diff options
Diffstat (limited to 'drivers/powercap/intel_rapl.c')
| -rw-r--r-- | drivers/powercap/intel_rapl.c | 29 |
1 files changed, 9 insertions, 20 deletions
diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index d9a0770b6c73..1c987d20c6b8 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -1124,8 +1124,7 @@ err_cleanup_package: static int rapl_check_domain(int cpu, int domain) { unsigned msr; - u64 val1, val2 = 0; - int retry = 0; + u64 val = 0; switch (domain) { case RAPL_DOMAIN_PACKAGE: @@ -1144,26 +1143,13 @@ static int rapl_check_domain(int cpu, int domain) pr_err("invalid domain id %d\n", domain); return -EINVAL; } - if (rdmsrl_safe_on_cpu(cpu, msr, &val1)) - return -ENODEV; - - /* PP1/uncore/graphics domain may not be active at the time of - * driver loading. So skip further checks. + /* make sure domain counters are available and contains non-zero + * values, otherwise skip it. */ - if (domain == RAPL_DOMAIN_PP1) - return 0; - /* energy counters roll slowly on some domains */ - while (++retry < 10) { - usleep_range(10000, 15000); - rdmsrl_safe_on_cpu(cpu, msr, &val2); - if ((val1 & ENERGY_STATUS_MASK) != (val2 & ENERGY_STATUS_MASK)) - return 0; - } - /* if energy counter does not change, report as bad domain */ - pr_info("domain %s energy ctr %llu:%llu not working, skip\n", - rapl_domain_names[domain], val1, val2); + if (rdmsrl_safe_on_cpu(cpu, msr, &val) || !val) + return -ENODEV; - return -ENODEV; + return 0; } /* Detect active and valid domains for the given CPU, caller must @@ -1180,6 +1166,9 @@ static int rapl_detect_domains(struct rapl_package *rp, int cpu) /* use physical package id to read counters */ if (!rapl_check_domain(cpu, i)) rp->domain_map |= 1 << i; + else + pr_warn("RAPL domain %s detection failed\n", + rapl_domain_names[i]); } rp->nr_domains = bitmap_weight(&rp->domain_map, RAPL_DOMAIN_MAX); if (!rp->nr_domains) { |