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Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr
From: |
Shannon Zhao |
Subject: |
Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr |
Date: |
Thu, 28 May 2015 08:53:09 +0800 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 2015/5/28 2:03, Pavel Fedin wrote:
> Hello!
>
>> I think encoding should be CPU type specific i.e. not defined by what
>> GIC can support and once we add CPU type with 8 cores, it would provide
>> it's own version of mpidr_read since it would be defined by spec
>> how to encode aff0.
>
> I have redone this thing from scratch:
> https://lists.gnu.org/archive/html/qemu-devel/2015-05/msg04495.html
> My implementation does exactly this. It simply introduces CPU-specific MPIDR
> value which
> CPUs can set as they wish.
IIUC, your implementation also uses 8 cpus per cluster which is not
consistent with CPU spec.
> Also this is used by KVM because KVM has its own ideas about
> how CPUs are clustered.
> I posted that without RFC, because i think it's ready for application, but my
> message
> seems to have been lost. Looks like i forgot Cc to the maintainer. My current
> vGICv3
> work-in-progress is based on this.
> If Shlomo does not respond until friday, i think i'll post a new vGICv3
> series based on
> master.
>
I guess we should give people time to do the respin or other things.
> Kind regards,
> Pavel Fedin
> Expert Engineer
> Samsung Electronics Research center Russia
>
>
>
--
Shannon
- [Qemu-devel] [PATCH RFC V2 0/4] Implement GIC-500 from GICv3 family for arm64, shlomopongratz, 2015/05/06
- Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr, Igor Mammedov, 2015/05/27
- Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr, Shlomo Pongratz, 2015/05/28
- Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr, Igor Mammedov, 2015/05/28
- Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr, Shlomo Pongratz, 2015/05/28
- Re: [Qemu-devel] [PATCH RFC V2 1/4] Use Aff1 with mpidr, Pavel Fedin, 2015/05/28
[Qemu-devel] [PATCH RFC V2 3/4] GICv3 support, shlomopongratz, 2015/05/06
[Qemu-devel] [PATCH RFC V2 2/4] Implment GIC-500, shlomopongratz, 2015/05/06