diff options
| -rw-r--r-- | arch/x86/events/amd/uncore.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c index 0fafe233bba4..a0b4405476b7 100644 --- a/arch/x86/events/amd/uncore.c +++ b/arch/x86/events/amd/uncore.c @@ -658,17 +658,20 @@ int amd_uncore_df_ctx_init(struct amd_uncore *uncore, unsigned int cpu) { struct attribute **df_attr = amd_uncore_df_format_attr; struct amd_uncore_pmu *pmu; + int num_counters; /* Run just once */ if (uncore->init_done) return amd_uncore_ctx_init(uncore, cpu); + num_counters = amd_uncore_ctx_num_pmcs(uncore, cpu); + if (!num_counters) + goto done; + /* No grouping, single instance for a system */ uncore->pmus = kzalloc(sizeof(*uncore->pmus), GFP_KERNEL); - if (!uncore->pmus) { - uncore->num_pmus = 0; + if (!uncore->pmus) goto done; - } /* * For Family 17h and above, the Northbridge counters are repurposed @@ -678,7 +681,7 @@ int amd_uncore_df_ctx_init(struct amd_uncore *uncore, unsigned int cpu) pmu = &uncore->pmus[0]; strscpy(pmu->name, boot_cpu_data.x86 >= 0x17 ? "amd_df" : "amd_nb", sizeof(pmu->name)); - pmu->num_counters = amd_uncore_ctx_num_pmcs(uncore, cpu); + pmu->num_counters = num_counters; pmu->msr_base = MSR_F15H_NB_PERF_CTL; pmu->rdpmc_base = RDPMC_BASE_NB; pmu->group = amd_uncore_ctx_gid(uncore, cpu); @@ -789,17 +792,20 @@ int amd_uncore_l3_ctx_init(struct amd_uncore *uncore, unsigned int cpu) { struct attribute **l3_attr = amd_uncore_l3_format_attr; struct amd_uncore_pmu *pmu; + int num_counters; /* Run just once */ if (uncore->init_done) return amd_uncore_ctx_init(uncore, cpu); + num_counters = amd_uncore_ctx_num_pmcs(uncore, cpu); + if (!num_counters) + goto done; + /* No grouping, single instance for a system */ uncore->pmus = kzalloc(sizeof(*uncore->pmus), GFP_KERNEL); - if (!uncore->pmus) { - uncore->num_pmus = 0; + if (!uncore->pmus) goto done; - } /* * For Family 17h and above, L3 cache counters are available instead @@ -809,7 +815,7 @@ int amd_uncore_l3_ctx_init(struct amd_uncore *uncore, unsigned int cpu) pmu = &uncore->pmus[0]; strscpy(pmu->name, boot_cpu_data.x86 >= 0x17 ? "amd_l3" : "amd_l2", sizeof(pmu->name)); - pmu->num_counters = amd_uncore_ctx_num_pmcs(uncore, cpu); + pmu->num_counters = num_counters; pmu->msr_base = MSR_F16H_L2I_PERF_CTL; pmu->rdpmc_base = RDPMC_BASE_LLC; pmu->group = amd_uncore_ctx_gid(uncore, cpu); |