Xen devel - Jul 2009 - A problem about xen no-iommu graphics card passthough

 Hi!
   I want to make windows
work  with native graphics card on xen with no iommu (no vt-d) support.
With many googling, I find that xen with Neocleuse 1:1 No-IOMMU
passthough patches maybe can meet my requestment.
   I download and compile a copy of direct-io.hg source, and
pass my graphics card to hvm windows domU.  I hide the
graphics card from dom0 linux with backpci.hide boot option, and allow
dom0 linux auto loading windows hvm config. When xen dom0 linux booting, no any
booting information show on the screen, because there are no graphics card
assign to dom0 linux. But when windows hvm domu loading, dom0 linux's
console works, it seem that dom0 linux get the graphics card. While windows domu
can not show anything on the screen.
   I use xm list command to see that both
dom0 and windows domu is running. Where is the windows booting information goes?
Can someone know this problem. The following is my xen grub config and hvm
config file.
 
I use the lspci command, and get the graphics card pci info:
01:00.0 VGA compatible controller: nVidia Corporation Unknown device 05e6 (rev
a1)
 
 
=================grub.conf=========================================================title
Fedora Core (2.6.18.8-xen)
 root (hd0,3)
 kernel /boot/xen-3.0.gz nativedom=1 nativedom_mem=1024
 module /boot/vmlinuz-2.6.18.8 ro root=LABEL=LINUXZ rhgb quiet
pciback.hide=(0000:01:00.0)
 module /boot/initrd-2.6.18.8.img
title Fedora Core (2.6.18-1.2798.fc6)
 root (hd0,3)
 kernel /boot/vmlinuz-2.6.18-1.2798.fc6 ro root=LABEL=LINUXZ rhgb quiet
 initrd /boot/initrd-2.6.18-1.2798.fc6.img
 
 
 
=================winxp.hvm=========================================================import
os, re
arch = os.uname()[4]
if re.search('64', arch):
    arch_libdir = 'lib64'
else:
    arch_libdir = 'lib'

kernel = "/usr/lib/xen/boot/hvmloader"

builder='hvm'

memory = 1024

shadow_memory = 8

name = "WinXP"
 
apic=1

# Nativedomain enable
nativedom = 1
 
# Nativedomain pci assgin
pci = ['01:00.0']

disk = [ 'phy:/dev/hda,ioemu:hda,w' ]


device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'

boot="cda"

# enable SDL library for graphics, default = 0
sdl=0
 
# enable VNC library for graphics, default = 1
vnc=0

# enable stdvga, default = 0 (use cirrus logic device model)
stdvga=0
 
 
 
 
 
 

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