Hi. I'd like to experiment with host device passthrough in ovirt 3.6. I have a temperature sensor that connects up to a serial port. I've plugged the device into one of my virt hosts, and through /dev/ttyS1, I can read it. # dmesg | grep ttyS1 [ 1.140221] 00:04: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A ls -l /sys/class/tty/ttyS1/device/driver reveals:

total 0 drwxr-xr-x. 2 root root 0 Nov 7 19:01 . drwxr-xr-x. 7 root root 0 Nov 7 19:01 .. lrwxrwxrwx. 1 root root 0 Nov 9 11:32 00:04 -> ../../../../devices/pnp0/00:04 lrwxrwxrwx. 1 root root 0 Nov 9 11:32 00:05 -> ../../../../devices/pnp0/00:05 --w-------. 1 root root 4096 Nov 9 11:32 bind --w-------. 1 root root 4096 Nov 7 19:01 uevent --w-------. 1 root root 4096 Nov 9 11:32 unbind

# ls -al /sys/devices/pnp0/00\:04/ total 0 drwxr-xr-x. 4 root root 0 Nov 7 19:01 . drwxr-xr-x. 17 root root 0 Nov 7 19:01 .. lrwxrwxrwx. 1 root root 0 Nov 7 19:01 driver -> ../../../bus/pnp/drivers/serial lrwxrwxrwx. 1 root root 0 Nov 9 11:34 firmware_node -> ../../LNXSYSTM:00/device:00/PNP0A08:00/device:18/PNP0501:00 -r--r--r--. 1 root root 4096 Nov 9 11:32 id -r--r--r--. 1 root root 4096 Nov 9 11:34 options drwxr-xr-x. 2 root root 0 Nov 7 19:01 power -rw-r--r--. 1 root root 4096 Nov 9 11:32 resources lrwxrwxrwx. 1 root root 0 Nov 7 19:01 subsystem -> ../../../bus/pnp drwxr-xr-x. 3 root root 0 Nov 7 19:01 tty -rw-r--r--. 1 root root 4096 Nov 7 19:01 uevent

I don't necessarily see this device listed in the host passtshrough. In addition, since I'm able to connect to the serial device right now on the host, this would mean that I need to "blacklist" that device from the host so that when it boots, it doesn't load the driver? Thanks for any help.. Jason. -- Jason Keltz Manager of Development Department of Electrical Engineering and Computer Science York University, Toronto, Canada Tel: 416-736-2100 x. 33570 Fax: 416-736-5872