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[Xen-users] (XEN) physdev.c:61: dom1: map invalid irq 1251

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Subject: [Xen-users] (XEN) physdev.c:61: dom1: map invalid irq 1251
From: "Rome Pierce" <romep@xxxxxx>
Date: Sat, 01 Jan 2011 16:59:39 +0100
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i'm using the latest Xen 4.0 testing from the mercurial repository and i want 
to passthrough my Intel Core gpu. But somehow it has a weird IRQ of 1251. So i 
cant start the vm if i set pci=['00:02.0']. The device is bound to the pciback 
driver correctly.

The interesting part of xm dmesg (appears when i start the vm):

(XEN) [VT-D]iommu.c:1484: d0:PCI: unmap bdf = 0:2.0
(XEN) [VT-D]iommu.c:1362: d1:PCI: map bdf = 0:2.0
(XEN) physdev.c:61: dom1: map invalid irq 1251
(XEN) [VT-D]io.c:300: d1: bind: m_gsi=55 g_gsi=36 device=5 intx=0
(XEN) [VT-D]iommu.c:1484: d1:PCI: unmap bdf = 0:2.0
(XEN) [VT-D]iommu.c:1362: d0:PCI: map bdf = 0:2.0

lspci -vvv:

00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated 
Graphics Controller (rev 12) (prog-if 00 [VGA controller])
        Subsystem: Micro-Star International Co., Ltd. Device 7636
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 1251
        Region 0: Memory at fb800000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at cc00 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
                Address: fee0800c  Data: 4161
        Capabilities: [d0] Power Management version 2
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA 
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [a4] PCI Advanced Features
                AFCap: TP+ FLR+
                AFCtrl: FLR-
                AFStatus: TP-
        Kernel driver in use: pciback

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