qemu-log: Abstract out "print usage message about valid log categories"

Abstract out the "print a human readable list of all the
valid log categories" functionality which is currently duplicated
in three separate places. (We leave the monitor.c help_cmd()
implementation as-is since it wants to send the message to
the monitor and add its own information.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/qemu-log.c b/qemu-log.c
index 9a7e5675a1..786d335893 100644
--- a/qemu-log.c
+++ b/qemu-log.c
@@ -170,3 +170,12 @@ int cpu_str_to_log_mask(const char *str)
     }
     return mask;
 }
+
+void qemu_print_log_usage(FILE *f)
+{
+    const CPULogItem *item;
+    fprintf(f, "Log items (comma separated):\n");
+    for (item = cpu_log_items; item->mask != 0; item++) {
+        fprintf(f, "%-10s %s\n", item->name, item->help);
+    }
+}