead of commas > - add example in 4/5 commit message as suggested by Markus > > 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 | 30 ++++++++ > hw/core/qdev-properties.c | 89 ++++++++++++++++++++++++ > hw/virtio/virtio-iommu-pci.c | 11 +++ > hw/virtio/virtio-iommu.c | 114 +++++++++++++++++++++++++++++-- > hw/virtio/trace-events | 1 + > 10 files changed, 260 insertions(+), 4 deletions(-) >
