* [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-17 21:57 ` James Hogan
0 siblings, 0 replies; 12+ messages in thread
From: James Hogan @ 2017-03-17 21:57 UTC (permalink / raw)
To: qemu-devel, Michael S. Tsirkin, Marcel Apfelbaum, Jason Wang,
virtualization
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Hi,
I've bisected the following failure of the virtio_net linux v4.10 driver
to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
virtio_net: probe of virtio0 failed with error -22
To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
It appears that adding ",disable-modern=on,disable-legacy=off" to the
virtio-net -device makes it work again.
I presume this should really just work out of the box. Any ideas why it
isn't?
Cheers
James
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^ permalink raw reply [flat|nested] 12+ messages in thread
* [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-17 21:57 ` James Hogan
0 siblings, 0 replies; 12+ messages in thread
From: James Hogan @ 2017-03-17 21:57 UTC (permalink / raw)
To: qemu-devel, Michael S. Tsirkin, Marcel Apfelbaum, Jason Wang,
virtualization
[-- Attachment #1.1: Type: text/plain, Size: 559 bytes --]
Hi,
I've bisected the following failure of the virtio_net linux v4.10 driver
to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
virtio_net: probe of virtio0 failed with error -22
To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
It appears that adding ",disable-modern=on,disable-legacy=off" to the
virtio-net -device makes it work again.
I presume this should really just work out of the box. Any ideas why it
isn't?
Cheers
James
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_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
2017-03-17 21:57 ` James Hogan
@ 2017-03-20 15:21 ` Marcel Apfelbaum
-1 siblings, 0 replies; 12+ messages in thread
From: Marcel Apfelbaum @ 2017-03-20 15:21 UTC (permalink / raw)
To: James Hogan, qemu-devel, Michael S. Tsirkin, Jason Wang, virtualization
On 03/17/2017 11:57 PM, James Hogan wrote:
> Hi,
>
> I've bisected the following failure of the virtio_net linux v4.10 driver
> to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
>
> virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
> virtio_net: probe of virtio0 failed with error -22
>
> To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
>
> It appears that adding ",disable-modern=on,disable-legacy=off" to the
> virtio-net -device makes it work again.
>
> I presume this should really just work out of the box. Any ideas why it
> isn't?
>
Hi,
This is strange. This commit changes virtio devices from legacy to virtio "transitional".
(your command line changes it to legacy)
Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
there is nothing new.
Michael, do you have any idea?
Thanks,
Marcel
> Cheers
> James
>
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-20 15:21 ` Marcel Apfelbaum
0 siblings, 0 replies; 12+ messages in thread
From: Marcel Apfelbaum @ 2017-03-20 15:21 UTC (permalink / raw)
To: James Hogan, qemu-devel, Michael S. Tsirkin, Jason Wang, virtualization
On 03/17/2017 11:57 PM, James Hogan wrote:
> Hi,
>
> I've bisected the following failure of the virtio_net linux v4.10 driver
> to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
>
> virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
> virtio_net: probe of virtio0 failed with error -22
>
> To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
>
> It appears that adding ",disable-modern=on,disable-legacy=off" to the
> virtio-net -device makes it work again.
>
> I presume this should really just work out of the box. Any ideas why it
> isn't?
>
Hi,
This is strange. This commit changes virtio devices from legacy to virtio "transitional".
(your command line changes it to legacy)
Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
there is nothing new.
Michael, do you have any idea?
Thanks,
Marcel
> Cheers
> James
>
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
2017-03-20 15:21 ` Marcel Apfelbaum
@ 2017-03-20 15:43 ` Michael S. Tsirkin
-1 siblings, 0 replies; 12+ messages in thread
From: Michael S. Tsirkin @ 2017-03-20 15:43 UTC (permalink / raw)
To: Marcel Apfelbaum; +Cc: James Hogan, qemu-devel, Jason Wang, virtualization
On Mon, Mar 20, 2017 at 05:21:22PM +0200, Marcel Apfelbaum wrote:
> On 03/17/2017 11:57 PM, James Hogan wrote:
> > Hi,
> >
> > I've bisected the following failure of the virtio_net linux v4.10 driver
> > to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
> >
> > virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
> > virtio_net: probe of virtio0 failed with error -22
> >
> > To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
> >
> > It appears that adding ",disable-modern=on,disable-legacy=off" to the
> > virtio-net -device makes it work again.
> >
> > I presume this should really just work out of the box. Any ideas why it
> > isn't?
> >
>
> Hi,
>
>
> This is strange. This commit changes virtio devices from legacy to virtio "transitional".
> (your command line changes it to legacy)
> Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
> there is nothing new.
>
> Michael, do you have any idea?
>
> Thanks,
> Marcel
My guess would be firmware mishandling 64 bit BARs - we saw such
a case on sparc previously. As a result you are probably reading
all zeroes from features register or something like that.
Marcel, could you send a patch making the bar 32 bit?
If that helps we know what the issue is.
> > Cheers
> > James
> >
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-20 15:43 ` Michael S. Tsirkin
0 siblings, 0 replies; 12+ messages in thread
From: Michael S. Tsirkin @ 2017-03-20 15:43 UTC (permalink / raw)
To: Marcel Apfelbaum; +Cc: James Hogan, qemu-devel, virtualization
On Mon, Mar 20, 2017 at 05:21:22PM +0200, Marcel Apfelbaum wrote:
> On 03/17/2017 11:57 PM, James Hogan wrote:
> > Hi,
> >
> > I've bisected the following failure of the virtio_net linux v4.10 driver
> > to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
> >
> > virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
> > virtio_net: probe of virtio0 failed with error -22
> >
> > To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
> >
> > It appears that adding ",disable-modern=on,disable-legacy=off" to the
> > virtio-net -device makes it work again.
> >
> > I presume this should really just work out of the box. Any ideas why it
> > isn't?
> >
>
> Hi,
>
>
> This is strange. This commit changes virtio devices from legacy to virtio "transitional".
> (your command line changes it to legacy)
> Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
> there is nothing new.
>
> Michael, do you have any idea?
>
> Thanks,
> Marcel
My guess would be firmware mishandling 64 bit BARs - we saw such
a case on sparc previously. As a result you are probably reading
all zeroes from features register or something like that.
Marcel, could you send a patch making the bar 32 bit?
If that helps we know what the issue is.
> > Cheers
> > James
> >
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
2017-03-20 15:43 ` Michael S. Tsirkin
@ 2017-03-20 16:02 ` Marcel Apfelbaum
-1 siblings, 0 replies; 12+ messages in thread
From: Marcel Apfelbaum @ 2017-03-20 16:02 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: James Hogan, qemu-devel, Jason Wang, virtualization
On 03/20/2017 05:43 PM, Michael S. Tsirkin wrote:
> On Mon, Mar 20, 2017 at 05:21:22PM +0200, Marcel Apfelbaum wrote:
>> On 03/17/2017 11:57 PM, James Hogan wrote:
>>> Hi,
>>>
>>> I've bisected the following failure of the virtio_net linux v4.10 driver
>>> to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
>>>
>>> virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
>>> virtio_net: probe of virtio0 failed with error -22
>>>
>>> To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
>>>
>>> It appears that adding ",disable-modern=on,disable-legacy=off" to the
>>> virtio-net -device makes it work again.
>>>
>>> I presume this should really just work out of the box. Any ideas why it
>>> isn't?
>>>
>>
>> Hi,
>>
>>
>> This is strange. This commit changes virtio devices from legacy to virtio "transitional".
>> (your command line changes it to legacy)
>> Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
>> there is nothing new.
>>
>> Michael, do you have any idea?
>>
>> Thanks,
>> Marcel
>
> My guess would be firmware mishandling 64 bit BARs - we saw such
> a case on sparc previously. As a result you are probably reading
> all zeroes from features register or something like that.
> Marcel, could you send a patch making the bar 32 bit?
> If that helps we know what the issue is.
>
Sure,
Thanks,
Marcel
>>> Cheers
>>> James
>>>
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-20 16:02 ` Marcel Apfelbaum
0 siblings, 0 replies; 12+ messages in thread
From: Marcel Apfelbaum @ 2017-03-20 16:02 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: James Hogan, qemu-devel, virtualization
On 03/20/2017 05:43 PM, Michael S. Tsirkin wrote:
> On Mon, Mar 20, 2017 at 05:21:22PM +0200, Marcel Apfelbaum wrote:
>> On 03/17/2017 11:57 PM, James Hogan wrote:
>>> Hi,
>>>
>>> I've bisected the following failure of the virtio_net linux v4.10 driver
>>> to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
>>>
>>> virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
>>> virtio_net: probe of virtio0 failed with error -22
>>>
>>> To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
>>>
>>> It appears that adding ",disable-modern=on,disable-legacy=off" to the
>>> virtio-net -device makes it work again.
>>>
>>> I presume this should really just work out of the box. Any ideas why it
>>> isn't?
>>>
>>
>> Hi,
>>
>>
>> This is strange. This commit changes virtio devices from legacy to virtio "transitional".
>> (your command line changes it to legacy)
>> Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
>> there is nothing new.
>>
>> Michael, do you have any idea?
>>
>> Thanks,
>> Marcel
>
> My guess would be firmware mishandling 64 bit BARs - we saw such
> a case on sparc previously. As a result you are probably reading
> all zeroes from features register or something like that.
> Marcel, could you send a patch making the bar 32 bit?
> If that helps we know what the issue is.
>
Sure,
Thanks,
Marcel
>>> Cheers
>>> James
>>>
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
2017-03-20 15:43 ` Michael S. Tsirkin
@ 2017-03-21 14:16 ` Marcel Apfelbaum
-1 siblings, 0 replies; 12+ messages in thread
From: Marcel Apfelbaum @ 2017-03-21 14:16 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: James Hogan, qemu-devel, Jason Wang, virtualization
On 03/20/2017 05:43 PM, Michael S. Tsirkin wrote:
> On Mon, Mar 20, 2017 at 05:21:22PM +0200, Marcel Apfelbaum wrote:
>> On 03/17/2017 11:57 PM, James Hogan wrote:
>>> Hi,
>>>
>>> I've bisected the following failure of the virtio_net linux v4.10 driver
>>> to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
>>>
>>> virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
>>> virtio_net: probe of virtio0 failed with error -22
>>>
>>> To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
>>>
>>> It appears that adding ",disable-modern=on,disable-legacy=off" to the
>>> virtio-net -device makes it work again.
>>>
>>> I presume this should really just work out of the box. Any ideas why it
>>> isn't?
>>>
>>
>> Hi,
>>
>>
>> This is strange. This commit changes virtio devices from legacy to virtio "transitional".
>> (your command line changes it to legacy)
>> Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
>> there is nothing new.
>>
>> Michael, do you have any idea?
>>
>> Thanks,
>> Marcel
>
> My guess would be firmware mishandling 64 bit BARs - we saw such
> a case on sparc previously. As a result you are probably reading
> all zeroes from features register or something like that.
> Marcel, could you send a patch making the bar 32 bit?
> If that helps we know what the issue is.
>
Hi James,
Can you please check if the below patch fixes the problem?
Please note it is not a solution.
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index f9b7244..5b4d429 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1671,9 +1671,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
}
pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
- PCI_BASE_ADDRESS_SPACE_MEMORY |
- PCI_BASE_ADDRESS_MEM_PREFETCH |
- PCI_BASE_ADDRESS_MEM_TYPE_64,
+ PCI_BASE_ADDRESS_SPACE_MEMORY,
&proxy->modern_bar);
proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
Thanks,
Marcel
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-21 14:16 ` Marcel Apfelbaum
0 siblings, 0 replies; 12+ messages in thread
From: Marcel Apfelbaum @ 2017-03-21 14:16 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: James Hogan, qemu-devel, virtualization
On 03/20/2017 05:43 PM, Michael S. Tsirkin wrote:
> On Mon, Mar 20, 2017 at 05:21:22PM +0200, Marcel Apfelbaum wrote:
>> On 03/17/2017 11:57 PM, James Hogan wrote:
>>> Hi,
>>>
>>> I've bisected the following failure of the virtio_net linux v4.10 driver
>>> to probe in QEMU v2.9.0-rc1 emulating a MIPS Malta machine:
>>>
>>> virtio_net virtio0: virtio: device uses modern interface but does not have VIRTIO_F_VERSION_1
>>> virtio_net: probe of virtio0 failed with error -22
>>>
>>> To QEMU commit 9a4c0e220d8a ("hw/virtio-pci: fix virtio behaviour").
>>>
>>> It appears that adding ",disable-modern=on,disable-legacy=off" to the
>>> virtio-net -device makes it work again.
>>>
>>> I presume this should really just work out of the box. Any ideas why it
>>> isn't?
>>>
>>
>> Hi,
>>
>>
>> This is strange. This commit changes virtio devices from legacy to virtio "transitional".
>> (your command line changes it to legacy)
>> Linux 4.10 supports virtio modern/transitional (as far as I know) and on QEMU side
>> there is nothing new.
>>
>> Michael, do you have any idea?
>>
>> Thanks,
>> Marcel
>
> My guess would be firmware mishandling 64 bit BARs - we saw such
> a case on sparc previously. As a result you are probably reading
> all zeroes from features register or something like that.
> Marcel, could you send a patch making the bar 32 bit?
> If that helps we know what the issue is.
>
Hi James,
Can you please check if the below patch fixes the problem?
Please note it is not a solution.
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index f9b7244..5b4d429 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1671,9 +1671,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
}
pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
- PCI_BASE_ADDRESS_SPACE_MEMORY |
- PCI_BASE_ADDRESS_MEM_PREFETCH |
- PCI_BASE_ADDRESS_MEM_TYPE_64,
+ PCI_BASE_ADDRESS_SPACE_MEMORY,
&proxy->modern_bar);
proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
Thanks,
Marcel
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
2017-03-21 14:16 ` Marcel Apfelbaum
@ 2017-03-27 18:45 ` James Hogan
-1 siblings, 0 replies; 12+ messages in thread
From: James Hogan @ 2017-03-27 18:45 UTC (permalink / raw)
To: Marcel Apfelbaum
Cc: Michael S. Tsirkin, qemu-devel, Jason Wang, virtualization
[-- Attachment #1: Type: text/plain, Size: 1023 bytes --]
Hi Marcel,
On Tue, Mar 21, 2017 at 04:16:58PM +0200, Marcel Apfelbaum wrote:
> Can you please check if the below patch fixes the problem?
> Please note it is not a solution.
>
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index f9b7244..5b4d429 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1671,9 +1671,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
> }
>
> pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
> - PCI_BASE_ADDRESS_SPACE_MEMORY |
> - PCI_BASE_ADDRESS_MEM_PREFETCH |
> - PCI_BASE_ADDRESS_MEM_TYPE_64,
> + PCI_BASE_ADDRESS_SPACE_MEMORY,
> &proxy->modern_bar);
>
> proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
Sorry for the delay trying this, I was away last week.
No, it doesn't seem to make any difference.
Thanks
James
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^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour'
@ 2017-03-27 18:45 ` James Hogan
0 siblings, 0 replies; 12+ messages in thread
From: James Hogan @ 2017-03-27 18:45 UTC (permalink / raw)
To: Marcel Apfelbaum; +Cc: virtualization, qemu-devel, Michael S. Tsirkin
[-- Attachment #1.1: Type: text/plain, Size: 1023 bytes --]
Hi Marcel,
On Tue, Mar 21, 2017 at 04:16:58PM +0200, Marcel Apfelbaum wrote:
> Can you please check if the below patch fixes the problem?
> Please note it is not a solution.
>
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index f9b7244..5b4d429 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1671,9 +1671,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
> }
>
> pci_register_bar(&proxy->pci_dev, proxy->modern_mem_bar_idx,
> - PCI_BASE_ADDRESS_SPACE_MEMORY |
> - PCI_BASE_ADDRESS_MEM_PREFETCH |
> - PCI_BASE_ADDRESS_MEM_TYPE_64,
> + PCI_BASE_ADDRESS_SPACE_MEMORY,
> &proxy->modern_bar);
>
> proxy->config_cap = virtio_pci_add_mem_cap(proxy, &cfg.cap);
Sorry for the delay trying this, I was away last week.
No, it doesn't seem to make any difference.
Thanks
James
[-- Attachment #1.2: Digital signature --]
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_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2017-03-27 18:45 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-03-17 21:57 [Qemu-devel] [BUG] virtio-net linux driver fails to probe on MIPS Malta since 'hw/virtio-pci: fix virtio behaviour' James Hogan
2017-03-17 21:57 ` James Hogan
2017-03-20 15:21 ` [Qemu-devel] " Marcel Apfelbaum
2017-03-20 15:21 ` Marcel Apfelbaum
2017-03-20 15:43 ` [Qemu-devel] " Michael S. Tsirkin
2017-03-20 15:43 ` Michael S. Tsirkin
2017-03-20 16:02 ` [Qemu-devel] " Marcel Apfelbaum
2017-03-20 16:02 ` Marcel Apfelbaum
2017-03-21 14:16 ` [Qemu-devel] " Marcel Apfelbaum
2017-03-21 14:16 ` Marcel Apfelbaum
2017-03-27 18:45 ` [Qemu-devel] " James Hogan
2017-03-27 18:45 ` James Hogan
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