Hi

I'm interested in PCI passthrough support.

I downloaded Linux Kernel 2.6.28-rc7 and build and ran KVM (which
is KVM-79) on this kernel.
I started KVM with the following command-lines:
$ qemu-system-x86_64 -boot c -m 512 -hda test.qcow -localtime -k
en-us -pcidevice host=00:19.0
(00:19.0 is Intel(R) PRO/1000 Network Connection Device)

However, KVM caused the following errors:
Could not notify kernel about assigned device "00:19.0"
register_real_device: Device or resource busy
Segmantation_fault

dmesg messages were as follows:
$ dmesg
[  151.483167] [drm] Initialized drm 1.1.0 20060810
[  151.525100] pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low)
-> IRQ 16
[  151.525105] pci 0000:00:02.0: setting latency timer to 64
[  151.525193] pci 0000:00:02.0: irq 505 for MSI/MSI-X
[  151.525309] [drm] Initialized i915 1.6.0 20080730 on minor 0
[  187.854117] set status page addr 0x00033000
[  823.246792] kvm: guest NX capability removed
[  823.311659] kvm: guest NX capability removed
[  823.487849] qemu-system-x86[5940]: segfault at 1dc ip 0807c446
sp 96420110 error 4 in qemu-system-x86_64[8048000+194000]
[  837.010304] kvm: guest NX capability removed
[  837.019163] e1000e 0000:00:19.0: BAR 0: can't reserve mem
region [0xe0400000-0xe041ffff]
[  837.019163] kvm_vm_ioctl_assign_device: Could not get access to
device regions
[  837.019194] kvm: guest NX capability removed
[  837.219560] qemu-system-x86[5944]: segfault at 1dc ip 0807c446
sp 9636b110 error 4 in qemu-system-x86_64[8048000+194000]

I think that my cpu and my chipset maybe support VT-x and VT-d.
http://www.intel.co.jp/products/desktop/motherboards/dq35jo/dq35jo-overview.htm
CPU: Intel(R) Core(TM) 2 Duo CPU E6
chipset: Intel(R) Q35 Express Chipset

Any advive or tips will help ?

Thanks,
Kazushi
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