perf/x86/amd: Remove old-style NB counter support from perf_event_amd.c

Support for NB counters, MSRs 0xc0010240 ~ 0xc0010247, got
moved to perf_event_amd_uncore.c in the following commit:

  c43ca5091a37 perf/x86/amd: Add support for AMD NB and L2I "uncore" counters

AMD Family 10h NB events (events 0xe0 ~ 0xff, on MSRs 0xc001000 ~
0xc001007) will still continue to be handled by perf_event_amd.c

Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Jacob Shin <jacob.shin@amd.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Link: http://lkml.kernel.org/r/1366046483-1765-2-git-send-email-jacob.shin@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 5 insertions, 133 deletions

diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index dfdab42aed27..7e28d9467bb4 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -132,14 +132,11 @@ static u64 amd_pmu_event_map(int hw_event)
         return amd_perfmon_event_map[hw_event];
 }
 
-static struct event_constraint *amd_nb_event_constraint;
-
 /*
  * Previously calculated offsets
  */
 static unsigned int event_offsets[X86_PMC_IDX_MAX] __read_mostly;
 static unsigned int count_offsets[X86_PMC_IDX_MAX] __read_mostly;
-static unsigned int rdpmc_indexes[X86_PMC_IDX_MAX] __read_mostly;
 
 /*
  * Legacy CPUs:
@@ -147,14 +144,10 @@ static unsigned int rdpmc_indexes[X86_PMC_IDX_MAX] __read_mostly;
  *
  * CPUs with core performance counter extensions:
  *   6 counters starting at 0xc0010200 each offset by 2
- *
- * CPUs with north bridge performance counter extensions:
- *   4 additional counters starting at 0xc0010240 each offset by 2
- *   (indexed right above either one of the above core counters)
  */
 static inline int amd_pmu_addr_offset(int index, bool eventsel)
 {
-        int offset, first, base;
+        int offset;
 
         if (!index)
                 return index;
@@ -167,23 +160,7 @@ static inline int amd_pmu_addr_offset(int index, bool eventsel)
         if (offset)
                 return offset;
 
-        if (amd_nb_event_constraint &&
-            test_bit(index, amd_nb_event_constraint->idxmsk)) {
-                /*
-                 * calculate the offset of NB counters with respect to
-                 * base eventsel or perfctr
-                 */
-
-                first = find_first_bit(amd_nb_event_constraint->idxmsk,
-                                       X86_PMC_IDX_MAX);
-
-                if (eventsel)
-                        base = MSR_F15H_NB_PERF_CTL - x86_pmu.eventsel;
-                else
-                        base = MSR_F15H_NB_PERF_CTR - x86_pmu.perfctr;
-
-                offset = base + ((index - first) << 1);
-        } else if (!cpu_has_perfctr_core)
+        if (!cpu_has_perfctr_core)
                 offset = index;
         else
                 offset = index << 1;
@@ -196,36 +173,6 @@ static inline int amd_pmu_addr_offset(int index, bool eventsel)
         return offset;
 }
 
-static inline int amd_pmu_rdpmc_index(int index)
-{
-        int ret, first;
-
-        if (!index)
-                return index;
-
-        ret = rdpmc_indexes[index];
-
-        if (ret)
-                return ret;
-
-        if (amd_nb_event_constraint &&
-            test_bit(index, amd_nb_event_constraint->idxmsk)) {
-                /*
-                 * according to the mnual, ECX value of the NB counters is
-                 * the index of the NB counter (0, 1, 2 or 3) plus 6
-                 */
-
-                first = find_first_bit(amd_nb_event_constraint->idxmsk,
-                                       X86_PMC_IDX_MAX);
-                ret = index - first + 6;
-        } else
-                ret = index;
-
-        rdpmc_indexes[index] = ret;
-
-        return ret;
-}
-
 static int amd_core_hw_config(struct perf_event *event)
 {
         if (event->attr.exclude_host && event->attr.exclude_guest)
@@ -245,34 +192,6 @@ static int amd_core_hw_config(struct perf_event *event)
 }
 
 /*
- * NB counters do not support the following event select bits:
- *   Host/Guest only
- *   Counter mask
- *   Invert counter mask
- *   Edge detect
- *   OS/User mode
- */
-static int amd_nb_hw_config(struct perf_event *event)
-{
-        /* for NB, we only allow system wide counting mode */
-        if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
-                return -EINVAL;
-
-        if (event->attr.exclude_user || event->attr.exclude_kernel ||
-            event->attr.exclude_host || event->attr.exclude_guest)
-                return -EINVAL;
-
-        event->hw.config &= ~(ARCH_PERFMON_EVENTSEL_USR |
-                              ARCH_PERFMON_EVENTSEL_OS);
-
-        if (event->hw.config & ~(AMD64_RAW_EVENT_MASK_NB |
-                                 ARCH_PERFMON_EVENTSEL_INT))
-                return -EINVAL;
-
-        return 0;
-}
-
-/*
  * AMD64 events are detected based on their event codes.
  */
 static inline unsigned int amd_get_event_code(struct hw_perf_event *hwc)
@@ -285,11 +204,6 @@ static inline int amd_is_nb_event(struct hw_perf_event *hwc)
         return (hwc->config & 0xe0) == 0xe0;
 }
 
-static inline int amd_is_perfctr_nb_event(struct hw_perf_event *hwc)
-{
-        return amd_nb_event_constraint && amd_is_nb_event(hwc);
-}
-
 static inline int amd_has_nb(struct cpu_hw_events *cpuc)
 {
         struct amd_nb *nb = cpuc->amd_nb;
@@ -315,9 +229,6 @@ static int amd_pmu_hw_config(struct perf_event *event)
         if (event->attr.type == PERF_TYPE_RAW)
                 event->hw.config |= event->attr.config & AMD64_RAW_EVENT_MASK;
 
-        if (amd_is_perfctr_nb_event(&event->hw))
-                return amd_nb_hw_config(event);
-
         return amd_core_hw_config(event);
 }
 
@@ -341,19 +252,6 @@ static void __amd_put_nb_event_constraints(struct cpu_hw_events *cpuc,
         }
 }
 
-static void amd_nb_interrupt_hw_config(struct hw_perf_event *hwc)
-{
-        int core_id = cpu_data(smp_processor_id()).cpu_core_id;
-
-        /* deliver interrupts only to this core */
-        if (hwc->config & ARCH_PERFMON_EVENTSEL_INT) {
-                hwc->config |= AMD64_EVENTSEL_INT_CORE_ENABLE;
-                hwc->config &= ~AMD64_EVENTSEL_INT_CORE_SEL_MASK;
-                hwc->config |= (u64)(core_id) <<
-                        AMD64_EVENTSEL_INT_CORE_SEL_SHIFT;
-        }
-}
-
  /*
   * AMD64 NorthBridge events need special treatment because
   * counter access needs to be synchronized across all cores
@@ -441,9 +339,6 @@ __amd_get_nb_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *ev
         if (new == -1)
                 return &emptyconstraint;
 
-        if (amd_is_perfctr_nb_event(hwc))
-                amd_nb_interrupt_hw_config(hwc);
-
         return &nb->event_constraints[new];
 }
 
@@ -543,8 +438,7 @@ amd_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
         if (!(amd_has_nb(cpuc) && amd_is_nb_event(&event->hw)))
                 return &unconstrained;
 
-        return __amd_get_nb_event_constraints(cpuc, event,
-                                              amd_nb_event_constraint);
+        return __amd_get_nb_event_constraints(cpuc, event, NULL);
 }
 
 static void amd_put_event_constraints(struct cpu_hw_events *cpuc,
@@ -643,9 +537,6 @@ static struct event_constraint amd_f15_PMC30 = EVENT_CONSTRAINT_OVERLAP(0, 0x09,
 static struct event_constraint amd_f15_PMC50 = EVENT_CONSTRAINT(0, 0x3F, 0);
 static struct event_constraint amd_f15_PMC53 = EVENT_CONSTRAINT(0, 0x38, 0);
 
-static struct event_constraint amd_NBPMC96 = EVENT_CONSTRAINT(0, 0x3C0, 0);
-static struct event_constraint amd_NBPMC74 = EVENT_CONSTRAINT(0, 0xF0, 0);
-
 static struct event_constraint *
 amd_get_event_constraints_f15h(struct cpu_hw_events *cpuc, struct perf_event *event)
 {
@@ -711,8 +602,8 @@ amd_get_event_constraints_f15h(struct cpu_hw_events *cpuc, struct perf_event *ev
                         return &amd_f15_PMC20;
                 }
         case AMD_EVENT_NB:
-                return __amd_get_nb_event_constraints(cpuc, event,
-                                                      amd_nb_event_constraint);
+                /* moved to perf_event_amd_uncore.c */
+                return &emptyconstraint;
         default:
                 return &emptyconstraint;
         }
@@ -738,7 +629,6 @@ static __initconst const struct x86_pmu amd_pmu = {
         .eventsel               = MSR_K7_EVNTSEL0,
         .perfctr                = MSR_K7_PERFCTR0,
         .addr_offset            = amd_pmu_addr_offset,
-        .rdpmc_index            = amd_pmu_rdpmc_index,
         .event_map              = amd_pmu_event_map,
         .max_events             = ARRAY_SIZE(amd_perfmon_event_map),
         .num_counters           = AMD64_NUM_COUNTERS,
@@ -790,23 +680,6 @@ static int setup_perfctr_core(void)
         return 0;
 }
 
-static int setup_perfctr_nb(void)
-{
-        if (!cpu_has_perfctr_nb)
-                return -ENODEV;
-
-        x86_pmu.num_counters += AMD64_NUM_COUNTERS_NB;
-
-        if (cpu_has_perfctr_core)
-                amd_nb_event_constraint = &amd_NBPMC96;
-        else
-                amd_nb_event_constraint = &amd_NBPMC74;
-
-        printk(KERN_INFO "perf: AMD northbridge performance counters detected\n");
-
-        return 0;
-}
-
 __init int amd_pmu_init(void)
 {
         /* Performance-monitoring supported from K7 and later: */
@@ -817,7 +690,6 @@ __init int amd_pmu_init(void)
 
         setup_event_constraints();
         setup_perfctr_core();
-        setup_perfctr_nb();
 
         /* Events are common for all AMDs */
         memcpy(hw_cache_event_ids, amd_hw_cache_event_ids,