librapl.c revision 1.1 
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright �� 2020 Intel Corporation
4 */
5
6#include <asm/msr.h>
7
8#include "librapl.h"
9
10u64 librapl_energy_uJ(void)
11{
12	unsigned long long power;
13	u32 units;
14
15	if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &power))
16		return 0;
17
18	units = (power & 0x1f00) >> 8;
19
20	if (rdmsrl_safe(MSR_PP1_ENERGY_STATUS, &power))
21		return 0;
22
23	return (1000000 * power) >> units; /* convert to uJ */
24}
25