perf_event: Eliminate permission error for check_exclude_guest() with…

… paranoid kernel

On systems with perf_event_paranoid>=2, userspace calls to
perf_event_open() must set attr.exclude_kernel=1. Set exclude_kernel=1
in check_exclude_guest() to allow the function to execute successfully
on systems with perf_event_paranoid>=2;

src/components/perf_event/perf_event.c

@@ -285,6 +285,7 @@ check_exclude_guest( void )
 	/* First check that we can open a plain instructions event */
 	memset(&attr, 0 , sizeof(attr));
 	attr.config = PERF_COUNT_HW_INSTRUCTIONS;
+	attr.exclude_kernel=1;
 
 	ev_fd = sys_perf_event_open( &attr, 0, -1, -1, 0 );
 	if ( ev_fd == -1 ) {
@@ -296,6 +297,7 @@ check_exclude_guest( void )
 	/* Now try again with excude_guest */
 	memset(&attr, 0 , sizeof(attr));
 	attr.config = PERF_COUNT_HW_INSTRUCTIONS;
+	attr.exclude_kernel=1;
 	attr.exclude_guest=1;
 
 	ev_fd = sys_perf_event_open( &attr, 0, -1, -1, 0 );