+Gerd Hi David, Sorry for the delayed response. I was able to reproduce your issue with nec-usb-xhci, in my previous testing we have tested with qemu-xhci model which was good. I would look further into this.
@Gerd: Do you have any high level comments on this ? Regards, Sai Pavan > -----Original Message----- > From: Dr. David Alan Gilbert <dgilb...@redhat.com> > Sent: Wednesday, November 11, 2020 10:46 PM > To: kra...@redhat.com; Sai Pavan Boddu <saip...@xilinx.com>; > marcandre.lur...@redhat.com > Cc: qemu-devel@nongnu.org > Subject: nec-usb-xhci migration breakage > > Hi, > Somewhere between 5.1.0 and 5.2.0-rc1 there's a migration breakage on the > nec-usb-xhci device: > > [dgilbert@dgilbert-t580 try]$ ./x86_64-softmmu/qemu-system-x86_64 -M pc- > q35-5.1 -device nec-usb-xhci -nographic -incoming tcp::4444 > qemu-system-x86_64: get_pci_config_device: Bad config data: i=0x72 read: 88 > device: 80 cmask: ff wmask: 71 w1cmask:0 > qemu-system-x86_64: Failed to load PCIDevice:config > qemu-system-x86_64: Failed to load xhci:parent_obj > qemu-system-x86_64: error while loading state for instance 0x0 of device > '0000:00:03.0/xhci' > qemu-system-x86_64: load of migration failed: Invalid argument > > lspci is showing the MSI count ifferent, but I'm not sure if that's the only > problem or not: > > 5.1.0 showing: > [root@localhost ~]# lspci -v -s 00:03.0 -v > 00:03.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller > (rev 03) (prog-if 30 [XHCI]) > Subsystem: Red Hat, Inc. QEMU Virtual Machine > 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, Cache Line Size: 64 bytes > Interrupt: pin A routed to IRQ 23 > Region 0: Memory at febd4000 (64-bit, non-prefetchable) [size=16K] > Capabilities: [90] MSI-X: Enable+ Count=16 Masked- > Vector table: BAR=0 offset=00003000 > PBA: BAR=0 offset=00003800 > Capabilities: [a0] Express (v2) Root Complex Integrated Endpoint, MSI > 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0 > ExtTag- RBE+ > DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- > TransPend- > DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-, > OBFF Not Supported > AtomicOpsCap: 32bit- 64bit- 128bitCAS- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, > OBFF > Disabled > AtomicOpsCtl: ReqEn- > Capabilities: [70] MSI: Enable- Count=1/16 Maskable- 64bit+ > Address: 0000000000000000 Data: 0000 > Kernel driver in use: xhci_hcd > > 5.2.0rc1 showing > [root@localhost ~]# lspci -v -s 00:03.0 -v > 00:03.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller > (rev 03) (prog-if 30 [XHCI]) > Subsystem: Red Hat, Inc. QEMU Virtual Machine > 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, Cache Line Size: 64 bytes > Interrupt: pin A routed to IRQ 23 > Region 0: Memory at febd4000 (64-bit, non-prefetchable) [size=16K] > Capabilities: [90] MSI-X: Enable+ Count=1 Masked- > Vector table: BAR=0 offset=00003000 > PBA: BAR=0 offset=00003800 > Capabilities: [a0] Express (v2) Root Complex Integrated Endpoint, MSI > 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0 > ExtTag- RBE+ > DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- > TransPend- > DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-, > OBFF Not Supported > AtomicOpsCap: 32bit- 64bit- 128bitCAS- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, > OBFF > Disabled > AtomicOpsCtl: ReqEn- > Capabilities: [70] MSI: Enable- Count=1/1 Maskable- 64bit+ > Address: 0000000000000000 Data: 0000 > Kernel driver in use: xhci_hcd > > I see there's quite a few differences in the output of info qtree for the > device. > > Dave > > -- > Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
