doc: change the parameter of virtio-net

Remove device name requirement for “tap” and "vmnet", change the
parameter format like:
"-s 4,virtio-net,tap/vmnet=dev_name".
change mac_seed to virtio-net sub-parameter
As a parameter of acrn-dm,the mac_seed is only used for virtio-net.
So this patch change it to the sub-parameter of virtio-net.
The final format is:
-s 4,virtio-net,tap/vmnet=dev_name,mac_seed=XXXX

Tracked-On: #6690
Signed-off-by: Chenli Wei chenli.wei@linux.intel.com

doc/developer-guides/hld/hld-devicemodel.rst

@@ -110,7 +110,7 @@ Here's an example showing how to run a VM with:
      -s 1:0,lpc -l com1,stdio \
      -s 5,virtio-console,@pty:pty_port \
      -s 3,virtio-blk,/home/acrn/UserVM.img \
-     -s 4,virtio-net,tap_LaaG \
+     -s 4,virtio-net,tap=LaaG \
      --acpidev_pt MSFT0101,00 \
      --intr_monitor 10000,10,1,100 \
      -B "root=/dev/vda2 rw rootwait maxcpus=3 nohpet console=hvc0 \
@@ -773,7 +773,7 @@ example:
      -s 1:0,lpc -l com1,stdio \
      -s 5,virtio-console,@pty:pty_port \
      -s 3,virtio-blk,/home/acrn/UserVM.img \
-     -s 4,virtio-net,tap_LaaG \
+     -s 4,virtio-net,tap=LaaG \
      -B "root=/dev/vda2 rw rootwait maxcpus=3 nohpet console=hvc0 \
      console=ttyS0 no_timer_check ignore_loglevel log_buf_len=16M \
      consoleblank=0 tsc=reliable \

doc/developer-guides/hld/hostbridge-virt-hld.rst

@@ -21,11 +21,10 @@ command line input. Using this command line, as an example::
         -s 5,virtio-console,@stdio:stdio_port \
         -s 6,virtio-hyper_dmabuf \
         -s 3,virtio-blk,/home/acrn/UserVM.img \
-        -s 4,virtio-net,tap0 \
+        -s 4,virtio-net,tap=tap0,mac_seed=$mac_seed \
         -s 7,virtio-rnd \
         --ovmf /usr/share/acrn/bios/OVMF.fd \
         $logger_setting \
-        --mac_seed $mac_seed \
         $vm_name
 
 the bus hierarchy would be:

doc/developer-guides/hld/hv-dev-passthrough.rst

@@ -436,7 +436,7 @@ passthrough and enables PTM on it:
 
    acrn-dm -m $mem_size -s 0:0,hostbridge \
       -s 3,virtio-blk,user-vm-test.img \
-      -s 4,virtio-net,tap0 \
+      -s 4,virtio-net,tap=tap0 \
       -s 5,virtio-console,@stdio:stdio_port \
       -s 6,passthru,a9/00/0,enable_ptm \
       --ovmf /usr/share/acrn/bios/OVMF.fd
@@ -506,7 +506,7 @@ If supported, follow these steps to enable PTM in the post-launched VM:
 
       $ acrn-dm -m $mem_size -s 0:0,hostbridge \
           -s 3,virtio-blk,user-vm-test.img \
-          -s 4,virtio-net,tap0 \
+          -s 4,virtio-net,tap=tap0 \
           -s 5,virtio-console,@stdio:stdio_port \
           -s 6,passthru,a9/00/0,enable_ptm \
           --ovmf /usr/share/acrn/bios/OVMF.fd \

doc/developer-guides/hld/virtio-net.rst

@@ -484,7 +484,7 @@ optional):
 
 .. code-block:: none
 
-    -s 4,virtio-net,<tap_name>,[mac=<XX:XX:XX:XX:XX:XX>]
+    -s 4,virtio-net,tap=<name>,[mac=<XX:XX:XX:XX:XX:XX>]
 
 When the User VM is launched, run ``ifconfig`` to check the network. enp0s4r
 is the virtual NIC created by acrn-dm:
@@ -525,15 +525,14 @@ Create a MacVTap interface in the Service VM as shown here:
    sudo ip link add link eth0 name macvtap0 type macvtap
 
 where ``eth0`` is the name of the physical network interface, and
-``macvtap0`` is the name of the MacVTap interface being created. (Make
-sure the MacVTap interface name includes the keyword ``tap``.)
+``macvtap0`` is the name of the MacVTap interface being created.
 
 Once the MacVTap interface is created, the User VM can be launched by adding
 a PCI slot to the Device Model acrn-dm as shown below.
 
 .. code-block:: none
 
-   -s 4,virtio-net,<macvtap_name>,[mac=<XX:XX:XX:XX:XX:XX>]
+   -s 4,virtio-net,tap=macvtap0,[mac=<XX:XX:XX:XX:XX:XX>]
 
 Performance Estimation
 ======================

doc/tutorials/acrn_on_qemu.rst

@@ -273,7 +273,7 @@ Bring Up User VM (L2 Guest)
       mem_size=1024M
       acrn-dm -m $mem_size -s 0:0,hostbridge \
       -s 3,virtio-blk,~/UserVM.img \
-      -s 4,virtio-net,tap0 \
+      -s 4,virtio-net,tap=tap0 \
       --cpu_affinity 1 \
       -s 5,virtio-console,@stdio:stdio_port \
       --ovmf ~/OVMF.fd \

doc/tutorials/enable_ivshmem.rst

@@ -139,7 +139,7 @@ Linux-based post-launched VMs (VM1 and VM2).
          -s 5,virtio-console,@stdio:stdio_port \
          -s 6,virtio-hyper_dmabuf \
          -s 3,virtio-blk,/home/acrn/UserVM1.img \
-         -s 4,virtio-net,tap0 \
+         -s 4,virtio-net,tap=tap0 \
          -s 6,ivshmem,dm:/test,2 \
          -s 7,virtio-rnd \
          --ovmf /usr/share/acrn/bios/OVMF.fd \
@@ -153,7 +153,7 @@ Linux-based post-launched VMs (VM1 and VM2).
 
         acrn-dm -m $mem_size -s 0:0,hostbridge \
          -s 3,virtio-blk,/home/acrn/UserVM2.img \
-         -s 4,virtio-net,tap0 \
+         -s 4,virtio-net,tap=tap0 \
          -s 5,ivshmem,dm:/test,2 \
          --ovmf /usr/share/acrn/bios/OVMF.fd \
          $vm_name
@@ -220,7 +220,7 @@ Linux-based VMs (VM0 is a pre-launched VM and VM2 is a post-launched VM).
 
         acrn-dm -m $mem_size -s 0:0,hostbridge \
          -s 3,virtio-blk,/home/acrn/UserVM2.img \
-         -s 4,virtio-net,tap0 \
+         -s 4,virtio-net,tap=tap0 \
          -s 5,ivshmem,hv:/shm_region_0,2 \
          --ovmf /usr/share/acrn/bios/OVMF.fd \
          $vm_name

doc/tutorials/launch_uos.sh

@@ -43,7 +43,7 @@ vm_name=vm$1
 mac_seed=${mac:9:8}-${vm_name}
 
 # create a unique tap device for each VM
-tap=tap_$6
+tap=$6
 tap_exist=$(ip a | grep "$tap" | awk '{print $1}')
 if [ "$tap_exist"x != "x" ]; then
   echo "tap device existed, reuse $tap"
@@ -135,11 +135,10 @@ acrn-dm -m $mem_size -c $2 -s 0:0,hostbridge -s 1:0,lpc -l com1,stdio \
   -s 6,virtio-hyper_dmabuf \
   -s 8,wdt-i6300esb \
   -s 3,virtio-blk,/data/$5/$5.img \
-  -s 4,virtio-net,$tap \
+  -s 4,virtio-net,tap=$tap,mac_seed=$mac_seed \
   -s 7,xhci,1-1:1-2:1-3:2-1:2-2:2-3:cap=apl \
   -s 9,passthru,0/15/1 \
   $boot_cse_option \
-  --mac_seed $mac_seed \
   $intr_storm_monitor \
   $boot_ipu_option      \
   -B "root=/dev/vda2 rw rootwait maxcpus=$2 nohpet console=hvc0 \
@@ -162,7 +161,7 @@ vm_name=vm$1
 mac_seed=${mac:9:8}-${vm_name}
 
 # create a unique tap device for each VM
-tap=tap_$6
+tap=$6
 tap_exist=$(ip a | grep "$tap" | awk '{print $1}')
 if [ "$tap_exist"x != "x" ]; then
   echo "tap device existed, reuse $tap"
@@ -313,7 +312,7 @@ ACRN project
 intr_storm_monitor="--intr_monitor 10000,10,1,100"
 
  acrn-dm -m $mem_size -c $2 -s 0:0,hostbridge -s 1:0,lpc -l com1,stdio $npk_virt\
-   -s 9,virtio-net,$tap \
+   -s 9,virtio-net,tap=$tap,mac_seed=$mac_seed  \
    -s 3,virtio-blk,/data/$5/$5.img \
    -s 7,xhci,1-1:1-2:1-3:2-1:2-2:2-3:cap=apl \
    -s 8,passthru,0/15/1 \
@@ -322,7 +321,6 @@ intr_storm_monitor="--intr_monitor 10000,10,1,100"
    -s 11,wdt-i6300esb \
    $boot_audio_option \
    $boot_cse_option \
-   --mac_seed $mac_seed \
    -s 27,passthru,0/1b/0 \
    -s 24,passthru,0/18/0 \
    -s 18,passthru,3/0/0,keep_gsi \

doc/tutorials/using_windows_as_user_vm.rst

@@ -105,7 +105,7 @@ Prepare the Script to Create an Image
    mem_size=4096M
    acrn-dm -m $mem_size -s 0:0,hostbridge -s 1:0,lpc -l com1,stdio \
      -s 2,passthru,0/2/0 \
-     -s 8,virtio-net,tap0 \
+     -s 8,virtio-net,tap=tap0 \
      -s 4,virtio-blk,/home/acrn/work/win10-ltsc.img
      -s 5,ahci,cd:/home/acrn/work/Windows10.iso \
      -s 6,ahci,cd:/home/acrn/work/winvirtio.iso \
@@ -266,7 +266,7 @@ Explanation for acrn-dm Popular Command Lines
   This is GVT-d to passthrough the VGA controller to Windows.
   You may need to change 0/2/0 to match the bdf of the VGA controller on your platform.
 
-* ``-s 8,virtio-net,tap0``:
+* ``-s 8,virtio-net,tap=tap0``:
   This is for the network virtualization.
 
 * ``-s 3,virtio-input,/dev/input/event4``:

doc/user-guides/acrn-dm-parameters.rst

@@ -93,19 +93,6 @@ Here are descriptions for each of these ``acrn-dm`` command line parameters:
 
 ----
 
-``--mac_seed <seed_string>``
-   Set a platform-unique string as a seed to generate the mac address.  Each
-   VM should have a different "seed_string".  The "seed_string" can be
-   generated by the following method where $(vm_name) contains the name of the
-   VM you are going to launch.
-
-   .. code-block::
-
-      mac=$(cat /sys/class/net/e*/address)
-      seed_string=${mac:9:8}-${vm_name}
-
-----
-
 ``-r``, ``--ramdisk <ramdisk_image_path>``
    Set the ramdisk (full path) for the User VM. The maximum length is 1023.
    The supported ramdisk format depends on your User VM kernel configuration.
@@ -467,10 +454,23 @@ arguments used for configuration.  Here is a table describing these emulated dev
 
    * - ``virtio-net``
      - Virtio network type device, parameter should be appended with the format:
-       ``virtio-net,<device_name>,[vhost],[mac=<XX:XX:XX:XX:XX:XX>]``.
-       The ``mac`` address is optional, ``device_name`` is the name of the TAP (or MacVTap) device.
-       It must include the keyword ``tap``.
+       ``virtio-net,<device_type>=<name>,[vhost],[mac=<XX:XX:XX:XX:XX:XX>],[mac_seed=<seed_string>]``.
+       The ``mac`` address is optional, ``name`` is the name of the TAP (or MacVTap) device.
        ``vhost`` specifies vhost backend, otherwise the VBSU backend is used.
+       ``mac_seed=<seed_string>``
+       Set a platform-unique string as a seed to generate the mac address.  Each
+       VM should have a different "seed_string".  The "seed_string" can be
+       generated by the following method where $(vm_name) contains the name of the
+       VM you are going to launch.
+
+       .. note::
+          When both ``mac`` and ``mac_seed`` are set, the latter is ignored
+          and the MAC address is set to the ``mac`` value. ``mac_seed`` will
+          only be used when ``mac`` is not set.
+.. code-block::
+
+       mac=$(cat /sys/class/net/e*/address)
+       seed_string=${mac:9:8}-${vm_name}
 
    * - ``passthru``
      - Indicates a passthrough device. Use the parameter with the format