Re: [PATCH] Disallow colons in the parameter of "-accel"

[Paolo Bonzini <pbonzini@redhat.com>]

On 23/09/19 14:17, Thomas Huth wrote:
> Everybody who used something like "-machine accel=kvm:tcg" in the past
> might be tempted to specify a similar list with the -accel parameter,
> too, for example "-accel kvm:tcg". However, this is not how this
> options is thought to be used, since each "-accel" should only take care
> of one specific accelerator.
> 
> In the long run, we really should rework the "-accel" code completely,
> so that it does not set "-machine accel=..." anymore internally, but
> is completely independent from "-machine". For the short run, let's
> make sure that users cannot use "-accel xyz:tcg", so that we avoid
> that we have to deal with such cases in the wild later.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  vl.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/vl.c b/vl.c
> index 630f5c5e9c..68f47a9c25 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -3554,6 +3554,11 @@ int main(int argc, char **argv, char **envp)
>                      g_slist_free(accel_list);
>                      exit(0);
>                  }
> +                if (optarg && strchr(optarg, ':')) {
> +                    error_report("Don't use ':' with -accel, "
> +                                 "use -M accel=... in this case instead");

s/in this case/for now/ or something like that?

Thanks,

Paolo

> +                    exit(1);
> +                }
>                  opts = qemu_opts_create(qemu_find_opts("machine"), NULL,
>                                          false, &error_abort);
>                  qemu_opt_set(opts, "accel", optarg, &error_abort);
>