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vl: Print error when using incorrect backend for debugcon

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When using an incorrect backend for the debugcon, QEMU exits silently
without any error indication, which is confusing.
Add a message that the character backend is invalid.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20181011171254.32428-1-philmd@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2018-10-11 19:12:54 +02:00 committed by Markus Armbruster
parent 4c9ab1e693
commit d7ecf71238
1 changed files with 1 additions and 0 deletions
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vl.c
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@ -2466,6 +2466,7 @@ static int debugcon_parse(const char *devname)
QemuOpts *opts; QemuOpts *opts;
if (!qemu_chr_new_mux_mon("debugcon", devname)) { if (!qemu_chr_new_mux_mon("debugcon", devname)) {
error_report("invalid character backend '%s'", devname);
exit(1); exit(1);
} }
opts = qemu_opts_create(qemu_find_opts("device"), "debugcon", 1, NULL); opts = qemu_opts_create(qemu_find_opts("device"), "debugcon", 1, NULL);