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| author | Peter Maydell <peter.maydell@linaro.org> | 2024-04-09 09:51:07 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2024-04-09 09:51:07 +0100 |
| commit | bc0cd4ae881dff47e81581a8fea93a50b1d1dbe7 (patch) | |
| tree | 39863f95cf5ef3daa9e34332d75efc47ff2f2423 /docs/system | |
| parent | 98cd02f39321a8669691fdf62940ac15be89f4f2 (diff) | |
| parent | e1999904a960c33b68fedf26dfb7b8e00abab8f2 (diff) | |
| download | qemu-bc0cd4ae881dff47e81581a8fea93a50b1d1dbe7.zip qemu-bc0cd4ae881dff47e81581a8fea93a50b1d1dbe7.tar.gz qemu-bc0cd4ae881dff47e81581a8fea93a50b1d1dbe7.tar.bz2 | |
Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging
virtio,pc,pci: bugfixes
Tiny fixes: important but mostly obvious ones. Revert VDPA network sim
for this release as there are questions around it's maintainatiblity.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu:
qdev-monitor: fix error message in find_device_state()
vhost-user-blk: simplify and fix vhost_user_blk_handle_config_change
vdpa-dev: Fix the issue of device status not updating when configuration interruption is triggered
hw/virtio: Fix packed virtqueue flush used_idx
virtio-snd: rewrite invalid tx/rx message handling
virtio-snd: Enhance error handling for invalid transfers
Revert "hw/virtio: Add support for VDPA network simulation devices"
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'docs/system')
| -rw-r--r-- | docs/system/device-emulation.rst | 1 | ||||
| -rw-r--r-- | docs/system/devices/vdpa-net.rst | 121 |
2 files changed, 0 insertions, 122 deletions
diff --git a/docs/system/device-emulation.rst b/docs/system/device-emulation.rst index e4a27f5..f197774 100644 --- a/docs/system/device-emulation.rst +++ b/docs/system/device-emulation.rst @@ -99,4 +99,3 @@ Emulated Devices devices/canokey.rst devices/usb-u2f.rst devices/igb.rst - devices/vdpa-net.rst diff --git a/docs/system/devices/vdpa-net.rst b/docs/system/devices/vdpa-net.rst deleted file mode 100644 index 323d8c9..0000000 --- a/docs/system/devices/vdpa-net.rst +++ /dev/null @@ -1,121 +0,0 @@ -vdpa net -============ - -This document explains the setup and usage of the vdpa network device. -The vdpa network device is a paravirtualized vdpa emulate device. - -Description ------------ - -VDPA net devices support dirty page bitmap mark and vring state saving and recovery. - -Users can use this VDPA device for live migration simulation testing in a nested virtualization environment. - -Registers layout ----------------- - -The vdpa device add live migrate registers layout as follow:: - - Offset Register Name Bitwidth Associated vq - 0x0 LM_LOGGING_CTRL 4bits - 0x10 LM_BASE_ADDR_LOW 32bits - 0x14 LM_BASE_ADDR_HIGH 32bits - 0x18 LM_END_ADDR_LOW 32bits - 0x1c LM_END_ADDR_HIGH 32bits - 0x20 LM_RING_STATE_OFFSET 32bits vq0 - 0x24 LM_RING_STATE_OFFSET 32bits vq1 - 0x28 LM_RING_STATE_OFFSET 32bits vq2 - ...... - 0x20+1023*4 LM_RING_STATE_OFFSET 32bits vq1023 - -These registers are extended at the end of the notify bar space. - -Architecture diagram --------------------- -:: - - |------------------------------------------------------------------------| - | guest-L1-user-space | - | | - | |----------------------------------------| - | | [virtio-net driver] | - | | ^ guest-L2-src(iommu=on) | - | |--------------|-------------------------| - | | | qemu-L2-src(viommu) | - | [dpdk-vdpa]<->[vhost socket]<-+->[vhost-user backend(iommu=on)] | - -------------------------------------------------------------------------- - -------------------------------------------------------------------------- - | ^ guest-L1-kernel-space | - | | | - | [VFIO] | - | ^ | - | | guest-L1-src(iommu=on) | - --------|----------------------------------------------------------------- - --------|----------------------------------------------------------------- - | [vdpa net device(iommu=on)] [manager nic device] | - | | | | - | | | | - | [tap device] qemu-L1-src(viommu) | | - ------------------------------------------------+------------------------- - | - | - --------------------- | - | kernel net bridge |<----- - | virbr0 |<---------------------------------- - --------------------- | - | - | - -------------------------------------------------------------------------- | - | guest-L1-user-space | | - | | | - | |----------------------------------------| | - | | [virtio-net driver] | | - | | ^ guest-L2-dst(iommu=on) | | - | |--------------|-------------------------| | - | | | qemu-L2-dst(viommu) | | - | [dpdk-vdpa]<->[vhost socket]<-+->[vhost-user backend(iommu=on)] | | - -------------------------------------------------------------------------- | - -------------------------------------------------------------------------- | - | ^ guest-L1-kernel-space | | - | | | | - | [VFIO] | | - | ^ | | - | | guest-L1-dst(iommu=on) | | - --------|----------------------------------------------------------------- | - --------|----------------------------------------------------------------- | - | [vdpa net device(iommu=on)] [manager nic device]----------------+---- - | | | - | | | - | [tap device] qemu-L1-dst(viommu) | - -------------------------------------------------------------------------- - - -Device properties ------------------ - -The Virtio vdpa device can be configured with the following properties: - - * ``vdpa=on`` open vdpa device emulated. - -Usages --------- -This patch add virtio sriov support and vdpa live migrate support. -You can open vdpa by set xml file as follow:: - - <qemu:commandline xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> - <qemu:arg value='-device'/> - <qemu:arg value='intel-iommu,intremap=on,device-iotlb=on,aw-bits=48'/> - <qemu:arg value='-netdev'/> - <qemu:arg value='tap,id=hostnet1,script=no,downscript=no,vhost=off'/> - <qemu:arg value='-device'/> - <qemu:arg value='virtio-net-pci,netdev=hostnet1,id=net1,mac=56:4a:b7:4f:4d:a9,bus=pci.6,addr=0x0,iommu_platform=on,ats=on,vdpa=on'/> - </qemu:commandline> - -Limitations ------------ -1. Dependent on tap device with param ``vhost=off``. -2. Nested virtualization environment only supports ``q35`` machines. -3. Current only support split vring live migrate. - - - |