From faa28ae018ed004a22aa4a7704e04ccdde4a941e Mon Sep 17 00:00:00 2001 From: Robert Richter Date: Wed, 29 Apr 2009 12:47:13 +0200 Subject: [PATCH] perf_counter, x86: make pmu version generic This makes the use of the version variable generic. Also, some debug messages have been generalized. [ Impact: refactor and generalize code ] Signed-off-by: Robert Richter Cc: Paul Mackerras Acked-by: Peter Zijlstra LKML-Reference: <1241002046-8832-17-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar --- arch/x86/kernel/cpu/perf_counter.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c index 75dbb1f0900e..15d2c03e16f1 100644 --- a/arch/x86/kernel/cpu/perf_counter.c +++ b/arch/x86/kernel/cpu/perf_counter.c @@ -39,6 +39,8 @@ struct cpu_hw_counters { * struct x86_pmu - generic x86 pmu */ struct x86_pmu { + const char *name; + int version; int (*handle_irq)(struct pt_regs *, int); u64 (*save_disable_all)(void); void (*restore_all)(u64); @@ -61,8 +63,6 @@ static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters) = { .enabled = 1, }; -static __read_mostly int intel_perfmon_version; - /* * Intel PerfMon v3. Used on Core2 and later. */ @@ -658,7 +658,7 @@ void perf_counter_print_debug(void) cpu = smp_processor_id(); cpuc = &per_cpu(cpu_hw_counters, cpu); - if (intel_perfmon_version >= 2) { + if (x86_pmu.version >= 2) { rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, ctrl); rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status); rdmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, overflow); @@ -884,6 +884,7 @@ static __read_mostly struct notifier_block perf_counter_nmi_notifier = { }; static struct x86_pmu intel_pmu = { + .name = "Intel", .handle_irq = intel_pmu_handle_irq, .save_disable_all = intel_pmu_save_disable_all, .restore_all = intel_pmu_restore_all, @@ -897,6 +898,7 @@ static struct x86_pmu intel_pmu = { }; static struct x86_pmu amd_pmu = { + .name = "AMD", .handle_irq = amd_pmu_handle_irq, .save_disable_all = amd_pmu_save_disable_all, .restore_all = amd_pmu_restore_all, @@ -918,6 +920,7 @@ static int intel_pmu_init(void) union cpuid10_eax eax; unsigned int unused; unsigned int ebx; + int version; if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) return -ENODEV; @@ -930,16 +933,12 @@ static int intel_pmu_init(void) if (eax.split.mask_length <= ARCH_PERFMON_BRANCH_MISSES_RETIRED) return -ENODEV; - intel_perfmon_version = eax.split.version_id; - if (intel_perfmon_version < 2) + version = eax.split.version_id; + if (version < 2) return -ENODEV; - pr_info("Intel Performance Monitoring support detected.\n"); - pr_info("... version: %d\n", intel_perfmon_version); - pr_info("... bit width: %d\n", eax.split.bit_width); - pr_info("... mask length: %d\n", eax.split.mask_length); - x86_pmu = intel_pmu; + x86_pmu.version = version; x86_pmu.num_counters = eax.split.num_counters; x86_pmu.num_counters_fixed = edx.split.num_counters_fixed; x86_pmu.counter_bits = eax.split.bit_width; @@ -951,7 +950,6 @@ static int intel_pmu_init(void) static int amd_pmu_init(void) { x86_pmu = amd_pmu; - pr_info("AMD Performance Monitoring support detected.\n"); return 0; } @@ -972,6 +970,10 @@ void __init init_hw_perf_counters(void) if (err != 0) return; + pr_info("%s Performance Monitoring support detected.\n", x86_pmu.name); + pr_info("... version: %d\n", x86_pmu.version); + pr_info("... bit width: %d\n", x86_pmu.counter_bits); + pr_info("... num counters: %d\n", x86_pmu.num_counters); if (x86_pmu.num_counters > X86_PMC_MAX_GENERIC) { x86_pmu.num_counters = X86_PMC_MAX_GENERIC; -- 2.20.1