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

Mon Jan 16 02:09:01 PST 2012

Dominique,

Thank you for your information and we will try it here.

From: Dominique Rodrigues [mailto:dominique.rodrigues at nanocloud.com] 
Sent: Monday, January 16, 2012 5:51 PM
To: Charles.Tsai-蔡清海-研究發展部
Cc: Stefan Hajnoczi; spice-devel at lists.freedesktop.org; Alex Huang-黃必賢-研究發展部; Vadim Rozenfeld; qemu-devel
Subject: Re: [Spice-devel] Vioserial of Windows guest OS on Qemu 0.15

I currently use qemu-1.0 and I confirm that this version works fine with SPICE.

Regards,

Dominique Rodrigues

  <http://www.nanocloud.com> 
8, rue Lemercier
75017 Paris
France
standard : +33 1 77 69 64 38
529 002 743 R.C.S. Paris

Le 16/01/2012 10:32, Charles.Tsai-蔡清海-研究發展部 a écrit : 

Stefan,

We need  the spice support in Qemu. Does qemu-kvm 1.0 support for spice?

-----Original Message-----
From: Stefan Hajnoczi [mailto:stefanha at gmail.com] 
Sent: Monday, January 16, 2012 4:37 PM
To: Charles.Tsai-蔡清海-研究發展部
Cc: Vadim Rozenfeld; Alon Levy; spice-devel at lists.freedesktop.org; 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 Mon, Jan 16, 2012 at 10:02:22AM +0800, Charles.Tsai-蔡清海-研究發展部 wrote:

	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=0x
	5.0x0 -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,multif
	unction=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=chann
	el0,name=com.redhat.spice.0

I tried the virtio-serial pieces with qemu.git and a RHEL6 guest.  The guest was able to see the "com.redhat.spice.0" port.  This suggests the problem was either fixed since QEMU 0.15 or that it only affects the Windows virtio drivers.

	-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.

I suggest trying qemu-kvm 1.0 or qemu-kvm.git because the issue may have been fixed since 0.15.

If the issue is still present, you could use git-bisect(1) to find the commit that caused behavior to change between 0.14 and 0.15.

Stefan
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