Re: xen 4.2 unstable; HVM; 2.6.39.3; HD/Network card error

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Jul 18, 2011 at 12:47:49PM +0100, Stefano Stabellini wrote:
> On Sun, 17 Jul 2011, Walter Robert Ditzler wrote:
> > hi folks,
> > 
> > after long trying i need some help from the big world :-)
> > 
> > question
> > ********
> > when I boot a guest system, tried debian 6.0.2 amd64 firmware, I get errors
> > like:
> > 
> > 1) after click install on debian 6.0.2 installer
> > [0.642450] vbd vbd-5632: 19 xenbus_dev_probe on device/vbd/5632
> > [0.642911] vbd vbd-5632: failed to write error node for device/vbd/5632 (19
> > xenbus_dev_probe on device/vbd/5632)
> > 
> > 2) network
> > no dhcp server found, ask me to setup ip manually, cause no network card
> > found
> > 
> > 3) disk
> > stops at the disk detection, no appropriate driver found
> > 
> > also no hw stuff found while trying to install windows 7 x64.
> > 
> > I have a 4.0.1 on squeeze running and productive, I am not a newbe, but at
> > the end with my latin.
> > 
> > can anyone help me out here?
> > 
> > below my system info's!
> > attached some more system info like:
> > 
> > /var/log/xen
> > - xl-server02.log
> > - qemu-dm-server02.log
> > - xen-hotplug.log
> > 
> > console
> > - dmesg
> > - lspci
> > - xl dmesg
> > 
> > thanks a lot, walter
> > 
> > 
> > guest config
> > ************
> > 
> > ***
> > name            = 'server02'
> > kernel          = '/usr/lib64/xen/boot/hvmloader'
> > builder         = 'hvm'
> > device_model    = '/usr/lib64/xen/bin/qemu-dm'
> > maxmem          = 1024
> > memory          = 1024
> > vcpus           = 1
> > acpi            = 0
> > #apic            = 1
> > 
> > vif             = ['bridge=eth0']
> > disk            =
> > ['phy:/dev/vgmain/lv_server02,xvda,w','phy:/var/xen/firmware-6.0.2.1-amd64-n
> > etinst.iso,hdc:cdrom,r']
> 
> Considering that this is an hvm guest and that you only have one disk,
> it should be hda rather than xvda.
> Also it is probably not a good idea to disable acpi.
> 
> 
> > boot            = 'cd'
> > usbdevice       = 'tablet'
> > 
> > extra           = 'swiotlb=force iommu=soft'
> 
> this is an hvm guest so extra is not going to do much, you need to pass
> these parameters directly to the guest kernel from grub if you want them.

And not sure if you want to do that. You will enable bounce buffer
for _ANY_ DMA transaction. Get rid of that 'swiotlb=force'. You don't
need iommu=soft either as your are running in HVM mode.