Output error message when user provides the invalid machine type on the command line. This also saves time to find what issue is when you upgrade from one version of qemu to another version that doesn't support required machine type any longer.
The patch is checked using ./scripts/checkpatch.pl script and also is_help_option() function is being used. Michal Signed-off-by: Michal Novotny <minov...@redhat.com> --- vl.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/vl.c b/vl.c index 25b8f2f..563ae67 100644 --- a/vl.c +++ b/vl.c @@ -2671,6 +2671,11 @@ static QEMUMachine *machine_parse(const char *name) if (machine) { return machine; } + + if (name && !is_help_option(name)) { + printf("Error: Unsupported machine type '%s'\n", name); + } + printf("Supported machines are:\n"); for (m = first_machine; m != NULL; m = m->next) { if (m->alias) { -- 1.7.11.7