perf: Enhance perf to allow for guest statistic collection from host

Below patch introduces perf_guest_info_callbacks and related
register/unregister functions. Add more PERF_RECORD_MISC_XXX bits
meaning guest kernel and guest user space.

Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 4 insertions, 11 deletions

diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index f6d43dbfd8e..254883d0c7e 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -135,17 +135,10 @@ extern void perf_events_lapic_init(void);
  */
 #define PERF_EFLAGS_EXACT       (1UL << 3)
 
-#define perf_misc_flags(regs)                           \
-({      int misc = 0;                                   \
-        if (user_mode(regs))                            \
-                misc |= PERF_RECORD_MISC_USER;          \
-        else                                            \
-                misc |= PERF_RECORD_MISC_KERNEL;        \
-        if (regs->flags & PERF_EFLAGS_EXACT)            \
-                misc |= PERF_RECORD_MISC_EXACT;         \
-        misc; })
-
-#define perf_instruction_pointer(regs)  ((regs)->ip)
+struct pt_regs;
+extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
+extern unsigned long perf_misc_flags(struct pt_regs *regs);
+#define perf_misc_flags(regs)   perf_misc_flags(regs)
 
 #else
 static inline void init_hw_perf_events(void)            { }