Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (311 commits)
  perf tools: Add mode to build without newt support
  perf symbols: symbol inconsistency message should be done only at verbose=1
  perf tui: Add explicit -lslang option
  perf options: Type check all the remaining OPT_ variants
  perf options: Type check OPT_BOOLEAN and fix the offenders
  perf options: Check v type in OPT_U?INTEGER
  perf options: Introduce OPT_UINTEGER
  perf tui: Add workaround for slang < 2.1.4
  perf record: Fix bug mismatch with -c option definition
  perf options: Introduce OPT_U64
  perf tui: Add help window to show key associations
  perf tui: Make <- exit menus too
  perf newt: Add single key shortcuts for zoom into DSO and threads
  perf newt: Exit browser unconditionally when CTRL+C, q or Q is pressed
  perf newt: Fix the 'A'/'a' shortcut for annotate
  perf newt: Make <- exit the ui_browser
  x86, perf: P4 PMU - fix counters management logic
  perf newt: Make <- zoom out filters
  perf report: Report number of events, not samples
  perf hist: Clarify events_stats fields usage
  ...

Fix up trivial conflicts in kernel/fork.c and tools/perf/builtin-record.c

1 files changed, 50 insertions, 0 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c4f35b545c1d..dd9bc8fb81ab 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -40,6 +40,7 @@
 #include <linux/user-return-notifier.h>
 #include <linux/srcu.h>
 #include <linux/slab.h>
+#include <linux/perf_event.h>
 #include <trace/events/kvm.h>
 #undef TRACE_INCLUDE_FILE
 #define CREATE_TRACE_POINTS
@@ -3747,6 +3748,51 @@ static void kvm_timer_init(void)
         }
 }
 
+static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
+
+static int kvm_is_in_guest(void)
+{
+        return percpu_read(current_vcpu) != NULL;
+}
+
+static int kvm_is_user_mode(void)
+{
+        int user_mode = 3;
+
+        if (percpu_read(current_vcpu))
+                user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
+
+        return user_mode != 0;
+}
+
+static unsigned long kvm_get_guest_ip(void)
+{
+        unsigned long ip = 0;
+
+        if (percpu_read(current_vcpu))
+                ip = kvm_rip_read(percpu_read(current_vcpu));
+
+        return ip;
+}
+
+static struct perf_guest_info_callbacks kvm_guest_cbs = {
+        .is_in_guest            = kvm_is_in_guest,
+        .is_user_mode           = kvm_is_user_mode,
+        .get_guest_ip           = kvm_get_guest_ip,
+};
+
+void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
+{
+        percpu_write(current_vcpu, vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
+
+void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
+{
+        percpu_write(current_vcpu, NULL);
+}
+EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
+
 int kvm_arch_init(void *opaque)
 {
         int r;
@@ -3783,6 +3829,8 @@ int kvm_arch_init(void *opaque)
 
         kvm_timer_init();
 
+        perf_register_guest_info_callbacks(&kvm_guest_cbs);
+
         return 0;
 
 out:
@@ -3791,6 +3839,8 @@ out:
 
 void kvm_arch_exit(void)
 {
+        perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
+
         if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
                 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
                                             CPUFREQ_TRANSITION_NOTIFIER);