Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, cleanups, fixes

more memslots support in libvhost-user
support PCIe Gen5/Gen6 link speeds in pcie
more traces in vdpa
network simulation devices support in vdpa
SMBIOS type 9 descriptor implementation
Bump max_cpus to 4096 vcpus in q35
aw-bits and granule options in VIRTIO-IOMMU
Support report NUMA nodes for device memory using GI in acpi
Beginning of shutdown event support in pvpanic

fixes, cleanups all over the place.

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: (68 commits)
  docs/specs/pvpanic: document shutdown event
  hw/cxl: Fix missing reserved data in CXL Device DVSEC
  hmat acpi: Fix out of bounds access due to missing use of indirection
  hmat acpi: Do not add Memory Proximity Domain Attributes Structure targetting non existent memory.
  qemu-options.hx: Document the virtio-iommu-pci aw-bits option
  hw/arm/virt: Set virtio-iommu aw-bits default value to 48
  hw/i386/q35: Set virtio-iommu aw-bits default value to 39
  virtio-iommu: Add an option to define the input range width
  virtio-iommu: Trace domain range limits as unsigned int
  qemu-options.hx: Document the virtio-iommu-pci granule option
  virtio-iommu: Change the default granule to the host page size
  virtio-iommu: Add a granule property
  hw/i386/acpi-build: Add support for SRAT Generic Initiator structures
  hw/acpi: Implement the SRAT GI affinity structure
  qom: new object to associate device to NUMA node
  hw/i386/pc: Inline pc_cmos_init() into pc_cmos_init_late() and remove it
  hw/i386/pc: Set "normal" boot device order in pc_basic_device_init()
  hw/i386/pc: Avoid one use of the current_machine global
  hw/i386/pc: Remove "rtc_state" link again
  Revert "hw/i386/pc: Confine system flash handling to pc_sysfw"
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

# Conflicts:
#	hw/core/machine.c

2 files changed, 122 insertions, 0 deletions

diff --git a/docs/system/device-emulation.rst b/docs/system/device-emulation.rst
index f19777411c..e4a27f53c8 100644
--- a/docs/system/device-emulation.rst
+++ b/docs/system/device-emulation.rst
@@ -99,3 +99,4 @@ 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
new file mode 100644
index 0000000000..323d8c926a
--- /dev/null
+++ b/docs/system/devices/vdpa-net.rst
@@ -0,0 +1,121 @@
+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.
+
+
+