Re: VT-d regression issue

[Gleb Natapov <gleb@redhat.com>]

On Thu, Jul 22, 2010 at 04:47:12PM +0800, Hao, Xudong wrote:
> [root@vt-nhm1 ~]# lspci -vv -s 01:00.0
> 01:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) (rev 06)
> 	Subsystem: Intel Corporation PRO/1000 PT Desktop Adapter
> 	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-
> 	Interrupt: pin A routed to IRQ 16
> 	Region 0: Memory at d3c20000 (32-bit, non-prefetchable) [size=128K]
> 	Region 1: Memory at d3c00000 (32-bit, non-prefetchable) [size=128K]
> 	Region 2: I/O ports at 5000 [size=32]
> 	Expansion ROM at d3e00000 [size=128K]
> 	Capabilities: [c8] Power Management version 2
> 		Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
> 		Status: D0 PME-Enable- DSel=0 DScale=1 PME-
> 	Capabilities: [d0] MSI: Mask- 64bit+ Count=1/1 Enable-
> 		Address: 00000000fee00418  Data: 0000
> 	Capabilities: [e0] Express (v1) Endpoint, MSI 00
> 		DevCap:	MaxPayload 256 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
> 			ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
> 		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
> 			RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
> 			MaxPayload 128 bytes, MaxReadReq 512 bytes
> 		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
> 		LnkCap:	Port #0, Speed 2.5GT/s, Width x1, ASPM L0s, Latency L0 <4us, L1 <64us
> 			ClockPM- Surprise- LLActRep- BwNot-
> 		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
> 			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> 		LnkSta:	Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
> 	Capabilities: [100] Advanced Error Reporting
> 		UESta:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol-
> 		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
> 		UESvrt:	DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
> 		CESta:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
> 		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
> 		AERCap:	First Error Pointer: 14, GenCap- CGenEn- ChkCap- ChkEn-
> 	Capabilities: [140] Device Serial Number 82-ff-04-ff-ff-21-1b-00
> 	Kernel driver in use: pci-stub
> 	Kernel modules: e1000e
> 

Can you try this patch for qemu-kvm please?

diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 2bba22f..7240985 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -238,9 +238,10 @@ static void assigned_dev_iomem_map_slow(PCIDevice *pci_dev, int region_num,
     DEBUG("%s", "slow map\n");
     if (region_num == PCI_ROM_SLOT)
         m = cpu_register_io_memory(slow_bar_read, NULL, region);
-    else
+    else {
         m = cpu_register_io_memory(slow_bar_read, slow_bar_write, region);
-    cpu_register_physical_memory(e_phys, e_size, m);
+        cpu_register_physical_memory(e_phys, e_size, m);
+    }
 
     /* MSI-X MMIO page */
     if ((e_size > 0) &&
--
			Gleb.