tools/power/turbostat: Fix turbostat for AMD Zen CPUs

It was reported that on Zen+ system turbostat started exiting,
which was tracked down to the MSR_PKG_ENERGY_STAT read failing because
offset_to_idx wasn't returning a non-negative index.

This patch combined the modification from Bingsong Si and
Bas Nieuwenhuizen and addd the MSR to the index system as alternative for
MSR_PKG_ENERGY_STATUS.

Fixes: 9972d5d84d76 ("tools/power turbostat: Enable accumulate RAPL display")
Reported-by: youling257 <youling257@gmail.com>
Tested-by: youling257 <youling257@gmail.com>
Tested-by: Kurt Garloff <kurt@garloff.de>
Tested-by: Bingsong Si <owen.si@ucloud.cn>
Tested-by: Artem S. Tashkinov <aros@gmx.com>
Co-developed-by: Bingsong Si <owen.si@ucloud.cn>
Co-developed-by: Terry Bowman <terry.bowman@amd.com>
Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index ace100d..b5f4ec2 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -302,7 +302,10 @@ int idx_to_offset(int idx)
 
        switch (idx) {
        case IDX_PKG_ENERGY:
-               offset = MSR_PKG_ENERGY_STATUS;
+               if (do_rapl & RAPL_AMD_F17H)
+                       offset = MSR_PKG_ENERGY_STAT;
+               else
+                       offset = MSR_PKG_ENERGY_STATUS;
                break;
        case IDX_DRAM_ENERGY:
                offset = MSR_DRAM_ENERGY_STATUS;
@@ -331,6 +334,7 @@ int offset_to_idx(int offset)
 
        switch (offset) {
        case MSR_PKG_ENERGY_STATUS:
+       case MSR_PKG_ENERGY_STAT:
                idx = IDX_PKG_ENERGY;
                break;
        case MSR_DRAM_ENERGY_STATUS:
@@ -358,7 +362,7 @@ int idx_valid(int idx)
 {
        switch (idx) {
        case IDX_PKG_ENERGY:
-               return do_rapl & RAPL_PKG;
+               return do_rapl & (RAPL_PKG | RAPL_AMD_F17H);
        case IDX_DRAM_ENERGY:
                return do_rapl & RAPL_DRAM;
        case IDX_PP0_ENERGY: