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Re: [Qemu-devel] [PATCH v4 11/15] target-s390x: New QMP command query-cp

From: Eduardo Habkost
Subject: Re: [Qemu-devel] [PATCH v4 11/15] target-s390x: New QMP command query-cpu-model
Date: Mon, 30 Mar 2015 17:17:21 -0300
User-agent: Mutt/1.5.23 (2014-03-12)

On Mon, Mar 30, 2015 at 04:28:24PM +0200, Michael Mueller wrote:
> This patch implements a new QMP request named 'query-cpu-model'.
> It returns the cpu model of cpu 0 and its backing accelerator.
> request:
>   {"execute" : "query-cpu-model" }
> answer:
>   {"return" : {"name": "2827-ga2", "accel": "kvm" }}

If you are returning information about an existing CPU, why not just
extend the output of "query-cpus"?

(Existing qmp_query_cpus() calls cpu_synchronize_state(), which may be
undesired. But in this case we could add an optional parameter to
disable the return of data that requires stopping the VCPU).

> Alias names are resolved to their respective machine type and GA names
> already during cpu instantiation. Thus, also a cpu model like 'host'
> which is implemented as alias will return its normalized cpu model name.
> Furthermore the patch implements the following function:
> - s390_cpu_models_used(), returns true if S390 cpu models are in use
> Signed-off-by: Michael Mueller <address@hidden>


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