leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cpupower: Do detect IDA (opportunistic processor performance) via cpuid

Browse Source 
IA32-Intel Devel guide Volume 3A - 14.3.2.1
-------------------------------------------
...
Opportunistic processor performance operation can be disabled by setting bit 38 of
IA32_MISC_ENABLES. This mechanism is intended for BIOS only. If
IA32_MISC_ENABLES[38] is set, CPUID.06H:EAX[1] will return 0.

Better detect things via cpuid, this cleans up the code a bit
and the MSR parts were not working correctly anyway.

Signed-off-by: Thomas Renninger <trenn@suse.de>
CC: lenb@kernel.org
CC: linux@dominikbrodowski.net
CC: cpufreq@vger.kernel.org
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Thomas Renninger
2011-07-21 11:54:54 +02:00
committed by Dominik Brodowski
parent 8fb2e440b2
commit 029e9f7366
4 changed files with 9 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
tools/power/cpupower/utils/helpers/misc.c
View File

@@ -20,16 +20,8 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
if (ret <= 0)
return ret;
*support = 1;
} else if (cpupower_cpu_info.vendor == X86_VENDOR_INTEL) {
ret = msr_intel_has_boost_support(cpu);
if (ret <= 0)
return ret;
*support = ret;
ret = msr_intel_boost_is_active(cpu);
if (ret <= 0)
return ret;
*active = ret;
}
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)
*support = *active = 1;
return 0;
}
#endif /* #if defined(__i386__) || defined(__x86_64__) */