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Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models |
Date: |
Fri, 20 Feb 2015 20:55:11 +0100 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 |
On 20.02.15 20:43, Michael Mueller wrote:
> On Fri, 20 Feb 2015 18:50:20 +0100
> Alexander Graf <address@hidden> wrote:
>
>>
>>
>>
>>> Am 20.02.2015 um 18:37 schrieb Michael Mueller <address@hidden>:
>>>
>>> On Fri, 20 Feb 2015 17:57:52 +0100
>>> Alexander Graf <address@hidden> wrote:
>>>
>>>> Because all CPUs we have in our list only expose 128 bits?
>>>
>>> Here a STFLE result on a EC12 GA2, already more than 128 bits... Is that
>>> model on the list?
>>
>> If that model has 3 elements, yes, the array should span 3.
>>
>> I hope it's in the list. Every model wecare about should be, no?
>>
>
> On my list? Yes!
>
>>>
>>> address@hidden s390xfac]$ ./s390xfac -b
>>> fac[0] = 0xfbfffffbfcfff840
>>> fac[1] = 0xffde000000000000
>>> fac[2] = 0x1800000000000000
>>>>
>>>>> I want to have this independent from a future machine of the z/Arch. The
>>>>> kernel stores the
>>>>> full facility set, KVM does and there is no good reason for QEMU not to
>>>>> do. If other
>>>>> accelerators decide to just implement 64 or 128 bits of facilities that's
>>>>> ok...
>>>>
>>>> So you want to support CPUs that are not part of the list?
>>>
>>> The architecture at least defines more than 2 or 3. Do you want me to limit
>>> it to an arbitrary
>>> size?. Only in QEMU or also in the KVM interface?
>>
>> Only internally in QEMU. The kvm interface should definitely be as big as
>> the spec allows!
>
> Right, now we're on the same page again. That can be taken in consideration.
> ... Although it's
> just and optimization. :-)
Yeah. You could also consider using the QEMU built-in bitmap type and
functions and just convert from there. That would give you native
support for bit values > 64.
Alex
- [Qemu-devel] [RFC PATCH v2 07/15] cpu-model/s390: Add cpu model alias definition routines, (continued)
- [Qemu-devel] [RFC PATCH v2 07/15] cpu-model/s390: Add cpu model alias definition routines, Michael Mueller, 2015/02/17
- [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Michael Mueller, 2015/02/17
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Alexander Graf, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Michael Mueller, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Alexander Graf, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Michael Mueller, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Alexander Graf, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Michael Mueller, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Alexander Graf, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Michael Mueller, 2015/02/20
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models,
Alexander Graf <=
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Christian Borntraeger, 2015/02/23
- Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Christian Borntraeger, 2015/02/23
Re: [Qemu-devel] [RFC PATCH v2 04/15] cpu-model/s390: Introduce S390 CPU models, Alexander Graf, 2015/02/20
[Qemu-devel] [RFC PATCH v2 11/15] cpu-model/s390: Add QMP command query-cpu-model, Michael Mueller, 2015/02/17
[Qemu-devel] [RFC PATCH v2 09/15] cpu-model/s390: Add KVM VM attribute interface routines, Michael Mueller, 2015/02/17