static void mux_clone(int cpu)
{
if (!has_mux())
return;
memcpy(per_cpu(cpu_msrs, cpu).multiplex,
per_cpu(cpu_msrs, 0).multiplex,
sizeof(struct op_msr) * model->num_virt_counters);
}
static int nmi_switch_event(void)
{
if (!has_mux())
return -ENOSYS; /* not implemented */
if (nmi_multiplex_on() < 0)
return -EINVAL; /* not necessary */
on_each_cpu(nmi_cpu_switch, NULL, 1);
return 0;
}
static void nmi_shutdown_mux(void)
{
int i;
if (!has_mux())
return;
for_each_possible_cpu(i) {
kfree(per_cpu(cpu_msrs, i).multiplex);
per_cpu(cpu_msrs, i).multiplex = NULL;
per_cpu(switch_index, i) = 0;
}
}
static int nmi_switch_event(void)
{
if (!has_mux())
return -ENOSYS; /* not implemented */
if (nmi_multiplex_on() < 0)
return -EINVAL; /* not necessary */
get_online_cpus();
if (ctr_running)
on_each_cpu(nmi_cpu_switch, NULL, 1);
put_online_cpus();
return 0;
}
static int nmi_setup_mux(void)
{
size_t multiplex_size =
sizeof(struct op_msr) * model->num_virt_counters;
int i;
if (!has_mux())
return 1;
for_each_possible_cpu(i) {
per_cpu(cpu_msrs, i).multiplex =
kmalloc(multiplex_size, GFP_KERNEL);
if (!per_cpu(cpu_msrs, i).multiplex)
return 0;
}
return 1;
}
static void nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs)
{
int i;
struct op_msr *multiplex = msrs->multiplex;
if (!has_mux())
return;
for (i = 0; i < model->num_virt_counters; ++i) {
if (counter_config[i].enabled) {
multiplex[i].saved = -(u64)counter_config[i].count;
} else {
multiplex[i].saved = 0;
}
}
per_cpu(switch_index, cpu) = 0;
}
static inline void mux_init(struct oprofile_operations *ops)
{
if (has_mux())
ops->switch_events = nmi_switch_event;
}
