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Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is
From: |
Christian Borntraeger |
Subject: |
Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available |
Date: |
Mon, 25 Sep 2017 13:47:52 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 |
On 09/25/2017 01:45 PM, Cornelia Huck wrote:
> On Mon, 25 Sep 2017 12:12:49 +0200
> Christian Borntraeger <address@hidden> wrote:
>
>> On 09/25/2017 12:07 PM, Cornelia Huck wrote:
>>> On Fri, 22 Sep 2017 16:27:00 +0200
>>> Halil Pasic <address@hidden> wrote:
>>>
>>>> One thing I would find very helpful is what do we expect to work and not
>>>> work for which version. Kind of a matrix. For instance should vfio pci
>>>> work for versions prior 2.11. I think in the not so distant past we
>>>> changed how SIC works (so it complains when we don't have ais).
>>>
>>> A matrix sounds like a good idea.
>>
>> I think we do not even need a matrix, a minimum level will suffice because...
>>>
>>> I don't think we really ever had a setup that worked out of the box
>>
>> exactly: ...it never worked until 2.10 and we do not have libvirt support
>> yet.
>> Now with the fix 2.10 will also not work, so I think its fair to say
>>
>> PCI passthrough via VFIO will be supported for
>> - KVM: host kernel >= 4.13
>> - TCG: TBD
>> - QEMU >= 2.11
>> - libvirt TBD
>
> Make that zpci-per-se, no?
>
> with KVM: host kernel >= 4.13 && QEMU >= 2.11
> with TCG: tbd, I don't think anybody has time to wire this up for 2.11
>
> Apropos libvirt: How will it determine whether zpci should be
> supported? There are some old QEMU + KVM combinations out there that
> will have a phb (but not be usable by stock Linux guests as the feature
> bits are missing). Version fence? Check for cpu feature support?
I think for multibus or something like that Boris wanted to check for a version
anyway. So maybe 2.11 (now that 2.10 is broken regarding ais) as a minimum QEMU
level would make sense.
- [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, (continued)
- [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Christian Borntraeger, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Pierre Morel, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Christian Borntraeger, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Cornelia Huck, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Pierre Morel, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Christian Borntraeger, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Halil Pasic, 2017/09/22
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Cornelia Huck, 2017/09/25
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Christian Borntraeger, 2017/09/25
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Cornelia Huck, 2017/09/25
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available,
Christian Borntraeger <=
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Yi Min Zhao, 2017/09/26
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Boris Fiuczynski, 2017/09/26
- Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, Pierre Morel, 2017/09/22
Re: [Qemu-devel] [PATCH/RFC 2/3] s390x/ais: enable ais when migration is available, David Hildenbrand, 2017/09/26
[Qemu-devel] [PATCH/RFC 1/3] s390x/ais: disable ais facility as it is broken, Christian Borntraeger, 2017/09/22
[Qemu-devel] [PATCH/RFC 3/3] s390x/ais: disable ais for compat machines, Christian Borntraeger, 2017/09/22