AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

tools/power turbostat: Read extended processor family from CPUID

Browse Source 
This fixes the reported family on modern AMD processors (e.g. Ryzen,
which is family 0x17). Previously these processors all showed up as
family 0xf.

See the document
https://support.amd.com/TechDocs/56255_OSRR.pdf
section CPUID_Fn00000001_EAX for how to calculate the family
from the BaseFamily and ExtFamily values.

This matches the code in arch/x86/lib/cpu.c

Signed-off-by: Calvin Walton <calvin.walton@kepstin.ca>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Calvin Walton 2018-07-27 07:50:53 -04:00 committed by Len Brown
parent 2ffbb22406
commit 5aa3d1a20a
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/power/x86/turbostat/turbostat.c
View File

@ -4457,7 +4457,9 @@ void process_cpuid()
family = (fms >> 8) & 0xf; family = (fms >> 8) & 0xf;
model = (fms >> 4) & 0xf; model = (fms >> 4) & 0xf;
stepping = fms & 0xf; stepping = fms & 0xf;
if (family == 6 || family == 0xf) if (family == 0xf)
family += (fms >> 20) & 0xff;
if (family >= 6)
model += ((fms >> 16) & 0xf) << 4; model += ((fms >> 16) & 0xf) << 4;
if (!quiet) { if (!quiet) {