[RFC PATCH v2] tools/power turbostat: Add support for Hygon Fam 18h (Dhyana) RAPL

[Pu Wen]

Commit 9392bd98bba760be96ee ("tools/power turbostat: Add support for AMD
Fam 17h (Zen) RAPL") and the commit 3316f99a9f1b68c578c5 ("tools/power
turbostat: Also read package power on AMD F17h (Zen)") add AMD Fam 17h
RAPL support.

Hygon Family 18h(Dhyana) support RAPL in bit 14 of CPUID 0x80000007 EDX,
and has MSRs RAPL_PWR_UNIT/CORE_ENERGY_STAT/PKG_ENERGY_STAT. So add Hygon
Dhyana Family 18h support for RAPL.

Already tested on Hygon multi-node systems and it shows correct per-core
energy usage and the total package power.

Signed-off-by: Pu Wen <pu...@hygon.cn>
Reviewed-by: Calvin Walton <calvin.wal...@kepstin.ca>
---
 tools/power/x86/turbostat/turbostat.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/power/x86/turbostat/turbostat.c 
b/tools/power/x86/turbostat/turbostat.c
index 1cd28eb..d42f3f5 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -60,6 +60,7 @@ unsigned int do_irtl_hsw;
 unsigned int units = 1000000;  /* MHz etc */
 unsigned int genuine_intel;
 unsigned int authentic_amd;
+unsigned int hygon_genuine;
 unsigned int max_level, max_extended_level;
 unsigned int has_invariant_tsc;
 unsigned int do_nhm_platform_info;
@@ -1714,7 +1715,7 @@ void get_apic_id(struct thread_data *t)
        if (!DO_BIC(BIC_X2APIC))
                return;
 
-       if (authentic_amd) {
+       if (authentic_amd || hygon_genuine) {
                unsigned int topology_extensions;
 
                if (max_extended_level < 0x8000001e)
@@ -3803,6 +3804,7 @@ double get_tdp_amd(unsigned int family)
 {
        switch (family) {
        case 0x17:
+       case 0x18:
        default:
                /* This is the max stock TDP of HEDT/Server Fam17h chips */
                return 250.0;
@@ -3982,6 +3984,7 @@ void rapl_probe_amd(unsigned int family, unsigned int 
model)
 
        switch (family) {
        case 0x17: /* Zen, Zen+ */
+       case 0x18: /* Hygon Dhyana */
                do_rapl = RAPL_AMD_F17H | RAPL_PER_CORE_ENERGY;
                if (rapl_joules) {
                        BIC_PRESENT(BIC_Pkg_J);
@@ -4018,7 +4021,7 @@ void rapl_probe(unsigned int family, unsigned int model)
 {
        if (genuine_intel)
                rapl_probe_intel(family, model);
-       if (authentic_amd)
+       if (authentic_amd || hygon_genuine)
                rapl_probe_amd(family, model);
 }
 
@@ -4600,6 +4603,8 @@ void process_cpuid()
                genuine_intel = 1;
        else if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65)
                authentic_amd = 1;
+       else if (ebx == 0x6f677948 && ecx == 0x656e6975 && edx == 0x6e65476e)
+               hygon_genuine = 1;
 
        if (!quiet)
                fprintf(outf, "CPUID(0): %.4s%.4s%.4s ",
-- 
2.7.4