[PATCH v5 16/16] tools/cpupower: enable Hygon support to cpupower tool

Pu Wen
2018-08-29T12:46:20Z

Tool cpupower is useful to get CPU frequency information and monitor
power stats on Hygon platforms. So enable platform support to cpupower
for Hygon Dhyana Family 0x18 processors by checking vendor ID & family
and vendor string by using the code path of AMD family 0x17.

Signed-off-by: Pu Wen <puwen@hygon.cn>
---
tools/power/cpupower/utils/cpufreq-info.c | 6 ++++--
tools/power/cpupower/utils/helpers/amd.c | 6 ++++--
tools/power/cpupower/utils/helpers/cpuid.c | 8 +++++---
tools/power/cpupower/utils/helpers/helpers.h | 2 +-
tools/power/cpupower/utils/helpers/misc.c | 3 ++-
tools/power/cpupower/utils/idle_monitor/mperf_monitor.c | 3 ++-
6 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
index df43cd4..56e54ea 100644
--- a/tools/power/cpupower/utils/cpufreq-info.c
+++ b/tools/power/cpupower/utils/cpufreq-info.c
@@ -170,6 +170,7 @@ static int get_boost_mode(unsigned int cpu)
unsigned long pstates[MAX_HW_PSTATES] = {0,};

if (cpupower_cpu_info.vendor != X86_VENDOR_AMD &&
+ cpupower_cpu_info.vendor != X86_VENDOR_HYGON &&
cpupower_cpu_info.vendor != X86_VENDOR_INTEL)
return 0;

@@ -190,8 +191,9 @@ static int get_boost_mode(unsigned int cpu)
printf(_(" Supported: %s\n"), support ? _("yes") : _("no"));
printf(_(" Active: %s\n"), active ? _("yes") : _("no"));

- if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
- cpupower_cpu_info.family >= 0x10) {
+ if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
+ cpupower_cpu_info.family >= 0x10) ||
+ cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
ret = decode_pstates(cpu, cpupower_cpu_info.family, b_states,
pstates, &pstate_no);
if (ret)
diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index bb41cdd..dbce56c 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c
@@ -45,7 +45,8 @@ static int get_did(int family, union msr_pstate pstate)

if (family == 0x12)
t = pstate.val & 0xf;
- else if (family == 0x17)
+ else if (family == 0x17 ||
+ (family == 0x18 && cpupower_cpu_info.vendor == X86_VENDOR_HYGON))
t = pstate.fam17h_bits.did;
else
t = pstate.bits.did;
@@ -59,7 +60,8 @@ static int get_cof(int family, union msr_pstate pstate)
int fid, did, cof;

did = get_did(family, pstate);
- if (family == 0x17) {
+ if (family == 0x17 ||
+ (family == 0x18 && cpupower_cpu_info.vendor == X86_VENDOR_HYGON)) {
fid = pstate.fam17h_bits.fid;
cof = 200 * fid / did;
} else {
diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index 732b0b4..5cc39d4 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -8,7 +8,7 @@
#include "helpers/helpers.h"

static const char *cpu_vendor_table[X86_VENDOR_MAX] = {
- "Unknown", "GenuineIntel", "AuthenticAMD",
+ "Unknown", "GenuineIntel", "AuthenticAMD", "HygonGenuine",
};

#if defined(__i386__) || defined(__x86_64__)
@@ -109,6 +109,7 @@ int get_cpu_info(struct cpupower_cpu_info *cpu_info)
fclose(fp);
/* Get some useful CPU capabilities from cpuid */
if (cpu_info->vendor != X86_VENDOR_AMD &&
+ cpu_info->vendor != X86_VENDOR_HYGON &&
cpu_info->vendor != X86_VENDOR_INTEL)
return ret;

@@ -124,8 +125,9 @@ int get_cpu_info(struct cpupower_cpu_info *cpu_info)
if (cpuid_level >= 6 && (cpuid_ecx(6) & 0x1))
cpu_info->caps |= CPUPOWER_CAP_APERF;

- /* AMD Boost state enable/disable register */
- if (cpu_info->vendor == X86_VENDOR_AMD) {
+ /* AMD or Hygon Boost state enable/disable register */
+ if (cpu_info->vendor == X86_VENDOR_AMD ||
+ cpu_info->vendor == X86_VENDOR_HYGON) {
if (ext_cpuid_level >= 0x80000007 &&
(cpuid_edx(0x80000007) & (1 << 9)))
cpu_info->caps |= CPUPOWER_CAP_AMD_CBP;
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index 41da392..9021396 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -61,7 +61,7 @@ extern int be_verbose;

/* cpuid and cpuinfo helpers **************************/
enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
- X86_VENDOR_AMD, X86_VENDOR_MAX};
+ X86_VENDOR_AMD, X86_VENDOR_HYGON, X86_VENDOR_MAX};

#define CPUPOWER_CAP_INV_TSC 0x00000001
#define CPUPOWER_CAP_APERF 0x00000002
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 80fdf55..0be93ee 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -26,7 +26,8 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
* has Hardware determined variable increments instead.
*/

- if (cpu_info.family == 0x17) {
+ if (cpu_info.family == 0x17 ||
+ (cpu_info.family == 0x18 && cpu_info.vendor == X86_VENDOR_HYGON)) {
if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
if (!(val & CPUPOWER_AMD_CPBDIS))
*active = 1;
diff --git a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
index d7c2a6d..f2a7e9c 100644
--- a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
+++ b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
@@ -241,7 +241,8 @@ static int init_maxfreq_mode(void)
if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_INV_TSC))
goto use_sysfs;

- if (cpupower_cpu_info.vendor == X86_VENDOR_AMD) {
+ if (cpupower_cpu_info.vendor == X86_VENDOR_AMD ||
+ cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
/* MSR_AMD_HWCR tells us whether TSC runs at P0/mperf
* freq.
* A test whether hwcr is accessable/available would be:
--
2.7.4