Re: [Qemu-devel] [Spice-devel] Vioserial of Windows guest OS on Qemu 0.15

[Charles . Tsai-蔡清海-研究發展部]

Vadim,

Thank you for your prompt reply. Here are the information for our test case.


1) we use the following command line to launch the guest OS


/usr/bin/kvm -S -M pc-0.14 -enable-kvm -m 1024 -smp 
1,sockets=1,cores=1,threads=1 -name win_xp -uuid 
d9388815-ddd3-c38e-33c2-a9d5fcc7a775 -nodefconfig -nodefaults -chardev 
socket,id=charmonitor,path=/var/lib/libvirt/qemu/win_xp.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=readline
-rtc base=localtime
-device 
virtio-serial-pci,id=virtio-serial0,bus=pci.0,multifunction=on,addr=0x5.0x0
-drive file=/media/Images/Windows-XP.img,if=none,id=drive-ide0-0-0,format=raw
-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1
-netdev tap,fd=17,id=hostnet0
-device 
rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:e8:dc:b1,bus=pci.0,multifunction=on,addr=0x3.0x0
-chardev pty,id=charserial0
-device isa-serial,chardev=charserial0,id=serial0
-chardev spicevmc,id=charchannel0,name=vdagent
-device 
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
-usb -device usb-tablet,id=input0
-spice port=5900,addr=0.0.0.0,disable-ticketing
-vga qxl -global qxl-vga.vram_size=67108864 -device 
virtio-balloon-pci,id=balloon0,bus=pci.0,multifunction=on,addr=0x4.0x0



2). In Guest Windows XP OS


When the following callback function of the vioserial device  is called in 
guest OS. The allocated resources is empty.


VIOSerialEvtDevicePrepareHardware() ---This function is to get the I/O address 
of the vioserial device and map the physical address to the logical address 
space.

I added the following trace and the value of nListSize is ZERO.
TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "%s (nListSize=%d)\n", 
__FUNCTION__,nListSize); 


So far, we have tested Qemu 0.14 without any problem but Qemu 0.15 seemed to be 
broken in vioserial device.
Let me know if you need further information. Thanks.




-----Original Message-----
From: Vadim Rozenfeld [mailto:address@hidden 
Sent: Sunday, January 15, 2012 7:42 PM
To: Stefan Hajnoczi
Cc: Charles.Tsai-蔡清海-研究發展部; Alon Levy; address@hidden; Alex Huang-黃必賢-研究發展部; 
qemu-devel
Subject: Re: [Spice-devel] Vioserial of Windows guest OS on Qemu 0.15

On Sun, 2012-01-15 at 11:27 +0000, Stefan Hajnoczi wrote:
> 2012/1/14 Charles.Tsai-蔡清海-研究發展部 <address@hidden>:
> >        I tested Qemu 0.15 for Windows XP guest OS. But I found that the 
> > Virtual Serial I/O driver failed in driver initialization.
> >        The root cause of this problem is because the hardware resources(I/O 
> > in this device) is not allocated to the virtual serial I/O.
> >        When I debugged on the vioserial driver, no hardware resource 
> > actually is allocated to this device.
> >        This bug seems to be in the area of Qemu. Do you know whom I can 
> > consult to fix this problem? Please let me know if you know the group or 
> > the person.
> 
> I have CCed Vadim (virtio Windows driver) and the QEMU mailing list.
> 
> Please post your QEMU command-line so we can see how the guest is configured.
> 
> You mentioned that you debugged the driver and hardware resources 
> weren't allocated.  Do you have a virtio PCI device inside the guest 
> for this virtio-serial device?  Were you able to tell which part of 
> driver initialization failed (finding the PCI device, mapping its 
> resources (BARs), etc)?
> 
> Stefan

Could you post "pci info" output?

thanks,
Vadim.