diff options
| -rw-r--r-- | drivers/hwmon/fam15h_power.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hwmon/fam15h_power.c b/drivers/hwmon/fam15h_power.c index a46e166cdd7e..5f7067d7b625 100644 --- a/drivers/hwmon/fam15h_power.c +++ b/drivers/hwmon/fam15h_power.c @@ -26,6 +26,7 @@ #include <linux/pci.h> #include <linux/bitops.h> #include <asm/processor.h> +#include <asm/msr.h> MODULE_DESCRIPTION("AMD Family 15h CPU processor power monitor"); MODULE_AUTHOR("Andreas Herrmann <herrmann.der.user@googlemail.com>"); @@ -44,6 +45,8 @@ MODULE_LICENSE("GPL"); #define FAM15H_MIN_NUM_ATTRS 2 #define FAM15H_NUM_GROUPS 2 +#define MSR_F15H_CU_MAX_PWR_ACCUMULATOR 0xc001007b + struct fam15h_power_data { struct pci_dev *pdev; unsigned int tdp_to_watts; @@ -52,6 +55,8 @@ struct fam15h_power_data { unsigned int cpu_pwr_sample_ratio; const struct attribute_group *groups[FAM15H_NUM_GROUPS]; struct attribute_group group; + /* maximum accumulated power of a compute unit */ + u64 max_cu_acc_power; }; static ssize_t show_power(struct device *dev, @@ -241,6 +246,13 @@ static int fam15h_power_init_data(struct pci_dev *f4, */ data->cpu_pwr_sample_ratio = ecx; + if (rdmsrl_safe(MSR_F15H_CU_MAX_PWR_ACCUMULATOR, &tmp)) { + pr_err("Failed to read max compute unit power accumulator MSR\n"); + return -ENODEV; + } + + data->max_cu_acc_power = tmp; + return 0; } |