On Wed, Mar 27, 2013 at 05:37:21PM -0500, Jacob Shin wrote: > Future AMD processors, starting with Family 16h, can provide software > with feedback on how the workload may respond to frequency change -- > memory-bound workloads will not benefit from higher frequency, where > as compute-bound workloads will. This patch enables this "frequency > sensitivity feedback" to aid the ondemand governor to make better > frequency change decisions by hooking into the powersave bias. > > Signed-off-by: Jacob Shin <jacob.shin@xxxxxxx> > --- > arch/x86/include/uapi/asm/msr-index.h | 1 + > drivers/cpufreq/Kconfig.x86 | 10 ++++++++++ > drivers/cpufreq/Makefile | 1 + > 3 files changed, 12 insertions(+) > > diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h > index 7a060f4..b2e6c49 100644 > --- a/arch/x86/include/uapi/asm/msr-index.h > +++ b/arch/x86/include/uapi/asm/msr-index.h > @@ -173,6 +173,7 @@ > #define MSR_AMD64_TSC_RATIO 0xc0000104 > #define MSR_AMD64_NB_CFG 0xc001001f > #define MSR_AMD64_PATCH_LOADER 0xc0010020 > +#define MSR_AMD64_FREQ_SENSITIVITY 0xc0010080 > #define MSR_AMD64_OSVW_ID_LENGTH 0xc0010140 > #define MSR_AMD64_OSVW_STATUS 0xc0010141 > #define MSR_AMD64_DC_CFG 0xc0011022 > diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86 > index d7dc0ed..6c714b0 100644 > --- a/drivers/cpufreq/Kconfig.x86 > +++ b/drivers/cpufreq/Kconfig.x86 > @@ -129,6 +129,16 @@ config X86_POWERNOW_K8 > > For details, take a look at <file:Documentation/cpu-freq/>. > > +config X86_AMD_FREQ_SENSITIVITY > + tristate "AMD 'frequency sensitivity feedback' powersave bias" > + depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ > + help > + This adds support for 'frequency sensitivity feedback' feature on > + supported AMD processors, which hooks into the ondemand governor's > + powersave bias to influence frequency change decisions. > + > + If in doubt, say N. > + > config X86_GX_SUSPMOD > tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation" > depends on X86_32 && PCI > diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile > index 863fd18..01dfdaf 100644 > --- a/drivers/cpufreq/Makefile > +++ b/drivers/cpufreq/Makefile > @@ -41,6 +41,7 @@ obj-$(CONFIG_X86_SPEEDSTEP_CENTRINO) += speedstep-centrino.o > obj-$(CONFIG_X86_P4_CLOCKMOD) += p4-clockmod.o > obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o > obj-$(CONFIG_X86_INTEL_PSTATE) += intel_pstate.o > +obj-$(CONFIG_X86_AMD_FREQ_SENSITIVITY) += amd_freq_sensitivity.o So sorry .. this file did not get git add'ed. Will resend in a bit > > ################################################################################## > # ARM SoC drivers > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
