linux-kernel - [PATCH 1/1]: turbostat: Fix Pkg Power on Zen

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Message-ID: <cc9628ac-d612-6c7d-6bc1-ac13da980659@garloff.de>
Date:   Mon, 1 Feb 2021 10:06:39 +0100
From:   Kurt Garloff <kurt@...loff.de>
To:     Len Brown <len.brown@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/1]: turbostat: Fix Pkg Power on Zen

commit 5d399d05df42ffcaa2b3836b580631c4024487a0
Author: Kurt Garloff <kurt@...loff.de>
Date:   Mon Feb 1 09:01:47 2021 +0000

    turbostat: Fix Pkg Power tracking on Zen
   
    AMD Zen processors use a different MSR (MSR_PKG_ENERGY_STAT) than intel
    (MSR_PKG_ENERGY_STATUS) to track package power; however we want to record
    it at the same offset in our package_data.
    offset_to_idx() however only recognized the intel MSR, erroring
    out with -13 on Zen.
   
    With this fix, it will support the Zen MSR.
    Tested successfully on Ryzen 3000 & 5000.
   
    Signed-off-by: Kurt Garloff <kurt@...loff.de>

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 389ea5209a83..cb830e73d899 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -325,6 +325,7 @@ int offset_to_idx(int offset)
     int idx;
 
     switch (offset) {
+    case MSR_PKG_ENERGY_STAT:
     case MSR_PKG_ENERGY_STATUS:
         idx = IDX_PKG_ENERGY;
         break;

-- 
Kurt Garloff <kurt@...loff.de>
Cologne, Germany