Re: Test with VT-d patches

[Amit Shah <amit.shah@qumranet.com>]

Hello,

* On Wednesday 03 September 2008 14:07:36 gg@seh.de wrote:
> Hi,
>
> i make some more tests with
> 1) an old APCI1500/PCI card no linux driver support -> so i don't need to
> unload the module. 2) my second network-card Realtek 10/100 MBit.
>
> Both don't work at all. Only my first gigabit-onboard-network-card starts.
>
> Here the output from userspace/dmesg:
>
>
> 1) // Applied Micro Circuits Corp. APCI1500 Signal processing controller
>
> Warning: No DNS servers found
> Registered host PCI device 03:00.0 ("03:00.0") as guest device 00:03.0
> assigned_dev_update_irq: Input/output error
> assigned_dev_update_irq: Input/output error

This means the devices shares the irq with some other device in the system. 
See the "lspci -v" output for details.

> 2) // 03:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> RTL-8139/8139C/8139C+ (rev 10) Registered host PCI device 03:02.0
> ("03:02.0") as guest device 00:03.0 assigned_dev_update_irq: Input/output
> error
>
> [  369.195971] pci 0000:03:02.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
> [  369.326026] kvm_vm_ioctl_assign_irq: couldn't allocate irq for pv device

Same error.

> Sould i update the BIOS if possible/available?

That's not necessary. We don't support assigning devices that share the irq on 
the host with some other device. You can try inserting one device at a time 
and try different PCI slots.

> Could it be a problem with the already assigned patches? (See the first
> E-Mail :The VTD [PATCH1/2] seems already be applied. )

No patches have already been applied to any tree. You'll definitely have to 
apply the 1/2 patch as well.