Re: [Xen-devel] Will Xen support PCI add-on card for serial ports?

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

I had to patch dom0 kernel not to disable the serial interrupt line as it booted. I don’t have the patch conveniently to hand unfortunately, but I think it was to remove the line ‘acpi_ut_evaluate_object(..., “_DIS”, ...)’ in drivers/acpi/pci_link.c:acpi_pci_link_add().

 -- Keir

On 15/7/08 22:20, "Neo Jia" <neojia@xxxxxxxxx> wrote:

> Keir,
>
> I tried your method with my serial port PCI card and I got the Xen output from it. But the Dom0 hangs later. Is there anyway to debug it?
>
>  14 serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
>  15 terminal --timeout=50 serial console
>
>  21 title Xen 3.3 VT-d (unstable)
>  22     root (hd0,0)
>  23     kernel /xen-3.3.gz iommu=0 com1=115200,8n1,0x1070,11 console=com1,vga
>  24     module /vmlinuz-2.6.18.8-xen ro
>  25     module /initrd-2.6.18.8-xen.img
>
> 04:00.0 Serial controller: NetMos Technology PCI 9835 Multi-I/O Controller (rev 01) (prog-if 02 [16550])
>         Subsystem: LSI Logic / Symbios Logic 2S (16C550 UART)
>         Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
>         Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
>         Interrupt: pin A routed to IRQ 11
>         Region 0: I/O ports at 1070 [size=8]
>         Region 1: I/O ports at 1068 [size=8]
>         Region 2: I/O ports at 1060 [size=8]
>         Region 3: I/O ports at 1058 [size=8]
>         Region 4: I/O ports at 1050 [size=8]
>         Region 5: I/O ports at 1040 [size=16]
>
> Thanks,
> Neo
>
> On Mon, Jul 14, 2008 at 12:10 AM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
> > On 13/7/08 01:57, "Neo Jia" <neojia@xxxxxxxxx> wrote:
> >
> > > Thanks a lot! Could you give an Xen command line example?
> >
> > com1=115200,8n1,0xc00,5 console=com1
> >
> > ...would set up console output at 115200 baud, 8 data bits, no parity, 1
> > stop bit. The I/O-port base for the UART has been determined to be 0xc00,
> > and the UART interrupts on IRQ line 5.
> >
> > > BTW, do you know which PCI card can be supported by Xen?
> >
> > No, I only have experience (and even that only a little) with unbranded
> > generic PCI serial cards.
> >
> >  -- Keir




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