xps: Transmit Packet Steering

[net-next-2.6.git] / kernel / hw_breakpoint.c

diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c
index c7c2aed9e2dcc2e52669e7d3880be0666c496bff..2c9120f0afca9872cc4edba57d4e5cfe9311788f 100644 (file)
--- a/kernel/hw_breakpoint.c
+++ b/kernel/hw_breakpoint.c
@@ -113,12 +113,12 @@ static unsigned int max_task_bp_pinned(int cpu, enum bp_type_idx type)
  */
 static int task_bp_pinned(struct perf_event *bp, enum bp_type_idx type)
 {
-       struct perf_event_context *ctx = bp->ctx;
+       struct task_struct *tsk = bp->hw.bp_target;
        struct perf_event *iter;
        int count = 0;
 
        list_for_each_entry(iter, &bp_task_head, hw.bp_list) {
-               if (iter->ctx == ctx && find_slot_idx(iter) == type)
+               if (iter->hw.bp_target == tsk && find_slot_idx(iter) == type)
                        count += hw_breakpoint_weight(iter);
        }
 
@@ -134,7 +134,7 @@ fetch_bp_busy_slots(struct bp_busy_slots *slots, struct perf_event *bp,
                    enum bp_type_idx type)
 {
        int cpu = bp->cpu;
-       struct task_struct *tsk = bp->ctx->task;
+       struct task_struct *tsk = bp->hw.bp_target;
 
        if (cpu >= 0) {
                slots->pinned = per_cpu(nr_cpu_bp_pinned[type], cpu);
@@ -213,7 +213,7 @@ toggle_bp_slot(struct perf_event *bp, bool enable, enum bp_type_idx type,
               int weight)
 {
        int cpu = bp->cpu;
-       struct task_struct *tsk = bp->ctx->task;
+       struct task_struct *tsk = bp->hw.bp_target;
 
        /* Pinned counter cpu profiling */
        if (!tsk) {
@@ -433,8 +433,7 @@ register_user_hw_breakpoint(struct perf_event_attr *attr,
                            perf_overflow_handler_t triggered,
                            struct task_struct *tsk)
 {
-       return perf_event_create_kernel_counter(attr, -1, task_pid_vnr(tsk),
-                                               triggered);
+       return perf_event_create_kernel_counter(attr, -1, tsk, triggered);
 }
 EXPORT_SYMBOL_GPL(register_user_hw_breakpoint);
 
@@ -516,7 +515,7 @@ register_wide_hw_breakpoint(struct perf_event_attr *attr,
        get_online_cpus();
        for_each_online_cpu(cpu) {
                pevent = per_cpu_ptr(cpu_events, cpu);
-               bp = perf_event_create_kernel_counter(attr, cpu, -1, triggered);
+               bp = perf_event_create_kernel_counter(attr, cpu, NULL, triggered);
 
                *pevent = bp;
 
@@ -566,6 +565,61 @@ static struct notifier_block hw_breakpoint_exceptions_nb = {
        .priority = 0x7fffffff
 };
 
+static void bp_perf_event_destroy(struct perf_event *event)
+{
+       release_bp_slot(event);
+}
+
+static int hw_breakpoint_event_init(struct perf_event *bp)
+{
+       int err;
+
+       if (bp->attr.type != PERF_TYPE_BREAKPOINT)
+               return -ENOENT;
+
+       err = register_perf_hw_breakpoint(bp);
+       if (err)
+               return err;
+
+       bp->destroy = bp_perf_event_destroy;
+
+       return 0;
+}
+
+static int hw_breakpoint_add(struct perf_event *bp, int flags)
+{
+       if (!(flags & PERF_EF_START))
+               bp->hw.state = PERF_HES_STOPPED;
+
+       return arch_install_hw_breakpoint(bp);
+}
+
+static void hw_breakpoint_del(struct perf_event *bp, int flags)
+{
+       arch_uninstall_hw_breakpoint(bp);
+}
+
+static void hw_breakpoint_start(struct perf_event *bp, int flags)
+{
+       bp->hw.state = 0;
+}
+
+static void hw_breakpoint_stop(struct perf_event *bp, int flags)
+{
+       bp->hw.state = PERF_HES_STOPPED;
+}
+
+static struct pmu perf_breakpoint = {
+       .task_ctx_nr    = perf_sw_context, /* could eventually get its own */
+
+       .event_init     = hw_breakpoint_event_init,
+       .add            = hw_breakpoint_add,
+       .del            = hw_breakpoint_del,
+       .start          = hw_breakpoint_start,
+       .stop           = hw_breakpoint_stop,
+       .read           = hw_breakpoint_pmu_read,
+};
+
 static int __init init_hw_breakpoint(void)
 {
        unsigned int **task_bp_pinned;
@@ -587,6 +641,8 @@ static int __init init_hw_breakpoint(void)
 
        constraints_initialized = 1;
 
+       perf_pmu_register(&perf_breakpoint);
+
        return register_die_notifier(&hw_breakpoint_exceptions_nb);
 
  err_alloc:
@@ -602,8 +658,3 @@ static int __init init_hw_breakpoint(void)
 core_initcall(init_hw_breakpoint);
 
 
-struct pmu perf_ops_bp = {
-       .enable         = arch_install_hw_breakpoint,
-       .disable        = arch_uninstall_hw_breakpoint,
-       .read           = hw_breakpoint_pmu_read,
-};