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Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters |
Date: |
Mon, 3 Dec 2018 11:23:56 +0000 |
On Mon, 3 Dec 2018 at 11:21, Luc Michel <address@hidden> wrote:
>
> On 11/30/18 5:52 PM, Peter Maydell wrote:
> > Luc: what are the requirements on boards using CPU cluster
> > objects? I assume these are both OK:
> > * does not use cluster objects at all
> > (the gdbstub puts all the CPUs in one process?)
> Yes, when no clusters are found, a process with PID 1 is created and
> used for all CPUs.
> > * all CPUs created are in some CPU cluster
> > (the gdbstub uses one process per CPU cluster)
> > but what about
> > * some CPUs are created in a CPU cluster, but some
> > are "loose", not in any cluster at all> ?
> > Is that just invalid, or do the "loose" CPUs end up in
> > a default cluster (gdbstub process), or do they get
> > one cluster each?
> Currently this is valid and the "loose" CPUs end up in the first
> available process (which will be PID 1 if we are in your first case,
> i.e. no clusters in the machine).
So if there are some defined clusters 1 and 2, and some
loose CPUs, the clusters get PID 1 and PID 2, and the
loose CPUs end up in PID 3? That seems reasonable.
thanks
-- PMM
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Luc Michel, 2018/12/03
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters,
Peter Maydell <=
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Luc Michel, 2018/12/03
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Eduardo Habkost, 2018/12/04
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Peter Maydell, 2018/12/04
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Eduardo Habkost, 2018/12/04
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Peter Maydell, 2018/12/04
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Eduardo Habkost, 2018/12/04
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Luc Michel, 2018/12/05
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Eduardo Habkost, 2018/12/05
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Luc Michel, 2018/12/05
- Re: [Qemu-devel] [PATCH v7 01/16] hw/cpu: introduce CPU clusters, Luc Michel, 2018/12/05