linux-kernel - [PATCH 3/5] perf, tools: Add support for guest/host-only profiling

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Message-ID: <1308317854-27398-4-git-send-email-joerg.roedel@amd.com>
Date:	Fri, 17 Jun 2011 15:37:32 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>,
	Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 3/5] perf, tools: Add support for guest/host-only profiling

To restrict a counter to either host or guest mode this
patch introduces two new event modifiers: G and H.
With G the counter is configured in guest-only mode and with
H in host-only mode.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 tools/perf/util/parse-events.c |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 41982c3..8bfb8de 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -728,8 +728,8 @@ static int
 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 {
 	const char *str = *strp;
-	int exclude = 0;
-	int eu = 0, ek = 0, eh = 0, precise = 0;
+	int exclude = 0, exclude_GH = 0;
+	int eu = 0, ek = 0, eh = 0, eH = 0, eG = 0, precise = 0;
 
 	if (!*str)
 		return 0;
@@ -753,6 +753,14 @@ parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 			if (!exclude)
 				exclude = eu = ek = eh = 1;
 			eh = 0;
+		} else if (*str == 'G') {
+			if (!exclude_GH)
+				exclude_GH = eG = eH = 1;
+			eG = 0;
+		} else if (*str == 'H') {
+			if (!exclude_GH)
+				exclude_GH = eG = eH = 1;
+			eH = 0;
 		} else if (*str == 'p') {
 			precise++;
 		} else
@@ -769,6 +777,8 @@ parse_event_modifier(const char **strp, struct perf_event_attr *attr)
 	attr->exclude_kernel = ek;
 	attr->exclude_hv     = eh;
 	attr->precise_ip     = precise;
+	attr->exclude_host   = eH;
+	attr->exclude_guest  = eG;
 
 	return 0;
 }
-- 
1.7.4.1


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