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In cpu_msrinfo(), add experimental support for AMD CPUs for INFO_CUR_MULTIPLIER, INFO_MAX_MULTIPLIER and INFO_BCLK

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get_amd_multipliers() allow to share a maximum of code
This commit is contained in:
Xorg 2016-06-04 19:50:21 +02:00
parent 14cfc77b17
commit 24cd11fea9
1 changed files with 62 additions and 16 deletions
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78
libcpuid/rdmsr.c
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@ -481,6 +481,20 @@ int cpu_msrinfo(struct msr_driver_t* driver, cpu_msrinfo_request_t which)
http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-system-programming-manual-325384.pdf
*/
/* AMD MSRs addresses */
#define MSR_PSTATE_L 0xC0010061
#define MSR_PSTATE_S 0xC0010063
#define MSR_PSTATE_0 0xC0010064
#define MSR_PSTATE_7 0xC001006B
/* Intel MSRs addresses */
#define IA32_PERF_STATUS 0x198
#define IA32_THERM_STATUS 0x19C
#define MSR_TURBO_RATIO_LIMIT 0x1AD
#define MSR_TEMPERATURE_TARGET 0x1A2
#define MSR_PERF_STATUS 0x198
#define MSR_PLATFORM_INFO 0xCE
static int rdmsr_supported(void)
{
@ -503,10 +517,34 @@ static int perfmsr_measure(struct msr_driver_t* handle, int msr)
return (int) ((y - x) / (b - a));
}
static int get_amd_multipliers(struct msr_driver_t* handle, struct internal_id_info_t *internal,
uint32_t pstate, uint64_t *multiplier)
{
int err;
uint64_t CpuFid, CpuDid;
double factor = 2.0;
if (pstate < MSR_PSTATE_0 || MSR_PSTATE_7 < pstate)
return 1;
/* Refer links above
Table 299: P-state Definitions
MSRC001_00[6B:64][8:6] is CpuDid
MSRC001_00[6B:64][5:0] is CpuFid
APUs -> 100MHz REFCLK
CPUs -> 200MHz REFCLK */
if (FUSION_C <= internal->code.amd && internal->code.amd <= FUSION_A)
factor = 1.0;
err = cpu_rdmsr_range(handle, pstate, 5, 0, &CpuFid);
err += cpu_rdmsr_range(handle, pstate, 8, 6, &CpuDid);
*multiplier = ((CpuFid + 0x10) / (1 << CpuDid)) / factor;
return err;
}
static double get_info_cur_multiplier(struct msr_driver_t* handle, struct cpu_id_t *id,
struct internal_id_info_t *internal)
{
#define IA32_PERF_STATUS 0x198
int err;
uint64_t reg;
@ -522,15 +560,20 @@ static double get_info_cur_multiplier(struct msr_driver_t* handle, struct cpu_id
err = cpu_rdmsr_range(handle, IA32_PERF_STATUS, 15, 8, &reg);
if (!err) return reg;
}
else if(id->vendor == VENDOR_AMD) {
/* Refer links above
MSRC001_0063[2:0] is CurPstate */
err = cpu_rdmsr_range(handle, MSR_PSTATE_S, 2, 0, &reg);
err += get_amd_multipliers(handle, internal, MSR_PSTATE_0 + reg, &reg);
if (!err) return reg;
}
return CPU_INVALID_VALUE;
#undef IA32_PERF_STATUS
}
static double get_info_max_multiplier(struct msr_driver_t* handle, struct cpu_id_t *id,
struct internal_id_info_t *internal)
{
#define MSR_TURBO_RATIO_LIMIT 0x1ad
int err;
uint64_t reg;
@ -557,16 +600,21 @@ static double get_info_max_multiplier(struct msr_driver_t* handle, struct cpu_id
err = cpu_rdmsr_range(handle, MSR_TURBO_RATIO_LIMIT, 7, 0, &reg);
if (!err) return reg;
}
else if(id->vendor == VENDOR_AMD) {
/* Refer links above
MSRC001_0064 is Pb0
Pb0 is highest-performance boosted P-state */
err = get_amd_multipliers(handle, internal, MSR_PSTATE_0, &reg);
if (!err) return reg;
}
return CPU_INVALID_VALUE;
#undef MSR_TURBO_RATIO_LIMIT
}
static int get_info_temperature(struct msr_driver_t* handle, struct cpu_id_t *id,
struct internal_id_info_t *internal)
{
#define IA32_THERM_STATUS 0x19C
#define MSR_TEMPERATURE_TARGET 0x1a2
int err;
uint64_t DigitalReadout, ReadingValid, TemperatureTarget;
@ -590,16 +638,11 @@ static int get_info_temperature(struct msr_driver_t* handle, struct cpu_id_t *id
}
return CPU_INVALID_VALUE;
#undef IA32_THERM_STATUS
#undef MSR_TEMPERATURE_TARGET
}
static double get_info_voltage(struct msr_driver_t* handle, struct cpu_id_t *id,
struct internal_id_info_t *internal)
{
#define MSR_PERF_STATUS 0x198
#define MSR_PSTATE_S 0xC0010063
#define MSR_PSTATE_0 0xC0010064
int err;
uint64_t reg, CpuVid;
@ -622,15 +665,11 @@ static double get_info_voltage(struct msr_driver_t* handle, struct cpu_id_t *id,
}
return CPU_INVALID_VALUE;
#undef MSR_PERF_STATUS
#undef MSR_PSTATE_S
#undef MSR_PSTATE_0
}
static double get_info_bclk(struct msr_driver_t* handle, struct cpu_id_t *id,
struct internal_id_info_t *internal)
{
#define MSR_PLATFORM_INFO 0xce
int err;
static int clock = 0;
uint64_t reg;
@ -651,9 +690,16 @@ static double get_info_bclk(struct msr_driver_t* handle, struct cpu_id_t *id,
err = cpu_rdmsr_range(handle, MSR_PLATFORM_INFO, 15, 8, &reg);
if (!err) return (double) clock / reg;
}
else if(id->vendor == VENDOR_AMD) {
/* Refer links above
MSRC001_0061[2:0] is CurPstateLimit
CurPstateLimit is highest-performance non-boosted P-state */
err = cpu_rdmsr_range(handle, MSR_PSTATE_L, 2, 0, &reg);
err += get_amd_multipliers(handle, internal, MSR_PSTATE_0 + reg, &reg);
if (!err) return (double) clock / reg;
}
return CPU_INVALID_VALUE;
#undef MSR_PLATFORM_INFO
}
#ifndef MSRINFO_DEFINED