[Xen-devel] Xen-unstable + linux 4.1-mergewindow: problems with PV guest pci passthrough: pcifront pci-0: pciback not responding!!!

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Hi David / Konrad,

Here the other problem i found, which is introduced somewhere in the 
4.1 mergewindow:

on 4.1.0-rc1 (with the one revert to get things booting) i get this in
the PV Guest console:

[    0.517392] crc32c_combine: 8373 self tests passed
[    0.517608] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    0.517655] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    0.517677] cpcihp_generic: Generic port I/O CompactPCI Hot Plug Driver 
version: 0.1
[    0.517684] cpcihp_generic: not configured, disabling.
[    0.517700] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[    0.517713] acpiphp_ibm: ibm_acpiphp_init: acpi_walk_namespace failed
[    0.519849] usbcore: registered new interface driver udlfb
[    0.613289] xen:xen_evtchn: Event-channel device installed
[    0.613436] pcifront pci-0: Installing PCI frontend
[    0.613578] pcifront pci-0: Creating PCI Frontend Bus 0000:00
[    0.613616] pcifront pci-0: PCI host bridge to bus 0000:00
[    0.613624] pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
[    0.613631] pci_bus 0000:00: root bus resource [mem 
0x00000000-0xffffffffffff]
[    0.613638] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.616672] pcifront pci-0: pciback not responding!!!
[    2.613762] clocksource tsc: mask: 0xffffffffffffffff max_cycles: 
0x2e20fd6f2ba, max_idle_ns: 440795302556 ns
[    2.614275] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    2.614682] Linux agpgart interface v0.103
[    2.614731] Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, 
margin is 60 seconds).
[    2.614762] [drm] Initialized drm 1.1.0 20060810
[    2.614789] [drm] radeon kernel modesetting enabled.
[    2.616529] brd: module loaded
[    2.617844] loop: module loaded
[    2.620008] pcifront pci-0: pciback not responding!!!
[    4.621490] pcifront pci-0: pciback not responding!!!
[    6.621866] pcifront pci-0: pciback not responding!!!
[    8.622421] pcifront pci-0: pciback not responding!!!
etc. etc. etc.


Where on 4.0.0 it get:

[    0.442554] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[    0.442583] acpiphp_ibm: ibm_acpiphp_init: acpi_walk_namespace failed
[    0.443293] pcifront pci-0: Allocated pdev @ 0xffff88001ab23c00 
pdev->sh_info @ 0xffff88001937f000
[    0.444885] pcifront pci-0: publishing successful!
[    0.445302] usbcore: registered new interface driver udlfb
[    0.445829] xen:xen_evtchn: Event-channel device installed
[    0.446499] pcifront pci-0: Installing PCI frontend
[    0.446715] pcifront pci-0: Creating PCI Frontend Bus 0000:00
[    0.446951] pcifront pci-0: PCI host bridge to bus 0000:00
[    0.446960] pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
[    0.446968] pci_bus 0000:00: root bus resource [mem 
0x00000000-0xffffffffffff]
[    0.446988] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.447002] pci_bus 0000:00: scanning bus
[    0.447140] pci 0000:00:00.0: [13f6:0111] type 00 class 0x040100
[    0.447520] pci 0000:00:00.0: reg 0x10: [io  0x7800-0x78ff]
[    0.449148] pci 0000:00:00.0: supports D1 D2
[    0.449791] pci_bus 0000:00: fixups for bus
[    0.449794] pci_bus 0000:00: bus scan returning with max=00
[    0.450604] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.451991] Linux agpgart interface v0.103
[    0.452160] Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, 
margin is 60 seconds).
[    0.452222] [drm] Initialized drm 1.1.0 20060810
[    0.452300] [drm] radeon kernel modesetting enabled.
[    0.462384] pcifront pci-0: claiming resource 0000:00:00.0/0

But i thought the patches that would change pci bus scanning were destined for 
4.2 though ...

--
Sander


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel