2008/6/28 Andy Burns <fedora.lists@xxxxxxxxxxx>:
> to change plan, will either F8 or CentOS5.2 domU's support pci
> passthrough, on top of either F8 or CentOS5.2 dom0?
I've kept F8 as dom0 and now using CentOS5.2 as domU
I've added pciback.hide=(08.01.0) to grub.conf for dom0
but it seems that pciback options are not understood at boot time (due
to it being a module?)
I'm aware I may be able to handle preventing dom0 handling the device
better in the long term with /etc/modprobe.conf, but for now I'm
running a little script in dom0
rmmod saa7134
modprobe pciback
SLOT=0000:08:01.0
echo -n $SLOT > /sys/bus/pci/drivers/pciback/new_slot
echo -n $SLOT > /sys/bus/pci/drivers/pciback/bind
I've created a new domU using the centosplus kernel to get extra V4L
drivers with the following /etc/xen/ style config file
memory = 1024
name = "mythbe"
vif = [ 'mac=00:16:3E:76:E8:92, bridge=eth0' ]
disk = [ 'phy:/dev/vgr1/lvmythroot,xvda,w' ]
pci = ['08:01.0']
bootloader = "/usr/bin/pygrub"
vcpus = 1
on_reboot = 'restart'
on_crash = 'restart'
The domU starts OK, and the pci device is present
# lspci -v
00:00.0 Multimedia controller: Philips Semiconductors SAA7130 Video
Broadcast Decoder (rev 01)
Subsystem: Compro Technology, Inc. Videomate DVB-T200
Flags: bus master, medium devsel, latency 64, IRQ 17
Memory at febffc00 (32-bit, non-prefetchable) [size=1K]
Capabilities: [40] Power Management version 1
I assume it is normal that the bus/slot/function numbers are not the
same in domU as in dom0?
I can load the driver for the card in the domU
# lsmod | grep saa
saa7134 159017 0
video_buf 59717 1 saa7134
compat_ioctl32 41793 1 saa7134
ir_kbd_i2c 42961 1 saa7134
i2c_core 56129 2 saa7134,ir_kbd_i2c
ir_common 63173 2 saa7134,ir_kbd_i2c
videodev 58049 1 saa7134
v4l1_compat 44613 2 saa7134,videodev
v4l2_common 57153 3 saa7134,compat_ioctl32,videodev
However, I am seeing an error in dmesg of domU
# dmesg | grep saa
saa7130/34: v4l2 driver version 0.2.14 loaded
saa7130[0]: found at 0000:00:00.0, rev: 1, irq: 17, latency: 64, mmio:
0xfebffc00
saa7130[0]: subsystem: 185b:c901, board: Compro Videomate DVB-T200
[card=71,autodetected]
saa7130[0]: can't ioremap() MMIO memory
saa7134: probe of 0000:00:00.0 failed with error -5
Any suggestions?
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