[kvm-ppc-devel] virtio net driver on ppc440

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Oops, I hit "send" before I finished my note.

The problem is that my guest only seems to show the loopback device:
root:~> ifconfig
lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

How can I get eth working in my guest?  Thanks for your help ...

/**************************************************
 * Edward D. Doan
 * Power Architecture Application Engineer
 * Systems & Technology Group
 * IBM Corporation
 * 512.838.4936
 * ed...@us... 
 *************************************************/

__________________

Here's what I have for .config:

[edoan@ps3ydl kvmppc.hg]$ grep VIRTIO .config
CONFIG_VIRTIO_BLK=y
CONFIG_VIRTIO_NET=y
CONFIG_VIRTIO=y
CONFIG_VIRTIO_RING=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_BALLOON=y

I created /dev/net/tap via mknod /dev/net/tap c 10 200.  I also copied 
brctl into /sbin/.  I launch the guest on my ppc440 Sequoia board:

bash-3.00# ./qemu-system-ppcemb -nographic -M bamboo -kernel uImage 
-append "console=ttyS0,115200" -L . -net 
nic,model=virtio,macaddr=00:00:00:00:00:AA -net tap

test for existing bridge br0
port no mac addr                is local?       ageing timer
  1     00:10:ec:80:ee:84       yes                0.00
ok - bridge br0 already available
bamboo_init: START
<snip>

I don't have lspci in my guest.  Output of dmesg:

root:~> dmesg
Using Bamboo machine description
Linux version 2.6.25-rc9 (jerone@thinkpadL) (gcc version 3.4.5) #31 Mon 
Apr 21 16:15:03 CDT 2008
Found legacy serial port 0 for /plb/opb/serial@ef600300
  mem=ef600300, taddr=ef600300, irq=0, clk=11059200, speed=115200
Found legacy serial port 1 for /plb/opb/serial@ef600400
  mem=ef600400, taddr=ef600400, irq=0, clk=11059200, speed=0
console [udbg0] enabled
Entering add_active_range(0, 0, 36864) 0 entries of 256 used
Top of RAM: 0x9000000, Total RAM: 0x9000000
Memory hole size: 0MB
Zone PFN ranges:
  DMA             0 ->    36864
  Normal      36864 ->    36864
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0:        0 ->    36864
On node 0 totalpages: 36864
  DMA zone: 288 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 36576 pages, LIFO batch:7
  Normal zone: 0 pages used for memmap
  Movable zone: 0 pages used for memmap
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 36576
Kernel command line: console=ttyS0,115200
UIC0 (32 IRQ sources) at DCR 0xc0
PID hash table entries: 1024 (order: 10, 4096 bytes)
time_init: decrementer frequency = 666.666660 MHz
time_init: processor frequency   = 666.666660 MHz
clocksource: timebase mult[600000] shift[22] registered
clockevent: decrementer mult[aaaa] shift[16] cpu[0]
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 141824k/147456k available (3872k kernel code, 5492k reserved, 100k 
data, 125k bss, 1500k init)
SLUB: Genslabs=10, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1
Calibrating delay loop... 2490.36 BogoMIPS (lpj=4980736)
Mount-cache hash table entries: 512
net_namespace: 152 bytes
NET: Registered protocol family 16
PCI host bridge /plb/pci@ec000000 (primary) ranges:
 MEM 0x00000000a0000000..0x00000000bfffffff -> 0x00000000a0000000 
  IO 0x00000000e8000000..0x00000000e800ffff -> 0x0000000000000000
4xx PCI DMA offset set to 0x00000000
PCI: Probing PCI hardware
PCI: Hiding 4xx host bridge resources 0000:00:00.0
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250.0: ttyS0 at MMIO 0xef600300 (irq = 16) is a 16450
console handover: boot [udbg0] -> real [ttyS0]
ef600300.serial: ttyS0 at MMIO 0xef600300 (irq = 16) is a 16450
brd: module loaded
PPC 4xx OCP EMAC driver, version 3.54
ZMII /plb/opb/emac-zmii@ef600d00 initialized
PCI: Enabling device 0000:00:01.0 (0000 -> 0001)
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
Freeing unused kernel memory: 1500k init

/**************************************************
 * Edward D. Doan
 * Power Architecture Application Engineer
 * Systems & Technology Group
 * IBM Corporation
 * 512.838.4936
 * ed...@us... 
 *************************************************/

From:
Anthony Liguori <an...@co...>
To:
jy...@li...
Cc:
kvm-devel <kvm...@li...>, Edward D 
Doan/Austin/IBM@IBMUS
Date:
04/22/08 08:35 AM
Subject:
Re: [kvm-devel] What kernel options do I need to properly enable virtio 
net driver

Jerone Young wrote:
> What I am asking is do I have all the proper options in my kernel config
> set to use it?
> 

Yes.  You just need CONFIG_VIRTIO_NET and CONFIG_VIRTIO_PCI.  The 
remaining options will be automatically selected.

Regards,

Anthony Liguori

> On Mon, 2008-04-21 at 17:13 -0500, Anthony Liguori wrote:
> 
>> Jerone Young wrote:
>> 
>>> virtio net device does not appear to show itself in the guest. I'm
>>> curious of what options I may be missing. Here is my config
>>> 
>> You'll have to be more specific about what "does not appear to show 
>> itself" means.  What's the output of lspci?
>>
>> Regards,
>>
>> Anthony Liguori
>>
>> 
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