Hi Alex,
Alex Williamson <alex.william...@redhat.com> wrote:
> On Fri, 2014-02-07 at 01:22 +0100, Maik Broemme wrote:
> > Interesting is the diff between 1st and 2nd boot, so if I do the lspci
> > prior to the booting. The only difference between 1st start and 2nd
> > start are:
> >
> > --- 001-lspci.290x.before.1st.log 2014-02-07 01:13:41.498827928 +0100
> > +++ 004-lspci.290x.before.2nd.log 2014-02-07 01:16:50.966611282 +0100
> > @@ -24,7 +24,7 @@
> > ClockPM- Surprise- LLActRep- BwNot-
> > LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- CommClk+
> > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> > - LnkSta: Speed 5GT/s, Width x16, TrErr- Train- SlotClk+
> > DLActive- BWMgmt- ABWMgmt-
> > + LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
> > DLActive- BWMgmt- ABWMgmt-
> > DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-,
> > OBFF Not Supported
> > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-,
> > OBFF Disabled
> > LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
> > @@ -33,13 +33,13 @@
> > LnkSta2: Current De-emphasis Level: -3.5dB,
> > EqualizationComplete-, EqualizationPhase1-
> > EqualizationPhase2-, EqualizationPhase3-,
> > LinkEqualizationRequest-
> > Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
> > - Address: 0000000000000000 Data: 0000
> > + Address: 00000000fee00000 Data: 0000
> > Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1
> > Len=010 <?>
> > Capabilities: [150 v2] 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-
> > + CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
> > CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
> > AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
> > Capabilities: [270 v1] #19
> >
> > After that if I do suspend-to-ram / resume trick I have again lspci
> > output from before 1st boot.
>
> The Link Status change after X is stopped seems the most interesting to
> me. The MSI change is probably explained by the MSI save/restore of the
> device, but should be harmless since MSI is disabled. I'm a bit
> surprised the Correctable Error Status in the AER capability didn't get
> cleared. I would have thought that a bus reset would have caused the
> link to retrain back to the original speed/width as well. Let's check
> that we're actually getting a bus reset, try this in addition to the
> previous qemu patch. This just enables debug logging for the bus resest
> function. Thanks,
>
Below are the outputs from 2 boots, VGA, load fglrx and start X. (2nd
time X gets killed and oops happened)
- 1st boot:
vfio: vfio_pci_hot_reset(0000:01:00.1) multi
vfio: 0000:01:00.1: hot reset dependent devices:
vfio: 0000:01:00.0 group 1
vfio: 0000:01:00.1 group 1
vfio: 0000:01:00.1 hot reset: Success
vfio: vfio_pci_hot_reset(0000:01:00.1) one
vfio: 0000:01:00.1: hot reset dependent devices:
vfio: 0000:01:00.0 group 1
vfio: vfio: found another in-use device 0000:01:00.0
vfio: vfio_pci_hot_reset(0000:01:00.0) one
vfio: 0000:01:00.0: hot reset dependent devices:
vfio: 0000:01:00.0 group 1
vfio: 0000:01:00.1 group 1
vfio: vfio: found another in-use device 0000:01:00.1
- 2nd boot:
vfio: vfio_pci_hot_reset(0000:01:00.1) multi
vfio: 0000:01:00.1: hot reset dependent devices:
vfio: 0000:01:00.0 group 1
vfio: 0000:01:00.1 group 1
vfio: 0000:01:00.1 hot reset: Success
vfio: vfio_pci_hot_reset(0000:01:00.1) one
vfio: 0000:01:00.1: hot reset dependent devices:
vfio: 0000:01:00.0 group 1
vfio: vfio: found another in-use device 0000:01:00.0
vfio: vfio_pci_hot_reset(0000:01:00.0) one
vfio: 0000:01:00.0: hot reset dependent devices:
vfio: 0000:01:00.0 group 1
vfio: 0000:01:00.1 group 1
vfio: vfio: found another in-use device 0000:01:00.1
> Alex
>
> diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
> index 8db182f..7fec259 100644
> --- a/hw/misc/vfio.c
> +++ b/hw/misc/vfio.c
> @@ -2927,6 +2927,10 @@ static bool vfio_pci_host_match(PCIHostDeviceAddress
> *hos
> host1->slot == host2->slot && host1->function ==
> host2->function);
> }
>
> +#undef DPRINTF
> +#define DPRINTF(fmt, ...) \
> + do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
> +
> static int vfio_pci_hot_reset(VFIODevice *vdev, bool single)
> {
> VFIOGroup *group;
> @@ -3104,6 +3108,15 @@ out_single:
> return ret;
> }
>
> +#undef DPRINTF
> +#ifdef DEBUG_VFIO
> +#define DPRINTF(fmt, ...) \
> + do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
> +#else
> +#define DPRINTF(fmt, ...) \
> + do { } while (0)
> +#endif
> +
> /*
> * We want to differentiate hot reset of mulitple in-use devices vs hot reset
> * of a single in-use device. VFIO_DEVICE_RESET will already handle the case
>
>
--Maik
