Hello
Can anyone share a known working config for xen which would transfer a serial interface ( add-on card preferably, mine uses e880-e887 : 0000:03:05.0 / ec00-ec07 : 0000:03:05.0 ) to a DomU ? I've been trying with the stock packages from Centos 5.5 ( fully updated) and also with gitco's 3.4.3 but after 2 days of googling and testing we still fail to access the serial interface from DomU. No matter what we've tried, - in DomU there is no reference to any kind of serial ports in /proc/{interrupts,ioports} - the test program which accesses ttyS0 fails ( it works just fine in dom0) even after manually loading parport_serial in DomU
/dev/ttyS{0..3} do get created by default, if that matters.
Here is the content of the config file, after the last attempt (which uses gitco's xen, but we failed similarly with the stock packages):
name = "testr" uuid = "57baf51a-e293-fa35-9f2e-056a1c0e322a" maxmem = 512 memory = 512 vcpus = 1 bootloader = "/usr/bin/pygrub" on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ "type=vnc,vncunused=1,keymap=en-us" ] disk = [ "tap:aio:/var/lib/xen/images/testr,xvda,w" ] vif = [ "mac=00:16:36:0c:aa:1a,bridge=xenbr0,script=vif-bridge" ] irq = [11 ] ioports = [ "ec00-ec07","e080-e08f" ] // we also tried to pass all the IO ports referenced in lspci -vvv
[root@Dom0]#lspci -vvv 03:05.0 Communication controller: NetMos Technology PCI 9835 Multi-I/O Controller (rev 01) Subsystem: LSI Logic / Symbios Logic 1P2S Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium
TAbort- <TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 11 Region 0: I/O ports at ec00 [size=8] Region 1: I/O ports at e880 [size=8] Region 2: I/O ports at e800 [size=8] Region 3: I/O ports at e480 [size=8] Region 4: I/O ports at e400 [size=8] Region 5: I/O ports at e080 [size=16]
[root@Dom0 ~]# dmesg | grep ttyS
[root@Dom0 ~]# cat /etc/modprobe.d/blacklist #[...] blacklist 8250 blacklist 8250_pnp blacklist serial_core blacklist parport_serial blacklist 8250_pci
[root@Dom0 ~]# grep xen /etc/grub.conf title CentOS (2.6.18-194.el5xen) kernel /xen.gz-3.4.3 module /vmlinuz-2.6.18-194.el5xen ro root=/dev/VolGroup00/LogVol00 module /initrd-2.6.18-194.el5xen.img title CentOS (2.6.18-194.8.1.el5xen) kernel /xen.gz-3.4.3 module /vmlinuz-2.6.18-194.8.1.el5xen ro root=/dev/VolGroup00/LogVol00 xencons=off module /initrd-2.6.18-194.8.1.el5xen.img
[root@Dom0 ~]# uname -a Linux Dom0 3 2.6.18-194.8.1.el5xen #1 SMP Thu Jul 1 19:41:05 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
sniff from the boot messages in tge DomU:
XENBUS: Device with no driver: device/vbd/51712 XENBUS: Device with no driver: device/vif/0 XENBUS: Device with no driver: device/ioports/0 XENBUS: Device with no driver: device/ioports/1 XENBUS: Device with no driver: device/ioports/2 XENBUS: Device with no driver: device/ioports/3 XENBUS: Device with no driver: device/ioports/4 XENBUS: Device with no driver: device/ioports/5 XENBUS: Device with no driver: device/irq/0 XENBUS: Device with no driver: device/console/0
[root@DomU ~]# cat /proc/interrupts CPU0 256: 7433 Dynamic-irq timer0 257: 0 Dynamic-irq resched0 258: 0 Dynamic-irq callfunc0 259: 554 Dynamic-irq xenbus 260: 705 Dynamic-irq xencons 261: 802 Dynamic-irq xenfb 262: 0 Dynamic-irq xenkbd 263: 6607 Dynamic-irq blkif 264: 8959 Dynamic-irq eth0 NMI: 0 LOC: 0 ERR: 0 MIS: 0
[root@DomU ~]# cat /proc/ioports 0000-001f : dma1 0020-0021 : pic1 0040-0043 : timer0 0050-0053 : timer1 0060-0060 : keyboard 0064-0064 : keyboard 0080-008f : dma page reg 00a0-00a1 : pic2 00c0-00df : dma2 00f0-00ff : fpu
[root@DomU ~]# lsmod Module Size Used by 8250_pnp 43969 0 parport_serial 41153 0 8250_pci 56257 1 parport_serial 8250 86057 2 8250_pnp,8250_pci serial_core 56385 1 8250 [...]
[root@DomU ~]# uname -a Linux DomU 2.6.18-194.8.1.el5xen #1 SMP Thu Jul 1 19:41:05 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
TIA
manuel