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[libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability

Boris Fiuczynski posted 3 patches 6 years, 2 months ago
[libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability
Posted by Boris Fiuczynski 6 years, 2 months ago 
Introduce vfio-ap capability.

Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
---
 src/qemu/qemu_capabilities.c | 2 ++
 src/qemu/qemu_capabilities.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index e228f52ec0..2ca5af3297 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -508,6 +508,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
               /* 315 */
               "vfio-pci.display",
               "blockdev",
+              "vfio-ap",
     );
 
 
@@ -1092,6 +1093,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
     { "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
     { "mch", QEMU_CAPS_DEVICE_MCH },
     { "sev-guest", QEMU_CAPS_SEV_GUEST },
+    { "vfio-ap", QEMU_CAPS_DEVICE_VFIO_AP },
 };
 
 static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 934620ed31..6bb9a2c8f0 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -492,6 +492,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
     /* 315 */
     QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
     QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are supported */
+    QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
-- 
2.17.0

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Re: [libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability
Posted by Thomas Huth 6 years, 2 months ago 
On 2018-10-18 16:54, Boris Fiuczynski wrote:
> Introduce vfio-ap capability.
> 
> Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
> Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
> ---
>  src/qemu/qemu_capabilities.c | 2 ++
>  src/qemu/qemu_capabilities.h | 1 +
>  2 files changed, 3 insertions(+)
> 
> diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
> index e228f52ec0..2ca5af3297 100644
> --- a/src/qemu/qemu_capabilities.c
> +++ b/src/qemu/qemu_capabilities.c
> @@ -508,6 +508,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
>                /* 315 */
>                "vfio-pci.display",
>                "blockdev",
> +              "vfio-ap",
>      );
>  
>  
> @@ -1092,6 +1093,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
>      { "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
>      { "mch", QEMU_CAPS_DEVICE_MCH },
>      { "sev-guest", QEMU_CAPS_SEV_GUEST },
> +    { "vfio-ap", QEMU_CAPS_DEVICE_VFIO_AP },
>  };
>  
>  static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
> diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
> index 934620ed31..6bb9a2c8f0 100644
> --- a/src/qemu/qemu_capabilities.h
> +++ b/src/qemu/qemu_capabilities.h
> @@ -492,6 +492,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
>      /* 315 */
>      QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
>      QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are supported */
> +    QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */
>  
>      QEMU_CAPS_LAST /* this must always be the last item */
>  } virQEMUCapsFlags;
> 

Reviewed-by: Thomas Huth <thuth@redhat.com>

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Re: [libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability
Posted by Chris Venteicher 6 years, 1 month ago 
Quoting Thomas Huth (2018-10-19 06:58:34)
> On 2018-10-18 16:54, Boris Fiuczynski wrote:
> > Introduce vfio-ap capability.
> > 
> > Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
> > Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
> > ---
> >  src/qemu/qemu_capabilities.c | 2 ++
> >  src/qemu/qemu_capabilities.h | 1 +
> >  2 files changed, 3 insertions(+)
> > 
> > diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
> > index e228f52ec0..2ca5af3297 100644
> > --- a/src/qemu/qemu_capabilities.c
> > +++ b/src/qemu/qemu_capabilities.c
> > @@ -508,6 +508,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
> >                /* 315 */
> >                "vfio-pci.display",
> >                "blockdev",
> > +              "vfio-ap",
> >      );
> >  

The statement "On s390, we have cryptographic coprocessor cards,
which are modeled on Linux as devices on the AP bus."
was made in email titled "s390: vfio-ap: guest dedicated crypto adapters"

Does this imply other devices can exist on an AP Bus?

Any chance this should be something like "vfio-ap.crypto" in the same
way a "vfio-pci.display" entry is listed above seemingly implying a
display device on a more generic pci bus? Or does "vfio-ap" always imply
crypto?

Having difficulty sorting out the relationships between adjunct
processor, crypto processor and ap bus from the patch docs and initial
review of the references.

> >
> > @@ -1092,6 +1093,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
> >      { "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
> >      { "mch", QEMU_CAPS_DEVICE_MCH },
> >      { "sev-guest", QEMU_CAPS_SEV_GUEST },
> > +    { "vfio-ap", QEMU_CAPS_DEVICE_VFIO_AP },
> >  };
> >  
> >  static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
> > diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
> > index 934620ed31..6bb9a2c8f0 100644
> > --- a/src/qemu/qemu_capabilities.h
> > +++ b/src/qemu/qemu_capabilities.h
> > @@ -492,6 +492,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
> >      /* 315 */
> >      QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
> >      QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are supported */
> > +    QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */
> >  
> >      QEMU_CAPS_LAST /* this must always be the last item */
> >  } virQEMUCapsFlags;
> > 
> 
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> 
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Re: [libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability
Posted by Boris Fiuczynski 6 years, 1 month ago 
On 10/25/18 5:17 AM, Chris Venteicher wrote:
> Quoting Thomas Huth (2018-10-19 06:58:34)
>> On 2018-10-18 16:54, Boris Fiuczynski wrote:
>>> Introduce vfio-ap capability.
>>>
>>> Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
>>> Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
>>> ---
>>>   src/qemu/qemu_capabilities.c | 2 ++
>>>   src/qemu/qemu_capabilities.h | 1 +
>>>   2 files changed, 3 insertions(+)
>>>
>>> diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
>>> index e228f52ec0..2ca5af3297 100644
>>> --- a/src/qemu/qemu_capabilities.c
>>> +++ b/src/qemu/qemu_capabilities.c
>>> @@ -508,6 +508,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
>>>                 /* 315 */
>>>                 "vfio-pci.display",
>>>                 "blockdev",
>>> +              "vfio-ap",
>>>       );
>>>   
> 
> The statement "On s390, we have cryptographic coprocessor cards,
> which are modeled on Linux as devices on the AP bus."
> was made in email titled "s390: vfio-ap: guest dedicated crypto adapters"
> 
Patch 6 of the qemu patch series 
(https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg01997.html) 
has a very detailed documentation (docs/vfio-ap.txt) covering IBM 
Adjunct Processor (AP) Cryptographic Facility.

> Does this imply other devices can exist on an AP Bus?
The AP bus is a linux construct used to represent the cryptographic 
devices available via the Adjunct Processor Cryptographic Facility.
This implies even so there are different cards they all are crypto cards.

> 
> Any chance this should be something like "vfio-ap.crypto" in the same
> way a "vfio-pci.display" entry is listed above seemingly implying a
> display device on a more generic pci bus? Or does "vfio-ap" always imply
> crypto?
Yes, it always is crypto only. Actually a vfio-ap mediated device is 
used to specify the configuration of the ap bus including all cards, 
usage domains and control domains passed into a qemu guest.

> 
> Having difficulty sorting out the relationships between adjunct
> processor, crypto processor and ap bus from the patch docs and initial
> review of the references.
Maybe the KVM forum session of Halil Pasic can help a bit...?
https://events.linuxfoundation.org/wp-content/uploads/2017/12/vfio-ap-The-Perils-of-the-Weird-Halil-Pasic-IBM.pdf

> 
>>>
>>> @@ -1092,6 +1093,7 @@ struct virQEMUCapsStringFlags virQEMUCapsObjectTypes[] = {
>>>       { "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
>>>       { "mch", QEMU_CAPS_DEVICE_MCH },
>>>       { "sev-guest", QEMU_CAPS_SEV_GUEST },
>>> +    { "vfio-ap", QEMU_CAPS_DEVICE_VFIO_AP },
>>>   };
>>>   
>>>   static struct virQEMUCapsStringFlags virQEMUCapsDevicePropsVirtioBalloon[] = {
>>> diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
>>> index 934620ed31..6bb9a2c8f0 100644
>>> --- a/src/qemu/qemu_capabilities.h
>>> +++ b/src/qemu/qemu_capabilities.h
>>> @@ -492,6 +492,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
>>>       /* 315 */
>>>       QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
>>>       QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are supported */
>>> +    QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */
>>>   
>>>       QEMU_CAPS_LAST /* this must always be the last item */
>>>   } virQEMUCapsFlags;
>>>
>>
>> Reviewed-by: Thomas Huth <thuth@redhat.com>
>>
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> 
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> 


-- 
Mit freundlichen Grüßen/Kind regards
    Boris Fiuczynski

IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martina Köderitz
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294

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Re: [libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability
Posted by Boris Fiuczynski 6 years, 1 month ago 
On 10/25/18 1:54 PM, Boris Fiuczynski wrote:
> On 10/25/18 5:17 AM, Chris Venteicher wrote:
>> Quoting Thomas Huth (2018-10-19 06:58:34)
>>> On 2018-10-18 16:54, Boris Fiuczynski wrote:
>>>> Introduce vfio-ap capability.
>>>>
>>>> Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
>>>> Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
>>>> ---
>>>>   src/qemu/qemu_capabilities.c | 2 ++
>>>>   src/qemu/qemu_capabilities.h | 1 +
>>>>   2 files changed, 3 insertions(+)
>>>>
>>>> diff --git a/src/qemu/qemu_capabilities.c 
>>>> b/src/qemu/qemu_capabilities.c
>>>> index e228f52ec0..2ca5af3297 100644
>>>> --- a/src/qemu/qemu_capabilities.c
>>>> +++ b/src/qemu/qemu_capabilities.c
>>>> @@ -508,6 +508,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
>>>>                 /* 315 */
>>>>                 "vfio-pci.display",
>>>>                 "blockdev",
>>>> +              "vfio-ap",
>>>>       );
>>
>> The statement "On s390, we have cryptographic coprocessor cards,
>> which are modeled on Linux as devices on the AP bus."
>> was made in email titled "s390: vfio-ap: guest dedicated crypto adapters"
>>
> Patch 6 of the qemu patch series 
> (https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg01997.html) 
> has a very detailed documentation (docs/vfio-ap.txt) covering IBM 
> Adjunct Processor (AP) Cryptographic Facility.
> 
>> Does this imply other devices can exist on an AP Bus?
> The AP bus is a linux construct used to represent the cryptographic 
> devices available via the Adjunct Processor Cryptographic Facility.
> This implies even so there are different cards they all are crypto cards.
> 
>>
>> Any chance this should be something like "vfio-ap.crypto" in the same
>> way a "vfio-pci.display" entry is listed above seemingly implying a
>> display device on a more generic pci bus? Or does "vfio-ap" always imply
>> crypto?
> Yes, it always is crypto only. Actually a vfio-ap mediated device is 
> used to specify the configuration of the ap bus including all cards, 
> usage domains and control domains passed into a qemu guest.
> 
>>
>> Having difficulty sorting out the relationships between adjunct
>> processor, crypto processor and ap bus from the patch docs and initial
>> review of the references.
> Maybe the KVM forum session of Halil Pasic can help a bit...?
> https://events.linuxfoundation.org/wp-content/uploads/2017/12/vfio-ap-The-Perils-of-the-Weird-Halil-Pasic-IBM.pdf 
Or you could have a look at "Chapter 47. Generic cryptographic device 
driver" here: 
http://public.dhe.ibm.com/software/dw/linux390/docu/l418dd35.pdf

> 
> 
>>
>>>>
>>>> @@ -1092,6 +1093,7 @@ struct virQEMUCapsStringFlags 
>>>> virQEMUCapsObjectTypes[] = {
>>>>       { "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
>>>>       { "mch", QEMU_CAPS_DEVICE_MCH },
>>>>       { "sev-guest", QEMU_CAPS_SEV_GUEST },
>>>> +    { "vfio-ap", QEMU_CAPS_DEVICE_VFIO_AP },
>>>>   };
>>>>   static struct virQEMUCapsStringFlags 
>>>> virQEMUCapsDevicePropsVirtioBalloon[] = {
>>>> diff --git a/src/qemu/qemu_capabilities.h 
>>>> b/src/qemu/qemu_capabilities.h
>>>> index 934620ed31..6bb9a2c8f0 100644
>>>> --- a/src/qemu/qemu_capabilities.h
>>>> +++ b/src/qemu/qemu_capabilities.h
>>>> @@ -492,6 +492,7 @@ typedef enum { /* virQEMUCapsFlags grouping 
>>>> marker for syntax-check */
>>>>       /* 315 */
>>>>       QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
>>>>       QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are 
>>>> supported */
>>>> +    QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */
>>>>       QEMU_CAPS_LAST /* this must always be the last item */
>>>>   } virQEMUCapsFlags;
>>>>
>>>
>>> Reviewed-by: Thomas Huth <thuth@redhat.com>
>>>
>>> -- 
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>>> https://www.redhat.com/mailman/listinfo/libvir-list
>>
>> -- 
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>> libvir-list@redhat.com
>> https://www.redhat.com/mailman/listinfo/libvir-list
>>
> 
> 


-- 
Mit freundlichen Grüßen/Kind regards
    Boris Fiuczynski

IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martina Köderitz
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294

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Re: [libvirt] [PATCH v2 1/3] qemu: add vfio-ap capability
Posted by Chris Venteicher 6 years, 1 month ago 
Quoting Boris Fiuczynski (2018-10-25 07:35:44)
> On 10/25/18 1:54 PM, Boris Fiuczynski wrote:
> > On 10/25/18 5:17 AM, Chris Venteicher wrote:
> >> Quoting Thomas Huth (2018-10-19 06:58:34)
> >>> On 2018-10-18 16:54, Boris Fiuczynski wrote:
> >>>> Introduce vfio-ap capability.
> >>>>
> >>>> Signed-off-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
> >>>> Reviewed-by: Bjoern Walk <bwalk@linux.ibm.com>
> >>>> ---
> >>>>   src/qemu/qemu_capabilities.c | 2 ++
> >>>>   src/qemu/qemu_capabilities.h | 1 +
> >>>>   2 files changed, 3 insertions(+)
> >>>>
> >>>> diff --git a/src/qemu/qemu_capabilities.c
> >>>> b/src/qemu/qemu_capabilities.c
> >>>> index e228f52ec0..2ca5af3297 100644
> >>>> --- a/src/qemu/qemu_capabilities.c
> >>>> +++ b/src/qemu/qemu_capabilities.c
> >>>> @@ -508,6 +508,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
> >>>>                 /* 315 */
> >>>>                 "vfio-pci.display",
> >>>>                 "blockdev",
> >>>> +              "vfio-ap",
> >>>>       );
> >>
> >> The statement "On s390, we have cryptographic coprocessor cards,
> >> which are modeled on Linux as devices on the AP bus."
> >> was made in email titled "s390: vfio-ap: guest dedicated crypto adapters"
> >>
> > Patch 6 of the qemu patch series
> > (https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg01997.html)
> > has a very detailed documentation (docs/vfio-ap.txt) covering IBM
> > Adjunct Processor (AP) Cryptographic Facility.
> >
> >> Does this imply other devices can exist on an AP Bus?
> > The AP bus is a linux construct used to represent the cryptographic
> > devices available via the Adjunct Processor Cryptographic Facility.
> > This implies even so there are different cards they all are crypto cards.
> >
> >>
> >> Any chance this should be something like "vfio-ap.crypto" in the same
> >> way a "vfio-pci.display" entry is listed above seemingly implying a
> >> display device on a more generic pci bus? Or does "vfio-ap" always imply
> >> crypto?
> > Yes, it always is crypto only. Actually a vfio-ap mediated device is
> > used to specify the configuration of the ap bus including all cards,
> > usage domains and control domains passed into a qemu guest.
> >
> >>
> >> Having difficulty sorting out the relationships between adjunct
> >> processor, crypto processor and ap bus from the patch docs and initial
> >> review of the references.
> > Maybe the KVM forum session of Halil Pasic can help a bit...?
> > https://events.linuxfoundation.org/wp-content/uploads/2017/12/vfio-ap-The-Perils-of-the-Weird-Halil-Pasic-IBM.pdf
> Or you could have a look at "Chapter 47. Generic cryptographic device
> driver" here:
> http://public.dhe.ibm.com/software/dw/linux390/docu/l418dd35.pdf

Thanks for the info.  The Halil 2018 doc was good for orienting.

Can't say I understand the details but I don't see problems in the
source code it's self.

Reviewed-by: Chris Venteicher <cventeic@redhat.com>
> >
> >
> >>
> >>>>
> >>>> @@ -1092,6 +1093,7 @@ struct virQEMUCapsStringFlags
> >>>> virQEMUCapsObjectTypes[] = {
> >>>>       { "vhost-vsock-device", QEMU_CAPS_DEVICE_VHOST_VSOCK },
> >>>>       { "mch", QEMU_CAPS_DEVICE_MCH },
> >>>>       { "sev-guest", QEMU_CAPS_SEV_GUEST },
> >>>> +    { "vfio-ap", QEMU_CAPS_DEVICE_VFIO_AP },
> >>>>   };
> >>>>   static struct virQEMUCapsStringFlags
> >>>> virQEMUCapsDevicePropsVirtioBalloon[] = {
> >>>> diff --git a/src/qemu/qemu_capabilities.h 
> >>>> b/src/qemu/qemu_capabilities.h
> >>>> index 934620ed31..6bb9a2c8f0 100644
> >>>> --- a/src/qemu/qemu_capabilities.h
> >>>> +++ b/src/qemu/qemu_capabilities.h
> >>>> @@ -492,6 +492,7 @@ typedef enum { /* virQEMUCapsFlags grouping 
> >>>> marker for syntax-check */
> >>>>       /* 315 */
> >>>>       QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */
> >>>>       QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are 
> >>>> supported */
> >>>> +    QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */
> >>>>       QEMU_CAPS_LAST /* this must always be the last item */
> >>>>   } virQEMUCapsFlags;
> >>>>
> >>>
> >>> Reviewed-by: Thomas Huth <thuth@redhat.com>
> >>>
> >>> -- 
> >>> libvir-list mailing list
> >>> libvir-list@redhat.com
> >>> https://www.redhat.com/mailman/listinfo/libvir-list
> >>
> >> -- 
> >> libvir-list mailing list
> >> libvir-list@redhat.com
> >> https://www.redhat.com/mailman/listinfo/libvir-list
> >>
> > 
> > 
> 
> 
> -- 
> Mit freundlichen Grüßen/Kind regards
>     Boris Fiuczynski
> 
> IBM Deutschland Research & Development GmbH
> Vorsitzender des Aufsichtsrats: Martina Köderitz
> Geschäftsführung: Dirk Wittkopp
> Sitz der Gesellschaft: Böblingen
> Registergericht: Amtsgericht Stuttgart, HRB 243294
> 

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