[kvm-ppc-devel] virtio-net working on PowerPC KVM

[Hollis Blanchard <hollisb@us.ibm.com>]

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I'm pleased to report that we now have working network support in the
guest, via the virtio-net driver. In fact, we can use NFS for the
guest's root filesystem. :) Boot log attached.

The bad news is that it's very slow, but the good news is that it's nice
to be improving performance rather than debugging mysterious
crashes... ;)

With this milestone reached, in the near future I intend to start
sending patches to Avi and linuxppc-dev for review, hopefully for
inclusion in 2.6.26. However, I do want to see if we can improve the
performance a little bit first...

-- 
Hollis Blanchard
IBM Linux Technology Center

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bash-3.00# ./qemu-system-ppcemb -M bamboo -nographic -kernel ../../uImage.bamboo -L ../pc-bios/ -append "ip=dhcp nfsroot=9.XX.XX.XX:/netroot/ppc_4xx root=/dev/nfs rw debug" -net nic,model=virtio -net tap 
bamboo_init: START
Ram size passed is: 144 MB
Calling function ppc440_init
setup mmio
setup universal controller
trying to setup sdram controller
sdram_unmap_bcr: Unmap RAM area 0000000000000000 00400000
sdram_unmap_bcr: Unmap RAM area 0000000000000000 00400000
sdram_set_bcr: Map RAM area 0000000000000000 08000000
sdram_set_bcr: Map RAM area 0000000000000000 01000000
Initializing first serial port
ppc405_serial_init: offset 0000000000000300
Done calling ppc440_init
bamboo_init: load kernel
kernel is at guest address: 0x0
bamboo_init: load device tree file
device tree address is at guest address: 0x2b2100
bamboo_init: loading kvm registers
bamboo_init: DONE
Using Bamboo machine description
Linux version 2.6.25-rc3-hg1858cec8eb87-dirty (hollisb@basalt) (gcc version 3.4.2) #150 Wed Mar 19 12:51:20 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
setup_arch: bootmem
arch: exit
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: ip=dhcp nfsroot=9.XX.XX.XX:/netroot/ppc_4xx root=/dev/nfs rw debug
irq: Allocated host of type 2 @0xc03f3900
UIC0 (32 IRQ sources) at DCR 0xc0
irq: Default host set to @0xc03f3900
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: 143060k/147456k available (2632k kernel code, 4252k reserved, 100k data, 125k bss, 132k 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: 156 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
irq: irq_create_mapping(0xc03f3900, 0x1c)
irq: -> using host @c03f3900
irq: -> obtained virq 28
Time: timebase clocksource has been installed.
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
irq: irq_create_mapping(0xc03f3900, 0x0)
irq: -> using host @c03f3900
irq: -> obtained virq 16
irq: irq_create_mapping(0xc03f3900, 0x1)
irq: -> using host @c03f3900
irq: -> obtained virq 17
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]
irq: irq_create_mapping(0xc03f3900, 0x0)
irq: -> using host @c03f3900
irq: -> existing mapping on virq 16
ef600300.serial: ttyS0 at MMIO 0xef600300 (irq = 16) is a 16450
irq: irq_create_mapping(0xc03f3900, 0x1)
irq: -> using host @c03f3900
irq: -> existing mapping on virq 17
brd: module loaded
Intel(R) PRO/1000 Network Driver - version 7.3.20-k2
Copyright (c) 1999-2006 Intel Corporation.
pcnet32.c:v1.34 14.Aug.2007 tsbogend@alpha.franken.de
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
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.
Sending DHCP requests .., OK
IP-Config: Got DHCP answer from 255.255.255.255, my address is 9.XX.XX.XX
IP-Config: Complete:
     device=eth0, addr=9.XX.XX.XX, mask=255.255.255.0, gw=9.XX.XX.XX,
     host=9.XX.XX.XX, domain=austin.ibm.com, nis-domain=(none),
     bootserver=255.255.255.255, rootserver=9.XX.XX.XX, rootpath=
Looking up port of RPC 100003/2 on 9.XX.XX.XX
Looking up port of RPC 100005/1 on 9.XX.XX.XX
VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 132k init
modprobe: FATAL: Could not load /lib/modules/2.6.25-rc3-hg1858cec8eb87-dirty/modules.dep: No such file or directory

modprobe: FATAL: Could not load /lib/modules/2.6.25-rc3-hg1858cec8eb87-dirty/modules.dep: No such file or directory

INIT: version 2.85 booting
		Welcome to DENX Embedded Linux Environment
		Press 'I' to enter interactive startup.
Building the cache [  OK  ]
 storage network audio done[  OK  ]
modprobe: FATAL: Could not load /lib/modules/2.6.25-rc3-hg1858cec8eb87-dirty/modules.dep: No such file or directory

Cannot access the Hardware Clock via any known method.
Use the --debug option to see the details of our search for an access method.
Setting clock : Thu Jan  1 00:04:09 UTC 1970 [  OK  ]
Setting hostname 9.53.41.171:  [  OK  ]
Mounting local filesystems:  [  OK  ]
Enabling swap space:  [  OK  ]
INIT: Entering runlevel: 3
Entering non-interactive startup
Bringing up loopback interface:  [  OK  ]
Starting system logger: [  OK  ]
Starting kernel logger: [  OK  ]
Starting portmap: [  OK  ]
Mounting NFS filesystems:  [  OK  ]
Mounting other filesystems:  [  OK  ]
Starting xinetd: [  OK  ]
add bridge failed: Package not installed
interface eth1 does not exist!
SIOCGIFFLAGS: No such device
SIOCGIFFLAGS: No such device

DENX ELDK version 4.1 build 2007-01-19
Linux 2.6.25-rc3-hg1858cec8eb87-dirty on a ppc

9 login: 

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