Merge git://git.infradead.org/users/dwmw2/mtd-2.6.38

[mv-sheeva.git] / arch / x86 / kernel / cpu / perf_event_p4.c

diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index e56b9bfbabd124ee78f2bb74c4816fafa74517f7..ff751a9f182b15bcb5ff94a00079c26a3d80229d 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -682,7 +682,7 @@ static int p4_validate_raw_event(struct perf_event *event)
         * if an event is shared accross the logical threads
         * the user needs special permissions to be able to use it
         */
-       if (p4_event_bind_map[v].shared) {
+       if (p4_ht_active() && p4_event_bind_map[v].shared) {
                if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
                        return -EACCES;
        }
@@ -727,7 +727,8 @@ static int p4_hw_config(struct perf_event *event)
                event->hw.config = p4_set_ht_bit(event->hw.config);
 
        if (event->attr.type == PERF_TYPE_RAW) {
-
+               struct p4_event_bind *bind;
+               unsigned int esel;
                /*
                 * Clear bits we reserve to be managed by kernel itself
                 * and never allowed from a user space
@@ -743,6 +744,13 @@ static int p4_hw_config(struct perf_event *event)
                 * bits since we keep additional info here (for cache events and etc)
                 */
                event->hw.config |= event->attr.config;
+               bind = p4_config_get_bind(event->attr.config);
+               if (!bind) {
+                       rc = -EINVAL;
+                       goto out;
+               }
+               esel = P4_OPCODE_ESEL(bind->opcode);
+               event->hw.config |= p4_config_pack_cccr(P4_CCCR_ESEL(esel));
        }
 
        rc = x86_setup_perfctr(event);
@@ -762,9 +770,14 @@ static inline int p4_pmu_clear_cccr_ovf(struct hw_perf_event *hwc)
                return 1;
        }
 
-       /* it might be unflagged overflow */
-       rdmsrl(hwc->event_base + hwc->idx, v);
-       if (!(v & ARCH_P4_CNTRVAL_MASK))
+       /*
+        * In some circumstances the overflow might issue an NMI but did
+        * not set P4_CCCR_OVF bit. Because a counter holds a negative value
+        * we simply check for high bit being set, if it's cleared it means
+        * the counter has reached zero value and continued counting before
+        * real NMI signal was received:
+        */
+       if (!(v & ARCH_P4_UNFLAGGED_BIT))
                return 1;
 
        return 0;