perf report/top: Add 'k' hotkey to zoom directly into the kernel map

As a convenience, equivalent to pressing Enter in a line with a kernel
symbol and then selecting "Zoom" into the kernel DSO.

Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-vbnlnrpyfvz9deqoobtc3dz7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 8aba1ae..6dfdd8d 100644 (file)
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -18,7 +18,9 @@
 #include "../../util/evlist.h"
 #include "../../util/header.h"
 #include "../../util/hist.h"
+#include "../../util/machine.h"
 #include "../../util/map.h"
+#include "../../util/maps.h"
 #include "../../util/symbol.h"
 #include "../../util/map_symbol.h"
 #include "../../util/branch.h"
@@ -2566,7 +2568,7 @@ add_dso_opt(struct hist_browser *browser, struct popup_action *act,
        if (!hists__has(browser->hists, dso) || map == NULL)
                return 0;
 
-       if (asprintf(optstr, "Zoom %s %s DSO",
+       if (asprintf(optstr, "Zoom %s %s DSO (use the 'k' hotkey to zoom directly into the kernel)",
                     browser->hists->dso_filter ? "out of" : "into",
                     __map__is_kernel(map) ? "the Kernel" : map->dso->short_name) < 0)
                return 0;
@@ -2936,6 +2938,7 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
        "E             Expand all callchains\n"                         \
        "F             Toggle percentage of filtered entries\n"         \
        "H             Display column headers\n"                        \
+       "k             Zoom into the kernel map\n"                      \
        "L             Change percent limit\n"                          \
        "m             Display context menu\n"                          \
        "S             Zoom into current Processor Socket\n"            \
@@ -3033,6 +3036,10 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
                        actions->ms.map = map;
                        do_zoom_dso(browser, actions);
                        continue;
+               case 'k':
+                       if (browser->selection != NULL)
+                               hists_browser__zoom_map(browser, browser->selection->maps->machine->vmlinux_map);
+                       continue;
                case 'V':
                        verbose = (verbose + 1) % 4;
                        browser->show_dso = verbose > 0;