Re: [Qemu-devel] [PATCH V9 1/5] Support for TPM command line options

[Michael S. Tsirkin]

On Mon, Sep 26, 2011 at 12:35:10PM -0400, Stefan Berger wrote:
> +void tpm_display_backend_drivers(FILE *out)
> +{
> +    int i;
> +
> +    fprintf(out, "Supported TPM types (choose only one):\n");
> +
> +    for (i = 0; bes[i] != NULL; i++) {
> +        fprintf(out, "%12s   %s",
> +                bes[i]->id, bes[i]->desc());
> +        fprintf(out, "\n");
> +    }
> +    fprintf(out, "\n");
> +}

This dumps to stderr and so for qmp users it won't be correctly ordered.
I'd suggest simply using error_report. This means '?' goes to stderr,
not stdout, but that is consistent with e.g. -device '?'.