[Xen-devel] Commit 1aeb1156fa43fe2cd2b5003995b20466cd19a622: "x86 don't change affinity with interrupt unmasked", APCI errors and assorted pci trouble

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Hi Jan,

Commit 1aeb1156fa43fe2cd2b5003995b20466cd19a622:
"x86 don't change affinity with interrupt unmasked",
gives trouble on my AMD box, symptoms:
- APIC errors in xl dmesg that weren't previously there:
  (XEN) [2015-03-26 20:35:37.085] IOAPIC[0]: Set PCI routing entry (6-13 -> 
0x88 -> IRQ 13 Mode:0 Active:0)
  (XEN) [2015-03-26 20:35:37.101] PCI: Using MCFG for segment 0000 bus 00-ff
  (XEN) [2015-03-26 20:35:37.097] IOAPIC[0]: Set PCI routing entry (6-8 -> 0x58 
-> IRQ 8 Mode:0 Active:0)
  (XEN) [2015-03-26 20:35:37.112] IOAPIC[0]: Set PCI routing entry (6-18 -> 
0xb8 -> IRQ 18 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.189] IOAPIC[0]: Set PCI routing entry (6-17 -> 
0xc0 -> IRQ 17 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.420] IOAPIC[1]: Set PCI routing entry (7-29 -> 
0xc8 -> IRQ 53 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.420] IOAPIC[1]: Set PCI routing entry (7-24 -> 
0xd0 -> IRQ 48 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.420] IOAPIC[1]: Set PCI routing entry (7-30 -> 
0xd8 -> IRQ 54 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.420] IOAPIC[1]: Set PCI routing entry (7-12 -> 
0x21 -> IRQ 36 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.420] IOAPIC[1]: Set PCI routing entry (7-13 -> 
0x29 -> IRQ 37 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.421] IOAPIC[1]: Set PCI routing entry (7-16 -> 
0x31 -> IRQ 40 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.495] IOAPIC[1]: Set PCI routing entry (7-28 -> 
0x39 -> IRQ 52 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.498] IOAPIC[0]: Set PCI routing entry (6-16 -> 
0x89 -> IRQ 16 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.498] IOAPIC[1]: Set PCI routing entry (7-14 -> 
0xa9 -> IRQ 38 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:37.548] IOAPIC[0]: Set PCI routing entry (6-22 -> 
0xb9 -> IRQ 22 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:39.620] IOAPIC[1]: Set PCI routing entry (7-9 -> 0xc1 
-> IRQ 33 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:39.646] IOAPIC[1]: Set PCI routing entry (7-8 -> 0xc9 
-> IRQ 32 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:39.647] IOAPIC[1]: Set PCI routing entry (7-23 -> 
0xd1 -> IRQ 47 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:41.732] IOAPIC[1]: Set PCI routing entry (7-5 -> 0xd9 
-> IRQ 29 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:41.779] IOAPIC[1]: Set PCI routing entry (7-4 -> 0x22 
-> IRQ 28 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:41.803] mm.c:803: d0: Forcing read-only access to MFN 
fed00
  (XEN) [2015-03-26 20:35:41.894] IOAPIC[0]: Set PCI routing entry (6-19 -> 
0x2a -> IRQ 19 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:42.057] IOAPIC[1]: Set PCI routing entry (7-22 -> 
0x72 -> IRQ 46 Mode:1 Active:1)
  (XEN) [2015-03-26 20:35:42.093] IOAPIC[1]: Set PCI routing entry (7-27 -> 
0x8a -> IRQ 51 Mode:1 Active:1)

  these:
  (XEN) [2015-03-26 20:35:42.205] APIC error on CPU0: 00(40)
  (XEN) [2015-03-26 20:35:42.372] APIC error on CPU0: 40(40)

  (XEN) [2015-03-26 20:35:42.691] d0 attempted to change d0v1's CR4 flags 
00000660 -> 00000760
  (XEN) [2015-03-26 20:35:42.691] IOAPIC[1]: Set PCI routing entry (7-1 -> 0x9a 
-> IRQ 25 Mode:1 Active:1)

  and this one:
  (XEN) [2015-03-26 20:35:42.707] APIC error on CPU0: 40(40)
  (XEN) [2015-03-26 20:35:43.958] d0 attempted to change d0v0's CR4 flags 
00000660 -> 00000760
  (XEN) [2015-03-26 20:35:43.970] d0 attempted to change d0v2's CR4 flags 
00000660 -> 00000760
  (XEN) [2015-03-26 20:35:43.988] d0 attempted to change d0v3's CR4 flags 
00000660 -> 00000760
  (XEN) [2015-03-26 20:35:43.992] d0 attempted to change d0v4's CR4 flags 
00000660 -> 00000760
  (XEN) [2015-03-26 20:35:43.996] d0 attempted to change d0v5's CR4 flags 
00000660 -> 00000760
  (d1) [2015-03-26 20:40:42.220] mapping kernel into physical memory
  (d1) [2015-03-26 20:40:42.220] about to get started...


- random failures on dom0 SATA devices, the SATA controller is using multiple 
MSI 
  interrupts.

- failues on XHCI controllers passed through to a HVM guest which uses MSI-X
  interrupts. Leading to these in the guest dmesg:
  [  350.246548] xhci_hcd 0000:00:05.0: Looking for event-dma 000000003cdf7140 
trb-start 000000003cdf7240 trb-end 000000003cdf7240 seg-start 000000003cdf7000 
seg-end 000000003cdf73f0
  [  350.246548] xhci_hcd 0000:00:05.0: ERROR Transfer event TRB DMA ptr not 
part of current TD ep_index 1 comp_code 1
  [  350.246548] xhci_hcd 0000:00:05.0: Looking for event-dma 000000003cdf7150 
trb-start 000000003cdf7240 trb-end 000000003cdf7240 seg-start 000000003cdf7000 
seg-end 000000003cdf73f0
  [  350.246548] xhci_hcd 0000:00:05.0: ERROR Transfer event TRB DMA ptr not 
part of current TD ep_index 1 comp_code 1


Reverting this specific commit makes all the troubles go away ..

--
Sander


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