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x86/oprofile: Implement mux_clone()

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To setup a counter for all cpus, its structure is cloned from cpu
0. This patch implements mux_clone() to do this part for multiplexing
data.

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2009-07-09 21:42:51 +02:00
parent 5280514471
commit 4d015f79e9
1 changed files with 22 additions and 13 deletions
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35
arch/x86/oprofile/nmi_int.c
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@ -264,6 +264,16 @@ static inline void mux_init(struct oprofile_operations *ops)
ops->switch_events = nmi_switch_event;
}
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);
}
#else
inline int op_x86_phys_to_virt(int phys) { return phys; }
@ -272,6 +282,7 @@ static inline int nmi_setup_mux(void) { return 1; }
static inline void
nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs) { }
static inline void mux_init(struct oprofile_operations *ops) { }
static void mux_clone(int cpu) { }
#endif
@ -350,20 +361,18 @@ static int nmi_setup(void)
/* Assume saved/restored counters are the same on all CPUs */
model->fill_in_addresses(&per_cpu(cpu_msrs, 0));
for_each_possible_cpu(cpu) {
if (cpu != 0) {
memcpy(per_cpu(cpu_msrs, cpu).counters,
per_cpu(cpu_msrs, 0).counters,
sizeof(struct op_msr) * model->num_counters);
if (!cpu)
continue;
memcpy(per_cpu(cpu_msrs, cpu).controls,
per_cpu(cpu_msrs, 0).controls,
sizeof(struct op_msr) * model->num_controls);
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
memcpy(per_cpu(cpu_msrs, cpu).multiplex,
per_cpu(cpu_msrs, 0).multiplex,
sizeof(struct op_msr) * model->num_virt_counters);
#endif
}
memcpy(per_cpu(cpu_msrs, cpu).counters,
per_cpu(cpu_msrs, 0).counters,
sizeof(struct op_msr) * model->num_counters);
memcpy(per_cpu(cpu_msrs, cpu).controls,
per_cpu(cpu_msrs, 0).controls,
sizeof(struct op_msr) * model->num_controls);
mux_clone(cpu);
}
on_each_cpu(nmi_cpu_setup, NULL, 1);
nmi_enabled = 1;