[Xen-devel] pt_pci_write_config: Warning: Guest attempt to set address to unused Base Address Register. [00:03.0][Offset:30h][Length:4]

[Tim Moore <timothy.moore@xxxxxxxxxxx>]

Hi Ian,

 

I noticed that you updated the qemu-dm passthrough debug messages recently and was wondering if you could help me with this issue?

(Please see xen-devel postings for further info)

 

To sum things up, I have a non-hvm DomU with PCI Passthrough working successfully. The problem is that this is not working for any hvm DomU. Is this BAR warning related to my issue? I`m assume the vendor driver is attempting to set BAR and not just accepting the values passed in.

 

What I find strange is that I am using the vendor driver under the non-hvm DomU also. Maybe pcifront is doing something that qemu-dm is not ?

 

Here is the qemu-dm log output … (relevant parts)

 

register_real_device: Assigning real physical device 03:00.0 ...

pt_register_regions: IO region registered (size=0x01000000 base_addr=0xb2000000)

pt_register_regions: IO region registered (size=0x10000000 base_addr=0xe000000c)

pt_register_regions: IO region registered (size=0x02000000 base_addr=0xb0000004)

pt_register_regions: IO region registered (size=0x00000080 base_addr=0x00001001)

pt_msi_setup: msi mapped with pirq ff

register_real_device: Real physical device 03:00.0 registered successfuly!

IRQ type = MSI-INTx

Register xen platform.

Done register platform.

platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw state.

xs_read(/local/domain/0/device-model/3/xen_extended_power_mgmt): read error

xs_read(): vncpasswd get error. /vm/900c41f9-a3f6-d78f-2270-93e116ee07e7/vncpasswd.

I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0

pt_pci_write_config: Warning: Guest attempt to set address to unused Base Address Register. [00:03.0][Offset:30h][Length:4]

pt_iomem_map: e_phys=e0000000 maddr=e0000000 type=8 len=268435456 index=1 first_map=1

cirrus vga map change while on lfb mode

pt_iomem_map: e_phys=f2000000 maddr=b0000000 type=0 len=33554432 index=3 first_map=1

pt_iomem_map: e_phys=f4000000 maddr=b2000000 type=0 len=16777216 index=0 first_map=1

pt_pci_write_config: Warning: Guest attempt to set address to unused Base Address Register. [00:03.0][Offset:30h][Length:4]

pt_ioport_map: e_phys=c200 pio_base=1000 len=128 index=5 first_map=1

mapping vram to f0000000 - f0400000

platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw state.

platform_fixed_ioport: changed ro/rw state of ROM memory area. now is ro state.

track_dirty_vram(f0000000, 26) failed (-1, 22)

track_dirty_vram(f0000000, 26) failed (-1, 22)

track_dirty_vram(f0000000, 26) failed (-1, 22)

track_dirty_vram(f0000000, 26) failed (-1, 22)

 

Many Thanks,

Tim

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