diff options
Diffstat (limited to 'tools/power/cpupower/utils/idle_monitor/mperf_monitor.c')
| -rw-r--r-- | tools/power/cpupower/utils/idle_monitor/mperf_monitor.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c index afb2e6f8edd3..e7d48cb563c0 100644 --- a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c +++ b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c @@ -19,6 +19,10 @@ #define MSR_APERF 0xE8 #define MSR_MPERF 0xE7 +#define RDPRU ".byte 0x0f, 0x01, 0xfd" +#define RDPRU_ECX_MPERF 0 +#define RDPRU_ECX_APERF 1 + #define MSR_TSC 0x10 #define MSR_AMD_HWCR 0xc0010015 @@ -89,6 +93,8 @@ static int mperf_get_tsc(unsigned long long *tsc) static int get_aperf_mperf(int cpu, unsigned long long *aval, unsigned long long *mval) { + unsigned long low_a, high_a; + unsigned long low_m, high_m; int ret; /* @@ -101,6 +107,20 @@ static int get_aperf_mperf(int cpu, unsigned long long *aval, return 1; } + if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_RDPRU) { + asm volatile(RDPRU + : "=a" (low_a), "=d" (high_a) + : "c" (RDPRU_ECX_APERF)); + asm volatile(RDPRU + : "=a" (low_m), "=d" (high_m) + : "c" (RDPRU_ECX_MPERF)); + + *aval = ((low_a) | (high_a) << 32); + *mval = ((low_m) | (high_m) << 32); + + return 0; + } + ret = read_msr(cpu, MSR_APERF, aval); ret |= read_msr(cpu, MSR_MPERF, mval); |