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Re: [Xen-devel] pv-ops domU not working with MSI interrupts on Nehalem

  • To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: Bruce Edge <bruce.edge@xxxxxxxxx>
  • Date: Mon, 27 Sep 2010 12:16:50 -0700
  • Cc:
  • Delivery-date: Mon, 27 Sep 2010 12:18:06 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
On Mon, Sep 27, 2010 at 10:24 AM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
>
> On Mon, Sep 27, 2010 at 08:52:39AM -0700, Bruce Edge wrote:
> > One of our developers who is working on a tachyon driver is
> > complaining that the pvops domU kernel is not working for these MSI
> > interrupts.
> > This is using the current head of xen/2.6.32.x on both a single
> > Nahelam 920 and a dual E5540. This behavior is consistent with Xen
> > 4.0.1, 4.0.2.rc1-pre and 4.1.
> >
> > Here are his comments:
> >
> > - the driver has no problem to enable msi interrupt and request the
> > interrupt through kernel functions pci_enable_msi & request_irq
>
> What shows up in the Xen console when you send the 'q' key? Does it
> show that the vector is assigned to the appropiate guest?

The Xen console q key shows that the domU is assigned:

(XEN)     Interrupts { 32, 41-42, 47 }

but the domU thinks it has:

124/125/126/127

Is there some mapping that's taking place, or is this plain wrong?

>
> > - the interrupt does happen. But the interrupt service routine of
> > tachyon driver doesn't detect any interrupt status related to this
> > interrupt, which inhibits the tachyon chip from coming on-line. And
> > there are high count of tachyon interrupt in /proc/interrupts
>
> Is it checking the PCI_STATUS_INTERRUPT or the appropiate register
> in the MMIO BAR?
>

The driver would check the appropriate register (tachyon registers) in
the MMIO to determine the source of interrupts.

> >
> > kaan-18-dpm:~# cat /proc/interrupts | grep TACH
> > 124:     760415          0          0          0          0          0
> >          0          0          0          0          0          0
> >     0          0  xen-pirq-pcifront-msi  HW_TACHYON
> > 125:     762234          0          0          0          0          0
> >          0          0          0          0          0          0
> >     0          0  xen-pirq-pcifront-msi  HW_TACHYON
> > 126:     764180          0          0          0          0          0
> >          0          0          0          0          0          0
> >     0          0  xen-pirq-pcifront-msi  HW_TACHYON
> > 127:     764164          0          0          0          0          0
> >          0          0          0          0          0          0
> >     0          0  xen-pirq-pcifront-msi  HW_TACHYON
>
> Can you provide the full dmesg output?

Attached.

Some possibly related messages on dom0 console:

[ 1882.269778] pciback 0000:07:00.0: enabling device (0000 -> 0003)
[ 1882.269800] xen: registering gsi 32 triggering 0 polarity 1
[ 1882.269827] xen_allocate_pirq: returning irq 32 for gsi 32
[ 1882.269834] xen: --> irq=32
[ 1882.269841] Already setup the GSI :32
[ 1882.269847] pciback 0000:07:00.0: PCI INT A -> GSI 32 (level, low) -> IRQ 32
[ 1882.269866] pciback 0000:07:00.0: setting latency timer to 64
[ 1882.270463] pciback 0000:07:00.0: Driver tried to write to a
read-only configuration space field at offset 0x62, size 2. This may
be harmless, but if you have problems with your device:
[ 1882.270465] 1) see permissive attribute in sysfs
[ 1882.270467] 2) report problems to the xen-devel mailing list along
with details of your device obtained from lspci.
[ 1882.270615]   alloc irq_desc for 478 on node 0
[ 1882.270625]   alloc kstat_irqs on node 0
[ 1882.348411] pciback 0000:07:00.1: enabling device (0000 -> 0003)
[ 1882.348433] xen: registering gsi 42 triggering 0 polarity 1
[ 1882.348440] xen_allocate_pirq: returning irq 42 for gsi 42
[ 1882.348445] xen: --> irq=42
[ 1882.348472] Already setup the GSI :42
[ 1882.348479] pciback 0000:07:00.1: PCI INT B -> GSI 42 (level, low) -> IRQ 42
[ 1882.348497] pciback 0000:07:00.1: setting latency timer to 64
[ 1882.349063] pciback 0000:07:00.1: Driver tried to write to a
read-only configuration space field at offset 0x62, size 2. This may
be harmless, but if you have problems with your device:
[ 1882.349066] 1) see permissive attribute in sysfs
[ 1882.349067] 2) report problems to the xen-devel mailing list along
with details of your device obtained from lspci.
[ 1882.349205]   alloc irq_desc for 477 on node 0
[ 1882.349215]   alloc kstat_irqs on node 0
[ 1882.402893] pciback 0000:07:00.2: enabling device (0000 -> 0003)
[ 1882.402908] xen: registering gsi 47 triggering 0 polarity 1
[ 1882.402913] xen_allocate_pirq: returning irq 47 for gsi 47
[ 1882.402916] xen: --> irq=47
[ 1882.402921] Already setup the GSI :47
[ 1882.402925] pciback 0000:07:00.2: PCI INT C -> GSI 47 (level, low) -> IRQ 47
[ 1882.402938] pciback 0000:07:00.2: setting latency timer to 64
[ 1882.403280] pciback 0000:07:00.2: Driver tried to write to a
read-only configuration space field at offset 0x62, size 2. This may
be harmless, but if you have problems with your device:
[ 1882.403282] 1) see permissive attribute in sysfs
[ 1882.403282] 2) report problems to the xen-devel mailing list along
with details of your device obtained from lspci.
[ 1882.403380]   alloc irq_desc for 476 on node 0
[ 1882.403386]   alloc kstat_irqs on node 0
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr e6f80000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = e6f80
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 3
(XEN)     l3[3] = 702b6003
(XEN)     l2 = ffff8300702b6000
(XEN)     l2_index = 137
(XEN)     l2[137] = 0
(XEN)     l2[137] not present
(XEN) traps.c:466:d0 Unhandled nmi fault/trap [#2] on VCPU 0 [ec=0000]
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc005
(XEN)     l4 = ffff8300706dc000
(XEN)     l4_index = 0
(XEN)     l4[0] = 706db003
(XEN)     l3 = ffff8300706db000
(XEN)     l3_index = 0
(XEN)     l3[0] = 706da003
(XEN)     l2 = ffff8300706da000
(XEN)     l2_index = 6
(XEN)     l2[6] = 0
(XEN)     l2[6] not present
(XEN) [VT-D]iommu.c:824: iommu_fault_status: Primary Pending Fault
(XEN) [VT-D]iommu.c:799: DMAR:[DMA Write] Request device [07:00.0]
fault addr c00000, iommu reg = ffff82c3fff57000
(XEN) DMAR:[fault reason 05h] PTE Write access is not set
(XEN) print_vtd_entries: iommu = ffff83019fffa370 bdf = 7:0.0 gmfn = c00
(XEN)     root_entry = ffff83019ff70000
(XEN)     root_entry[7] = 19cf52001
(XEN)     context = ffff83019cf52000
(XEN)     context[0] = 102_706dc00




-Bruce

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