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hwmon: (fam15h_power) Add max compute unit accumulated power 

This patch adds a member in fam15h_power_data which specifies the
maximum accumulated power in a compute unit.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Huang Rui 2015-10-30 17:56:57 +08:00 committed by Guenter Roeck
parent 46f29c2b49
commit 3b5ea47dbf
1 changed files with 12 additions and 0 deletions
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12
drivers/hwmon/fam15h_power.c
View File

@ -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;
}