diff options
Diffstat (limited to 'arch/mips/oprofile/op_model_mipsxx.c')
| -rw-r--r-- | arch/mips/oprofile/op_model_mipsxx.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c index 28ea1a4cc576..786254630403 100644 --- a/arch/mips/oprofile/op_model_mipsxx.c +++ b/arch/mips/oprofile/op_model_mipsxx.c @@ -31,8 +31,22 @@ #define M_COUNTER_OVERFLOW (1UL << 31) +/* Netlogic XLR specific, count events in all threads in a core */ +#define M_PERFCTL_COUNT_ALL_THREADS (1UL << 13) + static int (*save_perf_irq)(void); +/* + * XLR has only one set of counters per core. Designate the + * first hardware thread in the core for setup and init. + * Skip CPUs with non-zero hardware thread id (4 hwt per core) + */ +#ifdef CONFIG_CPU_XLR +#define oprofile_skip_cpu(c) ((cpu_logical_map(c) & 0x3) != 0) +#else +#define oprofile_skip_cpu(c) 0 +#endif + #ifdef CONFIG_MIPS_MT_SMP static int cpu_has_mipsmt_pertccounters; #define WHAT (M_TC_EN_VPE | \ @@ -152,6 +166,8 @@ static void mipsxx_reg_setup(struct op_counter_config *ctr) reg.control[i] |= M_PERFCTL_USER; if (ctr[i].exl) reg.control[i] |= M_PERFCTL_EXL; + if (current_cpu_type() == CPU_XLR) + reg.control[i] |= M_PERFCTL_COUNT_ALL_THREADS; reg.counter[i] = 0x80000000 - ctr[i].count; } } @@ -162,6 +178,9 @@ static void mipsxx_cpu_setup(void *args) { unsigned int counters = op_model_mipsxx_ops.num_counters; + if (oprofile_skip_cpu(smp_processor_id())) + return; + switch (counters) { case 4: w_c0_perfctrl3(0); @@ -183,6 +202,9 @@ static void mipsxx_cpu_start(void *args) { unsigned int counters = op_model_mipsxx_ops.num_counters; + if (oprofile_skip_cpu(smp_processor_id())) + return; + switch (counters) { case 4: w_c0_perfctrl3(WHAT | reg.control[3]); @@ -200,6 +222,9 @@ static void mipsxx_cpu_stop(void *args) { unsigned int counters = op_model_mipsxx_ops.num_counters; + if (oprofile_skip_cpu(smp_processor_id())) + return; + switch (counters) { case 4: w_c0_perfctrl3(0); @@ -372,6 +397,10 @@ static int __init mipsxx_init(void) op_model_mipsxx_ops.cpu_type = "mips/loongson1"; break; + case CPU_XLR: + op_model_mipsxx_ops.cpu_type = "mips/xlr"; + break; + default: printk(KERN_ERR "Profiling unsupported for this CPU\n"); |