[PATCH 1/3] perf, tool: Force guest machine definition option

[Jiri Olsa <jolsa@redhat.com>]

Running 'perf kvm record' without any of following options:
  --guestmount
  --guestvmlinux
  --guestkallsyms
  --guestmodules

is causing the guest machine to be ommited from the data file,
and all guest samples are counted in nr_unprocessable_samples.

This patch makes sure the 'perf kvm record' command is not
let through until one of the above option is specified.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
 tools/perf/builtin-kvm.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 9fc6e0f..559d468 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -53,6 +53,16 @@ static int __cmd_record(int argc, const char **argv)
 	int rec_argc, i = 0, j;
 	const char **rec_argv;
 
+	if (perf_guest &&
+	    !(symbol_conf.guestmount ||
+	      symbol_conf.default_guest_vmlinux_name ||
+	      symbol_conf.default_guest_modules ||
+	      symbol_conf.default_guest_kallsyms)) {
+		ui__warning("You need to define guest with one of guestmount|"
+			    "guestvmlinux|guestkallsyms|guestmodules\n");
+		return -EINVAL;
+	}
+
 	rec_argc = argc + 2;
 	rec_argv = calloc(rec_argc + 1, sizeof(char *));
 	rec_argv[i++] = strdup("record");
-- 
1.7.1