Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

[firefly-linux-kernel-4.4.55.git] / arch / x86 / kernel / cpu / perf_event_amd.c

diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index 0397b23be8e9006c0171bb092b2e5a8f7249e709..67250a52430bfd9a3d0cf89fa38408d0e8cd793a 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -1,4 +1,5 @@
 #include <linux/perf_event.h>
+#include <linux/export.h>
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/slab.h>
@@ -357,7 +358,9 @@ static void amd_pmu_cpu_starting(int cpu)
        struct amd_nb *nb;
        int i, nb_id;
 
-       if (boot_cpu_data.x86_max_cores < 2)
+       cpuc->perf_ctr_virt_mask = AMD_PERFMON_EVENTSEL_HOSTONLY;
+
+       if (boot_cpu_data.x86_max_cores < 2 || boot_cpu_data.x86 == 0x15)
                return;
 
        nb_id = amd_get_nb_id(cpu);
@@ -587,9 +590,9 @@ static __initconst const struct x86_pmu amd_pmu_f15h = {
        .put_event_constraints  = amd_put_event_constraints,
 
        .cpu_prepare            = amd_pmu_cpu_prepare,
-       .cpu_starting           = amd_pmu_cpu_starting,
        .cpu_dead               = amd_pmu_cpu_dead,
 #endif
+       .cpu_starting           = amd_pmu_cpu_starting,
 };
 
 __init int amd_pmu_init(void)
@@ -621,3 +624,33 @@ __init int amd_pmu_init(void)
 
        return 0;
 }
+
+void amd_pmu_enable_virt(void)
+{
+       struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+       cpuc->perf_ctr_virt_mask = 0;
+
+       /* Reload all events */
+       x86_pmu_disable_all();
+       x86_pmu_enable_all(0);
+}
+EXPORT_SYMBOL_GPL(amd_pmu_enable_virt);
+
+void amd_pmu_disable_virt(void)
+{
+       struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+       /*
+        * We only mask out the Host-only bit so that host-only counting works
+        * when SVM is disabled. If someone sets up a guest-only counter when
+        * SVM is disabled the Guest-only bits still gets set and the counter
+        * will not count anything.
+        */
+       cpuc->perf_ctr_virt_mask = AMD_PERFMON_EVENTSEL_HOSTONLY;
+
+       /* Reload all events */
+       x86_pmu_disable_all();
+       x86_pmu_enable_all(0);
+}
+EXPORT_SYMBOL_GPL(amd_pmu_disable_virt);