x86: PM_TRACE support

Signed-off-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/asm-x86_64/resume-trace.h b/include/asm-x86_64/resume-trace.h
new file mode 100644
index 000000000000..34bf998fdf62
--- /dev/null
+++ b/include/asm-x86_64/resume-trace.h
@@ -0,0 +1,13 @@
+#define TRACE_RESUME(user) do {                                 \
+        if (pm_trace_enabled) {                                 \
+                void *tracedata;                                \
+                asm volatile("movq $1f,%0\n"                    \
+                        ".section .tracedata,\"a\"\n"           \
+                        "1:\t.word %c1\n"                       \
+                        "\t.quad %c2\n"                         \
+                        ".previous"                             \
+                        :"=r" (tracedata)                       \
+                        : "i" (__LINE__), "i" (__FILE__));      \
+                generate_resume_trace(tracedata, user);         \
+        }                                                       \
+} while (0)