perf/x86: Fix USER/KERNEL tagging of samples

Several perf interrupt handlers (PEBS,IBS,BTS) re-write regs->ip but
do not update the segment registers. So use an regs->ip based test
instead of an regs->cs/regs->flags based test.

Reported-and-tested-by: Stephane Eranian <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index c4706cf9c011d8fd068d205ed0b669142c112400..6ef9d41b87f98ef374c8d2255a081d95ea9df227 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1863,7 +1863,7 @@ unsigned long perf_misc_flags(struct pt_regs *regs)
                else
                        misc |= PERF_RECORD_MISC_GUEST_KERNEL;
        } else {
-               if (user_mode(regs))
+               if (!kernel_ip(regs->ip))
                        misc |= PERF_RECORD_MISC_USER;
                else
                        misc |= PERF_RECORD_MISC_KERNEL;