From: Srinivas Pandruvada Date: Wed, 10 Jan 2018 19:38:52 +0000 (-0800) Subject: cpufreq: intel_pstate: Add Skylake servers support X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d8de7a44e11f98f2c2a4c2e12e79ba9ffb839306;p=linux.git cpufreq: intel_pstate: Add Skylake servers support Currently intel_pstate can function only in HWP mode on Skylake servers. When HWP feature is not enabled on the processor then acpi-cpufreq is driver is used. Based on the power and performance tests using intel_pstate scaling algorithm the results are comparable. But intel_pstate brings in additional features: - Display of turbo frequency range, which many users like to see - Place limits in the turbo frequency range when platform allows Since these tests are done only using non PID algorithm introduced in kernel version 4.14, this patch is not a backport candidate. So each user has to carefully weigh the benefits before he backports. Signed-off-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 3b6616b15c598..7edf7a0e5a96a 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -1620,6 +1620,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = { ICPU(INTEL_FAM6_XEON_PHI_KNM, knl_funcs), ICPU(INTEL_FAM6_ATOM_GOLDMONT, core_funcs), ICPU(INTEL_FAM6_ATOM_GEMINI_LAKE, core_funcs), + ICPU(INTEL_FAM6_SKYLAKE_X, core_funcs), {} }; MODULE_DEVICE_TABLE(x86cpu, intel_pstate_cpu_ids);