ARM: 9480/1: entry: expand comment in __switch_tografted

As per discussion between the developers in the mail thread
linked, expand the comment in __switch_to so that readers
of the code understand what is going on.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

1 files changed, 27 insertions, 0 deletions

diff --git a/tools/perf/util/sample-raw.c b/tools/perf/util/sample-raw.c
new file mode 100644
index 000000000..bcf442574
--- /dev/null
+++ b/tools/perf/util/sample-raw.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <string.h>
+#include <linux/string.h>
+#include "evlist.h"
+#include "env.h"
+#include "header.h"
+#include "sample-raw.h"
+#include "session.h"
+
+/*
+ * Check platform the perf data file was created on and perform platform
+ * specific interpretation.
+ */
+void evlist__init_trace_event_sample_raw(struct evlist *evlist, struct perf_env *env)
+{
+	const char *arch_pf = perf_env__arch(env);
+	const char *cpuid = perf_env__cpuid(env);
+
+	if (arch_pf && !strcmp("s390", arch_pf))
+		evlist->trace_event_sample_raw = evlist__s390_sample_raw;
+	else if (arch_pf && !strcmp("x86", arch_pf) &&
+		 cpuid && strstarts(cpuid, "AuthenticAMD") &&
+		 evlist__has_amd_ibs(evlist)) {
+		evlist->trace_event_sample_raw = evlist__amd_sample_raw;
+	}
+}